• <tr id="yyy80"></tr>
  • <sup id="yyy80"></sup>
  • <tfoot id="yyy80"><noscript id="yyy80"></noscript></tfoot>
  • 99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

    Scientific Understanding of China’s Belt and Road Initiative and Related Themes for Study

    2017-03-28 02:04:39
    Contemporary Social Sciences 2017年1期
    關(guān)鍵詞:作用力參與度控制算法

    Scientific Understanding of China’s Belt and Road Initiative and Related Themes for Study

    Liu Weidong*

    The Belt and Road Initiative refers to the Silk Road Economic Belt and the 21st Century Maritime Silk Road. As a new mode of international economic cooperation proposed by China to expand economic globalization, the Initiative is aimed at promoting orderly and free flow of economic factors, highly efficient allocation of resources and deep integration of markets, encouraging the countries along the Belt and Road to achieve economic policy coordination and carry out broader and more in-depth regional cooperation with higher standards, and jointly creating an open, inclusive and balanced regional economic cooperation architecture that benefits all. The initiative contains novel ideas in that the real spirit of the Silk Road is“peace and cooperation, openness and inclusiveness, mutual learning and mutual benefit.”Analyzing the Belt and Road Initiative in the context of economic globalization and the changing configuration worldwide, this article explores the initiative’ s spatial connotation by revealing its multi-layered and trans-scale features, and points out that the Initiative coordinates the all-around opening-up of China. This article also suggests some geographic research themes under the Initiative including geopolitical studies, country-based geography, foreign direct investment theories and optimization of transportation coordination.

    the Belt and Road Initiative; Silk Road; economic globalization; geopolitics

    1. Introduction

    At the Boao Forum for Asia held in Hainan on March 27, 2015, the Chinese National Development and Reform Commission, the Ministry of ForeignAffairs and the Ministry of Commerce jointly issued theVision and Actions on Jointly Building the Silk Road Economic Belt and the 21st Century Maritime Silk Road(hereinafter referred to asVision and Actions) (National Development and Reform Commission et al., 2015). This marks that “The Belt and Road Initiative” steps into the stage of comprehensive construction which will have an historical influence on China. If in the first 30 years of reform and opening-up, China deeply participated in economic globalization by actively “inviting in,” the Belt and Road Initiative (here after referred to as “the Initiative”) which marks the coming of a new phase of globalization characterized by China’s “going out”. Since President Xi Jinping proposed the Silk Road Economic Belt in Kazakhstan on September 7, 2013 and the joint buildup of the 21st Century Maritime Silk Road in Indonesia on October 3, in the same year, the Initiative has drawn much attention from varied circles at home and abroad, including the academic field. However, due to the lack of official interpretation of the Initiative, understandings of the Initiative by the various circles were more or less speculative.The Vision and Actionsmakes the Initiative more public and transparent, bringing about the possibility of a scientific reading to the Initiative and an understanding of the research themes therein.

    According tothe Vision and Actions, the Initiative is aimed at promoting orderly and free flow of economic factors, highly efficient allocation of resources and deep integration of markets, encouraging the countries along the Belt and Road to achieve economic policy coordination and carry out broader and more in-depth regional cooperation with higher standards, and jointly creating an open, inclusive and balanced regional economic cooperation architecture that benefits all (National Development and Reform Commission et. al., 2015). It shows that on the premise of conforming to the current trend and world developing mechanism, China expects to integrate into the global economic system more deeply and to play a more active role in leading the world’s economic development. However, the framework of the Initiative, which contains ideas regarding economic globalization is quite different from those of the past, namely;“peace and cooperation, openness and inclusiveness, mutual learning and mutual benefits.” Moreover, it emphasizes that “It should be jointly built through consultation to meet the interests of all.” The Belt and Road Initiative can be expressed simply as; “one core concept” (peace, cooperation, development and mutual benefit), “five key points of cooperation”(policy coordination, facilities connectivity, unimpeded trade, financial integration and peopleto-people bonds) and “three communities” (the communities of shared interests, destiny and responsibility). The Initiative is an inevitable result of the changes in economic patterns in the world and the deepening of economic globalization. The scientific connotation and its thematic issues involved need to be carefully studied.

    2. Cultural Connotation of the Silk Road

    The phrase “silk road” appears in both the Silk Road Economic Belt and The 21st Century Maritime Silk Road. However, the Belt and Road Initiative is not to reconstruct the international trade routes of the past. What the Initiative means is the cultural connotation of the Silk Road, namely, peace, friendship, communication and prosperity, which form the core concepts in theVision and Actions.

    The world economy today features an in-depth economic integration among countries and a welldeveloped trade system, and it makes sense to say the economic activities and people’s life cannot be sustained without trade. People are so familiar withtoday’s trade that even the flourish trade in ancient times is forgotten. China’s trading activities with other Euro-Asian countries date back to the Spring and Autumn Period and the Warring States period (even to the Shang and Zhou dynasties) (Nan Yu, 2012). After the Han Dynasty, trade in China was gradually dominated and even monopolized by the government, resulting in continued expansion in both scale and scope. During the heyday, China traded with most countries in Eurasia as well as North Africa and East Africa. Historically, no proper noun was coined to define those international longdistance trading routes. In 1877, German geographer Ferdinand von Richthofen created the term Silk Road to denote the ancient trading routes in his bookChina: The Results of My Travels and the Studies based thereon(Waugh, 2007). But he used Silk Road only to refer to the Central China-Hexi Corridor-Tarim Basin-Central Asia-Mediterranean trading route. It was so termed because silk was the major commodity traded via the route from the Han to the Tang Dynasty. Since then, the term Silk Road, which has a strong historical and cultural connotation, has gained wide recognition and extended applications. The historic Southern Tea Road (Zhu Luli, 1991) and the trading routes on North China’s prairies (Liu Yingsheng, 1995), as well as the maritime trading routes since the Song and Yuan dynasties (Han Huchu, 2004) are also called the Silk Road. Of course, major products for trade on these routes are not limited to silk, varying from one historical period to another. During the Song, Yuan and Ming dynasties, trading products on the maritime Silk Road mainly include silk, porcelain, tea and spices. The Silk Road is not only a synonym for ancient trade but also an historic symbol of cultural exchanges between China and Eurasia (Chen Yan, 1997). With trade and people-to-people exchanges countries along the Silk Road learned from each other, creating splendid cultures.

    Past studies of the Silk Road are mainly limited on history and cultural relics, and such studies lack utilitarian significance. Since the Initiative was proposed, however, there was a fever to excavate historical and cultural relics related to the Silk Road to establish their positions in the Initiative. While such practice has a certain significance, the connotation of the Silk Road in the Initiative is obviously misunderstood. Historically, the scope and direction of the Silk Road were subjected to changes in geographical environments, conditions of economic development, and the evolution of politics and religion. The outline of today’s Silk Road is simply a picture taken by those who envision thousands of years of Chinese history in a single moment. In fact, the Silk Road should not be literally interpreted as a spatial phenomenon with fixed routes. The Road today is more an abstract cultural symbol than a physical construction with actual existence. Throughout its history, the Silk Road was often interrupted by wars and mainly existed during peaceful eras, and common prosperity was brought about by commercial and cultural exchanges along the road. Therefore, the cultural connotation of the Silk Road can be summed up in four words; peace, friendship, exchanges and prosperity. From this perspective, the Chinese government borrows the Silk Road as a cultural symbol to deliver an idea, namely; “peace, cooperation, development, and mutual benefit.”

    3. The Initiative and Economic Globalization

    According toVision and Actions, the Initiative is not to “start all over again,” but “to uphold the global free trade regime and the open world economy”(National Development and Reform Commission, 2015). The Initiative was formulated with the backdrop of world-configuration adjustmentand became an important framework to deepen economic globalization. However, the framework is not simply an extension of the past economic globalization but a new form of globalization, with its defining feature being the cultural connotation of the Silk Road. To put it another way, the Initiative manifests inclusive globalization and does not deviate from the basic mechanism of economic globalization, the liberalization of investment and trade.

    The emergence and development of economic globalization is closely related to the popularity of neoliberalism. Two world oil crises in the 1970s marked the end of booming economic growth for more than 20 years following World War II and the beginning of serious stagnation in developed countries. To find a way out of their woes, the UK and the US abandoned “Keynes’ national welfare”policy and turned to neoliberalism as a prescription, which advocates the policy of reducing government intervention and full privatization. They began large-scale overseas capital exports and industrial transfers and moved into the stage of global capitalism expansion. To meet the need of capital export, neoliberalism was regarded as the theoretical basis for investment and trade liberalization. A typical case here is the Washington Consensus led by the United States as the prescription for Latin America and the restructuring countries in Eastern Europe. Liberalization in trade and economy, complete market mechanism and full privatization make up the core in the Consensus. Unfortunately, few countries adopting the Washington Consensus escaped their economic woes. China, on the other hand, which combined government intervention with market adjustments, achieved leapfrog economic growth. Economic globalization based on neoliberalism shaped the world’s configuration during the past 30 years, while the regulatory modes of neoliberalism in financial markets led to the 2008 global financial crisis. Under the economic globalization based on neoliberalism, therefore, capital turned out to be the biggest winner, while society paid a huge price. In such context, both developed countries like the UK and the US and developing countries like China must think about reforming the governance mode to promote further development through economic globalization. In this aspect, the Initiative makes a useful try.

    Since the 1980s, China has been deeply involved in the process of economic globalization through gradual reform and opening-up. On the one hand, China achieved fast economic growth through introducing investment, technology and management experience. On the other hand, China has gradually established its own governance mechanism to adapt to economic globalization. It should be admitted that China’s rapid economic development benefits from economic globalization, but China also made great contributions to the growth of the world economy, changing the economy pattern of the world. At the beginning of China’s reform and opening-up, its gross domestic product (GDP) accounted for only about 5% of the world’s GDP, exports making up less than 1.5% of the world’s total. By 2013, China’s share in world’s GDP rose to 12.3 %, with the ratio of its export value accounting for 12%. China became the world’s second largest economy in 2010 and the No. 1 goods trader in 2013. Moreover, China’s contribution to the world’s economic growth rate remains around 30% since the global financial crisis in 2008 (27.8% in 2014). Although China’s economy cannot currently be deemed as strong, its huge economic size ($10 trillion in 2014) is enough to make China a shaping force in the global economy. Given the trend that world economic ties are getting closer and closer, development and change of such a large economy will have a significant impact on other related countries. In this context, the Initiative is China’s promise to deepen economicglobalization, and it also represents China’s effort to preserve the achievements and mechanism of economic globalization.

    In the long run, China’s rise over past 30 years is the biggest change in the world economic pattern in the past 100 years. It is also one of the major events of changes of the world economic pattern in the past 300 years. According to estimate of Angus Maddison, an economic historian, China’s GDP accounted for nearly 1/3 of the global GDP in the middle of the 18th Century, while the United States’ share was insignificant (Maddison, 2007; Dicken, 2010). When the PRC was founded 200 years later, China’s proportion dropped to 1/20, while the United States increased to 27% (Figure 1). Till the beginning of China’s reform and openingup, its GDP accounted for about 5% of the amount of global GDP (Figure 2). After more than 30 years of rapid growth, China’s share of the world’s GDP now approaches 12.5%. Accordingly, the United States’ share of GDP in the world total has dropped to about 22%. With the rise of China, the economic share of East Asia in the world exceeds that of the United States. This marks the coming of an Asian century. As a big country, China is responsible for better economic growth in Asia and the world. However, China’s share in international financial institutions is currently very low. In the World Bank, the International Monetary Fund and the Asian Development Bank, for example, China only accounted for 5.17%, 3.81% and 3.81% respectively in the voting rights, and China can hardly play a role which is proportionate to its size in promoting world economic growth. In this sense, the Initiative is an important solution to such an irrational situation.

    In terms of its own stage of development, China’s economic growth goes into the NewNormal. On the one hand, the demographic dividend that has lasted for more than 30 years is disappearing gradually. The rapid rise in labor costs leads to the loss of competitive advantages in some laborintensive industries. This accords with the basic periodic law of economic globalization, where largescale industrial transfer happens every thirty or forty years. On the other hand, due to overly optimistic capacity expansion for more than 10 years, some businesses in the raw material industry in China have overcapacity with the slowdown of economic growth. They are not lagging in production capacity or techniques, but domestic oversupply forces them to transfer. In addition, China’s huge consumer market also breeds several large enterprises, which are becoming multinational companies with multinational investments and global operational capabilities. These factors mark China’s entry into a large-scale “going global” period. As it can be seen from Figure 3b, China’s foreign direct investment has had a big growth spurt since 2004 or more obviously since 2008, which was only $5.5 billion in 2004. The figure rose to $55.9 billion in 2008 and $140 billion in 2014. It increased 25 times in 10 years. This growth trend is similar to foreign direct investment of the developed countries in Europe and America in the 1980s and 1990s (Figure 3a). As a result, the mechanisms that China adopts in“going global” will affect many countries, be it the mechanism of neoliberalism globalization or the inclusive one. Through joint build-up of the Belt and Road, the chosen mechanism of economic globalization will be improved as much as possible to avoid its negative effects. The Initiative meets the need for China’s “going global” and will make globalization beneficial to more countries and regions.

    The Belt and Road Initiative is a Chinese mode of economic globalization, and an effort to promote sound development through globalization. The Initiative is not a solo project by China, nor a Chinese version of the Marshall Plan. Instead, it is an international cooperation platform which promotes regional win-win and development through economic globalization.

    4. Spatial Connotation of the Initiative

    Outwardly, the Initiative is a highly selective concept in space because both “belt” and “road”literally means stripe-shaped economic entities, which are exclusive in space. Such superficial understanding has caused a lot of misunderstanding to the Initiative. For example, some provinces thinkthey hold a special and exclusive position in the Initiative, while others think they have nothing to do with it. In fact, the Initiative is a trans-scale concept which bears multi-layered spatial connotations.

    First, the Initiative is not a closed system. It has no absolute boundary, and its location cannot be accurately mapped. Fundamentally, the Initiative is an open and inclusive network of international economic cooperation, and any country can choose to join the Initiative. It is by no means an exclusive platform. Although the Chinese Ministry of Foreign Affairs once mentioned over 60 countries and a population of about 4 billion along the Belt and Road,Vision and Actionsdoes not prescribe a specific boundary or the list of countries for the Initiative. Instead, it points out that the Belt and Road runs through Asia, Europe and Africa.

    Second, because the Initiative is a meganetwork of international economic cooperation, most cooperative activities are inevitably carried out among the countries that do not border each other. The Initiative is not sub-regional cooperation within neighboring countries. Within China,Vision and Actionsdoes mention some provinces and cities (National Development and Reform Commission, 2015). For example, Xinjiang and Fujian are said to be the core areas of the Initiative, and Xi’an will be built into a new height of opening-up in interior China.Vision and Actionsalso said that Chongqing, Chengdu, Zhengzhou, Wuhan, Nanchang, Hefei, Changsha are the leading areas of opening-up in the inland regions, while Shanghai, Tianjin, Ningbo, Guangzhou, and Shenzhen are coastal cities to be strengthened. In spite of this, it does not mean these provinces and cities have the exclusive positions. In fact, all regions can participate in the construction of the Belt and Road. The co-construction tasks, including economic and trade cooperation, cultural cooperation and financial cooperation are not absolutely the exclusive job of the above-mentioned provinces and regions. Some provinces which are closer to countries along the Belt and Road in trade and cultural exchanges are not mentioned, such as Shandong and Jiangsu. Some provinces and regions inVision and Actionsare mentioned with aims to combine the regional development within China with the Initiative, and this will form interactions among East China, Central China and West China, promote the development of relative balance, and enhance the levels of opening-up as soon as possible. It is not limited to the certain mentioned areas.

    下肢康復(fù)訓(xùn)練后期,患者需要接受主動(dòng)訓(xùn)練來提高主動(dòng)參與度并且進(jìn)一步促進(jìn)肌肉力量的恢復(fù)。因此,提出了基于模糊自適應(yīng)阻抗的主動(dòng)訓(xùn)練控制,通過檢測(cè)人機(jī)交互作用力來判斷患者的主動(dòng)運(yùn)動(dòng)意圖,基于人機(jī)交互作用力提出主動(dòng)控制算法。在主動(dòng)訓(xùn)練時(shí),引入阻抗控制保證康復(fù)機(jī)器人與患者下肢的相容性,并且采用模糊自適應(yīng)邏輯對(duì)阻抗參數(shù)實(shí)時(shí)調(diào)整。

    Third, the Initiative involves infrastructural connectivity, especially the constructions of major land and sea routes for international transportation, and the routes do have specific locations or spatial scope. For example,Vision and Actionsproposed “the Silk Road Economic Belt focuses on bringing together China, Central Asia, Russia and Europe (the Baltic); linking China with the Persian Gulf and the Mediterranean Sea through Central Asia and West Asia; and connecting China with Southeast Asia, South Asia and the Indian Ocean. The 21st Century Maritime Silk Road is from China’s coast to Europe through the South China Sea and the Indian Ocean in one route, and from China’s coast through the South China Sea to the South Pacific in the other.” (National Development and Reform Commission, 2015). Also, it says that“the Initiative will focus on jointly building a new Eurasian Land Bridge and developing China-Mongolia-Russia, China-Central Asia-West Asia and China-Indochina Peninsula economic corridors.”The China-Pakistan Economic Corridor and the Bangladesh-China-India-Myanmar Economic Corridor also require greater progress. Much infrastructure will be built on these channels and corridors with specific locations. Connectivity, as one of the Initiative’s “five goals,” is more likely carried out within sub-regions, while the other “four goals” involve more cooperation among countries inbigger scopes.

    Due to insufficient understanding of the multilayered spatial and trans-scale features, some Chinese scholars, officials, and media are used to taking the Initiative as a Chinese framework for regional development. This causes confusion to some extent. The Initiative is a national long-term plan for China’s all-round opening-up, and it also aims to jointly build an open and inclusive network of international economic cooperation with the countries along the Belt and Road. Thus, it must be a national initiative rather than a regional one. Thanks to its multi-layered feature in space, this national initiative also has significant impact on regions. However, if the Initiative is called China’s regional initiative just because of its regional influence, its position and role will be weakened. Doubts will arise from participating countries. Therefore, the Initiative cannot be deemed as equal to the “Collaborative Development Plan of Beijing-Tianjin-Hebei Region”or the “Yangtze River Industrial Belt”, which are just China’s regional economic plans in the new era.

    5. Geographic Research Themes on the Initiative

    The Initiative is China’s new concept of development and new mode of international and regional cooperation to deepen economic globalization. Joint buildup of the Belt and Road brings about quite a few research themes for scholars. Of these, geographic themes that need to be further studied include: a. Core elements and driving mechanisms of geopolitical relations in the era of globalization; b. Geographic research on countries along the Belt and Road; c. Theories on foreign direct investment under the framework of the Initiative; and d. Spatial coordination for land and sea transportation.

    Geopolitics is a traditional field for geographic study. Fundamentally, geopolitics explores the relationships between geographical factors (locations, ethnicity, and economic strength) and the political behavior of the national majority, especially geographical factors that safeguard the national interests. In modern history, the emerging powers have attached much importance to geopolitical study, and therein emulated many influential geopoliticians, such as Friedrich Ratzel (German), Alfred Thayer Mahan (American), and Halford Mackinder (British). For various reasons, geopolitical study in China is very weak, with few research fellows and little published literature. China’s rising international position calls for more geopolitical studies. The buildup of the Initiative will undoubtedly involve coordination of interests among participating countries and affect the adjustment of international configurations. Inevitably, this is a changing process of geopolitical patterns. Therefore, the geopolitical foundation of the Initiative, its influence on geopolitical configurations, and geopolitical theories in accord with the Initiative are unavoidable research themes in the geographic circle.

    Visions and Actionsadvocates the principle of“wide consultation, joint construction and shared benefits.” The key to effectively promoting the Initiative is that the countries along the line should jointly identify projects of common interests and mutual-benefits. And this cannot be done without communication on relevant policies and construction plans from related countries. To consult and communicate smoothly, mutual understanding needs to be deepened in many fields, including politics, law, administration, culture, religion, economy, social structure, resources, the environment, and difference between governance structures. These are topics in country-based geographic study. Over the past 30 years, due to the value orientation and the strong demand in domestic construction markets, Chinese geographic studies on world geography or foreign geography have been shrinking, andChina’s knowledge of many countries along the Belt and Road has remained unchanged for decades. This will affect communications and consultation between China and the countries to some extent and unnecessary risks cannot be avoided. Therefore, it is imperative that country-based geographic studies along the Belt and Road be carried out.

    The Initiative will be a process of deepened globalization characterized by China’s “going global.”It needs theories of foreign direct investment for support. Since the 1970s when capital from developed countries began “going global” on a large scale, theories of foreign direct investment have been important research themes for international geography and business circles. The early theory of new international division of labor, the Eclectic Paradigm of International Production by John H.Dunning, and the 1990s’ network theory, all play a guiding role in foreign direct investment in developed countries. However, the existing theories of foreign direct investment are mainly based on the experience of these countries, and are extremely influenced by Neoliberalism. We need to wait and see whether these theories can effectively guide the Initiative. Therefore, it would be a new geographic research theme to test the existing theories of foreign direct investment with the Initiative’s projects to find the key variables, and to modify or reconstruct the theories.

    A prominent feature of the Belt and Road is optimization of transporting organization in trade. For more than a century, due to continuous development of shipping technology, international trade was done mainly through sea routes. Other modes of transport are incomparable to ocean shipping because of its convenience and low cost. But it is time-consuming. For example, shipping time from China’s coastal ports to Europe is generally more than 30 days. The cost and speed of road (rail) transporting are higher than shipping but lower than airlifting. Because of Customs clearance in multiple sovereign states, international rail transport is often cumbersome. Facilities connectivity and unimpeded trade in the Initiative improve comparative advantages of the road (rail) freight. In fact, China has recently opened a variety of “five scheduled trains” such as the Chongqing-Singapore-Europe direct freight train, the Chengdu-Europe express freight train and the Xi’an-Europe freight train. These are preliminary exploration in this respect. In carrying out the Initiative, therefore, how to further optimize transporting coordination for cargo trade is another theme worth deeper study by geographic scholars.

    6. Conclusion

    The Belt and Road Initiative is a new model of international and regional economic cooperation proposed by China for deepening economic globalization. The Initiative will impact China’s socioeconomic development and all-round opening-up, promote economic development in the countries involved, and improve international economic patterns. It is a national initiative to coordinate China’s all-round opening-up. Although it has a significant regional influence, it cannot be regarded as a regional initiative. To understand the Initiative correctly, we must study the cultural connotation of the Silk Road and the developing trend of economic globalization, and explore the spatial connotation of the Initiative, especially its multi-layered feature in space.

    At present and in the long run, it is of strategic importance to provide intellectual support for the Initiative. Due to its rich connotation in geography, the Initiative will bring about opportunities for development of Chinese geography. And it will promote study and innovation in geopolitics, world geography, international direct investment theories, transporting coordination and others.

    (Translator: Qian Hongnian; Editor: Jia Fengrong)

    This paper has been translated and reprinted with the permission ofProgress in Geography, No.5, Vol.34, May. 2015.

    REFERENCES

    [1] Chen Yan. Maritime Silk Road and Cultural Exchanges between China and Foreign Countries [M]. Beijing: Peking University Press, 1996.

    [2] National Development and Reform Commission, Ministry of Foreign Affairs, Ministry of Commerce of China. Vision and Actions on Jointly Building Silk Road Economic Belt and 21st century Maritime Silk Road [R]. Beijing: Foreign Languages Press, 2015.

    [3]Han Huchu, Yang Shihong. A Review on the Earliest Departure Port of the Maritime Silk Road in Ancient China [J].Geographical Science, 2004, 24(6): 738-745.

    [4]Liu Yingsheng. Silk Road Culture: Volume of the Prairie[M]. Hangzhou: Zhejiang People’s Press, 1995.

    [5] Nan Yu. Research on the Strategy of Cross-region Tourism Cooperation and Development in the Five Provinces in Northwest China along Silk Road [M]. Beijing: Science Press, 2012: 27.

    [6] Zhu Changli. Southern Silk Road and the Economic and Cultural Exchanges between China, India and Burma [J].Southeast Asian and South Asian Studies,1991. (3): 7-17

    [7] Dicken P. Global shift (6th Edition) [M]. London: Sage, 2010.

    [8] Maddison A. Chinese Economic Performance in the Long Run [M/OL]. OECD Publishing, 2007-09-28(2) [2015-04-13]. DOI: 10.1787/9789264037632-en. 2007.

    [9] Waugh D C. Richthofen’s “Silk Roads” : towards the Archaeology of the Concept [J].Silk Road, 2007. 5(1): 2-10.

    *Liu Weidong, professor, Key Laboratory of Regional Sustainable Development Modeling, CAS, Institute of Geographic Sciences

    and Natural Resources Research, CAS.

    猜你喜歡
    作用力參與度控制算法
    提高學(xué)生課堂參與度 激活珠心算生命力
    初中語文教學(xué)中如何有效提高學(xué)生的課堂參與度
    甘肅教育(2020年24期)2020-04-13 08:24:40
    鼓勵(lì)自主安全活動(dòng) 提升員工參與度
    基于ARM+FPGA的模塊化同步控制算法研究
    高考中微粒間作用力大小與物質(zhì)性質(zhì)的考查
    一種優(yōu)化的基于ARM Cortex-M3電池組均衡控制算法應(yīng)用
    院感防控有兩種作用力
    一種非圓旋轉(zhuǎn)工件支撐裝置控制算法
    非穩(wěn)定流固耦合作用力下風(fēng)力機(jī)收縮盤接觸分析
    芻議教育在勞動(dòng)力流動(dòng)中的作用力
    如日韩欧美国产精品一区二区三区 | 91久久精品国产一区二区成人| 色吧在线观看| 国产精品无大码| 亚洲欧美一区二区三区黑人 | 午夜免费观看性视频| 91精品国产九色| 久久久久网色| 亚洲精品国产av成人精品| 久久精品久久精品一区二区三区| 国产精品欧美亚洲77777| 日韩制服骚丝袜av| 精品久久久久久电影网| av福利片在线| 日本av免费视频播放| 22中文网久久字幕| 日本免费在线观看一区| 精品熟女少妇av免费看| 亚洲成人av在线免费| 女性生殖器流出的白浆| 五月开心婷婷网| 三级经典国产精品| 国产高清不卡午夜福利| 国产高清不卡午夜福利| 国产精品一区二区在线观看99| 色5月婷婷丁香| 国产毛片在线视频| 涩涩av久久男人的天堂| 97在线人人人人妻| tube8黄色片| 日日啪夜夜爽| 久久久a久久爽久久v久久| 涩涩av久久男人的天堂| 免费人成在线观看视频色| av在线老鸭窝| 成人午夜精彩视频在线观看| 两个人免费观看高清视频 | 一区在线观看完整版| 亚洲美女黄色视频免费看| 观看av在线不卡| 欧美日韩精品成人综合77777| 视频区图区小说| 婷婷色综合大香蕉| 亚洲美女黄色视频免费看| 国产 一区精品| 如日韩欧美国产精品一区二区三区 | 国产片特级美女逼逼视频| 国产成人aa在线观看| 免费黄色在线免费观看| 黄色视频在线播放观看不卡| 日韩 亚洲 欧美在线| 国产日韩欧美视频二区| 国产精品久久久久久精品古装| 国产精品久久久久久精品古装| 欧美3d第一页| 国产在线一区二区三区精| 欧美一级a爱片免费观看看| 国产在线男女| 一本—道久久a久久精品蜜桃钙片| 国产一区二区在线观看日韩| 日本wwww免费看| 我的女老师完整版在线观看| 爱豆传媒免费全集在线观看| 国产精品国产三级国产av玫瑰| 多毛熟女@视频| 国产精品三级大全| 久久午夜综合久久蜜桃| 久久午夜综合久久蜜桃| 高清不卡的av网站| 一区二区三区免费毛片| 婷婷色综合www| 色婷婷久久久亚洲欧美| 亚洲四区av| 秋霞在线观看毛片| 国产精品伦人一区二区| 国产91av在线免费观看| 国产色爽女视频免费观看| 国产成人午夜福利电影在线观看| 国产伦精品一区二区三区四那| 日日摸夜夜添夜夜添av毛片| 久久精品国产亚洲av涩爱| 内射极品少妇av片p| 性高湖久久久久久久久免费观看| 国产白丝娇喘喷水9色精品| 夜夜看夜夜爽夜夜摸| 国产成人精品久久久久久| 国产女主播在线喷水免费视频网站| 国产 一区精品| 国产精品无大码| 日本vs欧美在线观看视频 | 亚洲美女搞黄在线观看| 国产色爽女视频免费观看| 亚洲欧美成人精品一区二区| 国产在线视频一区二区| av有码第一页| 国产成人精品久久久久久| 汤姆久久久久久久影院中文字幕| 久久99蜜桃精品久久| 欧美日韩精品成人综合77777| 女人精品久久久久毛片| 丰满乱子伦码专区| 少妇猛男粗大的猛烈进出视频| 插阴视频在线观看视频| a 毛片基地| 国产精品国产三级国产专区5o| 建设人人有责人人尽责人人享有的| 在线亚洲精品国产二区图片欧美 | 亚洲不卡免费看| 欧美一级a爱片免费观看看| 午夜视频国产福利| 午夜福利,免费看| 亚洲中文av在线| 永久网站在线| 亚洲精品视频女| 亚洲综合色惰| 国国产精品蜜臀av免费| 在线观看免费高清a一片| 国产淫片久久久久久久久| 欧美丝袜亚洲另类| av在线老鸭窝| 国产探花极品一区二区| 大话2 男鬼变身卡| 国产熟女午夜一区二区三区 | 国产成人免费观看mmmm| 国产国拍精品亚洲av在线观看| 久久综合国产亚洲精品| 一本大道久久a久久精品| 欧美xxxx性猛交bbbb| 久久久久久久国产电影| 精品亚洲乱码少妇综合久久| 80岁老熟妇乱子伦牲交| 国产又色又爽无遮挡免| 国产精品一区二区三区四区免费观看| 亚洲av欧美aⅴ国产| 人人妻人人澡人人看| 国产精品欧美亚洲77777| 91久久精品国产一区二区成人| 久久久久网色| 国产无遮挡羞羞视频在线观看| 涩涩av久久男人的天堂| 国产精品不卡视频一区二区| 久久女婷五月综合色啪小说| 国产精品一区二区性色av| 深夜a级毛片| 国产精品秋霞免费鲁丝片| 午夜久久久在线观看| 久久午夜福利片| 久久久久精品性色| 乱人伦中国视频| 久久精品熟女亚洲av麻豆精品| 十八禁网站网址无遮挡 | 国模一区二区三区四区视频| 亚洲国产精品成人久久小说| 久久久久久久大尺度免费视频| 国产色婷婷99| 伦理电影大哥的女人| 22中文网久久字幕| 国产精品秋霞免费鲁丝片| 多毛熟女@视频| 少妇猛男粗大的猛烈进出视频| 色婷婷久久久亚洲欧美| 国产精品蜜桃在线观看| 日韩精品免费视频一区二区三区 | a级一级毛片免费在线观看| 国产精品99久久久久久久久| 亚洲欧美精品自产自拍| 如日韩欧美国产精品一区二区三区 | 黄色一级大片看看| 亚洲av日韩在线播放| av在线观看视频网站免费| 18禁裸乳无遮挡动漫免费视频| 人人澡人人妻人| 中文字幕精品免费在线观看视频 | 91aial.com中文字幕在线观看| 97超视频在线观看视频| 最近中文字幕高清免费大全6| 亚洲人与动物交配视频| 黑人巨大精品欧美一区二区蜜桃 | 日本猛色少妇xxxxx猛交久久| 综合色丁香网| 免费黄色在线免费观看| 一级爰片在线观看| 国产黄片美女视频| 国产真实伦视频高清在线观看| 亚洲精品乱久久久久久| 久久精品久久精品一区二区三区| 欧美精品亚洲一区二区| 免费黄网站久久成人精品| 国产成人午夜福利电影在线观看| 免费大片黄手机在线观看| 亚洲精品自拍成人| 欧美精品国产亚洲| 大片免费播放器 马上看| 亚洲人与动物交配视频| 一个人免费看片子| 日韩,欧美,国产一区二区三区| a级毛片在线看网站| 免费不卡的大黄色大毛片视频在线观看| 中国国产av一级| 成年人午夜在线观看视频| 内地一区二区视频在线| 中国美白少妇内射xxxbb| 男女免费视频国产| 国产熟女午夜一区二区三区 | 国产亚洲午夜精品一区二区久久| 噜噜噜噜噜久久久久久91| 亚洲av免费高清在线观看| 又爽又黄a免费视频| 国产一区二区三区综合在线观看 | 国产精品久久久久久精品古装| av专区在线播放| 成年美女黄网站色视频大全免费 | 一级毛片 在线播放| 久久6这里有精品| 日韩一区二区三区影片| av线在线观看网站| 日日摸夜夜添夜夜添av毛片| 亚洲av欧美aⅴ国产| 免费不卡的大黄色大毛片视频在线观看| 美女内射精品一级片tv| 超碰97精品在线观看| 亚洲欧美成人精品一区二区| 两个人的视频大全免费| 桃花免费在线播放| 久久精品久久精品一区二区三区| 在线 av 中文字幕| 免费黄频网站在线观看国产| 黄色日韩在线| 国产一区二区在线观看日韩| 青青草视频在线视频观看| 最近2019中文字幕mv第一页| 国产日韩欧美在线精品| 欧美最新免费一区二区三区| av播播在线观看一区| 精品久久久久久久久av| 精品国产国语对白av| 国产精品伦人一区二区| 日韩成人伦理影院| 亚洲精品亚洲一区二区| xxx大片免费视频| 人妻人人澡人人爽人人| 狠狠精品人妻久久久久久综合| 99国产精品免费福利视频| 肉色欧美久久久久久久蜜桃| 亚洲天堂av无毛| 一级毛片久久久久久久久女| 久久人人爽人人片av| 国产淫语在线视频| 国产av码专区亚洲av| 少妇被粗大猛烈的视频| 天堂8中文在线网| 妹子高潮喷水视频| 中文资源天堂在线| 一级,二级,三级黄色视频| 自拍欧美九色日韩亚洲蝌蚪91 | 久久精品国产亚洲av涩爱| 国产精品成人在线| 久久久久人妻精品一区果冻| 午夜福利影视在线免费观看| 亚洲国产精品国产精品| 国产黄片美女视频| 亚洲欧美成人综合另类久久久| 国产av国产精品国产| 亚洲成人一二三区av| 国产成人一区二区在线| 这个男人来自地球电影免费观看 | 人人妻人人澡人人爽人人夜夜| 26uuu在线亚洲综合色| 国产黄片视频在线免费观看| 丝袜在线中文字幕| 国产亚洲欧美精品永久| 国产高清有码在线观看视频| 麻豆精品久久久久久蜜桃| 另类亚洲欧美激情| 国产精品偷伦视频观看了| 99九九线精品视频在线观看视频| 三级国产精品片| 亚洲精品一二三| 自拍偷自拍亚洲精品老妇| 丰满迷人的少妇在线观看| 国产视频内射| 亚洲国产精品999| 亚洲天堂av无毛| 日本爱情动作片www.在线观看| 国产精品伦人一区二区| 精品酒店卫生间| 最新中文字幕久久久久| 91精品伊人久久大香线蕉| 欧美成人精品欧美一级黄| 国产一区二区三区综合在线观看 | 中文字幕免费在线视频6| 人妻制服诱惑在线中文字幕| 哪个播放器可以免费观看大片| 天美传媒精品一区二区| 亚洲人与动物交配视频| 纯流量卡能插随身wifi吗| 色5月婷婷丁香| 少妇高潮的动态图| 观看av在线不卡| 大片免费播放器 马上看| 国产深夜福利视频在线观看| 欧美日韩综合久久久久久| 亚洲美女视频黄频| 国产免费一区二区三区四区乱码| 伊人久久国产一区二区| 边亲边吃奶的免费视频| 高清av免费在线| 亚洲精品日本国产第一区| 少妇的逼水好多| 亚洲一区二区三区欧美精品| 美女xxoo啪啪120秒动态图| 国产视频内射| 亚洲国产日韩一区二区| 亚洲欧洲国产日韩| 国产在视频线精品| 日本欧美视频一区| 久久久久久久久久久久大奶| 日韩强制内射视频| 亚洲成人一二三区av| 亚洲经典国产精华液单| 黑人高潮一二区| 亚洲欧美一区二区三区国产| 伦精品一区二区三区| 亚洲精品,欧美精品| 国精品久久久久久国模美| 久久精品国产a三级三级三级| 两个人的视频大全免费| 国产亚洲最大av| 在线亚洲精品国产二区图片欧美 | 在线精品无人区一区二区三| 22中文网久久字幕| 免费人妻精品一区二区三区视频| 两个人的视频大全免费| 一个人看视频在线观看www免费| 久久久国产欧美日韩av| 亚洲精品乱久久久久久| 国产探花极品一区二区| 高清午夜精品一区二区三区| 久久久久视频综合| 免费黄色在线免费观看| 久久久国产精品麻豆| 亚洲av福利一区| 韩国av在线不卡| 免费大片黄手机在线观看| 女人精品久久久久毛片| 久久久久网色| 午夜福利,免费看| 亚洲国产av新网站| 精品卡一卡二卡四卡免费| 日本欧美视频一区| 亚洲激情五月婷婷啪啪| 黄色怎么调成土黄色| 91精品国产九色| 色网站视频免费| 有码 亚洲区| 天堂俺去俺来也www色官网| h日本视频在线播放| 女人精品久久久久毛片| 日韩 亚洲 欧美在线| 精品少妇黑人巨大在线播放| 少妇丰满av| 老司机影院成人| a级片在线免费高清观看视频| 99热国产这里只有精品6| 国产精品熟女久久久久浪| 在线播放无遮挡| 国产精品秋霞免费鲁丝片| 亚洲欧美中文字幕日韩二区| 欧美高清成人免费视频www| 国产一区二区三区av在线| 高清不卡的av网站| 午夜影院在线不卡| 91久久精品电影网| 日本爱情动作片www.在线观看| 久久精品国产鲁丝片午夜精品| 寂寞人妻少妇视频99o| 9色porny在线观看| 国产爽快片一区二区三区| 制服丝袜香蕉在线| 国产日韩一区二区三区精品不卡 | 99九九在线精品视频 | 国产亚洲91精品色在线| 国产精品一二三区在线看| 黄色日韩在线| 高清av免费在线| 特大巨黑吊av在线直播| 久久女婷五月综合色啪小说| 久久久国产一区二区| 国产一级毛片在线| 高清午夜精品一区二区三区| 在线观看国产h片| 久久精品国产a三级三级三级| 交换朋友夫妻互换小说| 久久综合国产亚洲精品| 高清在线视频一区二区三区| 国产亚洲5aaaaa淫片| 大片免费播放器 马上看| av视频免费观看在线观看| 看非洲黑人一级黄片| 人妻少妇偷人精品九色| 免费看光身美女| 国产男人的电影天堂91| 亚洲精品456在线播放app| 国产成人精品久久久久久| 男人添女人高潮全过程视频| av在线观看视频网站免费| 日韩欧美精品免费久久| 亚洲欧美成人精品一区二区| 亚洲国产精品专区欧美| 热99国产精品久久久久久7| 日本黄色日本黄色录像| 多毛熟女@视频| 中文字幕免费在线视频6| 男女啪啪激烈高潮av片| 亚洲国产最新在线播放| 亚洲精品一二三| 亚洲精品乱久久久久久| 日本黄色片子视频| 夜夜看夜夜爽夜夜摸| 欧美日韩视频高清一区二区三区二| 涩涩av久久男人的天堂| 自拍偷自拍亚洲精品老妇| 插阴视频在线观看视频| 午夜福利,免费看| 亚洲精品乱久久久久久| 一级av片app| 国产成人精品久久久久久| 午夜免费鲁丝| 亚洲丝袜综合中文字幕| 久久久久精品久久久久真实原创| 下体分泌物呈黄色| 三级经典国产精品| 欧美另类一区| 中文在线观看免费www的网站| 亚洲欧美精品专区久久| 日韩亚洲欧美综合| 亚洲中文av在线| 男女国产视频网站| 中文在线观看免费www的网站| 亚洲欧美精品专区久久| 国产精品嫩草影院av在线观看| 欧美激情极品国产一区二区三区 | 伦精品一区二区三区| 成人18禁高潮啪啪吃奶动态图 | 在线观看国产h片| 亚洲国产毛片av蜜桃av| 精品国产乱码久久久久久小说| 亚洲国产色片| av福利片在线观看| 观看美女的网站| 秋霞伦理黄片| 国产成人91sexporn| 久热久热在线精品观看| 成人毛片a级毛片在线播放| 嫩草影院入口| 国产成人一区二区在线| 日韩中文字幕视频在线看片| 国产欧美日韩一区二区三区在线 | 汤姆久久久久久久影院中文字幕| 亚洲欧美清纯卡通| 女人久久www免费人成看片| 国产亚洲最大av| 国产欧美日韩精品一区二区| 自拍欧美九色日韩亚洲蝌蚪91 | 我的女老师完整版在线观看| 丝瓜视频免费看黄片| 99热国产这里只有精品6| 日本黄色片子视频| 伊人亚洲综合成人网| 99九九在线精品视频 | 久久综合国产亚洲精品| 99热这里只有是精品50| 最新中文字幕久久久久| 插阴视频在线观看视频| 日韩精品免费视频一区二区三区 | 亚洲国产精品一区三区| 免费人成在线观看视频色| 日日撸夜夜添| 欧美 日韩 精品 国产| 亚洲精品乱码久久久久久按摩| 亚洲精品国产av成人精品| 国产黄片美女视频| av国产精品久久久久影院| 午夜福利,免费看| 免费av中文字幕在线| 日韩电影二区| 一本—道久久a久久精品蜜桃钙片| 三上悠亚av全集在线观看 | 最近2019中文字幕mv第一页| 美女脱内裤让男人舔精品视频| 啦啦啦中文免费视频观看日本| 97超碰精品成人国产| 少妇的逼好多水| 欧美精品高潮呻吟av久久| 日本vs欧美在线观看视频 | 少妇被粗大猛烈的视频| 超碰97精品在线观看| 一级,二级,三级黄色视频| 亚洲国产精品成人久久小说| 欧美三级亚洲精品| 午夜91福利影院| 成人亚洲精品一区在线观看| 国精品久久久久久国模美| 久久精品国产亚洲av涩爱| 国产日韩一区二区三区精品不卡 | 亚洲精品456在线播放app| 日产精品乱码卡一卡2卡三| 人妻少妇偷人精品九色| 高清黄色对白视频在线免费看 | 亚洲第一区二区三区不卡| 精品少妇内射三级| 伦理电影大哥的女人| 啦啦啦视频在线资源免费观看| 国产精品99久久久久久久久| 亚洲精品国产成人久久av| 人妻 亚洲 视频| 国产国拍精品亚洲av在线观看| 午夜影院在线不卡| 中国三级夫妇交换| 新久久久久国产一级毛片| 国产伦精品一区二区三区视频9| 中文字幕亚洲精品专区| 久久国产乱子免费精品| 欧美丝袜亚洲另类| 只有这里有精品99| 亚洲精品成人av观看孕妇| 精品人妻偷拍中文字幕| 熟女人妻精品中文字幕| 高清黄色对白视频在线免费看 | av福利片在线观看| 毛片一级片免费看久久久久| 免费大片黄手机在线观看| 亚洲精品久久午夜乱码| 亚洲久久久国产精品| 欧美日韩视频高清一区二区三区二| 91精品一卡2卡3卡4卡| 在线观看国产h片| 熟女av电影| 在线观看国产h片| 国产伦在线观看视频一区| 青青草视频在线视频观看| 欧美+日韩+精品| 色视频在线一区二区三区| 99国产精品免费福利视频| 午夜免费鲁丝| 日韩,欧美,国产一区二区三区| 国产黄片视频在线免费观看| 国产在线视频一区二区| av国产精品久久久久影院| 看免费成人av毛片| 一本一本综合久久| 在线天堂最新版资源| 亚洲欧美清纯卡通| 亚洲第一区二区三区不卡| 国产精品嫩草影院av在线观看| 国产成人精品久久久久久| 女性被躁到高潮视频| 交换朋友夫妻互换小说| 欧美日韩av久久| 久久热精品热| 午夜激情福利司机影院| 国产亚洲5aaaaa淫片| 妹子高潮喷水视频| 欧美日韩精品成人综合77777| 女的被弄到高潮叫床怎么办| 久久精品久久久久久噜噜老黄| 纯流量卡能插随身wifi吗| 最新中文字幕久久久久| 黑人巨大精品欧美一区二区蜜桃 | 青春草视频在线免费观看| 免费久久久久久久精品成人欧美视频 | 亚洲无线观看免费| 在线观看美女被高潮喷水网站| 亚洲在久久综合| 国产成人免费无遮挡视频| 欧美最新免费一区二区三区| 夜夜骑夜夜射夜夜干| 亚洲av日韩在线播放| 国产精品久久久久久精品电影小说| 久久免费观看电影| 99热这里只有是精品在线观看| 如日韩欧美国产精品一区二区三区 | 日韩不卡一区二区三区视频在线| 中文字幕免费在线视频6| 久久久久久伊人网av| 亚洲av成人精品一区久久| √禁漫天堂资源中文www| 国产毛片在线视频| 91在线精品国自产拍蜜月| 亚洲经典国产精华液单| 一本大道久久a久久精品| 成人毛片a级毛片在线播放| 秋霞在线观看毛片| 最黄视频免费看| 99久久人妻综合| 午夜激情久久久久久久| 国产伦精品一区二区三区四那| 成人漫画全彩无遮挡| 国产黄片美女视频| 国语对白做爰xxxⅹ性视频网站| 一级毛片黄色毛片免费观看视频| av不卡在线播放| 国产精品一区二区性色av| 在线免费观看不下载黄p国产| 91aial.com中文字幕在线观看| 三上悠亚av全集在线观看 | 精品99又大又爽又粗少妇毛片| 七月丁香在线播放| 精品一品国产午夜福利视频| av天堂久久9| 国产在线免费精品| 高清欧美精品videossex| 精品人妻偷拍中文字幕| 色视频www国产| 亚洲美女视频黄频|