• <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 ?

    College Basic Development Status Data Management System Based on Data Governance Framework

    2023-09-22 14:30:16LIULinlang劉琳瑯LULinzhen盧林珍WUQinghong吳清紅XUZhongqi徐中其
    關(guān)鍵詞:琳瑯

    LIU Linlang(劉琳瑯), LU Linzhen(盧林珍), WU Qinghong(吳清紅), XU Zhongqi(徐中其)

    Informatization Office, Donghua University, Shanghai 201620, China

    Abstract:In the era of big data, data application based on data governance has become an inevitable trend in the construction of smart campus in higher education. In this paper, a set of data governance system framework covering the whole life cycle of data suitable for higher education is proposed, and based on this, the ideas and methods of data governance are applied to the construction of data management system for the basic development status of faculties by combining the practice of data governance of Donghua University.It forms a closed-loop management of data in all aspects, such as collection, information feedback, and statistical analysis of the basic development status data of the college. While optimizing the management business of higher education, the system provides a scientific and reliable basis for precise decision-making and strategic development of higher education.

    Key words:big data; data governance; data quality; smart campus

    0 Introduction

    As the carrier of information, data is the most important foundation for constructing, using and maintaining various information systems. Under the macro environment of the current era of big data in higher education, high-quality basic data has become more and more valuable for the smooth running of teaching, research, and management in higher education, as well as for leadership decision support and better service for teachers and students.

    It has become an inevitable trend that data governance and data application construction in higher education are aimed at improving data quality, standardizing data usage, and supporting teaching and research applications and decision-making. In the construction of smart campuses, the framework of the data governance system is reasonably planned to promote the formation of “One Data, One Source” and an effective working mechanism of data integration and sharing. It scientifically constructs a data resource catalog and data traceability map at the higher education level to maximize the value of the data assets of higher education. All these have become issues that must be addressed in the reform and development of higher education.

    In this paper, we discuss the methods and solution ideas for implementing data governance in various fields, and plan a data governance system framework covering the whole life cycle of data for higher education. By monitoring and governing the whole process of data from generation to extinction, this framework can ensure the integrity, accuracy, consistency, and timeliness of business data in the whole process of collection, conversion, storage, and application in higher education. Therefore, it is possible to establish a data asset catalog and data governance system suitable for the characteristics of higher education. Ultimately, it can help higher education achieve global management of their data. At the same time, the ultimate purpose of data governance is to better serve the daily teaching, research, and management improvement needs of higher education. Therefore, by combining the data governance practices at Donghua University and focusing on the data problems faced in actual business management of higher education, we propose to apply the methodology and solution approach of data governance to the construction of a data management platform for basic development status of colleges in higher education.

    1 Overview of Data Governance Research

    1.1 Domestic and international data governance research developments

    By searching the relevant literature, we know that the understanding of data governance in foreign academia started in 2004[1], and the practice of data warehouse governance in enterprises has opened the curtain of data governance. In recent years, under the guidance of governance thinking, foreign academics have conducted a lot of theoretical research and practical exploration of data governance in enterprises, governments, hospitals, and universities. Researchers have developed some data governance frameworks and models and outlined the elements of data governance to guide the construction of governance frameworks[2].

    Subsequently, combining with management innovation, domestic scholars have promoted the concept of data governance from various perspectives. However, research on the methodology, technological platforms, and visualization presentation of data governance remains relatively weak. Most studies are still concentrated on theoretical exploration, with a noticeable lack of research on practical applications[3].

    1.2 Status of data governance in domestic higher education

    After more than ten years of development, although many higher education institutions in China have accumulated a large amount of business data, there are generally problems such as low data quality, large amounts of redundant data, low data availability and difficulty in data sharing among management departments, which have seriously restricted the improvement of the daily management and teaching level of higher education. Therefore, it is imperative to manage the data in higher education and improve the value of data. At present, some scholars in China have done relevant research in the field of data governance in higher education. Lietal.[4]proposed key aspects for data governance, such as grasping top-level design, system and standard preparation, key technology research and security construction. Zhao[5]discussed the path of data integration and its governance framework in higher education from the perspective of data integration. Lietal.[6]proposed the RACI model of data governance (RACI is a matrix model, where R=Responsible; A=Accountable; C=Consulted; I=Informed, which is used to specify the main objectives, relevant roles, governance activities and corresponding responsibilities of data governance) and introduced the implementation process of master data management and data quality assessment approach. Baoetal.[7]discussed the significance of data governance maturity assessment in their design of China Academic LibraryDG Framework (CALib) model for implementation and evaluation. By combining management innovation and technology practice, domestic scholars have introduced data governance ideas for higher education from different aspects.

    1.3 Current status of data governance applications in higher education

    The ultimate purpose of data governance in higher education is to help the construction of higher education’ smart campuses so that data can generate value and better serve all aspects of teaching, research, and management of higher education. At present, data governance results are mainly applied to building personal data centers for teachers and students, comprehensive data query services and other application services. However, when it comes to certain business scenarios in higher education, the application of data governance to meet the needs of rapid response to data application and management decisions is still in the exploratory stage.

    2 Data Governance System Architecture for Higher Education

    2.1 Ideas for data governance in higher education

    Data governance in higher education is the management of data as an asset throughout its life cycle, including strategy, planning, design, construction and application[8]. By monitoring and governing the whole process of data from creation to extinction, it realizes the unified management of data in the whole business domain, the whole data domain, and the whole time domain of higher education.

    2.1.1Coregoalofdatagovernanceinhighereducation

    Data governance in higher education is not something that can be achieved overnight. It should grasp the core objective of unified management of data assets to achieve “comprehensive collection”, “unified standard” and “interconnection” of data in higher education. It establishes a data asset catalog that meets the business characteristics of higher education, standardizes the definition of data resources, and realizes the sharing of data among organizations to help higher education improve the quality of data and ensure the safety of data, so as to better serve the daily teaching, research, and management of higher education[9].

    2.1.2Valueorientationofdatagovernanceinhighereducation

    Data governance in higher education can quickly respond to the demand for data applications in higher education and output data service value. It ensures the steady improvement of data output in quantity and quality, thus truly forming a vital and iterative optimized data ecology.

    2.2 Main construction content and system architecture of data governance in higher education

    Data governance in higher education refers to the process of data construction in the whole business domain (covering all business areas of higher education), the whole data domain (covering all data types), and the whole time domain (covering historical data). According to the business characteristics of higher education, in this paper, the data at the higher education level is divided into eight data subject domains, covering data assets such as “student, staff, finance, assets, teaching, research, administration, and public service”, as shown in Fig.1.

    Fig.1 Data subject domain delineation at the higher education level

    It completes the collection, storage, management, opening, and application of university-wide data through data governance. The main construction contents include the following parts.

    1) Management of information standards

    Information standard management includes the development of unified and standardized metadata standards, data exchange technical specifications, data classification and encoding standards, data quality standards,etc[10].

    2) Metadata management

    Metadata refers to data that describes other data, providing information about the attributes, structure, definition, and usage of the data. In the context of campus data asset management, metadata plays a crucial role. It helps establish a data map and data lineage in higher education and serves as a core driving force for data governance.

    3) Management of master data

    Master data management refers to the process of integrating and centralizing the most critical and urgently needed shared data (master data) from multiple business systems in higher education. It involves data cleansing, enrichment, and ultimately providing authoritative master data as data services to the required application systems[11].

    4) Data quality control

    Data quality control refers to the closed-loop management of data quality. It is based on data metrics, quality checks, problem detection and tracking to ensure the authenticity, accuracy, completeness and timeliness of source data.

    5) Comprehensive data link monitoring

    Data chain monitoring refers to the comprehensive management and automatic tracking of the life cycle and usage traces of data, in order to achieve chain data management and improve the overall level of data governance[12].

    6) Data security management

    Data security management provides centralized security governance for shared data by providing functions such as data desensitization, data classification, data authorization, data encryption, and data security watermarking to ensure the security of data[13].

    Based on the research on data governance in higher education, we have formulated a comprehensive data governance architecture suitable for the business characteristics of higher education, as shown in Fig.2.

    Fig.2 Data governance system architecture for higher education

    2.3 Implementation principles and methods of data governance in higher education

    Effective top-level planning and design are essential for data governance in higher education. Following the principles of “one data, one source” and “one source, multiple uses”, data governance should be purposefully conducted by aligning with the specific business scenarios of higher education. Here are several key points to follow for implementing data governance in higher education.

    1) Data governance in higher education should start from top-level design and establish a data governance office in order to guarantee the smooth implementation of various management rules, authority and responsibility relationships.

    2) The implementation of data governance in higher education requires the formulation of data management measures and relevant technical specifications to ensure the effective implementation of data governance.

    3) Data governance in higher education requires sufficient research in core departments, based on which thematic data assets are sorted out according to school business, and higher education-level code standards are built to create a “common language” for school data.

    4) Data governance in higher education requires building a data governance platform and integrating various sources and types of scattered data into a unified data governance platform in accordance with higher education-level data standards, quality rules, and security indicators.

    5) Data governance in higher education uses the data governance platform to sort out data lineage, draw a panoramic map of school data, and provide open data services with hierarchical authorization.

    6) Data governance in higher education improves the quality of source data through feedback from data applications while in turn promoting data governance, forming a closed loop of data governance.

    3 Construction of College Basic Development Status Data Management System Based on Data Governance Framework

    3.1 Current management situation of college basic development status data

    The relevant management departments of the university regularly collect the basic development status data of the college from all functional departments of the university every year, and the data involves personnel, academic affairs, research, finance, assets and other related data. The collection of this data involves many departments and takes a long time to collect completely. At the same time, the collection and management of college basic development status data is often carried out by administrative personnel. They are busy with operational tasks and tend to rely on traditional manual or spreadsheet methods for data collection and analysis. Due to the wide scope of college basic development status data, the complexity of the data, and the lack of uniform data standards, the use of traditional offline data collection methods and simple data analysis methods not only brings a huge workload to administrators but also makes it difficult for them to comprehensively and objectively analyze the implied business logic relationships behind each data. It also tends to cause problems such as repeated data collation work, low efficiency, and inaccurate information mastery. Meanwhile, the insufficient use of data feedback by administrators can also result in the use of basic development status data not being fully utilized. Therefore, there is an urgent need to build an information system to assist the management to view the progress of data filling in real time and improve the efficiency of data collection, as well as to further improve the accuracy of data filling with the help of campus-level data assets[14].

    Based on the above research on the data governance systems of higher education and the analysis of the current situation of the basic development status data management of colleges, we believe that the college basic development status data management system should be built on the basis of the data governance framework system. That is, the concepts and methods in the data governance system such as data collection, data standard management, master data model, data quality management, data full chain feedback and data analysis should be applied to all aspects of the basic development status data management of colleges[12]. This can be of great help to form the closed-loop management of the basic development status data and improve the level of data information management. and at the same time, help to provide the most real and effective scientific basis for the optimization and strategic development of the teaching management business of the college.

    3.2 Building college basic development status data management system based on data governance framework

    The ultimate goal of data governance is to make data reflect value. Therefore, based on the study of data governance system, we built a college basic development status data management system, which includes modules for data filling, review process, information feedback, analysis and statistics, forming a closed-loop management of the basic development status data of the college. Based on the research outcomes of data governance, we have constructed a service-oriented and data-centric college basic development status data visualization dashboard. The aim is to integrate data analysis support into the management processes of the college, enabling school leaders and administrators to have a comprehensive understanding of the basic development status of the college. It also helps administrators to accurately grasp the problems in the development of the college and introduce corresponding improvement initiatives.

    3.2.1Systemconstructionprinciples

    During the design of the system, we followed several key principles.

    1) Data filling

    The system makes full use of the results of data governance to assist in the filling of basic development status data. When filling in the basic status data of the college, it is required to follow the principle of consistent data authority and responsibility to avoid multiple maintenance, redundancy, conflict, and loss of data filling. Using the governed data, the system realizes automatic data filling as much as possible.

    2) Filling progress

    Through the system, managers can view the progress of data filling by each department in real time and supervise to improve the efficiency of data collection.

    3) Permission control

    The system has set up filling authority, submitting authority, and reviewing authority for departmental personnel to meet the authority and responsibility requirements of data filling.

    4) Process control

    The system controls the entire process of data filling through various steps such as filler, submitter, functional department review, and school management review.

    5) Feedback on data

    The system can trace various problematic data in data filling with the help of data lineage in data governance and realize the guideline of “one authoritative data source”.

    6) Statistical analysis of data

    The system has a statistical summary function of the filled data, which can show the filled data to the manager visually from different dimensions.

    3.2.2Systemarchitecture

    The structure of the college basic development status data management system based on the data governance framework is shown in Fig.3.

    Fig.3 System architecture of college basic development status data management

    3.2.3Mainservicesofsystem

    1) Filling out basic development status data of college

    The collection of the basic development status data of the college involves various functional departments and colleges at all levels, and the data sources are of various calibers and types. Data collection and statistics based on different calibers are prone to problems such as poor data consistency, difficult identification of effective data, and difficulties in data sharing and docking. For the data traditionally collected offline, we use the data governance platform to collect the basic development status data of the college online and share the data in a graded and classified manner. For the data with an information system, the results of data governance can be used to automatically fill in the data with clear data responsibility subjects and report them after confirmation by users, which greatly reduces the workload of data filling. The content of the college basic development status data collection involves the college’s staff size, financial investment, talent team construction, student situation, scientific research awards, etc. The construction idea of the college basic development status data filling service is shown in Fig.4.

    Fig.4 Construction idea of filling service

    2) College basic development status data audit

    As shown in Fig.5, managers logging into the filling system are able to view the filling progress of each functional department and their respective filling status (unfilled, in the process of filling, under review, completed).

    3) Feedback service for basic development status data of college

    For the data with problems in filling in the basic development status of the college, we can rely on the data lineage in the data governance system to trace the source of the problem, and use the full data link management in the data governance system to provide convenient, fast, and accurate information feedback on the problematic data. This not only improves the accuracy of data filling but also forms a closed-loop management of the quality of the basic data filled, as shown in Fig.6.

    4) Statistical analysis of college basic development status data

    After the basic development status data of the college was filled in, we constructed data analysis models for the relevant topics. Using intelligent data analysis tools and agile report development tools, we performed multidimensional and multilevel analysis and presentation on the filled-in data. We present dynamic data on different topics such as discipline and major construction, talent cultivation, international cooperation and exchange, faculty construction, teaching conditions and investment, and scientific research to decision makers and managers at the college level in the form of a big screen for intelligent data analysis. The system also provides graphical and textual data analysis result reports on relevant topics. The system supports flexible expansion and configuration of Key Performance Indicators (KPI)-related data statistics according to the leadership’s concerns and changes in stage work priorities. The big screen of intelligent data analysis also supports drill-down and detailed query functions of key indicators.

    Since the data management system based on data governance was put online at Donghua University, it has assisted 15 colleges and departments in completing online data filing for 21 statements, 28 detailed tables, and 61 observation indicators. The system automatically generates the annual basic development status report of the college after the filled-in data has passed the audit. With the support of the system, the collection and summarization of the basic development status data of colleges has been greatly shortened from two months to two weeks, which has greatly improved the efficiency of filling, reviewing and summarizing the basic development status data of colleges.

    4 Conclusions

    Under the data governance framework based on the business characteristics of higher education, we divide the data generated in daily teaching, scientific research, and management into different thematic data domains, and apply data governance methods and concepts to manage the entire process and lifecycle of school business data, thereby precipitating loose business data into scientific and effective school data assets. On this basis, we have built a college basic development status data management system. In the construction of smart campus, the framework and practical methods proposed in this paper have certain reference value in rapidly transforming school data assets into data services and quickly responding to school data application needs.

    1) Under the framework of data governance in higher education, we have achieved unified management of data by monitoring and governing the entire lifecycle of data from creation to extinction. This ensures the integrity, accuracy, consistency, and timeliness of the school’s business data throughout the processes of collection, transformation, storage, and application. It also helps establish the formation of “one data, one source” and ensures the authority and consistency of core master data in higher education.

    2) Based on the data governance framework of higher education, the college basic development status data management platform can make full use of the results of data governance, integrate data of existing business systems on campus and offline form data, and provide data support for college basic development status data filling. It alleviates the pain point of repeated filling and greatly reduces the work intensity of data filling.

    3) For the collection of college basic development status data, our system has implemented a complete process of data entry, auditing, display, and analysis. We have innovated a new model for transitioning the collection of college basic development status data from offline manual methods to online data filling. This enables intelligent data collection, management, and application throughout the entire value chain, achieving the goal of “more running with data, less running with teachers and students”.

    4) Through online data filling and analysis, our system has helped schools sort out core data on college basic development status, enabling management departments to comprehensively grasp school-level data assets related to filling data. This has also improved the scientific accuracy of school decision-making.

    5) The college basic development status data management system makes full use of the results of data governance. It also verifies the accuracy, standardization, and consistency of the data through the filling and application of basic development status data. In turn, it also tests the effectiveness and reasonableness of the master plan for data governance in higher education.

    猜你喜歡
    琳瑯
    十年——風(fēng)雨不琳瑯
    海峽姐妹(2020年6期)2020-07-25 01:26:16
    從此不再芬梨道觀光
    花火B(yǎng)(2018年10期)2018-01-19 11:36:18
    非禮勿吸
    桃之夭夭B(2017年11期)2018-01-02 08:30:09
    婚姻里要親密也要距離
    藍盾(2017年11期)2017-12-25 21:50:16
    婚姻里要親密也要距離
    婦女(2017年9期)2017-09-12 22:20:47
    天祿琳瑯文具禮盒套裝
    紫禁城(2017年6期)2017-08-07 09:22:52
    我會想念你
    少年文藝(2017年2期)2017-02-20 18:12:08
    夢別金陵處
    飛魔幻A(2015年4期)2015-05-14 09:46:34
    葉德輝《郋園讀書志》征引《天祿琳瑯書目》及其《后編》初探
    天一閣文叢(2013年1期)2013-11-06 10:01:20
    和“現(xiàn)任”聊“前任”,前女友“撒嬌支付”死得冤
    丝袜美腿在线中文| 精品一区二区免费观看| 久久婷婷人人爽人人干人人爱| 九九久久精品国产亚洲av麻豆| 久久久精品欧美日韩精品| 亚洲av第一区精品v没综合| 99九九线精品视频在线观看视频| 国产精品人妻久久久影院| 国产真实伦视频高清在线观看 | 亚洲欧美日韩高清专用| 国产美女午夜福利| 99热这里只有是精品在线观看| 久9热在线精品视频| 最近视频中文字幕2019在线8| 久久99热这里只有精品18| 搡女人真爽免费视频火全软件 | av中文乱码字幕在线| 国产成人福利小说| 在线免费观看不下载黄p国产 | 一级毛片久久久久久久久女| 欧美色欧美亚洲另类二区| 免费一级毛片在线播放高清视频| 欧美+亚洲+日韩+国产| 亚洲av成人av| 国产精品美女特级片免费视频播放器| 在线国产一区二区在线| 午夜影院日韩av| 久久久久久大精品| 最新在线观看一区二区三区| 国产成人一区二区在线| 精品久久久久久久久亚洲 | 国产老妇女一区| 久久亚洲精品不卡| 久久久久国内视频| 黄色丝袜av网址大全| 看十八女毛片水多多多| 久久精品夜夜夜夜夜久久蜜豆| 久久6这里有精品| 成人二区视频| 网址你懂的国产日韩在线| eeuss影院久久| 日韩欧美免费精品| 中文字幕免费在线视频6| 亚洲va日本ⅴa欧美va伊人久久| 村上凉子中文字幕在线| 亚洲av熟女| 久久草成人影院| 中文资源天堂在线| 五月伊人婷婷丁香| 亚洲av熟女| 欧美极品一区二区三区四区| 天天一区二区日本电影三级| 久久精品国产亚洲av香蕉五月| 欧美成人性av电影在线观看| 欧洲精品卡2卡3卡4卡5卡区| 成人特级黄色片久久久久久久| 日日撸夜夜添| 男人和女人高潮做爰伦理| 久久久久精品国产欧美久久久| 欧美最新免费一区二区三区| 亚洲精品色激情综合| videossex国产| 内地一区二区视频在线| av.在线天堂| 丰满人妻一区二区三区视频av| 97热精品久久久久久| 一个人观看的视频www高清免费观看| 又爽又黄无遮挡网站| 亚洲性久久影院| 村上凉子中文字幕在线| 嫩草影院新地址| 国产精品伦人一区二区| 免费av不卡在线播放| 久久这里只有精品中国| 免费观看的影片在线观看| 最近最新中文字幕大全电影3| 婷婷亚洲欧美| 美女黄网站色视频| 国产麻豆成人av免费视频| 麻豆一二三区av精品| 日韩精品青青久久久久久| 亚洲无线在线观看| 特大巨黑吊av在线直播| 99久久九九国产精品国产免费| 少妇被粗大猛烈的视频| 久久久久久久精品吃奶| 国产又黄又爽又无遮挡在线| 日韩人妻高清精品专区| 在线观看美女被高潮喷水网站| 国产精品伦人一区二区| 国产黄片美女视频| 久久精品影院6| 日韩 亚洲 欧美在线| 人人妻人人看人人澡| 精品人妻1区二区| 超碰av人人做人人爽久久| 久久久国产成人精品二区| 熟妇人妻久久中文字幕3abv| 男女下面进入的视频免费午夜| 亚洲精品影视一区二区三区av| 在线播放国产精品三级| 日本免费一区二区三区高清不卡| 搡老妇女老女人老熟妇| 国产大屁股一区二区在线视频| 国产熟女欧美一区二区| 成人特级av手机在线观看| xxxwww97欧美| 变态另类成人亚洲欧美熟女| 床上黄色一级片| 热99re8久久精品国产| 18+在线观看网站| 久久人人精品亚洲av| 男女之事视频高清在线观看| 老师上课跳d突然被开到最大视频| 日本黄色视频三级网站网址| 最近视频中文字幕2019在线8| 男人狂女人下面高潮的视频| 黄色一级大片看看| 精品一区二区免费观看| 国产精品美女特级片免费视频播放器| 国内精品一区二区在线观看| 亚洲熟妇中文字幕五十中出| 久久精品国产99精品国产亚洲性色| 日韩,欧美,国产一区二区三区 | 淫妇啪啪啪对白视频| 91久久精品电影网| 午夜亚洲福利在线播放| 国产又黄又爽又无遮挡在线| 亚洲真实伦在线观看| 日本免费a在线| 99久国产av精品| 免费无遮挡裸体视频| 免费av毛片视频| 久9热在线精品视频| 国产亚洲精品综合一区在线观看| 18禁黄网站禁片免费观看直播| 亚洲精华国产精华精| av在线老鸭窝| 日韩欧美精品v在线| 亚洲精品影视一区二区三区av| 又黄又爽又刺激的免费视频.| 999久久久精品免费观看国产| 91久久精品国产一区二区三区| 又爽又黄无遮挡网站| 国产精品98久久久久久宅男小说| 有码 亚洲区| 亚洲成a人片在线一区二区| 少妇高潮的动态图| 变态另类丝袜制服| 老司机福利观看| 日韩中文字幕欧美一区二区| 欧美一区二区亚洲| 最近最新中文字幕大全电影3| 日韩一本色道免费dvd| 免费观看人在逋| 亚洲精品乱码久久久v下载方式| 国产精品久久久久久久电影| a级毛片免费高清观看在线播放| 男人狂女人下面高潮的视频| 全区人妻精品视频| 一个人免费在线观看电影| 亚洲图色成人| 亚洲精品在线观看二区| 啪啪无遮挡十八禁网站| 亚洲三级黄色毛片| 少妇被粗大猛烈的视频| 亚洲成人久久爱视频| 欧美激情国产日韩精品一区| 欧美黑人欧美精品刺激| 国产精品美女特级片免费视频播放器| 国产黄片美女视频| 亚洲国产欧美人成| 级片在线观看| ponron亚洲| 男女之事视频高清在线观看| 欧美潮喷喷水| 热99在线观看视频| 午夜精品久久久久久毛片777| 91在线观看av| 亚洲美女视频黄频| 久久精品国产亚洲网站| 国产午夜福利久久久久久| 亚洲无线在线观看| 亚洲天堂国产精品一区在线| 久久人人精品亚洲av| videossex国产| 国产在线男女| 久久中文看片网| 美女 人体艺术 gogo| 久久久久国产精品人妻aⅴ院| 久久久久久久久久黄片| 婷婷丁香在线五月| 亚洲专区中文字幕在线| 日韩欧美精品免费久久| 亚洲无线观看免费| 少妇的逼好多水| 男人狂女人下面高潮的视频| 国内少妇人妻偷人精品xxx网站| 一夜夜www| 久久久精品大字幕| 婷婷六月久久综合丁香| 在线看三级毛片| 国产精品1区2区在线观看.| 99在线人妻在线中文字幕| 女的被弄到高潮叫床怎么办 | 麻豆精品久久久久久蜜桃| 国产精品1区2区在线观看.| 久久久久久久午夜电影| 久久久久久久久久久丰满 | 美女cb高潮喷水在线观看| 久久久久免费精品人妻一区二区| 亚洲内射少妇av| 成人亚洲精品av一区二区| 欧美人与善性xxx| 久久久久久久久大av| 97超级碰碰碰精品色视频在线观看| 变态另类成人亚洲欧美熟女| 日日干狠狠操夜夜爽| 精品久久久久久久久久免费视频| 午夜福利欧美成人| 日本黄色片子视频| 大型黄色视频在线免费观看| 精品久久久久久久末码| 亚洲va日本ⅴa欧美va伊人久久| 长腿黑丝高跟| 色尼玛亚洲综合影院| 1000部很黄的大片| 久久亚洲真实| 尾随美女入室| 亚洲国产欧洲综合997久久,| 亚洲久久久久久中文字幕| 又粗又爽又猛毛片免费看| 一边摸一边抽搐一进一小说| 熟妇人妻久久中文字幕3abv| 91久久精品国产一区二区三区| 精品久久久久久久久久久久久| av中文乱码字幕在线| 国产精华一区二区三区| 亚洲色图av天堂| 国国产精品蜜臀av免费| 男女那种视频在线观看| 少妇丰满av| 可以在线观看的亚洲视频| 白带黄色成豆腐渣| 一级毛片久久久久久久久女| 人人妻人人看人人澡| 国产精品免费一区二区三区在线| 亚洲av电影不卡..在线观看| 国产三级中文精品| 好男人在线观看高清免费视频| 婷婷亚洲欧美| 日本爱情动作片www.在线观看 | 又粗又爽又猛毛片免费看| 国模一区二区三区四区视频| 亚洲最大成人中文| 免费大片18禁| 午夜日韩欧美国产| 国产一区二区在线av高清观看| 精品久久久久久久久久久久久| 精品久久久久久,| 99精品久久久久人妻精品| 免费无遮挡裸体视频| 18禁在线播放成人免费| 免费一级毛片在线播放高清视频| 国产亚洲91精品色在线| 久久久久久久亚洲中文字幕| 国产精品一及| 色av中文字幕| 91av网一区二区| 亚洲人与动物交配视频| 亚洲国产高清在线一区二区三| 精品免费久久久久久久清纯| 麻豆一二三区av精品| 免费不卡的大黄色大毛片视频在线观看 | 亚洲黑人精品在线| 国产精品99久久久久久久久| 亚洲最大成人av| 精品久久久久久久久久免费视频| 国产私拍福利视频在线观看| 亚洲精品乱码久久久v下载方式| 免费看a级黄色片| 国产真实乱freesex| 精品不卡国产一区二区三区| 毛片一级片免费看久久久久 | 国产成人福利小说| 国内精品久久久久精免费| 国内揄拍国产精品人妻在线| 中文字幕免费在线视频6| 自拍偷自拍亚洲精品老妇| 日韩亚洲欧美综合| 亚洲国产高清在线一区二区三| 欧美在线一区亚洲| 成人国产综合亚洲| 狠狠狠狠99中文字幕| 赤兔流量卡办理| 国产成年人精品一区二区| 成熟少妇高潮喷水视频| 日韩中字成人| 成人二区视频| 精品人妻1区二区| 成人av在线播放网站| 在线a可以看的网站| 欧美zozozo另类| 韩国av一区二区三区四区| 国产一区二区在线av高清观看| 国产高清三级在线| 在线免费观看的www视频| 精品久久久久久成人av| 午夜a级毛片| 成人鲁丝片一二三区免费| 嫩草影视91久久| 亚洲欧美日韩高清专用| 1000部很黄的大片| 国产亚洲精品久久久com| 日韩,欧美,国产一区二区三区 | 变态另类成人亚洲欧美熟女| 国产精品久久视频播放| 国产高清不卡午夜福利| 最近最新免费中文字幕在线| 亚洲av二区三区四区| 精品免费久久久久久久清纯| 亚洲va日本ⅴa欧美va伊人久久| 黄色视频,在线免费观看| 精品久久久久久久人妻蜜臀av| 天堂动漫精品| 免费在线观看日本一区| 精品乱码久久久久久99久播| 真实男女啪啪啪动态图| 五月玫瑰六月丁香| 久久久久久久亚洲中文字幕| 97超视频在线观看视频| 天堂网av新在线| 国产精品国产三级国产av玫瑰| 久久久久久久久久久丰满 | 欧美3d第一页| 色在线成人网| 美女高潮的动态| 亚洲精品亚洲一区二区| 无人区码免费观看不卡| 欧美+亚洲+日韩+国产| 人妻少妇偷人精品九色| 国产免费一级a男人的天堂| 亚洲四区av| 国产熟女欧美一区二区| 久久九九热精品免费| 一区二区三区激情视频| 久久国内精品自在自线图片| 国内精品美女久久久久久| 免费观看的影片在线观看| 日韩中文字幕欧美一区二区| 男人和女人高潮做爰伦理| 欧美三级亚洲精品| 国产欧美日韩一区二区精品| 久久久久久九九精品二区国产| 久9热在线精品视频| 人妻夜夜爽99麻豆av| 国产精品嫩草影院av在线观看 | 亚洲精品影视一区二区三区av| 成人国产综合亚洲| 国产精品久久视频播放| 在线天堂最新版资源| 99riav亚洲国产免费| 三级男女做爰猛烈吃奶摸视频| 亚洲精品影视一区二区三区av| 网址你懂的国产日韩在线| 免费搜索国产男女视频| 欧美日韩综合久久久久久 | 内射极品少妇av片p| 18禁在线播放成人免费| 免费看光身美女| 日本免费a在线| 内射极品少妇av片p| 国产伦人伦偷精品视频| 日韩,欧美,国产一区二区三区 | 亚洲第一区二区三区不卡| 给我免费播放毛片高清在线观看| 999久久久精品免费观看国产| 国产亚洲精品久久久com| 永久网站在线| 久99久视频精品免费| 日本免费一区二区三区高清不卡| 亚洲人成伊人成综合网2020| 国产精品福利在线免费观看| 老司机福利观看| 久久精品久久久久久噜噜老黄 | 久久中文看片网| 国产色爽女视频免费观看| 美女高潮喷水抽搐中文字幕| 窝窝影院91人妻| 亚洲内射少妇av| 天堂av国产一区二区熟女人妻| 国产黄a三级三级三级人| 成人欧美大片| 极品教师在线免费播放| 免费看光身美女| 欧美激情在线99| 国产毛片a区久久久久| 丝袜美腿在线中文| 国产熟女欧美一区二区| 亚洲国产色片| 免费看a级黄色片| 欧美3d第一页| 国产高清激情床上av| 日韩欧美国产在线观看| 久久精品国产清高在天天线| 亚洲欧美日韩高清在线视频| 欧美性猛交黑人性爽| 中文资源天堂在线| 69av精品久久久久久| 波野结衣二区三区在线| 国产精华一区二区三区| 亚洲 国产 在线| 非洲黑人性xxxx精品又粗又长| 亚洲av中文av极速乱 | 黄色女人牲交| 黄色欧美视频在线观看| 亚洲av日韩精品久久久久久密| 国产亚洲精品综合一区在线观看| 亚洲七黄色美女视频| 亚洲经典国产精华液单| 久久午夜亚洲精品久久| 久久久午夜欧美精品| 色视频www国产| 五月伊人婷婷丁香| 中文在线观看免费www的网站| 97超视频在线观看视频| 午夜视频国产福利| 亚洲av一区综合| 国内精品一区二区在线观看| 亚洲精品久久国产高清桃花| 精品一区二区三区人妻视频| x7x7x7水蜜桃| 搡老岳熟女国产| 久久精品国产亚洲av天美| 美女黄网站色视频| 波多野结衣巨乳人妻| 亚洲av一区综合| 亚洲色图av天堂| 亚洲欧美清纯卡通| 欧美一区二区精品小视频在线| 精品无人区乱码1区二区| 深夜a级毛片| 久久精品国产亚洲av天美| 亚洲av美国av| 人人妻人人看人人澡| 一夜夜www| av天堂中文字幕网| 成人性生交大片免费视频hd| 亚洲真实伦在线观看| 老司机福利观看| 国产91精品成人一区二区三区| 欧美最黄视频在线播放免费| 我要搜黄色片| 麻豆成人av在线观看| 日韩亚洲欧美综合| 国产精品福利在线免费观看| 最新中文字幕久久久久| 很黄的视频免费| 国产久久久一区二区三区| 中文资源天堂在线| АⅤ资源中文在线天堂| 国产探花在线观看一区二区| 国产精品一区二区三区四区久久| 国产又黄又爽又无遮挡在线| 国产精品,欧美在线| 欧美一级a爱片免费观看看| 天堂√8在线中文| 国产伦精品一区二区三区四那| 亚洲av日韩精品久久久久久密| 亚洲精华国产精华液的使用体验 | 淫秽高清视频在线观看| 日韩国内少妇激情av| 色播亚洲综合网| 欧美区成人在线视频| 最近在线观看免费完整版| 国产三级中文精品| 国产精品久久久久久久久免| 日韩中字成人| 国内久久婷婷六月综合欲色啪| 亚洲精品色激情综合| 亚洲av中文字字幕乱码综合| 狠狠狠狠99中文字幕| 小说图片视频综合网站| 欧美色视频一区免费| 中文字幕av成人在线电影| 啦啦啦啦在线视频资源| 搡女人真爽免费视频火全软件 | 国产激情偷乱视频一区二区| 舔av片在线| 欧美精品啪啪一区二区三区| 欧美成人a在线观看| 亚洲第一区二区三区不卡| 日韩 亚洲 欧美在线| 日韩欧美精品v在线| 亚洲avbb在线观看| 国产成年人精品一区二区| 国产激情偷乱视频一区二区| 日日干狠狠操夜夜爽| 99视频精品全部免费 在线| 久9热在线精品视频| 国产精品福利在线免费观看| 国产久久久一区二区三区| 国产国拍精品亚洲av在线观看| 亚洲午夜理论影院| 性插视频无遮挡在线免费观看| 999久久久精品免费观看国产| 午夜激情福利司机影院| 欧美bdsm另类| 天堂网av新在线| 最近视频中文字幕2019在线8| 国产黄片美女视频| 简卡轻食公司| 深夜a级毛片| 国产av一区在线观看免费| 亚洲精品粉嫩美女一区| 少妇熟女aⅴ在线视频| a在线观看视频网站| 亚洲 国产 在线| 精品日产1卡2卡| 97超视频在线观看视频| 在线观看舔阴道视频| 久久亚洲真实| ponron亚洲| 91麻豆av在线| 亚洲av免费在线观看| 国产精品人妻久久久久久| 少妇猛男粗大的猛烈进出视频 | 婷婷亚洲欧美| 男插女下体视频免费在线播放| 欧美+亚洲+日韩+国产| 亚洲avbb在线观看| 国产一区二区激情短视频| 免费看光身美女| 国产亚洲av嫩草精品影院| 久久欧美精品欧美久久欧美| 内地一区二区视频在线| 有码 亚洲区| 看免费成人av毛片| 久9热在线精品视频| 亚洲精品成人久久久久久| 国产又黄又爽又无遮挡在线| 国产精品精品国产色婷婷| 三级男女做爰猛烈吃奶摸视频| 热99re8久久精品国产| 在线观看一区二区三区| 欧美潮喷喷水| 亚洲av熟女| 身体一侧抽搐| 男人狂女人下面高潮的视频| 精品午夜福利在线看| 成人永久免费在线观看视频| 一本久久中文字幕| 亚洲乱码一区二区免费版| 午夜久久久久精精品| 国产精品爽爽va在线观看网站| 网址你懂的国产日韩在线| 乱系列少妇在线播放| 在线观看一区二区三区| 免费一级毛片在线播放高清视频| 亚洲欧美日韩卡通动漫| 两个人的视频大全免费| 极品教师在线视频| 欧美精品国产亚洲| 不卡视频在线观看欧美| 好男人在线观看高清免费视频| 91av网一区二区| 99热精品在线国产| 亚洲国产精品成人综合色| 国产高清视频在线播放一区| 老司机福利观看| 国产av不卡久久| 国产毛片a区久久久久| 成人av在线播放网站| 久久精品国产自在天天线| 欧美潮喷喷水| 国产精品久久视频播放| 亚洲精品在线观看二区| 乱码一卡2卡4卡精品| 亚洲av一区综合| 身体一侧抽搐| 蜜桃久久精品国产亚洲av| 九九热线精品视视频播放| .国产精品久久| 国产中年淑女户外野战色| 婷婷六月久久综合丁香| 中文字幕av在线有码专区| 欧美xxxx黑人xx丫x性爽| 久久欧美精品欧美久久欧美| av在线老鸭窝| 一夜夜www| 我的老师免费观看完整版| 色av中文字幕| 亚洲av日韩精品久久久久久密| 小说图片视频综合网站| 男人狂女人下面高潮的视频| 麻豆国产97在线/欧美| 网址你懂的国产日韩在线| 欧美色欧美亚洲另类二区| 日韩欧美三级三区| 免费看光身美女| bbb黄色大片| 国产精品久久久久久精品电影| 亚洲国产日韩欧美精品在线观看| 午夜免费激情av| 成人三级黄色视频| 美女被艹到高潮喷水动态| 日本 欧美在线| 人人妻人人澡欧美一区二区| av在线老鸭窝| 久久久久久久精品吃奶| 嫩草影视91久久| 91麻豆av在线| 黄片wwwwww| 中出人妻视频一区二区| 在线a可以看的网站|