检索结果-南通市图书馆

Analysis of Pressure Forcings for the Vertical Turbulent Fluxes in the Convective Boundary Layer at Gray Zone Resolutions

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Meteorological Research 2023年第6期37卷 841-854页

作者： yahua wang Xiaoping CHENG Jianfang FEI Bowen ZHOU College of Meteorology and Oceanography National University of Defense TechnologyChangsha410005China Key Laboratory of Electro-Optical Countermeasures Test and Evaluation Technology Luoyang471000China Key Laboratory for Mesoscale Severe Weather Ministry of EducationSchool of Atmospheric SciencesNanjing UniversityNanjing210000China

At kilometer and sub-kilometer resolutions,known as the numerical gray zone for boundary layer turbulence,the atmospheric boundary layer turbulence becomes partially resolved and partially subgrid-scale(SGS) in a numerical model,thus requiring scale-adaptive turbulence *** schemes are often built by modifying the existing parameterizations,either the planetary boundary layer(PBL) schemes or the large-eddy simulation(LES) closures,to produce the right SGS turbulent fluxes at gray zone ***,the underlying forcings responsible for the changes in the vertical turbulent fluxes are largely ignored in these *** study follows the original approach of Wyngaard(2004) and analyzes the turbulent buoyancy and momentum flux budgets,to gain a better understanding of the variations of flux forcings at gray zone *** investigation focuses on the pressure covariance term,which is one of the most dominant terms in the budget *** using the coarse-grained LES of a dry convective boundary layer(CBL) case as reference,two widely-used pressure covariance models are evaluated and optimized across the gray zone resolution *** optimized linear model is further evaluated a priori against another dry CBL case with a different bulk stability,and a shallow-cumulus-topped boundary layer *** model applies well to both cases,and notably shows good performance for the cloud *** on the analysis of the flux forcings and the optimized pressure model,a scale-adaptive turbulence model for the gray zone is derived from the steady-state flux budgets.

关键词： convective boundary layer gray zone flux budget pressure covariance turbulence parameterization

Anaerobic oxidation of arsenite by bioreduced nontronite

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2021年第12期33卷 21-27页

作者： Ziwang Zhao Ying Meng yahua wang Leiming Lin Fuyu Xie Fubo Luan Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

The redox state of arsenic controls its toxicity and mobility in the subsurface environment. Understanding the redox reactions of arsenic is particularly important for addressing its environmental behavior. Clay minerals are commonly found in soils and sediments, which are an important host for arsenic. However, limited information is known about the redox reactions between arsenic and structural Fe in clay minerals. In this study, the redox reactions between As(Ⅲ)/As(Ⅴ) and structural Fe in nontronite NAu-2 were investigated in anaerobic batch experiments. No oxidation of As(Ⅲ) was observed by the native Fe(Ⅲ)-NAu-2. Interestingly, anaerobic oxidation of As(Ⅲ) to As(Ⅴ) occurred after Fe(Ⅲ)-NAu-2 was bioreduced. Furthermore, anaerobic oxidization of As(Ⅲ) by bioreduced NAu-2 was significantly promoted by increasing Fe(Ⅲ)-NAu-2 reduction extent and initial As(Ⅲ) concentrations. Bioreduction of Fe(Ⅲ)-NAu-2 generated reactive Fe(Ⅲ)-O-Fe(Ⅱ) moieties at clay mineral edge sites. Anaerobic oxidation of As(Ⅲ) was attributed to the strong oxidation activity of the structural Fe(Ⅲ) within the Fe(Ⅲ)-O-Fe(Ⅱ) moieties. Our results provide a potential explanation for the presence of As(Ⅴ) in the anaerobic subsurface environment. Our findings also highlight that clay minerals can play an important role in controlling the redox state of arsenic in the natural environment.

关键词： Bioreduction Nontronite NAu-2 Arsenic Redox reactions Clay mineral

Multiple Forces Driving China's Economic Development:A New Analytic Framework

在线全文

学校读者我要写书评

暂无评论

China & World Economy 2007年第3期15卷 103-120页

作者： yahua wang Angang Hu Assistant Professor at the Public Policy and Management School Tsinghua University Professor and Director of the Center for China Studies Tsingha University

Based on economic growth theory and the World Bank＇s analytical framework relating to the quality of growth, the present paper constructs a framework that encompasses physical, international, human, natural and knowledge capital to synthetically interpret economic development. After defining the five types of capital and total capital, we analyze the dynamic changes of these types of capital in China and in other countries. The results show that since China＇ s reform and opening up, knowledge, international, human and physical capital have grown rapidly, with speeds of growth higher than that of economic growth. As the five types of capital have all increased at varying paces, the savings level of total capital in China has quadrupled in 25 years and overtook that of the USA in the 1990s. The changes in the five types of capital and total capital reveal that there are progressively multiple driving forces behind China＇ s rapid economic development. Implications for China＇s long-term economic development are thereby raised.

关键词： China's economic development five types of capital quality of growth total capital

Identification and construction of a novel biomimetic delivery system of paclitaxel and its targeting therapy for cancer

在线全文

学校读者我要写书评

暂无评论

Signal Transduction and Targeted Therapy 2021年第2期6卷 245-247页

作者： Xue wang Wanwei Zheng Qing Shen yahua wang Yujen Tseng Zhongguang Luo Xiaoyou wang Lei Shi Chong Li Jie Liu Medical Research Institute College of Pharmaceutical SciencesSouthwest UniversityChongqing 400715China Institute of Digestive Diseases Huashan HospitalFudan UniversityShanghai 200041China Hangzhou YITU Healthcare Technology Co LtdHangzhou 310012China State Key Laboratory of Esophageal Cancer Prevention&Treatment Zhengzhou UniversityZhengzhou 450052China Xiamen Ginposome Pharmaceutical Co LtdXiamen 361026China

Dear Editor,Paclitaxel(PTX)is among the frst-line therapeutic agents against diverse ***,problems still exist concerning its poor water-solubility,multidrug resistance,lack of specific targeting ability and severe toxic effects,and these issues are far from fully resolved despite the various PTX formulations available *** market,*** gold standard,PTX albumin nanoparticles Abraxane I and PTX liposomes *** studies that try to solve the multiple problems faced by chemotherapy drug delivery,however,fell into the prevailing trap of overcomplicated formulation design which sacrifices the *** better reconcile this paradox,a novel glycosylated liposomal PTX was designed,inspired by the cytomembrane glycosyls with important roles *** both membrane structure and physiological functions,3 such as enhan-cing membrane stability,evading immunological clearance,and recognizing corresponding ***,as natural amphiphilic molecules,are structurally similar to cholesterol,contain glycosyl moieties,and are easily obtainable.

关键词： chemotherapy formulation prevailing

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

劳动力外流、农村集体行动与乡村振兴

清华大学学报（哲学社会科学版） 2022年第3期37卷 173-187,219页

作者：王亚华苏毅清舒全峰清华大学公共管理学院清华大学中国农村研究院北京100084 广西大学公共管理学院南宁530004

中国实施乡村振兴战略,必须高度重视因大规模劳动力外流所导致的农村集体行动能力下降问题。基于国际集体行动理论和社会生态系统(SES)框架,以农村灌溉集体行动为例,实证分析了劳动力外流影响农村集体行动的深层机制,研究发现:劳动力外... 详细信息

中国实施乡村振兴战略,必须高度重视因大规模劳动力外流所导致的农村集体行动能力下降问题。基于国际集体行动理论和社会生态系统(SES)框架,以农村灌溉集体行动为例,实证分析了劳动力外流影响农村集体行动的深层机制,研究发现:劳动力外流经由抽离村庄领导力、破坏村民积累社会资本、削弱农民的村庄归属感,以及降低农民对农业资源的依赖性等中介机制,对农村集体行动能力产生综合性负面影响;但是,劳动力外流对村庄的领导力、村民间的社会资本、村民对村庄的归属感,以及农民对农业资源的依赖性所产生的负面影响,理论上可以通过政策调节来缓解甚至扭转。研究结论为制定乡村振兴的公共政策提供了理论基础和政策参考。

关键词：乡村振兴乡村治理集体行动劳动力外流社会生态系统分析

Diagnosing Complexity in Social-Ecological System——Irrigation Institutional Changes in Imperial China

在线全文

学校读者我要写书评

暂无评论

Diagnosing Complexity in Social-Ecological System——Irrigat...

Prospects for China's Agricultural Modernization by 2035

作者： yahua wang the School of Public Policy and Management Tsinghua University

1 EXPLAINING USERS’SELF-ORGANI ZING TO MANAGE IRRIGATION SYSTEMS The governing of common-pool resources(CPRs),such as forests,fisheries, and irrigation systems,contains complexity in which the social systems interact with natural *** a long period,a prevalent viewpoint was that the user s of CPRs,could not self-organize to manage the resource. Many scholars often recommended the imposition of either of state

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

China Economic Transition 2023年第4期6卷 399-415页

作者： wang yahua ZANG Liangzhen SU Yiqing School of Public Policy&Management Tsinghua UniversityBeijing 100084China China Institute for Rural Studies Tsinghua UniversityBeijing 100084China Institute of Agricultural Economics and Development Chinese Academy of Agricultural SciencesBeijing 100081China School of Public Policy&Management Guangxi UniversityNanning 530004China

An important task of China's agricultural development is to achieve modernization in all *** rural revitalization strategy was first introduced in the report to the 19th National Congress of the Communist Party of *** strategy now stands as the general guiding principle and central task of China's agricultural initiatives in the new era and serves as a pivotal move toward advancing agricultural *** into consideration the current situation of China's agricultural development,the authors analyze the factors driving agricultural modernization and project the trajectory of agricultural modernization by *** findings indicate that China has created a conducive institutional and development environment in production,consumption,,industry,science and technology,trade,etc.,thereby laying a solid foundation for its agricultural *** suggest that by 2035,China will establish itself as the world's preeminent nation inagricultural lproductionnand consumption,a powerhouse in agricultural industrialization and agricultural product trading,and a leading country in agricultural science and ***,China still faces tremendous challenges in terms of consumption structures,quality requirements,industria1l development,format innovation,production methods,service functions,scientific and technological levels,and personnel ***,on the path to agricultural modernization,China still needs to advance the structural reforms on the agricultural supply side,shift its agricultural production and operation methods,elevate its level of opening up in agriculture,and foster a deeper integration between urban and rural areas.

关键词： agricultural modernization prospect challenge strategy environment

The Policy Process for Trans-jurisdictional Water Pollution Management and Cooperation in China River Basins:A Case Study of Control Over Water Pollution in the Borderlands Between Jiangsu and Zhejiang Provinces

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Policy Process for Trans-jurisdictional Water Pollution ...

超越女性话语,走向“无我”境界——艾丽斯·默多克小说的美学追求,兼论《在网下》

2007 International Conference on Public Administration（ICPA 3rd）

作者： BI Liang-liang wang yahua School of Public Policy and Management Tsinghua University

The deterioration of water pollution drainage in China is caused by poor administrative structure as well as natural *** efficiency even inefficiency in trans-jurisdictional water pollution management by local governments,has resulted in environmental accompanying economic development,many conflicts between people living up and-down-stream,and potential hidden trouble in social *** examining the reform of the water pollution management and cooperation mechanism between Jiangsu and Zhejiang Provinces,this paper tries to illustrate policy evolution process between two provinces,to understand the difficulties in trans-jurisdictional water pollution management of river basins in *** case study shows the integrated reform of trans-jurisdictional water pollution control based on "Tiao-Kuai-System" that coordinates between central-local government structure and department inner-system should consist of institutions,mechanism and law reforms.

关键词： Policy process Trans-jurisdictional River basin Water pollution management Institution

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

国外文学 2006年第4期 82-91页

作者：王雅华北京语言文化大学外语学院

艾丽斯·默多克是当代英国具有非凡才智的女作家、哲学家。她的小说以其深邃的哲理、生动的故事情节、兼容并蓄的艺术风格而闻名于当今世界文坛,为我们展现了更加开放的、多维的艺术世界和现代西方社会的人生百态。本文试图从默多克的... 详细信息

艾丽斯·默多克是当代英国具有非凡才智的女作家、哲学家。她的小说以其深邃的哲理、生动的故事情节、兼容并蓄的艺术风格而闻名于当今世界文坛,为我们展现了更加开放的、多维的艺术世界和现代西方社会的人生百态。本文试图从默多克的小说创作理念入手来评介她的小说叙事话语、美学主张,以及她小说的非女性主义写作特征,并以她的第一部小说《在网下》为例来阐释小说中的男性叙述角度,从而揭示默多克作为一个艺术家和哲学家,对“无我”境界的不懈追求,对人的存在问题、对生活和艺术本质等问题的深刻思考。

关键词：默多克无我男性叙述角度角色《在网下》