保定农村电子商务发展策略研究     

张楠楠  柴若冰 《保定学院学报》2020,(1):130-136

“互联网+”背景下,电子商务与农村经济的结合为农业发展带来了新的思路,但同时农村电子商务在发展中也面临诸多问题。引入比较优势指数法对保定各地优势农产品进行测算,并就保定农村电商发展现状进行实地调研,结果表明:保定农产品网店已初具规模,店铺分布呈现非均衡性,经营主体以青年人为主,原材料供应型店铺占主导地位,电商发展的配套系统如人才、科技信息服务平台、物流配送系统等仍不完善,成为制约电商发展的主要因素,亟须各部门配合综合加以解决,形成农村电商的整体合力,为推动农村产业结构的转型升级提供助力。  相似文献   

From structure to function: unveiling the structure of the Nav channel–toxin complex     

Zhuan Zhou  Zuying Chai  Changhe Wang 《国家科学评论(英文版)》2019,6(5):859

  相似文献   

试论体育专业教学评价的时代特征   总被引：2，自引：0，他引：2  

袭长城  柴全义 《福建体育科技》2003,22(1):42-44

教学评价是教学活动中的重要环节。随着教育教学思想、观念的更新 ,体育教学的指导思想、目标的发展与变化 ,体育教学评价的时代性特征表现为 :评价内容的全面性、评价指标的层次性、评价对象的整体性、评价目的的发展性、评价方式的综合性和评价结果的导航性。  相似文献   

固体物料的浆液管道输送     

吴翼斌  王绍宏  蔡正平 《上海海事大学学报》1992,(1)

本文介绍了本世纪50年代发展起来的一种新的运输方式——固体物料的浆液管道输送。简述了世界主要各国应用这种运输方式的发展概况和现状。提出了浆液管道输送的优缺点。为了更广泛地应用和发展这种运输方式,本文还着重归纳了国内外正在进行和应该着手进行的若干研究课题及研究方向。  相似文献   

改革十年的图书馆学:——“理论与实践脱节”解决方法研究述评     

柴纯清 《中国图书馆学报》1991,17(1)

For more than ten years,lots of ways have been set forth to salve the problem of"theory di-vorced from practice",such as:the study of library science should move towards an orderly way andintensiveness;an institute of library science studies should be set  相似文献   

Turning a Service Learning Experience into a Model of Student Engagement: The Lighthouse Heritage Research Connections (LHRC) Project in Hong Kong     

Steve H. Ching 《The Journal of Academic Librarianship》2018,44(2):196-206

The digital shift has provided easy access to academic library users, and yet, the usage of archival collections continues to be low. At the same time, the need for innovation in library services for cultural heritage scholarship and its advancement is emerging. This paper outlines a library-led service-learning program that connects students with lighthouse artifacts, archival collections, scholars in global academia, and wider communities. Student engagement cases are provided to illustrate the way in which the librarian utilizes the Framework of Information Literacy for Higher Education by ACRL to work closely with students. These cases also demonstrate how students can contribute to knowledge creation and preservation efforts for a specific cultural heritage topic that is not static, but which keeps receiving new contributions or additions to the depository. Thus, this paper is an answer to the ACRL's call for pilot projects to be assessed and shared with the wider community of academic librarians and support staff. It also builds on emerging roles for academic libraries like engaged learning. Librarians must move beyond simply seeing themselves as partners. Instead, librarians should see themselves as prime facilitators that co-create and co-develop cultural heritage research and historical projects by connecting actors and resources more effectively than any single actor can do alone.  相似文献   

Thermal mixing of two miscible fluids in a T-shaped microchannel     

Xu B  Wong TN  Nguyen NT  Che Z  Chai JC 《Biomicrofluidics》2010,4(4):44102

In this paper, thermal mixing characteristics of two miscible fluids in a T-shaped microchannel are investigated theoretically, experimentally, and numerically. Thermal mixing processes in a T-shaped microchannel are divided into two zones, consisting of a T-junction and a mixing channel. An analytical two-dimensional model was first built to describe the heat transfer processes in the mixing channel. In the experiments, de-ionized water was employed as the working fluid. Laser induced fluorescence method was used to measure the fluid temperature field in the microchannel. Different combinations of flow rate ratios were studied to investigate the thermal mixing characteristics in the microchannel. At the T-junction, thermal diffusion is found to be dominant in this area due to the striation in the temperature contours. In the mixing channel, heat transfer processes are found to be controlled by thermal diffusion and convection. Measured temperature profiles at the T-junction and mixing channel are compared with analytical model and numerical simulation, respectively.  相似文献   

P-V图与热力学第一定律中的诸量     

柴英  王少华 《陕西理工学院学报(社会科学版)》1996,(6)

通过讨论热力学系统在准静态过程ΔE、A、Q诸量与P－V图中过程曲线之间的关系，可直接从P—V图上判断内能的增减、做功正负及热量交换的方向。  相似文献   

论"十一五"期间促进企业参与职业教育的区域政策取向   总被引：4，自引：0，他引：4  

柴彦辉  刘春生 《职教通讯(江苏技术师范学院学报)》2006,(6):12-14,17

调控企业参与状况的实质是调节某一经济范围中企业分担职业教育经费数量与形式的构成,调控目标是实现区域经济增长与企业参与职业教育之间的均衡,从基于DPE分析的企业参与职教行为调控模型出发,促进企业参与职业教育的区域政策应当是因地制宜、具有地方特色的策略组合;并以扩大企业技术人才需求、增大区域企业(群体)参与职教倾向、改善企业参与的区域环境为取向。  相似文献   

Tracking Pre-service Teachers’ Changing Conceptions of Good Science Teaching: The Role of Progressive Reflection with the Same Video     

Benny Hin Wai Yung  Siu Ling Wong  Man Wai Cheng  Ching Sum Hui  Derek Hodson 《Research in Science Education》2007,37(3):239-259

A CD-ROM consisting of videos of two lessons by different teachers demonstrating exemplary science teaching was used to elicit, develop and track the changing conceptions of good science teaching of student teachers enrolled for the one-year Postgraduate Diploma in Education (PGDE) at several stages during the programme. It was found that the videos acted as an effective probe to elicit student teachers’ conceptions and had significant impact on those conceptions at different stages of the programme through the provision of teacher models demonstrating exemplary teaching. The experience has extended novice teachers’ awareness of alternative teaching methods and approaches not experienced in their own schooling, broadened their awareness of different classroom situations, provided proof of existence of good practices and prompted them to reflect on their current conceptions of good science teaching. Most importantly, the strategy of asking student teachers to watch the same videos on three separate occasions at different times of the course was recognized by them as a crucial element in facilitating their reflection on their changing conceptions of good science teaching. PGDE is the standard form of pre-service teacher education in Hong Kong. It provides qualified teacher status within Hong Kong. Student teachers enrolled for the PGDE have completed a relevant undergraduate degree.  相似文献