城乡互动中教师交流的策略探析

本文提及的教师交流策略包括城市学校选派"名师团队"到农村学校进行"帮扶"工作,农村学校选派骨干教师到城市学校进行"浸润式"学习;采用"波纹式"互动方式,由点带面、邻近互动;不借助信息技术手段的教师交流时间不能太短,要在农村学校的师生习惯于新的教学手段、教学理念以后才能停止;以信息技术手段,尤其是以计算机网络为媒介的后期服务、培训等工作不能间断。     

关中—天水经济区人类发展水平空间差异分析

以人类发展指数(HDI)为测度指标,利用HDI计算公式及ESDA方法,对关中-天水经济区65个区县的人类发展水平进行空间差异分析及空间关联分类。关中-天水经济区人类发展水平大多数处于中下水平,且区域差异明显,呈现由市辖区向周边区县递减的分布特点;构成人类发展指数的三个指标中预期寿命指数和教育指数的区域差异较小,而GDP指数区域差异大;关中-天水各区县的人类发展指数存在较强的正的空间相关性,西安市的雁塔区、未央区、莲湖区、碑林区等9个区县成为高-高聚集型区县的显著性聚集区,而天水市的张家川、清水县、秦安县和宝鸡市的陇县等6个区县成为低-低聚集型的最显著区域。针对关中-天水经济区人类发展水平的区域差异,提出相应的政策建议。     

构建师生互控教学机制的研究

改革开放以来,我国高等教育事业获得长足发展,改革取得令人瞩目的成绩。人才培养是高等学校的根本任务,提高教学质量是高校工作永恒的主题。文章认为高校要以教学监督与制度建设为保障,以设立教育教学评估中心为途径,以教育部本科教学评估为契机,在建立健全教学质量监控长效机制方面做了一些有益的探索和尝试。     

TD-LTE各种上下行配置的性能比较

TD-LTE是我国拥有核心自主知识产权的下一 代无线通信技术标准,共有7种不同的上下行配置,以灵活支持不同的上下行业务需求。通 过研究不同上下行配置对应的各种时序,得出不同上下行配置对上下行时延的影响。通过分 析在不同上下行配置下信道质量反馈、上行探测信号、混合自适应重传等技术的配置,研究 了不同上下行配置对上下行吞吐量及频谱效率的影响。同时利用系统仿真验证了以上分析结 果,给出了不同上下行配置性能下时延、吞吐量、频谱效率性能。研究结果为不同业务和组 网要求下 上下行配置的选择提供了参考依据。     

Using choice experiments to value catchment and estuary health in Tasmania with individual preference heterogeneity*

Choice experiments (CE) have become widespread as an approach to environmental valuation in both Australia and overseas. However, there are few valuation studies that have addressed natural resource management (NRM) changes in Tasmania. Furthermore, few studies have focussed on the estimation of estuary values. The CE study described in this paper aims to analyse community preferences for NRM options in the George catchment, Tasmania. Catchment health attributes were: the length of native riverside vegetation; the number of rare native animal and plant species in the George catchment; and area of healthy seagrass beds in the Georges Bay, which was used as a measure of estuary condition. Mixed logit models with interactions between socio‐economic variables and the choice attributes were estimated to account for systematic and random taste heterogeneity across respondents. Results reveal considerable variation in preferences towards the attributes and show that value estimates are significantly impacted by the way in which we account for preference heterogeneity. Preference heterogeneity thus needs to be considered when estimating community willingness‐to‐pay for environmental changes. This study further shows little responsiveness to the presented changes in estuary seagrass area.     

Methods and tools for integrated assessment of land use policies on sustainable development in developing countries

For stimulating sustainable development in developing countries, land use patterns and land use changes are considered critical, and therefore effective and efficient land use policies are needed. In this paper we present a methodological framework that has been developed in a joint European and developing countries project (LUPIS – Land Use Policies and Sustainable Development in Developing Countries), to assess the impact of land use policies on sustainable development in developing countries. An illustrative application is presented for a case study in China, where water pollution due to agriculture in Taihu Basin is a major problem.     

Consumer engagement with brands on social network sites: A cross-cultural comparison of China and the USA

To advance theoretical understanding of consumer engagement on social media, this cross-cultural study evaluates how culture influences consumers’ engagement levels and activities on brand pages of social network sites. It further evaluates the underlying motivations and engagement mechanisms in two culturally distinct countries, China and the USA. Specifically, social media dependency, parasocial interaction, and community identification are examined as the key antecedents of consumer-brand engagement. The results confirm the effects of the proposed antecedents and reveal both cultural differences and similarities between Chinese and American consumers’ engagement with brand pages on social network sites.     

Dynamic routing of time-sensitive air cargo using real-time information

The route planning of time-sensitive air-cargo is becoming more important with the growing air-network congestion and delays. We consider a freight forwarder’s routing of a time-sensitive air-cargo in the presence of real-time and historical information regarding flight availability, departure delays and travel times. A departure delay estimation model is developed to account for real-time information inaccuracy. A novel Markov decision model is formulated and solved with online backward induction. Through synthetic experiments and case studies, we demonstrate that dynamic routing with real-time information can improve delivery reliability and reduce expected cost.     

廉政文化建设与和谐社会建构互涵互动的内在逻辑：“同频共振”机理

廉政文化建设与和谐社会建构的关系并非单方向的，而是双向作用的机制。一方面，廉政文化建设有利于促进社会更好地走向和谐；另一方面，和谐的社会氛围反过来又为廉政文化建设的开展创造了良好的社会环境，和谐社会的构建对廉政文化建设起着逆向加强的作用。二者互涵互动、相得益彰，二者的关系可以形象地称为“共振”效应。“共振”之为“共振”，从根本上讲，乃在于二者是“同频”的，“同频”方能“共振”。正是因为二者的基本理念、价值取向、精神内核、追求目标是根本一致的，二者才能朝一个方向使劲，相互促进、相互加强，产生巨大的“合力”，这才是二者互涵互动的内在机理。     

一类具有无界时滞的微分不等式

本文建立了一类具有无界时滞微分不等式,将有界时滞微分不等式推广到无界时滞微分不等式,并得到其解的指数估计和渐近估计.