城市地价监测点配置的空间关联模式

城市地价过快上涨倍受关注,地价监测点反映地价信息的准确与全面性直接影响对地价变化水平的把握。已有研究是采用空间群点简化或分层抽样模式配置监测点,但太过强调监测点数量的控制与简化,忽略了地价分布的空间相关性与整体性。本文提出了城市地价监测点配置的空间关联模式,在挖掘城市地价分布特征、空间自相关信息的基础上,结合"系统非对齐抽样"方法布设地价监测点,运用2008年南京市地价动态监测及基准地价更新研究中的住宅地价样点资料对本文设计的监测点模型进行检测,住宅地价监测点配置结果不仅能体现城市经济发展重点区域重点监测原则,而且可较为准确地掌控地价的水平与空间布局信息,提高地价监测数据质量的同时为地价下一步更新奠定了基础。     

How accurately can students evaluate the quality of self-generated examples of declarative concepts? Not well,and feedback does not help

Students are commonly asked to learn declarative concepts in many courses. One strategy students report using involves generating concrete examples of abstract concepts. If students have difficulties evaluating the quality of their generated examples, then instructors will need to provide students with appropriate scaffolds or feedback to improve judgmentaccuracy. No prior research has investigated if students can accurately evaluate the quality of the examples they generate, which was the first aim of the current research. The second aim of this research was to investigate the extent to which providing feedback while students evaluate their generated examples can improve the accuracy of their example-quality judgments. In two experiments, students generated examples for declarative concepts from social psychology and then judged the quality of their examples. When making judgments, students received no feedback (in which they were only given the key term), full definition feedback (in which they were shown the definition of the declarative concept) or idea unit feedback (in which they first evaluated if they represented each idea unit of the definition within their example). Outcomes showed that students were overconfident when judging the quality of their examples, specifically for commission errors (i.e., examples that were entirely incorrect). Surprisingly, full definition and idea unit feedback did not help students improve the accuracy of their example-quality judgments. Thus, until scaffolds are discovered to reduce student overconfidence, instructors will need to assist in evaluating generated examples as students use this strategy to learn declarative concepts.     

利用微电子测试图形监控CCD工艺

本文根据硅CCD摄像器件的特点和要求,设计出一套可用来监控硅CCD工艺的测试图形,并把此套图形应用于实际的CCD工艺。实验分析其它工艺参数的同时,重点对存贮时间Tc和界面态密度Nss进行了研究。认为工艺过程引起存贮时间的下降,是由于工艺诱生位错的影响,而工艺诱生位错主要由多晶硅层上二次栅氧化的界面应力所导致;认为界面态密度主要取决于栅氧化和退火工艺,与中间工序的关系不明显。整个实验表明,用微电子测试图形监控CCD工艺、分析器件失效,是可行可靠的。     

换热器失效及监测技术总结

换热器是一种十分重要的换热设备,在石油化工、动力、钢铁等行业被广泛应用。介绍了换热器的应用背景及换热器在石油化工生产中存在的一些问题,进而针对存在的问题总结了现有国内外的主要监测技术,并对换热器基于振动声音传感器的复合式无损检测技术在线监测系统的特点进行了简要的描述。     

义务教育均衡发展评估模型研究

义务教育均衡发展是当前政府及学术界关注的一个焦点问题。它是一种全新的教育理念和教育发展观,核心是追求教育平等,实现教育公平。当前,全国对义务教育均衡发展的理论研究与区域实践成果丰硕,但是基于监测与评估这样一种科学的角度去探索义务教育均衡发展的规律,从而建构起义务教育均衡发展模型的研究还较少。本文尝试从义务教育均衡发展的内涵解读入手,通过分析其相关因素建构了义务教育均衡发展的模型,并通过实证研究印证了模型的合理性与科学性。在此基础上,进一步对义务教育均衡发展进行了深入思考。研究认为,要坚持义务教育均衡发展的系统观、过程观;探索义务教育均衡发展的动态性规律变化;追求以教育质量高水平发展为标志的义务教育高位均衡;建立科学的评估与监测机制保障义务教育质量高位均衡实现。     

视频监控系统中协议融合的研究

本文在分析现有视频监控系统在互联互通方面存在问题的基础上,提出了一个多目标模糊决策的协议融合算法,设计了一个兼容异构系统的信令服务器。通过对呼叫数据包进行协议解析,计算每个约束条件的隶属度,参考隶属度进行综合评判,判定是否能够正常建立会话。实验结果表明,具有协议融合功能的视频监控系统能够与其他协议多媒体终端建立会话,可作为组建下一代大型视频监控网络的参考。