阴离子-阳离子复合表面活性剂体系用于压裂液助排剂的研究

将所研制的阴离子-阳离子复合表面活性剂与不同非离子表面活性剂及其它助剂复配,制成了ZA系列助排剂,考察了这些助排剂的表面活性、在岩芯上的吸附损耗及其对羟丙基田菁胶压裂液粘度和滤失性的影响,报导了在中原油田高温低渗透地层压裂施工中成功应用的实例。     

侦察雷达网作战效能的综合评估

组网雷达作战效能评估应用系统理论、离散数学等方法实现.该指标体系从可用度和可信度、探测能力、侦察能力、信息处理能力、生存能力等方面评价雷达网作战效能.评估过程综合考虑指标的全面性、合理性、独立性,建立侦察雷达网指标体系,通过权重确定,指标量化,及科学分析,得出评估模型.     

基于蒙特卡罗仿真的雷达装备重要度评价

基于蒙特卡罗仿真的雷达装备重要度评价方法,其权重由相关分布均匀随机发生器产生的一组权重的最大值分配给优先级最高的因素,最小值分配给优先级最低的因素,其余依次类推。然后计算设备重要度评价指数,并将设备按重要度评价指数大小进行排序。经多次抽样计算后,进行蒙特卡罗统计分析,确定设备重要程度的排序。实例验证该方法可降低人的主观因素对重要度评价结果的影响,有效可行。     

实时测控软件系统测试方法研究

针对基于UNIX平台的实时测控软件系统多进程多线程并发运行、信息流量大、接口关系复杂、实时性强、可靠性高的特点，在分析实时测控软件功能测试的基础上，提出了采用软件集成和嵌入监测模块的方法，实现了对实时测控软件系统CPU使用率、模块级运行效率、资源开销等性能测试，解决了实时测控软件性能测试的难题，为实时测控软件系统研制、质量评定和应用提供了科学的依据．     

基于模糊综合评判的装备训练评估标准优选

采用定性与定量相结合评估思想,针对某大型复杂战役地空导弹训练评估标准优选问题,运用模糊综合评判方法,综合考虑操作时间、操作步骤、操作技巧、操作成效、口令、士气等各方面的因素,建立该型装备训练评估标准.步骤包括:确定评价因素、评价等级,构造评判矩阵,确定权重,进行模糊合成和做出决策.     

基于技术检测的装甲装备武器系统执行任务能力评估

技术状态对装甲装备武器系统的执行任务能力有着重要影响,目前对其评估的研究还很少。针对这一问题,提出了一种利用技术检测的装甲装备武器系统执行任务能力评估方法,并结合某装甲装备武器系统进行了实例分析。该方法具有可操作性,能够为装甲装备武器系统检测设备和技术的发展提供数据参考。     

Educational technology research trends in Turkey from 1990 to 2011

The purpose of this study is to examine the characteristics, methodologies, and general trends in Educational Technology articles, written by authors from Turkey, published in journals listed in the SSCI, SCI, and ERIC indexes from 1990 to 2011. A total of 1151 (SSCI:813, SCI:38, ERIC:300) articles published in 94 journals were examined via content analysis, using the ‘Educational Technology Papers Classification Form’ (ETPCF). The results show that the number of published Educational Technology studies dramatically increased in the years 2002 and 2007. “Educational environments and technology”, “distance education” and “multimedia” were the predominant subjects of the articles, though there were variations in terms of research topics and methodologies. Regarding research methodologies, quantitative studies were the most common type. Questionnaires and interviews were most commonly used as data collection tools, and the convenience sampling method was also widely used. The frequently studied sample participants were preservice teachers and other undergraduate students. In the present study, cross tabulation is used to present the findings.     

The effectiveness of a one-year online mentoring program for girls in STEM

Although the performance of girls in science, technology, engineering, and mathematics (STEM) is continually improving and is no longer below that of boys in most domains, girls' interests in STEM and participation rates are still too low. Online mentoring may help ameliorate this situation. To test this assumption, a one-year personal mentoring program for eleven to eighteen-year-old female college-preparatory students was evaluated. Mentee and mentor communicate with one another and with other program participants via email, online chat, and forums. To measure program effectiveness, we randomly assigned participants (N = 312) to either a treatment group (N = 208) or a waiting-list control group (N = 104). We collected questionnaire data at three points in time. In comparison to the waiting-list group, the treatment-group participants showed greater levels of desirable short-term and long-term developments. Our findings indicate various advantages for online mentoring for promoting girls' interests in STEM.     

Hyperwelcome

Web page annotation and adaptive navigation support are two active, but independent research directions focused on the same goal: expanding the functionality of the Web as a hypertext system. The goal of the AnnotatEd system presented in this paper has been to integrate annotation and adaptive navigation support into a single value-added service where the components can reinforce each other and create new unique attributes. This paper describes the implementation of AnnotatEd from early prototypes to the current version, which has been explored in several contexts. We summarize some lessons we learned during the development process and which defined the current functionality of the system. We also present the results of several classroom studies of the system. These results demonstrate the importance of the browsing-based information access supported by AnnotatEd and the value of both the annotation and navigation support functionalities offered by the system.     

像面编码计算成像实验研究及重构图像的质量评价

针对国产化大面阵红外器件技术缺乏,用红外焦平面探测器获取图像时难以消除自身的非均匀性以及信噪比低,航空航天成像应用中的图像采集、传输、存储成本越来越高等问题.论文引入了像面编码计算成像,首先分析了这种成像系统的原理模型,然后将压缩感知理论应用于计算成像中,搭建成像原理样机,进行非压缩和压缩的计算成像实验.最后在重构的图像质量评价中引入了信号子空间分析方法,进行重构图像的信噪比估计,实验结果表明,这种信噪比估计方法更加准确有效,并且可以以此作为实验结论给出实际压缩成像时需要的合理采样次数.