再论甜菊糖苷的甜度、甜味和苦涩后味的成因机理

从分子化学结构角度出发,再一次论述分析了甜度、甜味与苷元的C连接部位和糖基种类、葡糖基数的关系;论证了甜菊糖苷甜味带苦涩后味的根本原因和事实,并详尽列出应用文献。     

亚硫酸化玉米油的研制与应用

本文书回归分析和最优化技术应用于玉米油的亚硫酸化研究。用模糊控制评分法将加脂乳液稳定性数量化，采用改进的逐步回归分析法，调用ＡＳＲＡ软件，建立了亚硫酸化产物乳液稳定性与温度，空气流量，ＮａＨＳＯ３用量和反应时间之间关系的数学模型，并用非线性规划方法寻求最佳工艺条件。优化所得工艺条件的特点是ＮａＨＳＯ３用量少，反应时间短。所得亚硫酸化玉米油乳液稳定性好。应用实验表明，该加脂剂在革内渗透深，分布均匀，加脂后的革含油量高，柔软，丰满，具有高的抗张强度。其加脂性能达到或超过国内同类产品的水平。在对亚硫酸化玉米油的研制和应用中，使用了化学方法，ＩＲ技术，并对加脂革进行了光学显微镜的观察。     

东乡铜矿Ⅴ矿体采矿方法模糊优选

用多目标决策法对东乡铜矿即将开采的Ⅴ矿体的采矿法进行模糊优选。并用徐罗曹李法和极小解正规路径递归筛选法解决了权重难以分配问题，得出了对东乡铜矿及其它矿床采矿法选择具有实用价值和普遍意义的科学结论．     

一类随机决策过程及其最优性

假设给定区间上的单峰函数的峰值点服从一给定的概率分布,对于任一给定的试验策略,本文定义了相应的多阶段决策过程。对任意给定的精度标准e和两试验点间最小允许距离d_0(d_0<ε);本文以试验次数的数学期望最小为最优指标,讨论了随机意义下的优选法问题,建立了对应于任一给定试验策略的随机决策过程,得到了最优试验策略应满足的充分必要条件。它是一组迭代方程,通过对这组方程的求解就能得到具体的试验策略,并能预报所需试验次数之数学期望的最优值。文中还考虑了限定做m批试验的优选问题,以试验后的δ精度的数学期望最小为最优指标,得到了类似的结果。     

An information-processing model of the decision to seek professional help.

Despite the presence of quality mental health care in many communities, people tend to avoid seeking help and wind up languishing in their problems unnecessarily. For the professional to better understand how to reach these individuals, an information-processing model is presented that examines the effects of people's interpretation of their environment and their symptoms on their decision to seek mental health services. Using the model as a guide, suggestions are presented for practitioners who wish to provide services to those who are in need of professional help, yet are hesitant to obtain it. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Intergroup helping as status relations: Effects of status stability, identification, and type of help on receptivity to high-status group's help.

Integrating research on social identity processes and helping relations, the authors proposed that low-status group members who are high identifiers will be unwilling to receive help from the high-status group when status relations are perceived as unstable and help is dependency-oriented. The first experiment, a minimal group experiment, found negative reactions to help from a high-status outgroup when status relations were unstable. The 2nd and 3rd experiments, which used real groups of Israeli Arabs and Israeli Jews, replicated this finding and showed that high identifiers were less receptive to help from the high-status outgroup than low identifiers. The 4th experiment, a help-seeking experiment with real groups of competing high schools, found that the least amount of help was sought from a high-status group by high identifiers when status relations were perceived as unstable and help was dependency-oriented. Theoretical and applied implications are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Multimedia displays for conceptual discovery: information seeking with strand maps

This article explores the use of a multimedia search interface for digital libraries based on strand maps developed by the American Association for the Advancement of Science. As semantic-spatial displays, strand maps provide a visual organization of relevant conceptual information that may promote the use of science content during digital library use. A study was conducted to compare users' cognitive processes during information seeking tasks when using a multimedia strand maps interface, versus the textual search interface currently implemented in the Digital Library for Earth System Education. Quantitative and qualitative data from think-aloud protocols revealed that students were more likely to engage with science content (e.g., analyzing the relevance of science concepts with regard to task needs) during search when using the strand maps interface compared to those using textual searching. In contrast, students using a textual search interface engaged more frequently with surface-level information (e.g., the type of a resource regardless of its science content) during search and retrieval. As a multimedia search interface for digital libraries, strand maps appear to be promising tools to promote conceptual discovery and learning through content-based processes that promote learner engagement with relevant science knowledge.     

高收率制备中间体2,4-二羟基苯乙酮

用高效液相色谱跟踪、正交设计研究了合成2，4－二基苯乙酮时催化剂用量，反应温度，反应时间，原料配比等因素的影响。发现冰醋酸用量是最主要的影响因素。在最优化条件下产率达到93％，比文献值（61％）提高了30个百分点，有很好的应用前景。     

优选平滑系数的指数平滑法电量预测系统

本介绍了一个用指数平滑法开发的电量预测系统。系统中平滑系数的选择采用了新近提出的０．６１８优选法，系统具有预测精度高，运行速度快和使用方便的特点。     

抽油机井系统的优化设计

利用回归分析方法对抽油机井系统效率测试中的试验数据处理,得到了排量系数、井下功率损失及地面效率的回归方程,以此为基础讨论了电动机额定功率的合理选择、抽油机井系统效率的预测及抽汲参数的优化设计。