乡村居民疫水接触时空规律研究

基于农村居民疫水接触的空间行为及作息时间的地理调查,了解乡村居民的血吸虫病疫水接触时空规律,对43个行政村的疫水接触人数、方式、天数、接触季节和时间段进行调查。农村居民疫水接触方式有种田、捕鱼、游泳、抗洪、挖沙、打藜蒿、放牛、养鸭和洗衣服洗菜一共9种方式,接触方式多、时间长,感染血吸虫病危险性较大。     

基于物联网与3G整合的电子商务应用资金流探析

文章在简要介绍物联网与3G网络的基础上,阐述了物联网与3G整合背景下电子商务资金流所具备的特点,进而论述了此背景下资金流的优化和作用,最后重点分析了整合背景下电子商务资金流的两个应用案例。     

基于遗传算法的关联议题并发谈判

基于遗传算法的并发谈判在电子商务应用中具有独特的优势,但已有的研究尚未考虑议题之间的相关性、动态权重的变化规则依赖于对手信息的获取,极大地限制了其使用价值.对此,提出议题分组的方法以解决议题的相关性问题,而议题权重的变化则采取从历史资源中发掘知识的方法进行动态调整.构建了基于遗传算法的关联性议题并发谈判模型,给出了模型的形式化描述、谈判算法设计和动态权重更新方案.通过对模型的实验和比较分析,证实了该方案能够更方便地满足用户谈判的多样性需求,解决谈判中议题关联性的问题,而且能够快速、有效地得出最优谈判结果.     

增效超分散剂对铜酞菁颜料表面改性的研究

本文合成了几种增效超分散剂，并用于β-型铜酞菁的表面改性，其分散性、流动性和色光均有提高。结果表明，以聚酯为溶剂化链，胺或多胺类为锚基，通过砜基连接到铜酞菁分子上制成增效超分散剂。当超分散剂的用量由0％增加至8％时，体系的流动度由29增加到45；溶剂化链的分子量在1800-8000时，体系的分散性提高明显：在不同的脂肪胺中，多乙烯多胺效果最佳。这类分散剂都具有很好的抗絮凝性能，所制成的油墨长时间置放不分层。     

电力系统稳定性研究的方法论思考

文章对电力系统稳定性研究内涵进行了评述，然后从认识论和方法论上加以分析，讨论了认识过程从功角稳定到电压稳定的转变、从线性向非线性的转变、从简单系统到复杂系统的转变、从重视解析方法到重视非解析方法的转变过程，为电力系统稳定性研究提供方法论指导。     

Preparation of a sensor substrate using functionalized mesoporous silica on a gold film for surface plasmon resonance (SPR) spectroscopy

The use of surface plasmon resonance (SPR) spectroscopy has been applied to a wide variety of fields such as biosensors and surface analysis instruments. In general, a SPR substrate is prepared using self-assembled monolayer (SAM) method of organic molecules as receptor for the target on a layer of gold or silver. However, mesoporous inorganic materials such as SBA-15 have benefits as sensor substrate for SPR. Mesoporous silica has a large surface area which receptor molecule can be attached and has a rigid body which has an excellent stability in the extreme condition compared to organic sensing layer. We prepared an organic modified mesoporous silica and successfully immobilized it on a gold surface, in an attempt to use as a substrate for SPR spectroscopy. For the comparison of sensitivity of prepared substrate, Pt²⁺ detection was selected as a model system. Substrate prepared in this study exhibited the capability of selective sensing for Pt²⁺ ions.     

液态锡焊料常见元素氧化的热力学分析

计算了液态锡焊料中常见元素氧化物生成的标准吉布斯函数随温度的变化关系,绘制了相关氧化反应的ΔGTθ-T图.研究表明,在液态Sn-Pb焊料和Sn-Ag-Cu,Sn-Cu无铅焊料的氧化过程中,对Sn的氧化而言,其表层分子会生成SnO2,在表层分子以下则可能生成SnO;对于Pb的氧化而言,主要生成PbO;而Ag、Cu的氧化物主要是Cu2O和Ag2O.液态锡焊料中所涉及的元素与氧化合的能力依次为:Al>Ga>Zn>ln>Ge>Sn>Fe>Sb>As>Pb>Bi>Cu>Ag.指出,当大量加入与氧化合能力较Sn强的元素作为焊料合金组分时,将会降低其在液态下的抗氧化能力;反之,则可使它的抗氧化性能得到改善.     

Energy transfer mechanism of GdPO4: RE3+ (RE = Tb, Tm) under VUV-UV excitation

Polycrystal of GdPO₄:RE³⁺ (RE=Tb, Tm) phosphors were prepared by solid-state method. Vacuum ultraviolet excitation and emission spectrum and the energy transfer mechanism between the host and dopants of Tb³⁺ and Tm³⁺ were investigated respectively. The emission of Gd³⁺ at 313 nm was enhanced by the strong absorption of CTS of Tm³⁺ at 180 nm in GdPO₄: Tm. It has also been concluded that the excitation of Gd³⁺ is transferred to Tb³⁺ and then emission peaks of ⁵D_J→⁷F_J of Tb³⁺ were observed.     

Symbol error rate of selection amplify-and-forward relay systems

Cooperative diversity schemes significantly improve the performance of wireless networks by transmitting the same information through several nodes. The amplify-and-forward (AF) relaying method is one of the most attractive cooperative diversity schemes due to its low complexity. Selection AF relaying has recently been proven to achieve the same diversity order as and lower outage probability than all-participate relays. In this letter, we present an asymptotic analysis of the symbol error rates of a selection AF network, and compare it with the conventional all-participate scheme     

供需链系统重构的方法与工具研究

基于SCOR模型以及供需链的性能分析，提出了一套可操作的供需链系统重构方法，涵盖了供需链的建模、分析、改进、实施等各个阶段，并且介绍了为使供需链系统的重构过程自动化和智能化而自行设计并开发的软件工具—SCEasy Transfer。