基于模糊神经网络的水轮机调速器PID控制

针对水轮机调节系统参数时变、运行工况多变以及包含复杂非线性环节的特点,传统的PID控制策略难以满足系统各项运行指标。根据水轮机调速系统的数学模型,结合模糊控制的推理能力和神经网络的自学能力,提出基于模糊神经网络的水轮机调速器PID参数控制策略。仿真结果表明,相比于传统PID控制和模糊控制,所提控制策略的系统响应拥有更小的超调量和更短的调节时间。     

Microwave response characteristics and influencing factors of ores based on dielectric properties of synthetic samples

In order to understand the influence of different factors on the microwave response characteristics of ores, the effects of electrical conductivity, metal mineral content, compactness, metal mineral distribution, microwave frequency and temperature on the dielectric properties of synthetic ores (metal mineral and quartz) were studied. Microwave heating tests were carried out on three types of natural ores (Hongtoushan copper ore, Sishanling iron ore and Dandong gold ore) with significant differences in metal mineral contents. The test results showed that under microwave irradiation, the stronger the electrical conductivity of the metal minerals, the smaller the penetration depth in synthetic ore. For those metal minerals with lower electrical conductivity, the microwave absorption coefficient of the synthetic samples increases with increasing metal mineral content. For those metal minerals with higher electrical conductivity, the microwave absorption coefficient of the samples first increases and then decreases as the metal mineral content increases. When the metal minerals are distributed in layers, the penetration depth is much less than that given a uniform distribution. The penetration depth in the sample at microwave frequency of 915 MHz is greater than that at 2.45 GHz. The higher the electrical conductivity of metal minerals used in synthetic ores, the higher the high-temperature sensitivity of electromagnetic shielding coefficient (0 °C–500 °C). The Hongtoushan copper ore with high metal mineral content exhibits obvious size effect. The effects of ore structure and crystal particle size on the distribution characteristics of microcracks were discussed. Based on the test results, a quantitative prediction model of microwave sensitivity of ore was proposed, which provides guidance for the prediction of ore heating effect and the selection of microwave heating sequence of ore.     

ABS树脂装置丁二烯聚合釜及接枝釜洗涤水回用中试研究

在模试研究成果的基础上，进行了丙烯腈-丁二烯-苯乙烯共聚物（ABS）树脂装置丁二烯聚合釜和接枝釜洗涤水回用的中间实验。结果表明：中试结果与模试结果相近；接枝聚合时加入丁二烯聚合釜洗涤水，其用量应使m1／（m1＋m2）（m1为洗涤水中聚丁二烯的质量，m2为新鲜聚丁二烯胶乳中聚丁二烯的质量）不大于0．30％，固体物质量分数为0．5％～2．7％；ABS胶乳凝聚时加入接枝釜洗涤水，其用量应使m3／（m3＋m4）（m3为洗涤水中ABS的质量，m4为新鲜接枝胶乳中ABS的质量）不大于0．38％，固体物质量分数为0．1％～14．9％；洗涤水回用对ABS树脂的性能没有影响，其各项性能完全能够达到优级品301型ABS指标要求。     

新疆兵团节水装备云制造公共服务平台研究

根据产业链的结构及企业内部的架构和管理机制,对企业资源、需求进行了整合和按需优化配置,以实现制造过程服务化和管理过程服务化. 分析了节水装备制造业的生产流程和制造工艺. 根据面向服务的理念,提出了基于SOA的云制造服务平台的体系架构,设计和搭建了节水装备云制造公共服务平台.     

档案馆建筑的绿色建筑设计策略

介绍了档案馆建筑设计中,通过采用与绿色建筑相关的技术手段和策略解决的技术难题,包括严寒地区档案库区部分建筑的围护结构热工设计、干燥地区夏季空调系统节能设计、室内环境优化措施等,达到了绿色建筑标准要求。     

基于AMBA总线的高性能QDRⅡ SRAM控制器设计

针对高速网络的需求,介绍了一种高速静态存储器QDRⅡSRAM,设计了一种基于AMBA总线的高性能QDRⅡSRAM控制器IP,具有良好的接口兼容性和可移植性。使用了深度为8×72位的写出FIFO与8×72位读入缓冲,增加了系统存取的效率,设计通过仿真及实际验证,能够良好应用于系统时钟为800 MHz的SOC环境中,满足功能和时序要求。     

Rapid preparation of noble metal nanocrystals via facile coreduction with graphene oxide and their enhanced catalytic properties

We present the facile preparation results of noble metal nanostructures induced by graphene via rapid coreduction by Ti(3+) at room temperature. Such a reduction of graphene oxide (GO) can be readily performed in solutions or on various substrates within seconds. High quality noble metal nanocrystals can be prepared by using graphene as the controlling agent at room temperature, including Rh, Au and Rh-Pt nanodendrites and Pd nanoparticles, showing the roles of graphene on tuning the growth behaviors of nanostructures. These surface clean Pd nanoparticles show high catalytic activity and selectivity in Suzuki and Heck coupling reactions.     

卷烟工业企业公用工程系统运行能效指标研究与应用

空调系统、蒸汽锅炉系统和除尘系统是卷烟工业企业公用工程系统的主要能源消耗系统,国家、行业标准对以上系统制定了一些系统能效指标,卷烟企业的三级能耗定额管理也有相应的系统能效指标,但是这些指标均存在一定的问题.按照能效指标制定的原则,指出了现有能效指标的优缺点,提出了适用于运行阶段评价的系统能效指标.