不同场地条件下远场地震动强度指标与结构最大响应的相关性分析

为探究不同场地条件下远场地震动强度指标与结构最大响应的相关性问题,本文从K-NET和KiK-net台网强震记录中选取震级7级以上、断层距大于200 km的地震动记录1 328条,首先选用28个地震动强度指标进行了远场地震动强度指标与结构最大响应的总体相关性分析．然后,分别选取典型加速度类地震动强度指标、典型速度类地震动强度指标和典型位移类地震动强度指标进行了场地条件对结构最大响应相关性的影响分析．结果表明：(1) 加速度类地震动强度指标的相关系数随单自由度(SDOF)体系周期增大逐渐减小,与自振周期结构T≤1 s的低自振周期结构响应具有明显的相关性;速度类地震动强度指标的相关系数在T=2~5 s具有较大值,说明这一类指标与中长周期结构的响应具有明显相关性;当T>3~5 s时,典型位移类地震动强度指标的相关系数逐渐增大进入峰值区段,并保持较大的相关系数值,因此可以采用这一类指标表征长周期结构响应．(2) 对于加速度类地震动强度指标,Ⅰ、Ⅱ、Ⅲ类场地的相关系数随自振周期变化曲线走势较接近,Ⅳ类场地的相关系数值总体上要大于其它三类场地的相关系数．对于速度类地震动强度指标,在短周期区域,相关系数大小呈现Ⅰ<Ⅱ<Ⅲ<Ⅳ的特点;当T>2 s后,四类场地的相关系数随自振周期变化曲线趋势逐渐接近．对于位移类地震动强度指标,当T>3 s后,Ⅰ类场地和Ⅱ类场地的相关系数随自振周期变化曲线逐渐趋于一致,而Ⅲ类场地和Ⅳ类场地的相关系数随自振周期变化曲线也逐渐趋于一致．     

活细胞浓度和电导率测量系统设计

为了观察和记录生物活体的生长过程,设计了一种活细胞浓度和电导率测量系统.系统总体设计方案主要包括系统硬件设计、控制逻辑设计和上位机软件设计,硬件设计部分包括激励信号源的硬件组成、信号调理电路设计和采集传输电路设计,控制逻辑设计部分主要包括激励信号源工作模式配置、采集传输逻辑设计,通过对测量值与介电常数、活细胞浓度以及电...     

糖厂信息化建设的实践研究

为了解决糖厂生产效率低问题,本文对信息化技术应用进行研究,在明确糖厂信息化建设的意义基础上,提出在糖厂中进行信息化建设措施.在糖厂中合理应用信息化技术,不仅能够提高糖厂生产效率,而且可以增加糖厂的经济效益以及增强核心竞争力,希望本文对相关工作人员有所帮助.     

Syntheses,Crystal Structures and Antibacterial Activities of 5-Chloro-3-methyl-1-phenyl-1H-pyrazole-4-carboxylic Acid and Its Copper(Ⅱ) Compound

The title compounds 5-chloro-3-methyl-1-phenyl-1H-pyrazole-4-carboxylic acid(C11H9Cl N2O2, HL)(1) and [Cu(L)2(H2O)](2) were prepared and structurally characterized by elemental analysis, IR and single-crystal X-ray diffraction. Compound 1(C11H9Cl N2O2) crystallizes in the monoclinic system, space group P21/n with a = 7.249(3), b = 20.515(10), c = 7.249(3),β= 96.30°, V = 1071.6(9) ?3, Z = 4, Mr = 236.65, Dc = 1.467 g/cm3, F(000) = 488, GOOF = 1.029, μ= 0.341 mm-1, the final R = 0.0736 and w R = 0.1966 for 1500 observed reflections with I 2σ(I). Compound 2(C22H18Cl2Cu N4O5) crystallizes in the monoclinic system, space group P21/c with a = 7.2931(6), b = 24.548(2), c = 13.2726(11), β= 99.4040(10)°, V = 2344.2(3) ?3, Z = 4, Mr = 552.84, Dc = 1.566 g/cm3, F(000) = 1124, GOOF = 1.050, μ= 1.201 mm-1, the final R = 0.0376 and w R = 0.1000 for 3626 observed reflections with I 2σ(I). 1 and 2 are connected through hydrogen bonding interactions to generate 2D and 3D supramolecular structures, respectively. Moreover, the preliminary antibacterial activities of 1 and 2 against the gram positive bacteria(S. aureus, C. albicans and B. subtilis) and gram negative bacteria(E. coli and P. aeruginosa) have been tested by using the microdilution method, and the results indicate that 2 is more active than 1 against the tested bacteria.     

基于IEP框架的中国ICT管制绩效对比分析(英)

In order to conduct a comparative analysis on China's Telecommunications/ICT regulation effectiveness to make up the omission of international researches,and to find out the difference between China and other countries and try to improve China's ICT regulation effectiveness,this paper developed an extended,integrated ICT regulation effectiveness assessment framework,with a name of IEP framework that consists of three assessment directions,namely regulation institution,regulation enforcement and industry performance.Based on this framework and by using Entropy Method,the paper then selected 10 sample countries,including China,six developed countries,and other three developing countries,and made a comprehensive comparison evaluation for those countries.Finally,by focusing on China's results of ranking 10 in institution,6 in enforcement,5 in performance and 8 in total ranking,the paper gave the explanation and presented improvement suggestions for the future ICT regulation in China.     

新形势下广播电台新闻的采编技巧

近年来,随着科学技术和经济的不断发展,全球化不断加速,信息的传播和交流有了新的特点.广播电台这一新闻媒介作为政府和党的说话工具,人民的传话筒,承担着重要的作用,可以有效地传达党和政府的政策和规章,也可以转达人民的意志.因此,广播电台就必须在激烈的媒体竞争中结合自身优势,把握好广播电台的发展路线,积极有效地承担起党和人民交流的重任.特别是新闻采编人员要根据实际的情况合理运用新闻采编技巧,提高采编质量,从而促进广播电台的发展.在面对新闻采编中存在的问题时,需要运用采编的技巧和策略加以解决,促进广播电台的良好发展.     

搅拌棒萃取-紫外可见分光光度法测定苋菜红

制备了以金属有机骨架MIL-101及其与氧化石墨烯的杂化材料MIL-101/GO为涂层的搅拌棒。以丙酮为解析剂,比较了2种搅拌棒对苋菜红的富集效果,结果表明以MIL-101/GO为涂层的搅拌棒有更大的富集倍数。优化了实验条件,借此建立了以搅拌棒萃取-紫外可见分光光度法测定微量苋菜红的方法,并进行了实际样品的测定。