吸湿凉爽机织物的结构设计与性能

为研究织物组织结构与复合纱线线密度对织物凉爽性能的影响,将线密度为7.4和9.8 tex涤纶分别与线密度为7.8 tex锦纶反向加捻、并线后作为纬纱,以8.3 tex涤纶/竹浆纤维50/50混纺纱作经纱,设计平纹、二上一下斜纹和透孔组织织物.测试织物的瞬间接触凉感、热湿舒适性能及织物干、湿态升温曲线,并采用凉爽温度指数对织物的综合凉爽性能进行评价.研究结果表明:6种设计织物的瞬间接触凉感均高于标准,且平纹织物最好,纬纱粗细对瞬间接触凉感影响不显著;透孔织物透气性最好,且在人体出汗的状态下具有较好的导湿散热性能.平纹织物凉爽温度指数最高,最大凉爽温度为2.8℃,综合凉爽性能最好.     

Optical imaging of anatomical maps derived from magnetic resonanceimages using time-independent optical sources

Presents a model suitable for computing images of absorption cross sections of thick tissue structures illuminated at near infrared (NIR) wavelengths from tomographic projection data. Image reconstruction is accomplished by solving a system of linear equations derived from transport theory. Reconstruction results using different algebraic solvers are shown for anatomical maps of the breast, derived from magnetic resonance imaging data, containing two simulated pathologies, in which case qualitatively good reconstructions were obtained. Evaluation of magnetic resonance (MR) data to optimize NIR optical tomographic imaging methods and to assess the feasibility of a combined MR-optical measurement scheme is discussed     

Application of asymptotic waveform evaluation to eigenmode expansion method for analysis of simultaneous switching noise in printed circuit boards (PCBs)

In this paper, the asymptotic waveform evaluation (AWE) technique is first applied to the conventional eigenmode expansion method for characterizing a power/ground (P/G) plane pair and analyzing the simultaneous switching noise on such plane pairs for printed circuit boards or multichip modules. The application of AWE avoids a large number of iterations in computing the impedance frequency response of a P/G plane pair structure and greatly reduces the computation time. Meanwhile, to obtain an accurate solution in an entire frequency range, we employ the complex frequency hopping technique which can help select multiple expansion points. In addition, the proposed approach can also be used to characterize the P/G plane pair structures with irregular shapes. Three examples demonstrate its high efficiency and good accuracy.     

种分Δα_k与精液Al_2O_3浓度的关系

对烧结法和拜尔法种分槽的Δαk 变化进行了概述 ,阐述了精液Al2 O3 浓度关系到晶种分解的产出率、分解率、氢氧化铝粒度及系统的液量平衡、能耗等 ,生产中要把握这些影响因素 ,确保氢氧化铝晶体的长大速度为正值。     

90平米开启住宅新时代

大力发展90平米以下中小套型住宅，不仅具有重大的现实意义，而且将对我国住宅建设的发展产生深远的影响。[编者按]     

金湖县防汛信息化的现状分析与对策研究

水利信息化作为水利现代化的基础和标志,是防洪减灾、水资源管理、水环境监测和水土保持的重要手段和技术支撑,是提高水利管理工作效率和效能、实现水利服务社会的重要途径和必然要求,是改造传统水利、促进水利改革与发展的重要措施和迫切需要.阐述了目前水利工程现状和非工程措施建设现状,存在的问题及需求分析,并提出相关解决对策.     

基于ASP.NET的报告单管理系统

该文介绍使用ASP.NET技术开发报告单管理系统,对报告单管理系统的需求和设计进行了分析和阐述,并解释了实现的关键技术。     

钛酸铋基陶瓷的光致变色及荧光调控行为研究

利用高温固相方法制备了 Pr掺杂的Bi4Ti3O12多功能陶瓷材料.研究结果表明:Pr离子的引入使得Bi4Ti3O12呈现典型的绿光(494 nmn)和红光(613 nm)发射.在407 nm的光辐照下,样品呈现出了由棕色到灰色的颜色转变,同时荧光发射的强度显著下降.当Pr的质量分数为0.015时,荧光变化率ΔR1分别为59.85％(494 nm)及66.83％(613 nm).在交替使用407 nm光辐照和200℃热刺激下实现了可逆的光致发光调控.