论合体女式上衣结构设计与纸样——以双排扣小立领款式为例

主要通过设计、打板、制作一件双排扣小立领款式,来分析该款式的款式特点、规格设计和主要部位在结构上的处理,以此强调领和袖子在服装设计中的重要性,最后通过款式的全面分析得出合体女式上衣的结构设计与纸样。     

Design of small-area and high-efficiency DC-DC converter for 1 T SRAM

The direct current-direct current (DC-DC) converter is designed for 1 T static random access memory (SRAM) used in display driver integrated circuits (ICs), which consists of positive word-line voltage (V _PWL), negative word-line voltage (V _NWL) and half-V _DD voltage (V _HDD) generator. To generate a process voltage temperature (PVT)-insensitive V _PWL and V _NWL, a set of circuits were proposed to generate reference voltages using bandgap reference current generators for respective voltage level detectors. Also, a V _PWL regulator and a V _NWL charge pump were proposed for a small-area and low-power design. The proposed V _PWL regulator can provide a large driving current with a small area since it regulates an input voltage (VCI) from 2.5 to 3.3 V. The V _NWL charge pump can be implemented as a high-efficiency circuit with a small area and low power since it can transfer pumped charges to V _NWL node entirely. The DC-DC converter for 1 T SRAM were designed with 0.11 μm mixed signal process and operated well with satisfactory measurement results.     

电动汽车接入电网技术综述

介绍了电动汽车接入电网的相关概念和系统架构,阐述了其在调峰服务、旋转备用服务、调频服务和储能服务等方面的优势,进一步分析了其经济价值和社会价值.总结了电动汽车的接入对电网规划和输配电网的影响,并指出了其中的关键问题及研究重点.     

浅析小电流接地系统暂态选线新方法

文章介绍了国内小电流接地系统故障选线方法的的发展简况,在分析小电流接地故障暂态特征的基础上对近几年提出的几种较新的基于暂态特征信息的选线方法进行了简单的评述,同时筒略说明了不足之处.文章最后提出了一种基于暂态能量函数的小电流接地选线方法,并有待于进一步研究.     

Accurate mirror-based camera pose estimation with explicit geometric meanings

An accurate closed form solution is proposed to estimate camera pose by several mirrored reference object images acquired via a planar mirror under different unknown poses. Compared with state-of-the-art methods, our method is more accurate when there are more than three images and has explicit geometric meanings. This method also properly handles cases in which some of the mirror poses are parallel. The central idea is to minimize an error metric based on all reflections of rotation, which enables the camera rotation to be estimated directly by SVD of sum of mirrored camera rotations. After that, the camera translation is computed by solving a large system of linear equations to minimize object space collinearity error. Both synthesized data and real data experiments show the advantages of our approach.     

论警察的文学形象——公安文学叙事话语范式分析

公安文学作品中警察叙事的话语范式包括政治话语、日常话语、先锋话语、消费话语四种,它们各自表征着社会阐述我国警察的不同知识样式。但公安文学要健康发展并最终有利于中国警察的健康发展,必然要坚持对警察的正义姿态和英雄精神的叙述,也即必然要形成以政治话语范式为主导的警察叙事。     

Quaternary Ammonium Salts (QAS) Modified Polysiloxane Biocide Supported on Silica Materials

Three types of silica particles modified with vinyl groups were obtained: (i) xerogel formed by hydrolytic polycondensation of the mixture of tetramethoxysilane (TMOS) and 1,1,1,7−tetramethoxy-3,5,7-trimethyl-3,5,7-trivinyltetrasiloxane, (ii) mesoporous silica obtained from the same precursors in the presence of the cetyltrimethylammonium bromide (CTAB), and (iii) commercial Fluka silica gel 60A with a vinyltriethoxysilane-treated surface. Vinyl groups on these silica materials were transformed into silyl chloride by hydrosilylation with HMe₂SiCl. These groups were used to graft living polysiloxane that was synthesized by anionic ring-opening polymerization of 2,4,6-tri(3-chloropropyl)-2,4,6-trimethylcyclotrisiloxane and initiated by BuLi. Chloropropyl groups on the grafted polymer were used to quaternize N,N-dimethyl-n-octylamine. Silica particles with grafted polysiloxane having quaternary ammonium salt (QAS) groups pendant to polymer chains were obtained. Silica material with QAS groups directly attached to the surface were generated by the action of N,N-dimethyl-n-octylamine on particles obtained by the sol–gel process involving tetraethoxysilane (TEOS) with 3-chloropropyltriethoxysilane. The bacteriocidal properties of all these materials were tested in water suspension against five representative strains for Gram-positive and Gram-negative bacteria. Some of the silica–polysiloxane hybrid materials have good antibacterial properties against Gram-positive strains, but not as good as the non-tethered QAS-substituted polysiloxane in water solution. The QAS groups that are directly bonded to the silica material surface are inactive.     

基于H.264整数变换和量化的研究与软件优化

首先介绍基于二维离散余弦变换(DCT)的4×4块的整数变换和量化的基本原理;然后在测试模型提供的变换和量化算法上做了一定的优化;最后验证新的4×4块的整数变换和量化算法比测试模型的算法在运算时间上更快,效率更高,而PSNR值基本没有变化,达到了提高编码效率的目的。     

Helmert方差分量估计在隧道贯通中控制导线平差的研究

为了探讨加测陀螺方位角后导线的定权和平差，根据现代测量平差理论中的Helmert方差分量估计法定权对加测陀螺方位角的井下控制导线进行平差．以上海415工程实例的贯通数据进行计算和验证，结果表明，Helmert方差分量估计定权与给定的先验中误差无关，总是收敛到一个相同的平差结果；先验中误差与Helmert方差分量估计定权的迭代次数或收敛速度有关；Helmert方差分量估计定权迭代平差，井下控制导线端点横向精度可提高约60％．