Fe－1．83C马氏体中碳的有序化──Ⅰ．普通有序相的晶体结构

采用电子衍射方法对Ｆｅ－１．８３Ｃ马氏体室温时效时产生的有序相结构进行研究，确定其结构为偏离化学计量成分Ｆｅ_４Ｃ的γ′－Ｆｅ_４结构，称为γ′－Ｆｅ_ｘＣ（Ⅰ）（ｘ＝４－１１）。碳原子位于单胞的１／２，１／２，１／２位置。该有序相单胞尺寸为：（ａ_Ｍ，ｃ_Ｍ分别为马氏体单胞的ａ和ｃ轴长度），它与母相完全共格，位向关系为（００１）_Ⅰ∥（００１）_Ｍ，［１００］_Ⅰ∥［１１０］_Ｍ。根据γ′－Ｆｅ_ｘＣ（Ⅰ）晶体结构计算出的有序相衍射花样与实验得到的衍射花样全部吻合。     

逆变式电焊机对电网污染的治理

分析了逆变式弧焊电源中输入侧三相整流滤流电路对谐波和功率因数的影响，介绍了改善谐波的方法以及滤波参数的设计计算。     

含氯N—芳基—α—氨基苄基磷酸的合成及其对钢铁缓蚀性能的研究

合成了四个新的含氯N—芳基—α—氨基苄基膦酸缓蚀剂，用元素分析、红外分析、^1HNMR、^31PNMR(核磁共振)确定了它们的结构，并用静态腐蚀实验(失重法)研究其在不同浓度及pH条件下对钢铁的缓蚀性能。     

面向维吾尔文的多模式匹配算法研究

维吾尔文多模式匹配算法是影响维吾尔文关键词过滤和检测性能的关键步骤之一.为此,考虑维吾尔文语法特点、书写方式、字母变换形式、特殊字母等因素,提出一种基于维吾尔文音节划分的多模式匹配算法.通过Bohum-sani函数的维吾尔语音节分解方法计算字符串音节数,利用Bohum-xekli函数得到字符串音节结构,按语法特点从右至左方式进行模式比较,实现维吾尔文多模式匹配.实验结果表明,与现有模式匹配算法相比,该算法具有更高的匹配效率.     

基于聋人案例的空间隐喻语义认知计算

我们从心理语言学的角度,对空间隐喻进行相似性分类和计算,使用多维量表和聚类方法,以聋人为被试分别进行了两个实验。实验结果表明,聋人为实现空间隐喻理解的计算,使用了地形空间和语法空间的特征信息,同时受手语语言特点的影响,其空间隐喻的认知主题包括手势者自身参照系、参照物的相对坐标系、手势空间的饱和度、以手部或胸部为边界。同时表明由于两种空间的存在,聋人大脑对空间隐喻的理解存在着层次,并且在长期使用手语交流的过程中,其地形空间和语法空间相互作用,影响了聋人大脑空间隐喻的结构和表征,从而导致了独特的高效快速空间隐喻计算。
     

防Baby如防匪？电脑护卫全攻略

家中有孩子,就犹如太平路上有了匪,时不时就要来劫掠一下,今天无意中偷窥到了我们的隐私,明天又乱下载了若干游戏将硬盘塞满了,后天又不知从哪里搞来个U盘,将PC搞得木马横行……如果不幸你也遇到了这样的“匪患”,不妨用下面的方法来防护一下。
　　以Win8.1系统为例。     

Treatment of wastewater from a school in a decentralized filtration system by percolation over organic packing media

Based on results obtained in the laboratory a WWTP composed of a septic tank and an aerated percolating filter packed with organic media was built for a school. The system can treat 18 m3 d(-1) and was operated with a hydraulic loading rate of 0.078 (m3 m(-2) d(-1). For 360 days different operational conditions including start-up; stabilization; operation with aeration and non aeration; effect of rainy season, breaks from activities due to holidays and restart; were monitored and described in the article. Once stabilized, the system was able to remove, without the need for mechanical aeration, 97% of BOD5, 71% of COD, 93% of TKN, 11% of PO(4-)-P, 95% of TSS, 96% of VSS, in addition to having a removal efficiency of 4 log units of Faecal Coliforms (FC) and 100% helminthes eggs (HE). With this quality, the treated wastewater can be chlorinated and reused to irrigate green areas and/or in toilets. Although sanitary wastewater has a high concentration of Total-N (250 mg L(-1)) and a C/N ratio of less than 1, the system removed 65% of Total-N. Finally it was observed that after non activity periods, there was neither system failure nor the need to re-stabilize the system.     

Screening of organic contaminants in urban snow

Snowmelt is known to cause peak concentrations of pollutants, which may adversely affect receiving water quality. High concentrations of metals and suspended solids in snow have been reported, whereas studies on organic pollutants are rare. This study aims at investigating the occurrence of anthropogenic organic compounds in urban snow in Gothenburg (Sweden). The most frequently detected organic pollutants in the collected snow samples were polycyclic aromatic hydrocarbons (PAHs), high molecular-weight phthalates, 4-nonylphenol and 4-t-octylphenol. Brominated flame retardants and chlorinated paraffins were only sporadically detected. In several snow samples, the concentrations of specific PAHs, alkylphenols and phthalates were higher than reported stormwater concentrations and European water quality standards. Pollutant source identification and sustainable management of snow are important instruments for the mitigation of organic contaminants in the urban environment.     

ESPRIT CAM功能简介

DP Technology公司是1982年由现任总裁Paul Ricard与CEO Dan Frayssinet一起创办,公司名称DP源于Dan和Paul这两位创始人的名字首字母。目前,DP Technology在加州和意大利的佛罗伦萨拥有成熟的产品研发团队,销售和技术支持网点遍布欧洲、亚洲以及南美和北美。DP Technology的亚太区总部位于中国上海,迪培软件科技(上海)有限公司是DP Technology设在中国的全资子公司。