Design and Realization of Power Quality Analyzing System

为实现对电能质量实时监测与管理,提高电力企业信息化水平,综合国内外多种电能质量评估系统的性能,文中设计并研发了一种电能质量在线分析管理系统,实现了电能质量评估工作的系统化、实时化,提高电力企业信息化水平,并为电能质量的控制奠定了基础。该系统基于.nET平台构建开发,分为表示层、业务逻辑层及数据管理层对代码进行优化管理。采用AdO.nET技术,通过统一的数据库管理数据,实现了系统管理、电能质量在线分析及自定义生成报表等功能。该系统具有多指标分析的完善性、自定义生成报表的灵活性、使用方便、界面友好等特点。In order to achieve real-time supervision and management of power quality,enhance informationize level of power enterprises,synthesized the performance of many kinds of energy quality appraisal system on home and abroad,designed and developed one kind of power quality on-line analyzing management system.It realized systematization and timeliness of power quality evaluation work,enhanced informational level of power enterprises,and lay the foundation for power quality controlling.Fundamentally based on the.NET platform,meanwhile it was divided into the presentation level,the business logic level and the data management level,and realized the optimized management to the code.Adopting the ADO.NET technology and unifying database for data management,realized functions such as system administration,power quality online analyzing and custom report generating.The system has characteristics of perfection in multi-index analyzing,flexibility in custom report generating,easy to maintain and user friendly

Design and Development of Power Quality On-line Analyzing System

为实现对电能质量实时监测与管理,提高电力企业信息化水平,同时也为电能质量的控制奠定基础,本文设计并研发了一种电能质量在线分析系统。该系统基于.nET技术分三个层次构建,采用AdO.nET与gdI+等技术实现,支持电能质量指标查询、报表打印、设备管理等功能。本系统具有多指标分析的完善性,自定义生成报表的灵活性,使用方便,界面友好等特点。In order to achieve real-time supervision and management of power quality,enhance informationize level of power enterprises,meanwhile lay the foundation for power quality controlling,this paper designs and develops a kind of power quality on-line analyzing system.Employing technologies such as ADO.NET and GDI+,the system is fundamentally based on the.NET three-layer framework;supports many functions such as inquiry of power quality index,report printing,device management,etc.The system has characteristics of perfection in multi-index analyzing,flexibility in custom report generating,easy to maintain and user friendly

二色桌片参酶解液对转化细胞的效应

用二色桌片参（Mensamariaintercedens）酶解液处理转化的人胚肺成纤维细胞（NLF）后，细胞生长受到显著抑制，抑制率达64．84％，光镜下细胞透光性加强，铺展较好，细胞核形更为规则，核畸形现象减少；线粒体结构趋于正常；软琼脂集落实验表明，细胞集落形成率由23ｘ10－5下降至12．5ｘ10－5，裸小鼠致瘤实验显示抑瘤率为82．39％，差异显著（p＜5％）。结果提示，二色桌片参酶解液可能逆转转化的HLF细胞的恶性表型，对其有一定的诱导分化作用

Catmull-Clark 曲面控制网格的收敛性质

文献[ 4] 给出Catmull-Clar k 细分曲面控制网格的收敛速率和一个误差计算公式. 本 文在这基础上提出一个新的算法, 并借助此新算法得到关于Catmull-Clar k 细分曲面控制网络的收 敛速率的更精确的估计和给出更好的误差计算公式国家自然科学基金计划( 10571145) 资

二色桌片参酶解液的抗胃癌细胞MGc80-3作用

用二色桌片参［Ｍｅｎｓａｍａｒｉａｉｎｔｅｒｃｅｄｅｎｓ（Ｌａｍｐａｒｔ）］酶解液处理培养的人胃腺癌细胞ＭＧｃ８０－３后有如下效应：对其生长的抑制率可达３２．７５％，经处理后细胞铺展更好，透光性较好，细胞表面较光滑，微绒毛少，核膜规则而光滑，核仁明显．在软琼脂中的集落形成率由０．０１６７％下降为０．００４５％．Ｃｏｎ－Ａ介导的细胞凝集率在１００μｇ／ｍＬ浓度中下降４０．２个百分点，在２００μｇ／ｍＬ中下降３５．４个百分点；对裸小鼠致瘤的瘤重下降３３．０７％．结果表明二色桌片参酶解液对该胃癌细胞的生长有一定的抑制作用，对其恶性表型有一定的逆转作用

Determination of fungicide anilinopyrimidine residues in food by series solid phase extraction-high performance liquid chromatography-tandem mass spectrometry

建立了食品中嘧啶胺类杀菌剂嘧霉胺、嘧菌胺及嘧菌环胺残留的串联固相萃取-液相色谱-串联质谱(HPlC-MS/MS)检测方法。胡萝卜、辣椒等样品经乙酸乙酯提取,石墨化炭黑-弗罗里硅藻土串联固相萃取柱(EnVI-CArb-flOrISIl SPE)净化后,在HPlC-MS/MS仪上进行检测分析,采用外标法定量。质谱分析采用电喷雾电离,正离子扫描,多反应监测模式。结果表明,柱净化后无明显的基质效应,嘧霉胺、嘧菌胺和嘧菌环胺在1~20μg/l内相关系数可达0.999 0以上,具有良好的线性关系;每种杀菌剂选择两个离子对,其中一组用于定量:嘧霉胺M/z 200.1/107.1,嘧菌胺M/z 224.0/106.0及嘧菌环胺M/z 226.0/108.1;另一组用于确证:嘧霉胺M/z 200.1/183.1,嘧菌胺M/z 224.0/131.1和嘧菌环胺M/z 226.0/133.1。样品中添加0.1、0.5、1.0μg/kg的标准品,其回收率为73.2%~98.7%,相对标准偏差(n=10)小于10%;嘧霉胺、嘧菌胺、嘧菌环胺的检出限(信噪比(S/n)=3)均为0.03μg/kg;嘧霉胺、嘧菌胺、嘧菌环胺的定量限(S/n=10)均为0.1μg/kg。实验结果表明,该方法提取效果好,具有良好的灵敏度、回收率和重复性。A high performance liquid chromatography-tandem mass spectrometry(HPLC-MS/MS) method was established for the determination of fungicide anilinopyrimidine residues including pyrimethanil,mepanipyrim,and cyprodinil in foodstuffs with series solid phase extraction(SPE).The food sample was first extracted with ethyl acetate,and then purified by an ENVI-Carb cartridge and a Florisil SPE cartridge.The analytes were determined by HPLC-MS/MS and quantified by external standard method.The mass spectrometric detection was operated with electrospray in positive ionization mode and the fungicide anilinopyrimidines were identified in multiple reaction monitoring(MRM) mode.The linear range of the method was 1-20 μg/L,with the correlation coefficient(r2) over 0.9990.The transitions of the precursor ions to two selected product ions were involved,in which one group for quantification were m/z 200.1/107.1 for pyrimethanil,m/z 224.0/106.0 for mepanipyrim and m/z 226.0/108.1 for cyprodinil,and the other group for identification were m/z 200.1/183.1 for pyrimethanil,m/z 224.0/131.1 for mepanipyrim and m/z 226.0/133.1 for cyprodinil,respectively.No significant matrix effect was found for spiked samples after the purification.The recoveries of the fungicide anilinopyrimidines spiked in food samples were 73.2%-98.7% at the spiked levels of 0.1,0.5,1.0 μg/kg.The relative standard deviations(RSDs) were less than 10%.The limits of detection(LODs) and limits of quantification(LOQs) were 0.03 μg/kg and 0.1 μg/kg for the three fungicides,respectively.The results showed that the proposed method is sensitive and accurate for the determination of fungicide anilinopyrimidines in foodstuffs.The method should be applicable for routine analysis of pyrimethanil,mepanipyrim,cyprodinil residues in foodstuffs.厦门市科技计划项目(3502Z20092009、3502Z20102013);国家质检总局科技计划项目(2010IK192

Determination of Dithiocarbamates in Foodstuffs by LC-MS/MS

通过优化质谱、液相色谱和萃取缓冲液等条件,建立了一种简单、快速、灵敏测定食品中二硫代氨基甲酸酯的方法。在优化条件下,代森锌(EbdC)、丙森锌(PbdC)的线性范围为2~100μg/l,相关系数均不小于0.997。在花椰菜、萝卜和豌豆中EbdC和PbdC的检出限(S/n>3)为2μg/kg;萝卜和豌豆中Eb-dC和PbdC的定量下限(S/n>10)为10μg/kg,而花椰菜中EbdC和PbdC的定量下限(S/n>10)为15μg/kg。在花椰菜、萝卜和豌豆基质中加标5~100μg/kg的EbdC和PbdC时,测定加标回收率为83%~96%,相对标准偏差为4.4%~10.5%,方法可满足定量分析的要求。A simple,fast and sensitive method was developed for the determination of dithiocarbamates,including tiezene(EBDC) and pestanal(PBDC),by optimizing the parameters of LC-MS/MS and extraction buffer.Under the optimized conditions,the calibration curves of EBDC and PBDC were linear in the range of 2-100 μg/L with correlation coefficients not less than 0.997.The limits of detection(LODs,S/N>3) of EBDC and PBDC were 2 μg/kg for cauliflower,turnip and pea,and the limits of quantitation(LOQs,S/N>10) of EBDC and PBDC were 10 μg/kg for turnip and pea,and 15 μg/kg for cauliflower.The recoveries in cauliflower,turnip and pea samples at spiked concentration levels of 5-100 μg/kg ranged from 83% to 96% with relative standard deviations(RSDs) of 4.4%-10.5%.The method could meet the requirement for the analysis of dithiocarbamates in foodstuffs.厦门市科技计划项目(3502Z20092009;3502Z20102013); 国家质检总局科技计划项目(2010IK162;2010IK192

Enhanced Visible Light Photoelectrochemical Performances with Nitrogen Doped TiO_2 Nanowire Arrays

成功制备了氮掺杂锐钛矿TiO2纳米线,并研究了它的光电化学性质.结果表明,与商用P25 TiO2纳米粒子和未掺杂TiO2纳米线相比,氮掺杂TiO2纳米线作为光阳极明显地提高了光电转换效率(IPCE%),在可见光区有明显光吸收;在100 mW/cm2可见光光照下,氮掺杂TiO2纳米线具有最大的光电流密度和能量转换效率.例如,当电压为0.09 V(vs.Ag/AgC l)时最大能量转换效率为0.52%,均高于未掺杂TiO2纳米线和商用P25 TiO2纳米粒子的,充分表现出它优越的光响应和光电化学性能,在光电化学池、太阳能制氢等方面具有广泛的应用前景.Self-organized anodic anatase TiO2nanowire arrays doped with nitrogen have been successfully fabri-cated and their photoelectrochemical(PEC) properties have been characterized and found to be substantially im-proved compared to undoped nanowires or commercial P25 nanoparticles.Photocurrent measured with monochro-matic incident light showed that the incident photon-to-current efficiency(IPCE,%) values of nanowire arrayelectrodes with or without N-doping were obviously higher than that of commercial P25 nanoparticle electrodes,and nitrogen-doped TiO2nanowire arrays(NTNA) had noticeable absorption in the visible region.The NTNAelectrodes showed the highest photocurrent density and power conversion efficiency under 100 mW/cm2visiblelight illumination.A maximumolphotoconversion efficiency of 0.52% was achieved for the NTNA sample at anapplied potential of 0.09 V versus Ag/AgCl(saturated KCl) electrode under visible illumination,much higherthan that of the undoped nanowire and commercial P25 nanoparticle electrodes.These results demonstrate thatNTNA thin films are promising for enhancing the photoresponse and effectively improving PEC performances ofnanostructured TiO2in the visible region for different applications including solar hydrogen generation.作者联系地址：清华大学化学系;美国加利福尼亚大学Santa Cruz分校化学与生物化学系;Author's Address: 1.Department ofChemistry,Tsinghua University,Beijing100084,China;2.Department ofChemistry and Biochemistry,University ofCalifornia,Santa Cruz,California95064,US