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

Design and Implementation of Power Quality Management System

在现代社会生活中，电能是一种使用最为广泛的能源，其应用程度是一个国家发展水平的主要标志之一。然而，现代电力电子设备和非线性负载的大量使用又造成电能污染日趋严重，电能质量成为电力部门及其用户日益关注的问题。建立符合我国实际情况的电能质量数据管理及实时监测系统也显的犹为重要。 电能质量的监测数据分为两种类型：对于有固定监测装置的监测点，监测数据直接导入数据库存储；对于未安装固定监测装置的测量点，由于测量的不固定性，因而监测数据按照监测标准存入到数据文本文件。这两种数据构成了本文所构建系统的数据源。 本文首先分析了电能质量问题的产生原因并介绍了国内外电能质量分析软件的发展情况，以及有关电能质量的...In modern social life, power is the most widely used energy source, the extent of its application development level has been a country’s main landmark. However,the use of modern electronic equipment and nonlinear load made the power increasingly serious polluted,power quality has been more and more concerned to the electricity sectors and its customers. Establishing power quality data management a...学位：工学硕士院系专业：信息科学与技术学院计算机科学系_计算机系统结构学号：2302007115129

Establishes Method of Avermectin in Four Tissues of Pseudosciaena crocea by High Performance Liquid Chromatography with Fluorescence Detection

建立了大黄鱼肌肉、肝脏、鳃和血液中阿维菌素的高效液相色谱-荧光检测(HPlC-fld)法.样品用乙腈提取,正己烷脱脂,经碱性氧化铝固相萃取(SPE)柱过滤,1-甲基咪唑和三氟乙酸酐的乙腈溶液在室温下避光衍生化,再经甲醇水解,进行HPlC-fld测定.结果表明,阿维菌素在0.5~50.0μg/l范围内线性良好,检测限为肌肉0.5μg/kg,其他组织1.0μg/kg.添加5.0~50.0μg/kg时,平均回收率为:肌肉81.2%~87.1%,肝脏68.9%~74.4%,鳃67.6%~80.7%,血液52.4%~60.3%,日内精密度和日间精密度分别为:肌肉4.6%~5.5%、6.1%~6.8%;肝脏5.5%~6.2%、7.6%~8.7%;鳃5.1%~6.3%、6.9%~7.5%;血液7.6%~8.9%、9.7%~11.6%,该方法能满足现行兽药残留分析要求.In order to understand the avermectin residues in the tissues of Pseudosciaena crocea,a method for the quantitative determination of this drug in fish muscle,liver,gill and blood sample was established using high performance liquid chromatography with fluorescence detection(HPLC-FLD).The procedures for sample treatment included extraction by acetonitrile,delipidation by n-hexane,clean-up by Basic Alumina solid phase extraction cartridge and derivation by 1-methylinidazole and trifluoroacetic anhydride inacetonitrile at room temperature away from light and hydrolysis by methanol.Samples were analyzed by HPLC coupled to a fluorescence detector.The results indicated that the calibration curves were linear within the working range from 0.5 to 50.0 μg/L.The limit of detection of the method for avermectin in muscle was 0.5 μg/kg,and 1.0 μg/kg for the other three tissues.When 5.0-50.0 μg/kg samples were added,the overall recoveries of avermectin in Pseudosciaena crocea muscle,liver,gill and blood sample were respectively 81.2%-87.1%,68.9%-74.4%,67.6%-80.7%,52.4%-60.3%.The intra-day and inter-day coefficient variations for muscle,liver,gill and blood sample detection were 4.6%-5.5% and 6.1%-6.8%,5.5%-6.2% and 7.6%-8.7%,5.1%-6.3% and 6.9%-7.5%,7.6%-8.9% and 9.7%-11.6%,which meet the current requirements for drug residue analysis.This research provides a reference for the detection of avermectin for the tissues of P.crocea.国家公益性(农业)行业专项(200903029

Observation on the Life History of Cryptocaryon irritans in Eastern Sea of Fujian and Research on Antiparasitic Effect of Acetic Acid

近年来,由刺激隐核虫(CryPTOCAryOn IrrITAnS)感染引发的“白点病“为闽东大黄鱼(PSEudOSCIAEnA CrOCEA)养殖业带来连续重大损失.大量针对该病的研究工作已经开展,但仍未找到治疗“白点病“安全、有效的方法.本实验从福建省福鼎市八尺门海域取得一种寄生虫,通过形态学及分子生物学相关鉴定方法,证明了所取寄生虫为刺激隐核虫.利用乙酸对大黄鱼幼鱼进行药物安全性评价,同时开展杀灭不同生活史阶段刺激隐核虫的时间效应与剂量效应实验.结果显示:刺激隐核虫包囊对乙酸的耐受力显著强于幼虫,乙酸在杀灭幼虫的同时,对大黄鱼幼鱼也有一定的刺激作用,因此在实际用药中应严格控制剂量.根据实验结果,建议在生产中防治“白点病“时,要以刺激隐核虫幼虫为目标,使用157.4Mg/l乙酸,累计处理2H,可以有效杀灭全部幼虫,又不会对鱼体造成危害,是一种治疗“白点病“的安全用药策略.Cryptocaryon irritans,a holotrichous marine ciliate protozoan that causing "white spot disease",is one of the most devastating parasites of marine fish in Fujian Province.In the present study,a strain of C.irritans-like parasite was isolated from Pseudosciaena crocea aquiculture areas in eastern Fujian province and then identified.The morphological features and biochemical characteristics of the parasites were identical to those C.irritans strains which had been reported in other places,this fact suggested that the sampled pathogen was C.irritans.In addition,the acute toxicity of acetic acid to juvenile P.crocea and C.irritans was studied.The results showed that C.irritans theronts were more sensitive to acetic acid than tomonts.Meanwhile,the susceptibility of acetic acid to juvenile P.crocea was an important factor which was considered in the process of killing C.irritans.The results indicated that dealt "white spot disease" infected P.crocea with 157.4 mg/L acetic acid for 2 h could kill C.irritans theronts effectively as well as unharmful to the hosts,it was a safe drug-using strategy for preventing and curing "white spot disease".公益性(农业)行业专项(200903029); 国家科技支撑计划项目(2011BAD13B08); 广西科技攻关计划项目(桂科攻1222013-2