基于Web的空气质量远程监控系统

介绍了基于Web的空气质量远程监控系统,该系统通过监控计算机对现场采集的空气质量数据进行实时监控,以较低的成本实现了对现场空气质量的远程监控.     

运用可编程控制器（PC）对模拟温室进行智能控制

介绍了模拟温室对温度、湿度、光照、二氧化碳浓度等环境因子要求的调控范围和调控精度，模拟温室中温度、湿度、光照、二氧化碳浓度等的监测系统和相应的调节系统，可编程控制器（PC）控制系统的硬件构成，系统控制程序的编写思路，模拟温室可编程控制器（PC）控制系统与继电器－－接触器控制系统和微机控制系统相比的优越性。     

基于传感网络的远程温度采集系统设计

温度是工、农业生产中常见的被控参数之一。温度的采集和监控在有些工农业的生产中占据着非常重要的地位。随着近年来网络的发展,远程的温度采集和监控得到了广泛的应用。一般传统的远程温度采集系统是由线路传输的,可是线路传输受到的限制非常大。如煤矿深井作业区,如果采用线路传输的方式,可能会遇到线路传输成本高、施工周期长等问题,甚至还会遇到根本无法施工的难题。那么就需要一种新的远程温度采集系统来代替传统方式。本文通过对远程温度采集系统的设计,解决了传统有线式远程温度采集系统的一些局限性和根本无法使用的难题。本文设计的系统主要包括以下两个系统,无线传感器网络系统和温度信息采集系统。无线传感器网络系统完成是对采集来的温度信息进行数据化分析和计算以及通过网络远程的信息传送;温度信息采集系统是用来温度采集,把采集来的信息传输给控制系统。本文设计的传感网络远程温度采集系统结构简单实用、功能齐全,通用性强,可被应用于许多领域。     

光照对采后蔬菜呼吸强度变化的影响

[目的]研究光照对贮藏期蔬菜呼吸作用的影响.[方法]以各蔬菜的最佳低温贮藏保鲜温度为参照,从高温到低温依次对每一种供试蔬菜设定3个温度梯度,分别对同梯度温度下青椒、西兰花、花椰菜、双孢菇在黑暗和光照下的呼吸强度进行比较.[结果]在设置的同一温度梯度下,与黑暗条件相比,光照可不同程度地降低青椒、西兰花的呼吸强度,但光照对花椰菜、双孢菇呼吸强度的影响不显著;同时光照对贮藏期蔬菜呼吸强度的影响还与贮藏温度有关,贮藏温度越低,光照对蔬菜呼吸作用影响越小.[结论]适当光照能降低离体果蔬的呼吸强度,对果蔬贮运具有重要意义.     

石灰浆制备装置的下位机控制系统设计

设计一套石灰浆制备系统电气控制系统,下位机部分采用浙大中控WebField ECS-100软件控制.下位机系统具有独立运行功能,现场数据的采集和现场设备运行石油本地手动控制,也可以远程DCS自动控制,与上位机DCS系统进行通信,实现上位机DCS的远程监控.     

首钢京唐钢铁公司无人值守物资计量系统

无人值守物资计量系统于2009年在首钢京唐钢铁联合有限责任公司应用,系统采用RFID、物联网、可编程计算机控制器(PCC)等关键技术和设备,实现了车号智能识别、数据远程采集、计量过程远程监控、设备远程控制和智能化协作,达到了节员增效和对计量员集中管理的目的,同时避免了现场计量的种种弊端和漏洞,加快了物资信息传递速度,规范了计量业务流程,提高了公司的物流速度和管理水平。     

玉溪矿业公司生产数据实时监控与动态管理系统

针对玉溪矿业有限公司生产实际开发了一套生产数据实时采集、远程监控、动态管理系统.该系统是基于三层体系结构的集成化ERP系统,适用于采选型金属矿山生产数据的实时采集、远程监控和动态管理.系统可实时采集采矿、选矿、质检、化验、计划部、生产部、矿产资源部等单位的原始数据,提供远程分布式监控,实时图表,异地上报与动态管理.     

基于Socket的整流装置远程监控系统

针对整流装置运行环境恶劣、故障率高和维护困难的特点,开发了一种远程监控与故障诊断系统。该系统由客户端和服务器组成,客户端负责采集数据、下达指令;服务器软件采用组态方式开发,实现整流装置的在线监控、故障诊断报警、数据综合管理等。服务器与客户机之间采用Socket编程进行远程通信,并在数据传输中定义心跳包,用于检测通信状态,以保证通信和数据传输的正常。     

石油管道泄露远程仪表信号特征采集方法研究

采用远程仪表监测方法进行石油管道泄漏监控的重要环节是进行石油管道的泄露传感信号特征采集,提出一种基于自适应时频特征提取的石油管道泄露信号特征采集方法。采用2个16通道DMA压力传感器进行信号采集仪表系统设计,信号控制器仪表发射板的核心芯片为philips公司的D类功放芯片-TDA8920BTH,通过仪表系统硬件电路设计和信号特征采集算法改进,实现对石油泄漏远程监测仪的设计。研究表明,采用该方法进行石油管道泄露远程信号特征采集,能准确反映出石油管道的摄动信号、差压压力和绝压压力等特征,实现对泄露源的准确定位,信号处理能力较好。     

寄生性天敌蒲螨对梨小食心虫的控制研究

[目的]研究蒲螨对危害石楠的梨小食心虫的寄生能力和田间防治效果.[方法]进行蒲螨对梨小食心虫的室内侵染试验以及野外防治试验,观察蒲螨的寄生能力及活动特性,研究湿度、温度等环境因子对蒲螨寄生能力的影响.[结果]在适宜的条件下蒲螨对梨小食心虫有良好的防治效果;在不同的温度、湿度务件下蒲螨对寄主的搜寻能力存在差异,湿度对蒲螨活动能力影响较大,而温度对蒲螨个体活力影响较大.[结论]蒲螨对梨小食心虫的控制是有效的.     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)