地下水污染物迁移自动化监测系统设计

针对传统地下水污染监测采用单点抽测方法、自动化程度低下、无法迅速进行迁移趋势分析的现状,设计了基于LabVIEW的地下水污染物迁移自动化监测系统。系统以研华PCI-1711U数据采集卡为核心完成硬件与软件设计,可实现基于LabVIEW的数据自动连续采集、信号处理、监测系统分析以及报告输出的程序设计。仿真实验表明：该系统能自动高效地监测地下水污染物,并作出直观、清晰的污染物迁移趋势分析,功能丰富且易于扩展,在地下水监测与环境保护等方面具有广阔的应用前景。     

基于LabVIEW的林用集材车底盘全液压驱动测试系统设计

为了实现对林用集材车底盘全液压驱动系统的压力、流量等参数的自动采集测试与监测,基于LabVIEW软件平台及数据采集卡等硬件基础,设计搭建了林用集材车底盘全液压测试系统,实现了工作数据实时采集、存储、监测及阈值预警。尝试使用更加全面、精确的软件虚拟仪器代替实际测量仪器,通过系统液压泵站对测试对象进行压力与流量等参数标定,进行了系统自动采集与手动数据采集实验。经对比,系统测试压力与流量精度分别可达96.61%、96.2%,大大提高了数据采集精度,实现了模块化和自动化测试及预警功能,具有良好的可靠性。     

选矿自动给水控制系统中转换器的选择及设计

数据的采集与处理广泛地应用在自动化领域中,由于应用的场合不同,对数据采集与处理所要求的硬件也不相同,在控制过程中,有时要对几个模拟信号进行采集与处理。本文对选矿自动给水控制系统中转换器的选择及设计进行了研究。     

基于LabVIEW的巨磁阻抗自动测量与数据处理系统开发

以精密阻抗分析仪、可编程直流稳压电源和亥姆霍兹线圈为基础仪器,基于LabVIEW虚拟仪器技术开发了GMI自动测量和数据自动处理系统。该测量系统的优点是自动采集、整理数据,生成Excel报表;自动对数据进行处理,即时呈现GMI特性曲线。节约人工数据整理及处理时间,方便用户对材料GMI性能及时作出评价。该测量系统操作简便,运行稳定,自动化程度高,适用于材料GMI效应的自动测量和分析。     

基于虚拟仪器的汽车自动变速器运行监测系统设计与应用

针对2000年出厂广州本田雅阁2.3VTi-L轿车自动变速器,设计了基于虚拟仪器平台的汽车电控自动变速器运行状况监测系统,可实时监测和了解自动变速器运行状况.通过采集的数据作后处理分析,掌握变速器技术状况,对故障分析有一定的辅助作用.     

PLC与GPS接收器通讯及定位数据采集技术设计

通过设计基于PLC技术的数据采集系统和相应的算法,利用RS-232接口与GPS接收器进行通讯,完成实时分析和计算,自动采集GPS接收器采集到的位置信息.该系统通过以PLC核心控制器,利用通讯、数据分析技术等实施数据采集和利用,获得的定位数据可广泛应用于各类有地理位置信息需求的自动化控制系统.     

一种基于用户浏览行为的数据采集方法

提出了一种基于用户浏览行为的客户端数据采集方法,普通浏览者访问图书馆网络监测系统服务器端网页时,浏览器自动运行嵌入在网页中的JavaScript代码.通过JavaScript代码的运行,普通浏览者与采集中心进行连接和数据传送,实时地采集用户行为数据,实时地统计汇总网站的最新状态数据.该数据采集方法对被监测网站服务器运行效率没有影响,其优点在绍兴图书馆网络监测系统得到了验证.     

基于大数据的计量平台模拟应用系统开发的研究

本系统是集大数据技术、信息技术、数据可视化技术、自动化技术于一体的综合性工程系统。以企业计量为基础，以节能减排为主线，以自动采集、智能存储、科学决策、智慧应用为目的的计算机科学决策支持系统，其中提出多个技术模型，分别计量大数据“双”五级计量结构模型、数据的基础模型、运行监测和预测的智能模型、科学决策的智慧模型，最终形成企业“节能+减排”创新应用的新格局与管理理念和综合计量服务平台。     

一种基于高斯算法自动校准的多传感器磅秤系统

为了简化传统多传感器磅秤系统的调试校正流程,本文基于线性高斯算法,使用微控制器自动采集传感器数据并进行数据拟合,求解出多组较优应变参数,从而替代手动调节过程,实现了多传感器磅秤系统的调试校正自动化.     

基于S7-200PLC的牲畜圈舍自动控制系统设计

针对目前牲畜圈舍养殖环境卫生差、管理粗放、影响牲畜养殖效益的问题,对牲畜圈舍进行技术改造,设计了一套牲畜圈舍自动控制系统。将S7-200PLC作为系统控制的核心,通过温度传感器对环境温度进行采集和转换,采用MCGS组态软件设计控制界面,对温度信息进行实时监测,并实现牲畜圈舍粪便的自动清扫、温度自动调整、自动喂水排水等控制功能。通过实验室制作模型进行了模拟运行,此系统操作简便、可靠性高,能够实现对牲畜圈舍的自动化管理。     

汉字倒说

汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

钱生钱!

我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

Inequalities for inscribed simplexes

The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

微薄的薪水,高尚的情操

现在,我们可以没有面包,没有钱,没有房子,没有车子……但我们唯独不能丢失的是高尚的情操,笃定的信念,还有,满满的希望!     

Virtual reality approach for 3D large model browsing on web site

Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching.