基于LabVIEW的网络实验仪器的开发

基于LabVIEW的网络虚拟实验仪器的开发是为了解决传统实验系统数据处理能力弱和远程数据采集上的不足等问题而提出的。就LabVIEW虚拟仪器开发平台下网络实验仪器的开发方法作了介绍，对开发过程中的数据采集和网络通讯这两个关键技术作了详细阐述，并简单讨论了LabVIEW平台下数据处理编程的优越性。     

基于PCI-1710数据采集系统的研究与实现

本文介绍了一种基于研华多功能数据采集卡PCI-1710的计算机数据采集系统的设计，及其基于VB的数据采集软件开发方法。该方法能够充分发挥VB强大的数据库功能，在线创建使用者自己的测控数据库，给测控软件的开发提供了新的思路。     

一种基于HLA的通用数据采集系统框架研究

作为分布式仿真的国际标准,HLA正在军事领域的各个方面得到广泛的应用。首先对基于HLA的仿真系统基础理论进行了阐述,然后分析了基于HLA分布式仿真技术体制的仿真系统的数据采集的目的和要求,给出了数据采集的两种方案并对其优劣进行了分析和比较,最后对一种通用的数据采集系统框架进行了探索。     

基于双CPU结构的数据采集控制系统设计

提出了一种基于USB的便携式数据采集与控制系统设计方案。从USB数据采集控制器硬件及电路设计、USB固件开发、驱动程庭设计以及数据采集程序设计等方面介绍了数据采集控制系统软硬件的设计和实现。该系统采用双CPU结构,一个CPU负责进行数据的采集、滤波、计算等,另一个CPU作为总线接口实现与PC机的通讯。以此为核心设计的数据采集控制系统。具有测试精度高、可靠性好,使用方便、通用性强等优点。可用于各种场合的实时数据采集与控制。     

基于Matlab函数的数据采集系统设计与实现

信息化技术的发展,使计算机数据采集广泛应用于各个领域。极大地减轻了人员的开销,提升了生产开发效率。但传统的数据采集系统普遍存在数据采集面狭窄、数据分析逻辑性单一、相关数据采集算法兼容性差等一系列问题。根据Matlab函数的特性与传统数据采集系统存在的问题,提出一种基于Matlab函数的数据采集系统设计方案。我们采用了Matlab函数动态域值算法扩大了数据采集域,这大大提高了数据载入量;通过Matlab函数双维逻辑引擎设计,提升了算法的逻辑性。最后采用了Matlab函数动态兼容库设计,通过实时自学算法(TNZX-PRO)自动升级了数据信息并创建了兼容数据库。通过仿真实验证明:我们所提出的基于Matlab函数的数据采集系统设计,各项测试数据优异,能较好地满足数据采集要求。     

教学状态数据采集统计分析系统设计与实现

设计实现的教学状态数据采集统计分析系统分为数据采集、统计分析和数据查询三个模块。其中,数据采集和数据统计分析模块基于Excel VBA设计实现,数据查询模块基于B／S架构,以Access作为后台数据库、IIS5．0作为Web服务器,通过ASP编程开发。该系统能按照设计要求安全有效正确运行,操作简单、可扩展性好。该系统的开发使用进一步提高了本科教学状态数据的数字化、网络化管理水平,为本科教学评建工作提供了科学决策支持。     

基于智能小车的多用途数据采集系统设计

为降低野外数据采集劳动强度、提高效率,设计一种多用途无线检测系统,包含数据采集装置和上位机监控平台两部分。由四轮小车构建移动数据采集装置,并通过无线通信方式向上位机发送采样数据,借助VB工具开发上位机监控软件,通过无线传输及USB通信实时接收、显示、存储数据等。系统使用了16bit高精度A/D转换器,具有差分输入功能,采样结果准确、精度高,移动小车采样装置可以工作于远程遥控和超声波自主避障两种模式,用途广泛。     

基于LabVIEW的多物理量测量实验系统

温度和位移是物理量测量中两个重要的参数。传统的测量装置存在精度不高、体积庞大、操作不方便等缺点。为此,基于虚拟仪器设计开发了一种包括位移、温度在内的多物理量测量系统,系统以LabVIEW为软件开发平台,结合温度传感器、位移传感器、USB6008数据采集卡以及计算机搭建整个系统硬件平台,实现了数据采集、存储、分析处理和人机交互等功能。测量实验系统操作方便,测量过程直观,有助于学生了解实验原理和实现相应物理量的测量。实验结果表明,系统能够达到设计目标,具有较高的实用性。     

电梯远程监控系统研究

电梯是高层建筑不可缺少的设施,怎样确保电梯高效平稳运行是当今电梯技术研究的重要课题。根据电梯远程监控设计需求,基于系统化模块化设计思想,采用常见的客户端/服务器架构,将基于Linux的嵌入式系统作为前端数据采集发送平台。详细介绍了嵌入式开发过程,提出了开发环境搭建方案,编写了数据采集处理程序;重点对基于TCP/IP通信和Socket通信协议的网络软件进行了优化设计,并对网络通信性能作了分析检测,详细介绍了数据库的搭建和界面设计。     

基于MODBUS RTU协议的数据采集及控制模拟研究

通过对Modbus RTU协议的详细分析,基于AT91SAM7X256单片机功能,开发了一种关于抽油机控制器数据采集及模拟的上位机软件。以4~20mA的模拟量作为输入,按照一定规约转换后的工程值存储在AT91SAM7X256单片机的寄存器中,基于C#实现的上位机软件通过Modbus RTU协议进行数据采集,通过组态软件实现控制模拟。     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

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。     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

团图为数的图中的闭团贯数

Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F.     

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     

Social and Cultural Influence on Word Meaning

Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language.     

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.