VB编程实现微机的网络远程唤醒

网络远程唤醒对网络管理来说是一项具有实用性的技术。远程唤醒的方法也多种多样,在VB编程过程中,Winsock控件具有通过传输层协议进行微机的远程通信功能。根据Winsock控件能够发送带有该网卡MAC地址的唤醒数据包的特点,利用VB编程的方法,开发出实现微机网络远程唤醒的程序,以实现网络管理功能。     

MSComm控件在酸雨环境监测系统通信中的应用

本文给出了一种基于计算机和单片机远程通信的分布式网络结构，重点介绍中心站计算机应用MSComm控件读写串口，并控制Modem实现远程通信。本系统已用于环境监测部门。     

用V B实现计算机与单片机的串行通信

给出了使用VB控件,实现PC机与8031单片机之间串行通信的编程方法,并给出了个用VB实现PC机同8031通信的应用实例.     

基于VB和单片机的温湿度及火焰监控报警系统设计

本文介绍了运用VB6.0的MSComm控件完成计算机与单片机的串行通信,采用数字温湿度传感器和火焰传感器完成对数据的采集.单片机将处理后的数据上传到PC机,利用VB控件显示,并根据监测到的数据进行判断发送控制信号给单片机,进而驱动执行机构实现相应的控制.     

基于Visual Basic与RS232串行通信的温度监测系统

在VB的通信控件Mscomm属性设置和事件响应的基础上,在WindowsXP的环境下,利用通信控件实现与单片机串行通信,把单片机采集的温度上传到PC机,同时利用Visual Basic图片框控件PictureBox显示出来,达到对温度的实时监测的目的.     

基于单片机的高精度信号采集系统设计

介绍一种以单片机作为下位机采集数据,并经RS232串口传输到上位机--计算机的数据采集系统的实现方法.在VB开发环境下,运用VB提供的通信控件,实现PC机与89C51单片机之间的串行通信,并对采集的数据进行实时图形化显示、处理,存储等功能并给出硬件结构图和软件流程图.     

利用VB6.0实现PIC单片机与PC串行通信

本文介绍了利用VB 6.0实现PIC单片机与PC机串行通信的方法,分析了MSComm控件的各种属性,并给出了硬件连接图。     

基于VB的独立光伏运行数据采集系统

本文利用VB软件完成独立光伏发电系统的上位机部分设计,通过VB软件中的MSComm控件、Picture控件、Timer控件等控件实现系统的数据采集与远程监控。文中利用VB编程与RS-232口进行串行通信,实现了对现场数据的自动采集。重点利用vB编程实现串口通信,并且进行数据动态接收保存,将接到的数据赋值于全局变量,达到可以图表绘制曲线。实际运行表明,利用vB完成独立光伏发电系统具有动态显示功能强,可视性强,为故障预报与故障诊断模块提供了基础等优点。     

基于VB的两路数据实时采集

本文介绍压力和位移两路数据的实时采集、曲线的绘制、显示和存储。利用VB编程实现测控软件。该软件具有实现数据的接收、实时曲线绘制、显示和用数据库实现数据存储等功能。实时数据的接收采用串口通信,用VB提供的MSComm通信控件编写串口的通信程序,实现PC与单片机的数据交换;实时曲线的绘制采用两点定一直线的方法,用VB基本的绘图方法line方法来绘制;数据的显示和存储用VB的ActiveX数据对象MSHFlexGrid控件实现数据表格对实时测量数据的显示和AIX）控件对数据库的管理。     

在VB中使用Winsock控件实现局域网通信

介绍在VB环境下如何使用Winsoek控件实现局域网通信。程序员无须了解TCP或低级Winsoek APIs调用实现的细节，只需通过设置控件的属性并调用其方法就可轻易连接到一台远程计算机中，并且实现双向交换数据。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.