真假GP超霸 镍氢充电电池鉴别

随着数码相机、数码随身听等产品的普及，成本较低而又耐用的镍氢充电电池(以下简称镍氢电池)越来越受到消费者的关注。而GP超霸出品的镍氢电池无疑是最受消费者欢迎的产品，普及率相信也是最高的。俗话说“树大招风”，GP超霸镍氢电池也就自然而然地成为了造假售假者的首选目标。本次就让我们来看看真假GP超霸镍氢电池如何鉴别吧。     

一款通用型镍氢充电器的设计与制作

随着镍氢电池供电的电子产品日益增多，使用针对不同容量镍氢电池的通用型充电器将能提供很大方便。这里介绍一款充电器，是笔者多年以来的设计实验成果，它可以对200—3000mAh不同容量的镍氢电池进行充电，而且充电效率高，充电效果非常好。     

漫谈数码相机电池选购

当你开启数码相机,打开LCD构图时,当你在一个美丽的风景区使用数码相机留影时……突然,数码相机的LCD显示屏出现了一个红色的警告标志——电池没电;或者当你在使用数码相机过程中,突然从电池仓中冒出浓浓的焦味;更加让人痛心的是由于使用假冒电池而使让爱机终身“瘫痪”。由此可见,数码相机电池的选购相当重要。下面介绍数码相机电池的相关知识,供你选购和使用时参考。1.镍氢电池镍氢电池是早期镍镉电池的替代产品,相对于镍镉电池来说,镍氢电池具有以下优势:它极大减少了镍镉电池存在的“记忆效应”,使镍氢电池的使用更方便,循环使用寿命更长。此外,镍氢电池还具有容量高、放电深度大、耐过充和过度放电、充电时间短等优点。最重要的是镍氢电池不再     

基于C8051F的镍氢电池组管理系统设计和实现

对镍氢电池充放电原理和特性的分析,并根据镍氢电池充放电管理需求,提出了一种基于C8051F单片机对多节镍氢电池串联电池组进行综合监测和管理的方案,通过设计：实现了新型电池管理电路,包括完整的硬件和软件解决方案。试验结果表明,该电路运行稳定、抗干扰能力强、可靠性高。     

镍氢电池组电压均衡与管理系统的研究

针对镍氢电池组在矿用不间断直流稳压电源中应用时需要进行电压均衡和状态监控管理的问题,设计了一种以MSP430单片机和LTC6803-1电池管理芯片为核心的镍氢电池组电压均衡与管理系统,实现了对20节串联镍氢电池组的电压均衡和单体电压、电流、温度的监控管理。     

基于DS2712的USB接口镍氢电池充电器设计

随着USB接口的广泛应用,将其作为小功率消费类电子产品的电池充电电源十分便利,而新产品的不断涌现和USB接口标准的不断进步使电池充电器设计面临着新的机遇与挑战。在此回顾了USB接口和镍氢电池的特性,对比了基于线性稳压源和开关电源原理设计的充电器之间的差异,设计了一种以DS2712为充电控制器,使用USB接口作为电源的镍氢电池充电器。在此设计的USB接口镍氢电池充电器经硬件验证,实现了对一节镍氢电池的快速智能充电功能,充电过程稳定可靠。     

镍氢电池的原理及与镍镉电池的比较

本文详细介绍了镍氢电池的基本工作原理、结构和特性，还从多个方面对镍与镍镉电池进行了比较。     

镍镉／镍氢电池伺服充电控制器UCC3905应用

本文详细介绍了镍镉／镍氢电池伺服充电控制器ＵＣＣ３９０５的主要特点和内部结构，还简要介绍了实际应用电路，与其他充电控制器相比，该控制器能够保证电池真正充足电。     

DS2711／DS2712镍氢电池充电器

锂离子电池是目前比较理想的可充电电池，但并不意味着它可以淘汰其它化学电池。像镍镉（Nicd）和镍氢（NiMH）电池，因其坚固，能承受较高的放电速率，具有较长的使用寿命，不需要特殊的保护电路，并且价格便宜，故在可充电电源系统中仍拥有自己的优势。由于镍镉电池容量低，含有有毒的镉元素，正在被镍氢电池所取代。镍氢电池及其充电器仍有较大的市场需求。     

基于MAX2003A的镍镉电池快速充电器

首先介绍镍镉／镍氢电池快速充电控制器MAX2003A的原理及功能，然后，以一个实例说明用MAX2003A制作镍镉电池快速充电器的设计步骤，给出了具体的硬件电路。     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

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.     

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.