英语原文共 719 页， 第一章 结果： 在本章结束后你所应该掌握如下内容： bull;可以解释术语“软件”、“程序”、“源代码”、“程序代码”的含义； bull;可以区分应用软件和系统软件的区别； bull;解释JAVA程序是如何编译和运行的； bull;可以提供不同类型的JAVA应用程序的示例； bull;编写可以在屏幕上展现文本内容的JAVA程序； bull;通过使用 连接符来输出命令消息； bull;添加程序注释 介绍 就像任何一个刚开始学习程序模块的学生一样，你会渴望做一件事-开始你的第一个程序。我们可以很好的理解，你也绝对不会失望，因为你即将写下第一个程序在这第一个章节。对于设计和编写电脑程序最重要的是你可以享受并满意你所做的事情，尽管这看起来有一点令人畏惧，因为这是你之前从�

英语原文共 13 页， 基于紫外吸收的微型个人臭氧检测仪 Peter C. Andersen, Craig J. Williford, and John W. Birks* 2B Technologies, Inc., 2100 Central Ave., Suite 105, Boulder, Colorado 80301 摘要：研制了一种新型便携个人检测仪器，可对ppb量级的臭氧进行快速检测。这种个人臭氧检测仪基于环境保护局（EPA）联邦认证的紫外吸收法，具有体积小（10times;7.6times;3.8cm）、重量轻（0.3kg）、低功率（2.9W）以及电池供电等优点。该仪器可以在日常活动中随身携带，因为其不会受湿度、物理方位、温度和振动的影响。为了消除水蒸气的显著干扰，在探测单元前安装了Nafion软管，并在光路中放置了石英。仪器每10秒进行一次测量，证明精度为1.5ppbv，检测限为4.5ppbv（S/N=3）。 介绍 作为一种污染物，臭氧的主要危害是其对于人体健康的影响。由于其具有强氧化性�

MATLAB is a high-level language and interactive environment that enables you to perform computationally intensive tasks faster than with traditional programming languages such as C, C , and Fortran. You can use MATLAB in a wide range of applications, including signal and image processing, communications, control design, test and measurement, financial modeling and analysis, and computational biology. Add-on toolboxes (collections of special-purpose MATLAB functions, available separately) extend the MATLAB environment to solve particular classes of problems in these application areas. MATLAB provides a number of features for documenting and sharing your work. You can integrate your MATLAB code with other languages and applications, and distribute your MATLAB algorithms and applications. MATLAB has key featuers as follows:(1)High-level language for technical computing (2)Development environment for managing code, files, and data(3)Interactive tools for iterative exploration, desi

外文文献 The SCM and micro;Vision2 一、Principle of MCU Single-chip is an integrated on a single chip a complete computer system. Even though most of his features in a small chip, but it has a need to complete the majority of computer components: CPU, memory, internal and external bus system, most will have the Core. At the same time, such as integrated communication interfaces, timers, real-time clock and other peripheral equipment. And now the most powerful single-chip microcomputer system can even voice, image, networking, input and output complex system integration on a single chip. Also known as single-chip MCU (Microcontroller), because it was first used in the field of industrial control. Only by the single-chip CPU chip developed from the dedicated processor. The design concept is the first by a large number of peripherals and CPU in a single chip, the computer system so that smaller, more easily integrated into the complex and demanding on the volume c

The adaptive fuzzy PID control study of active vibration isolation system Abstract - With the development of space technology, the adverse effects to the spacecraft payload caused by the inevitable vibration from electromechanical system become increasingly prominent. To effectively reduce low frequency vibration, this paper presents a design scheme which takes voice coil motor servo system as active actuator of vibration isolation platform, and for the actual vibration isolation system, it is not possible to establish a precise mathematical model, so the combination of adaptive fuzzy control and PID control are applied to the active vibration isolation system based on voice coil motor. Simulation results show that the self- adaptive fuzzy PID control system has a good stability and anti-jamming capabilities, could isolate external vibration interference in a very wide frequency range, provides new and reasonable control ideas for the complex conditions and high index of control

CNC numerical control machine tools Computer digital control is a cover all kinds, with different size, shape and function of the machine#39;s term ，But the most simple methods of understanding is CNC is a kind of controlled by computer in the cube material processing out useful objects machine. CNC machine can be divided into two categories: the nc lathe and nc milling machine. Numerical control lathe usually consists of clamping workpiece high-speed rotating device and a can cut to workpiece excess material tool composition (tool can be in workpiece up to and from sports, until get the desired shape of the). Nc milling machine is a kind of can in the X, Y, Z axis three directions of milling processing device. the nc lathe and nc milling machine does not necessarily need computer to produce a queue to control. Numerical control technology and computer technologies can allow people to first of all on the computer design products, and then define how nc machine tool pro

An Intelligent Card Entrance Guard System Based on Fingerprint Fingerprint minutiae refers by comparing different fingerprints for many disciplines fingerprint identification technology involves image processing, pattern recognition, computer vision, mathematical morphology, wavelet analysis. Since each persons fingerprint, is between the fingers of the same person, there was a marked difference between a fingerprint, so fingerprints can be used for identification. Because each stamped orientation is not exactly the same, it will bring a different focus in different degrees of deformation, and there are a lot of fuzzy fingerprint, how to extract features correctly and achieve the correct match is the key fingerprint recognition technology. Fingerprint, the English name for the fingerprint, two fingerprints will often have the same general features, but their minutiae, but they can not be identical. Fingerprint is not continuous, smooth straight, but often interrupted, fork or tu

Study of Stepping Motor Subdivision Driver Stepper motor is a kind of electrical pulses into angular displacement of the implementing agency. Popular little lesson: When the driver receives a step pulse signal, it will drive a stepper motor to set the direction of rotation at a fixed angle (and the step angle). You can control the number of pulses to control the angular displacement, so as to achieve accurate positioning purposes; the same time you can control the pulse frequency to control the motor rotation speed and acceleration, to achieve speed control purposes. What kinds of stepper motor sub-： In three stepper motors: permanent magnet (PM), reactive (VR) and hybrid (HB) permanent magnet stepper usually two-phase, torque, and smaller, step angle of 7.5 degrees or the general 15 degrees; reaction step is generally three-phase, can achieve high torque output, step angle of 1.5 degrees is generally, but the noise and vibration are large. 80 countries in Europe and