这是一本解说物联网的书。物联网整体服务的开发需要灵活应用传
感器和各类设备，本书就是为那些准备从事这种开发的硬件和软件工程
师编写的
This is a book about the Internet of things. The development of the Internet of things services needs flexible application and transmission
Sensors and devices, this book is for hardware and software engineering that is ready to do this development
By the teacher (2021-03-14, Others, 17252KB, 下载0次)
随着无线通信技术的发展，基于此技术的各种应用得到
迅速发展。在无线局域网（WLAN）、射频标签（RFID）、无线
传感器网络(WSN)等应用中，天线作为无线电设备中发射和接
收无线电波的装置，将在很大程度上影响整个系统的性能。
这些应用也对天线的小型化，全向性，多极化提出来较高的
要求。微带天线以其体积小，重量轻，便于集成等优点，在
无线通信应用中得到了的大量的应用与改进。本文就应用于
特高频（UHF）频段的印刷天线进行了小型化的设计改进，在
HFSS 中设计并仿真了一个工作在 2.4GHz 频点的印刷曲折型
天线。 随着无线通信技术的发展，基于此技术的各种应用得到
迅速发展。在无线局域网（WLAN）、射频标签（RFID）、无线
传感器网络(WSN)等应用中，天线作为无线电设备中发射和接
收无线电波的装置，将在很大程度上影响整个系统的性能。
这些应用也对天线的小型化，全向性，多极化提出来较高的
要求。微带天线以其体积小，重量轻，便于集成等优点，在
无线通信应用中得到了的大量的应用与改进。本文就应用于
特高频（UHF）频段的印刷天线进行了小型化的设计改进，在
HFSS 中设计并仿真了一个工作在 2.4GHz 频点的印刷曲折型
天线。
With the development of wireless communication technology, based on the technology of various applicationRapid development. In a wireless local area network ( WLAN ), ( RFID ), wireless radio frequency label (2013-01-10, C/C++, 851KB, 下载13次)
基于HFSS的UHF频段印刷天线的设计,随着无线通信技术的发展，基于此技术的各种应用得到
迅速发展。在无线局域网（WLAN）、射频标签（RFID）、无线
传感器网络(WSN)等应用中，天线作为无线电设备中发射和接
收无线电波的装置，将在很大程度上影响整个系统的性能。
这些应用也对天线的小型化，全向性，多极化提出来较高的
要求。微带天线以其体积小，重量轻，便于集成等优点，在
无线通信应用中得到了的大量的应用与改进。本文就应用于
特高频（UHF）频段的印刷天线进行了小型化的设计改进，在
HFSS 中设计并仿真了一个工作在 2.4GHz 频点的印刷曲折型
天线。
Based on the HFSS UHF band printed antenna design (2013-01-10, C/C++, 851KB, 下载39次)
中文摘要
正交频分复用（ OFDM ， Orthogonal Frequency Division
Multiplexing）是当前一种非常热门的通信技术。它即可以被看作是一种
调制技术，也可以被看作是一种复用技术。由于它具有抗多径衰落和频谱
利用率高的特点，因此被广泛应用于高速数字通信领域，比如应用于IEEE
802.11a无线局域网（WLAN）的物理层等等。
我的毕业设计的核心任务是：采用 FPGA 来实现一个基于OFDM 技术
的通信系统中的基带数据处理部分，即调制解调器。其中发射部分的调制
器包括：信道编码（Reed-Solomon 编码），交织，星座映射，FFT和插
入循环前缀等模块。我另外制作了相应的解调器，可以实现上述功能的逆
变换。
另外，我还对OFDM技术， IEEE 802.11a的标准文献，基于Simulink
的 OFDM 模型和仿真，ALTERA 公司的技术和 IP Core 的使用等方面进
行了研究。这些在文章中都有体现。
Abstract
Orthogonal frequency division multiplexing (OFDM, Orthogonal the Frequency Division,
Multiplexing) is a very popular communication technology. It can be seen as a
Modulation technique can also be seen as a multiplexing technique. Because of its resistance to multipath fading and spectrum
High utilization characteristics, and is widely used in high-speed digital communications, such as used in IEEE
802.11a wireless LAN (WLAN) physical layer.
The core mission of my graduation project: FPGA to implement a technology based on OFDM
Communication systems in baseband data processing part, ie the modem. These emission part of the modulation
Includes: channel coding (Reed-Solomon coding), interleaving, constellation mapping, FFT and interpolation
Into the cyclic prefix modules. I also produced a corresponding demodulator can achieve the inverse of the above functions
Transformation.
In addition, OFDM technology, the IEEE 802.11a standard literature, based on Simulink
(2012-05-20, PDF, 1517KB, 下载65次)
同相牵引供电系统旨在实现电能质量的综合补偿。提出了一种基于同步坐标变换的电流检测方法，能实时准确地检测
出负载电流的基波正序有功分量、基波正序无功分量、基波负序分量以及谐波分量，为综合补偿提供了基础。电能质量的补
偿力度与设备容量之间存在非线性关系。提出补偿度的概念，并给出补偿度与电能质量参数的关系，通过给定电能质量期望
参数，实时调整负序、谐波以及无功补偿度，使得综合潮流控制器容量在各电能质量补偿参数之间得到实时优化配置，从而
实现同相供电系统容量优化满意补偿。理论推导和仿真结果验证了所提方法的正确性和可行性。
The cophase traction power supply system aims at achieving power quality comprehensive compensation．A current
detection method based on synchronous reference frame transformation is proposed．The method can decompose the load current
real-timely into fundamental positive-sequence active component，fundamental positive-sequence reactive component，fundamental
negative-sequence component and harmonic component，which lays a foundation for comprehensive compensation．There are
nonlinear relation between compensation strength of power quality and device capacity．The paper proposes the concept of
compensation degree and gives the relationship between compensation degree and power quality parameters．By giving expected
power quality parameters，it adjusts compensation ratios of negative，reactive and harmonics instantaneously，so that the IPFC
capacity can be allocated between power quality compensating parameters optimally and real-timely，thus achieving capacity optimal
satisfactory compensa (2012-03-01, PDF, 1485KB, 下载49次)
CCD是美国贝尔实验室于1969年发明的，与电脑晶片CMOS技术相似，也可作电脑记忆体及逻辑运作晶片。目前大多数数码相机采用的图像传感器都是CCD。
CCD invented by Bell Laboratories in the U.S. in 1969, similar to CMOS technology and computer chips, can be used for computer memory and logic operation of the chip. Most digital cameras use image sensors are CCD (2012-02-28, Others, 22KB, 下载2次)
DotProject是一个在1996年左右,由开源组织自发组织人员开发的一个开源的项目管理软件系统,基于Web,可以部署于局域网"广域网的办公环境中,客户端不需要安装任何软件,只要有IE,Firefox,Opera等浏览器即可,强大,小巧.被翻译为了大约40多种语言,应用于100多个国家,可见它的简单易用的程度.
dotProject is a volunteer supported Project Management application. There is no "company" behind this project, it is managed, maintained, developed and supported by a volunteer group and by the users themselves.
For more about the product, what it does, etc please follow the links to the doc site at the top of site.
The software is free to anyone who would like to download it. Day to day support is provided free by volunteers.
If you would like to see the system in operation- use the Demo link in the modules list to the left top of the site.
If you would like to download the package use the downloads link on the top right. Please be aware that the CVS snapshot is guaranteed to be UNSTABLE and should not be used on a production site or if you are not willing to have to do some work at the code level.
If you are looking for support, to ask a question or to check to see if issues have been raised by others- use the support link at the top right to access our support forums. (2011-12-28, PHP, 4800KB, 下载3次)
太阳黑子是人们最早发现也是人们最熟悉的一种太阳表面活动。因为太阳内部磁场发生变化，太阳黑子的数量并不是固定的，它会随着时间的变化而上下波动，每隔一定时间会达到一个最高点，这段时间就被称之为一个太阳黑子周期。太阳黑子的活动呈现周期性变化是由施瓦贝首次发现的。沃尔夫 (R.Wolfer)继而推算出11年的周期规律。实际上，太阳黑子的活动不仅呈11年的周期变化，还有海耳在研究太阳黑子磁场分布时发现的22年周期；格莱斯堡等人发现的80年周期以及蒙德极小期等。由于太阳黑子的活动规律极其复杂，时至今日科学家们仍在努力研究其内在的规律和特性。事实上，对太阳黑子活动规律的研究不仅具有理论意义，而且具有直接的应用需求。太阳黑子的活动呈现周期性变化的，沃尔夫(R.Wolfer)根据在过去的288 年(1700年~1987 年)间每年太阳黑子出现的数量和大小的观测数据推算出11 年的周期规律。我们利用Matlab强大的数据处理与仿真功能，对Wolfer数进行功率谱密度分析从而可以得到对太阳黑子活动周期的结论。
It is the first discovered sunspots is the most familiar kind of solar surface activity. Because the magnetic field inside the sun changes, the number of sunspots is not fixed, it changes over time fluctuations, the time intervals to reach a high point, this time it was called a sunspot cycle. Cyclical changes in sunspot activity first discovered by Schwabe. Wolf (R. Wolfer) and then calculate the 11-year cycle rule. In fact, sunspot activity was not only the 11-year cycle, as well as sea-ear magnetic field distribution in the study of sunspots and found a 22-year cycle Grameen Myers, who found 80-year cycle and the Maunder minimum, etc. . Because the law is extremely complex sunspot activity, scientists are still working today to study its internal rules and features. In fact, the laws of sunspot activity on the study not only of theoretical significance, but also has direct application requirements. Cyclical changes in sunspot activity, and Wolf (R. Wolfer) based in the past 288 yea (2011-11-21, matlab, 52KB, 下载17次)
为解决这些矛盾并使集成电路的发展速度迈上一个新的台阶，本文介绍了几种基于检查点和卷回操作技术的容错电路结构。这些结构通过在寄存器级设置硬件检查点，可以从瞬态故障中执行卷回操作从而快速恢复。
To resolve these conflicts and make the level of integrated circuits improve more dramatically, this paper introduces several kinds of new structure of fault-tolerant circuits based on checkpointing and roll-back. The presented structure set hardware checkpoint at the register level and can recover from transient fault quickly. (2011-11-17, C++, 1KB, 下载5次)
随着汽车越来越向智能化和人性化发展,PKE 系统将会成为汽车门禁系统的主流。本文介绍了一种新的汽车智能无匙
门控系统设计方案,给出具体的软、硬件设计,并对设计中的关键技术进行详细的描述。该系统功耗低、收发距离远、可靠性及安
全性高,具有很好的应用前景。
关键词: 被动无匙门控 智能应答器 KEEL OQ 滚码编码 声表面波谐振器
With the car more to the development of intelligent and humane, PKE system will become the mainstream vehicle access control system. This paper introduces a new smart car keyless door control system design, give a specific software and hardware design, and design of the key technologies described in detail. The system is low power consumption, send and receive distance, reliability and safe, with good prospects. Key words: passive keyless door control intelligent transponder KEEL OQ roll coding SAW resonator (2011-10-15, Visual C++, 318KB, 下载40次)
光伏电池阵列输出功率受光照强度和温度变化的影响，因此最大功率点跟踪（MPPT）技术广泛应用于光伏系统中。在所有最大功率点(MPP)控制策略中，扰动观察（P&O）MPPT算法因易实现被广泛应用，然而它的缺点是在稳定工作状态下工作点通过MPP 时会导致能量振荡损耗，并且在光照强度或温度发生突变时表现较差的动态响应。在本文中，提出一种改进型变步长扰动观察MPPT 算法，此方法依据工作点动态调整步长变化，与传统固定步长方法比较，本文提出的方法能有效地提高MPPT 速度和转换效率，通过仿真和实验结果分析，验证了此改进算法的可行性。
PV array output power by the light intensity and temperature changes, the maximum power point tracking (MPPT) technology is widely used in photovoltaic systems. In all the maximum power point (MPP) control strategy, the disturbances observed (P & O) MPPT algorithm due to easy implementation is widely used, but its drawback is that the steady-state operating point by MPP will lead to energy oscillations loss, and in the light intensity or temperature when the poor performance of a mutation in the dynamic response. In this paper, propose a modified variable step disturbance observed MPPT algorithm, this method dynamically adjusted according to operating point step change, with the more traditional fixed-step method, the proposed method can effectively improve the MPPT speed and efficiency, The simulation and experimental results verify the feasibility of this improved algorithm. (2011-10-11, matlab, 504KB, 下载506次)
认知无线电是一种用于提高无线电通信频谱利用率的新的智能技术。 文章简述
了认知无线电的背景和概念，针对认知无线电的频谱感知能力，详细对比分析了四种频 谱检测技术：匹配滤波器法、能量检测法、循环平稳特性检测法和基于干扰的检测法，在 此基础上分析了当前频谱检测技术所面临的挑战。 最后探讨了干扰温度模型，并展望了 频谱检测技术的发展前景
cognitive radio networks (2011-09-17, TEXT, 7KB, 下载36次)
随着音频解码技术、存储器技术、mp3 高质量压缩技术等相关技术不断的发展以及人们
对消费电子产品需求的增加,MP3 新产品层出不穷,成为时尚潮流前沿的一个最佳载体。人们
可以用它休闲娱乐 ,也可以用它工作和学习。
With the audio decoding technology, memory technology, mp3 and other related high-quality compression technology continues to develop and people' s increasing demand for consumer electronics, MP3 new products are becoming one of the best cutting-edge fashion carrier. People can use it to entertainment, you can also use it to work and study. (2011-08-21, Unix_Linux, 56241KB, 下载4次)
为满足经济发展的需要，根据有关单位的决定修建1座110KV盐北变电所。
本工程初步设计内容包含变电所电气设计，新建的盐北变电所从110KV侧东郊变电所受电，其负荷分为35KV和10KV两个电压等级。
通过技术和经济比较，现采用下列方案：
1. 内设两台三绕组变压器，电压等级为121/37.8/11。
2. 110KV进线采用内桥接线形式。
3. 本工程初步设计内容包括变电所电气设计。
4. 35KV和10KV配电装置同样采用单母线分段接线。
5. 所用电分别从10KV两端母线获得。
For satisfying the demand that economy development, the authorities concerned decide to construct a YanBei transformer substation.
This engineering first step design contents includes the transformer substation of electric Design. The new-et up salt a YanBei transformer substation obtain power form Dong Jiao substation (110KV) . There are two kinds of local loads in the substation,. One is 35KV,the other is 10KV.
Pass the technique to compare with the economy, adopt the following scheme now:
1. There are two three-winding transformers in the substation. Voltage grade adopt 121KV 38.5KV and 11KV.
2. For 110KV main electrical connections shall adopt inside bridge connection.
3. The 110KVenters the line 2 return, The adoption builds trolley wire.
4. For 35KV and 10KV main electrical connections employ single sectionalized bus.
5. Auxiliary power system get power form the 10KV sectionalized bus.
(2011-04-15, Visual C++, 254KB, 下载34次)
利用四缸火花点火发动机模型，实践基于dSPACE 实时仿真系统的具体实验方法，
判断控制器模型的优劣。其中包括基于MATLAB/Simulink 的闭环离线仿真实验, 创建ControlDesk 试验界面，完成应用程序的编译、连接，代码的生成及下载，调整PI 参数进行实时仿真实验。
The use of four-cylinder spark ignition engine model, and practice the system based on dSPACE real-time simulation of specific experimental methods to determine the merits of the controller model. Including those based on MATLAB/Simulink simulation of the closed-loop off-line, create ControlDesk test interface, complete the application to compile, link, code generation and download, adjust the PI parameters in real-time simulation experiments. (2010-01-10, PDF, 285KB, 下载187次)
虚拟化安全综述——虚拟化是数据中心的流行技术,它起源于20世纪60年代。它是把昂贵的计算机资源的利用最大化的方式。典型的服务器运行至少40 利用率，虚拟化可以更有效地利用技术资源，并节约固定费用。虚拟化的最大优势是，它允许管理员从中央区域为个人电脑和客户设备提供软件。虚拟化不需要管理员对一般任务进行分别考虑。服务器的关机可以带动多用户的关机。
Virtualization Security Review- virtualization is a popular data center technology, which originated in the 20th century, 60 years. It is to expensive computer resources to maximize the utilization of way. The typical server is running at least 40 utilization, virtualization can be more effective use of technology resources, and save fixed costs. The biggest advantage of virtualization is that it allows administrators from the central region for personal computers and client devices software. Virtualization does not require the administrator of the general tasks considered separately. Server shutdown can foster the multi-user shutdown. (2009-12-20, Windows_Unix, 349KB, 下载10次)
在罗克韦尔运动控制台上，通过连接在控制网上两台ControlLogix控制器，使用罗克韦尔软件，进行控制网配置、逻辑编程和人机界面组态，实现对装配流水线上生产过程的控制及监视。
On the Rockwell motion console, with 2 ControlLogix controllers connected on ControlNet network, and using Rockwell software to configure network, program ladder diagram and configure HIM, control and monitor of assembly line are realized. (2009-09-11, WORD, 5KB, 下载2次)
中科院自动化所博士论文。本论文是与实际的应用项目紧密相关的。在课题进行期间，笔者负责了S60和S80两款注塑机控制器主机软、硬件的设计开发工作，并组织了批量生产。截止到目前为止，共销售注塑机控制器上百套，安装在了以宁波市为中心的多个地区的十多个厂家中。其中最早的原理样机已经在工业现场不间断运行了3年之久，历经了高、低温和潮湿环境的考验，充分证明了产品的可靠性。
Institute of Automation Chinese Academy of Sciences doctoral dissertation. This paper is a practical application of the project closely related. In the subject during the writer is responsible for the S60 and S80 of two injection molding machine controller, mainframe hardware and software design and development work, and organized mass production. To date, a total of hundred of sales of injection molding machine controller, installed in the center of Ningbo city, a number of areas in more than 10 manufacturers. The first prototype of which has been running non-stop in the industrial scene three years, after a high temperature and humid environment, the test has fully proved the reliability of the product. (2009-09-09, Visual C++, 3180KB, 下载37次)
数学形态学的数学基础和所用语言是集合论，因此它具有完备的数学基础，这为形态学用于图像分析和处理、形态滤波器的特性分析和系统设计奠定了坚实的基础。数学形态学的应用可以简化图像数据，保持它们基本的形状特性，并除去不相干的结构。数学形态学的算法具有天然的并行实现的结构， 实现了形态学分析和处理算法的并行，大大提高了图像分析和处理的速度。
The mathematical basis of mathematical morphology and the language is set theory, so it has a complete mathematical basis for the morphology for image analysis and processing, morphological analysis of the characteristics of filter and system design has laid a solid foundation. Application of mathematical morphology can be simplified image data, and maintain their basic shape characteristics, and to remove extraneous structures. Morphology of the parallel algorithm has a natural realization of the structure, the realization of a morphological analysis and parallel processing algorithms, which greatly raised the image analysis and processing speed. (2009-05-19, matlab, 41KB, 下载31次)
介绍了工业以太网技术的新进展： 工业以太环网冗余技术( 环冗余、 双环冗余和变换式工业以太网) 、 实时以太网协议( Ethernet Powerlink和 Beckhoff EtherCA T ) 、 新型工业以太网连接器、 以太网共缆供电规范、 嵌入式Internet硬件芯片协议及其在现场仪表中的应用。
Introduction of Industrial Ethernet Technology: Industrial Ethernet Ring Redundancy Technology (ring redundancy, redundancy and transform bicyclol Industrial Ethernet), real-time Ethernet protocol (Ethernet Powerlink and Beckhoff EtherCA T) , the new Industrial Ethernet connector, Ethernet Cable Power Supply norms, embedded Internet protocol hardware chip and its application in field instrument applications. (2008-04-10, PDF, 244KB, 下载172次)