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Description: 功能巨全界面漂亮的带宽使用量监视器，bv实现，可编译运行。-function Ju-beautiful interface bandwidth usage monitor, bv, which could be compiled operation.
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Size: 131525 |
Author: 刘机 |
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Description: 以SPCE061A单片机（ Single Chip Micyoco）为核心，通过DDS合成技术设计制作了一个步进值能任意调节的多功能信号源。该信号源在1KHz～10MHz范围能输出稳定可调的正弦波，并具有AM、FM、ASK和PSK等调制功能。信号输出部分采用低损耗电流反馈型宽带运放作电压放大，很好地解决了带宽和带负载能力的要求。系统带中文显示和键盘控制功能，操作简便，实现效果良好。
内含 原程序，正弦信号发生器的pCB原理图，以及一些相关论文。-to SPCE061A (Single Chip Micyoco) at the core, DDS technology through the design of an arbitrary value of Step-conditioned multi-purpose signal source. The signal source in a KHz - 10MHz range stability can be adjustable output sine wave, with AM, FM, ASK and other PSK modulation functions. Part of the output signals using low loss current-feedback operational amplifier for wideband voltage amplification and very good solution with the bandwidth and load capacity requirements. Chinese system with display and keyboard control functions, simple operation, achieving good results. Intron original program, sinusoidal signal generator pCB diagram, and a number of related papers.
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Size: 520337 |
Author: 陈朋 |
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Description: DDS在现在运用月来越广泛，在相对带宽、频率转换时间、相位连续性、正交输出、高分辨力以及集成化等方面都远远超过了传统频率合成技术所能达到的水平，为系统提供了优于模拟信号源的性能。利用DDS技术可以很方便地实现多种信号。在FPGA上实现的DDS-DDS now to the use of more extensive relative bandwidth, frequency conversion time, phase continuity, quadrature output, high-resolution and integration, and other aspects far more than the traditional frequency synthesizer technology can achieve the level To provide a superior analog signal source performance. DDS technology can be used very easily to a variety of signal. FPGA Implementation of DDS
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Size: 180081 |
Author: 孙洪亮 |
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Description: 零耗时低频宽脉冲软PWM信号控制C51演示程序-zero time-consuming low-bandwidth pulses soft PWM control signal C51 Demonstration Program
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Size: 5439 |
Author: gw |
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Description: 我们大部分人都有深刻体验，每当主流浏览器版本的升级，我们刚建立的网站就可能变得过时，我们就需要升级或者重新建造一遍网站。例如1996-1999年典型的\"浏览器大战\"，为了兼容Netscape和IE，网站不得不为这两种浏览器写不同的代码。同样的，每当新的网络技术和交互设备的出现，我们也需要制作一个新版本来支持这种新技术或新设备，例如支持手机上网的WAP技术。类似的问题举不胜举：网站代码臃肿、繁杂浪费了我们大量的带宽；针对某种浏览器的DHTML特效，屏蔽了部分潜在的客户；不易用的代码，残障人士无法浏览网站等等。这是一种恶性循环，是一种巨大的浪费。
如何解决这些问题呢？有识之士早已开始思考，需要建立一种普遍认同的标准来结束这种无序和混乱。商业公司(Netscape、Microsoft等)也终于认识到统一标准的好处，因此在W3C（W3C.org）的组织下，网站标准开始被建立（1998年2月10日发布XML1.0为标志），并在网站标准组织（webstandards.org）的督促下推广执行。-most of us have a profound experience, whenever the mainstream version of the browser upgrade We have just established on the site may become outdated, we need to upgrade or new construction site again. 1996 -1999, for example, a typical "browser wars", in order to compatible Netscape and IE, This website had to write two different browser code. Similarly, whenever a new network technology and the emergence of interactive equipment. We also need to produce a new edition had originally supported this new technology or new equipment, such as support for Internet phone WAP technology. Similar problems abound : Site code bloated, complicated we wasted a lot of bandwidth; Revenue browser DHTML effects, shielding some of the potential customers; The code is not easy, disabled people un
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Size: 2174227 |
Author: hui |
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Description:
该软件会在用户的使用过程中自动进行调整达到最佳状态，特别是对于使用bt等p2p软件的用户，基本不需要进行手工调较。下面是引自VeryCD的手工调较步骤
(1) 待测 ADSL 网络净空, 也就是没有任何计算机使用到频宽
(2) 确定打开 信息通信量调整 功能.
(3) 右键任务栏 cFos/cFosSpeed 执行 (删除关于线路的数据)
(4) 纯粹全速下载!! 最好的方法就是找个大档案下载 (千万别用 P2P, 因为会动到大量上传), 这样的过程建议超过 30 秒. 然后停止下载.
(5) 纯粹全速上传!! 最好方式, 就是发一封 eMail, 夹个大档案 (建议超过 5MB) 给自己, 但也不用真的把这封信传完, 只要能保持全速上传约 60 秒就可以了.
-the software users in the process of using automatic adjustments to achieve the best condition, particularly for the use of such bt p2p software users do not need basic manual adjustments. Below is a quote from VeryCD manual adjustment steps (1) the unknown ADSL network headroom. is no use of computer bandwidth (2) identify information and communication open adjust function. (3) right-click the task bar cFos / cFosSpeed implementation (to remove the lines of data) ( 4) simply download full swing! ! The best way is to find a download large files (Do not use P2P. because it will move a large number of uploading), Such a process recommended more than 30 seconds. then stop downloading. (5) exclusively at full speed uploads! ! the best way eMail is a fat folder large files (over 5MB recommended
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Size: 9104 |
Author: 王夏林王夏林 |
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Description: LibTorrent is a BitTorrent library written in C++ for *nix, with a focus on high performance and good code. The library differentiates itself from other implementations by transfering directly from file pages to the network stack. On high-bandwidth connections it is able to seed at 3 times the speed of the official client.
The client uses ncurses and is ideal for use with screen or dtach. It supports saving of sessions and allows the user to add and remove torrents.
-LibTorrent is a BitTorrent library writte n in C for * nix. with a focus on high performance and good code. T he library differentiates itself from other im plementations by transferring directly from fi le pages to the network stack. On high-bandwidt h connections it is able to seed at three times the spe ed of the official client. The client uses ncurs es and is ideal for use with screen or dtach. It su pports saving of sessions and allows the user to add and remove torrents.
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Size: 485174 |
Author: Kimi Chen |
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Description: 线性调频信号在宽脉冲内附加线性调频以扩展信号频带，提供了时宽带宽积大于1的信号，有效地解决了大的时宽和带宽不可兼得的矛盾。-LFM pulse width within the additional chirp signal bandwidth expansion, Broadband provides a wide plot when more than one signal, effectively solve the big time and wide bandwidth closest of the contradictions.
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Size: 205315 |
Author: liujl |
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Description: 术是继直接频率合成和间接频率合成之后，随着数字集成电路和微电子技术的发展而迅速发展起来的第三代频率合成技术。DDS技术具有相对带宽宽、频-operation is the direct and indirect frequency synthesizer frequency synthesis, With digital integrated circuits and microelectronic technology development and the rapid development of the third generation of frequency synthesis technology. DDS technology is relatively wide bandwidth, frequency
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Size: 1055 |
Author: aabbcc |
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Description: 术是继直接频率合成和间接频率合成之后，随着数字集成电路和微电子技术的发展而迅速发展起来的第三代频率合成技术。DDS技术具有相对带宽宽、频-operation is the direct and indirect frequency synthesizer frequency synthesis, With digital integrated circuits and microelectronic technology development and the rapid development of the third generation of frequency synthesis technology. DDS technology is relatively wide bandwidth, frequency
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Size: 1438 |
Author: aabbcc |
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Description: Zebedee is a simple program to establish an encrypted, compressed
\"tunnel\" for TCP/IP or UDP traffic between two systems. This
allows data from, for example, telnet, ftp and X sessions to be
protected from snooping. You can also use compression, either
with or without data encryption, to gain performance over
low-bandwidth networks.
-Zebedee is a simple program to establish an encrypted, compressed "tunnel" for TCP / IP or UDP traffic b etween two systems. This allows data from, for example, telnet, ftp and X sessions to be protected from snooping . You can also use compression, either with or without data encryption. to gain performance over low-bandwidth networ ks.
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Size: 165130 |
Author: robo |
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Description: 本作品是基于Windows平台使用Visual C++工具开发的多文档应用程序。本课题组成员在对DICOM3.0医学影像存储与传输的国际标准和JPEG 2000静态图像压缩标准学习的基础上，实现了基于JPEG 2000标准的医学图像高效压缩功能，压缩比可在1～300间可调；同时该软件兼容JPEG压缩，压缩比可在1～100间可调。该软件操作简单、界面友好，是PACS系统的一个重要组成部分，对于缓解传输带宽和存储容量的压力具有一定意义。-of the book is based on the Windows platform using Visual C development tool for the multi-document applications. The members of the task group on DICOM3.0 medical imaging storage and transmission of international standards and JPEG 2000 Static state image compression standard on the basis of studies, Based on the realization of the JPEG 2000 standard medical image compression function efficiently, compression ratio can be an adjustable-300; The software also compatible JPEG compression, compression ratio in a ~ 100 adjustable. The software is simple, friendly interface and PACS system is an important component of the For ease transmission bandwidth and storage capacity of the pressure with a certain sense.
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Size: 920972 |
Author: 袁耀辉 |
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Description: 当前流行的AJAX实例电子书.AJAX 让网络带宽不再成为问题，让网站速度不再成为问题.
-current popular AJAX examples of e-books. AJAX for network bandwidth ceased to be a problem, website speed no longer be a problem.
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Size: 2582878 |
Author: 阿飞 |
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Description: IA4420 工作在315/433/868/915MHz 频段（IA4421 工作在433/868/915MHz 频段）；
2． 低电压工作，工作电压2.2V~5.4V；
3． 低功耗模式，待机电流0.3uA；
4． 调制模式FSK，并具备高度集成的PLL；
5． 低发射功率、高接收灵敏度设计，发射功率5~10 dbm 可调，接收灵敏度-109 dbm；
6． 内置时钟输出，可省掉MCU 的晶振；
7． 传输数据率高，数字信号可达115.2 kbit/s,模拟信号可达256 kbit/s；
8． 发射频偏与接收带宽可调；
9． 内部有数字滤波器，并可以根据要求选择不同的方式；
10． SPI 的控制接口，方便使用；
11． 接收时有数据同步码识别器，系统检测同步码后将后面的数据输出；
12． 有16 位的收发缓存器，用来缓存接收到或要发送的数据（接收数据有两种方式，用户可以按需选择）；
13． 有低电压检测器，从2.2-5.4V 可调；
14． 有定时唤醒功能，定时时间可达几天；
15． 天线的兼容性强，有天线自动调节功能，并可采用PCB 或外置天线；
16． 工作温度范围-40~85，储存温度范围-55~125℃；
17． 采用微小TSSOP16 封装。
-315/433/868/915MHz IA4420 work in the band (IA4421 Working in 433 / 868/915MHz band); 2. Low-voltage, voltage 2.2 V ~ 5.4V; 3. Low-power mode, standby current 0.3 uA 169 * 85 *; 4. FSK modulation mode, and highly integrated PLL; 5. Low emission power and high receiver sensitivity, launched power 5 ~ 10 dbm adjustable, -109 dbm receiver sensitivity; 6. Built-in clock output can be saved MCU resonator; 7. Higher data transmission rate, digital signal of up to 115.2 kbit / s, analog signal up to 256 kbit / s; 8. Emission Offset and receiving adjustable bandwidth; 9. Internal digital filters, and may request to have a choice of different ways; 10. SPI control interface, and ease of use; 11. When receiving data synchronization code identifier, the system will detect synchronous code behind the
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Size: 39433 |
Author: songxiaoyan2008 |
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Description: 在FPGA系统设计中，要达到性能最大化需要平衡具有混合性能效率的元器件，包括逻辑构造(fabric)、片上存储器、DSP和I/O带宽。在本文中，我将向你解释怎样能在追求更高系统级性能的过程中受益于Xilinx® 的Virtex™ -5 FPGA构建模块，特别是新的ExpressFabric™ 技术。以针对逻辑和算术功能的量化预期性能改进为例，我将探究ExpressFabric架构的主要功能。基于实际客户设计的基准将说明Virtex-5ExpressFabric技术性能平均比前一代Virtex-4 FPGA要高30％。-in FPGA system design to achieve maximum performance with the need to balance the efficiency of the mixed performance components including logical structure (fabric), on-chip memory, DSP and I / O bandwidth. In this article, I will explain how you can in the pursuit of higher system-level performance of the process to benefit from Xilinx
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Size: 97520 |
Author: yaoming |
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Description: delphi下利用socket编成实现多播的例子，可以有效地节省网络带宽。-delphi using socket into achieving multicast example, can effectively save network bandwidth.
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Size: 161136 |
Author: 大海 |
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Description: 仿真锁相环系统，可以仿真锁定时间。不同的环路带宽对系统的非理想特性！-PLL simulation system that can lock simulation time. Different loop bandwidth of the system of non-ideal characteristics!
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Size: 367031 |
Author: 韩富强 |
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Description: 扩展频谱通信系统是指待传输信息的频谱用某个特定的扩频函数扩展后成为宽频带信号，送入信道中传输，再利用一定手段将其压缩，从而获取传输信息的通信系统。
在传输同样信息时所需的射频带宽，远比我们已熟知的各种调制方式要求的带宽要宽得多。扩频带宽至少是信息带宽的几十至 几万倍。-spread spectrum communication systems refer to the transmission of information with a particular spectrum of spreading function expansion into broadband signal into Channel Tunnel, and then use some of its means of compression, thus acquiring the transmission of information communication systems. In the same transmission of information necessary for RF bandwidth than we have been familiar with the various requirements of the modulation bandwidth to a much wider. Spreading information bandwidth is the bandwidth of at least a few dozen to several tens of thousands of times.
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Size: 216076 |
Author: 12313 |
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Description: 随着无线mesh网络的普及，其规模和复杂程度持续发展。然而多跳的mesh网络遇到越来越多的难题，比如带宽降低，无线干扰以及网络时延等。譬如，在网络中的每一跳吞吐量会下降多达50％，连续多跳情况下吞吐量下降得更迅速，其结果将导致网络性能的严重降低。在语音和视频应用大量运行的极端情况下，时延和RF干扰将达到不可接受的程度，而导致连接完全中断-wireless mesh network with the popularity of its size and complexity of sustainable development. However, multi-hop mesh networks encountered more and more problems, such as lower bandwidth, wireless interference and network delay, and so on. For example, in each of the network throughput would drop jump up to 50%, for a number of cases jumped more rapid decline in throughput, The results will lead to serious network performance lower. In voice and video applications running of a large number of extreme cases, delay and RF interference will reach an unacceptable level. which led to the link severed
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Size: 209493 |
Author: wolfguy |
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Description: 随着无线mesh网络的普及，其规模和复杂程度持续发展。然而多跳的mesh网络遇到越来越多的难题，比如带宽降低，无线干扰以及网络时延等。譬如，在网络中的每一跳吞吐量会下降多达50％，连续多跳情况下吞吐量下降得更迅速，其结果将导致网络性能的严重降低。在语音和视频应用大量运行的极端情况下，时延和RF干扰将达到不可接受的程度，而导致连接完全中断-wireless mesh network with the popularity of its size and complexity of sustainable development. However, multi-hop mesh networks encountered more and more problems, such as lower bandwidth, wireless interference and network delay, and so on. For example, in each of the network throughput would drop jump up to 50%, for a number of cases jumped more rapid decline in throughput, The results will lead to serious network performance lower. In voice and video applications running of a large number of extreme cases, delay and RF interference will reach an unacceptable level. which led to the link severed
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Size: 225996 |
Author: wolfguy |
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