SOPHO－S2500交换机市话直接拨入功能的实现

ＳＯＰＨＯ－Ｓ２５００交换机市话直接拨入功能的实现阎先连ＳＯＰＨＯ－Ｓ２５００数字程控用户交换机进入市话网，一般使用ＡＴＵ－ＳＳ０１市话模拟中继板，接入市话局的用户级，实现ＤＯＤ２＋ＢＩＤ的中继方式，由于这种方式需要由话务员来转接市话用户的呼入，因此...     

数字交换机与步进制交换机互连组网技术

数字交换机与步进制交换机互连组网技术清华大学舒劲松清华大学现有一台ＳＯＰＨＯ－Ｓ２５００数字程控用户交换机和一台４７式步进制交换机。ＳＯＰＨＯ－Ｓ机共２０００门，号码编排为４０００－５９９９，使用光纤作为数字中继线，采用ＤＩＤ＋ＤＯＤ１的入网方式，引...     

SOPHO交换机3次故障处理

营口港通信公司使用飞利浦公司生产的ＳＯＰＨＯ交换机，主要有Ｓ２５００、ＩＳ３０５０、ＩＳ３０９０三种型号。下面就ＳＯＰＨＯＩＳ３０５０交换机谈谈我们的维护经验。故障１执行ＯＭ维护命令时，不出现已被执行的信息，而出现字符和数字代码。例：显示无声告警：...     

SOPHO—S数字程控交换机在XX矿务局数字通讯专网的应用

ＳＯＰＨＯ－Ｓ系列数字程控交换机是荷兰飞利浦公司于八十年代末的一种全数字式面向话音，数据，文本和图像等多种综合业务通信的时分程控用户交换机，它具有容量范围大，组网能力强，接口方式多，号码灵活等特点，特别适用于各种专网，本文主要介绍ＳＯＰＨＯ－Ｓ交换机在ＸＸ矿务局的应用情况。     

利用数字程控用户交换机实现计算机联网

利用数字程控用户交换机实现计算机联网舒劲松综合业务程控用户交换网（ＩＳ─ＰＡＢＸ网）是清华大学校园网的重要组成部分，它以电路交换方式向用户提供话音及非话业务信息的通路，实现全校范围内的电话通信和数据通信。ＩＳ─ｐＡＢＸ网以ＳＯＰＨＯ─Ｓ２５００数字程...     

SOPHO—S的结构分析与线路传输技术

ＳＯＰＨＯ－Ｓ系列数字程控交换机是由飞利蒲公司生产的。本文分析了该系列交换机的总体结构，并了它的线路传输技术。     

UF—2EXC传真机故障检修三则

ＳＯＰＨＯＳＥＴ和ＬＡＭ的结构特点与功能○施荣华在ＳＯＰＨＯＳ数字程控交换机系列中，数字话机ＳＯＰＨＯＳＥＴ借助于它背后的插座可连接数据设备；数据终端适配器ＬＡＭ是一个双通道数据电话设备，也可以连接数据设备。ＳＯＰＨＯＳＥＴ用于现代化办公室通...     

手机前线

ＭＯＢＬＥ‘Ｓ　ＦＲＯＮＴＬＩＮＥ三星　ＳＣＨ－Ｘ２９０ ＳＣＨ－Ｘ２９０ 是韩国三星出品的一款ＶＯＤ视频点播手机，显示屏为４０９６色的ＳＴＮ－ＬＣＤ，支持４０和弦铃声，机身顶部的来电显示灯可报据不同的来电者设定５种颜色变化。这款手机规格为：８８．５ × ４６．５ × ２０．６／２２．８毫米（薄电／厚电），重量为８９／１０５．２克（薄电／厚电）。三星　ＳＰＨ－Ｘ４５００ ＳＰＨ－Ｘ４５００是一款外型独特的贝壳机，翻盖上镶有一块椭圆形装饰物，有点类似于女性的化装盒，估计女性消费者会喜欢这款手机。这款手机…     

SMS－2500T／R

ＳＭＳ－２５００Ｔ／ＲＳＭＳ－２５００Ｔ／Ｒ是ＳＭＳ系列中的一员。高速侧接口包括ＳＴＭ－１６（２４８８．３２Ｍｂｉｔ／ｓ）光信号接口。发送侧，ＳＭＳ－２５００Ｔ最多可复用１６个支路信号（１４０Ｍｂｉｔ／ｓ或ＳＴＭ－１电信号）并将ＳＴＭ－１６光信号发送...     

日本PHS—WLL技术在电信网中定位与发展探讨

从ＰＨＳ－ＷＬＬ的概念和系统结构的介绍入手，结合日本的发展现状，探讨ＰＨＳ－ＷＬＬ业务在我国电信网中发展的可能性和使用的最佳场所，也对ＰＨＳ－ＷＬＬ业务与目前我国蜂窝移动电话业务的关系进行了试定位。     

PLC在高炉矿焦槽系统中的应用

介绍了重钢2500m3高炉矿焦槽自动化控制系统，主要的控制功能。     

Noncooperative target classification using hierarchical modeling ofhigh-range resolution radar signatures

The classification of high-range resolution (HRR) radar signatures using multiscale features is considered. We present a hierarchical autoregressive moving average (ARMA) model for modeling HRR radar signals at multiple scales and use spectral features extracted from the model for classifying radar signatures. First, we show that the radar signal at a different scale obeys an ARMA process if it is an ARMA process at the observed scale. Then, an algorithm to estimate model parameters and power spectral density function at different scales using model parameters at the observed scale is presented. A feature set composed of spectral peaks is extracted from the estimated spectral density function using multiscale ARMA models. For HRR radar signature classification, multispectral features extracted from five different scales are used, and a minimum distance classifier with multiple prototypes is used to classify HRR data. The multiscale classifier is applied to two HRR radar data sets. Each data set contains 2500 test samples and 2500 training samples in five classes. For both data sets, about 95% of the radar returns are correctly classified     

Oscillator performance and energy extraction from a KrF laser pumped by a high-intensity relativistic electron beam

A laser cell with 21 of excitation volume was used to study the electron-beam pumped KrF laser system at excitation rates of 1.8- 7.0 MW/cm³. The system was optimized as an oscillator for various mixtures of Ar, Kr, and F2at total pressures of 1000 and 2500 torr. The resulting optimum conditions gave an intrinsic efficiency (laser energy out/electron-beam energy deposited) of 12 percent for the 1000 torr total pressure mixture with an output energy of 11 J/1. An efficiency of 10 percent with an output of 40 J/1 was obtained for the 2500 torr mixture. The system was then used as an amplifier to measure the extracted power as a function of input power for the two mixtures. The small-signal gain go, the nonsaturable absorption α, and the saturation intensity Iswere determined for the two mixtures. Analysis of the data gave g0= 16-18 percent/cm,alpha = 0.75-1.25percent/cm, and Is= 2 MW/cm²for the 1000 torr mixture and g0= 17-19 percent/cm,alpha = 1.0-1.5percent/cm, andI_{s} = 9MW/cm²for the 2500 torr mix.     

Dielectric properties of beef, beef liver, chicken and salmon at frequencies from 100 to 2500 MHz

The dielectric properties of uncooked beef, beef liver, chicken and salmon meat were measured at frequencies between 100 and 2500 MHz and at selected temperatures between 1.2 degrees C and 65 degrees C. Experimental method and the sample holder are briefly described. The results for the dielectric constant and the dielectric loss factor are presented as a function of frequency at selected temperatures and show a trend consistent with theoretical expectation.     

A beacon navigation method for autonomous vehicles

A method for navigating autonomous vehicles is presented. Based on the three-point problem from land surveying, this navigational technique makes use of angular measurements between fixed beacon pairs. Extremely accurate position information can be obtained over a large area with simple trigonometric or analytic geometry calculations. Typical worst-case errors are of the order of 10 cm throughout a 2500 m² workspace. An experimental position-measuring system has been built and tested, and it demonstrated the ability of this technique to function as a key element in a navigation system for autonomous vehicles     

基于MSP430和CC2500的USB无线数据采集系统

设计基于MSP430单片杌和CC2500无线收发器的USB无线数据采集系统,通过USB调试端口在IDE或CCE开发环境下编写、下栽和调试应用程序,其目标板可作为一个独立的具有或没有外部传感器的系统。介绍基于MSP430和CC2500无线开发工具的系统结构,控制模块的硬件结构,无线收发部分和数据采集传输电路的设计,以及软件开发、Simplici TI协议的引用。     

Low-energy Formulations of Support Vector Machine Kernel Functions for Biomedical Sensor Applications

Although physiologically-indicative signals can be acquired in low-power biomedical sensors, their accurate analysis imposes several challenges. Data-driven techniques, based on supervised machine-learning methods provide powerful capabilities for potentially overcoming these, but the computational energy is typically too severe for low-power devices. We present a formulation for the kernel function of a support-vector machine classifier that can substantially reduce the real-time computations involved. The formulation applies to kernel functions employing polynomial transformations. Using two representative biomedical applications (EEG-based seizure detection and ECG-based arrhythmia detection) employing clinical patient data, we show that the polynomial transformation yields accuracy performance comparable to the most powerful available transformation (i.e., the radial-basis function), and the proposed formulation reduces the energy by over 2500× in the arrhythmia detector and 9.3-198× in the seizure detector (depending on the patient).     

Design and application of a 2500-gate bipolar macrocell array

A very high-speed 2500-gate Si bipolar macrocell array has been developed using a novel macrocell design approach and a 1-/spl mu/m rule advanced super self-aligned process technology (SST-1A). Using this macrocell array, a 16-bit parallel multiplier is designed and fabricated. The sophisticated circuit design of the macrocell array approach permits this complex function, which is equivalent to having 3024 NOR gates, using only 70% of the total of 756 internal cells. Consequently, a fast multiplication time of 7.5 ns is achieved with a 2.07-W power dissipation. Excellent performance with an average gate delay of 120 ps and average power dissipation of 0.365 mW is demonstrated for an equivalent NOR gate.     

轻量级WSN分层协议栈的设计与实现

传统无线网络协议栈存在硬件兼容性弱、内存和CPU占用率高、函数接口复杂等问题,采用此类协议栈将提高项目开发的软硬件成本。设计一种轻量级分层协议栈,通过协议栈架构的分层设计、底层的开放式设计、函数的可重入设计等,使其具有低系统资源占用率、高可移植性和多网卡协同工作的特点。采用IAR EW8051,KEIL MDK,STM32CUBE等作为软件平台,进行协议栈程序的开发与测试。测试结果表明,该协议栈代码量小,可应用于CC1100,CC2500,SI4463, SX1278等无线芯片,且能有效应对复杂环境下的信号干扰,提升点对多通信效果,有较高的实用价值。