This a collection of sample processes that provide examples ranging from how to use a particular BPEL activity such as pick or scope, to more complex examples of processes that invoke external Web services or show techniques such as handling multiple start messages.
標簽： collection particular processes examples
上傳時間： 2013-12-26
上傳用戶：sunjet
uwb ranging applications
標簽： applications ranging uwb
上傳時間： 2017-03-21
上傳用戶：xzt
當前全球定位系統(tǒng)（Navigation Satellite Timing And ranging Global Position System，簡稱GPS）廣泛應用于艦船導航，航空航天，地理測繪等領域，特別是移動式定位系統(tǒng)對于目前的城市交通管理有著非常重要的意義。本文分析了當前交通管理中的實際問題，介紹了一種車載終端的設計方法。設計采用ARM9內(nèi)核的S3C2410微處理器構造的嵌入式系統(tǒng)，可以實現(xiàn)對GPS定位信息的接受和處理，并采用嵌入式Linux操作系統(tǒng)，結合開放式Linux圖形軟件Qt，可以為后續(xù)的建立地理信息系統(tǒng)（Geographic information system，簡稱GIS）提供數(shù)據(jù)支持，是集GPS全球衛(wèi)星定位系統(tǒng)和通用分組無線業(yè)務（General Packet Radio Service，簡稱GPRS）無線通信技術于一體的新型電子產(chǎn)品。它為現(xiàn)代交通運輸提供了新穎，可靠，有效的控制和管理途徑。 車載終端通過將GPS模塊的定位信息提取出來，一方面將定位信息在車載終端上顯示，一方面又結合車輛的狀態(tài)信息通過GPRS模塊發(fā)送出去，該信息通過無線公共網(wǎng)絡傳輸給車輛管理部門。車輛管理部門根據(jù)車輛的位置和狀態(tài)等，結合GIS系統(tǒng)中的地圖信息提供GPS數(shù)據(jù)的差分修正，并采取一定的措施，從而實現(xiàn)車輛的有效管理。 本設計從硬件和軟件兩大部分出發(fā)，硬件上設計了ARM處理器、存儲器、內(nèi)存及其外圍電路，另外還有GPS模塊電路和GPRS模塊電路；軟件上采用Qt的人機界面完成數(shù)據(jù)顯示與更新，采用PPP撥號腳本完成GPRS模塊的撥號，通過Qt多線程編程的方法完成GPS數(shù)據(jù)的提取和GPRS的信息發(fā)送。在硬件和軟件之間采用了嵌入式Linux系統(tǒng)，包括啟動代碼、內(nèi)核和文件系統(tǒng)等。
標簽： ARM GPS 定位 系統(tǒng)設計
上傳時間： 2013-04-24
上傳用戶：夜月十二橋
Many thermal metrics exist for integrated circuit (IC) packages ranging from θja to Ψjt.Often, these thermal metrics are misapplied by customers who try to use them to estimate junction temperatures in their systems.
上傳時間： 2013-10-18
上傳用戶：貓愛薛定諤
This document provides practical, common guidelines for incorporating PCI Express interconnect layouts onto Printed Circuit Boards (PCB) ranging from 4-layer desktop baseboard designs to 10- layer or more server baseboard designs. Guidelines and constraints in this document are intended for use on both baseboard and add-in card PCB designs. This includes interconnects between PCI Express devices located on the same baseboard (chip-to-chip routing) and interconnects between a PCI Express device located “down” on the baseboard and a device located “up” on an add-in card attached through a connector. This document is intended to cover all major components of the physical interconnect including design guidelines for the PCB traces, vias and AC coupling capacitors, as well as add-in card edge-finger and connector considerations. The intent of the guidelines and examples is to help ensure that good high-speed signal design practices are used and that the timing/jitter and loss/attenuation budgets can also be met from end-to-end across the PCI Express interconnect. However, while general physical guidelines and suggestions are given, they may not necessarily guarantee adequate performance of the interconnect for all layouts and implementations. Therefore, designers should consider modeling and simulation of the interconnect in order to ensure compliance to all applicable specifications. The document is composed of two main sections. The first section provides an overview of general topology and interconnect guidelines. The second section concentrates on physical layout constraints where bulleted items at the beginning of a topic highlight important constraints, while the narrative that follows offers additional insight.
上傳時間： 2013-10-15
上傳用戶：busterman
In industrial applications, high voltage power supply spikes with durations ranging from a few microseconds to hundreds of millisecondsare commonly encountered. The electronics in these systems must not only survive transient voltage spikes, but in many cases alsooperate reliably throughout the event.
標簽： 電信 數(shù)據(jù)通信 工業(yè) 電源產(chǎn)品
上傳時間： 2013-11-07
上傳用戶：redmoons
Automotive batteries, industrial power supplies, distributedsupplies and wall transformers are all sources ofwide-ranging high voltage inputs. The easiest way to stepdown these sources is with a high voltage monolithicstep-down regulator that can directly accept a wide inputrange and produce a well-regulated output. The LT®3493accepts inputs from 3.6V to 36V and LT3481 acceptsinputs from 3.6V to 34V. Both provide excellent lineand load regulation and dynamic response. The LT3481offers a high effi ciency solution over a wide load range andkeeps the output ripple low during Burst Mode® operationwhile the LT3493 provides a tiny solution with minimalexternal components. The LT3493 operates at 750kHzand the LT3481 has adjustable frequency from 300kHzto 2.8MHz. High frequency operation enables the use ofsmall, low cost inductors and ceramic capacitors.
標簽： 寬 輸入 降壓型穩(wěn)壓器
上傳時間： 2014-12-24
上傳用戶：Pzj
Abstract: As electronic systems take over many of the mechanical functions in a car—ranging from engine timing to steering andbraking—there is a growing concern about fault tolerance. There should not be a single point of failure that would prevent a car fromat least "limping" off the road or making it to the nearest service station. Redundant systems, watchdog timers, and other controlcircuits are used to reroute signals and perform other functions that ensure that a vehicle can safely make it off the road when afailure occurs.
標簽： 看門狗定時器 汽車安全系統(tǒng)
上傳時間： 2013-11-10
上傳用戶：diets
針對目前汽車追尾事件頻發(fā)問題，提出一種防汽車車前和車后追尾的安全裝置設計。該設計以高性能、低功耗的8位AVR微處理器ATmega8L為核心，結合霍爾式車速傳感器、激光雷達測距裝置和MMA7260QT加速度傳感器，能夠兼顧車前和車后，摒棄以往設計中只考慮車前或車后單一性缺點，尤其適用于高速、夜晚或新手行車。 Abstract: Aiming at the high frequency of vehicle rear-end collision，a safe device design of anti-vehicle rear-end collision is presented.In the design，the high-performance，low-power8-bit AVR microprocessor ATmega8L is utilized as a core combined with Hall-type speed sensor，laser-radar ranging devices and the acceleration sensor MMA7260QT.The design considers both the front and back of a car，and overcomes the drawbacks of former designs in which only the front or the back of the car is considered，so it is especially suitable for high-speed，night or the beginner’s driving.
上傳時間： 2013-10-14
上傳用戶：GavinNeko
設計一種應用于某全地形ATV車載武器裝置中的中控系統(tǒng)，該系統(tǒng)設計是以TMS320F2812型DSP為核心，采用模塊化設計思想，對其硬件部分進行系統(tǒng)設計，能夠完成對武器裝置高低、回轉(zhuǎn)方向的運動控制，實現(xiàn)靜止或行進狀態(tài)中對目標物的測距，自動瞄準以及按既定發(fā)射模式發(fā)射彈丸和各項安全性能檢測等功能。通過編制相應的軟件，對其進行系統(tǒng)調(diào)試，驗證了該設計運行穩(wěn)定。 Abstract: A central control system applied to an ATV vehicle weapons is designed. The system design is based on TMS320F2812 DSP as the core， uses modular design for its hardware parts. The central control system can complete the motion control of the level of weapons and equipment， rotation direction， to achieve a state of static or moving objects on the target ranging， auto-targeting and according to the established target and the projectile and the launch of the security performance testing and other functions. Through the development of appropriate software and to carry out system testing to verify the stability of this design and operation.
標簽： ATV-ATT DSP 中控系統(tǒng)
上傳時間： 2013-11-02
上傳用戶：jshailingzzh
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