Modern electronic systems solve so many difficult problems that they often seem like magic. Nonetheless, these systems all have thesame basic limitation: they need a source of electrical power! Most of the time this is a straightforward challenge for the electronicdesigner, because there are many power-delivery solutions. Yet sometimes a device has no direct power source, and running wiresor replacing batteries is impractical. Even when long-life batteries are usable, they eventually need to be replaced, which requires aservice call.
标签： 能量收集
上传时间： 2015-01-03
上传用户：zukfu
ACPR (adjacent channel power ratio), AltCPR (alternatechannel power ratio), and noise are important performancemetrics for digital communication systems thatuse, for example, WCDMA (wideband code division multipleaccess) modulation. ACPR and AltCPR are bothmeasures of spectral regrowth. The power in the WCDMAcarrier is measured using a 5MHz measurement bandwidth;see Figure 1. In the case of ACPR, the total powerin a 3.84MHz bandwidth centered at 5MHz (the carrierspacing) away from the center of the outermost carrier ismeasured and compared to the carrier power. The resultis expressed in dBc. For AltCPR, the procedure is thesame, except we center the measurement 10MHz awayfrom the center of the outermost carrier.
上传时间： 2013-11-02
上传用户：maricle
Features • Compatible with MCS-51® Products • 8K Bytes of In-System Programmable (ISP) Flash Memory – Endurance: 1000 Write/Erase Cycles • 4.0V to 5.5V Operating Range • Fully Static Operation: 0 Hz to 33 MHz • Three-level Program Memory Lock • 256 x 8-bit Internal RAM • 32 Programmable I/O Lines • Three 16-bit Timer/Counters • Eight Interrupt Sources • Full Duplex UART Serial Channel • Low-power Idle and Power-down Modes • Interrupt Recovery from Power-down Mode • Watchdog Timer • Dual Data Pointer • Power-off Flag
标签： 8226 Programmable Compatible In-System
上传时间： 2015-06-27
上传用户：dianxin61
Abstract The Lucene Server project is an attempt to extend the Jakarta Lucene tool with server capabilities. Lucene is a robust Java API that enables you creating indexes from text sources and perform powerful searches on these indexes. With Lucene, creating an index must be done programmatically and there are almost no possibilities of integrating index management in a distributed environment. In other words, out of the box, Lucene is suitable for integrating indexing and searching possibilities in a single application but not for providing index/search services for multiple applications. The Lucene Server project comes with a Java API that propose the following make it easy to create indexes in a declarative way by simply providing an XML configuration document. make it easy to personalize the way Lucene must handle different kind of data sources. provide services for index management and searching that can be accessed from several applications. enable batch tasks scheduling.
标签： Lucene Abstract Jakarta project
上传时间： 2016-01-10
上传用户：songrui
这个是用VC++实现的winsnmp的网络管理兼监控的程序，经调试可正常运行通过，希望对大家有所帮助 -this the VC winsnmp network management and monitoring procedures, The tests can be run through the normal, we hope to help
上传时间： 2013-12-14
上传用户：AbuGe
这个是用VC++实现的winsnmp的网络管理兼监控的程序，经调试可正常运行通过，希望对大家有所帮助 -this the VC winsnmp network management and monitoring procedures, The tests can be run through the normal, we hope to help
上传时间： 2013-12-19
上传用户：gundan
用VC和SQL Server开发的固定资产管理系统，包括系统信息管理，固定资产管理和统计查询管理三个大模块-VC and SQL Server development of the fixed asset management system, including system information management, fixed asset management and statistics for the three management module
上传时间： 2016-06-29
上传用户：SimonQQ
SD card controller can just read data using 1 bit SD mode. I have written this core for NIOS2 CPU, Cyclone, but I think it can works with other FPGA or CPLD. Better case for this core is SD clock = 20 MHz and CPU clock = 100 MHz (or in the ratio 1:5). If you have a wish you can achieve this core. Good luck
标签： controller written NIOS2 using
上传时间： 2016-08-12
上传用户：王楚楚
包括使用修正Gram-Schmit算法实现QR分解，自编LU分解、利用幂法和反幂法计算矩阵最大和最小特征值的程序。例外附有使用这些算法的例子供参考。 QR decomposition algorithm based on modified Gram-Schmit LU decomposition algorithm algorithm used to find maximum and minimum eigenvalue based on power and inverse power method and some examples are also included.
标签： Gram-Schmit 正 分解 算法
上传时间： 2016-09-07
上传用户：cooran
Aspect-Oriented Software Developement Coverage includes Using AOSD to streamline complex systems development without sacrificing flexibility or scalability How AOSD builds on the object-oriented paradigmand how it s different State-of-the-art best practices for the AOSD development process Languages and foundations: separating concerns, filter technologies, improving modularity, integrating new features, and more Using key AOSD tools, including AspectJ, Hyper/J, JMangler, and Java Aspect Components Engineering aspect-oriented systems: UML, concern modeling and elaboration, dependency management, and aspect composition Developing more secure applications with AOSD techniques Applying aspect-oriented programming to database systems Building dynamic aspect-oriented infrastructure
标签： Aspect-Oriented Developement streamline Software
上传时间： 2013-12-01
上传用户：jennyzai
