The first Third Generation Partnership Project (3GPP) Wideband Code Division Multiple Access (WCDMA) networks were launched during 2002. By the end of 2005 there were 100 open WCDMA networks and a total of over 150 operators having frequency licenses for WCDMA operation. Currently, the WCDMA networks are deployedinUniversalMobileTelecommunicationsSystem(UMTS)bandaround2GHz in Europe and Asia including Japan and Korea. WCDMA in America is deployed in the existing 850 and 1900 spectrum allocations while the new 3G band at 1700/2100 is expected to be available in the near future. 3GPP has defined the WCDMA operation also for several additional bands, which are expected to be taken into use during the coming years.
标签： HSDPAHSUPA Access Speed Radio UMTS High for
上传时间： 2020-05-27
上传用户：shancjb
Reliable and accurate positioning and navigation is critical for a diverse set of emerging applications calling for advanced signal-processing techniques. This book provides an overview of some of the most recent research results in the field of signal processing for positioning and navigation, addressing many challenging open problems.
标签： Positioning Terrestrial Satellite Radio and
上传时间： 2020-06-01
上传用户：shancjb
This book addresses the issues on the development of next generation CDMA technologies and contains a lot of information on the subject from both the open literature and my own research activities in the last fifteen years.
标签： Technologies Generation Next CDMA The
上传时间： 2020-06-01
上传用户：shancjb
The world of home automation is an exciting field that has exploded over the past few years with many new technologies in both the commercial and open source worlds. This book provides a gateway for those interested in learning more about this topic and building their own projects. With the introduction of the Raspberry Pi computer in 2012, a small and powerful tool is now available for the home automation enthusiast, programmer, and electronic hobbyist. It allows them to augment their home with sensors and software.
标签： Automation Raspberry Home Pi
上传时间： 2020-06-06
上传用户：shancjb
GaN is an already well implanted semiconductor technology, widely diffused in the LED optoelectronics industry. For about 10 years, GaN devices have also been developed for RF wireless applications where they can replace Silicon transistors in some selected systems. That incursion in the RF field has open the door to the power switching capability in the lower frequency range and thus to the power electronic applications. Compared to Silicon, GaN exhibits largely better figures for most of the key specifications: Electric field, energy gap, electron mobility and melting point. Intrinsically, GaN could offer better performance than Silicon in terms of: breakdown voltage, switching frequency and Overall systems efficiency.
标签： GaN-on-Si Displace and SiC Si
上传时间： 2020-06-07
上传用户：shancjb
Modern power systems involve large amount of investment. An electric power system comprises of generation, transmission, and distribution of electric energy. Growth of power systems has led to very complex networks extended across large areas. In such situations, the proper functioning of a modern power system is heavily dependent upon the healthy operation of the transmission lines within it. Transmission lines are used to transmit a huge amount of power over a long distance. But as these lines are located in the open atmosphere, they are highly affected by different types of abnormal conditions or faults.
标签： Transmission Protection Line
上传时间： 2020-06-07
上传用户：shancjb
Since OpenStreetMap (OSM) appeared more than ten years ago, new collaborative mapping approaches have emerged in different areas and have become important components of localised information and services based on localisation. There is now increased awareness of the importance of the space-time attributes of almost every event and phenomenon. Citizens now have endless possibilities to quickly geographically locate themselves with an accuracy previously thought impossible. Based on these societal drivers, we proposed a number of collaborative mapping experiments (“mapping parties”) to delegates of a large open-source geospatial conference and to citizens of the conference’s host city during July 2015.
标签： Information Leveraging Systems Mobile
上传时间： 2020-06-09
上传用户：shancjb
Since its release, Arduino has become more than just a development platform; it has become a culture built around the idea of open source and open hardware, and one that is reimagining computer science and education. Arduino has opened hardware development by making the starting skills easy to obtain, but retaining the complexities of real-world application. This combination makes Arduino a perfect environment for school students, seasoned developers, and designers. This is the first Arduino book to hold the title of “Pro,” and demonstrates skills and concepts that are used by developers in a more advanced setting. Going beyond projects, this book provides examples that demonstrate concepts that can be easily integrated into many different projects and provide inspiration for future ones. The focus of this book is as a transition from the intermediate to the professional.
上传时间： 2020-06-09
上传用户：shancjb
《Delphi7 高效数据库程序设计》出版社： 机械工业出版社 作 者： 李维内容简介 dbExpress是Borland公司下一代数据访问技术。本书不仅详细介绍了dbExpress的基本功能、使用技巧以及Delphi/Kylix的DataSnap技术，还详细讨论了dbExpress的实现原理以及dbExpress的未来发展趋势。本书结构清晰，讲解透彻，实例丰富。作者李维是Borland公司著名技术专家，曾著有多部Delphi名著。通过阅读本书，读者可以充分利用dbExpress的强大功能，开发出高效率的Delphi/Kylix系统。本书适合Delphi/Kylix/C++Builder程序员、数据库程序设计师以及对Delphi/Kylix感兴趣的人员阅读。
上传时间： 2021-12-11
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1运行sigmawin+1.1选择伺服驱动器sigmawin+软件开始运行时，会看到选择连接的对话框，根据实际使用的通信端口来选择伺服驱动器和PC的连接。选择连接伺服驱动器的方式：在线或离线状态，在线状态是默认设置在线方式：当要对伺服驱动器进行调谐和设置时需要使用在线方式离线方式：当要对参数进行调整以及检查屏幕显示和机械分析时使用离线方式当采用离线方式时选择相应系列的伺服，之后会出现sigmawin+软件的主窗口当选择在现方式时之后进行必要的通信端口的选择点击search按钮，搜索当先连接的端口，注：2-V为USB端口点击search按钮，当驱动器和PC成功连接后会出现如下对话框点击出现的相应型号的伺服驱动器然后按connect按钮或者直接双击伺服驱动器来进行连接，sigmawin+软件的主窗口就会出现，点击cancel关闭当前对话框。Sigmawin+连接2-V后出现主窗口所有的应用功能都可以通过菜单栏或工具栏上面使用1.2工具栏直接点击工具栏上的图标就可以使用相应的功能1.3参数设定伺服驱动器的参数可以在离线模式和在线模式下进行设置，但是这两种状态下的参数设置画面是不同的。1.4参数的转换在sigmawin+软件主窗口中，点击parameters然后点击parameter converter选择需要转换的参数文件，即其他系列的伺服驱动器，点击open选中的文件将被导入，源文件对应的驱动器的型号会显示在conversion source中。转换后对应的驱动器型号也会在conversion destination中自动设置。注：如果选择了不能转换的文件，会出现以下对话框提示你选择了不能转换的文件。点击convert已选择的之前系列的驱动器参数文件将被转换成和2-V系列驱动器相一致的参数数据，而且会保存在新建的参数文件中。转换完成后，转换结果会显示在参数转换窗口中。如下：
标签： sigmawin
上传时间： 2022-05-31
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