The explosion in demand for wireless services experienced over the past 20 years has put significant pressure on system designers to increase the capacity of the systems being deployed. While the spectral resource is very scarce and practically exhausted, the biggest possibilities are predicted to be in the areas of spectral reuse by unlicensed users or in exploiting the spatial dimension of the wireless channels. The former approach is now under intense development and is known as the cogni- tive radio approach (Haykin 2005).
標(biāo)簽： Multi-Antenna Wireless Channels Modeling
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
The planarization technology of Chemical-Mechanical-Polishing (CMP), used for the manufacturing of multi- level metal interconnects for high-density Integrated Circuits (IC), is also readily adaptable as an enabling technology in MicroElectroMechanical Systems (MEMS) fabrication, particularly polysilicon surface micromachining. CMP not only eases the design and manufacturability of MEMS devices by eliminating several photolithographic and film issues generated by severe topography, but also enables far greater flexibility with process complexity and associated designs. T
標(biāo)簽： mechanical polishing Chemical
上傳時(shí)間： 2020-06-06
上傳用戶：shancjb
Since the 1990s the EU has been pursuing climate change mitigation targets. Following the international commitment to the legally binding greenhouse gas reduction under the Kyoto Protocol, the 2020 policy package consists of a set of binding legislation to ensure that the EU meets its climate and energy targets for the year 2020. The package sets three key targets: 20% reduction in greenhouse gas emissions (from 1990 levels), 20% of EU energy from renewables (as well as a 10% target for renewable fuels) and 20% improvement in energy efficiency. The targets were set by EU leaders in 2007 and enacted in legislation in 2009 3 . They are also headline targets of the Europe 2020 strategy for smart, sustainable and inclusive growth.
標(biāo)簽： Preparatory Ecodesign Study
上傳時(shí)間： 2020-06-06
上傳用戶：shancjb
Identification is pervasive nowadays in daily life due to many complicated activities such as bank and library card reading, asset tracking, toll collecting, restricted access to sensitive data and procedures and target identification. This kind of task can be realized by passwords, bio- metric data such as fingerprints, barcode, optical character recognition, smart cards and radar. Radiofrequencyidentification(RFID)isatechniquetoidentifyobjectsbyusingradiosystems. It is a contactless, usually short distance, wireless data transmission and reception technique for identification of objects. An RFID system consists of two components: the tag (also called transponder) and the reader (also called interrogator).
標(biāo)簽： Processing Digital Signal RFID for
上傳時(shí)間： 2020-06-08
上傳用戶：shancjb
Radio frequency identification (RFID) technology is witnessing a recent explosion of development in both industry and academia. A number of applications include supply chain management, electronic payments, RFID passports, environmental monitoring and control, office access control, intelligent labels, target detection and tracking, port management, food production control, animal identification, and so on. RFID is also an indispensable foundation to realize the pervasive computing paradigm—“Internet of things.” It is strongly believed that many more scenarios will be identified when the principles of RFID are thoroughly understood, cheap components available, and when RFID security is guaranteed.
標(biāo)簽： Architectures NETWORKS SENSOR RFID AND
上傳時(shí)間： 2020-06-08
上傳用戶：shancjb
adio Frequency Identification (RFID) is a rapidly developing automatic wireless data-collection technology with a long history.The first multi-bit functional passive RFID systems,with a range of several meters, appeared in the early 1970s, and continued to evolve through the 1980s. Recently, RFID has experienced a tremendous growth,due to developments in integrated circuits and radios, and due to increased interest from the retail industrial and government.
標(biāo)簽： RFID-Enabled Sensors RFID and
上傳時(shí)間： 2020-06-08
上傳用戶：shancjb
Radio frequency identification (RFID) and Wireless sensor networks (WSN) are the two key wireless technologies that have diversified applications in the present and the upcoming systems in this area. RFID is a wireless automated recognition technology which is primarily used to recognize objects or to follow their posi- tion without providing any sign about the physical form of the substance. On the other hand, WSN not only offers information about the state of the substance and environment but also enables multi-hop wireless communications.
標(biāo)簽： Architecture Integrated RFID-WSN
上傳時(shí)間： 2020-06-08
上傳用戶：shancjb
CH340C+RT9013+MINI USB接口板 AD設(shè)計(jì)硬件原理圖+PCB文件,ALTIUM設(shè)計(jì)的2層板設(shè)計(jì)，包括完整的原理圖和PCB文件，主要器件如下：Library Component Count : 12Name Description----------------------------------------------------------------------------------------------------CAP CapacitorCC2640EM CC2630 ModuleCH340 CH340 USB 2 UARTCON11 Connector 11pinsCON12 Connector 12pinsCON3X2 Connector 5*2LED LEDRES ResistorRT9013 RT9013 3.3VSWITCH switch 6*6USB1 USB ConnectorsXDS110-Lte XDS110-Lite Target Interface
標(biāo)簽： ch340c rt9013 usb 接口 ad設(shè)計(jì)
上傳時(shí)間： 2021-11-24
上傳用戶：canderile
PW4203 is a 4.5-22V input, 2A multi-cell synchronous Buck Li-Ion battery charger, suitable forportable application. Select pin is convenient for multi-cell charging. 800 kHz synchronous buckregulator integrates of 22V rating FETs with ultra low on- resistance to achieve high efficiency andsimple circuit design.The PW4203 is available in an 8-pin SOP package, provides a very compact system solution andgood thermal conductance
標(biāo)簽： pw4203
上傳時(shí)間： 2022-02-11
上傳用戶：
首先下載軟件，解壓軟件，安裝在程序中找到SEGGER,選里面的J-FLASH，進(jìn)入界面，剛開(kāi)始的那個(gè)界面可以忽略，不用建project也可以；單擊菜單欄的“Options---Project settings”打開(kāi)設(shè)置，進(jìn)行jlink配置;正在General選項(xiàng)，選擇“USB”，一般都是默認(rèn)配置，確認(rèn)一下即可;然后在CPU選項(xiàng)，選擇芯片型號(hào)，先選擇“Device”才能選擇芯片型號(hào)，芯片型號(hào)，要根據(jù)你使用的芯片進(jìn)行選擇;在Target interface選項(xiàng) 里面選擇SWD模式;首先Target里面選“Connection”連接目標(biāo)芯片，然后 Target--Auto進(jìn)行程序燒寫;首先Target里面選擇“Connection”連接目標(biāo)芯片，然后 Target--Auto進(jìn)行程序燒寫.SEGGER J-Links are the most widely used line of debug probes available today. They've proven their value for more than 10 years in embedded development. This popularity stems from the unparalleled performance, extensive feature set, large number of supported CPUs, and compatibility with all popular development environments.
標(biāo)簽： JLINK
上傳時(shí)間： 2022-03-22
上傳用戶：
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