This application report discusses the design of non-invasive optical plethysmography also called as pulsoximeter using the MSP430FG437 Microcontroller (MCU). The pulsoximeter consists of a peripheral probe combined with the MCU displaying the oxygen saturation and pulse rate on a LCD glass. The same sensor is used for both heart-rate detection and pulsoximetering in this application. The probe is placed on a peripheral point of the body such as a finger tip, ear lobe or the nose. The probe includes two light emitting diodes (LEDs), one in the visible red spectrum (660nm) and the other in the infrared spectrum (940nm). The percentage of oxygen in the body is worked by measuring the intensity from each frequency of light after it transmits through the body and then calculating the ratio between these two intensities.
标签： plethysmography non-invasive application discusses
上传时间： 2014-01-17
上传用户：天诚24
GNU_Radio GNU radio is a free/open-source software toolkit for and the content is controlled by a handful of organizations. Cell building software radios, in which software defines the phones are a great convenience, but the features your phone transmitted waveforms and demodulates the received supports are determined by the operator s interests, not yours. waveforms. Software radio is the technique of getting code A centralized system limits the rate of innovation. Instead of as close to the antenna as possible. It turns radio hardware cell phones being second-class citizens, usable only if problems into software problems.
标签： open-source GNU_Radio software toolkit
上传时间： 2017-06-27
上传用户：拔丝土豆
Steganography is the art of communicating a message by embedding it into multimedia data. It is desired to maximize the amount of hidden information (embedding rate) while preserving security against detection by unauthorized parties. An appropriate information-theoretic model for steganography has been proposed by Cachin
标签： Steganography communicating multimedia embedding
上传时间： 2017-07-29
上传用户：
QualNet Sensor Networks Library QualNet’s new Sensor Networks Library is a much awaited feature set that supports the IEEE 802.15.4 standard, otherwise known as Zigbee. Zigbee networks are Wireless Personal Area Networks (WPANs) that are defi ned by a low data rate, long battery life, and secure networking. Zigbee networks support automation and remote control
标签： Networks QualNet Library Sensor
上传时间： 2017-07-30
上传用户：CSUSheep
a carrier sense multiple access with collision avoidance (CSMA/CA) based MAC protocol, called nanoMAC, suitable for low bit-rate, low-power wireless devices with high efficiency
标签： avoidance collision multiple protocol
上传时间： 2017-08-28
上传用户：小宝爱考拉
RSA ( Rivest Shamir Adleman )is crypthograph system that used to give a secret information and digital signature . Its security based on Integer Factorization Problem (IFP). RSA uses an asymetric key. RSA was created by Rivest, Shamir, and Adleman in 1977. Every user have a pair of key, public key and private key. Public key (e) . You may choose any number for e with these requirements, 1< e <Æ (n), where Æ (n)= (p-1) (q-1) ( p and q are first-rate), gcd (e,Æ (n))=1 (gcd= greatest common divisor). Private key (d). d=(1/e) mod(Æ (n)) Encyption (C) . C=Mª mod(n), a = e (public key), n=pq Descryption (D) . D=C° mod(n), o = d (private key
标签： crypthograph information Adleman Rivest
上传时间： 2017-09-01
上传用户：chfanjiang
卡尔曼滤波在AVR单片机的应用，引脚接法：PC1 (ADC1) Y Accel (Pin 8) PC2 (ADC2) Z Accel (Pin 7) PC3 (ADC3) X rate (Pin 3) PC4 (ADC4) Y rate (Pin 4) PC5 (ADC5) VRef (Pin 5)
上传时间： 2013-12-13
上传用户：dengzb84
调制解调课程设计 16QAM调制解调代码。包括星座图，频谱分析，误码率分析。-16QAM modulation and demodulation curriculum design code modulation and demodulation. Including constellation, spectrum analysis, bit error rate analysis.
上传时间： 2016-05-02
上传用户：ylqylq
主要是实现调制识别，区分几种常用的数字调制信号，包括ASK,FSK,PSK,QAM。含有两个文件夹 其一为特征参数的仿真；其二为正确识别率的仿真。 文件夹key feature simulink中： 运行程序会得到各特征参数之间区分图 从图中可看到特征参数的有效性。 文件夹classification rate simulink中： 运行main.m文件 可以得到正确识别率
标签： qam
上传时间： 2016-05-02
上传用户：ylqylq
Lithium–sulfur batteries are a promising energy-storage technology due to their relatively low cost and high theoretical energy density. However, one of their major technical problems is the shuttling of soluble polysulfides between electrodes, resulting in rapid capacity fading. Here, we present a metal–organic framework (MOF)-based battery separator to mitigate the shuttling problem. We show that the MOF-based separator acts as an ionic sieve in lithium–sulfur batteries, which selectively sieves Li+ ions while e ciently suppressing undesired polysulfides migrating to the anode side. When a sulfur-containing mesoporous carbon material (approximately 70 wt% sulfur content) is used as a cathode composite without elaborate synthesis or surface modification, a lithium–sulfur battery with a MOF-based separator exhibits a low capacity decay rate (0.019% per cycle over 1,500 cycles). Moreover, there is almost no capacity fading after the initial 100 cycles. Our approach demonstrates the potential for MOF-based materials as separators for energy-storage applications.
上传时间： 2017-11-23
上传用户：653357637
