OFDM同步算法中的最大似然函数法程序

数据挖掘课程设计----图书馆系统数据挖掘SSIS SSAS SSRS

时间窗的车辆路径问题进行研究，建立以最小化车辆数量和行驶路程为目标的多目标数学模型，提出一种结合改进差分进化算法和变邻域下降搜索的基于Pareto支配的混合差分进化算法。首先重新定义了个体的生成方式。其次，结合双种群策略和变邻域下降搜索技术来平衡算法的全局探索能力和局部开发能力，并在搜索过程中用随机个体替代种群中的重复个体，维持种群的多样性。然后引入Pareto支配的概念来评价个体的优劣性，并采用擂台法则构造非支配解集其中,N是种群规模,gem为当前进化代数, gem为最大进化按照这种方法,直到所有的顾客都被服务。这种解码方法可代数。以使解码后的路径和解码前染色体中所对应的路径方案·在进化过程中,采用双种群机制,使算法既能从局部极值致,并且使用车辆的数量可以在解码过程中灵活动态地获得,的邻域跳转到全局最优解的邻域,又能在全局最优解的邻域从而实现对车辆数量的自动寻优。例如染色体串361857内进行精细搜索,在每代进化完后通过子种群重组实现信息294,经过路径解码为:路线1:0→3→-6→0;路线2:0→1→8交流和融合,平衡算法的全局探索能力和局部开发能力→57→0;路线3:0→2→9-4→0随着进化过程的进行,种群中的个体会趋于一致,因此在3.3.2初始种群生成每次执行完变异、交义、选择操作后,采用随机个体替换掉种产生初始种群时,为了保证种群的多样性,其中90%的群中的重复个体,维持种群的多样性,以增强种群的全局探索个体采用N个顾客节点随机排列的方式来产生,应用前向插能力,然后从种群中随机选取若干个个体进行变邻域下降搜启发式算法(PFH)来生成剩下10%的个体。索进一步提高算法的局部开发能力降低算法陷入局部最优3.3.3变异操作的风险。鉴于标准差分进化算法采用实数编码,不能直接应用于3.2算法步骤VRPW问题,由于采用了自然数编码,因此重新设计了变异基丁以上的算法思想描述,混合差分进化算法的具体步操作方式来产生变异个体。由标准DE算法可知,变异个体骤如下是由目标种群中随机选择的3个目标个体相互作用的结果步骤1设置算法的相关参数,生成算法的初始种群设记x=[x,x2,…,x]V=[1,2,进化代数gen=0;[uE,1,t2,…,n]分别为第G代目标种群变异种群和试验步骤2根据 Pareto支配思想对种群中的个体适应值进种群的第z个个体。行评价,利用擂台法则和拥挤距离机制将种群个体分层排序,(1)P1子种群采用“DE/best/1”变异策略,重新定义得到每个个体的非支配层等级和拥挤距离值;v=g(F⑧g(x,Y),X)步骤3按照个体的非支配层等级和拥挤距离,并根据式中,1r2是区间[1,n里互不相等的整数;X是当前目式(12)式(13将种群划分为两个不同大小的子群P1和P2标种群中最好的个体,在本文中从非支配层等级序号最小的步骤4P1子群执行DE/bes1变异策略,P2子群执行非支配层中随机选取;F为缩放因子,且F∈[0,门DE/rand/1变异策略,并根据3.3.4节执行交叉操作;式(14)由两部分组成,第一部分为步骤5将初始种群与子群P1、P2重组为一个混合种△=F⑧g(X°,Y)群g(班,X),rand()

如何对彩色图像中的目标进行快速、精确的有效分割是计算机视觉和图像分析的重点和难点。提出了一种基于区域的彩色图像分割方法。该方法首先选择合适的彩色空间,提取出图像中的每个像素点的颜色、纹理、位置等综合特征,形成特征向量空间;在特征空间中,运用改进的ISODATA算法自适应地确定初始聚类数目和聚类中心,然后对图像进行聚类和区域分割,最后抽取出图像区域的特征,并与相类似的方法进行了比较实验。实验结果表明,该方法能够产生较好的分割效果及较快的分割速度,适合于基于图像区域检索系统,具有较好的应用价值。

UCI机器学习库中的wine数据集及其描述

本书揭示硬件架构的设计艺术，涵盖作者从事芯片设计行业十多年的经验和研究成果。本书共分9章，第1章介绍亚稳态的概念、量化方法和减少其影响的技术；第2章介绍同步设计的时钟技术，并提出可行的时钟方案以及系统复位策略。第3章介绍在设计中使用异步时钟或“处理多个时钟”时会出现的问题及解决方法。第4章介绍时钟分频器的各个方面和实现方法。第5章讲述低功耗设计技术，以减少动态和静态功耗。第6章介绍如何把流水线技术应用在处理器的设计中，从而提高性能；第7章讨论使用字节顺序的方法；第8章阐述去抖动技术，以消除毛刺和噪声。第9章介绍电磁干扰的原理、规程、标准和认证，以及电磁干扰的影响因素和减少电磁干扰的方法。

通过MATLAB对发现的目标属性进行分析判断，对威胁等级进行排序，代码实测有效。

MarkEzd.dll 是北京金橙子科技有限公司提供给用户用于ezcad2和lmc1控制卡二次开发的动态连接库。文件包含(C#接口实现代码以及SDK)

使用CC2591作为CC2530的功放, CC2591 PAThe absolute maximum ratings and operating conditions listed in the CC2530 datasheet [1]and the CC2591 datasheet [4] must be followed at all times. Stress exceeding one or more ofthese limiting values may cause permanent damage to any of the devicesNote that these characteristics are only valid when using the recommended register settingspresented in Section 4.6 and in Chapter 8, and the CC2530 - EM reference designOperating Frequency240524835MHzOperating Supply Voltage2036VOperating Temperature-40CTC=25C, VDD=3.0V, f=2440 MHz if nothing else is stated. All parameters are measuredon the CC2530-Cc2591EM reference design [11] with a 50 Q2 loadReceive CurrentWait for sync, -90 dBm input levelWait for sync, -50 dBm input level24mATXPOWER OXE5166mATXPOWER OXD5149mATXPOWER OXC5138mATXPOWER OXB5127mATransmit currentTXPOWER OXA5115ATXPOWER = 0X95100mATXPOWER = 0X8594ATXPOWE=0×75mATXPOWE=0×6579APower Down Current PM2UAISTRUMENTSPage 3 of 19SWRA308ATC=25C, Vdd=3.0V, f= 2440 MHz if nothing else is stated. All parameters are measuredon the CC2530-CC2591 EM reference design with a 50 Q2 loadReceive Sensitivity HGM 1 %PER, IEEE 802. 15.4[6] requires -85 dBm-988dBmReceive Sensitivity LGM1 PER, IEEE 802. 15.4 [6] requires -85 dBm-90.4dBmSaturationlEEE 802.15. 4 [6] requires-20 dBm10dBmWanted signal 3 db above the sensitivity levelIEEE 802.15.4 modulated interferer at ieee 802.15.4 channelsInterferer Rejection+5 MHz from wanted signal, IEEE 802. 15. 4 [6] requires 0 dBdB+10 MHz from wanted signal, IEEE 802. 15. 4 [6] requires 30 dB49dB+20 MHz from wanted signal wanted signal at- 82d BmdBdue to in the external lna and the offset in cc2530 the rssi readouts from cc2530CC2591 is different from rssi offset values for a standalone cc2530 design the offsetvalues are shown in table 4.4High Gain Mode79LoW Gain mode67Real rssi Register value-Rssl offsetISTRUMENTSPage 4 of 19SWRA308ATc=25C, Vdd=3.0V, f=2440 MHz if nothing else is stated All parameters are measuredon the CC2530-CC2591 EM reference design with a 50 Q2 load Radiated measurements aredone with the kit antennaRadiated Emissionwith TXPOWer Oxe5Conducted 2. RF (FCC restricted band)-462|dBmConducted 3. RF(FCC restricted band46.5 dBmComplies withFCC 15.247. SeeChapter 7 for moredetails about regulatoryRadiated 2.RF(FCC restricted band)42.2dBmrequirements andcomplianceIEEE 802.15.4[6]requires max.35%%Measured as defined by IEEE 802.15. 4 6TXPOWER OxE5. f= EEE 802.15. 4 channels13TXPOWER= OXD5. f= EEE 802.15.4 channelsTXPOWER= OXC5 f= EEE 802.15.4 channelsMax error∨ ectorTXPOWER OxB5 f= IEEE 802.15. 4 channelsMagnitude(EVM)TXPOWER OxA5. f= IEEE 802.15.4 channelsTXPOWER 0X95. f= IEEE 802. 15.4 channels643333%%%%%%%TXPOWER= 0x85. f= iEEE 802. 15.4 channelsTXPOWER =0x75 f= IEEE 802. 15.4 channels%TXPOWER= 065. f= iEEE 802. 15.4 channelsThe RF output power of the CC2530- CC2591 EM is controlled by the 7-bit value in theCC2530 TXPOWER register. Table 4.6 shows the typical output power and currentconsumption for the recommended power settings The results are given for Tc= 25 C, Vdd3.0V and f= 2440 MHz, and are measured on the cC2530-CC2591 EM reference designwith a 50 Q2 load. For recommendations for the remaining CC2530 registers, see Chapter 8 oruse the settings given by SmartRF StudioOXE520166OxD519149OxC18138OxB517127OxA5161150x95141000x8513940X75860x651079Note that the recommended power settings given in Table 4.6 are a subset of all the possibleTXPOWER register settings. However, using other settings than those recommended mightINSTRUMENTSPage 5 of 19SWRA308Aresult in suboptimal performance in areas like current consumption, EVM, and spuriousemissionTc=25C, Vdd=3.0V, f=2440 MHz if nothing else is stated All parameters are measuredon the CC2530-CC2591EM reference design with a 50 32 load2221-2V201918171611121314151617181920212223242526251510OxE5OxC5OxA50X850x65540-30-20-1001020304050607080ISTRUMENTSPage 6 of 19SWRA308A98Avg 3.6VAva 3vAvg 2V110111213141516171819202122232425261023.6V-1062V-110-40-30-20-100102030405060708070604020-Wanted signal at:-82 dBm10ISTRUMENTSPage 7 of 19SWRA308ACC2530-CC2591EM High Gain ModeC C2530-CC2591EM Low Gain Mode- CC2530EM40000-100110100908070-60-50-40-30-20-100The IEEE standard 802.15. 4 [8] requires the transmitted spectral power to be less than thelimits specified in table 4.7If-fc>3.5 MHz-20 dB-30 dBmThe results below are given for Tc=25 C, Vdd=3.0V and f= 2440 MHz, and are measuredon the CC2530-CC259 1EM reference design with a 50 Q loadIEEE absoluteChannel 182432.52435243752442524452447.5ISTRUMENTSPage 8 of 19SWRA308AOnly a few external components are required for the CC2530-CC2591 reference design. Atypical application circuit is shown below in Figure 5.1. Note that the application circuit figuredoes not show how the board layout should be done. The board layout will greatly influencethe RF performance of the CC2530-CC2591EM. TI provides a compact CC2530CC2591 EM reference design that it is highly recommended to follow. The layout, stack-upand schematic for the CC2591 need to be copied exactly to obtain good performance. Notethat the reference design also includes bill of materials with manufacturers and part numbersL102 L10=TI INF inductorVDD13cc2530LA 1RF PANTCC2591 RF NFNPA EN(P1 1)i工工I NA FNP:1HGM ENPO 7)T:1Proper power supply decoupling must be used for optimum performance. In Figure 5.1, onlythe decoupling components for the CC2591 are shown. This is because, in addition todecoupling, the parallel capacitors C11, C101, and C131 together with, L101, L102, TL11TL101 and TL131 also work as RF loads. These therefore ensure the optimal performancefrom the CC2591. C161 decouples the AvDD blAs power.The placement and size of the decoupling components, the power supply filtering and thePCB transmission lines are very important to achieve the best performance Details about theimportance of copying the CC2530-CC2591EM reference design exactly and potentialconsequences of changes are explained in chapter 6The RF input/output of CC2530 is high impedance and differential. The CC2591 includes abalun and a matching network in addition to the PA, LNa and RF switches which makes theinterface to the CC2530 seamless. Only a few components between the CC2530 andCC2591 necessary for RF matching For situation with extreme mismatch(VSWR 6: 1 till 12: 1out-of-band as shown in Figure 6.2) it is recommended to include all the components asshown in Figure 5.1ISTRUMENTSPage 9 of 19SWRA308ANote that the PCB transmission lines that connect the two devices also are part of the RFmatching. It is therefore important to copy the distance between the devices, the transmissionlines and the stack-up of the PCB according to the reference design to ensure optimumperformanceThe network between the CC2591 and the antenna(L111, C112, C111 C113 and L112matches the CC2591 to a 50 2 load and provides filtering to pass regulatory demands. C111also works as a dc-blockR151 is a bias resistor the bias resistor is used to set an accurate bias current for internaluse in the cc2591The TI reference design contains two antenna options. As default, the Sma connector isconnected to the output of CC2591 through a 0 Q2 resistor. This resistor can be soldered offand rotated 90 clockwise in order to connect to the PCB antenna, which is a planar invertedF antenna(PIFA). Note that all testing and characterization has been done using the SMAconnector. The PCB antenna has only been functionally tested by establishing a link betweentwo EMs. Please refer to the antenna selection guide [6] and the Inverted F antenna designnote [7 for further details on the antenna solutionsISTRUMENTSPage 10 of 19SWRA308A

这些MATLAB的M文件分为两部分：程序清单A中收录了产生PPM-TH和PAM-DS这两个信号源的所有函数；程序清单B中收录了加性高斯白噪声（AWGN）信道建模，正交和非正交单脉冲PPM-TH接收机结构，以及反极性PAM-DS单脉冲接收机结构仿真所需的所有函数。

基于matlab的车牌识别的源程序（可以实现），其中包括车牌定位，车牌矫正，字符分割，字符识别4部分。还有已训练好的BP神经网络用于字符识别。