ID 原文 译文
22845 基本宽线算子采取逐像素移动模板的方式检测图像中的宽线特征，与之不同，随机移动宽线算子在检测时，随机地在图像中放置检测模板，并根据当前像素类型采用启发式的准则确定模板移动的策略，从而加快了模板移动速度，较好地消除了基本宽线检测算法中的冗余运算； Instead of moving the mask pixel by pixel to detect wide lines as did in the basic implementation, the randomized moving wide line detector places the mask in the image randomly, and then determines the mask moving strategy heuristically according to the current pixel. In this way, the mask moving is accelerated, leading to obvious decrease of computational redundancy in the basic detector.
22846 在此基础上，提出了两种提前结束条件，可根据检测情况提前结束循环，进一步节省了运算量。 Furthermore, two early termination conditions are proposed to break out of the detecting loop based on the detection situation of wide lines.
22847 利用测试图像对快速算子进行了实验分析，结果表明，随机移动宽线算子在取得相当检测性能的同时，提高了基本宽线算子的运算速度。 Testing images are adopted for performance evaluation of the randomized moving wide line detector. Experimental results demonstrate that the proposed detector accelerates the basic wide line detector significantly while keeping its detection performance unaffected.
22848 针对无线传感器网络分布式迭代定位中误差的传播和累积问题，该文首先分析了锚节点几何形状对定位误差的影响，提出了基于几何精度因子的误差控制算法，巧妙设计了加权策略，将锚节点几何形状对定位精度的影响以权值的形式定量体现在迭代定位过程中，在每一轮迭代中有效控制了误差的传递，进而提高了整个网络的分布式定位精度。 To solve the problem of error propagation and accumulation in distributed multihop iterative localization process in wireless sensor networks, the localization error influence of anchor geometry is firstly analyzed and an error control algorithm based on Geometric Dilution Of Precision (GDOP) is proposed. By designing a delicate weighting scheme, the error magnification effect of geometry is quantitatively involved in terms of weight which effectively control error propagation in every iterative step and improve distributed localization accuracy of the whole network.
22849 与传统的最小二乘定位算法和基于轮数的误差控制算法进行了仿真比较，结果表明，基于几何精度因子的误差控制算法定位性能最优，网络定位精度分别提高了 25%和 15%。 The performance evaluation shows that, compared with classic iterative localization algorithm based on least squared estimation and another weighted algorithm based on iterative round, localization precision of GDOP weighted algorithm is improved by 25% and 15% respectively.
22850 该文提出一种基于虚拟信道的空时优化多输入多输出(MIMO)无线传输系统。 A space-time optimized Multiple-Input Multiple-Output (MIMO) wireless transmission system based on virtual channel method is proposed.
22851 通过在发射端产生不同的空时虚拟信道，与实际空间无线信道级联，构成系统的整体传输信道即协同空分信道。 At the transmitter, various space-time virtual channels are generated that are connected with the actual space wireless channels to form the cooperative space division channels.
22852 系统可以根据接收端的反馈信息采用模拟退火算法来优化虚拟信道，改善误码率(BER)性能。 According to the feedback information from the receiver, the Bit Error Rate (BER) can be significantly improved by using the simulated annealing algorithm to optimize the virtual channels.
22853 利用虚拟信道方法，可以使一根 MIMO 发射天线在同一时间、同一频段传输多路叠加合并后的数据信号，从而可以使发射的不同数据信号的总路数超过发射天线的数量，突破了现有 MIMO 系统在同一时间、同一频段最多只能发射与发射天线数量相等的不同数据信号的传统方式，可以显著提高系统的频谱效率。 Morever, by using the virtual channel method, it allows one MIMO antenna to transmit multiple superposed data streams in one frequency band at the same time, therefore it can transmit more number of different data streams than the number of transmit antennas, breaking the conventional way that the number of different data streams to be transmitted is equal to the number of transmit antennas. Thus, the proposed MIMO system can significantly improve the spectral efficiency.
22854 仿真结果和基于 ZC706 和 AD9361 硬件平台的微波暗室实际测试结果充分验证了新 MIMO 系统的有效性。 Simulation results and experimental test results based on ZC706 and AD9361 hardware platforms in microwave anechoic chamber fully demonstrate the effectiveness of the proposed MIMO system.