ID | 原文 | 译文 |
57548 | 此外,根据 QIMMA 系统特性,推导出了平均误码率的理论值. | In addition,analysis of the average bit error rate is de- rived according to the characteristics of QIMMA system. |
57549 | 仿真结果表明,理论结果在中高信噪比范围内与数值仿真结果近乎一致. | It is shown that it coincides very well with their theoretical counterparts in the range of middle and high signal-to-noise ratio. |
57550 | 为优化移动通信网络的覆盖性能,针对天线指向变量中方位角与下倾角的内在关联性,提出了四元数域粒子群优化算法.该算法利用四元数表示天线指向,并基于四元数域乘法所表示的旋转实现粒子群算法的可行解沿最短路径进行更新. | Aiming at the inherent correlation of azimuths and tilts of the antennas installed on the base stations,a quaternion-based particle swarm optimization algorithms is proposed to optimize the coverage performance for mobile networks,in which the quaternions represents the antenna orientations,and the rotations formed by the multiplication in the quaternion field ensures that the feasible solutions,that is the particles,update along the shortest paths. |
57551 | 由于四元数域乘法不符合交换律,故在无穷小移动的概念上进一步提出了调和四元数粒子群优化算法,使粒子群中可行解的更新与惯性速度、朝向个体历史最优解和全局最优解的移动次序无关. | Moreover,the author considers the process to perform infini- tesimal movements towards different directions in turn and thus introduced a blending quaternion-based particle swarm optimization algorithm to overcome the problems that the destination of the particle move- ment depends upon the order of directions including along the inertial velocity,towards the individual his- torical optimal solution and towards the global optimal solution,which is indeed caused by the anti-com- mutative law of quaternions. |
57552 | 实验结果表明,提出的两类算法,特别是调和算法在收敛速度和覆盖性能上均优于经典粒子群算法、萤火虫算法和遗传算法. | Simulations show that the proposed algorithms,especially the latter,perform better than the canonical particle swarm algorithm,firefly algorithm and genetic algorithm both in the con- vergence efficiency and the final optimized coverage. |
57553 | 针对低密度奇偶校验( LDPC) 码的译码算法复杂度和译码性能的均衡,为了提高译码算法的可靠性和适用性,在自纠正最小和( SCMS) 算法的基础上,提出了一种动态自纠正最小和( DSCMS) 算法. | Aiming at the trade-off between the decoding complexity and the decoding performance of low- density parity check ( LDPC) codes,and improving the reliability and applicability of the decoding algo- rithm,a dynamic self-corrected minimum sum( DSCMS) algorithm is proposed based on the self-corrected minimum sum( SCMS) algorithm. |
57554 | 该算法在迭代译码的过程中,根据变量节点消息设置阈值,明确了 SCMS 算法中对消息可靠性的判断,提高了算法的误码特性和收敛特性. | In the process of iterative decoding,the algorithm sets the threshold ac- cording to the variable node message,clarifies the judgement of the message reliability in SCMS,and im- proves the error characteristics and convergence characteristics of the algorithm. |
57555 | 仿真结果表明,所提出的 DSCMS 算法的误码性能和收敛性能都要优于 SCMS 算法及其改进算法. | Simulation results show that the error performance and convergence performance of DSCMS are better than those of SCMS. |
57556 | 当编码效率为1 /2 时,DSCMS 算法与 SCMS 算法相比,最多能降低 7.15% 的迭代次数. | When the coding rate is 1 /2,the number of iterations of DSCMS can be reduced by up to 7. 15% compared with SCMS. |
57557 | 为了提高对于乳腺癌差异基因筛选的准确率,从分子层面出发,结合拷贝数与基因表达两方面特征,分析了乳腺癌差异表达基因,研究了乳腺癌的发病机制,为乳腺癌的诊疗提供了新的研究思路. | In order to improve the accuracy of screening differential genes for breast cancer,the differenti- al expression genes of breast cancer was analyzed from the molecular level,combined with the characteris- tics of copy number and gene expression,studied the pathogenesis of breast cancer and provided new re- search ideas for the diagnosis and treatment of breast cancer. |