ID 原文 译文
21455 拟牛顿法则克服了这个缺点，利用BFGS公式计算Hesse矩阵的近似矩阵，只需要计算1阶导数信息。 The quasi Newton method overcomes this shortcoming and uses BFGS formula to calculate the approximate matrix of the Hessian matrix, it only needs the first derivative information.
21456 该文在SL0算法的基础上，结合BFGS拟牛顿法，提出一种改进的压缩感知信号重构算法。 On the basis of SL0 algorithm and BFGS quasi Newton method, an improved reconstruction algorithm for Compressed Sensing (CS) signal is proposed.
21457 首先采用最速下降法迭代得到信号的某个估计值，然后将此估计值作为拟牛顿法的初值继续迭代，直至得到最优解。 The steepestdescent method is first used to get an estimated value, and then is taken as the initial value of quasi Newton method, using BFGS method to update the iterative direction until retaining the optimal solution.
21458 计算机仿真结果表明，在相同的条件下，该算法在重构精度、峰值信噪比和重建匹配度等方面均有较大提高。 The simulation results show that the proposed algorithm has great improvement in reconstruction accuracy, peak signal to noise ratio and reconstruction matching degree.
21459 针对当前室外蜂窝网多基站定位需要基站之间时间同步、数据同步的要求，以及NLOS环境造成的非服务区基站的信号可测性问题，该文提出基于B-LM圆环模型的NLOS信息约束单基站定位算法。 Considering the requirements of time and data synchronization in multi-BS (Base Station) positioning in the current outdoor cellular network and the problem of signals' detectability in area without service BS due to NLOS (Non-Line-Of-Sight) environment, a single base station localization algorithm based on B-LM (Broyden Fletcher Goldfarb Shanno-Levenberg Marquard) ring of scattering model using NLOS information is proposed.
21460 首先根据散射体、目标和基站间的几何位置关系以及NLOS多路径信息构建定位方程，然后将定位方程转化为最小二乘优化问题，之后基于LM算法海森矩阵修正思想和拟牛顿2阶偏导构造思想提出B-LM算法，保证算法收敛于最优解，以得到目标位置。 Firstly, the localization objective equation is constructed according to the geometric positions of the scatterers, the target, the base station and the NLOS multipath information. Then, the localization equation is transformed into the least square optimization problem. Finally, the B-LM algorithm based on Hessian matrix modification methodology in LM algorithm and the construction of second order partial derivative in quasi-Newton algorithm is proposed, which ensures the localization algorithm converges to the optimal solutions to obtain the target's location.
21461 仿真结果表明，所提单基站定位算法能在宏蜂窝NLOS环境实现较高的定位精度。 The simulation results show that the proposed single base station localization algorithm can achieve a high positioning accuracy in the NLOS environment for macrocell.
21462 航空公司外航服务人员排班旨在优化员工排班方案以满足外航航班的人员资质需求，并最小化员工总工作时长和兼顾工作时间均衡，其本质是一个面向多任务类型、员工层次资质、白夜班轮换等约束的人员排班问题。 Scheduling staffs servicing alien airlines aims to yield task-person assignments by covering the required skills and minimizing employee total working hours as well as balancing staffs' workload. Its essence is a personnel scheduling problem constrained by multiple task types, hierarchical skills as well as day and night alternation.
21463 现有算法未考虑白夜班轮换强制性约束，制约了它们的应用。 The existing algorithms do not consider the constraint of day and night alternation.
21464 为此，该文提出基于Block Gibbs的航空公司外航服务人员排班算法。 An algorithm is proposed to address that issue.