弹道滤波算法研究

为导引我方发射的制导炮弹等目标,需要在炮瞄雷达跟踪炮弹的基础上准确估计炮弹目标的位置、速度等状态信息。鉴于直接对测量的弹道轨迹建立常规运动模型滤波效果较差,提出了两种方法。一种基于弹道偏差滤波的方法,另一种是基于弹道方程滤波方法。仿真计算比较结果表明文中建立的弹道滤波算法对弹道类目标的滤波精度和反应时间上有大幅度提高。     

消防联合执法工作中存在的问题及对策

阐述了当前消防联合执法的形式、作用和背景,深入分析了消防联合执法工作中存在的执法主体职责不明确、执法依据不准确、执法程序不合法、执法协调工作不到位等问题和不足,并从依法治理和长效管理的角度提出了明确执法权限、落实执法责任、严格按照法定程序开展消防联合执法活动、积极探索长效管理机制等进一步改进和完善消防联合执法的思路和措施。     

Joint pricing,assortment, and inventory decisions for a retailer's product line

Consider a set of product variants that are differentiated by some secondary attributes such as flavor, color, or size. The retailer's problem is to jointly determine the set of variants to include in her product line (“assortment”), together with their prices and inventory levels, so as to maximize her expected profit. We model the consumer choice process using a multinomial logit choice model and consider a newsvendor type inventory setting. We derive the structure of the optimal assortment for some important special cases, including the case of horizontally differentiated items, and propose a dominance relationship for the general case that simplifies the search for an optimal assortment. We also discuss structural properties of the optimal prices. Finally, motivated by our analytical results, we propose a heuristic solution procedure, which is shown to be quite effective through a numerical study. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007