数字化可编程直接序列扩频(DP-DS/SS)系统的设计

本文介绍了一种数字化可编程直接序列扩频(DP-DS/SS)系统的设计方案,借鉴了软件无线电的思想,基于FPGA DSP的结构实现数字化可编程功能,采用动态配置技术实现多模式工作。一些关键技术的研究使系统具有较强的适应性,部分应用结果表明该系统可以很好地应用于移动卫星通信和直扩抗干扰通信。     

基于微波固定业务系统的个人通信互扰分析

本文阐述了利用微波固定业务系统实现个人通信的基本原理，建立了该系统的数学模型，得到了个人通信网（ＰＣＮ）的一般特性，比较严格地分析了个人通信网与微波系统之间的互相影响。虽然以下考查的只是单微波系统，但很容易扩展到具有两个或多个微波系统的情况。     

综合交通客运枢纽乘客服务设施系统优化方法

为消除综合交通客运枢纽内乘客拥挤、踩踏等安全隐患，提出基于稳定性的综合交通客运枢纽乘客服务设施系统优化方法，为提高综合交通客运枢纽运营效率、优化枢纽的乘客服务设施系统配置、提高安全运营管理等提供应用基础理论支撑。综述相关领域的研究进展．以乘客和服务设施构成的系统为研究对象，从排队网络的视角出发。提出乘客聚集状态变化分析方法和适应乘客聚集状态变化的乘客服务设施系统配置方案。     

直扩信号检测与估计的改进

对低信噪比下直接序列扩频(DS／SS)信号的检测和估计提出了一种新的改进思路。在通常数值处理前加设一预处理模块，该模块能改善白噪声背景下信号的信噪比，从而为进一步提高低信噪比信号检测与估计的能力给出了一条新的途径。     

An integrated production–distribution model for the dynamic location and allocation problem with safety stock optimization

The design and management of a multi-stage production–distribution system is one of the most critical problems in logistics and in facility management. Companies need to be able to evaluate and design different configurations for their logistic networks as quickly as possible. This means coordinating the entire supply chain effectively in order to minimize costs and simultaneously optimize facilities location, the allocation of customer demand to production/distribution centers, the inbound and outbound transportation activities, the product flows between production and/or warehousing facilities, the reverse logistics activities, etc.Full optimization of supply chain is achieved by integrating strategic, tactical, and operational decision-making in terms of the design, management, and control of activities. The cost-based and mixed-integer programming model presented in this study has been developed to support management in making the following decisions: the number of facilities (e.g. warehousing systems, distribution centers), the choice of their locations and the assignment of customer demand to them, and also incorporate tactical decisions regarding inventory control, production rates, and service-level determination in a stochastic environment. This paper presents an original model for the dynamic location–allocation problem with control of customer service level and safety stock optimization. An experimental analysis identifies the most critical factors affecting the logistics cost, and to finish, an industrial application is illustrated demonstrating the effectiveness of the proposed optimization approach.     

基于偏离-份额分析法的京津冀制造业竞争力分析

京津冀作为一个整体区域,其制造业总体上具有如下特点:北京在高新技术产业具有明显的竞争优势,但制造业的总体竞争力却很低,天津制造业竞争力优势明显,河北制造业结构则更加合理,总之,它们的总体竞争力都很强大.针对京津冀制造业各自的优势和劣势,应增强合作取长补短,促进各地和整体制造业迅速发展.     

Densadeg工艺投加药方式的优化研究

Densadeg工艺是目前欧美地区运用较广泛的化学强化一级处理工艺.选取SS为控制因子,对法国威尔弗朗士污水处理厂Densadeg的氯化铁投加方式进行前馈控制优化实验.经过优化后的Densadeg处理效果更好,化学药剂的利用更趋于合理,自动化程度更高.     

曝气生物滤池处理居住小区低温污水的研究

本文从工程的角度对曝气生物滤池处理居住小区污水效果进行研究,考察了曝气生物滤池对SS、CODCr、NH4+-N的去除率及运行参数和环境因素的影响。