推进中国网通创新转型之我见

本文从观念转变、网络建设、市场调研、人力资源开发、四个环节阐述了如何推进中国网通创新转型。     

Adaptive traffic signal control using approximate dynamic programming

This paper presents a study on an adaptive traffic signal controller for real-time operation. The controller aims for three operational objectives: dynamic allocation of green time, automatic adjustment to control parameters, and fast revision of signal plans. The control algorithm is built on approximate dynamic programming (ADP). This approach substantially reduces computational burden by using an approximation to the value function of the dynamic programming and reinforcement learning to update the approximation. We investigate temporal-difference learning and perturbation learning as specific learning techniques for the ADP approach. We find in computer simulation that the ADP controllers achieve substantial reduction in vehicle delays in comparison with optimised fixed-time plans. Our results show that substantial benefits can be gained by increasing the frequency at which the signal plans are revised, which can be achieved conveniently using the ADP approach.     

探讨新、旧城区的房地产开发投资

随着经济的发展,城市的建设速度越来越快,就其房地产开发投资而言,新城、旧城因其不同的地理位置、自然环境、人口环境和文化环境而各有优劣,两城区的优点和劣势也将影响和改变房地产开发的投资方面,文章将从以下几个方面进行探讨。     

ATCEM: a synthetic model for evaluating air traffic complexity

Air traffic complexity, which measures the disorder of air traffic distribution, has become the critical indicator to reflect air traffic controller workload in air traffic management (ATM) system. However, it is hard to assess the system accurately because there are too many correlated factors, which make the air traffic complexity nonlinear. This paper presents an air traffic complexity evaluation model with integrated classification using computational intelligence (ATCEM). To avoid redundant factors, critical factors contributing to complexity are analyzed and selected from numerous factors in the ATCEM. Subsequently, to construct the mapping relationship between selected factors and air traffic complexity, an integrated classifier is built in ATCEM. With efficient training and learning based on aviation domain knowledge, the integrated classifier can effectively and stably reflect the mapping relationship between selected factors and the category of air traffic complexity to ensure the precision of the evaluation. Empirical studies using real data of the southwest airspace of China show that the ATCEM outperforms a number of state‐of‐the‐art models. Moreover, using the critical complexity factors selected in ATCEM, the air traffic complexity could be effectively estimated. Copyright © 2015 John Wiley & Sons, Ltd.     

The Computer Simulation System for Range Distribution of various Implantat

IntroductionIonimPlanation,whichhasbeenestablishedasanimptwdopingmethodintosemiconductoratfluenceslowerthanl0I6ions/Cm2andWhichisanindispensabletechnologyinlnyescaleintegration(LSI)manufcturing,haslat0lyattractedconsiderableattentionasasdsemodificationProcessforvariousmaterials,pwhcularlyformetals.HighfiuenceimPlanationofreactiveionsintomatCrialsleadstothefOrmationofchemicalcompoundsandmetastablephase,suchasAlNandTffowhichhaveultrahighhardnessandgoodresistanccagainstwearresulhnginthegreat…     

阻隔碳渣延长缸套的使用寿命

运转中的船用大型二冲程低速柴油机,由于结构的原因,容易发生活塞环和缸套异常磨损,文章提出改进扫气箱内部结构的设想,对于延长缸套和活塞环的使用寿命,有一定的实用价值和良好前景。     

中小型制造企业物流业务外包的风险控制探讨

随着物流的迅速发展,根据中小型制造企业的特点,物流业务外包是一个比较好的选择,但外包过程中风险无处不在,本文重点研究了事前、事中和事后的风险控制。     

空间环境因素对VLF通信系统性能的影响

VLF通信是远距离、稳定的对潜通信方式。找出了两种影响通信质量的空间因素——大气波导和大气噪声，分析了大气波导对信号场强的影响，以及大气噪声对接收机误码性能的影响，指出了提高VLF通信质量的方法。     

电力机车转向架车轴疲劳可靠性设计方法

以ＳＳ７Ｂ型电力机车转向架车轴为研究对象，研究了疲劳可靠性设计方法在电力机车转向架车轴上的适用性和可行性。首先应用了有限元分析软件计算了车轴的应力场，确定了关键部位。     

对新时期轻型水面舰船发展的思考

轻型水面舰船曾在众多海战中发挥了举足轻重的作用，但在“能量”制胜情况下，大型的多功能的舰船优势明显，轻型舰艇的不足凸显，其地位和作用逐渐削弱。然而信息技术的发展，实现了单平台作战向多平台联合作战的转变，“信息”将成为决定战争胜利的决定因素。本文分析了信息化条件下作战样式以及战场环境新特点，提出了我国轻型水面舰船发展的思考。