金川镍矿机械化开采新进展

金川镍矿近年来在原有下向胶结充填采矿法开采的基础上，对开采工艺、充填工艺、机械设备管理、劳动组织、工资制度等方面进行了全面改革，因而使机械化开来比普通（电耙）法开采，取得了令人瞩目的经济效益。目前金川镍矿已经大力扩大机械化开采应用范围。     

金川镍矿的斜坡道工程

金川镍矿通过8年的试验和生产实践,对斜坡道工程的施工、应用已有丰富的经验,本文对主斜坡道、副斜坡道、分斜坡道的方案、布置方法、断面、坡度、曲率半径、道路铺设、红外信号系统的确定都作了具体介绍。     

建筑漫步——从空间运动的角度解读柯布西耶

本文通过对萨伏依别墅的空间运动分析,剖析柯布西耶对于＂建筑漫步＂的现代主义构想,对系统中最为重要的坡道元素进行深入探讨,从空间运动的角度解读柯布西耶。     

地下矿山斜坡道三维模型参数化构建方法研究

针对地下矿山斜坡道建模技术不完善且在矿山的应用程度低的问题,基于参数化思想开展了地下矿山斜坡道三维建模方法研究。首先,根据斜坡道断面参数,构建斜坡道断面的二维轮廓线;其次,根据斜坡道路径参数,经系列坐标转换得到斜坡道断面的三维轮廓线;再次,采用连续断面的侧面构建算法快速建立斜坡道三维模型;最后,将斜坡道的模型参数存贮于相应模型的数据结构中,以便于计算其工程数据和检索、查询、动态修正模型参数。借助该方法和HOOPS组件,运用VC++工具,开发了一个地下矿山斜坡道参数化建模系统。基于该系统并根据某矿山地下斜坡道的路径平面图、斜坡道坡度和断面参数信息,成功构建了斜坡道的三维参数化模型,并能根据矿山施工进展动态修正模型。     

红透山铜矿深部斜坡道围岩发生层裂破坏数值分析

本文围绕红透山矿红透山矿深部-707m水平13#采场斜坡道围岩层裂破坏,通过现场工程地质调查、岩石力学实验、围岩应力分析,对13#采场斜坡道的围岩质量进行分析及岩体力学参数估算;在此基础上,应用FLAC3D分析回采对斜坡道围岩层裂破坏影响,开采矿体围岩在切向应力作用下,岩体微裂纹沿切向应力方向扩展、贯通,形成平行于开挖边界的宏观裂缝;数值分析采动过程斜坡道围岩层裂发生力学机制及其围岩应力场变化规律,数值模拟结果表明,深部斜坡道围岩高应力、采动应力以及爆破震动共同作用造成岩体产生层裂破坏。     

Multi-agent based traffic simulation and integrated control of freeway corridors: Part 2 integrated control optimization

This research aims to optimize the traffic signal cycle and the green light time per traffic signal cycle at ramps and intersections in arterials to maximize the passing traffic volume and minimize the delaying traffic volume in freeway corridors. For this purpose, we developed the MATDYMO (multi-agent for traffic simulation with vehicle dynamics model) and validated it with comparison to commercial software, TRANSYT-7F, for an interrupted flow model and to URFSIM (urban freeway traffic simulation model) for an uninterrupted flow model. These comparisons showed that MATDYMO is able to estimate the traffic situation with only incoming traffic volume. Using MATDYMO, ramp metering and traffic signal control can be optimized simultaneously. We extracted 80 sampling points from the DOE (Design of Experiment) and derived each response from MATDYMO. Then, a neural network was adopted to approximate the objective function, and simulated annealing was used as an optimization method. There are three cases of the objective function: maximization of the freeway traffic volume, minimization of the delay of ramps and arterials, and the satisfaction of both cases. The optimization results showed that traffic flow in freeway corridors can be maintained to a steady stream by ramp metering and signal control. This paper was recommended for publication in revised form by Associate Editor Kyongsu Yi Myung-Won Suh is a professor of Mechanical Engineering. During 1986–1988, he worked in Ford motor company as researcher. During 1989–1995, he worked in technical center of KIA motors. He took a BS Degree in Mechanical Engineering from Seoul National University and an MS Degree in Mechanical Engineering from KAIST, South Korea. He obtained his Doctorate at University of Michigan, USA, in 1989. His research areas include the structure and system optimization, advanced safety vehicle and reliability analysis & optimization. Chul-Ho Bae is a PhD candidate at Sungkyunkwan University in Suwon, South Korea. He accomplished fellowship work as researcher at Mississippi State University, USA, in 2003 and 2005. He worked in Institute of Advanced Machinery and Technology (IMAT) as a Research Assistant in 2004. He was a part time Lecturer in computer aided Mechanical Engineering of Ansan College of Technology, Suwon Science College, and Osan College during 2004–2005. He took a BS Degree in Mechanical Design and an MS Degree in Mechanical Engineering from the Sungkyunkwan University. His research interests include computer aided engineering, reliability engineering, and optimization.     

Sub-critical reactor kinetics analysis using incomplete gamma functions and binomial expansions

Point reactor kinetics equations with one group of delayed neutrons are solved analytically to determine the neutron population as a function of time for any ramp reactivity insertion in the presence of external neutron source using prompt jump approximation. With the time dependent neutron population the other important kinetic parameters such as the reactor period also can be derived. Analytical solutions are available in the literatures for any ramp reactivity insertion into a critical reactor without considering the source term. Analytical solutions available in the literature by considering the source term also to study sub-critical reactor kinetics. But such a solutions either uses constant source approximation which under predicts the solution, or the available solution is not useful for all kind of sub-critical reactivity and external ramp reactivity insertion combination due to the computer precision incompatibility. In the present work, analyses are carried out to determine the reactivity boundary to which the existing results can converge to a true solution, beyond where the precision incompatibility arises. A new series solution is recommended in the region where existing solution converges to false solution due to precision incompatibility.     

城市快速路网匝道与污染控制双层多目标规划模型

基于环境容量和交通容量,建立了一个双层多目标规划模型描述城市快速道路网的污染控制与匝道控制,并考虑了用户的路径选择行为．设计了基于改进遗传算法的启发式求解算法。该算法借助不可微精确罚函数将约束问题转化为单个无约束问题来解决,采用混合杂交和间歇变异提高算法的搜索能力．最后。通过算例说明该模型及算法的有效性．     

斜坡海涂上修建海堤的爆炸挤淤施工技术

采用爆炸挤淤置换法在较陡的斜坡海涂上修筑海堤,因堤身内外侧涂面高差大,施工过程中抛填堤身容易滑塌。最初在浙江舟山某海堤工程中遇到了这个难题。通过对堤身稳定性的计算分析,将堤身抛填方法调整为"内侧突前、外侧迟后",炸药布置侧重于内侧。既保证了施工期抛填堤身的稳定,又使得爆炸处理后形成的堤身断面满足设计要求。此后该方法又在多条类似海堤的施工中得到成功的应用,由此总结出了在斜坡海涂上修建海堤的爆炸挤淤技术,并申报了发明专利(201510908384.1)。     

露天矿卡车移动坑线优化的一种方法

为了使应用计算机编制露天矿开采进度计划时采用的运输距离更符合实际,本文提出了一种卡车移动坑线优化布置的方法。