某铀矿井安全监视系统

系统地介绍了某铀矿井安全监视系统的组成、布置、安装和基本功能及取得的效果。     

铀地浸环保技术与对策

本文根据地浸工艺产生的污染源项及特点，重点论述了地浸工艺的地下水复原技术以及采取的相应环境保护对策。     

复杂山地大气环境三维建模与仿真方法

本文主要探讨复杂山地大气环境三维建模与数值仿真方法,介绍了三维数值地形图的概念及其表示方法,建立了相应的数据文件格式。针对某铀矿井尾气扩散实际问题创建了相应仿真模型,进行了仿真计算,并把仿真结果与实验结果进行了对比。从网格划分和仿真计算结果来看,证明这种方法简单且实用。     

主动配电网状态估计技术评述

间隙性分布式电源高渗透率并网,电动汽车、储能系统等可控负荷及高级量测装置的规模化接入使得主动配电网状态估计在结果精度要求、计算效率等方面面临诸多全新挑战。首先,简要阐述了国内外有关传统配电网状态估计技术前期的研究成果;然后,较为全面地梳理了主动配电网状态估计技术的国内外研究现状,包括新型伪量测的合理建模、状态估计算法的高效改进及量测装置的优化配置等研究方面;最后,对该领域未来进一步发展所面临的关键问题进行了探讨和分析。     

基于柱坐标系的充型与凝固模拟系统的开发

针对铸造中大量遇到的回转类铸件，开发出基于柱坐标系的充型与凝固模拟软件系统。该系统有效地解决了基于直角坐标系的模拟软件在处理回转类铸件，尤其是薄壁铸件时遇到的网格剖分结果不对称，模拟结果局部失真等问题。初步的充型与凝固模拟结果表明，该系统的开发为解决回转类铸件，尤其是薄壁铸件时遇到的网格剖分结果不对称，模拟结果局部失真等问题提供了一种更加合适的方法。     

褐煤炉渣生产免蒸免烧砖试验研究

以内蒙古赤峰市第二毛纺厂排出的褐煤炉渣为主要原料，研制生产免蒸免烧砖，试验通过５０多组、成型了４５０ 多块试件，对该种砖的抗压性能、抗折性能及抗冻性能进行了测试，同时对所用原材料进行了物理和化学成份测试，重点研究了不同加压情况下、多组配合比时砖的抗压强度，同时研究了外加剂的作用及最佳掺量，通过正交试验最终研制出经济技术合理，生产抗压强度为１０ ＭＰａ 以上，与普通粘土砖物理力学性能相当的，具有明显的节能、利废效果的非烧结免蒸粉煤灰砖的配合比和生产工艺，为大批量生产提供技术保障。     

Characterizing the synchronizability of small-world dynamical networks

Many real-world complex networks display a small-world feature-a high degree of clustering and a small average distance. We show that the maximum synchronizability of a network is completely determined by its associated feedback system, which has a precise meaning in terms of synchronous communication. We introduce a new concept of synchronizability matrix to characterize the maximum synchronizability of a network. Several new concepts, such as sensitive edge and robust edge, are proposed for analyzing the robustness and fragility of synchronization of a network. Using the knowledge of synchronizability, we can purposefully increase the robustness of the network synchronization and prevent it from attacks. Some applications in small-world networks are also discussed briefly.     

低压铸造铝合金轮毂充型模拟实用研究

根据低压铸造圆盘类铸件的充型特点 ,设计开发了一套简化充型模拟软件 ,应用于低压铸造铝合金轮毂铸件的充型模拟。模拟结果与采用SOLA VOF算法的模拟结果进行对比表明 ,充型过程及铸件温度分布合理 ,实现了为后续凝固模拟提供准确的初始温度场的设计目标。该简化算法运算时间短 ,可以满足实际应用中对运算时间的要求     

低压铸造凝固模拟中时间步长的实用算法

针对低压铸造凝固模拟计算过程中存在的收敛性问题，提出了一种能够处理复杂边界条件的简单算法，准确地给出了临界时间步长，避免了计算发散的现象，同时减少了计算的工作量。     

Study on Numerical Simulation of Mold Filling and Solidification Processes under Pressure Conditions

The mold filling and solidification simulation for the high pressure die casting (HPDC) and low pressure die casting (LPDC) processes were studied.A mathematical model considering the turbulent flow and heat transfer phenomenon during the HPDC process has been established and paralled computation technique was used for the mold filling simulation of the process.The laminar flow characteristics of the LPDC process were studied and a simplified model for the mold filling process of wheel castings has been developed.For the solidification simulation under pressure conditions,the cyclic characteristics and the complicated boundary conditions were considered and techniques to improve the computational efficiency are discussed.A new criterion for predicting shrinkage porosity of Al alloy under low pressure condition has been developed in the solidification simulation process.