基于广义Hoek-Brown准则的节理岩体力学参数折剪计算

节理化岩体力学参数是矿山工程地质和稳定性分析的重要基础数据,一般在实验室通过单轴、三轴试验只能得到岩石的力学参数,无法得到岩体的力学参数。目前,利用岩石力学参数确定岩体力学参数的方法较多,但都过于烦琐或准确度不高,急需一种新的简易确定方法。因此,通过利用基于广义Hoek-Brown准则的地质强度指标（GSI法）,并结合相应的岩土分析软件,强度折剪岩石力学参数值,从而得到岩体的力学参数。通过将该方法应用于赤峰中色白音诺尔矿业有限公司岩体力学参数的计算中,证明采用该方法考虑岩体的结构面和完整性,可较为准确地反映节理化岩体的力学特性,且方便可行,具有工程实用价值。?     

浅谈新形势下如何提高航道的竞争力

自2009-01-01起实行税费改革后,我国又推出了事业单位机构改革。面对改革后的严峻形势,作为航道管理部门,航道部门又该如何提升自身的竞争力？     

复合泡沫塑料的性能改进研究

为改善复合泡沫塑料的介电性能,采用金属氧化物粒子填充改性双马来酰亚胺空芯玻璃微球复合泡沫塑料得到了高介电常数、低介质损耗因数、低密度、力学性能良好的电介质材料。     

When smart grid meets PHEVs: a smart load distribution mechanism in smart grid

Along with the increasing popularity of electric vehicles caused by economic and environmental incentives, the penetration of plug-in hybrid electric vehicles (PHEVs) poses a great threat to the power grid, especially to the aggregated load in the power system. Motivated by this observation, in this paper, we analyze the impact of large-scale usage of PHEVs and address the load distribution problem by solving a decentralized optimization problem and smoothening the peak load with pricing strategies in the power grid. We also investigate the influence of charging time and charging mode on load distribution, as the charging price varies with the changes of these two factors. Our simulation study on PJM’s data warehouse shows that the proposed strategies can well smooth the peak load by pricing on the charging time and mode. The results also indicate that our strategies always distribute the load in a smoother manner at a smaller load fluctuation compared with other schemes (e.g., First Come First Service and PMCS) and thus improving the stability and reliability of the power grid.     

浅析中国本土戏曲角色与动画角色的融合

20世纪申后期,中国有很多经典的极富艺术魅力的动画角色一直印在我们的脑海中。像美猴王、葫芦娃、九色鹿、神笔马良、阿凡提等,角色造型风格各异。让人印象深刻。而如今大量动画作品在风格上跟风日美的痕迹,国产动画一定程度上失去了自己原有的民族性风格。进入新世纪。动画创作者开始尝试一些新的艺术手段来创作动画．而中国的传统戏曲具有独特的东方审美价值和艺术魅力,时值今日,动画工作者们一直都在尝试使用各种各样的艺术方式来进行动画创作。中国的戏曲文化博大精深。我们生活在这样一个文化氛围中。创作出具有本土文化特色的戏曲动画和塑造中国戏曲动画角色是万众期待的。     

基于ITSS的故障智能诊断和处理系统的设计

如何以标准化的方式实施IT运维以提升运维服务的效率,对流程进行规范,是当前我国IT服务管理面临的迫切问题.文主要针对信息系统运维业务需求进行了分析,对支持ITSS的智能诊断和自动处理系统的开发和设计进行了详细阐述,以提高系统的运行稳定性.     

Effects of the reinforcement and toughening of acrylate resin/CaCO3 nanoparticles on rigid poly(vinyl chloride)

Novel composite particles based on nanoscale calcium carbonate (nano‐CaCO₃) as the core and polyacrylates as the shell were first synthesized by in situ encapsulating emulsion polymerization in the presence of the fresh slush pulp of calcium carbonate (CaCO₃) nanoparticles. Subsequently, these modified nanoparticles were compounded with rigid poly(vinyl chloride) (RPVC) to prepare RPVC/CaCO₃ nanocomposites. At the same time, the effects of the reinforcement and toughening of these modified nanoparticles on RPVC were investigated, and the synergistic effect of modified nanoparticles with chlorinated polyethylene (CPE) was also studied. The results showed that in the presence of nano‐CaCO₃ particles, the in situ emulsion polymerization of acrylates was carried out smoothly, and polyacrylates successfully encapsulated on the surface of nano‐CaCO₃ to prepare the modified nanoparticles, breaking down nano‐CaCO₃ particle agglomerates, improving their dispersion in the matrix, and also increasing the particle–matrix interfacial adhesion. Thus, the effects of the reinforcement and toughening of these modified nanoparticles on RPVC were very significant, and the cooperative effect of the nanoparticles with CPE occurred in the united modification system. Scanning electron microscopy analyses indicated that large‐fiber drawing and network morphologies coexisted in the system of joint modification of nanoparticles with CPE. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3940–3949, 2007     

计算机远程控制的有关应用分析

通过远程控制软件介绍计算机远程控制的关键技术。在计算机普及速度加快的今天,计算机远程技术得到迅猛发展,研究计算机远程控制的应用,推动其推广和应用。本文论述计算机远程控制的应用,旨在为同行提供一些参考。     

STM32和OV2640的嵌入式图像采集系统设计

基于STM32嵌入式系统及200万摄像头OV2640设计了图像采集系统,分析了系统的基本硬件架构,分别对不同模块的功能特点作出了简单的介绍;对系统的软件设计给出了详细的说明,介绍了系统初始化的基本思路和流程,以及相关外围设备模块在程序中的使用;并给出了系统的整体设计思路,实现了系统的稳定运行。     

Visual experience for autostereoscopic 3D projection display

In order to investigate visual experience for watching the autostereoscopic three‐dimensional (3D) projection display, we conduct a subjective evaluation experiment by a questionnaire when viewing video clips. Factor analysis is adopted to classify the evaluation items for the perpetual constructs of visual experience. Then a mixed design with repeated measurement analysis of variance with dimension and display duration as factors is carried out on the evaluation data to check the factorial effects and interactions for statistical significance. The results of factor analysis extract five factors including visual comfort, image quality, distortion, naturalness, and presence, which can be used as comprehensive indicators to evaluate the autostereoscopic 3D projection display. The results of analysis of variance indicate that image quality, which is used to assess two‐dimensional contents, is no longer applicable. It is necessary to give consideration to depth when evaluating 3D visual experience. Although 3D scenes enhance the overall subjective performance such as naturalness and presence, the health issues and stereoscopic distortion related to the introduction of depth cannot be ignored.