基于GIS的矿区土地复垦辅助信息系统

为满足矿区土地复垦方案编制的实际需要,提高矿区土地复垦的信息化水平,重点解决土地损毁预测、土地复垦适宜性评价、工程量计算和土地复垦相关图件制作等问题,应用GIS、RS和三维数据可视化等技术,实现矿区土地复垦辅助信息系统的设计与开发;借助ArcGIS Engine、Visual Studio 2008、ENVI/IDL,将GIS、RS、数学模型和空间数据库等技术相结合,构建了具有较强科学性和通用性,集土地损毁预测、土地复垦评价、规划、监督检查等功能于一体的矿区土地复垦辅助信息系统;通过构建矿区土地复垦辅助信息系统,有助于提高规划的效率和科学性,为我国矿区土地复垦的信息化提供借鉴和参考。     

点云密度对地面三维激光扫描精度及沉陷参数的影响

根据平面分辨率的理论公式,推导地面三维激光扫描仪不同距离处的立面及平面相邻点间隔（即点云分辨率）计算公式,并得到了平面某一距离处平面单位面积的点云数的计算公式;通过试验分析点云分辨率对点位精度及测距精度的影响;通过对某矿沉陷观测的点云数据按照不同的分辨率进行重采样并进行求参,得到不同分辨率下参数的变化情况,经对比分析,得到最佳的点云分辨率设置标准为300 mm/100 m。     

基于ANSYS/fe-safe的修造船用高空作业车伸缩臂疲劳寿命分析

介绍了一种以名义应力法为基础,对疲劳寿命进行计算的方法,并应用有限元分析软件ANSYS建立了高空作业车伸缩臂有限元模型,提出了用一种基于ANSYS/fe-safe疲劳分析软件来预测分析修造船用高空作业车疲劳寿命的方法.     

Proton beam writing and electroplating for the fabrication of high aspect ratio Au microstructures

We present an approach to fabricate tall high aspect ratio Au microstructures by means of proton beam direct writing. Combining proton beam direct writing and electroplating, we successfully produced gold structures with sub-micrometer lateral dimensions, structure heights in excess of 11 μm, and aspect ratios over 28. Sidewall quality of the Au structures was improved by lowering the process temperature to 20 °C when developing PMMA patterns with GG developer. The application of such structures as X-ray masks for deep X-ray lithography with synchrotron radiation was demonstrated.     

Development of elastomeric lab-on-a-chip devices through Proton Beam Writing (PBW) based fabrication strategies

In recent years, one of the most exciting developments in fluidic device applications is the rapid evolution of miniaturized micro- and nanofluidic systems, the so called “lab-on-a-chip” devices. These devices integrate laboratory functions into a single chip, and are capable of various biochemical analysis and synthesis, such as sample injection and preparation, single cell/molecule observation, bioparticle sequencing and sorting etc. The evolvement of lab-on-a-chip concept implies the use of novel fabrication techniques for the construction of versatile analytical components in a fast and reproducible manner. Endowed with unique three-dimensional fabrication abilities, Proton Beam Writing (PBW) [1], which is capable of producing nanometer scaled fluidic structures with smooth and straight side wall features, has a great potential to develop all sorts of polymer fluidic devices.In this paper, we describe the batch fabrication of Poly-dimethysiloxane (PDMS) elastomeric lab-on-a-chip devices utilizing PBW technique. A series of fabrication processes, involving PBW, nickel electroplating, soft lithography, polymer dynamic coating and hydrophilic treating, were modified and adopted in our work. Subsequent characterization of individual categories of channel devices was carried out for specific fluidic studies. Respective experimental procedures are presented and results are explained. The channel devices demonstrated good fluidic performance and functionality, suggesting their further application in more complex biological investigations, and the versatility of PBW in lab-on-a-chip development.     

中子时空动力学直接模拟方法研究与程序研制

直接模拟方法(DSM)是一种新的用于求解三维瞬态中子输运问题的方法.该方法通过直接模拟瞬态过程中系统内中子和缓发中子先驱核的动态行为来求解核反应堆动力学问题.由于该方法取消了现有方法的各种近似,具有普适通用性.本文在详细研究该方法的基础上,开发了相应的瞬态分析程序TMCC,并进行了算例的验证.     

某轻型车辆液力减震器活塞杆断裂失效分析

对发生断裂失效的某型轻型车辆液力减震器活塞杆进行断口失效分析。为查找失效原因对活塞杆根部的加工状态进行分析,同时对活塞杆根部有无过渡圆角的两种情况进行有限元应力分析。结果表明,活塞杆的断裂属于高周疲劳断裂,引起早期疲劳断裂失效的主要原因是因为活塞杆根部过渡截面未加工过渡圆角所造成的。与未加工过渡圆角时相比,加工有R5的过渡圆时可以使活塞杆根部的最大轴向应力下降36%。     

FFT比相测距雷达中的相差—距离关系研究

连续波比相测距雷达具有结构简单、测距精度高、便于采用现代数字信号处理技术等优点。但其相差-距离精确关系尚未见有正式文献豫剧是以报导,本文深入探讨了在采用FFT法求相的情况下,连续波又频比相测距雷达中的相关-距离的精确关系。从而为此种雷达的深入研究提供了一个重要的理论基础。     

湖南师大附中艺术演播厅扩声设计介绍

对湖南师大附中艺术演播厅中电声系统的设计思路、设备选型与组套做了说明,总结出此类演播厅电声设计的一般设计方法,保证预期的使用效果和最经济的资金投入,希望对读者具有借鉴作用。     

剥离法制备少层石墨烯及其应用进展

石墨烯因结构特殊,具有优异的物理化学性能,近年被广泛应用到电子、能源、材料和医疗等领域,被誉为“新材料之王”。目前,关于石墨烯的制备方法日益多样化,其中化学合成法制备的石墨烯缺陷较大,而通过剥离法制备的石墨烯本征性能更优,应用更为广泛。综述了几种剥离制备少层石墨烯的方法,分析和总结了各种剥离法的优缺点,并探讨了剥离石墨烯在诸多行业领域的技术应用及发展现状,同时对石墨烯未来技术应用进行了展望。