技术图解中人为因素浅析

手册是航空公司运营和维修飞机的法规性文件,技术图解作为其中不可或缺的一部分。该文对影响技术图解适用性的人为因素进行了分析,并给出了相应的建议。

基于图解技术的“园林设计”课程教学改革——以北京林业大学为例

“园林设计”课程是北京林业大学风景园林和园林专业的核心课程之一,经过60多年的发展建设,已形成较为完善的教学体系。随着北京林业大学“一流学科”建设的推进和国际风景园林学科的深入发展,为进一步拓展学生的视野,培养他们系统分析问题和解决问题的能力,在原有课程教学体系的基础上,打破了传统教学限制,引入图解概念和相关理论,对课程教学进行了改革探索:首先,增加了与图解技术相适应的教学内容;其次,以案例分析的形式讲授图解技术;最后,基于图解技术,按照“场地-策略-设计-技术”4个流程展开课程教学,突出图解技术在各阶段的运用。教学实践证明,改革后的“园林设计”课程教学获得大部分学生的认可,促进了课程教学质量的提高,激发了学生学习的兴趣。

计算机技术对电视体育转播的影响探析

随着计算机技术的高速发展,计算机给人们带来了无限的可能,它给传统电视体育转播带来的不仅仅是视觉的体验,而且促使体育节目的制作产生了翻天覆地的变化。电视作为老一代节目的主要媒介,应与现代的计算机技术相融合,这样就能够大幅度提升体育节目的技术解说和栏目质量。同时全面实行计算机技术在电视体育转播上的应用,对电视行业的经济效益也有着积极的影响。如今好的体育节目往往离不开计算机技术的合理运用,这已经成为电视行业所讨论的话题。本文简要的分析了计算机技术在电视体育转播的应用,然后解释了计算机技术在电视体育转播的作用,最后为计算机在电视转播方面提供了一些建议。

项目风险识别技术

风险识别的基础是历史数据、经验和洞察力。因此，本文针对三者反映风险能力和程度的不同，提出了根据风险因素的来源和其信息的可获得性、不确定性，风险识别的技术方法有文件审查（项目档案、财务报表）、广泛的信息搜集技术、核对表、假设检验法、图解技术。

基于GERT随机网络的城市交通流仿真研究

针对传统城市交通流模型仅适用于非拥挤城市交通路网规划,无法拟合路段行驶时间依赖于交通负荷变化的城市交通流时空分布网络问题的缺陷,运用GERT随机网络对城市交通流进行仿真模拟.将普通动态交通规划模型无法反映的各路径交通流之间相互影响的内在逻辑关系考虑在内,使得动态交通规划更具现实指导意义.对贵阳喷水池交通枢纽路段的实际案例分析表明,该方法可以为城市交通规划提供有力地决策支持.

基于GSPN的GERTS仿真模型研究

在分析维修设备保障流程建模与仿真重要性的基础上,分析了GERTS模型和广义Petri网(GSPN)模型在流程仿真中的应用特点,提出了基于嵌入式广义Petri资源约束网的GERTS仿真模型,并给出了具体的仿真算法。嵌入GSPN约束网的GERTS仿真模型,解决了GERTS难以对具有较强资源依赖性的过程很好描述的缺陷,可用于大型设备维修流程的仿真建模分析。最后,文章针对某部队对武器装备保障流程进行了建模和仿真实例分析,得出了资源配置的最优组合。并应用MATLAB对仿真结果进行了曲线拟合分析。

截拳道的封缠手法

目前，令人担忧的是，李小龙截拳道的封缠手法正在面临着失传的危险。现在，只有李小龙真正的弟子们向学员传授着这些技法，而其他大部分人在逐渐地忽略它。

海事卫星地面站RMS可用性评估模型

随着国际海事卫星通信系统(international maritime satellite communication system,INMARSAT)的不断发展,卫星地面站(satellite earth station,SES)的可用性评估具有重要意义。首先选取可靠性、维修性和保障性为指标,构建可靠性、维修性与保障性(reliability,maintainability and supportability,RMS)模型进行SES可用性评估;其次,以SES设备为研究对象,根据马尔可夫链得到设备有效性概率,并进一步推导出系统可靠性;然后,建立排队图解协调技术(queue-graphical evaluation and review technique,Q-GERT)网络以描述SES设备的维修保障过程,并基于AnyLogic软件进行建模仿真;最后,通过算例进行应用研究,基于RMS模型进行SES可用性评估,验证了该模型和评估方法的有效性与实用性。

Building Extraction from LIDAR Based Semantic Analysis

Extraction of buildings from LIDAR data has been an active research field in recent years. A scheme for building detection and reconstruction from LIDAR data is presented with an object-oriented method which is based on the buildings’ semantic rules. Two key steps are discussed: how to group the discrete LIDAR points into single objects and how to establish the buildings’ semantic rules. In the end, the buildings are reconstructed in 3D form and three common parametric building models (flat, gabled, hipped) are implemented.

Automatic Road Extraction Using Particle Filters from High Resolution Images

Road extraction plays an important role in many applications such as car navigation, but the manual extraction of roads is a laborious, tedious task. To speed the extraction of roads, an approach based on particle filtering to extract automatically roads from high resolution imagery is proposed. Particle filtering provides a statistical framework for propagating sample-based approximations of posterior distributions and has almost no restriction on the ingredients of the model. We integrate the similarity of grey value and the edge point distribution of roads into particle filtering to deal with complex scenes. To handle road appearance changes the tracking algorithm is allowed to update the road model during temporally stable image observations. A fully automatic initialization strategy is used. Experimental results show that the proposed approach is a promising and fully automatic method for extracting roads from images, even in the presence of occlusions.

Spin—Dependent Scattering Effects and Dimensional Crossover in a Quasi—Two—Dimensional Disordered Electron System

Two kinds of spin-dependent scattering effects (magnetic-impurity and spin-orbit scatterings) are investigated theoretically in a quasi-two-dimensional (quasi-2D) disordered electron system. By making use of the diagrammatic techniques in perturbation theory, we have calculated the dc conductivity and magnetoresistance due to weak-localization effects, the analytical expressions of them are obtained as functions of the interlayer hopping energy and the characteristic times: elastic, inelastic, magnetic and spin-orbit scattering times. The relevant dimensional crossover behavior from 3D to 2D with decreasing the interlayer coupling is discussed, and the condition for the crossover is shown to be dependent on the aforementioned scattering times. At low temperature there exists a spin-dependent-scattering-induced dimensional crossover in this system.

Path planning of the robot assembly based on Voronoi diagram

Based on the concepts of Voronoi diagram that describes geometry information of the robot assembly in C space, the position vector path parameter equation of the assembly movement between the step shaft and two-sided bearing bracket was given. And the path planning strategy of the component initiative assembly was put forward as well. Theoretical analysis proves that using the Voronoi diagram to do the geometry reasoning on the assembly space can evaluate the feasibility of the component assembly, and can present the reference position vector path of the component movement from the initial configuration to the objective configuration, therefore improves the flexibility of the robot initiative assembly.

门宏老师两部著作出版发行

我校门宏老师的最新2本专著《图解电工技术快速入门》、《图解电子技术快速入门（修订版）》，已分别于今年6月和8月由人民邮电出版社正式出版发行。

Challenges in Forensic DNA Profiling and Critical Issues in Interpretation of STR Profiles

Rapid advancements in forensic DNA technology has resulted in its increasing use to resolve crime cases, particularly in the detection of low-level DNA traces. This has been made possible by the increasing sensitivity of STR typing kits. Low-template DNA analysis requires careful consideration of the derived stochastic variations that lead to heterozygote imbalance, allele drop-out and increased detection of background contamination. The relevance of the evidence and the probative value of the DNA profile are important issues in the evaluation of forensic evidence.

现代大尺度建筑空间流动化的建构生成问题研究

大尺度建筑的空间流动化将异质空间体量以及空间的不同流线组合在一个系统之中并保持各要素的差异性。而基于空间的流动性所塑造的建筑形态通常表现为一种不规则变化的形态,对于生成这种形态的建构而言,必须符合某种规律,以便建立数学关系模型并依照某种逻辑进行演算以推导出最终的建筑形态。而操作性的图解技术在这种大尺度建筑复杂性形态的流动性空间的建构过程中,起着关键性的语法转译的作用。在概念构思阶段,图解技术从相关的领域获取创作的灵感,进而以新的思维模式去组织大尺度建筑中的功能与流线;在设计分析与表达阶段,图解技术使空间的流动性,可以被准确无误的表达出来,并利于下一步的分析思考;最后,在技术层面的问题解决过程中,图解技术有利于协调空间形态与结构形式之间所产生的矛盾,使空间的连续性成为真正可以开发的建筑要素。

Hamilton Graph Based on DNA Computing

DNA computing is a novel method for solving a class of intractable computational problem, in which the computing can grow exponentially with problem size. Up to now, many accomplishments have been achieved to improve its performance and increase its reliability. Hamilton Graph Problem has been solved by means of molecular biology techniques. A small graph was encoded in molecules of DNA, and the 'operations' of the computation were performed with standard protocols and enzymes. This work represents further evidence for the ability of DNA computing to solve NP-complete search problems.

Study on Technology for Quenching Catalytic Pyrolysis Gas

This article describes the application of technology for quenching catalytic pyrolysis gas at the Daqing commercial CPP test unit and the Shenyang commercial CPP production unit.On the basis of results for application of the Shenyang CPP unit this paper puts forward an improved process flow scheme for quenching the pyrolysis gas and made calculations using the process flowsheet software.Case Ⅰ of the process flow scheme,which is designed for full circulation of slurry,intends to use the pyrolysis light oil and fresh feed oil as the quenching media with the product slurry oil and fresh feedstock being discharged from the quench cooler bottom and routed directly to the reactor so that the fresh feed oil can be preheated prior to pyrolysis.Case Ⅱ of the process flow scheme intends to adopt recycle oil as the quenching medium with the product slurry and recycle oil being discharged from the quench cooler bottom to the fractionator,which then delivers the slurry from the bottom.These two cases for improving the process flow diagram can all effectively control the density and viscosity of the quenching medium to secure the smooth operation of quench cooler.

必杀技·气的要领

如果把“大眼”定义为四格以上的眼的话。可以说，大眼和小眼对杀，公气归眼大的一方所有。