对废塑料配煤炼焦产品产率的研究

通过在炼焦煤中添加不同种类、不同比例的废塑料，研究了所得焦炭的性质和焦化产品产率的变化。实验结果表明，焦油和焦炭的产率随着废塑料添加比例的增加而增大，粗苯和氨等产率变化不明显。     

砂控约束条件下的多参数协同建模

以构造特征、砂体展布、测井解释等研究为基础,建立Y井区的构造模型和砂泥岩相模型,进一步采用砂控约束条件下的多参数协同建模.建立了该井区储层孔、渗属性横型及油水分布模型.并结合储层四性关系确定的储层物性下限标准建立了有效储层模型.通过模型检验证明了砂控建模的合理性,为后继的油藏数值模拟及方案调整提供了良好的三维储层模型.     

对浮选过程中黄药浓度变化规律的研究

研制了由离子选择性电极（ISE）、XDI智能检测仪等组成的黄药浓度检测系统。时检测系统的性能作了较详细的研究；对浮选过程中黄药浓度进行了在线检测,研制系统检测结果与紫外分光光度法对照取得了较好的一致性,误差小于5％；探讨性研究了选矿过程中黄药浓度的变化规律。     

中国传统家具与现代家居环境

中国传统家具在现代家居环境中重新得到重视并正在复兴,本文在对中国传统家具的特性、室内陈设布局梳理的基础上,阐述传统家具在现代家居环境中的定位、使用与布局方式,并试图对一些设计原则进行探讨。     

井壁失稳风险的可靠度理论评价方法

国内外学者针对井壁稳定的问题已经开展了较为深入的研究,建立了多种经验模型、解析模型和数值模拟方法,但针对输入参数的不确定性及其对井壁稳定分析结果影响的研究则较少、认识尚不明确。为此,以井壁稳定力学解析模型为基础,结合可靠度理论下的一次二阶矩方法,建立了基于可靠度理论的井壁失稳风险评价方法,研究了不同钻井液当量密度下的井壁稳定可靠概率,并考察了参数不确定程度对井壁稳定分析结果的影响规律。研究结果表明:①井壁稳定输入参数的分布规律基本满足正态分布,变异系数越高,则样本数据的不确定性越强,对井壁稳定分析结果的影响将更加显著;②随着钻井液当量密度的增加,井壁垮塌的概率逐渐降低,但井壁被压漏的概率也逐渐增加,在井壁坍塌和破裂可靠概率曲线交点以下能够找到一个合适的安全窗口;③各地质因素不确定性对井眼稳定的影响顺序为:地应力孔隙压力岩石强度。结论认为,在井壁稳定分析中准确确定地应力的大小、降低其不确定程度的影响,可以提高井壁稳定评价的准确性。     

一种基于EPF滤波的三维单站无源定位算法研究

利用频率变化率、方位角及俯仰角信息,提出一种对固定辐射源的三维单站无源定位算法。该方法通过质点运动学原理,得出目标辐射源的位置,之后采用EPF滤波算法进行处理,对粗略定位结果进行修正和平滑,逐步估计出目标的位置。EPF（ExtendedParticleFilter）滤波是将EKF（ExtendedKalmanFilter）算法作为重要性函数的一种粒子滤波方法。仿真结果表明,基于EPF滤波的单站无源定位算法比传统的EKF滤波算法收敛更快、更稳定,滤波效果更好,定位精度更高,这对无源定位跟踪算法精度的提高和实际应用有很大的意义。     

Analysis of the effects of main design parameters variation on the vibration characteristics of a vehicle sub-frame

In the design process of an automobile part, several analysis methods are usually used to evaluate the performance of the part. However, most automobile design engineers do not directly use CAE (computer aided engineering) tools since specific skills are required to obtain practical results. Moreover, CAE requires a huge amount of computation time and cost. To resolve these problems, a new design approach, termed first order analysis (FOA), has been proposed. In this paper, the FOA technique is employed to design a vehicle sub-frame. An equivalent model of the vehicle subframe which only consists of beam elements is proposed and the modal properties obtained with the model are compared to those obtained with a full scale finite element model. The effects of some parameter variations on the modal characteristics of the vehicle sub-frame are investigated by employing the FOA equivalent model. This paper was presented at the 4th Asian Conference on Multibody Dynamics(ACMD2008), Jeju, Korea, August 20–23, 2008. Hong Hee Yoo graduated from the Department of Mechanical Design and Production Engineering at Seoul National University in 1980 and received his Master’s degree from the same department in 1982. He received his Ph.D. degree in 1989 from the Department of Mechanical Engineering and Applied Mechanics at the University of Michigan at Ann Arbor, U.S.A. He is currently working as a professor in the School of Mechanical Engineering in Hanyang University, Seoul, Korea.     

浅析常微分方程的常数变易法

常数变易法是解决一阶非齐次线性微分方程通解的有效方法．但是多数教材只讲解了使用方法，而没有给出此法的由来。讨论常数变易法的由来，并对其进行推广，从而加深对常数变易法的理解和掌握。     

Environmental Gamma radiation measurement using TLDs around TNRC,tripoli

The outdoors absorbed dose rate in the air around the Tajoura nuclear research centre (TNRC), Tripoli has been measured. The measurements were performed using calcium fluoride dysprosium (CaF₂: Dy) thermoluminescence dosimeters (TLD‐200) at 9 locations, all 1 m above the ground level.

The average outdoors absorbed dose rate in air, effective dose and the collective effective dose were calculated to be 54?±?4.6 nGyh^??1, 66.23 μSvy^??1 and 99.35 manSvy^??1, respectively, based on the analysis of thermoluminescence dosimeters data.     

设计变更方案比选与造价控制

本文通过对局部设计变更方案的优化与比选实例,探讨工程设计变更造价控制的一些做法。