Modal Correlation Based Analysis on Dynamic Characters of a Commercial Semi-Trailer''''s Chassis Frames

In order to evaluate two different schemes' structural dynamic characters, dynamic response analysis of a commercial truck's main chassis frames is carried out. On the basis of correlation study between the tested and calculated modal results, the assembled frames' finite element analysis (FEA) models with sufficient precision are built up. Random response analysis in frequency domain is carried out with these FEA models, RMS values of von Mises and main principle stresses of these two frames are obtained. It shows that the analysis results of the distributing tendency and concrete value ranges are coincident very well with test results. And from the results, it could be concluded that frames of scheme A endures relative better loading conditions and should be adopted as the final scheme.     

An Analysis of Foreign Students＇ Overt Error Types Based on HSK Dynamic Composition Corpus

外国留学生在成语习得中的显性偏误有五种类型,分别是遗漏、误加、误代、错序和杂糅。结合＂HSK动态作文语料库＂对以上5种偏误进行了举例和分析,从而帮助学习者认识和区分偏误类型,找出偏误产生的原因,进一步提高成语习得水平。     

Simulation of Cobalt-Rich Crust＇s Crushing Process Based on ANSYS

It is a great concern in international oceanology to mine cobalt-rich crust. At present, spiral mining head is regarded as the best crushing scheme. Based on the dynamic model of spiral mining head, the of cobalt crust＇s crushing process was simulated with the ANSYS software. The material model of Johnson and Cook Plasticity, maximal principal stress failure criterion, and eroding contact arithmetic were selected. At the same time, the influence of cutting depth, feed speed, rotational speed of mining head on torque and force subjected by mining head was taken into account. At last a computer simulation model of crushing process of cobalt crust was established. By analyzing simulation results, the relationships among these controllable process parameters, torque and force can be obtained, which will provide a technical reference for practical mining system.     

Kinematics Analysis Based on Screw Theory of a Humanoid Robot

A humanoid robot is a complex dynamic system for its idiosyncrasy. This paper aims to provide a mathematical and theoretical foundation for the design of the configuration, kinematics analysis of a novel humanoid robot. It has a simplified configuration and design for entertainment purpose. The design methods, principle and mechanism are discussed. According to the design goals of this research, there are ten degrees of freedom in the two bionic arms. Modularization, concurrent design and extension theory methods were adopted in the configuration study and screw theory was introduced into the analysis of humanoid robot kinematics. Comparisons with other methods show that： 1） only two coordinates need to be established in the kinematics analysis of humanoid robot based on screw theory; 2） the spatial manipulator Jacobian obtained by using twist and exponential product formula is succinct and legible; 3） adopting screw theory to resolve the humanoid robot arms kinematics question can avoid singularities; 4） using screw theory can solve the question of specification insufficiency.     

Psychoanalysis of Claudia in Anne Rice＇s Interview with the Vampire Based on Freud＇s Personality Theory

为了对《夜访吸血鬼》中克劳迪娅这个人物做出新的阐释,加深读者对该人物性格及其悲剧命运的理解。从精神分析的角度,运用弗洛伊德的人格理论学说,具体分析克劳迪娅精神上本我、自我、超我的发展过程和特点,并进一步阐明造成其人格特征的成因。     

Chloride Diffusivity Analysis of Existing Concrete Based on Fick’s Second Law

According to the existing concrete core samples obtained in site, chloride concentration and porosity of existing normal hydraulic concrete were measured, and chloride diffusivity in existing hydraulic concrete was studied. By Fick’s second law, the chloride diffusion coefficients in the steady diffusion area were calculated. The chloride diffusion of different mix proportion concrete was tested, and chloride diffusion coefficients and porosities of freshly concrete were measured, moreover, the relationship...     

Empirical Analysis of NATREX Model on Misalignment of Japanese Yen＇s Real Exchange Rate

Abstract： Using Natural Real Exchange Rate model and combining with actual economic situations in Japan, we set up equilibrium real exchange rate model of Japanese Yen. Based on the model we assess the misalignment and also analyze its reason since the beginning of Yen＇s fluctuation. Finally we get conclusions as follows： Yen/Dollar real exchange rate has always been fluctuating acutely. Overvaluation alternates with undervaluation, either of which may last three to five years. Japanese government＇s too much intervention in nominal exchange rate is a very important factor of the misalignment.Overvaluation does much negative effect on the economy, especially in a period when the economy shrinks due to lacking for domestic consumption demand. In that case, currency crisis will probably soon break out.     

The Optimization and Simulation of Crane＇s Arm Frame System Based on MATLAB

臂架系统是门座起重机设计的核心,通过优化臂架系统中各杆件的长度,保证吊重在臂架系统变幅过程中尽量沿近似水平线轨迹的方向运动．运用向量的方法,根据四连杆机构的几何关系计算出了象鼻梁头部的坐标;并运用合理的算法,融入可视化的理念,在MATLAB的环境下计算出了满足设计条件下的各杆件长度;最终将设计结果形成软件．     

Research of Residents＇ Travel Information Mining and Analysis Methods Based on Mobile Phone Location Data

针对城市交通问题日益严重,城市交通管理基础数据需进一步完善,提出了基于手机位置数据采用时空数据分类、聚类、时空数据统计的方法挖掘居民的出行模式和区域的交通量的一种方法,为交通部门提供一种具有高可信度的交通调查数据.以北京市为例证明这一方法可以为交通部门提供基础数据,辅助交通规划和交通管理方案的制定.     

Study of a Comprehensive Assessment Method for Coal Mine Safety Based on a Hierarchical Grey Analysis

Coal mine safety is a complex system, which is controlled by a number of interrelated factors and is difficult to estimate. This paper proposes an index system of safety assessment based on correlated factors involved in coal mining and a comprehensive evaluation model that combines the advantages of the AHP and a grey clustering method to guarantee the accuracy and objectivity of weight coefficients. First, we confirmed the weight of every index using the AHP, then did a general safety assessment by means of a grey clustering method. This model analyses the status of mining safety both qualitatively and quantitatively. It keeps management and technical groups informed of the situation of the coal production line in real time, which aids in making correct decisions based on practical safety issues. A case study in the application of the model is presented. The results show that the method is applicable and realistic with regard to the core of a coal mine＇s safety management. Consequently, the safe production of a mine and the awareness of advanced safe production management is accelerated.     

Study of Double Rocker Five-axis Machine Tool＇s RTCP Errors Based on the Multi-body Theory

为了提高五轴数控机床的加工精度,对双摆头五轴数控机床RTCP（rotation tool center point）模块的误差进行了分析.以多体系统运动学理论为基础,结合刚体六自由度假设理论,建立了误差分析模型.对旋转运动引起的RTCP刀具中心点误差和刀具矢量误差进行了深入分析,推导出了刀具中心点误差和刀具矢量误差公式,并利用实验室开发的刀具轨迹仿真软件,对理想轨迹和实际轨迹进行了对比分析,验证了理论和方法的正确性.     

Simulation and analysis of a Truck Model＇s ride comfort based on fuzzy adaptive control theory

This paper tried to analyse and verify the fuzzy adaptive control strategy of electronic control air suspension system for heavy truck. Created the seven-freedoms vehicle suspension model, and the road input model; with Matlab/Simulink toolboxes and modules, built dynamical system simulation model for heavy truck with air suspension, fuzzy adaptive control model, height control model for air spring, and intelligent control and analyse on root mean square value of acceleration of gravity center of the vehicle under excitation of road. Results show that the fuzzy control had less help to the body vibration on the better pavement, but had the better benefit on the bad road, and the vehicle＇ s root mean square value of acceleration of gravity center is less than passive suspension＇ s obviously.