多目标值弯矩平衡法的CSR散货船艉货舱有限元分析

由于散货船的艉货舱结构的特殊性,在一般的设计中大多采用经验类推,往往不能真实反映结构的实际承载要求。以某63500t CSR散货船为目标船,采用法国BV船级社Veri STAR-Hull软件,基于多目标值、多评估区域的弯矩平衡方法,对艉部货舱进行强度校核和优化设计,既解决了原设计的不足,又通过减轻强度过剩结构来合理控制船体的结构质量。该方法得到相关船级社的认可,为将来HCSR船型设计提供了技术储备。

广义线性模型(四)

本讲座是广义线性模型这个题目的一个比较系统的介绍。主要分 3部分 ;建模、统计分析与模型选择和诊断。写作时依据的主要参考资料是L .Fahrmeir等人的《MultivariateStatisticalModelingBasedonGeneralizedLinearModels》。

Another Approach to Multiobjective Programming Problems with V-invex Functions

In this paper, optimality conditions for multiobjective programming problems having V-invex objective and constraint functions are considered. An equivalent multiobjective programming problem is constructed by a modification of the objective function.Furthermore, a (α, η)-Lagrange function is introduced for a constructed multiobjective programming problem, and a new type of saddle point is introduced. Some results for the new type of saddle point are given.

Power system stabilizer design using hybrid multi-objective particle swarm optimization with chaos

A novel technique for the optimal tuning of power system stabilizer (PSS) was proposed,by integrating the modified particle swarm optimization (MPSO) with the chaos (MPSOC).Firstly,a modification in the particle swarm optimization (PSO) was made by introducing passive congregation (PC).It helps each swarm member in receiving a multitude of information from other members and thus decreases the possibility of a failed attempt at detection or a meaningless search.Secondly,the MPSO and chaos were hybridized (MPSOC) to improve the global searching capability and prevent the premature convergence due to local minima.The robustness of the proposed PSS tuning technique was verified on a multi-machine power system under different operating conditions.The performance of the proposed MPSOC was compared to the MPSO,PSO and GA through eigenvalue analysis,nonlinear time-domain simulation and statistical tests.Eigenvalue analysis shows acceptable damping of the low-frequency modes and time domain simulations also show that the oscillations of synchronous machines can be rapidly damped for power systems with the proposed PSSs.The results show that the presented algorithm has a faster convergence rate with higher degree of accuracy than the GA,PSO and MPSO.

Multi-Objective Genetic Algorithm to Design Manufacturing Process Line Including Feasible and Infeasible Solutions in Neighborhood

This paper treats multi-objective problem for manufacturing process design. A purpose of the process design is to decide combinations of work elements assigned to different work centers. Multiple work elements are ordinarily assigned to each center. Here, infeasible solutions are easily generated by precedence relationship of work elements in process design. The number of infeasible solutions generated is ordinarily larger than that of feasible solutions generated in the process. Therefore, feasible and infeasible solutions are located in any neighborhood in solution space. It is difficult to seek high quality Pareto solutions in this problem by using conventional multi-objective evolutional algorithms. We consider that the problem includes difficulty to seek high quality solutions by the following characteristics： （1） Since infeasible solutions are resemble to good feasible solutions, many infeasible solutions which have good values of objective functions are easily sought in the search process, （2） Infeasible solutions are useful to select new variable conditions generating good feasible solutions in search process. In this study, a multi-objective genetic algorithm including local search is proposed using these characteristics. Maximum value of average operation times and maximum value of dispersion of operation time in all work centers are used as objective functions to promote productivity. The optimal weighted coefficient is introduced to control the ratio of feasible solutions to all solutions selected in crossover and selection process in the algorithm. This paper shows the effectiveness of the proposed algorithm on simple model.

Using Multi-destination ZTCM to Evaluate the Recreational Values of Cultural Sights:an Application to Jiayuguan,China

This study explained the importance of environmental protection in tourism development and illustrated the relationship between recreational resource valuation and environmental consideration.We compare different models of travel cost method and reiterates long-time existing problems of multi-destination and treats of time opportunity cost(TOC).Taking Jiayuguan's cultural sights as an example,we establish an updated method called multidestination zonal tourism cost method to evaluate the recreational values(RVs) of selected three cultural sights.We divide trip packages of Jiayuguan's tourists into 11 portfolios.Each portfolio can be seen as a separate commodity,and each commodity has its own demand curve.According to demand curves we can calculate consumer surplus(CS) of different portfolios of tourist destinations and later we sum up the total travel costs(including travel expenditure and TOC) and CS to come to the RVs of each portfolio.We then apply suitable proportions to calculate the RVs between different destinations in the portfolio.In the end,we add up all the RVs calculated for the objective destination.Using this method,we draw conclusions that Jiayuguan's RV in 2006 includes national and international values,summing up to 738.4762 million yuan.The tourist expenditure,CS and TOC of Jiayuguan is proportionating 62.96,32.28 and 4.76%,respectively.This study is also an example of non-market valuation of cultural tourism resources.

SPECIAL ISSUE： DIALOGUE, INTERACTION AND NEW DEVELOPMENTS IN PHILOSOPHY IN CONTEMPORARY CHINA- SPECIALIST FORUM ON CHINESE, WESTERN AND MARXIST PHILOSOPHIES：Issues of the age and possible responses in configuring contemporary Chinese philosophy

Efforts are needed in ,the following three aspects in configuring contemporary Chinese philosophy： providing various value goals for various social groups; re-constructing the value objective for the Chinese; and providing new human nature foundation for contemporary Chinese ethical conduct and legal system. Chinese, Western and Marxist philosophies must break disciplinary segmentation and take the reality of Chinese society and its trends of development as their common platform of thinking. By using their respective intellectual resources, they should endeavor to build up a social philosophy thatmay satisfy the needs of Chinese people and China＇s development, and is able to provide guides to their life and practice.