基于AMOS的武汉市各区市民质量满意度测评与分析——以武汉市2017年11月月度测评为例

市民质量满意度作为武汉市对各区政府质量工作考评的核心指标,能有效反映各区政府质量工作水平及市民关切。论文采用结构方程模型(structual equation model,SEM)构建市民质量满意度测评模型,运用矩结构分析(analysis of moment structures,AMOS)统计软件计算,最终算得各区市民质量满意度得分及具体测评指标得分,全面反映了各区政府质量工作水平。同时,分类收集的各区市民意见与建议,为各区政府精准改进质量工作提供了有效参考。

天津市大型科学仪器设备共享水平路径探究

数据表明,天津市大型科学仪器设备共享效率低于全国平均水平,探索提升天津市大型科研仪器设备的共享水平路径对于提升天津市的仪器使用率和创新绩效有着重要的作用。现以天津56家大型科研仪器设备共享服务单位问卷调查数据为基础,对共享影响因素进行调查,借助SPSS19.0软件提取供给能力、政策支撑等5个关键性制约因素。借助AMOS22.0对共享水平提升路径概念模型进行验证,结果表明,政策激励对仪器的共享水平同时具有间接和直接影响的正向作用,管理机制对共享水平具有负向影响作用,供给能力、仪器属性和共享平台对共享水平均为正向影响作用。基于定量分析结果,提出了路径优化的对策和建议。

Ultimate load bearing capacity evaluation of concrete beams subjected to freeze-thaw cycles

A theoretical prediction method based on the change of concrete material is proposed to evaluate the ultimate bending moment of concrete beams which have undergone freeze-thaw cycles （PTCs）. First, the freeze-thaw damage on concrete material is analyzed and the residual compressive strength is chosen to indicate the freeze-thaw damage. Then, the equivalent block method is employed to simplify the compressive stress-strain curve of the freeze-thaw damaged concrete and the mathematical expression for the ultimate bending moment is obtained. Comparisons of the predicted results with the test data indicate that the ultimate bending moment of concrete beams affected by FTC attack can be predicted by this proposed method. However, the bond-slip behavior and the randomness of freeze-thaw damage will affect the accuracy of the predicted results, especially when the residual compressive strength is less than 50%.

Design and Analysis of Typical Buoyancy Tank Riser Tensioner Systems

The method for design and analysis of a buoyancy tank riser tensioner system （BTRTS） was put forward in this paper, taking the free standing hybrid riser＇s top buoyancy tank as an example. The design procedure was discussed and was also illustrated in a flowchart, after a short description of the global arrangement, structure configuration, and the function of different types of buoyancy tanks （BT）. The objective of this paper is to describe a way of developing a BT with minimal hydro force, maximal net lift, and no redundancy of compartments. The method of determining the main dimensions of the BT, namely the length and the outer diameter, was outlined. A series of investigations was conducted for a West Africa FSHR BT design, and the effect of the ratio of the length to the outer diameter （L/D） on the hydrodynamics and the weight of the BT was discussed. The methodology of designing the internal structure of the BT was presented. The effects of the number of compartments and the dimension of the inner stem on the BT weight and strength were compared. The relationship between inner structure and the number one index of the BT as well as the riser＇s top tension factor （TTF） were illustrated for normal operating conditions and conditions with one or more compartments （or inner stem） damaged. A design instance was given in this paper, when L/D is 4-6, the BT weight and the drag force are compromised. When the BT is divided into 10 compartments, the riser TTF will reach the maximum value, and the ratio of the stem OD to shell OD is about 0.3. A global strength analysis method of the BT and the main load case matrix was also included in the paper, together with the local strength analysis of the buoyancy tank＇s pad-eye assembly.

Equivalent Bar Conceptions for Computer Analysis of Pantographic Foldable Structures

An equivalent bar conception is firstly developed for the computer analysis of pantographic foldable structures. The uniplet of two three node beam elements is assumed as a six bar assembly with respect to least norm least square solution for the elastic strain energy equality. The equilibrium equation is developed for the equivalent models, and the internal forces formulated sequently for backup calculation. This procedure is proved practical for some engineering, and some interesting concepts proposed. Finally, three numerical tests are presented.

Rejuvenating wood carving industry in Taiwan Sanyi： A perspective of strategic management

This research aimed at providing suggestions to rejuvenate the wood carving industry in Taiwan Sanyi. The authors conducted interviews with representative store keepers and sculptors to gain industrial insights, and applied the strategic matrix analysis developed by Dr. Seetoo to examine industrial conditions and formulate strategic suggestions for wood carving companies. The industry was found lack of market orientation, which was considered as the critical factor of the long term depression. However, a market of tourism for nostalgic and cultural experience started developing in the near area, providing opportunities for Sanyi wood carving industry to recover. The main suggestions the authors made are （1） restructuring the product scope to respond to the market, and （2） branding with resorts in near area.

ON ASYMPTOTIC JOINT DISTRIBUTIONS OF EIGENVALUES OF RANDOM MATRICES WHICH ARISE FROM COMPONENTS OF COVARIANCE MODEL

In this paper, the authors derive the asymptotic joint distributions of theeigenvalues of some random matrices which arise from components of covariance model.

A formal structure for symbolic reachability analysis of rectangular hybrid systems

For symbolic reachability analysis of rectangular hybrid systems, the basic issue is finding a formal structure to represent and manipulate its infinite state spaces. Firstly, this structure must be closed to the reachability operation which means that reachable states from states expressed by this structure can be presented by it too. Secondly, the operation of finding reachable states with this structure should take as less computation as possible. To this end, a constraint system called rectangular zone is formalized, which is a conjunction of fixed amount of inequalities that compare fixed types of linear expressions with two variables to rational numbers. It is proved that the rectangular zone is closed to those reachability operations-intersection, elapsing of time and edge transition. Since the number of inequalities and the linear expression of each inequality is fixed in rectangular zones, so to obtain reachable rectangular zones, it just needs to change the rational numbers to which these linear expressions need to compare. To represent rectangular zones and unions of rectangular zones, a data structure called three dimensional constraint matrix(TDCM) and a BDD-like structure rectangular hybrid diagram(RHD) are introduced.