铝挤压机供锭器主行程伺服电机驱动的研究

介绍了铝挤压机供锭器从液压驱动系统改造为伺服电机驱动系统的计算及选型过程。以31.5 MN和55 MN两种规格铝挤压机供锭器为研究对象,依据供锭器的参数,分别计算得到了适合31.5 MN和55 MN两种规格铝挤压机供锭器驱动的伺服电机型号。不仅保证了供锭过程的快速平稳运行,而且降低了设备成本。

胰腺形态与主胰管在胰实质中行程特点的再认识与临床

结合临床难题对腹腔脏器的大体解剖学进行再研究．会获得一些有助于推动临床进展的新认识。

Conceptual Architecture for Remotely Piloted Operation Mode in Commercial Aircraft

With the increasing civil aviation passengers and the rapid development of aviation logistics,the study on remotely piloted operation(RPO)mode has received extensive attention.RPO mode constructs the piloting decisionmaking mode which involves the tripartite collaboration among airborne automatic/autonomous system,remote ground-based crews and air traffic control.In this paper,we describe the organizing architecture for commercial remotely piloted aircraft(CRPA)system and its components.Compared with the current operation mode,the new air-ground collaborative decision-making mode has been established with six different situations based on the type of the flight and the condition of the remote pilot.Taking airport surface operation as an experimental example,we model the airport surface operation process and compare the advantages and disadvantages between RPO mode and the current dual-pilot mode from the perspectives of time and operation coverage,and draw conclusions that RPO mode can basically cover the flight operations of the dual-pilot,improve the accuracy of pilot operations and greatly reduce response time by 48%in pre-flight inspection.The above research would be the foundation for the RPO development of commercial aircraft in China.

Association Model Among Competitive Advantage Factors and Corporate Performance

This study sought to answer the following question： The empirical model in which strategic planning affects innovation and competitive advantage and how does this influence corporate performance perceived by the CEOs of companies in Monterrey, Nuevo LEon, does this have an acceptable outcome in regards of the theoretical fit model？ This study was empirical, quantitative, descriptive, exploratory, explicative and transversal in nature. The studied population consisted of executives who attended the training sessions of the Institute of Public Accountants of Nuevo Le6n （IPANL）. For this study, a sample of 134 executives was selected by convenience sampling. For the data collection, an instrument of 94 indicators was elaborated and the indicators within the study were the following： 31 indicators for strategic planning, 15 indicators for innovation, 24 indicators for competitive advantage, and 24 indicators for corporate performance. The null hypotheses were analyzed using multivariate analysis denominated as a structural equation model, utilizing maximum plausibility methods. According to the selected structural equation indexes, the obtained results show that the proposed model had an acceptable goodness of fit index.

The Development and Realization Mechaismof Concurrent Engineering

Aim To study the development and realization mechanism of concurrent engineering(CE).Methods The realization mechanism based on multi-agent and micro-circulation were dis-cussed.Results The specialties of micro-circulation are wholly adaptable to the circulationtheory and information exchange requirement in CE,which can explain the nature of CEsuccessfully.Conclusion The micro-circulation theory can be adopted as a new realizationmechanism of CE.

Motivating Teachers

Teachers can motivate their pupils by fostering autonomous learning or---especially if they feel under pressure themselves--teachers can hamper the motivation of their students by being controlling. The purpose of this study with 488 secondary school teachers from Austria was to examine the satisfaction of teachers＇ needs for autonomy, competence and relatedness and meaningful relations to perceived job-related pressure and self-efficacy, to gain an increased insight in autonomy supportive contexts. The results point out that there are various sources for pressure in the teaching profession and structural equation modeling revealing a reciprocal relation between the satisfaction of the need for autonomy and pressure in teaching, as well as between the satisfaction of the need for competence and self-efficacy. In addition perceived pressure had a negative impact on teachers＇ self-efficacy and self-efficacy in turn influenced the satisfaction of the need for autonomy. In summary, considering basic psychological needs satisfaction of teachers seems relevant to create autonomy supportive environments for pupils and teachers in schools.

The Research On Protecting of Criminal Victims ＇ Rights

In the scales of the human rights protection which is not only meant to protect the basic rights of suspects, but also included the rights of victims, both are very important. However, during the execution process, the criminal legal relations are always simply to be defined as the relationship between the national authorities with the suspects except the victims. The victim＇ s benefits and aspirations are often ignored because they are viewed as a category of witnesses. Therefore, it is against the will of legals,which is better to give the victims the concerned parties to participants the processing, then their rights can be protected and got the coordinating compensation.

Modelling of vehicle interaction behavior during discretionary lane-changing preparation process on freeway

In order to increase the accuracy of microscopic traffic flow simulation,two acceleration models are presented to simulate car-following behaviors of the lane-changing vehicle and following putative vehicle during the discretionary lanechanging preparation( DLCP) process, respectively. The proposed acceleration models can reflect vehicle interaction characteristics. Samples used for describing the starting point and the ending point of DLCP are extracted from a real NGSIM vehicle trajectory data set. The acceleration model for a lanechanging vehicle is supposed to be a linear acceleration model.The acceleration model for the following putative vehicle is constructed by referring to the optimal velocity model,in which optimal velocity is defined as a linear function of the velocity of putative leading vehicle. Similar calibration,a hypothesis test and parameter sensitivity analysis were conducted on the acceleration model of the lane-changing vehicle and following putative vehicle,respectively. The validation results of the two proposed models suggest that the training and testing errors are acceptable compared with similar works on calibrations for car following models. The parameter sensitivity analysis shows that the subtle observed error does not lead to severe variations of car-following behaviors of the lane-changing vehicle and following putative vehicle.

Mechanical Design and Students＇ Creativity ＂Think outside the Box＂

A design project was used in junior level mechanical design course to challenge the students＇ creativity skills. Beside the theoretical foundation of the course subject, the students were introduced to several professional skills such as： decision making tools, technical review meetings, interaction with customers, and teamwork skills. The design challenge was to develop a bike rack to meet a list of technical and marketing constraints. Details of the project requirements are presented with a brief overview of the main project mentoring tools. Students＇ creativity is discussed through two samples of the student work. It was noticed that, the basic creativity skills of the students can be improved by using some of the training tools, however, the students vary in their response to this training.