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The STRETCH meat grinder is one typical inductive pulsed-power supply topology for electromagnetic launch system. It has remarkable current amplification ability as a single unit, but one module cannot provide enough amplitude and width for the load current of the railgun launching. This paper discusses the effects of different triggering delays on the load current with two STRETCH meat grinder modules...
Fruit information perception and nondestructive picking method are the key technologies for harvesting robot. In this paper, the kiwifruit automatic identification method and nondestructive picking end-effector were studied. Firstly, a method of obtaining image from the bottom of fruit was proposed based on the clustering characteristics of fruit and the method of elliptic Hough transform was used...
Maintenance tools present a difficult problem in the complex support system, for the considerable varieties to be integrated and optimized. In this paper, a maintenance tools category integration method was developed, which minimizes the support burden and costs. In order to obtain the solution, a maintenance tools category integration analysis method and an integrated decision-making method were...
We conducted a quasi-experimental study of pair programming versus solo programming, in the context of a required, four-hour, intermediate level-course that focuses on the acquisition of a second language (C/C++). We found pair programming served as a protective factor for the retention of female students and less experienced students. Our findings support those of prior studies that suggested that...
Presents an optimization algorithm about cubic NURBS based on internal k-order- derivative constraints, and according to reset those control points, node vectors and weights, we can extend the NURBS curves to one target point or more target points. And we also prove those methods' effectiveness through some specific examples.
Arsenic exposure from drinking water was considered to be a risk factor for skin lesions. In our research, the total arsenic in water and urine samples were analyzed by ICP-MS and AFS, respectively, Arsenic concentration in drinking water was 4.04–720μg/L, and there were 63.49% (80/126) samples above 50μg/L. Urinary total arsenic concentration was 6.51–775.73μg/gCr. Spearman rank correlation was used...
This study focuses on the application of multimedia technology in foreign language teaching and learning in China's colleges. It shows that multi-media technology has posed challenges in such aspects as teachers, students, teaching and learning environment, and teaching evaluation and management. And it points out that the existing problems in it mainly include the lack of the integration of multimedia...
The cultivation of high-quality innovative talents is the needs of the times. It will definitely push the teaching management, which is also an important part of college management, to reform the traditional mode of teaching management, constantly upgrading educational thinking, deepen the reform of education management system, and optimize the teaching process control, so as to maximize the enthusiasm...
Actual project driven teaching model is proposed in order to redress the deficiency of traditional teaching model which cannot well improve practical ability and accumulate effectively project experience for software engineering majors. It is applied to the project of College Graduates Employment Information Service Platform of Hebei Province in China. The project consists of three stages, that is,...
Modern distance education is an important education style in China. With the rapid advancement of information technologies, especially computer multimedia technology and network technology, the distance education becomes an open complex giant system with enormous components and anfractuous relationship between them, causing its complicated structure and distinct features, such as openness, hierarchy,...
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