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Collision Detection is one of the key issues on large-scale scenes roaming and it plays important part in the computer application and virtual reality. For the OBB bounding box algorithm in collision detection, this paper introduces a method based on the virtual occluders, which constructs the simple virtual occluders for OBB bounding box and realizes collision detection through intersection test...
A 3D solid model for gripper structure was built with 3D modeling software Pro-e to further improve the structure. Finite-element analysis software ANSYS was applied for mechanical analysis of gripper structure to investigate the stress status of grippers with different structures under certain force; by reference to the results, related mechanical properties were compared to obtain the stress distribution...
Based on the experimental teaching in Computer major, open experimental teaching, which is a teaching mode in teaching practice system, proposes ??one center, three combinations and with five changes?? as its guiding ideology, through setting up a network-based laboratory management platform, to implements the experimental teaching with such contents as experimental time, experimental resources, experimental...
To increase control precision and improve dynamic characteristic of electro hydraulic position servo system, a method of processing data called orthogonal test that usually adopted in chemical experiment is applied. After parameters are ensured, the Critical gain KV of the open-loop system is determined by the Stability, then the factors are determined and the orthogonal table is constituted to try...
Rock bolt dynamometer is the important safety equipment which measures the rock bolt stress and is powered by battery which the most capacity is limited to 2500 mAh. Replacing battery is forbidden in coal mine according to requirement of mine safety. Therefore to reduce power consumption and improve battery life is the key technology of the design of rock bolt dynamometer. Choosing a low-power microcontroller...
Workflow technology based on JBPM (Java business process management) is a hot subject of researching currently. Firstly the article introduces features and operating principle of JBPM workflow engine, and analyzes internal components structures and interfaces of JBPM. Then, the article introduces the business process and functional requirements of traditional document. At last, the article, whose...
In this paper, we present a method using Webpage segmentation algorithm to improve the performance of the Webpage content extraction. The traditional methods often depend on parsing the DOM tree of the Webpage and judging each node of the DOM tree to determine which node is the text node, this kind of method has a potential problem, it sometimes throws part of the content away because of its local...
The medical immunology course is a main course for medical students. Both immunology theoretical and experimental teaching are abstract, complex, boring, tedious, together with the lake of teaching resources (in particular, digital teaching resources), so it result in the immunology traditional teaching mode can not meet the needs of the development of the immunology curriculum teaching. In order...
Trust risk has become one of the main barriers to online trading. According to the theory studies and e-commerce's practice, the utilization of intermediary is an effective way to building online trust. This paper establishes an stage game model revolving intermediary organization order to reveal the mechanism of intermediary in trust building. For the sake of finding the equilibrium of the game model...
This paper aims at the problem of software's abuse in the computer system, and puts forward the "Software Registration" strategy in the context of enterprise networks and the computer systems within. Based on this strategy we have designed a computing system that is fit for internal use in enterprise networks by taking control of the use of computer software. The paper analyzes the system's...
In virtue of the development of power electronics technology, microcomputer control technology and motor control technology, electric power steering (EPS) can markedly improve the automotive dynamic performance and static performance, enhance the driver's comfort and security, decrease environmental pollution. In this paper, the constitutions and its operational mechanism of electric power steering...
Service Discovery technologies were developed to fulfil the Pervasive Computing's ??disappearance??. In Pervasive Computing the courses of devices using Service Discovery Technologies have stable and unstable states, the existing Service Discovery Technologies have a shortcoming of having no response to the stable states, and this brings unnecessary cost of service. To overcome this demerit a method...
In this paper, formal language is used to describe the data warehouse model in order to confirm the significance of the data warehouse modeling. The design process of describing the data warehouse model is divided into five layers, including the identification of themes, build dimension tables and fact sheets, model mapping, metadata management, and build the index and design of process chart. On...
Generally speaking, a large number of point-cloud data will be generated in the process of collecting 3D structure information of large building using the 3D LIDAR technology. Based on analyzing raw files content and form 3D laser scanning point-cloud data is reorganized and a storage mean of large-scale point-cloud data which is by data stream means is presented in this paper. The data is stored...
This paper puts forward the background of the CRC arithmetic by which it means how important the arithmetic can be in the field of the communication, tells us the principles of CRC arithmetic, introduces a kind of common ways about how to make the code and how to decode of the CRC arithmetic, uses a lot of words to introduce how the CRC codes be made through one kind of the CRC arithmetic which is...
The offline components of CluStream clustering algorithm based on distance, and it is difficult to find non-spherical character of the cluster. This paper proposes a data streams clustering algorithm based on grid and particle swarm optimization, the algorithm based on two-tier structure of CluStream clustering algorithm. The grid feature vector to represent a snapshot, the grid density, and grid...
Container terminal is important in global trade than ever because of rapid growth of marine transportation and containerization. Vessel service time is one of the most important factors in shipping industry. To estimate the vessel service time need consider internal factors of container terminal. Qin pretreated a kind of influenced diagram before the factors pretreated by random decision tree. However...
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