Applied Mechanics and Materials Vols. 55-57

Abstract: This paper proposes a construction method for informatization surveying and mapping service system and puts forward the thoughts of quantitative measure based on technical economics. Service is the essence to informatization surveying and mapping, GIS rely heavily on technical elements during the early stage of development, so as to bring about many so called "output" problems, that is, under current technology we can provide the kind of data and information what are often needed, but failed to resolve the configuration of information resources, industry-oriented and application and so on "input" problems, which requires the establishment of informatization surveying and mapping service system. The paper constructs the framework for informatization surveying and mapping service system in China, presents its measurable model and a number of issues need to be solved. To this system, the author carry out a measurement in four characteristics of the structure, function, performance and developing. It is concluded that the establishment of this system is beneficial for the promotion and healthy development to informatization surveying and mapping.

Abstract: In this article based on databases of 3D female bodies emulator, 3D jacket emulator, textile material parameters, historical photos and pattern parameters, an automatic pattern making and its 3D emulator model support system of woman warm jacket was developed. In this system different databases were set up and mathematic models of body block and pattern were founded, which they were the main algorithms of program. Program of connecting databases for pattern making was developed and its 3D emulator model was realized synchronization. Based on 20 variables for the female body, the net body block is first be made for individuality and its 3D model also is offered. Then according to the parameters from textile material database and pattern database, pattern is automatically made on the base of the body block. At the same time its 3D jacket model can be presented to user by this system. In this system, managing and connecting different types of databases were come true. This new automatic designing method differs with the traditional pattern making, which introduced the database technology to make works automatically and present 3D emulator model synchronously. This open system is offered user with spreading the database possible and connecting with ready CAD system.

Abstract: Though 3D body scanning system is most developed system for achieving body data, there are some scanning dead angles when body is scanned. Based on the scanning file produced by Telmat 3D body scanner, the structure of scanning file was introduced and model algorithm was analyzed. Holes in model were produced because of scanning dead angles, where were on the side of arms, on the side of legs, on the side of upper body, in the side of arms and in the side of legs. A 3D system was developed to automatically read the scanning file and reconstruct body model in it. At the same time holes can be automatic identified and repaired by this system. Then the model repaired was compared to the initial model produced by Telmat system and to confirm the integrality. The algorithm of program is fit to 3D scanning file from all kinds of body scanner system, which holes were produced. The automatic system perfected 3D scanning system and overcome the difficulty produced by the hardware in scanning system.

Abstract: The application of Automated Trust Negotiation in web service needs to solve two problems. One is the protection of sensitive information, and the other is the determination of negotiation policy. In this paper, the Trust-Serv model is used to manage Automated Trust Negotiation, and explores the further solutions to the two problems above. The introduction of Trusted Computing provides security support for Automated Trust Negotiation.

Abstract: Based on the research about outside shape of woman warm jacket more than twenty years, fashion variables that were representative and can describe the fashionable shape were discussed. Experiment was designed to achieve data of large numbers of female body. Body size variables were statistically analyzed to decide the module that was the basement for achieving data from historical photos. Fashionable characteristic diagrams of garment length, front chest width, shoulder length, collar height and their error bar charts were drawn for discussing the change of fashionable shape. The fashion trends in the future were also prognosticated scientifically. At the same time, a historical database was developed for manufacture and designing, which it is the basement for automatic pattern designing. This new method for fashion trend research was introduced by data mining technology, which it opens our minds for garment science research and offers a new database for improving garment CAD system.

Abstract: As for the troubles existed in multi-exits campus network, this paper analyzes the limitations of some traditional usual solutions and puts foward two solution methods on the basis of the load balancer and the UTM. It was proved that the two mentioned methods can not only meet the load balance between the multi-exits of campus network, and also could give a filter for safety of the data into the internal network. What is more, it can enhance the stability and safety of campus network.

Abstract: The structure of dynamic compaction machine’s chassis is box girder which is welded by steel plate. The strength and stiffness of the chassis directly affect the performance of the machine and the safety of dynamic compaction. According to the mechanical characteristics of a 600t•m dynamic compaction machine, the author analyzed the stress distribution and deformation of the chassis under three kinds of working conditions by finite element method. The results show that the finite element method can effectively reflect the overall state of stress and the characteristics of local stress of the chassis. The structure of chassis has sufficient strength and stiffness. The thickness of some parts of the steel plate can be properly reduced. These results provide basis for the further optimal design of the chassis.

Abstract: The dynamic response problems of out-plane line loads by a shallow-embedded circular lining structure were investigated here by using the method of Green’s Function. Firstly a suitable Green’s function was constructed, which is an essential solution to the displacement field possessing a shallow-embedded circular lining structure while bearing out-plane harmonic line loads at an arbitrary point. Then we obtained a series of algebraic equations to solve this problem after constructing scattering waves that satisfied the zero-stress condition on the ground surface. Lastly, some numerical examples are given to show the effects that different parameters influence dynamic stress concentration factor (DSCF) by out-plane line source loads.

Abstract: With the improvement of GPS measurement methods and its increasing precision, the GPS technology obtains more and more widespread application in our country marine survey. This paper mainly discussed the GPS technology using in the sea navigational affairs project application, combined with Nantong YangKou port Artificial Island project, introduced about some methods of using GPS in the hull dolosse installment localization and the seabed, the island wall monitoring in detail. And also some beneficial experience of GPS technology applying in hull installment localization and the marine monitor were summarized.

Abstract: Spectral images contain a large volume of data and can be efficiently compressed by low dimensional linear models. However, there is a trade-off between the accuracy of spectral and colorimetric representation. When a spectral image is reproduced by a low-dimensional linear model, spectral error and color difference are contrary to each other and minimizing the colour error is by no means equivalent to minimizing the spectral error. Although one aim of a spectral-image file format is to preserve and represent the spectral information, most users are likely to reproduce a spectral image on a trichromatic image-reproduction system and therefore it is important that the spectral information is not preserved at the expense of colorimetric accuracy. In this study a method for spectral encoding that provides an efficient representation of the spectral information whilst perfectly preserving the colorimetric information is analysed. The lossy compression technique that is considered in this work is based on a low-dimensional linear model of spectral reflectance, with the first three basis functions represent color information and the additional basis functions are metameric blacks which preserve spectral information.