Relationship of Conservation of Historic Buildings and Urban Construction     

CHEN Wei  HU Bin 《保鲜与加工》2004,(5):19-22

The conservation of historic buildings and their environment is an unavoidable problem in urban construction. In this paper, the authors give a few new thoughts about the problem. First, the historic buildings are important part of the core power in city competition.Second,the conservation work should be combined with their development. Third, a classified and multilevel system of protection and reuse of old buildings should be set up.  相似文献   

Lighting Design of Chinese Traditional Buildings and Application of New Type of Little Power LED     

LI Xu -ji  SHEN Tian- xing  MA Jian 《保鲜与加工》2006,(5):86-89

This paper is a part of the research on the lighting techniques of the traditional Chinese buildings in Summer Palace,Beijing,which is a sub-project of the Municipal Research Project on the Correlative Techniques for Beijing's Sustainable Development(Y0604017040391).The work,which the authors took part in,on the most representative Chinese traditional buildings in Summer Palace,is taken as a case study on lighting design and lab simulated experiments and checked by practical result,illustrating a working frame for other similar lighting design works.  相似文献   

Control and Analysis on Environmental Object of Construction Project     

CHEN Zuo chang 《保鲜与加工》2002,(2):93-97

With social development, the environment has become one of the major topics in human life. Although the construction project may improve economy and environment, it also may exert negative impact on environment. Cost, schedule and quality are three important objectives of construction project and on the objective of environment have not been focused. The author of this paper reiterated the importance of environmental control for the construction project and key areas to be focused on during the whole process of construction project.  相似文献   

Robust Adaptive Control Based on On-line Identification to Multi-parameters     

YANG Zhi ping  FENG Su mei 《保鲜与加工》2002,(1):65-69

In system controlled,Sampling these parameters and with parameters for controller in time, it is an object to adaptive control. The article presents a scheme that the structure parameters on it's model and model parameters is robust identified by on line, while to optimal of algorithm on adaptive control is fulfilled. In control scheme, method of intelligent identifying to the structure parameters(levels of model) and algorithm of robust pole placement are introduced also It is advancer for already mentioned scheme. Whole scheme presents new model on adaptive control.  相似文献   

A Medical Image Quantization Method Suited for PACS     

LI Qing hui  PENG Cheng lin  HOU Wen sheng  LUO Xiao gang 《保鲜与加工》2002,(3):78

Image compression is very important in picture archiving and communication system(PACS). The author studied the statistical distribution of image wavelet subimage coefficients and concluded that the distribution of wavelet subimage coefficients is similar to that of Laplasian distribution. On the other hand, in image reconstruction, the coefficient with different amplitude owns different weight, and different accuracy can be applied to different coefficients according to their different weight. Then, the author has designed a image quantization encoding scheme for PACS. In this scheme, they selected the sample-standard-deviation of coefficients in every subimage as the quantization threshold, and accurately encoded those coefficients with higher weight. Also, this algorithm utilized the visual character of human. The test has proved that the main advantages of this method are the simplicity in computing and predictable encoded coefficients, and a high compression efficiency can obtain too.  相似文献   

The Effect Factor of Surface Tension of Liquid/Vapor in Molecular Dynamics Simulation     

LIU Chao  ZENG Dan ling 《保鲜与加工》2002,(4):76-78

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Evolvement of Plastic-loop of Fine-sandstone Under the Loading and Unloading Conditions     

WANG Hong  XU Jiang  YANG Xiu-gui 《保鲜与加工》2006,(4):80-82

The deformation characteristics and the plastic-loop of the fine-sandstone is studied under the loading and(unloading) condition at the three different deformation-rates and the two different stress-levels,the results show: 1) There is really the plastic-loop in the deformation curve for the loading deformation curve is different form the unloading deformation curve.But the plastic-loop is nearly unchangeable since the second circulate loading.2) There is different for every imitational parameter between the first deformation curve and the second deformation curve at the different stress-levels and the different deformation-rates,but every imitational parameters become more and more invariable gradually since the second circulate curve.3) With the change of the deformation-rates and stress-levels,the imitational(parameters) will change with it.4) The imitational parameters are different for loading section and unloading section of the fine-sandstone deformation curve at the same circulate curve under the same deformation-rate and stress-level.  相似文献   

A New Method for Parameterized Design of Metallic Doors and Windows     

SONG Yu chuan  YAN Chun ping  LIU Fei  LIU Wan qi 《保鲜与加工》2001,(4):36-39

According to the graphics characteristics of metallic doors & windows design and based on the research of graphics dimension restriction problems. This paper provides a new method for parameterized design of metallic doors & windows in virtue of expression solution. In this method, the restrictions of graphic elements have been changed into the parameter expressions of sizes and positions of graphic elements. Through the calculation of such expressions, the parameter driven method has been reached. Thus the parameterization of graphics can be easier and quicker than before. It can be used to setup the open parameterized graphics libraries.  相似文献   

New Method to Study In-situ Stress of Rock Mass by AE and Structure Analysis of Rock Mass     

ZHOU Xiao ping  DENG Meng  ZHANG Fu sheng 《保鲜与加工》2001,(6):109-113

In this paper, the authors adopt a method of structural analysis and stereography in combination with acoustic emission Kaiser Effect test in laboratory to find out the main direction of initial stresses. For overcoming the shortcomings of Kaiser effect by comparing it with traditional methods of measuring in-situ stresses, it is shown that this method is simpler, more economical and convenient for a large number of measurements and for studying the law of changes of regional in-situ stresses.  相似文献   

Function and Limiting Value of Minimum Ratio of Reinforcement for Tension Reinforcement in Seismic Frame Beams     

《保鲜与加工》2003,(3):30-35

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