Exploration of Gas Chromatographic Retention Indices (RIGC) of Phenols by Molecular Electronegativity-Distance Vector (MEDV)     

HU Li-mei 《保鲜与加工》2004,(4):67-71

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Region Study on Sciences of Human Settlements in China     

Yang YuZhe 《保鲜与加工》2005,(3):5

By review of region study in recent development of history science, geography and Sciences of Human Settlements, this paper points out that material collecting without interrelated analyzing as well as focusing on main question and assumption without enough argumentation are main problems in this field now. The method renovation & combination with related subjects are discussed, this paper concludes that strengthen interdisciplinary study with Geography is a key issue in the future development of region study in Sciences of Human Settlements and possible approach to "technical development' and "humanity concern'.  相似文献   

Sociological Factors about the Urbanization of Traditional Community --Discussion on Ciqikou Community     

Dai Yan 《保鲜与加工》2005,(3):9-12

The modernization has been the dream that Chinese nation has wished eagerly to realize all the time. In some sense, the modernization of China means urbanization. The reform and opening - up over the past 20 years , built and made the enormous achievement in urbanization of China, have changed the appearance of the city of China greatly. But to numerous traditional historical zones, what kind of urbanization way should on earth be taken, it has been the question long - term in dispute of the planning circles all the time. In this paper, Ciqikou community of Chongqing as an example, doing some discussions from sociology on this question, the author hopes, that for such difficult problem, by this settlement a piece of breach can be found as soon as possible.  相似文献   

Influence of the Flood-Control-Projects on the Hydrodynamic State of the Rivers Confluence in Chongqing     

Chen JingQiu  Zhao WanXing  Ji ZheGang  Wen Cen  Liu XueLan 《保鲜与加工》2005,(4):47-51

Though the Flood-Control-Projects along Yantze River and Jialing River in Chongqing may well improve the urban traffic and construction,it may change the river hydrodynamic characters.There may be two consequences,one is to reduce the size of cross section and the other is to change the river shape,such as the curvature radius.The phenomena of the local backwater and velocity variety are obvious,which result in some problems for the navigation: sediment,transport and so on.In this paper, the study object is the Flood-Control-Projects and Yangtse River and Jialing River,and the aim is to study the influence of the Flood-Control-Projects on the hydrodynamic state of the two rivers.Using the numerical technique,with the two rivers hydrodynamic model the flow field's change of river after completion of Flood-Control-Projects is simulated and the reasons caused by the change are analyzed.  相似文献   

Electrochromism Capability of Poly(aniline-co-o-anisidine)     

TANG Qi  MA Li 《保鲜与加工》2005,(3):114-116

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Resource Management in Application System     

GUO Ping~  DENG Shao-jiang~  WU Yuan-hong~ 《保鲜与加工》2004,(1):80-84

Application system generally refers to all kinds of computer information system. It aims at improving the sharing and application of the resource. The resource in application system usually means data resource. For computer management and maintenance, there are not only data resource, but also program resource and network resource. Effective management of this resource is key to ensure proper work of the application system. In this paper, the basic pattern and policy for resource management is put forward and a method to build and realize the resource layer that lies between database layer and application layer is to be found. This management layer, which skillfully connects the application system with resource and establishes good base for application and exploitation of system, is named as resource management system.  相似文献   

On Noise Control of the Environment in Advanced Living District     

LI Bi-xiang  LIN Tai-yong 《保鲜与加工》2004,(2):1-4

The living environment is becoming more and more important,one of the main elements which affect it is noises.This paper takes the Zhonghuafang for example,to research how the whole planning and the designing for the living district affect the control of noises.Applying architectural technology,in order to cut down noises,a sound screen around the site is made and the distinctive constitution for the buildings is designed.The methods of disposing noises are proposed to make sure that the residents of the advanced living district are content with the living environment.  相似文献   

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   

Performance Analysis of Anti-CW Interference in MC-CDMA Systems     

HE Shi-biao~  YANG Shi-zhong~ 《保鲜与加工》2004,(11):59-62

The multicarrier-code division multiple access (MC-CDMA),which is the combination of direct sequence CDMA (DS-CDMA) and orthogonal frequency division multiplexing (OFDM) techniques, offers various advantages over single-carrier CDMA system. Some of the advantages are that MC-CDMA systems possess can remove the intersymbol interference (ISI) and enhance narrow-band interference suppression capabilities. So the MC-CDMA technique becomes a focus in the field of mobile communication. The authors introduce the typical MC-CDMA system model, discuss the decision statisticalvariable in Rayleigh fading channel included the CW interference, and give the expressions of probability of error in uplink. An approach is proposed with Modified Equal Gain Combining (MEGC) to decrease the effect of CW interference. Theoretical analysis and numerical results show that the anti-CW interference performance of MC-CDMA system can be improved used the MEGC approach.  相似文献   

Sampling Investigation on Inhatitant Domestic Tap Water Consumption Situation and It’s Characteristics Analysis     

FENG Ye-dong  LI Chuan-zhao 《保鲜与加工》2004,(4):154-158

Economics.Through sampling investigation and analysis on inhabitant domestic tap water consumption situation,it is given that economic factors are the main factors influence inhatitant's water consumption.The functional relations among inhabitant's income and water consumption,water price and consumption are given. The tap water's income elasticity of demand and price elasticity of demand is analyzed, along with the fluctuating range month by month of inhabitant's water consumption.Finally ,this paper offers the reference data for planning the ability of water supply and making policies of ladder water prices.  相似文献