45阶Kirkman三连系的构造与计数     

侴万禧 《长江大学学报》2007,4(4):33-35

给出了边矩阵和完全三分图的定义,提出了利用边矩阵、完全三分图构造45阶Kirkman三连系的思路。介绍了不同构的45阶Kirkman三连系构造的全过程,讨论了45阶Kirkman三连系的计数。  相似文献   

欧盟食品动物注射部位兽药残留指南概述     

孙雷 《中国兽药杂志》2023,57(1):50-56

2022年3月25日,欧盟药品管理局(EMA)兽医药品委员会(CVMP)发布了食品动物注射部位兽药残留指南,并于2022年8月1日正式生效。该指南代替旧版的注射部位兽药残留指南(EMA/CVMP/542/03-FINAL)。本文就新发布指南的背景、适用范围、法律依据、评价方法、残留研究及相关定义等内容进行介绍。  相似文献   

新农村建设中创新农业综合开发科技推广工作的几点思考     

刘建  王军 《农机具之友》2007,(5)

科技推广作为农业综合开发土地治理项目的一项重要措施,应全面融入于项目区的整体建设之中。必须正确把握国家农业综合开发科技推广的特征与要求,实现思维定势上的创新;国家把解决“三农”问题放在各项战略任务的首位,强调坚持统筹城乡经济社会发展,扎实推进社会主义新农村建设。必须正确理解和准确把握社会主义新农村建设的内涵,实现科技推广工作中技术构建上的创新;同时要正确把握农村现实状况,实现运行机制上的创新。  相似文献   

Measurement and Analysis of Prestressed Concrete Flat Beam- Waffle Slab System During Prestressing     

WANG Wei  SU Xiao- zu  ZHAO Yong 《保鲜与加工》2006,(3):63-66

During the pre - stressing of the unbonded prestressed concrete wide flat beam - waffle slab system, the displacements and strains of slab and the prestressed concrete beams were site - measured and the results were analyzed. The prestressing construction was simulated by finite element program. The prestressing efficiency of the unbonded prestressed concrete wide flat beam - waffle slab system was discussed. It indicates that the prestressing efficiency was affected by the in -plane stiffness of slab.  相似文献   

Analysis of Measurement Items Composition under Bills Pricing Mode     

WANG Qun  WU Gang 《保鲜与加工》2005,(5):134-136

This paper analyzes contractor's pricing connotation during bidding period with the implementation of National Standard GB50500-2003 and publish of document JB \206,expatiates the contents of measurements during construction period.Considering the problems derived from expenses of measurements during accounts settlement stage,a classified management method according to the characteristics of these measurements is put forward,and one step further,the rational pricing method of measurement items during the bidding period is suggested.  相似文献   

CAD Environment for Quoting Utility Boiler Based the Characteristic Construction     

ZHANG Yi  LIU Jian -hu  GUO Gang  XU Zong -jun  LIU Lin -juan 《保鲜与加工》2002,(7):137-139

The authors discuss such questions for utility boiler as the complicated flameworks,combined quoting course, long cycle, hardly controlling the quoting veracity and so on. Based on the construction diagram of quoting design for utility boiler, Which is into the boiler sketch's construction and parameter characteristic. They are furnace construction, big screen superheater, high temperature superheater, low temperature superheater, high temperature reheater, low temperature reheater, economy coal implement, common use sign and standard sketch in boiler sketch, etc. According to demand of the quote design for utility boiler, the CAD environment of quoting system based on characteristic construction and parameter are developed. Total construction of this environment , developing characteristics and function of this system are given.  相似文献   

Research on the System and Models of Society-Economy-Environment Appraisal for Construction Project     

FENG Wei-min~ 《保鲜与加工》2004,(6):103-108

The society-economy-environment appraisal for construction project can help our government to control macro-economy, make correlation policy and formulate laws and draw up city plan.It has great influence on the sustainable development of our society and it is the demand of the law for the environment evaluation in China.This paper introduced the basic structure of society-economy-environment appraisal system for construction project and the thought of elements transaction.Using the method of AHP, the model of project analyzing and optimizing selection is designed.For the more, the methods of the optimizing models on the selected schemes are put forward.Finally, the integrative analysis has been made on the system design and appliance of this appraisal system.  相似文献   

Slab Defect Diagnosis and Predicting System Based on Rough Set Theory     

CAO Long-han  SUN Ying-kai  CAO Chang-xiu 《保鲜与加工》2001,(1):95-98

In accordance with the special characteristics of state medium-sized construction enterprises and their reform objects of "having a free hand and enlivening", the suitable objective model, the stock cooperative system for state medium-sized construction enterprises has been put forward in this paper by analyzing the system mechanism of stock cooperative system enterprises. Then the causes for it were expounded.  相似文献   

TARGET ANALYSIS AND EVALUATION MODELS ON SCIENCE-TECHNIC PROGRESS AT THE CONSTRUCTION ENTERPRISE     

Xiao Weipin 《保鲜与加工》1994,(1)

This paper presents some problems that is important part of the desision supportsystem on science-technic progress management at the construction enterprise and discusses targetsystems and evaluation models of synthesis effects on science-technic grogress at the sonstruction en-terprise,and some problem are illustrated and analysed further.  相似文献   

Construction Technology for Pre-stressed Anchor-Rope in Buttressed Retaining Wall     

《保鲜与加工》2003,(1):109-112

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