检索结果-南通市图书馆

IMPROVED FRAME-BRACE MODEL OF CONCRETE SHEAR WALL

在线全文

cnki会议

学校读者我要写书评

暂无评论

IMPROVED FRAME-BRACE MODEL OF CONCRETE SHEAR WALL

The 3rd International Conference on the Concrete Future

作者： Weirong Lǖ~* Hunan university of Science and technology Xiangtan and central south university of forestry and technology changsha china Xijun LIU Hunan university of Science and technology Xiangtan china Chuxian SHI Hunan university changsha china

＜正＞By changing the number of basic frame-brace unit,the improved frame-brace model can have equal elastic flexural,shear and axial stiffness with concrete shear wall,and be suitable to simulate concrete shear wall of different height-width ratio of *** results of computer simulation analysis have showed that the improved frame-brace model could be used to effectively analyze the elastic-plastic deformation of reinforced masonry concrete shear wall structures under earthquake by setting the reasonable plastic hinges at proper location.

关键词： improved frame-brace model shear wall height-width ratio of floor plastic hinges

在线全文

cnki会议

学校读者我要写书评

暂无评论

对若干采矿方法数值优选法的评价与优选

湘潭矿业学院学报 2000年第3期15卷 7-11页

作者：吴爱祥张卫锋中南大学资源环境与建筑工程学院湖南长沙410083

数值优选法是对采矿方法进行选择时的重要工具从正反两个方面对目前几个比较流行的采矿方法数值优选法进行了客观地分析和评价 ;结合它们各自的特点 ,对多目标模糊决策法和双基点法进行了适当地改进 ;通过实例验证 ,推荐了改进的多目... 详细信息

数值优选法是对采矿方法进行选择时的重要工具从正反两个方面对目前几个比较流行的采矿方法数值优选法进行了客观地分析和评价 ;结合它们各自的特点 ,对多目标模糊决策法和双基点法进行了适当地改进 ;通过实例验证 ,推荐了改进的多目标模糊决策法、相似率优选法等几个较为优良的方法 ,为选用合适的采矿方法数值优选法提供了有价值的参考意见参

关键词：采矿方法数值优选多目标模糊决策法双基点法

Study on the Supramolecular interaction of Curcumin and P-Cyclodextrin

在线全文

学校读者我要写书评

暂无评论

Study on the Supramolecular interaction of Curcumin and P-Cy...

第九届中国林业青年学术年会

作者： Chun- tao Kuang Xiang-zhou Li Hai-peng Xue Qiang Su Yuan-liang Guo (college of Material Science and engineering,central south university of forestry and technology,changsha 410004, People''s Republic of china)

The inclusion complex formation of curcumin with B-CD was studied by spectrophotometry, and the apparent formation constant for curcumin-p-CD complex was *** stiochiometric ratio of curcumin-P-CD complex was investigated by Job’s continuous variation *** results showed that a 1:1 complex between curcumin and P-CD was formed,and the apparent formation constants decreased with the increase of reaction *** thermodynamic parameters,standard free energy（AG°）,enthalpy（AH°） and entropy（AS°） for complex formation of curcumin with p-CD were *** inclusion complex was confirmed by infrared spectrum（IR） and thermogravimetric analysis（TGA）.

关键词： curcumin β-cyclodextrin inclusion complex apparent formation constant spectrophotometry thermodynamic parameter

在线全文

cnki会议

学校读者我要写书评

暂无评论

扬子地台西缘富碱斑岩特征及成矿专属性

中南工业大学学报 1996年第2期27卷 129-131页

作者：胡祥昭中南工业大学资源环境与建筑工程学院

扬子地台西缘富碱斑岩的年龄为３０～５０Ｍａ，矿物成分主要由正长石、石英、斜长石组成，化学成分富碱［ω（Ｋ２Ｏ＋Ｎａ２Ｏ）＞８％］、高钾［ω（Ｋ２Ｏ）为５．０９％～８．３０％］，ΣＲＥＥ含量较低，ＬＲＥＥ富集，无铕异常... 详细信息

扬子地台西缘富碱斑岩的年龄为３０～５０Ｍａ，矿物成分主要由正长石、石英、斜长石组成，化学成分富碱［ω（Ｋ２Ｏ＋Ｎａ２Ｏ）＞８％］、高钾［ω（Ｋ２Ｏ）为５．０９％～８．３０％］，ΣＲＥＥ含量较低，ＬＲＥＥ富集，无铕异常，８７Ｓｒ／８６Ｓｒ初始平均比值为０．７０７３，δ３４Ｓ值接近陨石硫，铅同位素比值接近上地慢铅的相应同位素比值，成矿主要属铜、钼、金、银、铅、锌多金属矿化及稀有稀土金属矿化．

关键词：岩石学地球化学富碱斑岩成矿斑岩

Parameter Optimization for Main Driving Speed Control System of Temper Mill

在线全文

学校读者我要写书评

暂无评论

Parameter Optimization for Main Driving Speed Control System...

2010 Chinese Control and Decision Conference

作者： Lanjun Li~1,Xiangzhong Wang~2 1.School of Electrical engineering,university of south china,Hengyang,421001 2.college of Computer and Information engineering, central south university of forestry and technology,changsha,410014

＜正＞In main driving speed control system of temper mill,there are many adjustable parameters,their tuning ranges are wide,the parameters robustness are bad,and it is hard to find a set of control parameters which operate system under optimal condition with traditional parameter tuning *** order to solve these problems,this paper puts forward an optimal setting method of control parameters based on evolution *** searching method with proper coding form,adaption function and other evolutionary operator is efficient and *** method is applied to parameter optimization of main driving speed control system of temper mill,and the system performance characteristics such as the most overshoot,response speed and accuracy turn out to be optimal.

关键词： Temper mill Parameter setting Evolution algorithm Optimization

NEURAL NETWORK ASSESSMENT OF ROCKBURST RISKS FOR DEEP GOLD MINES IN south AFRICA

在线全文

cnki会议

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1998年第2期8卷 160-166页

作者： Feng Xiatingcollege of Resources and civil engineering,Northeastern university, Shenyang 110006, P. R. chinaS. WebberCSIR Mining technology, Johannesburg, south AfricaM. U. OzbayDepartment of Mining engineering,university of the Witwatersr

ＮＥＵＲＡＬＮＥＴＷＯＲＫＡＳＳＥＳＳＭＥＮＴＯＦＲＯＣＫＢＵＲＳＴＲＩＳＫＳＦＯＲＤＥＥＰＧＯＬＤＭＩＮＥＳＩＮＳＯＵＴＨＡＦＲＩＣＡ①ＦｅｎｇＸｉａｔｉｎｇＣｏｌｅｇｅｏｆＲｅｓｏｕｒｃｅｓａｎｄＣｉｖｉｌＥｎｇ... 详细信息

ＮＥＵＲＡＬＮＥＴＷＯＲＫＡＳＳＥＳＳＭＥＮＴＯＦＲＯＣＫＢＵＲＳＴＲＩＳＫＳＦＯＲＤＥＥＰＧＯＬＤＭＩＮＥＳＩＮＳＯＵＴＨＡＦＲＩＣＡ①ＦｅｎｇＸｉａｔｉｎｇＣｏｌｅｇｅｏｆＲｅｓｏｕｒｃｅｓａｎｄＣｉｖｉｌＥｎｇｉｎｅｒｉｎｇ，Ｎｏｒｔｈｅａｓｔ...

关键词： neural network rockburst risk south Africa

EFFECT OF CRACK-STOPPING HOLE ON SHEAR FRACTURE OF ROCK

在线全文

学校读者我要写书评

暂无评论

EFFECT OF CRACK-STOPPING HOLE ON SHEAR FRACTURE OF ROCK

The 7th International Symposium on Rockburst and Seismicity in Mines(RaSiM7)

作者： QIUHUA RAO,HAIFENG XIE,QIANG XIE,ZHI WANG college of civil engineering and Architecture,central south university changsha,Hunan,410083,P.R.china

Effect of crack-stopping hole on shear(ModeⅡ) fracture of rock is studied numerically and *** element method through the displacement approach is used to calculate the shear stress intensity factors of the specimens with and without symmetrical double holes,Kand K Shear-box test and new electrometric method with conductive glue are adopted to measure the maximum shear stress intensity factor(K),stable shear crack propagation rate(V) and time(T) of these specimens in order to find out optimal double holes for shear crack-stopping. Results show that the effect of crack-stopping hole on shear fracture of rock specimen depends on its location and size,which can be denoted by a regression equation about the ratio of K/K and the three parameters, radius(R),distance away from the notch tip(L) and distance between the two holes(S).The more the R and L,the larger the K/K and the easier to fracture the rock ***,the more the 5,the smaller the K/K and the more difficult to propagate the shear *** R and L are the smallest and S is the largest,the specimen with double holes has the largest values of K and T and the smallest value of V,which is most favourable to shear crack-preventing. Adding optimal double holes symmetrical with respect to the original crack plane is an effective method for shear crack arresting of brittle rock.

关键词：

在线全文

cnki会议

学校读者我要写书评

暂无评论

大米淀粉物理性质研究进展

食品科技 2010年第11期35卷 249-253页

作者：周丽君林亲录符琼中南林业科技大学食品科学与工程学院长沙410004

对大米淀粉的结构和组成及其主要物理性质进行了综述。较全面地概述了大米淀粉的糊化特性、流变特性以及热力学特性;同时,比较了不同品种的大米淀粉在物性上的差异并分析了其影响因素。

关键词：大米淀粉结构和组成糊化特性流变特性热力学特性

Study and Experiment of Fire Damaged RC Beams Retrofitted with CFRP

在线全文

学校读者我要写书评

暂无评论

Study and Experiment of Fire Damaged RC Beams Retrofitted wi...

2004安全科学与技术国际会议

作者： TIAN Mingge1 ZOU Yinsheng1 YI Weijian1 XU Zhisheng2 & OUYANG Zhenyu2 (1 college of civil engineering Hunan university changsha 410082 Hunan china) (2 college of civil engineering and Architecture central south university changsha 410075 Hunan china)

In this paper, the performance of fire damaged RC beams retrofitted with CFRP is studied, and the experiments are carried out to validate its rationality and feasibility. The structural damage due to

关键词： fire displacement damage CFRP retrofit