In order to improve the safety of the battery of satellite side mounting,and prevent the screw from producing excess due to frequent assembly and disassembly,the YS-20 material replacement and structure optimization d...In order to improve the safety of the battery of satellite side mounting,and prevent the screw from producing excess due to frequent assembly and disassembly,the YS-20 material replacement and structure optimization design of the screw body are carried out under the premise of not changing the original tooling.The double⁃shear test of YS-20 bar is carried out,and the ANSYS optimization design module is used to design 7×7×6,a total of 294,calculation cases of D1,D2,T,the three important dimension parameters of screw structure.The actual bearing state of screw composite structure is accurately simulated by using asymmetric contact model.Three comprehensive evaluations are established,and the calculation examples satisfying the conditions are evaluated comprehensively.The final results are T=12.2 mm,D1=16 mm,D2=2 mm.The stress verification and contact analysis are carried out for the final scheme and the bearing state and contact state optimized screw structure are obtained.展开更多
s: Regarding the influencing factors in an optimal selection of pipeline design alternative as fuzzy variables with different weights, a fuzzy comprehensive assessment was applied to an optimal selection of the design...s: Regarding the influencing factors in an optimal selection of pipeline design alternative as fuzzy variables with different weights, a fuzzy comprehensive assessment was applied to an optimal selection of the design alternative. Giving the Lanzhou-Chengdu pipeline as an example to explain the process, the result shows that this method is acceptable.展开更多
With the acceleration of urbanization, city complex as an intensive urban organization form has gradually grown up in China. By consulting relevant documents of city complex, emergence background and related concepts ...With the acceleration of urbanization, city complex as an intensive urban organization form has gradually grown up in China. By consulting relevant documents of city complex, emergence background and related concepts of city complex were introduced, landscape design of Chenglong-International was analyzed to propose landscape design principles and concepts of city complex under the compound development model, landscape processing techniques of outdoor functional subareas and transitional areas were introduced to provide useful reference for the landscape design of city complex.展开更多
By investigating Lazikou Scenic Area, consulting a great deal of theoretical materials and data of other cases, landscape planning and design techniques for Zhuligou Comprehensive Service Area were proposed, and envir...By investigating Lazikou Scenic Area, consulting a great deal of theoretical materials and data of other cases, landscape planning and design techniques for Zhuligou Comprehensive Service Area were proposed, and environmental planning and design of red tourist areas explored effectively, so as to promote to the development of red tourism and traditional revolutionary education, and also the harmonious socio-economic development of old revolutionary bases.展开更多
In order to inspect the good and reliability of automated charging station’s lightning protection design in airport, we set the comprehensive evaluation mathematical model of automated charging station in the airport...In order to inspect the good and reliability of automated charging station’s lightning protection design in airport, we set the comprehensive evaluation mathematical model of automated charging station in the airport, through the method of second order fuzzy comprehensive evaluation and evaluate the automated charging station’s lightning protection design comprehensively by using the assessment data of expert database.展开更多
Urban construction in China has changed from“extensional sprawl”to“connotative development”.With the accelerating urbanization and improvement of living standards,citizens have had higher and more requirements on ...Urban construction in China has changed from“extensional sprawl”to“connotative development”.With the accelerating urbanization and improvement of living standards,citizens have had higher and more requirements on urban waterfront spaces.Starting from the history and characteristics of comprehensive river regulation,this paper explored its multiple meanings against the new appeals of urban development.On this basis,design and planning approaches were discussed from 3 perspectives of waterfront space planning control,waterfront space design optimization,and improvement of waterfront landscape,then the planning and design strategies of urban waterfront spaces were explored by studying the comprehensive waterfront space regulation project of the Old Huan River in Hubei,so as to provide references for the comprehensive water system regulation and space planning and construction of urban waterfront spaces.展开更多
The subway has become an dominant form for public transportation in all the great metropolis. It not only saves energy and time ,but also relieves stress caused by the dense commuting. As a high-effi cient travel mode...The subway has become an dominant form for public transportation in all the great metropolis. It not only saves energy and time ,but also relieves stress caused by the dense commuting. As a high-effi cient travel mode in modern city, the metro can not only relieve the ground traffi c pressure, but also represents the culture and value of the city, which is the essence of our life. Metro visual communication design of developed countries in the world is almost closely related to the origin of urban culture, then the metro culture with local specialties has been formed. Therefore, comparative research on the situation of metro visual communication design both can induce the integration and regeneration of urban metro visual communication design and urban culture of China, as well as the formation and development of the metro culture.展开更多
The current AASHTO load and resistance factor design （LRFD） guidelines are formulated based on bridge reliability, which interprets traditional design safety factors into more rigorously deduced factors based on the...The current AASHTO load and resistance factor design （LRFD） guidelines are formulated based on bridge reliability, which interprets traditional design safety factors into more rigorously deduced factors based on the theory of probability. This is a major advancement in bridge design specifications. However, LRFD is only calibrated for dead and live loads. In cases when extreme loads are significant, they need to be individually assessed. Combining regular loads with extreme loads has been a major challenge, mainly because the extreme loads are time variables and cannot be directly combined with time invariant loads to formulate the probability of structural failure. To overcome these difficulties, this paper suggests a methodology of comprehensive reliability, by introducing the concept of partial failure probability to separate the loads so that each individual load combination under a certain condition can be approximated as time invariant. Based on these conditions, the extreme loads （also referred to as multiple hazard or MH loads） can be broken down into single effects. In Part II of this paper, a further breakdown of these conditional occurrence probabilities into pure conditions is discussed by using a live truck and earthquake loads on a bridge as an example. There are three major steps in establishing load factors from MH load distributions： （1） formulate the failure probabilities; （2） normalize various load distributions; and （3） establish design limit state equations. This paper describes the formulation of the failure probabilities of single and combined loads.展开更多
Successful completion of the landscape design work, the implementation on-site is very important besides the prophase design. While in the process of project implementation, what plays an important role is the relatio...Successful completion of the landscape design work, the implementation on-site is very important besides the prophase design. While in the process of project implementation, what plays an important role is the relationship between persons to persons and persons to things, but not just a simple drawing on the paper. This paper summarized some aspects of project implementation of the NOd Xiangjiang in Changsha, and hopes to achieve the designer＇ s desired results when the landscaping project is completed.展开更多
Reading competence is one of the basic skills of language acquisition.The teaching of reading skill has been attached great importance to in College English education in China.For decades,people have made efforts to i...Reading competence is one of the basic skills of language acquisition.The teaching of reading skill has been attached great importance to in College English education in China.For decades,people have made efforts to improve the classroom teaching effects through various means,one of which is that of communicative approach.This paper attempts to explore the design of reading comprehension exercise through a case study in the light of communicative theory,thus providing an alternative to the conventional reading course teaching method.展开更多
文摘In order to improve the safety of the battery of satellite side mounting,and prevent the screw from producing excess due to frequent assembly and disassembly,the YS-20 material replacement and structure optimization design of the screw body are carried out under the premise of not changing the original tooling.The double⁃shear test of YS-20 bar is carried out,and the ANSYS optimization design module is used to design 7×7×6,a total of 294,calculation cases of D1,D2,T,the three important dimension parameters of screw structure.The actual bearing state of screw composite structure is accurately simulated by using asymmetric contact model.Three comprehensive evaluations are established,and the calculation examples satisfying the conditions are evaluated comprehensively.The final results are T=12.2 mm,D1=16 mm,D2=2 mm.The stress verification and contact analysis are carried out for the final scheme and the bearing state and contact state optimized screw structure are obtained.
文摘s: Regarding the influencing factors in an optimal selection of pipeline design alternative as fuzzy variables with different weights, a fuzzy comprehensive assessment was applied to an optimal selection of the design alternative. Giving the Lanzhou-Chengdu pipeline as an example to explain the process, the result shows that this method is acceptable.
文摘With the acceleration of urbanization, city complex as an intensive urban organization form has gradually grown up in China. By consulting relevant documents of city complex, emergence background and related concepts of city complex were introduced, landscape design of Chenglong-International was analyzed to propose landscape design principles and concepts of city complex under the compound development model, landscape processing techniques of outdoor functional subareas and transitional areas were introduced to provide useful reference for the landscape design of city complex.
文摘By investigating Lazikou Scenic Area, consulting a great deal of theoretical materials and data of other cases, landscape planning and design techniques for Zhuligou Comprehensive Service Area were proposed, and environmental planning and design of red tourist areas explored effectively, so as to promote to the development of red tourism and traditional revolutionary education, and also the harmonious socio-economic development of old revolutionary bases.
文摘In order to inspect the good and reliability of automated charging station’s lightning protection design in airport, we set the comprehensive evaluation mathematical model of automated charging station in the airport, through the method of second order fuzzy comprehensive evaluation and evaluate the automated charging station’s lightning protection design comprehensively by using the assessment data of expert database.
基金Cross Exploration Project Funded by Basic Research Expenses of the Central Universities(DUT19JC55)Dalian Innovation Support Program for High-end Talents(2017RQ076).
文摘Urban construction in China has changed from“extensional sprawl”to“connotative development”.With the accelerating urbanization and improvement of living standards,citizens have had higher and more requirements on urban waterfront spaces.Starting from the history and characteristics of comprehensive river regulation,this paper explored its multiple meanings against the new appeals of urban development.On this basis,design and planning approaches were discussed from 3 perspectives of waterfront space planning control,waterfront space design optimization,and improvement of waterfront landscape,then the planning and design strategies of urban waterfront spaces were explored by studying the comprehensive waterfront space regulation project of the Old Huan River in Hubei,so as to provide references for the comprehensive water system regulation and space planning and construction of urban waterfront spaces.
文摘The subway has become an dominant form for public transportation in all the great metropolis. It not only saves energy and time ,but also relieves stress caused by the dense commuting. As a high-effi cient travel mode in modern city, the metro can not only relieve the ground traffi c pressure, but also represents the culture and value of the city, which is the essence of our life. Metro visual communication design of developed countries in the world is almost closely related to the origin of urban culture, then the metro culture with local specialties has been formed. Therefore, comparative research on the situation of metro visual communication design both can induce the integration and regeneration of urban metro visual communication design and urban culture of China, as well as the formation and development of the metro culture.
基金Federal Highway Administration at the University at Buffalo Under Contract Number DTFH61-08-C-00012
文摘The current AASHTO load and resistance factor design （LRFD） guidelines are formulated based on bridge reliability, which interprets traditional design safety factors into more rigorously deduced factors based on the theory of probability. This is a major advancement in bridge design specifications. However, LRFD is only calibrated for dead and live loads. In cases when extreme loads are significant, they need to be individually assessed. Combining regular loads with extreme loads has been a major challenge, mainly because the extreme loads are time variables and cannot be directly combined with time invariant loads to formulate the probability of structural failure. To overcome these difficulties, this paper suggests a methodology of comprehensive reliability, by introducing the concept of partial failure probability to separate the loads so that each individual load combination under a certain condition can be approximated as time invariant. Based on these conditions, the extreme loads （also referred to as multiple hazard or MH loads） can be broken down into single effects. In Part II of this paper, a further breakdown of these conditional occurrence probabilities into pure conditions is discussed by using a live truck and earthquake loads on a bridge as an example. There are three major steps in establishing load factors from MH load distributions： （1） formulate the failure probabilities; （2） normalize various load distributions; and （3） establish design limit state equations. This paper describes the formulation of the failure probabilities of single and combined loads.
文摘Successful completion of the landscape design work, the implementation on-site is very important besides the prophase design. While in the process of project implementation, what plays an important role is the relationship between persons to persons and persons to things, but not just a simple drawing on the paper. This paper summarized some aspects of project implementation of the NOd Xiangjiang in Changsha, and hopes to achieve the designer＇ s desired results when the landscaping project is completed.
文摘Reading competence is one of the basic skills of language acquisition.The teaching of reading skill has been attached great importance to in College English education in China.For decades,people have made efforts to improve the classroom teaching effects through various means,one of which is that of communicative approach.This paper attempts to explore the design of reading comprehension exercise through a case study in the light of communicative theory,thus providing an alternative to the conventional reading course teaching method.
