With the rising labor cost, energy saving and environmental protection, formwork-free and bracing-free and other fabricated building technologies gradually mature, and the construction market has been promoted from th...With the rising labor cost, energy saving and environmental protection, formwork-free and bracing-free and other fabricated building technologies gradually mature, and the construction market has been promoted from the original government encouragement to the present construction units independent requirements to adopt fabricated practices. Nowadays, many industrial factories and civil frame structures have adopted prefabricated technology. Compared with traditional frame structures, prefabricated buildings have higher requirements in design, production and construction and some problems have been exposed in the process of promotion and implementation which requires us to consider more comprehensively and work more carefully in the design of prefabricated frame structures.展开更多
Electrical automation technology as the internal driving point of ship mechanical equipment operation, especially in the current high-speed development of science and technology, it puts forward higher application req...Electrical automation technology as the internal driving point of ship mechanical equipment operation, especially in the current high-speed development of science and technology, it puts forward higher application requirements for electrical automation technology. In order to effectively ensure the integrity of the implementation of electrical automation technology, it is necessary to define the fusion point of technology and marine electrical system according to the technical attributes. Based on this, this paper takes the basic characteristics of ship electrical automation technology as the breakthrough point, and studies the development and design points of ship electrical automation.展开更多
With the continuous development of modern cities, high-rise buildings have become a beautiful scenery line in the process of urban development, which has greatly improved the utilization rate of land. However, it is p...With the continuous development of modern cities, high-rise buildings have become a beautiful scenery line in the process of urban development, which has greatly improved the utilization rate of land. However, it is precisely because the building height increases, the functions become more complex, and the structural design becomes more and more individual. Therefore, many irregular high-rise buildings keep appearing. Compared with regular buildings, this kind of irregular construction is more prone to structural damage in the event of an earthquake, which puts forward more stringent requirements for designers when designing irregular buildings. Therefore, we analyze and discuss this in detail in this paper.展开更多
In highway engineering, road and bridge are very important components, which can not only provide convenience for people to travel, but also promote the rapid and stable development of regional economy to a large exte...In highway engineering, road and bridge are very important components, which can not only provide convenience for people to travel, but also promote the rapid and stable development of regional economy to a large extent. Under the current technical conditions, the construction of road and bridge foundation is mostly in the form of pile foundation, and the construction quality of pile foundation is directly related to the stability and safety of bridge engineering. Based on this, the paper discusses the design points of bridge pile foundation.展开更多
Integrated wiring system is an important infrastructure in ultra-high-rise buildings. Only by ensuring the rationality of the design of integrated wiring system can the use function of ultra-high-rise buildings be ens...Integrated wiring system is an important infrastructure in ultra-high-rise buildings. Only by ensuring the rationality of the design of integrated wiring system can the use function of ultra-high-rise buildings be ensured. In this paper, the concept of ultra-high-rise building and integrated wiring system is briefly introduced at first, then the importance of integrated wiring system to ultra-high-rise building is clarified, then the design points of integrated wiring system of ultra-high-rise building are analyzed combined with actual projects, and finally the management optimization scheme of integrated wiring system of ultra-high-rise building is discussed.展开更多
With the progress of the building structure design scheme level, compared with the pouring concrete construction building, the prefabricated building structure has made great development.At present, our country is act...With the progress of the building structure design scheme level, compared with the pouring concrete construction building, the prefabricated building structure has made great development.At present, our country is actively promoting the green building structure design planning, requires related engineering construction units to positive independent innovation attitude to improve the current situation of commonly used building structure, with green core concept design building structure, so as to achieve the goal of environmental protection and resource conservation, reasonable processing analysis and the current situation of construction construction, and eventually promote the construction industry to a new direction.展开更多
With the strong support of the state, prefabricated buildings have developed rapidly in recent years, and the number of prefabricated houses is also increasing. Prefabricated buildings, that is, their main components ...With the strong support of the state, prefabricated buildings have developed rapidly in recent years, and the number of prefabricated houses is also increasing. Prefabricated buildings, that is, their main components are prefabricated. Prefabricated components will be produced in the factory in a modular way. After the production is completed, they will be transported to the construction site, and they only need to be hoisted. Assembly can establish the concrete structure of the building and complete the construction of the building. The building will be divided into several units, some of the main components will be prefabricated in the factory, and will be transported to the construction site after the completion of prefabrication, and these components will be assembled and built. The prefabricated building mode is very different from the traditional construction mode. It has many advantages, more green and environmental protection, and adopts industrialized production mode and standardized production. Prefabricated building is the splicing of prefabricated components, which generally needs to reserve corresponding holes and positions for pipelines and equipment.展开更多
Urban water supply and drainage engineering is an important part of urban infrastructure, and reasonable overall planning and design of urban water system has an important impact on the long-term development of the ci...Urban water supply and drainage engineering is an important part of urban infrastructure, and reasonable overall planning and design of urban water system has an important impact on the long-term development of the city. At present, some cities have not implemented complete urban water supply and drainage system planning and design in planning and construction, which has caused increasingly serious water resource waste and pollution problems, seriously restricted the long-term development of urban water supply and drainage system, and also restricted the long-term development of many areas of the city. Therefore, it is necessary to further improve the urban water supply and drainage planning and design, reasonably develop and utilize resources, meet the needs of social and economic development, and fundamentally promote the long-term development of modern cities.展开更多
Suburban sightseeing farm has always been restrained by such problems as focusing on form and visual effect, low design level, poor depth, similarity with others, poor sustainability and so on. This paper proposed maj...Suburban sightseeing farm has always been restrained by such problems as focusing on form and visual effect, low design level, poor depth, similarity with others, poor sustainability and so on. This paper proposed major characteristics of sightseeing farm design based on core connotations of behavior-driven design from the perspective of cognitive psychology. Cases were taken to analyze the design techniques of sightseeing farm, and it was concluded that sightseeing farm design based on behavior-driven perspective should orient to performancebased, refi ned, individualized and participatory from the four perspectives of highlighting functions, deepening the details, stressing originality, and optimizing experience, in order to provide new thoughts for solving existing problems of current sightseeing farm design.展开更多
Compared with traditional cast-in-situ concrete slab culverts,prefabricated reinforced concrete slab culverts can be produced more quickly and has strong quality controllability,strong earthquake resistance,and repeat...Compared with traditional cast-in-situ concrete slab culverts,prefabricated reinforced concrete slab culverts can be produced more quickly and has strong quality controllability,strong earthquake resistance,and repeatability.They will be the primary production method of slab culverts in the future.This article offers a comprehensive review of the design and construction technology associated with prefabricated reinforced concrete slab culverts.The objective is to provide a valuable reference for related enterprises,enhance the quality of design and construction in precast pile configuration,and,in turn,contribute to the advancement of construction projects within our country.展开更多
Conventional reliability-based design optimization （RBDO） requires to use the most probable point （MPP） method for a probabilistic analysis of the reliability constraints. A new approach is presented, called as th...Conventional reliability-based design optimization （RBDO） requires to use the most probable point （MPP） method for a probabilistic analysis of the reliability constraints. A new approach is presented, called as the minimum error point （MEP） method or the MEP based method, for reliability-based design optimization, whose idea is to minimize the error produced by approximating performance functions. The MEP based method uses the first order Taylor＇s expansion at MEP instead of MPP. Examples demonstrate that the MEP based design optimization can ensure product reliability at the required level, which is very imperative for many important engineering systems. The MEP based reliability design optimization method is feasible and is considered as an alternative for solving reliability design optimization problems. The MEP based method is more robust than the commonly used MPP based method for some irregular performance functions.展开更多
With the development of social economy, people's living standard and quality of life are improving day by day, and large-scale commercial buildings are emerging one after another, bringing great convenience to the...With the development of social economy, people's living standard and quality of life are improving day by day, and large-scale commercial buildings are emerging one after another, bringing great convenience to the life of social strata. Large-scale commercial buildings are usually located in urban areas with large flow of people and wide variety of goods. The occurrence of fire safety hazards inevitably poses a serious threat to people's lives and property safety. This paper makes a brief analysis on the fire protection design of large commercial buildings for reference only.展开更多
A kind of three-dimensional flow-path of the ram-rotor was designed in this paper according to the design method of the typical supersonic intake of aircraft and missiles,especially the design method of the compressio...A kind of three-dimensional flow-path of the ram-rotor was designed in this paper according to the design method of the typical supersonic intake of aircraft and missiles,especially the design method of the compression ramp,the throat and the subsonic diffuser.The design Mach number of the flow-path was based on the averaged relative Mach number,regardless of the change of incoming Mach number along radial direction of the flow-path.Then,the flowfield of the designed flow-path was simulated numerically with computational fluid dynamics software at design point.The purpose of simulation was to obtain the details of the flowfield,including the structure of the shock wave system,position of flow separation zone,and so on.The performance of the ram-rotor was also evaluated.The numerical results show the structure of the shock wave system in the flow-path is similar to that in the supersonic intake.To improve the overall performance of the ram-rotor,the reasonable compromise between the total pressure ratio and the isentropic adiabatic efficiency should be reached.The structure optimization of the flow-path and the configuration of the shock wave system have great influence on the performance of the ram-rotor.展开更多
The evaluation of reliability for structural system is important in engineering practices.In this paper,by combining the design point method,JC method,interval analysis theory,and increment load method,we propose a ne...The evaluation of reliability for structural system is important in engineering practices.In this paper,by combining the design point method,JC method,interval analysis theory,and increment load method,we propose a new interval design point method for the reliability of structural systems in which the distribution parameters of random variables are described as interval variables.The proposed method may provide exact probabilistic interval reliability of structures whose random variables can have either a normal or abnormal distribution form.At last,we show the feasibility of the proposed approach through a typical example.展开更多
Suppose that we have a partially linear model Yi = xiβ ＋ g（ti） ＋εi with independent zero mean errors εi, where （xi,ti, i = 1, ... ,n} are non-random and observed completely and （Yi, i = 1,...,n} are missing a...Suppose that we have a partially linear model Yi = xiβ ＋ g（ti） ＋εi with independent zero mean errors εi, where （xi,ti, i = 1, ... ,n} are non-random and observed completely and （Yi, i = 1,...,n} are missing at random（MAR）. Two types of estimators of β and g（t） for fixed t are investigated： estimators based on semiparametric regression and inverse probability weighted imputations. Asymptotic normality of the estimators is established, which is used to construct normal approximation based confidence intervals on β and g（t）. Results are reported of a simulation study on the finite sample performance of the estimators and confidence intervals proposed in this paper.展开更多
This paper presents a novel deep neural network for designated point tracking(DPT)in a monocular RGB video,VideoInNet.More concretely,the aim is to track four designated points correlated by a local homography on a te...This paper presents a novel deep neural network for designated point tracking(DPT)in a monocular RGB video,VideoInNet.More concretely,the aim is to track four designated points correlated by a local homography on a textureless planar region in the scene.DPT can be applied to augmented reality and video editing,especially in the field of video advertising.Existing methods predict the location of four designated points without appropriately considering the point correlation.To solve this problem,VideoInNet predicts the motion of the four designated points correlated by a local homography within the heatmap prediction framework.Our network refines the heatmaps of designated points through two stages.On the first stage,we introduce a context-aware and location-aware structure to learn a local homography for the designated plane in a supervised way.On the second stage,we introduce an iterative heatmap refinement module to improve the tracking accuracy.We propose a dataset focusing on textureless planar regions,named ScanDPT,for training and evaluation.We show that the error rate of VideoInNet is about 29%lower than that of the state-of-the-art approach when testing in the first 120 frames of testing videos on ScanDPT.展开更多
文摘With the rising labor cost, energy saving and environmental protection, formwork-free and bracing-free and other fabricated building technologies gradually mature, and the construction market has been promoted from the original government encouragement to the present construction units independent requirements to adopt fabricated practices. Nowadays, many industrial factories and civil frame structures have adopted prefabricated technology. Compared with traditional frame structures, prefabricated buildings have higher requirements in design, production and construction and some problems have been exposed in the process of promotion and implementation which requires us to consider more comprehensively and work more carefully in the design of prefabricated frame structures.
文摘Electrical automation technology as the internal driving point of ship mechanical equipment operation, especially in the current high-speed development of science and technology, it puts forward higher application requirements for electrical automation technology. In order to effectively ensure the integrity of the implementation of electrical automation technology, it is necessary to define the fusion point of technology and marine electrical system according to the technical attributes. Based on this, this paper takes the basic characteristics of ship electrical automation technology as the breakthrough point, and studies the development and design points of ship electrical automation.
文摘With the continuous development of modern cities, high-rise buildings have become a beautiful scenery line in the process of urban development, which has greatly improved the utilization rate of land. However, it is precisely because the building height increases, the functions become more complex, and the structural design becomes more and more individual. Therefore, many irregular high-rise buildings keep appearing. Compared with regular buildings, this kind of irregular construction is more prone to structural damage in the event of an earthquake, which puts forward more stringent requirements for designers when designing irregular buildings. Therefore, we analyze and discuss this in detail in this paper.
文摘In highway engineering, road and bridge are very important components, which can not only provide convenience for people to travel, but also promote the rapid and stable development of regional economy to a large extent. Under the current technical conditions, the construction of road and bridge foundation is mostly in the form of pile foundation, and the construction quality of pile foundation is directly related to the stability and safety of bridge engineering. Based on this, the paper discusses the design points of bridge pile foundation.
文摘Integrated wiring system is an important infrastructure in ultra-high-rise buildings. Only by ensuring the rationality of the design of integrated wiring system can the use function of ultra-high-rise buildings be ensured. In this paper, the concept of ultra-high-rise building and integrated wiring system is briefly introduced at first, then the importance of integrated wiring system to ultra-high-rise building is clarified, then the design points of integrated wiring system of ultra-high-rise building are analyzed combined with actual projects, and finally the management optimization scheme of integrated wiring system of ultra-high-rise building is discussed.
文摘With the progress of the building structure design scheme level, compared with the pouring concrete construction building, the prefabricated building structure has made great development.At present, our country is actively promoting the green building structure design planning, requires related engineering construction units to positive independent innovation attitude to improve the current situation of commonly used building structure, with green core concept design building structure, so as to achieve the goal of environmental protection and resource conservation, reasonable processing analysis and the current situation of construction construction, and eventually promote the construction industry to a new direction.
文摘With the strong support of the state, prefabricated buildings have developed rapidly in recent years, and the number of prefabricated houses is also increasing. Prefabricated buildings, that is, their main components are prefabricated. Prefabricated components will be produced in the factory in a modular way. After the production is completed, they will be transported to the construction site, and they only need to be hoisted. Assembly can establish the concrete structure of the building and complete the construction of the building. The building will be divided into several units, some of the main components will be prefabricated in the factory, and will be transported to the construction site after the completion of prefabrication, and these components will be assembled and built. The prefabricated building mode is very different from the traditional construction mode. It has many advantages, more green and environmental protection, and adopts industrialized production mode and standardized production. Prefabricated building is the splicing of prefabricated components, which generally needs to reserve corresponding holes and positions for pipelines and equipment.
文摘Urban water supply and drainage engineering is an important part of urban infrastructure, and reasonable overall planning and design of urban water system has an important impact on the long-term development of the city. At present, some cities have not implemented complete urban water supply and drainage system planning and design in planning and construction, which has caused increasingly serious water resource waste and pollution problems, seriously restricted the long-term development of urban water supply and drainage system, and also restricted the long-term development of many areas of the city. Therefore, it is necessary to further improve the urban water supply and drainage planning and design, reasonably develop and utilize resources, meet the needs of social and economic development, and fundamentally promote the long-term development of modern cities.
文摘Suburban sightseeing farm has always been restrained by such problems as focusing on form and visual effect, low design level, poor depth, similarity with others, poor sustainability and so on. This paper proposed major characteristics of sightseeing farm design based on core connotations of behavior-driven design from the perspective of cognitive psychology. Cases were taken to analyze the design techniques of sightseeing farm, and it was concluded that sightseeing farm design based on behavior-driven perspective should orient to performancebased, refi ned, individualized and participatory from the four perspectives of highlighting functions, deepening the details, stressing originality, and optimizing experience, in order to provide new thoughts for solving existing problems of current sightseeing farm design.
文摘Compared with traditional cast-in-situ concrete slab culverts,prefabricated reinforced concrete slab culverts can be produced more quickly and has strong quality controllability,strong earthquake resistance,and repeatability.They will be the primary production method of slab culverts in the future.This article offers a comprehensive review of the design and construction technology associated with prefabricated reinforced concrete slab culverts.The objective is to provide a valuable reference for related enterprises,enhance the quality of design and construction in precast pile configuration,and,in turn,contribute to the advancement of construction projects within our country.
基金This project is supported by National Natural Science Foundation of China(No.50575072)Outstanding Youth Fund of Hunan Education Department, China (No.04B007).
文摘Conventional reliability-based design optimization （RBDO） requires to use the most probable point （MPP） method for a probabilistic analysis of the reliability constraints. A new approach is presented, called as the minimum error point （MEP） method or the MEP based method, for reliability-based design optimization, whose idea is to minimize the error produced by approximating performance functions. The MEP based method uses the first order Taylor＇s expansion at MEP instead of MPP. Examples demonstrate that the MEP based design optimization can ensure product reliability at the required level, which is very imperative for many important engineering systems. The MEP based reliability design optimization method is feasible and is considered as an alternative for solving reliability design optimization problems. The MEP based method is more robust than the commonly used MPP based method for some irregular performance functions.
文摘With the development of social economy, people's living standard and quality of life are improving day by day, and large-scale commercial buildings are emerging one after another, bringing great convenience to the life of social strata. Large-scale commercial buildings are usually located in urban areas with large flow of people and wide variety of goods. The occurrence of fire safety hazards inevitably poses a serious threat to people's lives and property safety. This paper makes a brief analysis on the fire protection design of large commercial buildings for reference only.
基金Supported by National High-tech R&D Program(2007AA05Z255)
文摘A kind of three-dimensional flow-path of the ram-rotor was designed in this paper according to the design method of the typical supersonic intake of aircraft and missiles,especially the design method of the compression ramp,the throat and the subsonic diffuser.The design Mach number of the flow-path was based on the averaged relative Mach number,regardless of the change of incoming Mach number along radial direction of the flow-path.Then,the flowfield of the designed flow-path was simulated numerically with computational fluid dynamics software at design point.The purpose of simulation was to obtain the details of the flowfield,including the structure of the shock wave system,position of flow separation zone,and so on.The performance of the ram-rotor was also evaluated.The numerical results show the structure of the shock wave system in the flow-path is similar to that in the supersonic intake.To improve the overall performance of the ram-rotor,the reasonable compromise between the total pressure ratio and the isentropic adiabatic efficiency should be reached.The structure optimization of the flow-path and the configuration of the shock wave system have great influence on the performance of the ram-rotor.
基金supported by the Postdoctoral Science Foundation of China(Grant No.2013M531239)
文摘The evaluation of reliability for structural system is important in engineering practices.In this paper,by combining the design point method,JC method,interval analysis theory,and increment load method,we propose a new interval design point method for the reliability of structural systems in which the distribution parameters of random variables are described as interval variables.The proposed method may provide exact probabilistic interval reliability of structures whose random variables can have either a normal or abnormal distribution form.At last,we show the feasibility of the proposed approach through a typical example.
基金Supported by the National Natural Science Foundation of China(No.11271088,11361011,11201088)Guangxi"Bagui Scholar"Special Project Foundationthe Natural Science Foundation of Guangxi(No.2013GXNS-FAA019004,2013GXNSFAA019007,2013GXNSFBA019001)
文摘Suppose that we have a partially linear model Yi = xiβ ＋ g（ti） ＋εi with independent zero mean errors εi, where （xi,ti, i = 1, ... ,n} are non-random and observed completely and （Yi, i = 1,...,n} are missing at random（MAR）. Two types of estimators of β and g（t） for fixed t are investigated： estimators based on semiparametric regression and inverse probability weighted imputations. Asymptotic normality of the estimators is established, which is used to construct normal approximation based confidence intervals on β and g（t）. Results are reported of a simulation study on the finite sample performance of the estimators and confidence intervals proposed in this paper.
基金the Key Research Projects of the Foundation Strengthening Program under Grant No.2020JCJQZD01412the National Natural Science Foundation of China under Grant No.61832016.
文摘This paper presents a novel deep neural network for designated point tracking(DPT)in a monocular RGB video,VideoInNet.More concretely,the aim is to track four designated points correlated by a local homography on a textureless planar region in the scene.DPT can be applied to augmented reality and video editing,especially in the field of video advertising.Existing methods predict the location of four designated points without appropriately considering the point correlation.To solve this problem,VideoInNet predicts the motion of the four designated points correlated by a local homography within the heatmap prediction framework.Our network refines the heatmaps of designated points through two stages.On the first stage,we introduce a context-aware and location-aware structure to learn a local homography for the designated plane in a supervised way.On the second stage,we introduce an iterative heatmap refinement module to improve the tracking accuracy.We propose a dataset focusing on textureless planar regions,named ScanDPT,for training and evaluation.We show that the error rate of VideoInNet is about 29%lower than that of the state-of-the-art approach when testing in the first 120 frames of testing videos on ScanDPT.
