Quality engineers play a key role in software product development,covering various stages such as requirements analysis,design,coding,testing,and delivery.Its responsibilities include formulating quality standards,wri...Quality engineers play a key role in software product development,covering various stages such as requirements analysis,design,coding,testing,and delivery.Its responsibilities include formulating quality standards,writing test cases,conducting functional and performance tests,and optimizing the product based on feedback.In government procurement projects,quality evaluation focuses on process compliance,security,and functional compatibility.KPI evaluation trees are commonly used for quantitative assessment,and a dynamic adjustment mechanism for indicators needs to be established to cope with complex demands.In addition,risk-driven testing and agile development should be combined to set up quality access control to ensure that each iteration version meets expectations.The multi-dimensional quality assurance and verification scoring mechanism can effectively enhance product reliability and reduce project risks.展开更多
The model of the differential steering system(DSS) of electric vehicle with motorized wheels and the three-degree-of-freedom dynamic model of vehicle are built.Based on these models,the concepts and quantitative expre...The model of the differential steering system(DSS) of electric vehicle with motorized wheels and the three-degree-of-freedom dynamic model of vehicle are built.Based on these models,the concepts and quantitative expressions of steering road feel,steering portability and steering stability are proposed.Through integrating the Monte Carlo descriptive sampling,elitist non-dominated sorting genetic algorithm(NSGA-II) and Taguchi robust design method,the system parameters are optimized with steering road feel and steering portability as optimization targets,and steering stability and steering portability as constraints.The simulation results show that the system optimized based on quality engineering can improve the steering road feel,guarantee steering stability and steering portability and thus provide a theoretical basis for the design and optimization of the electric vehicle with motorized wheels system.展开更多
The article analysis of construction surface decoration quality, construction interior wall decoration quality, the construction of exterior wall tile adhesive quality and construction of aluminium alloy exterior qual...The article analysis of construction surface decoration quality, construction interior wall decoration quality, the construction of exterior wall tile adhesive quality and construction of aluminium alloy exterior quality problems, and points out the corresponding prevention measures on the problem. Finally, for wall cracks, the paper put forward the improvement measures.展开更多
Knowledge graph technology play a more and more important role in various fields of industry and academia.This paper firstly introduces the general framework of the knowledge graph construction,which includes three st...Knowledge graph technology play a more and more important role in various fields of industry and academia.This paper firstly introduces the general framework of the knowledge graph construction,which includes three stages:information extraction,knowledge fusion and knowledge processing.In order to improve the efficiency of quality and safety supervision of transportation engineering construction,this paper constructs a knowledge graph by acquiring multi-sources heterogeneous data from supervision of transportation engineering quality and safety.It employs a bottom-up construction strategy and some natural language processing methods to solve the problems of the knowledge extraction for transportation engineering construction.We use the entity relation extraction method to extract the entity triples from the multi-sources heterogeneous data,and then employ knowledge inference to complete the edges in the constructed knowledge graph,finally perform quality evaluation to add the valid triples to the knowledge graph for updating.Subgraph matching technology is also exploited to retrieve the constructed knowledge graph for efficiently acquiring the useful knowledge about the quality and safety of transportation engineering projects.The results show that the constructed knowledge graph provides a practical and valuable tool for the quality and safety supervision of transportation engineering construction.展开更多
The quality of the software product is a crucial factor that contributes to its success. Therefore, it is important to specify the right software quality requirements that will establish the basis for desired quality ...The quality of the software product is a crucial factor that contributes to its success. Therefore, it is important to specify the right software quality requirements that will establish the basis for desired quality of the final system/software product. There are several known methodologies/ processes that support the specification of the system/software functional requirements starting from the user needs to finally obtain the system requirements that the developers can implement through their development process. System/software quality requirements are interdependent with functional requirements, which means that the system/software quality requirements are meant to be specified in parallel with the latter. The ISO/IEC 25000 [1] SQuaRE series of standards include the standard ISO/IEC 25030—Software engineering—Software Quality Requirements and Evaluation—Quality requirements [2], which has as main goal to help specify software quality requirements. As to date, this standard does not offer clear and concise steps that a software quality engineer could follow in order to specify them. This article presents modifications recommended for ISO/IEC 25030 standard, with, among the others, a new requirements definition process that allows for specifying the system/software quality requirements taking into account the existing published system and software quality model ISO/IEC 25010 [3] as well as all the stake- holders of the project.展开更多
Judging from the current situation of municipal engineering in our country, there are many problems, such as obsolete equipment and facilities, illegal operation by front-line construction personnel, inadequate superv...Judging from the current situation of municipal engineering in our country, there are many problems, such as obsolete equipment and facilities, illegal operation by front-line construction personnel, inadequate supervision and management by supervision units, etc. All these problems have seriously affected the operation and development of the whole municipal engineering system. Therefore, in order to solve these deficiencies, we must strengthen the municipal engineering construction management, strictly implement the relevant systems, regulations and laws, implement the relevant quality policy, and implement personnel accountability. Only in this way can the municipal engineering system operate smoothly, construct with high quality, and develop rapidly.展开更多
Testing is an important method to ensure the quality of something. The quality of products after testing can be guaranteed to ensure users safety and sense of experience. The engineering inspection of highway engineer...Testing is an important method to ensure the quality of something. The quality of products after testing can be guaranteed to ensure users safety and sense of experience. The engineering inspection of highway engineering can check whether the construction quality of highway is qualified or not. Highway, as an important transportation main line in our country and an important connecting corridor in various places, has become a very urgent matter to ensure the quality of highway construction in our country. Therefore, we should explore how to apply the highway engineering inspection in the quality control of highway engineering to ensure the construction quality and use effect of highway in our country.展开更多
As China continues to build an environment-friendly society and reduce chemicals such as oil and coal, China is determined to adjust energy efficiency, transforming conventional chemicals such as oil and coal into con...As China continues to build an environment-friendly society and reduce chemicals such as oil and coal, China is determined to adjust energy efficiency, transforming conventional chemicals such as oil and coal into controlling energy efficiency of clean new energy such as natural gas and gasoline. Chinas natural energy is developing rapidly, and the safety requirements of natural pipeline projects are also improving. In this case, this paper determines the quality status of Chinas natural gas pipeline production and some problems found in safety management, and determines some targeted measures.展开更多
Cracking during construction is a common occurrence in modern bridge engineering that can directly impact the overall safety of the bridge.Therefore,it is essential to focus on preventing and controlling cracks.As the...Cracking during construction is a common occurrence in modern bridge engineering that can directly impact the overall safety of the bridge.Therefore,it is essential to focus on preventing and controlling cracks.As the construction technology for bridge engineering has evolved,the internal quality of construction has significantly improved.However,the appearance quality remains a crucial factor that reflects the technical expertise of a construction company.Therefore,minimizing cracks and improving the appearance quality of concrete are critical issues that require the attention of construction units,supervision departments,and construction companies.This article will analyze the causes of cracking and suggest corresponding prevention and treatment methods.展开更多
Under the background of new engineering,the reform of the comprehensive practical course system for mechanical and electronic engineering majors actively responds to the challenges posed by the new round of technologi...Under the background of new engineering,the reform of the comprehensive practical course system for mechanical and electronic engineering majors actively responds to the challenges posed by the new round of technological revolution and industrial transformation to higher education,cultivating top-notch innovative intellectuals with comprehensive engineering qualities,meeting the requirements of being able to solve complex engineering problems rather than just cognitive capabilities,forming two core courses through reconstructing and reshaping the core courses of the major.The core courses include Drive,Measurement,and Control I and Drive,Measurement,and Control II,which highlight the comprehensive framework of mechanical and electronic engineering professional knowledge,continuing the comprehensive practical course system based on the unity of knowledge and practice,following the trend of new engineering,highlighting the practicality of professional innovation,assisting engineering education reform,and promoting high-quality development of new engineering professionals cultivation.展开更多
The relationship between major quality tools such as quality function development （QFD）, failure mode and effects analysis （FMEA）, design of experiments （DOE） and statistical process control （SPC） is analyzed ...The relationship between major quality tools such as quality function development （QFD）, failure mode and effects analysis （FMEA）, design of experiments （DOE） and statistical process control （SPC） is analyzed through an extensive review of the literature and the concurrent quality engineering philosophy, and a basic structure for the integration of quality tools is presented. An integrated quality management system （IQMS） is developed using C＋＋ Builder, running in the Windows 2000 Server environment with the basic internet connections, and SQL Server 2000 as the platform for developing the database, An illustrative example applying IQMS to the continuous quality improvement for a crane equipment manufacturing is reported. The result shows that the application of IQMS can optimize the process of design and manufacturing, shorten the cycle time of product, reduce the cost, and realize quality improvement continuously, The proposed integrated framework with IOMS is believed to be applicable to continuous quality improvement in many manufacturing companies.展开更多
This paper focuses on the assessment of college Specialty Construction Project quality. On the basis of conducting researches and analysises of Specialty Construction Practice, the anther selected projects indicators ...This paper focuses on the assessment of college Specialty Construction Project quality. On the basis of conducting researches and analysises of Specialty Construction Practice, the anther selected projects indicators of construction content with high frequency as evaluation index constituent connotation, referring to professional evaluation index system of provincial brand, and defended the issue that there will be no characteristic projects of specialty evaluate; formed the basic architecture of local colleges specialty evaluation index system, clearing grading assessment model, making debate analysis on its value orientation; and confirmed that the Ministry of Education is the main project, the university is the main building, and the provincial education administrative departments or the third party certification is the assessment mainbody, in this way to constitute the innovation management mode of Specialty Construction.展开更多
Quality function development (QFD) matrix was introduced as a tool to measure the quality management performance of contractors. Engineering quality, quality management system components, and their relationship were d...Quality function development (QFD) matrix was introduced as a tool to measure the quality management performance of contractors. Engineering quality, quality management system components, and their relationship were defined. An integrated engineering quality system was decomposed into seven factors and the quality management system was composed of eight factors. Importance weights of all factors and their relationship point were acquired by questionnaires and interviews. Then, QFD matrix was formulated and the calculating process was proposed. This model was verified on a case study. The result shows that it is useful for contractor in benchmarking themselves and invaluable for owners in the process of deciding contractor.展开更多
The quality management of overseas power projects, because it involves contract requirements, local regulations, standards, language communication and other aspects, has an important impact on the success or failure o...The quality management of overseas power projects, because it involves contract requirements, local regulations, standards, language communication and other aspects, has an important impact on the success or failure of the project. In the quality management of overseas power projects, the introduction of international third-party quality engineers will get twice the result with half the effort. This is mainly because we can quickly find quality engineers who are familiar with the power project process, have outstanding professional technology, and have strong English communication skills, and can deal with and solve quality problems in a timely manner.展开更多
In the construction of the first section of Qingdao new airport high-speed connection line project, the welding seam of simply supported reinforced-concrete composite girder steel box girder is thicker and the number ...In the construction of the first section of Qingdao new airport high-speed connection line project, the welding seam of simply supported reinforced-concrete composite girder steel box girder is thicker and the number of weld penetration weld is relatively large;the weld deformation and residual stress are larger and the welding has higher environmental requirements. How to control the weld quality is the key and difficult point of this project. Based on the exploration of the welding process in the early stage, this paper summarizes some key points of quality control of high quality welding, so as to guide the welding construction of the remaining steel box girder in this project.展开更多
At present, in the field of power grid construction, substation building installation project involves many kinds of specialties, has many cross operations and meets the problems of difficult construction process cont...At present, in the field of power grid construction, substation building installation project involves many kinds of specialties, has many cross operations and meets the problems of difficult construction process control under the traditional management mode and inadequate control of the construction process easily. In particular, there are many construction units, construction personnel and construction machinery and vehicles under UHV, the workload of construction management is large, the objects of capital construction information management are huge and complicated, it is easy to produce information timeliness, authenticity and traceability, and the problems of safety and quality control are easy to appear.展开更多
In the context of new development, our construction sector is affected by problems such as land shortage and population explosion, which require innovation and reform. Among them, as a key component of China's inf...In the context of new development, our construction sector is affected by problems such as land shortage and population explosion, which require innovation and reform. Among them, as a key component of China's infrastructure construction, architecture is a complex and huge system. In order to effectively improve the quality of construction, it is necessary to further strengthen construction control, improve the attention of relevant personnel, and constantly improve the overall competitiveness. Based on the in-depth analysis of the main problems in construction management, this paper puts forward strategies such as preparation before construction, control and management of construction process, implementation of quality acceptance system, equipment supervision and material management, hoping to provide reference for relevant personnel.展开更多
The 21st century is the era of information, small to our daily home, to scientific research, education and other fields, information technology has been fully integrated into our life, become our normal life can not l...The 21st century is the era of information, small to our daily home, to scientific research, education and other fields, information technology has been fully integrated into our life, become our normal life can not leave the technology. Municipal engineering construction is related to people's livelihood. Strengthening the quality and safety of engineering construction is conducive to ensuring people's interests. The application of BIM technology in engineering construction can provide powerful technical support to ensure a more stable operation of the project. This paper has carried out relevant research.展开更多
To illuminate the spatio-temporal variation characteristics and geochemical driving mechanism of soil pH in the Nenjiang River Basin,the National Multi-objective Regional Geochemical Survey data of topsoil,the Second ...To illuminate the spatio-temporal variation characteristics and geochemical driving mechanism of soil pH in the Nenjiang River Basin,the National Multi-objective Regional Geochemical Survey data of topsoil,the Second National Soil Survey data and Normalized Difference Vegetation Index(NDVI)were analyzed.The areas of neutral and alkaline soil decreased by 21100 km^(2)and 30500 km^(2),respectively,while that of strongly alkaline,extremely alkaline,and strongly acidic soil increased by 19600 km^(2),18200 km^(2),and 15500 km^(2),respectively,during the past 30 years.NDVI decreased with the increase of soil pH when soil pH>8.0,and it was reversed when soil pH<5.0.There were significant differences in soil pH with various surface cover types,which showed an ascending order:Arbor<reed<maize<rice<high and medium-covered meadow<low-covered meadow<Puccinellia.The weathering products of minerals rich in K_(2)O,Na_(2)O,CaO,and MgO entered into the low plain and were enriched in different parts by water transportation and lake deposition,while Fe and Al remained in the low hilly areas,which was the geochemical driving mechanism.The results of this study will provide scientific basis for making scientific and rational decisions on soil acidification and salinization.展开更多
文摘Quality engineers play a key role in software product development,covering various stages such as requirements analysis,design,coding,testing,and delivery.Its responsibilities include formulating quality standards,writing test cases,conducting functional and performance tests,and optimizing the product based on feedback.In government procurement projects,quality evaluation focuses on process compliance,security,and functional compatibility.KPI evaluation trees are commonly used for quantitative assessment,and a dynamic adjustment mechanism for indicators needs to be established to cope with complex demands.In addition,risk-driven testing and agile development should be combined to set up quality access control to ensure that each iteration version meets expectations.The multi-dimensional quality assurance and verification scoring mechanism can effectively enhance product reliability and reduce project risks.
基金supported by the National Natural Science Foundation of China (Grant Nos. 51005115 and 51005248)the Science Fund of State Key Laboratory of Automotive Safety and Energy (Grant No. KF11201)
文摘The model of the differential steering system(DSS) of electric vehicle with motorized wheels and the three-degree-of-freedom dynamic model of vehicle are built.Based on these models,the concepts and quantitative expressions of steering road feel,steering portability and steering stability are proposed.Through integrating the Monte Carlo descriptive sampling,elitist non-dominated sorting genetic algorithm(NSGA-II) and Taguchi robust design method,the system parameters are optimized with steering road feel and steering portability as optimization targets,and steering stability and steering portability as constraints.The simulation results show that the system optimized based on quality engineering can improve the steering road feel,guarantee steering stability and steering portability and thus provide a theoretical basis for the design and optimization of the electric vehicle with motorized wheels system.
文摘The article analysis of construction surface decoration quality, construction interior wall decoration quality, the construction of exterior wall tile adhesive quality and construction of aluminium alloy exterior quality problems, and points out the corresponding prevention measures on the problem. Finally, for wall cracks, the paper put forward the improvement measures.
基金This work was supported by Scientific Research Project of Department of Transportation of Hunan Province under Grant No.201814.
文摘Knowledge graph technology play a more and more important role in various fields of industry and academia.This paper firstly introduces the general framework of the knowledge graph construction,which includes three stages:information extraction,knowledge fusion and knowledge processing.In order to improve the efficiency of quality and safety supervision of transportation engineering construction,this paper constructs a knowledge graph by acquiring multi-sources heterogeneous data from supervision of transportation engineering quality and safety.It employs a bottom-up construction strategy and some natural language processing methods to solve the problems of the knowledge extraction for transportation engineering construction.We use the entity relation extraction method to extract the entity triples from the multi-sources heterogeneous data,and then employ knowledge inference to complete the edges in the constructed knowledge graph,finally perform quality evaluation to add the valid triples to the knowledge graph for updating.Subgraph matching technology is also exploited to retrieve the constructed knowledge graph for efficiently acquiring the useful knowledge about the quality and safety of transportation engineering projects.The results show that the constructed knowledge graph provides a practical and valuable tool for the quality and safety supervision of transportation engineering construction.
文摘The quality of the software product is a crucial factor that contributes to its success. Therefore, it is important to specify the right software quality requirements that will establish the basis for desired quality of the final system/software product. There are several known methodologies/ processes that support the specification of the system/software functional requirements starting from the user needs to finally obtain the system requirements that the developers can implement through their development process. System/software quality requirements are interdependent with functional requirements, which means that the system/software quality requirements are meant to be specified in parallel with the latter. The ISO/IEC 25000 [1] SQuaRE series of standards include the standard ISO/IEC 25030—Software engineering—Software Quality Requirements and Evaluation—Quality requirements [2], which has as main goal to help specify software quality requirements. As to date, this standard does not offer clear and concise steps that a software quality engineer could follow in order to specify them. This article presents modifications recommended for ISO/IEC 25030 standard, with, among the others, a new requirements definition process that allows for specifying the system/software quality requirements taking into account the existing published system and software quality model ISO/IEC 25010 [3] as well as all the stake- holders of the project.
文摘Judging from the current situation of municipal engineering in our country, there are many problems, such as obsolete equipment and facilities, illegal operation by front-line construction personnel, inadequate supervision and management by supervision units, etc. All these problems have seriously affected the operation and development of the whole municipal engineering system. Therefore, in order to solve these deficiencies, we must strengthen the municipal engineering construction management, strictly implement the relevant systems, regulations and laws, implement the relevant quality policy, and implement personnel accountability. Only in this way can the municipal engineering system operate smoothly, construct with high quality, and develop rapidly.
文摘Testing is an important method to ensure the quality of something. The quality of products after testing can be guaranteed to ensure users safety and sense of experience. The engineering inspection of highway engineering can check whether the construction quality of highway is qualified or not. Highway, as an important transportation main line in our country and an important connecting corridor in various places, has become a very urgent matter to ensure the quality of highway construction in our country. Therefore, we should explore how to apply the highway engineering inspection in the quality control of highway engineering to ensure the construction quality and use effect of highway in our country.
文摘As China continues to build an environment-friendly society and reduce chemicals such as oil and coal, China is determined to adjust energy efficiency, transforming conventional chemicals such as oil and coal into controlling energy efficiency of clean new energy such as natural gas and gasoline. Chinas natural energy is developing rapidly, and the safety requirements of natural pipeline projects are also improving. In this case, this paper determines the quality status of Chinas natural gas pipeline production and some problems found in safety management, and determines some targeted measures.
文摘Cracking during construction is a common occurrence in modern bridge engineering that can directly impact the overall safety of the bridge.Therefore,it is essential to focus on preventing and controlling cracks.As the construction technology for bridge engineering has evolved,the internal quality of construction has significantly improved.However,the appearance quality remains a crucial factor that reflects the technical expertise of a construction company.Therefore,minimizing cracks and improving the appearance quality of concrete are critical issues that require the attention of construction units,supervision departments,and construction companies.This article will analyze the causes of cracking and suggest corresponding prevention and treatment methods.
文摘Under the background of new engineering,the reform of the comprehensive practical course system for mechanical and electronic engineering majors actively responds to the challenges posed by the new round of technological revolution and industrial transformation to higher education,cultivating top-notch innovative intellectuals with comprehensive engineering qualities,meeting the requirements of being able to solve complex engineering problems rather than just cognitive capabilities,forming two core courses through reconstructing and reshaping the core courses of the major.The core courses include Drive,Measurement,and Control I and Drive,Measurement,and Control II,which highlight the comprehensive framework of mechanical and electronic engineering professional knowledge,continuing the comprehensive practical course system based on the unity of knowledge and practice,following the trend of new engineering,highlighting the practicality of professional innovation,assisting engineering education reform,and promoting high-quality development of new engineering professionals cultivation.
基金This project is supported by National Natural Science Foundation of China (No.70372062)Tianjin City Key Technologies R&D Program(No.04310881R)New Century Excellent Talent Program of Education Ministry of China(No.NCET-04-0240).
文摘The relationship between major quality tools such as quality function development （QFD）, failure mode and effects analysis （FMEA）, design of experiments （DOE） and statistical process control （SPC） is analyzed through an extensive review of the literature and the concurrent quality engineering philosophy, and a basic structure for the integration of quality tools is presented. An integrated quality management system （IQMS） is developed using C＋＋ Builder, running in the Windows 2000 Server environment with the basic internet connections, and SQL Server 2000 as the platform for developing the database, An illustrative example applying IQMS to the continuous quality improvement for a crane equipment manufacturing is reported. The result shows that the application of IQMS can optimize the process of design and manufacturing, shorten the cycle time of product, reduce the cost, and realize quality improvement continuously, The proposed integrated framework with IOMS is believed to be applicable to continuous quality improvement in many manufacturing companies.
文摘This paper focuses on the assessment of college Specialty Construction Project quality. On the basis of conducting researches and analysises of Specialty Construction Practice, the anther selected projects indicators of construction content with high frequency as evaluation index constituent connotation, referring to professional evaluation index system of provincial brand, and defended the issue that there will be no characteristic projects of specialty evaluate; formed the basic architecture of local colleges specialty evaluation index system, clearing grading assessment model, making debate analysis on its value orientation; and confirmed that the Ministry of Education is the main project, the university is the main building, and the provincial education administrative departments or the third party certification is the assessment mainbody, in this way to constitute the innovation management mode of Specialty Construction.
基金Funded by Postgraduate Scientific and Technical Innovation Project in Universities and Colleges of Jiangsu Province(CXLX_0161)
文摘Quality function development (QFD) matrix was introduced as a tool to measure the quality management performance of contractors. Engineering quality, quality management system components, and their relationship were defined. An integrated engineering quality system was decomposed into seven factors and the quality management system was composed of eight factors. Importance weights of all factors and their relationship point were acquired by questionnaires and interviews. Then, QFD matrix was formulated and the calculating process was proposed. This model was verified on a case study. The result shows that it is useful for contractor in benchmarking themselves and invaluable for owners in the process of deciding contractor.
文摘The quality management of overseas power projects, because it involves contract requirements, local regulations, standards, language communication and other aspects, has an important impact on the success or failure of the project. In the quality management of overseas power projects, the introduction of international third-party quality engineers will get twice the result with half the effort. This is mainly because we can quickly find quality engineers who are familiar with the power project process, have outstanding professional technology, and have strong English communication skills, and can deal with and solve quality problems in a timely manner.
文摘In the construction of the first section of Qingdao new airport high-speed connection line project, the welding seam of simply supported reinforced-concrete composite girder steel box girder is thicker and the number of weld penetration weld is relatively large;the weld deformation and residual stress are larger and the welding has higher environmental requirements. How to control the weld quality is the key and difficult point of this project. Based on the exploration of the welding process in the early stage, this paper summarizes some key points of quality control of high quality welding, so as to guide the welding construction of the remaining steel box girder in this project.
文摘At present, in the field of power grid construction, substation building installation project involves many kinds of specialties, has many cross operations and meets the problems of difficult construction process control under the traditional management mode and inadequate control of the construction process easily. In particular, there are many construction units, construction personnel and construction machinery and vehicles under UHV, the workload of construction management is large, the objects of capital construction information management are huge and complicated, it is easy to produce information timeliness, authenticity and traceability, and the problems of safety and quality control are easy to appear.
文摘In the context of new development, our construction sector is affected by problems such as land shortage and population explosion, which require innovation and reform. Among them, as a key component of China's infrastructure construction, architecture is a complex and huge system. In order to effectively improve the quality of construction, it is necessary to further strengthen construction control, improve the attention of relevant personnel, and constantly improve the overall competitiveness. Based on the in-depth analysis of the main problems in construction management, this paper puts forward strategies such as preparation before construction, control and management of construction process, implementation of quality acceptance system, equipment supervision and material management, hoping to provide reference for relevant personnel.
文摘The 21st century is the era of information, small to our daily home, to scientific research, education and other fields, information technology has been fully integrated into our life, become our normal life can not leave the technology. Municipal engineering construction is related to people's livelihood. Strengthening the quality and safety of engineering construction is conducive to ensuring people's interests. The application of BIM technology in engineering construction can provide powerful technical support to ensure a more stable operation of the project. This paper has carried out relevant research.
基金supported by China Geological Survey(DD20230554,DD20230089)the Strategic Priority Research Program of the Chinese Academy of Science(XDA28020302)the funding project of Northeast Geological S&T Innovation Center of China Geological Survey(QCJJ2022-40).
文摘To illuminate the spatio-temporal variation characteristics and geochemical driving mechanism of soil pH in the Nenjiang River Basin,the National Multi-objective Regional Geochemical Survey data of topsoil,the Second National Soil Survey data and Normalized Difference Vegetation Index(NDVI)were analyzed.The areas of neutral and alkaline soil decreased by 21100 km^(2)and 30500 km^(2),respectively,while that of strongly alkaline,extremely alkaline,and strongly acidic soil increased by 19600 km^(2),18200 km^(2),and 15500 km^(2),respectively,during the past 30 years.NDVI decreased with the increase of soil pH when soil pH>8.0,and it was reversed when soil pH<5.0.There were significant differences in soil pH with various surface cover types,which showed an ascending order:Arbor<reed<maize<rice<high and medium-covered meadow<low-covered meadow<Puccinellia.The weathering products of minerals rich in K_(2)O,Na_(2)O,CaO,and MgO entered into the low plain and were enriched in different parts by water transportation and lake deposition,while Fe and Al remained in the low hilly areas,which was the geochemical driving mechanism.The results of this study will provide scientific basis for making scientific and rational decisions on soil acidification and salinization.
