With a grant from the Italian Ministry of the Environment, the National Institute of Health (Istituto Superiore di Sanita) promoted and coordinated some activities aimed at determining the extent and the intensity of ...With a grant from the Italian Ministry of the Environment, the National Institute of Health (Istituto Superiore di Sanita) promoted and coordinated some activities aimed at determining the extent and the intensity of contamination of waters used for human consumption by some chemical agents, and describing causes and modalities of contamination and human health implications. The chemical agents examined were herbicides, nitrates, trihalomethanes, asbestos, manganese and fluoride. In this paper a first nationwide picture of these problems is reported.展开更多
Intelligent building is to adopt intelligent technology and implement construction according to construction objectives. At the same time, intelligent building has the characteristics of energy saving, systematization...Intelligent building is to adopt intelligent technology and implement construction according to construction objectives. At the same time, intelligent building has the characteristics of energy saving, systematization and specialization. Systematization mainly refers to the systematization of engineering construction work and building information in the construction process, and the effective combination of information technology, building performance and communication technology, so as to ensure the safety of the whole project construction. In addition, the main core technology of specialization is digital technology, which also has higher requirements for the intelligent technology of project construction managers. Energy saving refers to the use of digital technology, scientific arrangement of various resources, to ensure the effective use of building resources.展开更多
Building curtain wall is a common decorative wall in modern high-rise buildings and large buildings. Its quality is directly related to people's personal and property safety, and curtain wall quality has attracted...Building curtain wall is a common decorative wall in modern high-rise buildings and large buildings. Its quality is directly related to people's personal and property safety, and curtain wall quality has attracted more and more attention. This paper analyzes the construction technology of building curtain wall and some problems encountered in quality control and countermeasures.展开更多
Based on the rapid development of society, traffic engineering has become the focus of people's continuous attention, especially the construction quality of municipal roads and bridges is related to the overall qu...Based on the rapid development of society, traffic engineering has become the focus of people's continuous attention, especially the construction quality of municipal roads and bridges is related to the overall quality of infrastructure projects, and it also promotes the steady progress of the national economy. However, there are some quality problems in the process of municipal road and bridge construction. The construction unit must solve the quality problems one by one with a strong sense of responsibility, so that the road and bridge construction quality can be greatly improved and the service life of the road can be scientifically extended. Based on this, this paper makes an in-depth analysis of the common quality problems in municipal road and bridge construction, briefly describes the main factors that affect the construction quality, and puts forward scientific measures to ensure the construction quality in each stage, so as to promote the construction level of municipal roads and bridges in China to a new height.展开更多
In recent years, driven by China's economic development, people’s demand for construction is increasing, so they began to decorate and transform the buildings. Whether it is the renovation of old buildings or the...In recent years, driven by China's economic development, people’s demand for construction is increasing, so they began to decorate and transform the buildings. Whether it is the renovation of old buildings or the decoration of new buildings, it will bring a certain waste of resources, leading to a lot of building materials eventually become garbage. Today, we are in an era when all kinds of resources are relatively scarce. Therefore, it is everyone’s responsibility and obligation to save energy and reduce waste. On this premise, green construction methods emerge as the times require. In recent years, the State advocates batch fine decoration projects, also in order to realize the industrial production of decoration, reduce production costs, reduce the consumption of materials and energy. The use of green construction technology plays a very important role in the development of the construction industry and the protection of resources and environment, which greatly improves the core competitiveness of enterprises.展开更多
This paper analyzes the causes of loess collapsibility, expounds the common quality problems of collapsible loess foundation, and puts forward to prevent the common quality problems of collapsible loess foundation fro...This paper analyzes the causes of loess collapsibility, expounds the common quality problems of collapsible loess foundation, and puts forward to prevent the common quality problems of collapsible loess foundation from the aspects of design, construction and later maintenance management, hoping to provide effective suggestions for further improving the construction quality of foundation engineering.展开更多
There is growing interest in power quality issues due to wider developments in power delivery engineering.In order to maintain good power quality,it is necessary to detect and monitor power quality problems.The power ...There is growing interest in power quality issues due to wider developments in power delivery engineering.In order to maintain good power quality,it is necessary to detect and monitor power quality problems.The power quality monitoring requires storing large amount of data for analysis.This rapid increase in the size of databases has demanded new technique such as data mining to assist in the analysis and understanding of the data.This paper presents the classification of power quality problems such as voltage sag,swell,interruption and unbalance using data mining algorithms:J48,Random Tree and Random Forest decision trees.These algorithms are implemented on two sets of voltage data using WEKA software.The numeric attributes in first data set include 3-phase RMS voltages at the point of common coupling.In second data set,three more numeric attributes such as minimum,maximum and average voltages,are added along with 3-phase RMS voltages.The performance of the algorithms is evaluated in both the cases to determine the best classification algorithm,and the effect of addition of the three attributes in the second case is studied,which depicts the advantages in terms of classification accuracy and training time of the decision trees.展开更多
Real world study （RWS） has become a hotspot for clinical research. Data quality plays a vital role in research achievement and other clinical research fields. In this paper, the common quality problems in the RWS of...Real world study （RWS） has become a hotspot for clinical research. Data quality plays a vital role in research achievement and other clinical research fields. In this paper, the common quality problems in the RWS of traditional Chinese medicine are discussed, and a countermeasure is proposed.展开更多
Based on the brief description of the construction characteristics of HVAC engineering and the importance of analysis of common construction quality problems, this paper explores and summarizes the causes and preventi...Based on the brief description of the construction characteristics of HVAC engineering and the importance of analysis of common construction quality problems, this paper explores and summarizes the causes and prevention and control measures of common construction quality problems in HVAC engineering, and summarizes the key points of construction supervision from the two stages of construction preparation and installation construction, with a view to improving the prevention and control of common quality problems and quality supervision ability of relevant construction units. Further improve the construction quality of HVAC engineering.展开更多
The common lack of building quality is not only a major problem that cannot be completely avoided in today's buildings, but also an important factor that restricts the quality of architectural design. The most com...The common lack of building quality is not only a major problem that cannot be completely avoided in today's buildings, but also an important factor that restricts the quality of architectural design. The most common quality problems when installing buildings in electrical installations include laying pipelines, lightning protection, installation of electrical equipment, etc. These problems affect the quality of electrical installation projects, so electrical engineering and construction can be carried out smoothly only when effective measures and preventive measures are combined.展开更多
Under the background of sustainable development of social economy and comprehensive progress of construction engineering industry, prefabricated building engineering technology arises at the historic moment. This tech...Under the background of sustainable development of social economy and comprehensive progress of construction engineering industry, prefabricated building engineering technology arises at the historic moment. This technology gives play to the advantages of high efficiency, low cost, ecological and environmental protection in practical application, and is one of the key technical supports for the future development of the construction engineering industry. However, at present, the research and application of prefabricated building technology in China is still in the initial stage. There are some quality problems in component production, assembly construction and other links, which need to be further studied and gradually improved. This paper expounds the characteristics of the production and construction technology of prefabricated buildings, analyzes the quality problems existing in the current production process and construction and assembly process, and puts forward the improvement plan for these problems for reference.展开更多
The assets valuation industry in China is the product, which comes from the reform and open policy and the development of the socialist market economy. Under more than 20 years of development which begins to bud in th...The assets valuation industry in China is the product, which comes from the reform and open policy and the development of the socialist market economy. Under more than 20 years of development which begins to bud in the beginning of the nineteen nineties, the assets valuation industry has become the indispensable Intermediary trade of the socialist market economy system in China. With the scale of assets valuation agency enlarging and its rapidly growing business in recent years, however, some problems have been exposed gradually, which harm the social image of the industry of asset valuation seriously. So the social public and the relevant administrative departments pay close attention on the quality of the asset valuation. To know about what are the essential causes that affect the assets valuation industry managers＇ decision, this paper, through using some means which include literature research, interview and questionnaire investigation and utilizing the method of the factor analysis, relegates 24 questions which come from some answers of the respondents to three factors which are the practicing quality factor, the sting factor of an organization and the internal management factor of valuation organization. Furthermore, it will analyze the features of these factors which are divided into two factors that are internal motivation and external motivation, looking for the key cause of the assets valuation industry quality problem of China which purposes in order to promote the healthy development of valuation profession and much better standard the internal quality of valuation industry of China.展开更多
With the rapid development of the society, the development of the railway transportation industry is accelerating. Many places have begun to expand the railway, which can not only bring greater convenience to the tran...With the rapid development of the society, the development of the railway transportation industry is accelerating. Many places have begun to expand the railway, which can not only bring greater convenience to the transportation, but also to speed up the communication between regions. For the current development of railway transportation industry, railway construction can promote the development of transportation industry to a large extent, it is necessary to pay attention to ensure the stability and safety of railway construction. At present, there are some problems of maintenance quality in some railway engineering lines, which affect the operation utility of railway. This paper analyzes the factors endangering the safety of railway engineering lines and the existing maintenance problems, and puts forward the corresponding maintenance measures to improve the overall quality of railway.展开更多
Health condition monitoring of induction motors is important because of their vital role and wide us in a variety of industries.A stator inter-turn fault(SITF)is considered to be the most common electrical failure acc...Health condition monitoring of induction motors is important because of their vital role and wide us in a variety of industries.A stator inter-turn fault(SITF)is considered to be the most common electrical failure according to statisti-cal studies.In this paper,an algorithm for the detection of an SITF is presented.It is based on one of the blind source separation techniques called principal component analysis(PCA).The proposed algorithm uses PCA to discriminate between the faulty components of motor current signatures and motor voltage signatures from other components.The standard deviation of one of the decomposed vectors is used as a statistical SITF criterion.The proposed criterion is robust to non-fault conditions including voltage quality problems and large mechanical load changes as well as harmonic contaminants in the voltage supply.In addition,with a straightforward and low computational burden in the fault detection process,the proposed method is computationally efficient.To evaluate the performance of the proposed method,large numbers of practical and simulation scenarios are considered,and the results confrm the good performance,high degree of accuracy,and good convergence speed of the proposed method.展开更多
文摘With a grant from the Italian Ministry of the Environment, the National Institute of Health (Istituto Superiore di Sanita) promoted and coordinated some activities aimed at determining the extent and the intensity of contamination of waters used for human consumption by some chemical agents, and describing causes and modalities of contamination and human health implications. The chemical agents examined were herbicides, nitrates, trihalomethanes, asbestos, manganese and fluoride. In this paper a first nationwide picture of these problems is reported.
文摘Intelligent building is to adopt intelligent technology and implement construction according to construction objectives. At the same time, intelligent building has the characteristics of energy saving, systematization and specialization. Systematization mainly refers to the systematization of engineering construction work and building information in the construction process, and the effective combination of information technology, building performance and communication technology, so as to ensure the safety of the whole project construction. In addition, the main core technology of specialization is digital technology, which also has higher requirements for the intelligent technology of project construction managers. Energy saving refers to the use of digital technology, scientific arrangement of various resources, to ensure the effective use of building resources.
文摘Building curtain wall is a common decorative wall in modern high-rise buildings and large buildings. Its quality is directly related to people's personal and property safety, and curtain wall quality has attracted more and more attention. This paper analyzes the construction technology of building curtain wall and some problems encountered in quality control and countermeasures.
文摘Based on the rapid development of society, traffic engineering has become the focus of people's continuous attention, especially the construction quality of municipal roads and bridges is related to the overall quality of infrastructure projects, and it also promotes the steady progress of the national economy. However, there are some quality problems in the process of municipal road and bridge construction. The construction unit must solve the quality problems one by one with a strong sense of responsibility, so that the road and bridge construction quality can be greatly improved and the service life of the road can be scientifically extended. Based on this, this paper makes an in-depth analysis of the common quality problems in municipal road and bridge construction, briefly describes the main factors that affect the construction quality, and puts forward scientific measures to ensure the construction quality in each stage, so as to promote the construction level of municipal roads and bridges in China to a new height.
文摘In recent years, driven by China's economic development, people’s demand for construction is increasing, so they began to decorate and transform the buildings. Whether it is the renovation of old buildings or the decoration of new buildings, it will bring a certain waste of resources, leading to a lot of building materials eventually become garbage. Today, we are in an era when all kinds of resources are relatively scarce. Therefore, it is everyone’s responsibility and obligation to save energy and reduce waste. On this premise, green construction methods emerge as the times require. In recent years, the State advocates batch fine decoration projects, also in order to realize the industrial production of decoration, reduce production costs, reduce the consumption of materials and energy. The use of green construction technology plays a very important role in the development of the construction industry and the protection of resources and environment, which greatly improves the core competitiveness of enterprises.
文摘This paper analyzes the causes of loess collapsibility, expounds the common quality problems of collapsible loess foundation, and puts forward to prevent the common quality problems of collapsible loess foundation from the aspects of design, construction and later maintenance management, hoping to provide effective suggestions for further improving the construction quality of foundation engineering.
文摘There is growing interest in power quality issues due to wider developments in power delivery engineering.In order to maintain good power quality,it is necessary to detect and monitor power quality problems.The power quality monitoring requires storing large amount of data for analysis.This rapid increase in the size of databases has demanded new technique such as data mining to assist in the analysis and understanding of the data.This paper presents the classification of power quality problems such as voltage sag,swell,interruption and unbalance using data mining algorithms:J48,Random Tree and Random Forest decision trees.These algorithms are implemented on two sets of voltage data using WEKA software.The numeric attributes in first data set include 3-phase RMS voltages at the point of common coupling.In second data set,three more numeric attributes such as minimum,maximum and average voltages,are added along with 3-phase RMS voltages.The performance of the algorithms is evaluated in both the cases to determine the best classification algorithm,and the effect of addition of the three attributes in the second case is studied,which depicts the advantages in terms of classification accuracy and training time of the decision trees.
文摘Real world study （RWS） has become a hotspot for clinical research. Data quality plays a vital role in research achievement and other clinical research fields. In this paper, the common quality problems in the RWS of traditional Chinese medicine are discussed, and a countermeasure is proposed.
文摘Based on the brief description of the construction characteristics of HVAC engineering and the importance of analysis of common construction quality problems, this paper explores and summarizes the causes and prevention and control measures of common construction quality problems in HVAC engineering, and summarizes the key points of construction supervision from the two stages of construction preparation and installation construction, with a view to improving the prevention and control of common quality problems and quality supervision ability of relevant construction units. Further improve the construction quality of HVAC engineering.
文摘The common lack of building quality is not only a major problem that cannot be completely avoided in today's buildings, but also an important factor that restricts the quality of architectural design. The most common quality problems when installing buildings in electrical installations include laying pipelines, lightning protection, installation of electrical equipment, etc. These problems affect the quality of electrical installation projects, so electrical engineering and construction can be carried out smoothly only when effective measures and preventive measures are combined.
文摘Under the background of sustainable development of social economy and comprehensive progress of construction engineering industry, prefabricated building engineering technology arises at the historic moment. This technology gives play to the advantages of high efficiency, low cost, ecological and environmental protection in practical application, and is one of the key technical supports for the future development of the construction engineering industry. However, at present, the research and application of prefabricated building technology in China is still in the initial stage. There are some quality problems in component production, assembly construction and other links, which need to be further studied and gradually improved. This paper expounds the characteristics of the production and construction technology of prefabricated buildings, analyzes the quality problems existing in the current production process and construction and assembly process, and puts forward the improvement plan for these problems for reference.
文摘The assets valuation industry in China is the product, which comes from the reform and open policy and the development of the socialist market economy. Under more than 20 years of development which begins to bud in the beginning of the nineteen nineties, the assets valuation industry has become the indispensable Intermediary trade of the socialist market economy system in China. With the scale of assets valuation agency enlarging and its rapidly growing business in recent years, however, some problems have been exposed gradually, which harm the social image of the industry of asset valuation seriously. So the social public and the relevant administrative departments pay close attention on the quality of the asset valuation. To know about what are the essential causes that affect the assets valuation industry managers＇ decision, this paper, through using some means which include literature research, interview and questionnaire investigation and utilizing the method of the factor analysis, relegates 24 questions which come from some answers of the respondents to three factors which are the practicing quality factor, the sting factor of an organization and the internal management factor of valuation organization. Furthermore, it will analyze the features of these factors which are divided into two factors that are internal motivation and external motivation, looking for the key cause of the assets valuation industry quality problem of China which purposes in order to promote the healthy development of valuation profession and much better standard the internal quality of valuation industry of China.
文摘With the rapid development of the society, the development of the railway transportation industry is accelerating. Many places have begun to expand the railway, which can not only bring greater convenience to the transportation, but also to speed up the communication between regions. For the current development of railway transportation industry, railway construction can promote the development of transportation industry to a large extent, it is necessary to pay attention to ensure the stability and safety of railway construction. At present, there are some problems of maintenance quality in some railway engineering lines, which affect the operation utility of railway. This paper analyzes the factors endangering the safety of railway engineering lines and the existing maintenance problems, and puts forward the corresponding maintenance measures to improve the overall quality of railway.
文摘Health condition monitoring of induction motors is important because of their vital role and wide us in a variety of industries.A stator inter-turn fault(SITF)is considered to be the most common electrical failure according to statisti-cal studies.In this paper,an algorithm for the detection of an SITF is presented.It is based on one of the blind source separation techniques called principal component analysis(PCA).The proposed algorithm uses PCA to discriminate between the faulty components of motor current signatures and motor voltage signatures from other components.The standard deviation of one of the decomposed vectors is used as a statistical SITF criterion.The proposed criterion is robust to non-fault conditions including voltage quality problems and large mechanical load changes as well as harmonic contaminants in the voltage supply.In addition,with a straightforward and low computational burden in the fault detection process,the proposed method is computationally efficient.To evaluate the performance of the proposed method,large numbers of practical and simulation scenarios are considered,and the results confrm the good performance,high degree of accuracy,and good convergence speed of the proposed method.
