Objective To explore the risk management of the changes of sponsors and/or production sites during drug clinical trials based on the theories of quality management,risk management,and change management.Methods The met...Objective To explore the risk management of the changes of sponsors and/or production sites during drug clinical trials based on the theories of quality management,risk management,and change management.Methods The method of failure modes and effect analysis(FMEA)was used to identify risks through literature research,expert consultation,comparative research,and comprehensive analysis.Besides,risk priority number(RPN)was used to evaluate the risks.Results and Conclusion A FMEA of the changes of sponsors and/or production sites in clinical trials was constructed and RPN values of every failure mode and causes were obtained.Based on the RPN values,the core risk control points for different combination modes of sponsors and/or production sites after their changes were identified.It is recommended that China should strengthen the construction of the sponsor responsibility system.In addition,the changes of sponsors and/or production sites during the clinical trial period should be allowed in an orderly manner under the premise of ensuring the quality of clinical trials and subject protection.展开更多
IT SMEs as an important force can promote scientific and technological innovation and economic development,the effectiveness of project quality management mechanism is directly related to the survival and development ...IT SMEs as an important force can promote scientific and technological innovation and economic development,the effectiveness of project quality management mechanism is directly related to the survival and development of IT SMEs.This paper take IT SMEs as the research object,which deeply discusses the situation,existing problems and improvement strategies of the project quality management mechanism,and combines agile management and total quality management(TQM)theories to build a dynamic and adaptive project quality management mechanism.Through deeply analysis,the effectiveness of the mechanism is proposed,and the optimization path is proposed,aiming at providing theoretical support and practical guidance for enterprises to improve project delivery quality and enhance market competitiveness.展开更多
Objective:To investigate the effectiveness of quality management models in enhancing service quality at physical examination centers.Methods:A total of 1,200 examinees who received services at our hospital’s physical...Objective:To investigate the effectiveness of quality management models in enhancing service quality at physical examination centers.Methods:A total of 1,200 examinees who received services at our hospital’s physical examination center between January 2022 and June 2023 were randomly divided into a control group(600 cases)and an observation group(600 cases).The two groups were compared in terms of examination process duration,report quality scores,detection rate of abnormal findings,overall patient satisfaction,and staff job satisfaction.Results:The observation group showed significantly shorter examination time(98.5±15.2 minutes vs 156.3±22.7 minutes,P<0.01),higher report quality scores(92.4±3.5 vs 78.6±6.8 points,P<0.01),improved detection rate of abnormalities(38.7%vs 29.5%,P<0.05),increased patient satisfaction(97.2%vs 82.3%,P<0.01),and greater staff job satisfaction(90.5%vs 72.3%,P<0.01).Conclusion:Quality management models can significantly enhance service quality and operational efficiency at physical examination centers,improve examination outcomes and patient satisfaction,demonstrating substantial clinical application value.展开更多
Objective:To evaluate the effectiveness of quality nursing in the management of reusable instruments in the Central Sterile Supply Department(CSSD).Methods:Eleven nurses from the CSSD department were selected from Jan...Objective:To evaluate the effectiveness of quality nursing in the management of reusable instruments in the Central Sterile Supply Department(CSSD).Methods:Eleven nurses from the CSSD department were selected from January to October 2024,and quality nursing activities were implemented in the management of reusable instruments.The completion of quality indicators was analyzed.The instrument quality management scores,department satisfaction,and nurses’professional ability scores before and after nursing management were compared.Results:After nursing intervention,the qualified rates of initial cleaning and final cleaning of sterilization instruments were 99.66%and 100%,respectively.The qualified rate of packaging was 99.97%,the wet package rate was 0.1‰,the loading qualified rate was 99.88%,and the qualified rate of distribution was 99.99%.After nursing intervention,the nurses’instrument quality management scores,department satisfaction,and nurses’professional ability scores were all higher than those before nursing intervention(P<0.05).Conclusion:Quality nursing activities can improve the cleaning,packaging,and sterilization qualified rates of reusable instruments in the CSSD,enhance the effect of instrument quality management,obtain higher department satisfaction from nurses,cultivate their professional abilities,and possess significant nursing management advantages.展开更多
Objective To ensure the quality and safety of drugs in the whole cycle of pharmaceutical commissioned production under the drug marketing authorization holder(MAH)system,and to establish a perfect quality management s...Objective To ensure the quality and safety of drugs in the whole cycle of pharmaceutical commissioned production under the drug marketing authorization holder(MAH)system,and to establish a perfect quality management system for it.Methods Literature review was used to study the factors that influenced the quality management system of pharmaceutical commissioned production because the implementation of MAH system in China was late,and the experience accumulated by pharmaceutical industry was not enough.Results and Conclusion Based on the MAH system,it is of great significance to establish the quality management system for pharmaceutical commissioned production.展开更多
Quality management in building curtain wall construction covers both the essence and scope,including material control and process control.It is crucial for safety,longevity,and energy efficiency.Although quality manag...Quality management in building curtain wall construction covers both the essence and scope,including material control and process control.It is crucial for safety,longevity,and energy efficiency.Although quality management models are diverse,they have their limitations.The paper also discusses key points such as quality issues,material and process compatibility,and node construction,along with various techniques and management methods to improve quality.It also highlights areas for further research and future directions.展开更多
Human factors engineering and quality management are different research branches in the field of industrial engineering.A basis for interaction based on the concepts and techniques of human factors engineering and qua...Human factors engineering and quality management are different research branches in the field of industrial engineering.A basis for interaction based on the concepts and techniques of human factors engineering and quality management with some practical examples of cooperative effect is defined in this paper.The specific challenges about the quality management in manufacturing and service are presented to demonstrate that the human factors analysis of quality problems leads to new tends for integrated development.展开更多
This paper summarizes the benefits of ISO 9000 certification based on the findings of nine research studies conducted in more than ten developed countries/cities. Major benefits derived by the certified companies are ...This paper summarizes the benefits of ISO 9000 certification based on the findings of nine research studies conducted in more than ten developed countries/cities. Major benefits derived by the certified companies are identified. Future development approaches adopted by certified companies are summarized. Aspects of research methodology and objective for future research in ISO 9000 are also discussed.展开更多
This paper presents a model that can aid planners in defining the total allowable pollutant discharge in the planning region, accounting for the dynamic and stochastic character of meteorological conditions. This is a...This paper presents a model that can aid planners in defining the total allowable pollutant discharge in the planning region, accounting for the dynamic and stochastic character of meteorological conditions. This is accomplished by integrating Monte Carlo simulation and using genetic algorithm to solve the model. The model is demonstrated by using a realistic air urban scale SO 2 control problem in the Yuxi City of China. To evaluate effectiveness of the model, results of the approach are shown to compare with those of the linear deterministic procedures. This paper also provides a valuable insight into how air quality targets should be made when the air pollutant will not threat the residents' health. Finally, a discussion of the areas for further research are briefly delineated.展开更多
The assembly process of aerospace products such as satellites and rockets has the characteristics of single-or small-batch production,a long development period,high reliability,and frequent disturbances.How to predict...The assembly process of aerospace products such as satellites and rockets has the characteristics of single-or small-batch production,a long development period,high reliability,and frequent disturbances.How to predict and avoid quality abnormalities,quickly locate their causes,and improve product assembly quality and efficiency are urgent engineering issues.As the core technology to realize the integration of virtual and physical space,digital twin(DT)technology can make full use of the low cost,high efficiency,and predictable advantages of digital space to provide a feasible solution to such problems.Hence,a quality management method for the assembly process of aerospace products based on DT is proposed.Given that traditional quality control methods for the assembly process of aerospace products are mostly post-inspection,the Grey-Markov model and T-K control chart are used with a small sample of assembly quality data to predict the value of quality data and the status of an assembly system.The Apriori algorithm is applied to mine the strong association rules related to quality data anomalies and uncontrolled assembly systems so as to solve the issue that the causes of abnormal quality are complicated and difficult to trace.The implementation of the proposed approach is described,taking the collected centroid data of an aerospace product’s cabin,one of the key quality data in the assembly process of aerospace products,as an example.A DT-based quality management system for the assembly process of aerospace products is developed,which can effectively improve the efficiency of quality management for the assembly process of aerospace products and reduce quality abnormalities.展开更多
Instream aeration has been used as a supplement to secondary treatment or a substitute for tertiary treatment for meeting dissolved oxygen （DO） standards in rivers. Many studies have used water quality models to det...Instream aeration has been used as a supplement to secondary treatment or a substitute for tertiary treatment for meeting dissolved oxygen （DO） standards in rivers. Many studies have used water quality models to determine the number, location, and capacity of instream aeration stations （IASs） needed to meet DO standards in combination with other pollution control measures. DO concentrations have been improved in the North Shore Channel and North Branch Chicago River by the Devon Avenue IAS for more than 35 years. A study was initiated to determine whether it was better to rehabilitate or relocate this station and to determine appropriate operational guidance for the IAS at the selected location. A water quality model capable of simulating DO concentrations during unsteady flow was used to evaluate the proper location for an IAS and operational guidance for this IAS. Three test years, a dry year, a wet year, and an extreme year, were considered in the evaluation. The study found that the Devon Avenue IAS should be rehabilitated as this location performed as well as or better than any of 10 alternative locations. According to the new operational guidance for this IAS, the amount of time with blowers operating could be substantially reduced compared to traditional operations while at the same time the attainment of the DO standards could be increased. This study shows that a carefully designed modeling study is key to effective selection, location, and operation of IASs such that attainment of DO standards can be maximized while operation hours of blowers can be minimized.展开更多
Designing effective control policy requires accurate quantification of the relationship between the ambient concentrations of O3and PM2.5and the emissions of their precursors.However,the challenge is that precursor re...Designing effective control policy requires accurate quantification of the relationship between the ambient concentrations of O3and PM2.5and the emissions of their precursors.However,the challenge is that precursor reduction does not necessarily lead to decreases in the concentrations of O3and PM2.5,which are formed by multiple precursors under complex physical and chemical processes;this calls for the development of advanced model technologies to provide accurate predictions of the nonlinear responses of air quality to emissions.Different from the traditional sensitivity analysis and source apportionment methods,the reduced form models(RFMs)based on chemical transport models(CTMs)are able to quantify air quality responses to emissions more accurately and efficiently with lower computational cost.Here we review recent approaches used in RFMs and compare their structures,advantages and disadvantages,performance and applications.In general,RFMs are classified into three types including(1)sensitivity-based models,(2)models with simplified chemistry and physical processes,and(3)statistical models,with considerable differences in principles,characteristics and application ranges.The prediction of nonlinear responses by RFMs enables more in-depth analysis,not only in terms of real-time prediction of concentrations and quantification of human exposure,health impacts and economic damage,but also in optimizing control policies.Notably,data assimilation and emission inventory inversion based on the nonlinear response of concentrations to emissions can also be greatly beneficial to air pollution control management.In future studies,improvement in the performance of CTMs is exceedingly crucial to obtain a more reliable baseline for the prediction of air quality responses.Development of models to determine the air quality response to emissions under varying meteorological conditions is also necessary in the context of future climate changes,which pose great challenges to the quantification of response relationships.Additionally,with rising requirements for fine-scale air quality management,improving the performance of urban-scale simulations is worth considering.In short,accurate predictions of the response of air quality to emissions,though challenging,holds great promise for the present as well as for future scenarios.展开更多
This paper describes research undertaken by the authors to develop an integrated measurement and modeling methodology for water quality management of estuaries. The approach developed utilizes modeling and measurement...This paper describes research undertaken by the authors to develop an integrated measurement and modeling methodology for water quality management of estuaries. The approach developed utilizes modeling and measurement results in a synergistic manner. Modeling results were initially used to inform the field campaign of appropriate sampling locations and times, and field data were used to develop accurate models. Remote sensing techniques were used to capture data for both model development and model validation. Field surveys were undertaken to provide model initial conditions through data assimilation and determine nutrient fluxes into the model domain. From field data, salinity re- lationships were developed with various water quality parameters, and relationships between chlorophyll a concentrations, transparency, and light attenuation were also developed. These relationships proved to be invaluable in model development, particularly in modeling the growth and decay of chlorophyll a. Cork Harbour, an estuary that regularly experiences summer algal blooms due to anthropogenic sources of nutrients, was used as a case study to develop the methodology. The integration of remote sensing, conventional fieldwork, and modeling is one of the novel aspects of this research and the approach developed has widespread applicability.展开更多
Air pollution control policies in China have been experiencing profound changes,highlighting a strategic transformation from total pollutant emission control to air quality improvement,along with the shifting targets ...Air pollution control policies in China have been experiencing profound changes,highlighting a strategic transformation from total pollutant emission control to air quality improvement,along with the shifting targets starting from acid rain and NO_(x)emissions to PM_(2.5)pollution,and then the emerging O_(3)challenges.The marvelous achievements have been made with the dramatic decrease of SO_(2)emission and fundamental improvement of PM_(2.5)concentration.Despite these achievements,China has proposed Beautiful China target through 2035 and the goal of 2030 carbon peak and 2060 carbon neutrality,which impose stricter requirements on air quality and synergistic mitigation with Greenhouse Gas(GHG)emissions.Against this background,an integrated multi-objective and multi-benefit roadmap is required to provide decision support for China’s long-term air quality improvement strategy.This paper systematically reviews the technical system for developing the air quality improvement roadmap,which was integrated from the research output of China’s National Key R&D Program for Research on Atmospheric Pollution Factors and Control Technologies(hereafter Special NKP),covering mid-and long-term air quality target setting techniques,quantitative analysis techniques for emission reduction targets corresponding to air quality targets,and pathway optimization techniques for realizing reduction targets.The experience and lessons derived from the reviews have implications for the reformation of China’s air quality improvement roadmap in facing challenges of synergistic mitigation of PM_(2.5)and O_(3),and the coupling with climate change mitigation.展开更多
Taking the water ecosystem of Small Xingkai Lake as research object,through the survey and analysis of aquatic organism indicators,this paper established an ecosystem integrity evaluation system with the biological in...Taking the water ecosystem of Small Xingkai Lake as research object,through the survey and analysis of aquatic organism indicators,this paper established an ecosystem integrity evaluation system with the biological integrity as the criterion layer. Using the index of biological integrity and comprehensive health index,it evaluated the health status of water ecosystem of Small Xingkai Lake.展开更多
Recently, there has been an increasing awareness and implementation of practices associated with Partnering and Total Quality Management (TQM) in the construction industry. Partnering and TQM both seek to enhance cons...Recently, there has been an increasing awareness and implementation of practices associated with Partnering and Total Quality Management (TQM) in the construction industry. Partnering and TQM both seek to enhance construction outcomes, yet rigorous studies of Partnering and TQM have been conducted separately and have not carefully examined common or unique practices associated with these techniques. This paper presents the findings of a theoretical analysis of an integrated approach for the use of Partnering and TQM. A matrix approach has been used to explore the extent to which Partnering may improve TQM implementation in construction. The matrix is based around 3 indexes, namely; the Degree of Partnering, the Degree of TQM and the Project Success Index and enables the relationship between Partnering and TQM to be analysed quantitatively. It also assists in understanding the trends of Partnering and TQM and their relationship to project performance. The results of a case study using this matrix are also presented. It has been concluded that the integrated use of Partnering can facilitate improvements in the way TQM is implemented in construction.展开更多
Summary: ISO9000 quality management system (ISO9000QMS) emphasize on the customer-oriented, managers' leadership and all staff's joining, adopt the process method and system management, spread the taking facts...Summary: ISO9000 quality management system (ISO9000QMS) emphasize on the customer-oriented, managers' leadership and all staff's joining, adopt the process method and system management, spread the taking facts as a basis to make decision and improve consistently, and establish win-win relation with the suppliers. So, the digital hospital can adopt the ISO9000QMS. In order to establish the ISO9000QMS, the digital hospital should: (1) Design integrally, including analyzing the operation procedure, clarifying the job duties, setting up the spreading team and setting the quality policy and objectives: (2) Learning the ISO9000 quality standards; (3) Drawing up the documents, including the quality manual, program files and operation guiding files; (4) Training according the documents; (5) Executing the quality standard, including the service quality auditing, quality record auditing and quality system auditing; (6) Improving continually. With the establishment of ISO900QMS, the digital hospital can appraise more accurately, analyze quality matters statistically and avoid the interference of artificial factors.展开更多
In order to provide consumers with more safe and edible fungus products and to create a faithful social environment of food quality,the edible fungus products quality safety events,as well as their evoked factors and ...In order to provide consumers with more safe and edible fungus products and to create a faithful social environment of food quality,the edible fungus products quality safety events,as well as their evoked factors and effects on edible fungus industry were discussed in depth in this paper.The performance of edible fungus products quality management is a comprehensive reflection of technical effect,control effect and implementation effect.Among them,the implementation effect is the most important,which refers to the actual implementation effect of quality and safety rules by practitioners of edible fungus industry.Thus,the initiative implementation effect in quality management will be improved,and a quality assurance system in which practitioners are volunteered to participate and implement initiatively the quality standards and regulations so as to provide safe and high-quality products will be established,thereby achieving the best actual implementation effect in quality management.展开更多
River water plays a key role in human health, and in social and economic development, and is often affected by both natural factors and human activities. An in-depth understanding of the role of these factors can help...River water plays a key role in human health, and in social and economic development, and is often affected by both natural factors and human activities. An in-depth understanding of the role of these factors can help in developing an effective catchment management strategy to protect precious water resources. This study analyzed river water quality, patterns of terrestrial and riparian ecosystems, intensity of agricultural activities, industrial structure, and spatial distribution of pollutant emissions in the Haihe River Basin in China for the year of 2010, identifying the variables that have the greatest impact on river water quality. The area percentage of farmland in study area, the percentage of natural vegetation cover in the 1000-m riparian zone, rural population density, industrial Gross Domestic Product(GDP)/km^2, and industrial amino nitrogen emissions were all significantly correlated with river water quality(P < 0.05). Farming had the largest impact on river water quality, explaining 43.0% of the water quality variance, followed by the coverage of natural vegetation in the 1000-m riparian zone, which explained 36.2% of the water quality variance. Industrial amino nitrogen emissions intensity and rural population density explained 31.6% and 31.4% of the water quality variance, respectively, while industrial GDP/km^2 explained 26.6%. Together, these five indicators explained 67.3% of the total variance in water quality. Consequently, water environmental management of the Haihe River Basin should focus on adjusting agricultural activities, conserving riparian vegetation, and reducing industrial pollutant emissions by optimizing industrial structure. The results demonstrate how human activities drive the spatial pattern changes of river water quality, and they can provide reference for developing land use guidelines and for prioritizing management practices to maintain stream water quality in a large river basin.展开更多
The importance of risk thinking is emphasized in the ISO quality management system.In order to do a good job in quality management,we should use risk thinking to do a good job in risk management,improve the level of q...The importance of risk thinking is emphasized in the ISO quality management system.In order to do a good job in quality management,we should use risk thinking to do a good job in risk management,improve the level of quality management,and enhance customer satisfaction,so that enterprises can meet the international quality certification standards in the process of development,and have greater development space in the market.Therefore,this paper studies the risk thinking in the ISO quality management system,summarizes the concept of risk thinking in the ISO quality management system,analyzes the problems existing in the application of risk thinking in the ISO quality management system of Chinese enterprises,and puts forward some suggestions for improvement one by one.It is hoped that the analysis can promote Chinese enterprises to fully integrate risk-based thinking into quality management,calmly cope with risks and opportunities,and make customers more satisfied with their services and products.展开更多
文摘Objective To explore the risk management of the changes of sponsors and/or production sites during drug clinical trials based on the theories of quality management,risk management,and change management.Methods The method of failure modes and effect analysis(FMEA)was used to identify risks through literature research,expert consultation,comparative research,and comprehensive analysis.Besides,risk priority number(RPN)was used to evaluate the risks.Results and Conclusion A FMEA of the changes of sponsors and/or production sites in clinical trials was constructed and RPN values of every failure mode and causes were obtained.Based on the RPN values,the core risk control points for different combination modes of sponsors and/or production sites after their changes were identified.It is recommended that China should strengthen the construction of the sponsor responsibility system.In addition,the changes of sponsors and/or production sites during the clinical trial period should be allowed in an orderly manner under the premise of ensuring the quality of clinical trials and subject protection.
基金Young and Middle-aged Teachers’Basic Research Ability Improvement Project of Universities in Guangxi 2024Research on Coordinated Development of Smart Tourism and Rural Revitalization in Southwest China(Project No.:24KY0655)。
文摘IT SMEs as an important force can promote scientific and technological innovation and economic development,the effectiveness of project quality management mechanism is directly related to the survival and development of IT SMEs.This paper take IT SMEs as the research object,which deeply discusses the situation,existing problems and improvement strategies of the project quality management mechanism,and combines agile management and total quality management(TQM)theories to build a dynamic and adaptive project quality management mechanism.Through deeply analysis,the effectiveness of the mechanism is proposed,and the optimization path is proposed,aiming at providing theoretical support and practical guidance for enterprises to improve project delivery quality and enhance market competitiveness.
文摘Objective:To investigate the effectiveness of quality management models in enhancing service quality at physical examination centers.Methods:A total of 1,200 examinees who received services at our hospital’s physical examination center between January 2022 and June 2023 were randomly divided into a control group(600 cases)and an observation group(600 cases).The two groups were compared in terms of examination process duration,report quality scores,detection rate of abnormal findings,overall patient satisfaction,and staff job satisfaction.Results:The observation group showed significantly shorter examination time(98.5±15.2 minutes vs 156.3±22.7 minutes,P<0.01),higher report quality scores(92.4±3.5 vs 78.6±6.8 points,P<0.01),improved detection rate of abnormalities(38.7%vs 29.5%,P<0.05),increased patient satisfaction(97.2%vs 82.3%,P<0.01),and greater staff job satisfaction(90.5%vs 72.3%,P<0.01).Conclusion:Quality management models can significantly enhance service quality and operational efficiency at physical examination centers,improve examination outcomes and patient satisfaction,demonstrating substantial clinical application value.
文摘Objective:To evaluate the effectiveness of quality nursing in the management of reusable instruments in the Central Sterile Supply Department(CSSD).Methods:Eleven nurses from the CSSD department were selected from January to October 2024,and quality nursing activities were implemented in the management of reusable instruments.The completion of quality indicators was analyzed.The instrument quality management scores,department satisfaction,and nurses’professional ability scores before and after nursing management were compared.Results:After nursing intervention,the qualified rates of initial cleaning and final cleaning of sterilization instruments were 99.66%and 100%,respectively.The qualified rate of packaging was 99.97%,the wet package rate was 0.1‰,the loading qualified rate was 99.88%,and the qualified rate of distribution was 99.99%.After nursing intervention,the nurses’instrument quality management scores,department satisfaction,and nurses’professional ability scores were all higher than those before nursing intervention(P<0.05).Conclusion:Quality nursing activities can improve the cleaning,packaging,and sterilization qualified rates of reusable instruments in the CSSD,enhance the effect of instrument quality management,obtain higher department satisfaction from nurses,cultivate their professional abilities,and possess significant nursing management advantages.
文摘Objective To ensure the quality and safety of drugs in the whole cycle of pharmaceutical commissioned production under the drug marketing authorization holder(MAH)system,and to establish a perfect quality management system for it.Methods Literature review was used to study the factors that influenced the quality management system of pharmaceutical commissioned production because the implementation of MAH system in China was late,and the experience accumulated by pharmaceutical industry was not enough.Results and Conclusion Based on the MAH system,it is of great significance to establish the quality management system for pharmaceutical commissioned production.
文摘Quality management in building curtain wall construction covers both the essence and scope,including material control and process control.It is crucial for safety,longevity,and energy efficiency.Although quality management models are diverse,they have their limitations.The paper also discusses key points such as quality issues,material and process compatibility,and node construction,along with various techniques and management methods to improve quality.It also highlights areas for further research and future directions.
文摘Human factors engineering and quality management are different research branches in the field of industrial engineering.A basis for interaction based on the concepts and techniques of human factors engineering and quality management with some practical examples of cooperative effect is defined in this paper.The specific challenges about the quality management in manufacturing and service are presented to demonstrate that the human factors analysis of quality problems leads to new tends for integrated development.
文摘This paper summarizes the benefits of ISO 9000 certification based on the findings of nine research studies conducted in more than ten developed countries/cities. Major benefits derived by the certified companies are identified. Future development approaches adopted by certified companies are summarized. Aspects of research methodology and objective for future research in ISO 9000 are also discussed.
文摘This paper presents a model that can aid planners in defining the total allowable pollutant discharge in the planning region, accounting for the dynamic and stochastic character of meteorological conditions. This is accomplished by integrating Monte Carlo simulation and using genetic algorithm to solve the model. The model is demonstrated by using a realistic air urban scale SO 2 control problem in the Yuxi City of China. To evaluate effectiveness of the model, results of the approach are shown to compare with those of the linear deterministic procedures. This paper also provides a valuable insight into how air quality targets should be made when the air pollutant will not threat the residents' health. Finally, a discussion of the areas for further research are briefly delineated.
基金National Key Research and Development Program of China(Grant No.2020YFB1710300)National Natural Science Foundation of China(Grant No.52005042)+2 种基金National Defense Fundamental Research Foundation of China(Grant No.JCKY2020203B039)Equipment Pre-research Foundation of China(Grant No.80923010101)Beijing Institute of Technology Research Fund Program for Young Scholars.
文摘The assembly process of aerospace products such as satellites and rockets has the characteristics of single-or small-batch production,a long development period,high reliability,and frequent disturbances.How to predict and avoid quality abnormalities,quickly locate their causes,and improve product assembly quality and efficiency are urgent engineering issues.As the core technology to realize the integration of virtual and physical space,digital twin(DT)technology can make full use of the low cost,high efficiency,and predictable advantages of digital space to provide a feasible solution to such problems.Hence,a quality management method for the assembly process of aerospace products based on DT is proposed.Given that traditional quality control methods for the assembly process of aerospace products are mostly post-inspection,the Grey-Markov model and T-K control chart are used with a small sample of assembly quality data to predict the value of quality data and the status of an assembly system.The Apriori algorithm is applied to mine the strong association rules related to quality data anomalies and uncontrolled assembly systems so as to solve the issue that the causes of abnormal quality are complicated and difficult to trace.The implementation of the proposed approach is described,taking the collected centroid data of an aerospace product’s cabin,one of the key quality data in the assembly process of aerospace products,as an example.A DT-based quality management system for the assembly process of aerospace products is developed,which can effectively improve the efficiency of quality management for the assembly process of aerospace products and reduce quality abnormalities.
文摘Instream aeration has been used as a supplement to secondary treatment or a substitute for tertiary treatment for meeting dissolved oxygen （DO） standards in rivers. Many studies have used water quality models to determine the number, location, and capacity of instream aeration stations （IASs） needed to meet DO standards in combination with other pollution control measures. DO concentrations have been improved in the North Shore Channel and North Branch Chicago River by the Devon Avenue IAS for more than 35 years. A study was initiated to determine whether it was better to rehabilitate or relocate this station and to determine appropriate operational guidance for the IAS at the selected location. A water quality model capable of simulating DO concentrations during unsteady flow was used to evaluate the proper location for an IAS and operational guidance for this IAS. Three test years, a dry year, a wet year, and an extreme year, were considered in the evaluation. The study found that the Devon Avenue IAS should be rehabilitated as this location performed as well as or better than any of 10 alternative locations. According to the new operational guidance for this IAS, the amount of time with blowers operating could be substantially reduced compared to traditional operations while at the same time the attainment of the DO standards could be increased. This study shows that a carefully designed modeling study is key to effective selection, location, and operation of IASs such that attainment of DO standards can be maximized while operation hours of blowers can be minimized.
基金supported by the National Key R&D program of China(Nos.2019YFC0214800 and 2018YFC0213805)the National Natural Science Foundation of China(No.41907190)Shanghai Science and Technology Commission Scientific Research Project(No.19DZ1205006)。
文摘Designing effective control policy requires accurate quantification of the relationship between the ambient concentrations of O3and PM2.5and the emissions of their precursors.However,the challenge is that precursor reduction does not necessarily lead to decreases in the concentrations of O3and PM2.5,which are formed by multiple precursors under complex physical and chemical processes;this calls for the development of advanced model technologies to provide accurate predictions of the nonlinear responses of air quality to emissions.Different from the traditional sensitivity analysis and source apportionment methods,the reduced form models(RFMs)based on chemical transport models(CTMs)are able to quantify air quality responses to emissions more accurately and efficiently with lower computational cost.Here we review recent approaches used in RFMs and compare their structures,advantages and disadvantages,performance and applications.In general,RFMs are classified into three types including(1)sensitivity-based models,(2)models with simplified chemistry and physical processes,and(3)statistical models,with considerable differences in principles,characteristics and application ranges.The prediction of nonlinear responses by RFMs enables more in-depth analysis,not only in terms of real-time prediction of concentrations and quantification of human exposure,health impacts and economic damage,but also in optimizing control policies.Notably,data assimilation and emission inventory inversion based on the nonlinear response of concentrations to emissions can also be greatly beneficial to air pollution control management.In future studies,improvement in the performance of CTMs is exceedingly crucial to obtain a more reliable baseline for the prediction of air quality responses.Development of models to determine the air quality response to emissions under varying meteorological conditions is also necessary in the context of future climate changes,which pose great challenges to the quantification of response relationships.Additionally,with rising requirements for fine-scale air quality management,improving the performance of urban-scale simulations is worth considering.In short,accurate predictions of the response of air quality to emissions,though challenging,holds great promise for the present as well as for future scenarios.
基金supported by the Irish Environmental Protection Agency under the Environmental Monitoring,R&D Sub-Programme,Operational Programme for Environmental Sciences(Grant No.EPA_97_0151)
文摘This paper describes research undertaken by the authors to develop an integrated measurement and modeling methodology for water quality management of estuaries. The approach developed utilizes modeling and measurement results in a synergistic manner. Modeling results were initially used to inform the field campaign of appropriate sampling locations and times, and field data were used to develop accurate models. Remote sensing techniques were used to capture data for both model development and model validation. Field surveys were undertaken to provide model initial conditions through data assimilation and determine nutrient fluxes into the model domain. From field data, salinity re- lationships were developed with various water quality parameters, and relationships between chlorophyll a concentrations, transparency, and light attenuation were also developed. These relationships proved to be invaluable in model development, particularly in modeling the growth and decay of chlorophyll a. Cork Harbour, an estuary that regularly experiences summer algal blooms due to anthropogenic sources of nutrients, was used as a case study to develop the methodology. The integration of remote sensing, conventional fieldwork, and modeling is one of the novel aspects of this research and the approach developed has widespread applicability.
基金supported by the China’s National Key R&D Program(Nos.2019YFC0214804 and 2019YFC0214205)。
文摘Air pollution control policies in China have been experiencing profound changes,highlighting a strategic transformation from total pollutant emission control to air quality improvement,along with the shifting targets starting from acid rain and NO_(x)emissions to PM_(2.5)pollution,and then the emerging O_(3)challenges.The marvelous achievements have been made with the dramatic decrease of SO_(2)emission and fundamental improvement of PM_(2.5)concentration.Despite these achievements,China has proposed Beautiful China target through 2035 and the goal of 2030 carbon peak and 2060 carbon neutrality,which impose stricter requirements on air quality and synergistic mitigation with Greenhouse Gas(GHG)emissions.Against this background,an integrated multi-objective and multi-benefit roadmap is required to provide decision support for China’s long-term air quality improvement strategy.This paper systematically reviews the technical system for developing the air quality improvement roadmap,which was integrated from the research output of China’s National Key R&D Program for Research on Atmospheric Pollution Factors and Control Technologies(hereafter Special NKP),covering mid-and long-term air quality target setting techniques,quantitative analysis techniques for emission reduction targets corresponding to air quality targets,and pathway optimization techniques for realizing reduction targets.The experience and lessons derived from the reviews have implications for the reformation of China’s air quality improvement roadmap in facing challenges of synergistic mitigation of PM_(2.5)and O_(3),and the coupling with climate change mitigation.
文摘Taking the water ecosystem of Small Xingkai Lake as research object,through the survey and analysis of aquatic organism indicators,this paper established an ecosystem integrity evaluation system with the biological integrity as the criterion layer. Using the index of biological integrity and comprehensive health index,it evaluated the health status of water ecosystem of Small Xingkai Lake.
文摘Recently, there has been an increasing awareness and implementation of practices associated with Partnering and Total Quality Management (TQM) in the construction industry. Partnering and TQM both seek to enhance construction outcomes, yet rigorous studies of Partnering and TQM have been conducted separately and have not carefully examined common or unique practices associated with these techniques. This paper presents the findings of a theoretical analysis of an integrated approach for the use of Partnering and TQM. A matrix approach has been used to explore the extent to which Partnering may improve TQM implementation in construction. The matrix is based around 3 indexes, namely; the Degree of Partnering, the Degree of TQM and the Project Success Index and enables the relationship between Partnering and TQM to be analysed quantitatively. It also assists in understanding the trends of Partnering and TQM and their relationship to project performance. The results of a case study using this matrix are also presented. It has been concluded that the integrated use of Partnering can facilitate improvements in the way TQM is implemented in construction.
文摘Summary: ISO9000 quality management system (ISO9000QMS) emphasize on the customer-oriented, managers' leadership and all staff's joining, adopt the process method and system management, spread the taking facts as a basis to make decision and improve consistently, and establish win-win relation with the suppliers. So, the digital hospital can adopt the ISO9000QMS. In order to establish the ISO9000QMS, the digital hospital should: (1) Design integrally, including analyzing the operation procedure, clarifying the job duties, setting up the spreading team and setting the quality policy and objectives: (2) Learning the ISO9000 quality standards; (3) Drawing up the documents, including the quality manual, program files and operation guiding files; (4) Training according the documents; (5) Executing the quality standard, including the service quality auditing, quality record auditing and quality system auditing; (6) Improving continually. With the establishment of ISO900QMS, the digital hospital can appraise more accurately, analyze quality matters statistically and avoid the interference of artificial factors.
基金Sponsored by Coal-based Key Scientific and Technological Project of Shanxi Province(FT2014-03)Doctoral Foundation of Shanxi Academy of Agricultural Sciences(YBSJJ1616)
文摘In order to provide consumers with more safe and edible fungus products and to create a faithful social environment of food quality,the edible fungus products quality safety events,as well as their evoked factors and effects on edible fungus industry were discussed in depth in this paper.The performance of edible fungus products quality management is a comprehensive reflection of technical effect,control effect and implementation effect.Among them,the implementation effect is the most important,which refers to the actual implementation effect of quality and safety rules by practitioners of edible fungus industry.Thus,the initiative implementation effect in quality management will be improved,and a quality assurance system in which practitioners are volunteered to participate and implement initiatively the quality standards and regulations so as to provide safe and high-quality products will be established,thereby achieving the best actual implementation effect in quality management.
基金Under the auspices of National Natural Science Foundation of China(No.41371538)Independent Project of State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences(No.SKLURE2008-1-02)
文摘River water plays a key role in human health, and in social and economic development, and is often affected by both natural factors and human activities. An in-depth understanding of the role of these factors can help in developing an effective catchment management strategy to protect precious water resources. This study analyzed river water quality, patterns of terrestrial and riparian ecosystems, intensity of agricultural activities, industrial structure, and spatial distribution of pollutant emissions in the Haihe River Basin in China for the year of 2010, identifying the variables that have the greatest impact on river water quality. The area percentage of farmland in study area, the percentage of natural vegetation cover in the 1000-m riparian zone, rural population density, industrial Gross Domestic Product(GDP)/km^2, and industrial amino nitrogen emissions were all significantly correlated with river water quality(P < 0.05). Farming had the largest impact on river water quality, explaining 43.0% of the water quality variance, followed by the coverage of natural vegetation in the 1000-m riparian zone, which explained 36.2% of the water quality variance. Industrial amino nitrogen emissions intensity and rural population density explained 31.6% and 31.4% of the water quality variance, respectively, while industrial GDP/km^2 explained 26.6%. Together, these five indicators explained 67.3% of the total variance in water quality. Consequently, water environmental management of the Haihe River Basin should focus on adjusting agricultural activities, conserving riparian vegetation, and reducing industrial pollutant emissions by optimizing industrial structure. The results demonstrate how human activities drive the spatial pattern changes of river water quality, and they can provide reference for developing land use guidelines and for prioritizing management practices to maintain stream water quality in a large river basin.
文摘The importance of risk thinking is emphasized in the ISO quality management system.In order to do a good job in quality management,we should use risk thinking to do a good job in risk management,improve the level of quality management,and enhance customer satisfaction,so that enterprises can meet the international quality certification standards in the process of development,and have greater development space in the market.Therefore,this paper studies the risk thinking in the ISO quality management system,summarizes the concept of risk thinking in the ISO quality management system,analyzes the problems existing in the application of risk thinking in the ISO quality management system of Chinese enterprises,and puts forward some suggestions for improvement one by one.It is hoped that the analysis can promote Chinese enterprises to fully integrate risk-based thinking into quality management,calmly cope with risks and opportunities,and make customers more satisfied with their services and products.
