In order to provide a reference for the further study of microbial contamination in the pork production process. Microbial contamination of pigs came from three slaughterhouses were detected, and critical control poin...In order to provide a reference for the further study of microbial contamination in the pork production process. Microbial contamination of pigs came from three slaughterhouses were detected, and critical control points in the progress of hog slaughter and processing were analyzed. The results showed that microbial con- taminatian existed in the entire slaughter and processing progress, including shower and assassination bloodletting, separation of the internal organs, chopping boards, workshop environment, personal hygiene of the operators, etc. , which should be paid more attention to. The results indicated that reasonable protection measures should be carried out, disinfection awareness of the operators should be improved, and regular disinfection should be ruled under the condition of continu- ous operation.展开更多
The control points are the key issue of the internal control, and the key control points mean the control joints that play an important part in the process of the operation. If these key control points are not well co...The control points are the key issue of the internal control, and the key control points mean the control joints that play an important part in the process of the operation. If these key control points are not well controlled, the process of the operation disposal will be mistaken and cannot reach the goal. However, for the confirmation of the control points, many studies only do qualitative research from the important aspect instead of quantificational research. They are devoid of a series of scientific methods. This paper advances quantificational methods to confirm the key control points from two aspects of job evaluation and mathematics model.展开更多
China's land area is relatively vast, but there are obvious differences in geological structure and environmental conditions in various regions, which lead to the situation of crossing mountains in the process of ...China's land area is relatively vast, but there are obvious differences in geological structure and environmental conditions in various regions, which lead to the situation of crossing mountains in the process of highway construction. When encountering this problem, tunnel engineering can be used to carry out highway construction. This article focuses on the highway tunnel construction technology and control points to conduct a comprehensive and in-depth research and analysis, hoping to help the future sustainable and stable development of China's highway engineering industry and lay a solid foundation for the continuous development of China's comprehensive national strength.展开更多
With the effective implementation of construction engineering management work, in order to comprehensively promote the construction level of construction engineering, optimize the quality of construction management, c...With the effective implementation of construction engineering management work, in order to comprehensively promote the construction level of construction engineering, optimize the quality of construction management, construction engineering management personnel in the existing engineering technology requirements, clear the management points and work core tasks, build new optimization measures, put forward new working ideas for the later construction engineering technology management work. However, at the present stage, due to the restriction of the management mode and work mode, most of the construction engineering technology management work in China is not implemented in place, and the various management work objectives are not clear, which not only leads to the difficult implementation of various management tasks, but also leads to the occurrence of various safety risks. For this paper on the current stage of the basis of the analysis of the importance of construction engineering technical management, clear the main problems existing in the work, the construction engineering technical management control points and optimization measures, on the one hand to promote the high quality construction of construction engineering, on the other hand for the late construction engineering quality optimization provides new ideas.展开更多
Objective: to explore and analyze the quality management of key control points in blood supply department of blood station. Methods: the study took the blood supply department of the blood station as the pilot, and th...Objective: to explore and analyze the quality management of key control points in blood supply department of blood station. Methods: the study took the blood supply department of the blood station as the pilot, and the research was carried out from April 2021 to may 2022. The observation group was divided according to the time. From April 2021 to October 2021, 500 blood samples were screened through retrospective analysis, aiming at the key control points in the storage and distribution of blood products in the quality management of the blood supply department of the blood station, forming a clear quality management system within the blood supply department, and strengthening the quality management of key control points. The qualified rate of blood quality was observed from November 2021 to February 2025. Results: the unqualified rate of blood after quality management of key control points was lower than that before management (P < 0.05);Before and after the quality management of key control points, the management quality scores of blood supply department staff in environmental monitoring, quality screening and safety management were higher than those before the management (P < 0.05). Conclusion: strengthening the quality management of the key control points of the blood supply department of the blood station and implementing the continuous quality improvement countermeasures are helpful to strengthen the quality management system of the blood supply department, implement the work of the key control points of the blood supply department of the blood station, improve the quality control in the storage and distribution of blood products, effectively ensure the blood quality, and can be popularized in practical work.展开更多
This paper discusses the approaches for automatical searching of control points in the NOAA AVHRR image on the basis of data rearrangement in the form of latitude and longitude grid. The vegetation index transformatio...This paper discusses the approaches for automatical searching of control points in the NOAA AVHRR image on the basis of data rearrangement in the form of latitude and longitude grid. The vegetation index transformation and multi-level matching strategies have been proven effective and successful as the experiments show while the control point database is established.展开更多
Cancer immunotherapy aims at enhancing immune system to defend against the tumor. However, it is associated with injecting small doses of tumor-bearing molecules or even using drugs. The problem is that how to schedul...Cancer immunotherapy aims at enhancing immune system to defend against the tumor. However, it is associated with injecting small doses of tumor-bearing molecules or even using drugs. The problem is that how to schedule these injections effectively and/or how to apply drugs in a way to decrease toxic side effects of drugs such that the tumor growth to be stopped or at least to be limited. Here, the theory of optimal control has been applied to find the optimal schedule of injections of an immunotherapeutic agent against cancer. The numerical method employed works for any dynamic linear system and has almost precise solution. In this work, it was tested for a well known model of the tumor immune system interaction.展开更多
In this paper, Bezier surface form is used to find the approximate solution of delay differential equations (DDE’s). By using a recurrence relation and the traditional least square minimization method, the best contr...In this paper, Bezier surface form is used to find the approximate solution of delay differential equations (DDE’s). By using a recurrence relation and the traditional least square minimization method, the best control points of residual function can be found where those control points determine the approximate solution of DDE. Some examples are given to show efficiency of the proposed method.展开更多
Aim In accordance with the positioning control for valve controlled motor electrohydraulic proportional servo systems driving the static load torque, the positioning performance was studied in the presence of the ti...Aim In accordance with the positioning control for valve controlled motor electrohydraulic proportional servo systems driving the static load torque, the positioning performance was studied in the presence of the time? varying deadzone and gain. Methods The large positioning errors caused by the time varying deadzone were significantly reduced by using the dynamic compensation method for the deadzone; and the large overshoot caused by the time varying gain were dramatically reduced by using the three section intelligent control schemes. Results Experimental results demonstrated that the positioning performance of rapid response, high accuracy and smaller or even no overshoot was achieved under a wide variations of load torque. Conclusion The good positioning performance for valve controlled motor servo systems has been achieved in the presence of the time varying deadzone and gain.展开更多
Under the impetus of building a socialist road, the construction industry is developing rapidly, both in scale and in quantity. However, in the actual construction process, there will still be many problems, which wil...Under the impetus of building a socialist road, the construction industry is developing rapidly, both in scale and in quantity. However, in the actual construction process, there will still be many problems, which will affect the construction progress and quality. Among them, the over-budget phenomenon of project cost caused by various factors is still relatively serious. Therefore, it is necessary to fully clarify the key points of budget control in the process of cost budget, so as to make the cost budget more scientific and accurate, thus achieving the purpose of cost control and reducing economic losses.展开更多
The budget management of construction project cost is the premise and foundation of construction project management. Good cost budget management can effectively improve the quality standard in the process of construct...The budget management of construction project cost is the premise and foundation of construction project management. Good cost budget management can effectively improve the quality standard in the process of construction, and lay a solid foundation for the later construction quality acceptance. Nowadays, more and more developers and construction units pay more attention to the cost budget management, and are building a professional team. The purpose is to improve their own cost budget management ability and reduce the economic loss in the construction process.展开更多
The failure prone production systems are examined. For the hybrid systems, the failure of machines is unavoidable. By introduced the idea of purchasing extra capacity to the system, a so-call blockage hedging point is...The failure prone production systems are examined. For the hybrid systems, the failure of machines is unavoidable. By introduced the idea of purchasing extra capacity to the system, a so-call blockage hedging point is obtained. Meanwhile, a near-optimal method is presented to determine the optimal buffer sizes. The continuous flow model of the unreliable manufacturing systems is considered and the control point policy is involved in. Numerical results not only testify the method and show us its application but also to some extent show the impact of the machines＇ failure rate on the optimal buffer size.展开更多
With the gradual acceleration of the urbanization process,the construction industry has been developing rapidly.As the key link to ensure the quality and safety of the project,construction management and construction ...With the gradual acceleration of the urbanization process,the construction industry has been developing rapidly.As the key link to ensure the quality and safety of the project,construction management and construction quality control are of great significance to enhance the competitiveness of construction enterprises and realize sustainable development.In this paper,the effective strategy of construction management and the effective strategy of construction quality control will be discussed in depth,aiming at providing useful management and quality control strategies for construction enterprises.展开更多
The recent development of light field cameras has received growing interest, as their rich angular information has potential benefits for many computer vision tasks. In this paper, we introduce a novel method to obtai...The recent development of light field cameras has received growing interest, as their rich angular information has potential benefits for many computer vision tasks. In this paper, we introduce a novel method to obtain a dense disparity map by use of ground control points(GCPs) in the light field.Previous work optimizes the disparity map by local estimation which includes both reliable points and unreliable points. To reduce the negative effect of the unreliable points, we predict the disparity at non-GCPs from GCPs. Our method performs more robustly in shadow areas than previous methods based on GCP work, since we combine color information and local disparity. Experiments and comparisons on a public dataset demonstrate the effectiveness of our proposed method.展开更多
A neural network model with a special structure, which is divided into linearand nonlinear parts, was proposed for identification of a nonlinear system. In this model, thenonlinear part of the object is treated as a m...A neural network model with a special structure, which is divided into linearand nonlinear parts, was proposed for identification of a nonlinear system. In this model, thenonlinear part of the object is treated as a measured disturbance, and is compensated by a feedforward method; an adaptive pole placement algorithm is used to control the linear part of theobject. The simulation results show that the identification efficiency and accuracy are improvedwhen the new controller is applied to sintering finish point control.展开更多
Limitations of various accumulators in hybrid hydraulic excavator are analyzed. A program using capacitor as the accumulator based on constant work-point control is put forward. A simulating experimental system of hyb...Limitations of various accumulators in hybrid hydraulic excavator are analyzed. A program using capacitor as the accumulator based on constant work-point control is put forward. A simulating experimental system of hybrid construction machinery is established, and experimental study on constant work-point control for parallel hybrid system with capacitor accumulator is carried out using the pressure and flow rate derived from boom cylinder of hydraulic excavator in actual work as the simulating loads. A program of double work-point control is proposed and proved by further experiments.展开更多
For the advanced tokamak,the particle deposition and thermal load on the divertor is a big challenge.By moving the strike points on divertor target plates,the position of particle deposition and thermal load can be sh...For the advanced tokamak,the particle deposition and thermal load on the divertor is a big challenge.By moving the strike points on divertor target plates,the position of particle deposition and thermal load can be shifted.We could adjust the Poloidal Field（PF） coil current to achieve the strike point position feedback control.Using isoflux control method,the strike point position can be controlled by controlling the X point position.On the basis of experimental data,we establish relational expressions between X point position and strike point position.Benchmark experiments are carried out to validate the correctness and robustness of the control methods.The strike point position is successfully controlled following our command in the EAST operation.展开更多
The main causes of non-point source pollution in Taihu Lake are the improper ways of crop production, animal husbandry, and daily runoff. The paper discusses the relationship between countrywomen and non-point source ...The main causes of non-point source pollution in Taihu Lake are the improper ways of crop production, animal husbandry, and daily runoff. The paper discusses the relationship between countrywomen and non-point source pollution control by 731 questionnaires in Weidu village and 466 questionnaires in Dapu Town. The roles of countrywomen have changed in families and they have close relationship with non-point source pollution. Furthermore, we discuss the possibility and methods of organizing countrywomen in non-point source pollution control.展开更多
Coupled turbulent flow, temperature fields of the twin-roll casting strip process were simulated by three-dimensional finite element method. Based on the heat balance calculation and using inverse methods between the ...Coupled turbulent flow, temperature fields of the twin-roll casting strip process were simulated by three-dimensional finite element method. Based on the heat balance calculation and using inverse methods between the simulations and real experiments, the relational models among casting speed, location, and coefficient of heat transfer between molten metal and rolls in different regions are given. In the simulation, the calculated surface temperatures are in good agreement with the measured values. An on-line model of kiss point is derived by simulations and the geometry of molten pool, corresponding control strategy is also proposed.展开更多
[Objective] The aim was to study the control model of rural non-point source pollution.[Method] Taking Ninghe County(a typical agricultural county in Tianjin) as an example,the current development of local economy and...[Objective] The aim was to study the control model of rural non-point source pollution.[Method] Taking Ninghe County(a typical agricultural county in Tianjin) as an example,the current development of local economy and society and characteristics of rural non-point source pollution were studied firstly,then the control model of rural non-point source pollution suitable for Ninghe County was constructed,and its environmental and economic benefits were analyzed finally.[Result] According to the sources of non-point source pollution,the control model of rural non-point source pollution in Ninghe County was divided into three modules from the aspects of planting industry,livestock raising industry and rural living.The main content of non-point source pollution control module of planting industry was composed of rational utilization of chemicals,water-saving irrigation,diversified utilization of straw etc.Non-point source pollution control module of livestock raising industry focused on the site selection of farm or raising zones,choice of raising mode,comprehensive utilization of livestock waste etc.In the non-point source pollution control module of rural living,villages were divided into two types(small town and ecological village) based on various geographical positions.In a word,these three modules were interrelated and targeted for non-point source pollution control in villages under different development situations.[Conclusion] The study could provide references for the rural non-point source pollution control in Hai River basin and other regions of Northern China.展开更多
文摘In order to provide a reference for the further study of microbial contamination in the pork production process. Microbial contamination of pigs came from three slaughterhouses were detected, and critical control points in the progress of hog slaughter and processing were analyzed. The results showed that microbial con- taminatian existed in the entire slaughter and processing progress, including shower and assassination bloodletting, separation of the internal organs, chopping boards, workshop environment, personal hygiene of the operators, etc. , which should be paid more attention to. The results indicated that reasonable protection measures should be carried out, disinfection awareness of the operators should be improved, and regular disinfection should be ruled under the condition of continu- ous operation.
文摘The control points are the key issue of the internal control, and the key control points mean the control joints that play an important part in the process of the operation. If these key control points are not well controlled, the process of the operation disposal will be mistaken and cannot reach the goal. However, for the confirmation of the control points, many studies only do qualitative research from the important aspect instead of quantificational research. They are devoid of a series of scientific methods. This paper advances quantificational methods to confirm the key control points from two aspects of job evaluation and mathematics model.
文摘China's land area is relatively vast, but there are obvious differences in geological structure and environmental conditions in various regions, which lead to the situation of crossing mountains in the process of highway construction. When encountering this problem, tunnel engineering can be used to carry out highway construction. This article focuses on the highway tunnel construction technology and control points to conduct a comprehensive and in-depth research and analysis, hoping to help the future sustainable and stable development of China's highway engineering industry and lay a solid foundation for the continuous development of China's comprehensive national strength.
文摘With the effective implementation of construction engineering management work, in order to comprehensively promote the construction level of construction engineering, optimize the quality of construction management, construction engineering management personnel in the existing engineering technology requirements, clear the management points and work core tasks, build new optimization measures, put forward new working ideas for the later construction engineering technology management work. However, at the present stage, due to the restriction of the management mode and work mode, most of the construction engineering technology management work in China is not implemented in place, and the various management work objectives are not clear, which not only leads to the difficult implementation of various management tasks, but also leads to the occurrence of various safety risks. For this paper on the current stage of the basis of the analysis of the importance of construction engineering technical management, clear the main problems existing in the work, the construction engineering technical management control points and optimization measures, on the one hand to promote the high quality construction of construction engineering, on the other hand for the late construction engineering quality optimization provides new ideas.
文摘Objective: to explore and analyze the quality management of key control points in blood supply department of blood station. Methods: the study took the blood supply department of the blood station as the pilot, and the research was carried out from April 2021 to may 2022. The observation group was divided according to the time. From April 2021 to October 2021, 500 blood samples were screened through retrospective analysis, aiming at the key control points in the storage and distribution of blood products in the quality management of the blood supply department of the blood station, forming a clear quality management system within the blood supply department, and strengthening the quality management of key control points. The qualified rate of blood quality was observed from November 2021 to February 2025. Results: the unqualified rate of blood after quality management of key control points was lower than that before management (P < 0.05);Before and after the quality management of key control points, the management quality scores of blood supply department staff in environmental monitoring, quality screening and safety management were higher than those before the management (P < 0.05). Conclusion: strengthening the quality management of the key control points of the blood supply department of the blood station and implementing the continuous quality improvement countermeasures are helpful to strengthen the quality management system of the blood supply department, implement the work of the key control points of the blood supply department of the blood station, improve the quality control in the storage and distribution of blood products, effectively ensure the blood quality, and can be popularized in practical work.
基金Project supported by the National Oommission of Defense Science and Technotocjy(No.Y96-10)
文摘This paper discusses the approaches for automatical searching of control points in the NOAA AVHRR image on the basis of data rearrangement in the form of latitude and longitude grid. The vegetation index transformation and multi-level matching strategies have been proven effective and successful as the experiments show while the control point database is established.
文摘Cancer immunotherapy aims at enhancing immune system to defend against the tumor. However, it is associated with injecting small doses of tumor-bearing molecules or even using drugs. The problem is that how to schedule these injections effectively and/or how to apply drugs in a way to decrease toxic side effects of drugs such that the tumor growth to be stopped or at least to be limited. Here, the theory of optimal control has been applied to find the optimal schedule of injections of an immunotherapeutic agent against cancer. The numerical method employed works for any dynamic linear system and has almost precise solution. In this work, it was tested for a well known model of the tumor immune system interaction.
文摘In this paper, Bezier surface form is used to find the approximate solution of delay differential equations (DDE’s). By using a recurrence relation and the traditional least square minimization method, the best control points of residual function can be found where those control points determine the approximate solution of DDE. Some examples are given to show efficiency of the proposed method.
文摘Aim In accordance with the positioning control for valve controlled motor electrohydraulic proportional servo systems driving the static load torque, the positioning performance was studied in the presence of the time? varying deadzone and gain. Methods The large positioning errors caused by the time varying deadzone were significantly reduced by using the dynamic compensation method for the deadzone; and the large overshoot caused by the time varying gain were dramatically reduced by using the three section intelligent control schemes. Results Experimental results demonstrated that the positioning performance of rapid response, high accuracy and smaller or even no overshoot was achieved under a wide variations of load torque. Conclusion The good positioning performance for valve controlled motor servo systems has been achieved in the presence of the time varying deadzone and gain.
文摘Under the impetus of building a socialist road, the construction industry is developing rapidly, both in scale and in quantity. However, in the actual construction process, there will still be many problems, which will affect the construction progress and quality. Among them, the over-budget phenomenon of project cost caused by various factors is still relatively serious. Therefore, it is necessary to fully clarify the key points of budget control in the process of cost budget, so as to make the cost budget more scientific and accurate, thus achieving the purpose of cost control and reducing economic losses.
文摘The budget management of construction project cost is the premise and foundation of construction project management. Good cost budget management can effectively improve the quality standard in the process of construction, and lay a solid foundation for the later construction quality acceptance. Nowadays, more and more developers and construction units pay more attention to the cost budget management, and are building a professional team. The purpose is to improve their own cost budget management ability and reduce the economic loss in the construction process.
基金This research is supported by the Project of the Great Technology Innovation of Gansu Province, China（2GS063-A52-005-01） and the Natural Science Foundation of Gansu Province, China（3XS062-B25-034）.
文摘The failure prone production systems are examined. For the hybrid systems, the failure of machines is unavoidable. By introduced the idea of purchasing extra capacity to the system, a so-call blockage hedging point is obtained. Meanwhile, a near-optimal method is presented to determine the optimal buffer sizes. The continuous flow model of the unreliable manufacturing systems is considered and the control point policy is involved in. Numerical results not only testify the method and show us its application but also to some extent show the impact of the machines＇ failure rate on the optimal buffer size.
文摘With the gradual acceleration of the urbanization process,the construction industry has been developing rapidly.As the key link to ensure the quality and safety of the project,construction management and construction quality control are of great significance to enhance the competitiveness of construction enterprises and realize sustainable development.In this paper,the effective strategy of construction management and the effective strategy of construction quality control will be discussed in depth,aiming at providing useful management and quality control strategies for construction enterprises.
基金supported by National Natural Science Foundation of China (Nos. 61272287, 61531014)the State Key Laboratory of Virtual Reality Technology and Systems (No. BUAA-VR-15KF-10)
文摘The recent development of light field cameras has received growing interest, as their rich angular information has potential benefits for many computer vision tasks. In this paper, we introduce a novel method to obtain a dense disparity map by use of ground control points(GCPs) in the light field.Previous work optimizes the disparity map by local estimation which includes both reliable points and unreliable points. To reduce the negative effect of the unreliable points, we predict the disparity at non-GCPs from GCPs. Our method performs more robustly in shadow areas than previous methods based on GCP work, since we combine color information and local disparity. Experiments and comparisons on a public dataset demonstrate the effectiveness of our proposed method.
文摘A neural network model with a special structure, which is divided into linearand nonlinear parts, was proposed for identification of a nonlinear system. In this model, thenonlinear part of the object is treated as a measured disturbance, and is compensated by a feedforward method; an adaptive pole placement algorithm is used to control the linear part of theobject. The simulation results show that the identification efficiency and accuracy are improvedwhen the new controller is applied to sintering finish point control.
文摘Limitations of various accumulators in hybrid hydraulic excavator are analyzed. A program using capacitor as the accumulator based on constant work-point control is put forward. A simulating experimental system of hybrid construction machinery is established, and experimental study on constant work-point control for parallel hybrid system with capacitor accumulator is carried out using the pressure and flow rate derived from boom cylinder of hydraulic excavator in actual work as the simulating loads. A program of double work-point control is proposed and proved by further experiments.
基金supported by the National Magnetic Confinement Fusion Science Program of China(Nos.2012GB105000 and 2014GB103000)
文摘For the advanced tokamak,the particle deposition and thermal load on the divertor is a big challenge.By moving the strike points on divertor target plates,the position of particle deposition and thermal load can be shifted.We could adjust the Poloidal Field（PF） coil current to achieve the strike point position feedback control.Using isoflux control method,the strike point position can be controlled by controlling the X point position.On the basis of experimental data,we establish relational expressions between X point position and strike point position.Benchmark experiments are carried out to validate the correctness and robustness of the control methods.The strike point position is successfully controlled following our command in the EAST operation.
文摘The main causes of non-point source pollution in Taihu Lake are the improper ways of crop production, animal husbandry, and daily runoff. The paper discusses the relationship between countrywomen and non-point source pollution control by 731 questionnaires in Weidu village and 466 questionnaires in Dapu Town. The roles of countrywomen have changed in families and they have close relationship with non-point source pollution. Furthermore, we discuss the possibility and methods of organizing countrywomen in non-point source pollution control.
基金supported by National Key Research Development Planning Project of China (2004CB619108).
文摘Coupled turbulent flow, temperature fields of the twin-roll casting strip process were simulated by three-dimensional finite element method. Based on the heat balance calculation and using inverse methods between the simulations and real experiments, the relational models among casting speed, location, and coefficient of heat transfer between molten metal and rolls in different regions are given. In the simulation, the calculated surface temperatures are in good agreement with the measured values. An on-line model of kiss point is derived by simulations and the geometry of molten pool, corresponding control strategy is also proposed.
基金Supported by Hai River Basin Integrated Water Resources Management Project of Global Environment Facility(SEPA-ZWN-3,C/II/S/09/090)
文摘[Objective] The aim was to study the control model of rural non-point source pollution.[Method] Taking Ninghe County(a typical agricultural county in Tianjin) as an example,the current development of local economy and society and characteristics of rural non-point source pollution were studied firstly,then the control model of rural non-point source pollution suitable for Ninghe County was constructed,and its environmental and economic benefits were analyzed finally.[Result] According to the sources of non-point source pollution,the control model of rural non-point source pollution in Ninghe County was divided into three modules from the aspects of planting industry,livestock raising industry and rural living.The main content of non-point source pollution control module of planting industry was composed of rational utilization of chemicals,water-saving irrigation,diversified utilization of straw etc.Non-point source pollution control module of livestock raising industry focused on the site selection of farm or raising zones,choice of raising mode,comprehensive utilization of livestock waste etc.In the non-point source pollution control module of rural living,villages were divided into two types(small town and ecological village) based on various geographical positions.In a word,these three modules were interrelated and targeted for non-point source pollution control in villages under different development situations.[Conclusion] The study could provide references for the rural non-point source pollution control in Hai River basin and other regions of Northern China.
