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Centralized Circumcentered-Reflection Method for Solving the Convex Feasibility Problem in Sparse Signal Recovery 认领 引用
1
作者 Chunmei LI Bangjun CHEN Xuefeng DUAN 《Journal of Mathematical Research with Applications》 CSCD 2026年第1期119-133,共15页
Convex feasibility problems are widely used in image reconstruction, sparse signal recovery, and other areas. This paper is devoted to considering a class of convex feasibility problem arising from sparse signal recov... Convex feasibility problems are widely used in image reconstruction, sparse signal recovery, and other areas. This paper is devoted to considering a class of convex feasibility problem arising from sparse signal recovery. We first derive the projection formulas for a vector onto the feasible sets. The centralized circumcentered-reflection method is designed to solve the convex feasibility problem. Some numerical experiments demonstrate the feasibility and effectiveness of the proposed algorithm, showing superior performance compared to conventional alternating projection methods. 展开更多
关键词 convex feasibility problem centralized circumcentered-re ection method sparse signal recovery compressed sensing
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Centralized PV Coordination Control Strategy for Unbalanced LV Distribution Networks Based on Sensitivity Coefficient Weights 认领 引用
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作者 Xuming Hu Nan Hu +3 位作者 Na Li Xinsong Zhang Xiaocen Xue Xiuyong Yu 《Energy Engineering》 EI 2026年第3期391-410,共20页
The dense integration of residential distributed photovoltaic(PV)systems into three-phase,four-wire low-voltage(LV)distribution networks results in reverse power flow and three-phase imbalance,leading to voltage viola... The dense integration of residential distributed photovoltaic(PV)systems into three-phase,four-wire low-voltage(LV)distribution networks results in reverse power flow and three-phase imbalance,leading to voltage violations that hinder the growth of rural distributed PV systems.Traditional voltage droop-based control methods regulate PV power output solely based on local voltage measurements at the point of PV connection.Due to a lack of global coordination and optimization,their efficiency is often subpar.This paper presents a centralized coordinated activeeactive power control strategy for PV inverters in rural LV distribution feeders with high PV penetration.The strategy optimizes residential PV inverter reactive and active power control to enhance voltage quality.It uses sensitivity coefficients derived from the inverse Jacobian matrix to assign adjustment weights to individual PV units and iteratively optimize their power outputs.The control sequence prioritizes reactive power increases;if the coefficients are below average or the inverters reach capacity,active power is curtailed until voltage issues are resolved.A simulation based on a real 37-node rural distribution network shows that the proposed method significantly reduces PV curtailment.Typical daily results indicate a curtailment rate of 1.47%,which is significantly lower than the 15.4%observed with the voltage droop-based control method.The total daily PV power output(measured every 15 min)increases from 5.55 to 6.41 MW,improving PV hosting capacity. 展开更多
关键词 Low-voltage distribution network PV inverter voltage violation centralized iterative optimization control curtailment rate
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Management of Centralized VOCs Exhaust Gas Purification in Chemical Industrial Parks: From Design to Acceptance 认领 引用
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作者 WANG Wanli 《外文科技期刊数据库（文摘版）工程技术》 2026年第7期032-036,共5页
With the large-scale clustering and development of chemical industrial parks, VOC emissions are characterized by dispersed sources, complex compositions, significant concentration fluctuations, and high safety risks. ... With the large-scale clustering and development of chemical industrial parks, VOC emissions are characterized by dispersed sources, complex compositions, significant concentration fluctuations, and high safety risks. The traditional decentralized treatment model used by enterprises generally suffers from unstable treatment efficiency, low resource utilization, and difficulties in operation and maintenance, making it difficult to meet the dual requirements of air pollution prevention and control as well as workplace safety. Centralized VOC exhaust gas purification systems, with their advantages of large-scale treatment, unified supervision, and coordinated control, have gradually become an important development direction for exhaust gas treatment in chemical industrial parks. This paper analyzes the practical needs for centralized treatment based on the VOCs emission sources and the physicochemical characteristics of exhaust gases in chemical industrial parks. It outlines a comprehensive set of design methods covering system architecture, collection and conveyance, pretreatment, purification processes, and safety controls, and clarifies key control points for construction quality, system commissioning, and project acceptance, with the aim of providing a technical reference for VOCs treatment projects. 展开更多
关键词 Chemical industrial parks VOCs Centralized treatment Exhaust gas purification Project acceptance
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Construction of Economic Benefit Evaluation System for Intelligent Centralized Monitoring and Operation of Substations 认领 引用
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作者 ZHAO Yun TIAN Ru 《外文科技期刊数据库（文摘版）工程技术》 2026年第2期017-021,共5页
With the continuous advancement of technology, intelligent centralized monitoring and operation of substations has become an important trend in the development of the power industry. Constructing a scientific and reas... With the continuous advancement of technology, intelligent centralized monitoring and operation of substations has become an important trend in the development of the power industry. Constructing a scientific and reasonable economic benefit evaluation system is crucial to measuring and improving its operation effect. This paper deeply analyzes the key links in the construction of the evaluation system, from the selection of evaluation indicators and determination of weights to model construction and verification, aiming to provide a strong theoretical basis and practical guidance for power enterprises in making intelligent operation decisions for substations, and promote the intelligent and efficient development of the power industry. 展开更多
关键词 substations centralized monitoring intelligent operation economic benefit evaluation system
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Centralized synthetic inertia control of inverter-based thermostatically controlled load clusters for grid frequency regulation 认领 引用
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作者 Te Zhou Meng Zhou +4 位作者 Shuai Wang Zhi Li Yang Han Tomislav Capuder Ning Zhang 《iEnergy》 EI 2025年第1期16-30,共15页
As the development of new power systems progresses,the inherent inertia of power systems continues to diminish.Centralized frequency regulation,which relies on rapid communication and real-time control,can enable inve... As the development of new power systems progresses,the inherent inertia of power systems continues to diminish.Centralized frequency regulation,which relies on rapid communication and real-time control,can enable inverter-based thermostatically controlled load(ITCL)clusters to provide virtual inertia support to the power grid.However,ITCL clusters exhibit significant discrete response characteristics,which precludes the direct integration of load-side inertia support into the synchronous unit side.To address this issue,this paper elaborates on the existing technical framework and analyzes the underlying causes of the problem.It proposes a timestamp allocation mechanism for ITCL cluster control instructions,ensuring that many ITCL terminals can be triggered at staggered times,thereby allowing the load cluster power to adhere to the inertia analog control law at any moment.Building on this foundation,the paper further examines the impact of the inertia response delay of ITCL clusters,which is based on centralized frequency regulation,on the stability of the power system.A design scheme for inertia analog control parameters is proposed,taking into account dual constraints,frequency stability and load cluster regulation capacity.Finally,the feasibility and applicability of the proposed mechanism and parameter design scheme are investigated through simulations conducted via MATLAB/Simulink. 展开更多
关键词 Thermostatically controlled load demand response frequency response centralized frequency regulation inertia analog
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Construction of Evaluation Index System for the Policy Effect of Centralized Drug Procurement 认领 引用
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作者 Huang Jiaxin Raela·Abduhilil +2 位作者 Hu Ping Liu Xinying Sun Lihua 《Asian Journal of Social Pharmacy》 CAS 2025年第4期313-324,共12页
Objective To construct an index system for evaluating the policy effect of centralized drug procurement,and to provide reference for comprehensively and systematically evaluating the policy of centralized drug procure... Objective To construct an index system for evaluating the policy effect of centralized drug procurement,and to provide reference for comprehensively and systematically evaluating the policy of centralized drug procurement.Methods Through combing the policies and literature research,the focus and expected goal of China’s centralized drug procurement policy were clarified.On the basis of policy concerns,combined with some theories and the implementation of drug centralized procurement policy,a primary evaluation index system was constructed.The index system was determined by expert consultation,and the weight of each index was calculated by analytic hierarchy process.Results and Conclusion The questionnaire recovery rates of the two rounds of expert consultation were 88.23%and 100%,the coefficients of authority of experts were 0.86 and 0.80,and the expert coordination coefficients were 0.338 and 0.294,respectively.Finally,the evaluation index system for the policy of centralized drug procurement was established,which included 4 first-level indicators,10 second-level indicators and 23 third-level indicators.The evaluation index system constructed in this paper can not only make up for the deficiency of systematic evaluation of the policy effect of the current centralized drug procurement,but also provide reference for further improving this policy. 展开更多
关键词 centralized drug procurement stakeholder policy evaluation
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Quantitative Analysis of the Policy of Centralized Drug Procurement Based on PMC Index Model 认领 引用
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作者 Duan Xiaoxiang Wang Shuling 《Asian Journal of Social Pharmacy》 CAS 2025年第3期222-235,共14页
Objective To quantitatively analyze the policy of centralized drug procurement centralized drug procurement in order to provide reference for the subsequent policy formulation and improvement.Methods Text mining metho... Objective To quantitatively analyze the policy of centralized drug procurement centralized drug procurement in order to provide reference for the subsequent policy formulation and improvement.Methods Text mining method was used to process 15 centralized drugs procurement policies issued at the national level during 2015-2022,and a PMC index evaluation model of centralized drug procurement policies was established.Then,15 centralized drug procurement policies were quantitatively analyzed from the overall and comparative perspective through an evaluation model.Results and Conclusion The average PMC index of 15 centralized drug procurement policies was 6.95,which was acceptable on the whole.Among them,eight were excellent and seven were acceptable.As to the first-order variables,the centralized drugs procurement policy still lacks incentives and constraints.The comparative results show that there are differences in the content and structure of policies,but they are strongly related to each other.Chinese centralized drug procurement policy has been basically formed,which is closely related to medical insurance and medical policies.However,it is still necessary to pay attention to the structure of the policy to ensure the elaboration of the policy content. 展开更多
关键词 centralized drug procurement PMC index policy quantitative analysis
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Study on the Impact of Humidity Control Strategy on Energy Saving Effect of Centralized Central Air Conditioning System 认领 引用
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作者 Xiaolian Lin 《Journal of Electronic Research and Application》 2025年第4期303-309,共7页
As an indispensable part of modern buildings,centralized central air conditioning systems play an important role in maintaining the comfort and air quality of the indoor environment.However,with the increasing energy ... As an indispensable part of modern buildings,centralized central air conditioning systems play an important role in maintaining the comfort and air quality of the indoor environment.However,with the increasing energy consumption,how to improve the energy efficiency ratio of air conditioning systems and reduce energy consumption has become an important issue in research and practice.The purpose of this paper is to discuss the impact of humidity control strategies on energy saving in centralized central air conditioning systems,with a view to providing a theoretical basis and practical guidance for realizing building energy efficiency. 展开更多
关键词 Centralized central air conditioning system Energy saving potential Humidity control strategy Energy saving effect assessment
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The Management Practice and Reflection of Centralized Drug Procurement in Hospitals 认领 引用
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作者 Yuchen Li 《Proceedings of Business and Economic Studies》 2025年第3期54-59,共6页
The centralized procurement of drugs in the medical system is a key link,which not only affects the economic effect of institutions,but also relates to the medical quality and patient safety.In the current era,central... The centralized procurement of drugs in the medical system is a key link,which not only affects the economic effect of institutions,but also relates to the medical quality and patient safety.In the current era,centralized drug procurement in hospitals can meet the needs of most patients;however,the specific steps of the work still need to be optimized.Starting from the level of hospital drug centralized procurement work,this paper discusses the policy background,analyzes the practice of drug centralized procurement in tertiary hospitals,and provides specific work management suggestions,aiming to improve work efficiency and serve as a reference for optimizing subsequent hospital drug centralized procurement work. 展开更多
关键词 Hospital drugs Centralized procurement work Management practice Suggestions
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Ammonia pollution characteristics of centralized drinking water sources in China 认领 引用 被引量：16
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作者 Qing Fu Binghui Zheng +2 位作者 Xingru Zhao Lijing Wang Changming Liu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2012年第10期1739-1743,共5页
The characteristics of ammonia in drinking water sources in China were evaluated during 2005-2009. The spatial distribution and seasonal changes of ammonia in different types of drinking water sources of 22 provinces,... The characteristics of ammonia in drinking water sources in China were evaluated during 2005-2009. The spatial distribution and seasonal changes of ammonia in different types of drinking water sources of 22 provinces, 5 autonomous regions and 4 municipalities were investigated. The levels of ammonia in drinking water sources follow the order of fiver 〉 lakeeservoir 〉 groundwater. The levels of ammonia concentration in river sources gradually decreased from 2005 to 2008, while no obvious change was observed in the lakeseservoirs and groundwater drinking water sources. The proportion of the type of drinking water sources is different in different regions. In river drinking water sources, the ammonia level was varied in different regions and changed seasonally. The highest value and wide range of annual ammonia was found in South East region, while the lowest value was found in Southwest region. In lakeeservoir drinking water sources, the ammonia levels were not varied obviously in different regions. In underground drinking water sources, the ammonia levels were varied obviously in different regions due to the geological permeability and the natural features of regions. In the drinking water sources with higher ammonia levels, there are enterprises and wastewater drainages in the protected areas of the drinking water sources. 展开更多
关键词 ammonia centralized drinking water sources distribution China
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Centralized isolation of Helicobacter pylori from multiple centers and transport condition influences 认领 引用 被引量：9
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作者 Ya-Nan Gong You-Ming Li +27 位作者 Ning-Min Yang Hong-Zhang Li Feng Guo Lang Lin Qun-Ying Wang Jia-Kun Zhang Zi-Zhong Ji Ji-Bo Mao Jun-Liang Mao Zheng-Chao Shi Wu-Heng Tang Xin-Jian Zhu Wei Shao Xiao-Feng Zhang Xing-Hua Wang Yue-Feng Tong Mi-Zu Jiang Guang-Lan Chen Zhi-Yong Wang Hui-Min Tu Guo-Fa Jiang Jian-Sheng Wu Xu-Peng Chen Qiu-Long Ding Hong Ouyang Feng-Zhe Jin Yan-Li Xu Jian-Zhong Zhang 《World Journal of Gastroenterology》 SCIE CAS 2015年第3期944-952,共9页
AIM:To evaluate the efficacy of centralized culture and possible influencing factors.METHODS:From January 2010 to July 2012,66452 patients with suspected Helicobacter pylori(H.pylori) infection from 26 hospitals in Zh... AIM:To evaluate the efficacy of centralized culture and possible influencing factors.METHODS:From January 2010 to July 2012,66452 patients with suspected Helicobacter pylori(H.pylori) infection from 26 hospitals in Zhejiang and Jiangsu Provinces in China underwent gastrointestinal endoscopy.Gastric mucosal biopsies were taken from the antrum for culture.These biopsies were transported under natural environmental temperature to the central laboratory in Hangzhou city and divided into three groups based on their transport time:5,24 and 48 h.The culture results were reported after 72 h and the positive culture rates were analyzed by a χ2 test.An additional 5736 biopsies from H.pylori-positive patients(5646 rapid urease test-positive and 90 14C-urease breath test-positive) were also cultured for quality control in the central laboratory setting.RESULTS:The positive culture rate was 31.66%(21036/66452) for the patient samples and 71.72%(4114/5736) for the H.pylori-positive quality control specimens.In the 5 h transport group,the positiveculture rate was 30.99%(3865/12471),and 32.84%(14960/45553) in the 24 h transport group.In contrast,the positive culture rate declined significantly in the 48 h transport group(26.25%; P < 0.001).During transportation,the average natural temperature increased from 4.67 to 29.14℃,while the positive culture rate declined from 36.67%(1462/3987) to 24.12%(1799/7459).When the temperature exceeded 24℃,the positive culture rate decreased significantly,especially in the 48 h transport group(23.17%).CONCLUSION:Transportation of specimens within 24 h and below 24℃ is reasonable and acceptable for centralized culture of multicenter H.pylori samples. 展开更多
关键词 Centralized isolation Helicobacter pylori Influenc
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Facilities for Centralized Isolation and Quarantine for the Observation and Treatment of Patients with COVID-19 认领 引用 被引量：7
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作者 Xianliang Wang Jiao Wang +10 位作者 Jin Shen John SJi Lijun Pan Hang Liu Kangfeng Zhao Li Li Bo Ying Lin Fan Liubo Zhang Lin Wang Xiaoming Shi 《Engineering》 SCIE EI CAS CSCD 2021年第7期908-913,共6页
The coronavirus disease 2019(COVID-19)pandemic increased the burden on many healthcare systems and in the process,exposed the need for medical resources and physical space.While few studies discussed the efficient uti... The coronavirus disease 2019(COVID-19)pandemic increased the burden on many healthcare systems and in the process,exposed the need for medical resources and physical space.While few studies discussed the efficient utilization of medical resources and physical space so far.Therefore,this study aimed to summarize experiences related to facilities used for centralized isolation for medical observation and treatment during the COVID-19 pandemic in China and to provide suggestions to further improve the management of confirmed cases,suspected cases,and close contacts.In China,three types of facilities for centralized isolation(Fangcang shelter hospitals,refitted non-designated hospitals,and quarantine hotels)underwent retrofitting for the treatment and isolation of confirmed and suspected cases.These facilities mitigated the immediate high demand for space.Moreover,in order to minimize infection risks in these facilities,regulators and governmental agencies implemented new designs,management measures,and precautionary measures to minimize infection risk.Other countries and regions could refer to China’s experience in optimally allocating social resources in response to the COVID-19 pandemic.As a conclusion,government should allocate social resources and construct centralized isolation and quarantine facilities for an emergency response,health authorities should issue regulations for centralized isolation facilities and pay strict attention to the daily management of these facilities,a multidisciplinary administration team is required to support the daily operation of a centralized isolation facility,in-depth studies and international collaboration on the centralized isolation policy are encouraged. 展开更多
关键词 Centralized isolation Risk control Infectious patients Close contacts Coronavirus disease
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Analysis of Ornidazole Injection in Clinical Use at Post-marketing Stage by Centralized Hospital Monitoring System 认领 引用 被引量：5
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作者 Ying ZHAO Zhe CHEN +3 位作者 Pu HUANG Si-wei ZHENG Qi-ling XU Chen SHI 《Current Medical Science》 SCIE CAS 2019年第5期836-842,共7页
This study aims to analyze the clinical use of ornidazole injection at the post-marketing stage by centralized hospital monitoring system method,and investigate its widespread use in patients,in order to regulate and ... This study aims to analyze the clinical use of ornidazole injection at the post-marketing stage by centralized hospital monitoring system method,and investigate its widespread use in patients,in order to regulate and guide the rational drug use,improve the drug specificity and provide a basis for drug therapy.The study adopts a prospective,multi-center,large sample size,centralized hospital monitoring system.We selected five leading hospitals in Hubei province,and observed the inpatients who received the ornidazole injection from July 1,2015 to October 31,2015.The basic information of patients was recorded,as well as the drug use and adverse events.The statistical analysis was performed based on these data.A total of 4396 individuals were enrolled in this study,most of them were middle-aged female patients and the ornidazole injection was mainly used as prophylactic prior to surgery to prevent the infections,and surgical treatment of anaerobic infections,abdominal infections and pelvic infections.The irrational drug use existed mainly in the prescribing and administration process,including unreasonable dosing frequency,rapid intravenous drip speed and extended duration of drug use.Eleven cases of adverse reactions were collected during the monitoring,incidence rate of adverse reactions was 2.5‰;adverse drug reactions occurred within 30 min.The study results fully reflected the usage of ornidazole injection in the real world.Based on the study,we calculated the adverse reaction incidence of ornidazole and identified the risk factors which may affect the safety of ornidazole injection.Study results strongly recommend that the manufacturers should publish standards for inpatient use and doctors should prescribe with caution accordingly. 展开更多
关键词 ornidazole injection centralized hospital monitoring system post-marketing reassessment clinical use adverse reaction
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An application-layer based centralized information access control for VPN 认领 引用 被引量：4
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作者 欧阳凯 周敬利 +1 位作者 夏涛 余胜生 《Journal of Zhejiang University-SCIENCE A》 EI CAS 2006年第2期240-249,共10页
With the rapid development of Virtual Private Network (VPN), many companies and organizations use VPN to implement their private communication. Traditionally, VPN uses security protocols to protect the confidentiality... With the rapid development of Virtual Private Network (VPN), many companies and organizations use VPN to implement their private communication. Traditionally, VPN uses security protocols to protect the confidentiality of data, the message integrity and the endpoint authentication. One core technique of VPN is tunneling, by which clients can access the in- ternal servers traversing VPN. However, the tunneling technique also introduces a concealed security hole. It is possible that if one vicious user can establish tunneling by the VPN server, he can compromise the internal servers behind the VPN server. So this paper presents a novel Application-layer based Centralized Information Access Control (ACIAC) for VPN to solve this problem. To implement an efficient, flexible and multi-decision access control model, we present two key techniques to ACIAC—the centralized management mechanism and the stream-based access control. Firstly, we implement the information center and the constraints/events center for ACIAC. By the two centers, we can provide an abstract access control mechanism, and the material access control can be decided dynamically by the ACIAC’s constraint/event mechanism. Then we logically classify the VPN communication traffic into the access stream and the data stream so that we can tightly couple the features of VPN communication with the access control model. We also provide the design of our ACIAC prototype in this paper. 展开更多
关键词 Virtual private network Access control Tunneling Centralized management Stream
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Making the World More Sustainable: Enabling Localized Energy Generation and Distribution on Decentralized Smart Grid Systems 认领 引用 被引量：2
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作者 Harrison John Bhatti Mike Danilovic 《World Journal of Engineering and Technology》 2018年第2期350-382,共33页
Smart grid is an idea of upgradation of the traditional electric grid infrastructure. The efficiency of the existing electrical grid can be automated by integrating with innovative technical equipment such as:?high-te... Smart grid is an idea of upgradation of the traditional electric grid infrastructure. The efficiency of the existing electrical grid can be automated by integrating with innovative technical equipment such as:?high-tech forecasting system, digital sensors, advanced two-way communication and two-way power flow systems. Smart grid establishes an interface between utility and consumer which helps to use energy, based on the preferences of price, eco-friendly and without technical system issues. It empowers the grid to be more secure, reliable and efficient. The peer-reviewed articles and published government reports have been reviewed, based on the analysis of technical characteristics of power generation systems, eco-friendly sources of power generations, cost reduction, functionality and design of traditional grid versus smart grid. Furthermore, the innovative technologies that enable the grid to integrate with decentralized power generation system efficiently have been considered. This paper claims that in this modern era, it is arduous for traditional grid to fulfill the rising demand of electricity, along with sustainable, eco-friendly and stable power supply, as it cannot be efficiently integrated with decentralized and localized power generation systems and renewable energy sources. The result of this paper shows that decentralized and localized power generation systems are located close to end-users which decrease the transmission and supply cost of electricity. Innovative technologies allow the decentralized and localized power generation systems to be integrated with renewable energy sources which help to reduce the cost of utility services and provide clean energy. Moreover, technological advancement played a decisive role in enabling the electrical system to be more efficient. Electrical reliability can be improved,?greenhouse gas emissions can be reduced, renewable energy sources can efficiently be integrated,?and?rising demand for electricity can be met by embedding advanced applications and technological equipment in the electrical grid. 展开更多
关键词 Smart Grid Traditional Grid Centralized Power Generation Decentralized Power Generation Innovative Technologies
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Quantitative analysis of distributed and centralized development of renewable energy 认领 引用 被引量：7
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作者 Xiaolu Wang Nana Li +2 位作者 Wei Sun Shan Xu Zedong Zhang 《Global Energy Interconnection》 2018年第5期576-584,共9页
Global renewable energy has maintained a steady growth in recent years, mainly fostered by national policies and increasing demand. Analyzing the experience of renewable energy development in developed countries can b... Global renewable energy has maintained a steady growth in recent years, mainly fostered by national policies and increasing demand. Analyzing the experience of renewable energy development in developed countries can be important to provide reference and guidance for its adoption in other countries. First, we compare and summarize definitions of distributed generation from 18 leading countries and organizations in renewable energy. On this basis, we provide three basic characteristics for successful distributed generation using renewable resources. Then, we empirically analyze the distributed and centralized development of renewable energy in Germany with focus on wind and photovoltaic power. We determined that 95% of the photovoltaic generation and 85% of the wind power generation is distributed in Germany, suggesting that the most suitable generation mode for renewable energy is the distributed approach. 展开更多
关键词 Renewable energy Development mode Distributed generation Centralized generation
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Resource-saving scheduling scheme for centralized target tracking in multiple radar system under automatic blanket jamming 认领 引用 被引量：3
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作者 Zhengjie LI Yujie WEI +2 位作者 Junwei XIE Haowei ZHANG Yu TIAN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2024年第5期349-362,共14页
This paper investigates the problem of Joint Radar Node Selection and Power Allocation(JRNSPA)in the Multiple Radar System(MRS)in the blanket jamming environment.Each radar node independently tracks moving target and ... This paper investigates the problem of Joint Radar Node Selection and Power Allocation(JRNSPA)in the Multiple Radar System(MRS)in the blanket jamming environment.Each radar node independently tracks moving target and subsequently transmits the raw observation data to the fusion center,which formulates a centralized tracking network structure.In order to establish a practical blanket jamming environment,we suppose that each target carries the self-defense jammer which automatically implements blanket jamming to the radar nodes that exceed the preset interception probability.Subsequently,the Predicted Conditional Cramer-Rao Lower Bound(PC-CRLB)is derived and utilized as the tracking accuracy criterion.Aimed at ensuring both the tracking performance and the Low Probability of Intercept(LPI)performance,the resource-saving scheduling model is formulated to minimize the transmit power consumption while meeting the requirements of tracking accuracy.Finally,the Modified Zoutendijk Method Of Feasible Directions(MZMFD)-based two-stage solution technique is adopted to solve the formulated non-convex optimization model.Simulation results show the effectiveness of the proposed JRNSPA scheme. 展开更多
关键词 Multiple Radar System(MRS) Centralized target tracking Resource scheduling Blanket jamming Low Probability of Intercept(LPI)
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Analysis on the Mode of Centralized Material Procurement of Group City Gas Enterprises 认领 引用
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作者 CAO Qili 《外文科技期刊数据库（文摘版）经济管理》 2021年第11期121-124,共4页
With the continuous development of the domestic natural gas market and the increasing trend of group operation of city gas enterprises, each large and medium-sized gas group enterprise cannot achieve cost reduction, e... With the continuous development of the domestic natural gas market and the increasing trend of group operation of city gas enterprises, each large and medium-sized gas group enterprise cannot achieve cost reduction, efficiency improvement and market competitiveness without an efficient centralized procurement system. However, the centralized procurement mode of gas enterprises has gradually deepened from the simple bundle procurement to the standardized and scientific centralized procurement supply chain mode. Based on the summary and analysis of the material centralized purchase mode of a medium-sized city gas group in recent ten years, this paper further explores the idea of the construction of centralized purchase supply chain. 展开更多
关键词 city gas group centralized procurement of materials centralized procurement supply chain
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Controlling the dynamic behavior of decentralized cluster through centralized approaches 认领 引用
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作者 袁大明 王培龙 +6 位作者 王鹏 马星宇 汪楚云 王璟 陈怀城 王高 叶方富 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第6期46-54,共9页
How to control the dynamic behavior of large-scale artificial active matter is a critical concern in experimental research on soft matter, particularly regarding the emergence of collective behaviors and the formation... How to control the dynamic behavior of large-scale artificial active matter is a critical concern in experimental research on soft matter, particularly regarding the emergence of collective behaviors and the formation of group patterns. Centralized systems excel in precise control over individual behavior within a group, ensuring high accuracy and controllability in task execution. Nevertheless, their sensitivity to group size may limit their adaptability to diverse tasks. In contrast, decentralized systems empower individuals with autonomous decision-making, enhancing adaptability and system robustness. Yet, this flexibility comes at the cost of reduced accuracy and efficiency in task execution. In this work, we present a unique method for regulating the centralized dynamic behavior of self-organizing clusters based on environmental interactions. Within this environment-coupled robot system, each robot possesses similar dynamic characteristics, and their internal programs are entirely identical. However, their behaviors can be guided by the centralized control of the environment, facilitating the accomplishment of diverse cluster tasks. This approach aims to balance the accuracy and flexibility of centralized control with the robustness and task adaptability of decentralized control. The proactive regulation of dynamic behavioral characteristics in active matter groups, demonstrated in this work through environmental interactions, holds the potential to introduce a novel technological approach and provide experimental references for studying the dynamic behavior control of large-scale artificial active matter systems. 展开更多
关键词 self-organizing system centralized control dynamics regulation
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Symbol Error Probability of Incremental Relaying with Distributed/Centralized Relay Selection 认领 引用
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作者 Raed Alhamad Hatem Boujemaa 《China Communications》 SCIE CSCD 2020年第11期141-155,共15页
In this paper,we derive the Symbol Error Probability(SEP)of cooperative systems with incremental relaying and Distributed Relay Selection(DRS).The relays remain idle when the Signal to Noise Ratio(SNR)between the sour... In this paper,we derive the Symbol Error Probability(SEP)of cooperative systems with incremental relaying and Distributed Relay Selection(DRS).The relays remain idle when the Signal to Noise Ratio(SNR)between the source and destination is larger than T.Otherwise,we activate a relay using DRS.Relay nodes transmit only if their SNR is larger than thresholdβ.If the SNRs of more than two relays is larger thanβ,there is a collision and the destination uses only the received signal from the source.If all relays have SNR less thanβ,no relay is chosen.Thresholdβis optimized to yield the lowest SEP at the destination.Our results are compared to centralized relay selection using opportunistic Amplify and Forward(OAF),Partial and Reactive Relay Selection(PRS and RRS).We compare our results to computer simulations for Rayleigh fading channels. 展开更多
关键词 incremental relaying distributed relay selection centralized relay selection rayleigh fading channels
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