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Optimal Research on Equipment Maintenance Unequal Time-Interval Based on Simulation 被引量:2
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作者 WANG Shaohua ZHANG Shixin +1 位作者 XU Longyang XING Ruxin 《Journal of Shanghai Jiaotong university(Science)》 EI 2019年第4期485-489,共5页
The paper deals with systems suffered from gradual deterioration. To avoid functional failures and disastrous consequences, such systems should be monitored and preventively maintained. And to promote the maintenance ... The paper deals with systems suffered from gradual deterioration. To avoid functional failures and disastrous consequences, such systems should be monitored and preventively maintained. And to promote the maintenance effectiveness, an unequal time-interval maintenance policy was brought forward to substitute fixedinterval preventive maintenance strategy. At the same time, preventive and corrective maintenance actions are both assumed to be imperfect, and their impact on the system is expressed by the increment of failure rate. The case study shown that the unequal time-interval maintenance policy proposed in the paper is of help to promote the availability of the system. 展开更多
关键词 MONTE Carlo SIMULATION unequal time-interval imperfect maintenance
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Sources appointment and health risks of PM_(2.5)-bound trace elements in a coastal city of southeastern China 被引量:5
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作者 Ziyi Lin Xiaolong Fan +8 位作者 Gaojie Chen Youwei Hong Mengren Li Lingling Xu Baoye Hu Chen Yang Yanting Chen Zhiqian Shao Jinsheng Chen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2024年第4期561-571,共11页
To gain a comprehensive understanding of sources and health risks of trace elements in an area of China with high population densities and low PM_(2.5)concentrations,15 trace elements(Al,K,Ca,Ti,V,Cr,Mn,Fe,Ni,Cu,Zn,As... To gain a comprehensive understanding of sources and health risks of trace elements in an area of China with high population densities and low PM_(2.5)concentrations,15 trace elements(Al,K,Ca,Ti,V,Cr,Mn,Fe,Ni,Cu,Zn,As,Sn,Ba,Pb)in PM_(2.5)were monitored from December 2020 to November 2021 in a representative city,Xiamen.The concentrations of trace elements in Xiamen displayed an obvious seasonal variation and were dominated by K,Fe,Al,Ca and Zn.Based on Positive Matrix Factorization analysis,source appointment revealed that the major sources of trace elements in Xiamen were traffic,dust,biomass and firework combustion,industrial manufacture and shipping emission.According to health risk assessment combined with the source appointment results,it indicated that the average noncarcinogenic risk was below the threshold and cancer risk of four hazardous metals(Cr,Ni,As,Pb)exceeded the threshold(10^(-6)).Traffic-related source had almost half amount of contribution to the health risk induced by PM_(2.5)-bound trace elements.During the dust transport period or Spring Festival period,the health risks exceeded an acceptable threshold even an order of magnitude higher,suggesting that the serious health risks still existed in low PM_(2.5)environment at certain times.Health risk assessment reminded that the health risk reduction in PM_(2.5)at southeastern China should prioritize traffic-related hazardous trace elements and highlighted the importance of controlling vehicles emissions in the future. 展开更多
关键词 PM_(2.5)-bound trace elements Seasonal variations Source appointment Health risks Traffic-related source
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Appointment scheduling with customer impatience based on operating cost model 被引量:1
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作者 Song Minshan Zhang Yulin 《Journal of Southeast University(English Edition)》 EI CAS 2019年第2期252-256,共5页
An appointment scheduling problem is studied with the consideration of customer impatience.On the assumption that both the time of leaving queue and the time of service are exponentially distributed,in order to minimi... An appointment scheduling problem is studied with the consideration of customer impatience.On the assumption that both the time of leaving queue and the time of service are exponentially distributed,in order to minimize the joint cost,the optimal appointment schedule of the fixed number of customers is studied.The joint cost function is composed of customers expected delay time and service availability time.The expected delay time of each customer in the queue is recursively computed in terms of customer interarrival time.Furthermore,the effect of impatience on the optimal schedule as well as the total operating cost is studied.The results show that as the impatience rate increases,the optimal interarrival time becomes shorter and the interarrival time of the last few customers gradually approaches that of the customers in the middle.In addition,impatient behaviors can increase the joint cost. 展开更多
关键词 appointment customer impatience queueing theory single server
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Machine learning-based prediction models for patients no-show in online outpatient appointments 被引量:1
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作者 Guorui Fan Zhaohua Deng +1 位作者 Qing Ye Bin Wang 《Data Science and Management》 2021年第2期45-52,共8页
With the development of information and communication technologies,all public tertiary hospitals in China began to use online outpatient appointment systems.However,the phenomenon of patient no-shows in online outpati... With the development of information and communication technologies,all public tertiary hospitals in China began to use online outpatient appointment systems.However,the phenomenon of patient no-shows in online outpatient appointments is becoming more serious.The objective of this study is to design a prediction model for patient no-shows,thereby assisting hospitals in making relevant decisions,and reducing the probability of patient no-show behavior.We used 382,004 original online outpatient appointment records,and divided the data set into a training set(N_(1)=286,503),and a validation set(N_(2)=95,501).We used machine learning algorithms such as logistic regression,k-nearest neighbor(KNN),boosting,decision tree(DT),random forest(RF)and bagging to design prediction models for patient no-show in online outpatient appointments.The patient no-show rate of online outpatient appointment was 11.1%(N=42,224).From the validation set,bagging had the highest area under the ROC curve and AUC value,which was 0.990,followed by random forest and boosting models,which were 0.987 and 0.976,respectively.In contrast,compared with the previous prediction models,the area under ROC and AUC values of the logistic regression,decision tree,and k-nearest neighbors were lower at 0.597,0.499 and 0.843,respectively.This study demonstrates the possibility of using data from multiple sources to predict patient no-shows.The prediction model results can provide decision basis for hospitals to reduce medical resource waste,develop effective outpatient appointment policies,and optimize operations. 展开更多
关键词 Online health Online outpatient appointment Patient no-show Prediction model Machine learning
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Design and Implementation of Clinic Appointment Registration System
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作者 Xiuju Zhan Xiufeng Liu 《Engineering(科研)》 2013年第10期527-529,共3页
Clinic Appointment Registration System is an important way to see a doctor, and it’s also a preliminary tool for storage and management of clinic medical records. This new system was developed using Visual Studio 200... Clinic Appointment Registration System is an important way to see a doctor, and it’s also a preliminary tool for storage and management of clinic medical records. This new system was developed using Visual Studio 2008 and C#.NET as the development environment and tools and Microsoft Access 2003 as the database to store the medical data based on Browse/Server (B/S) model. The system consists of several data operation functions including appointment registration, data management (e.g. addition, deletion and searching), data backup and recovery, etc., thus, achieve key research ob-jectives. 展开更多
关键词 CLINIC appointment REGISTRATION System C#.NET B/S Mode
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Appointment of Dr. Xue-Long JIANG as the Associate Editor-in-Chief of Zoological Research
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《Zoological Research》 CAS CSCD 2016年第2期66-66,共1页
We are very pleased to announce that we have invited Dr. Xue-Long JIANG to serve as the Associate Editor-in-Chief for Zoological Research (ZR), effective from 1 March, 2016. Dr. JIANG, Professor and principle invest... We are very pleased to announce that we have invited Dr. Xue-Long JIANG to serve as the Associate Editor-in-Chief for Zoological Research (ZR), effective from 1 March, 2016. Dr. JIANG, Professor and principle investigator from the Laboratory of Mammal Ecology and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, has worked with ZR since 2006 as a member of the editorial board and has played an active and important role in maintaining ZR as a respected academic publishing platform. Currently, he also works as the Associate Editor-in-Chief of Acta Thefiologica Sinica, Mammal Research and as a senior editorial board member of Biodiversity Science. 展开更多
关键词 appointment of Dr Xue-Long JIANG as the Associate Editor-in-Chief of Zoological Research LONG
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Appointment of Dr. Wai-Yee Chan as the Associate Editor-in-Chief of Zoological Research
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《Zoological Research》 CAS CSCD 2016年第5期314-314,共1页
We are very pleased to announce that we have invited Dr. Wai-Yee Chan, Professor and Director of School of Biomedical Sciences, The Chinese University of Hong Kong, to serve as the Associate Editor- in-Chief for Zoolo... We are very pleased to announce that we have invited Dr. Wai-Yee Chan, Professor and Director of School of Biomedical Sciences, The Chinese University of Hong Kong, to serve as the Associate Editor- in-Chief for Zoological Research (ZR), effective 1 September, 2016. 展开更多
关键词 appointment of Dr Wai-Yee Chan as the Associate Editor-in-Chief of Zoological Research
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Quantum Algorithm for Appointment Scheduling
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作者 Wenbin Yu Yinsong Xu +2 位作者 Wenjie Liu Alex Xiangyang Liu Baoyu Zheng 《Journal of Quantum Computing》 2019年第2期111-118,共8页
Suppose a practical scene that when two or more parties want to schedule anappointment, they need to share their calendars with each other in order to make itpossible. According to the present result the whole communi... Suppose a practical scene that when two or more parties want to schedule anappointment, they need to share their calendars with each other in order to make itpossible. According to the present result the whole communication cost to solve thisproblem should be their calendars’ length by using a classical algorithm. In this work, weinvestigate the appointment schedule issue made by N users and try to accomplish it inquantum information case. Our study shows that the total communication cost will bequadratic times smaller than the conventional case if we apply a quantum algorithm in theappointment-scheduling problem. 展开更多
关键词 Quantum algorithm appointment scheduling quantum speed-up
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The impact of out-of-pocket expenditures on missed appointments at HIV r care and treatment centers in Northern Tanzania
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作者 Carl Mhina Hayden Bosworth +6 位作者 John A.Bartlett Helene Vilme Joyce H.Mosha Deborah F.Shoo Tom J.Kakumbi Glory Jacob Charles Muiruri 《Global Health Journal》 2021年第2期90-96,共7页
Background:Missed clinic appointments negatively impact clinic patient flow and health outcomes of people living with HIV(PLHIV).PLHIV likelihood of missing clinic appointments is associated with direct and indirect e... Background:Missed clinic appointments negatively impact clinic patient flow and health outcomes of people living with HIV(PLHIV).PLHIV likelihood of missing clinic appointments is associated with direct and indirect expenditures made while accessing HIV care.The objective of this study was to examine the relationship between out-of-pocket(OOP)health expenditures and the likelihood of missing appointments.Method:Totally 618 PLHIV older than 18 years attending two HIV care and treatment centres(CTC)in Northern Tanzania were enrolled in the study.Clinic attendance and clinical characteristics were abstracted from medical records.Information on OOP health expenditures,demographics,and socio-economic factors were self-reported by the participants.We used a hurdle model.The first part of the hurdle model assessed the marginal effect of a one Tanzanian Shillings(TZS)increase in OOP health expenditure on the probability of having a missed appointment and the second part assessed the probability of having missed appointments for those who had missed an appointment over the study period.Results:Among these 618 participants,242(39%)had at least one missed clinic appointment in the past year.OOP expenditure was not significantly associated with the number of missed clinic appointments.The median amount of OOP paid was 5100 TZS per visit,about 7%of the median monthly income.Participants who were separated from their partners(adjusted odds ratio[AOR]=1.83,95%confidence interval[CZ]:1.11-8.03)and those aged above 50 years(AOR=2.85,95%CI:1.01-8.03)were significantly associated with missing an appointment.For those who had at least one missed appointment over the study period,the probability of missing a clinic appointment was significantly associated with seeking care in a public CTC(P=0.49,95%CI:0.88-0.09)and aged between>25-35 years(P=0.90,95%CI:0.11-1.69).Conclusion:Interventions focused on improving compliance to clinic appointments should target public CTCs,PLHIV aged between>25-35 years,above 50 years of age and those who are separated from their partners. 展开更多
关键词 Missed clinic appointments Out-of-pocket expenditure HIV Tanzania
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An Extended Bailey-welch Rule with No-show and Walk-in For Outpatient Appointment Scheduling
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作者 MEI Zhihuang HUANG Ronghuan TAO Jiping 《International English Education Research》 2015年第10期34-37,共4页
In clinic's appointment scheduling system no-shows have been a significant and confirmed issue with a bad influence on patient accessibility and clinic efficiency.The problem of walk-in has often been seen as the ... In clinic's appointment scheduling system no-shows have been a significant and confirmed issue with a bad influence on patient accessibility and clinic efficiency.The problem of walk-in has often been seen as the opposite of no-show problem.In this work we revisit a walk-in admitting based approach to mitigate the bad influence of no-show without overbooking.First we establish a model which utilizes marginal benefit objective function to balance the interests of the clinic,the patient and the doctor,we prove that no-show and walk-in cancels out each other straightly has a bad property.Then we propose a new rule which is an extension of the well-known Bailey-Welch rule,the simulation results show that our rule has an improvement comparing with the common rule that cancels them out straightly. 展开更多
关键词 service operation appointment scheduling no-show walk-in service improvement
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Understanding the antecedents of patients’missed appointments:the perspective of attribution theory
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作者 Guorui Fan Zhaohua Deng Lai CLiu 《Data Science and Management》 2023年第4期247-255,共9页
The occurrence of missed appointments from online outpatient bookings significantly hinders the operational efficiency of outpatient services.This study aimed to investigate various factors influencing patients’misse... The occurrence of missed appointments from online outpatient bookings significantly hinders the operational efficiency of outpatient services.This study aimed to investigate various factors influencing patients’missed appointments from online outpatient bookings.Drawing on attribution theory,an empirical analysis was conducted using 382,004 authentic online outpatient appointments.The empirical findings revealed that appointment lead-time,appointment time,weekday appointments,online doctor rating,appointment doctor’s expertise,patient distance,and previous outpatient visit experience significantly influenced patients’missed appointment behaviors from online outpatient bookings.Importantly,previous outpatient experience positively moderated the relationship between the appointment doctor’s expertise and patients’missed-appointment behavior.This study provides insights into the factors influencing patients’missed-appointment behavior from online outpatient bookings.It further offers a theoretical foundation for medical institutions in China to mitigate the likelihood and adverse effects of patients’missed-appointment behavior from online outpatient bookings. 展开更多
关键词 Online healthcare Outpatient appointment system Patients'missed appointments Moderating effect
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The Application of Appointment System in the Reform of Personnel System in Public Institutions
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作者 YAO Man 《外文科技期刊数据库(文摘版)经济管理》 2021年第7期069-072,共6页
The reform and innovation of the personnel management system in government organs and institutions is to eliminate the shortcomings on the basis of the past human resources management, find the best human resources ma... The reform and innovation of the personnel management system in government organs and institutions is to eliminate the shortcomings on the basis of the past human resources management, find the best human resources management plan and create a positive personnel management system. Among the current personnel management systems in our country, the appointment system is the one chosen by many institutions. The appointment system can achieve the overall goal of human resources management. The influence and effectiveness of the appointment system are crucial to promote the sustainable development trend of government agencies and institutions. This paper analyzes the specific contents and functions of the reform and innovation of the appointment system and personnel management system in government institutions, and discusses the characteristics and practical significance of the reform and innovation of the appointment system in government institutions. The countermeasures for the reform and innovation of the personnel management system of the appointment system have been deeply and scientifically studied, which has certain practical value and promotes the long-term development of government organs and institutions. 展开更多
关键词 appointment system public institution personnel system reform innovative application
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Visual analysis of shared medical appointments based on CiteSpace
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作者 Xiao-Chen Sun Yang Liu +1 位作者 Zi-Ran Sun Hong-Mei Ma 《Nursing Communications》 2023年第4期1-5,共5页
Objective:Analyze the research hotspots and frontiers of shared outpatient service,and provide a reference for researchers in this field to carry out follow-up research.Methods:Search the Web of Science core collectio... Objective:Analyze the research hotspots and frontiers of shared outpatient service,and provide a reference for researchers in this field to carry out follow-up research.Methods:Search the Web of Science core collection database until 2022 and visually analyzekeywords in this field through CiteSpace5.8.R3 software,Results:A total of 261 iteratures were included.The research focuses mainly on advanced care planning,diabetes care,andgroup prenatal care,The research trend tends to be telemedicine and nursing provided by specialized nurses.Conclusion:Scholars can learn from the research hotspots of foreign shared medical appointments,pay attention to the research trend,expand its application scope in combination with China's national conditions,and further promote thedevelopment of shared medical appointments in China. 展开更多
关键词 shared medical appointment group medical visit CITESPACE research focus research frontier visual analysis
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Making an Appointment
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《China Today》 1995年第7期62-64,共3页
MakinganAppointment基本句BasicSentences那可太好了!你看几点出发好?就这么定了。(Situation:Mr.Wang,acompanymanager,inviteshisfriendJ... MakinganAppointment基本句BasicSentences那可太好了!你看几点出发好?就这么定了。(Situation:Mr.Wang,acompanymanager,inviteshisfriendJohntovisittheGrea... 展开更多
关键词 Making an appointment
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How to Make an Appointment?
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作者 王涛 《中学英语园地(初一版)》 2006年第12期59-60,共2页
关键词 How to Make an appointment
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Keeping an Appointment With Death The Final Contribution of a Woman Doct
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作者 LI HAOMING 《China Today》 1995年第6期43-44,共2页
KeepinganAppointmentWithDeathTheFinalContributionofaWomanDoctorByLIHAOMINGATMID-AUTUMNnightin1994Dr.ZhaoXunm... KeepinganAppointmentWithDeathTheFinalContributionofaWomanDoctorByLIHAOMINGATMID-AUTUMNnightin1994Dr.ZhaoXunmei,chiefphysician... 展开更多
关键词 Keeping an appointment With Death The Final Contribution of a Woman Doct
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The Implementation Dilemmas and Solutions of the Appointed Guardianship System from the Perspective of the Protection of the Rights and Interests of the Elderly
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作者 LI Dejian ZHENG Ran JIANG Yu(Translated) 《The Journal of Human Rights》 2025年第4期896-917,共22页
In a deeply aging society,the appointed guardianship system,as an important arrangement for the protection of the rights and interests of the elderly,still faces many practical difficulties.Typical examples include:du... In a deeply aging society,the appointed guardianship system,as an important arrangement for the protection of the rights and interests of the elderly,still faces many practical difficulties.Typical examples include:during the decision-making stage of whether to choose appointed guardianship,the lack of professionalism and availability of appointed guardians can easily hinder the elderly from choosing to apply it;during the establishment stage of appointed guardianship,the limited rules related to the appointed guardianship agreement can easily lead to the frustration of the elderly’s subjective will;during the operation stage of appointed guardianship,the insufficient accountability mechanisms for appointed guardians can easily lead to the infringement of the personal or property rights of the elderly.By reflecting on its jurisprudential causes,it can be found that the current law largely ignores the orientation of appointed guardianship as a welfare for the elderly in social law,the concept of substantive equality in the appointed guardianship agreement,and the theoretical attributes of the appointed guardianship as a fiduciary relationship.Therefore,the appointed guardianship system in China should be systematically improved to fully release its institutional potential in the protection of the rights and interests of the elderly based on these jurisprudential principles.In particular,it is possible to consider actively promoting the“trust+appointed guardianship”model and cultivating a team of appointed guardians by the state based on the concept of elderly welfare;strengthening the protection of notarization procedures and the reasonable design of the appointed guardianship agreement based on the concept of substantive equality;and refining the fiduciary standards of appointed guardians and strengthening guardianship supervision based on the nature of fiduciary relationship. 展开更多
关键词 protection of the rights and interests of the elderly appointed guardianship elderly welfare substantive equality fiduciary relationship
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四旋翼无人机指定时间预设性能姿态跟踪控制
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作者 王雪娇 陈明 盖玉林 《电光与控制》 北大核心 2026年第1期37-43,共7页
针对四旋翼无人机在复杂环境下的姿态跟踪控制问题,提出了一种结合指定时间预设性能函数和指令滤波技术的高精度控制策略。首先,通过引入指定时间预设性能函数和调节函数,实现了对系统瞬态和稳态性能的无关初始条件的精确控制,确保了系... 针对四旋翼无人机在复杂环境下的姿态跟踪控制问题,提出了一种结合指定时间预设性能函数和指令滤波技术的高精度控制策略。首先,通过引入指定时间预设性能函数和调节函数,实现了对系统瞬态和稳态性能的无关初始条件的精确控制,确保了系统在指定时间内达到期望的性能指标;其次,利用指令滤波技术有效降低了高频噪声对系统的影响,避免了“微分爆炸”问题,显著增强了系统的抗干扰能力和稳定性;最后,数值仿真验证了所提策略的有效性。 展开更多
关键词 四旋翼无人机 姿态跟踪控制 指定时间预设性能函数 指令滤波
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注意力延续:地方政府“一任接着一任干”的发生机制——对湖南省长沙市食品安全治理的过程追踪
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作者 谢伊云 《求实》 北大核心 2026年第1期29-42,M0004,共15页
“政府注意力”是突破任期制下行政间断的切入点。对湖南省长沙市食品安全治理的过程追踪发现,地方政府的治理实践受制于双向要求。从中央层面看,中央的治理理念传递、行动舞台设置构成了其注意力分配的普遍条件;从地方层面看,地方社会... “政府注意力”是突破任期制下行政间断的切入点。对湖南省长沙市食品安全治理的过程追踪发现,地方政府的治理实践受制于双向要求。从中央层面看,中央的治理理念传递、行动舞台设置构成了其注意力分配的普遍条件;从地方层面看,地方社会的发展需求与职能部门的工作诉求塑造了其注意力分配的具体条件。两者共同作用,双向引导与巩固地方政府注意力聚焦于“社会治理—经济发展—政绩建设”三重领域交集内,实现了“一任接着一任干”的普遍图景。研究进一步讨论了支撑政府注意力延续发生机制持续有效的制度环境:一是地方政府在科层互动过程中主动建构政策议题,二是地方主政官员积极引导构建开放协商的议题创设过程。 展开更多
关键词 地方政府 主政官员 政府注意力 注意力延续 任期制 “一任接着一任干”
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Prof. James M.Tiedje Appointed as an Honorary Editor-in-Chief
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《Pedosphere》 SCIE CAS CSCD 2019年第1期81-81,共1页
Prof.James M.Tiedje,University Distinguished Professor and Director of the Center for Microbial Ecology at Michigan State University,Academician of the American Academy of Sciences,has been appointed as an Honorary Ed... Prof.James M.Tiedje,University Distinguished Professor and Director of the Center for Microbial Ecology at Michigan State University,Academician of the American Academy of Sciences,has been appointed as an Honorary Editor-in-Chief of Pedosphere.Prof. 展开更多
关键词 JAMES M.Tiedje appointed as an Honorary Editor-in-Chief
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