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Systematic bibliometric analysis of research hotspots and trends on the application of premium IOLs in the past 2 decades
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作者 Liang-Pin Li Li-Yun Yuan +2 位作者 De-Shen Mao Xia Hua Xiao-Yong Yuan 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2024年第4期736-747,共12页
AIM:To analysis of research hotspots and trends on the application of premium intraocular lens(PIOLs)in the past 2 decades.METHODS:The literature search was performed on the Web of Science and included PIOLs studies p... AIM:To analysis of research hotspots and trends on the application of premium intraocular lens(PIOLs)in the past 2 decades.METHODS:The literature search was performed on the Web of Science and included PIOLs studies published between January 2000 and December 2022.The retrieved literature was collated and analyzed by R-tool’s Bibliometrix package,CitNetExplorer,CiteSpace and other software.RESULTS:A total of 1801 articles about PIOLs were obtained,most of which were published in Spain and the United States.The organization that published the most articles was the University of Valencia in Spain.Alió JL,and Montés-Micó R,from Spain were the most influential authors in this field.The Journal of Cataract and Refractive Surgery and Journal of Refractive Surgery were the core journals for this field;the top 10 cited articles mainly focus on postoperative satisfaction with multifocal intraocular lens(IOLs)and postoperative results of toric IOLs.Through the keyword analysis,we found that trifocal IOLs,astigmatism and extended depth of focus(EDoF)IOLs are the most discussed topics at present,and the importance of astigmatism and the clinical application of the new generation of PIOLs are the emerging research trends.CONCLUSION:Bibliometric analysis can effectively help to identify multilevel concerns in PIOLs research and the prevailing research trends in the realm of PIOLs encompass the adoption of EDoF IOLs,trifocal IOLs,and their respective Toric models. 展开更多
关键词 premium intraocular lens BIBLIOmETRIC H-INDEX cataract surgery global trends
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Role of End-ring Configuration in Shaping IE4 Induction Motor Performance 被引量:1
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作者 Tayfun Gundogdu Sinan Suli 《CES Transactions on Electrical Machines and Systems》 EI CSCD 2024年第3期245-254,共10页
The performance characteristics,particularly the starting performance of direct line-fed induction motors,which are mainly influenced by the design of the rotor,are crucial considerations for end-users.It is quite a c... The performance characteristics,particularly the starting performance of direct line-fed induction motors,which are mainly influenced by the design of the rotor,are crucial considerations for end-users.It is quite a challenging issue for motor manufacturers to enhance the starting performance of existing mass-produced motors with minimal modifications and expenses.In this paper,a simple and cost-effective method to improve the starting performance of a commercial squirrel-cage induction motor(SCIM)is proposed.The influence of geometric parameters of the end-ring on the performance characteristics,including starting(locked rotor)torque,pull-up and break down torque,starting current,rotor electric parameters,current density,power losses,and efficiency have been comprehensively investigated.It has been revealed that among the other end-ring design parameters,the ring thickness has a significant effect on the performance characteristics.An optimal end-ring thickness is determined,and its performance characteristics have been compared to those of its initial counterpart.Numeric and parametric analyses have been conducted using a 2D time-stepping finite element method(FEM).The FEM results were validated using experimental measurements obtained from an 11 kW SCIM prototype. 展开更多
关键词 End-ring design Induction motor Starting performance Super premium efficiency Torque-speed curve
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Data Scale, Data Scope and Platform Enterprise Performance: Insights from Digital Platform M&As
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作者 Liu Yubin Zhang Guijuan Xu Honghai 《China Economist》 2024年第5期82-106,共25页
Data is a key asset for digital platforms,and mergers and acquisitions(M&As)are an important way for platform enterprises to acquire it.The types of data obtained from intra-industry and cross-sector M&As diff... Data is a key asset for digital platforms,and mergers and acquisitions(M&As)are an important way for platform enterprises to acquire it.The types of data obtained from intra-industry and cross-sector M&As differ,as does the extent to which they interact within or between platforms.The impact of such data on corporate market performance is an important question to consider when selecting strategies for digital platform M&As.Based on our research on advertising-driven platforms,we developed a two-stage Hotelling game model for comparing the market performance effects of intra-industry M&As and cross-sector M&As for digital platforms.We carried out an empirical test using relevant data from advertising-driven digital platforms between 2009 and 2021,as well as a case study on Baidu’s M&A activities.Our research discovered that intra-industry M&As driven by“data economies of scale”and cross-sector M&As driven by“data economies of scope”are both beneficial to the market performance of platform enterprises.Intra-industry M&As have a more significant positive effect on the market performance of platform enterprises because the same types of data are easier to integrate and develop the“network effect of data scale”.From a data factor perspective,this paper reveals the inherent economic logic by which different types of M&As influence the market performance of digital platforms,as well as policymaking recommendations for all digital platforms to select M&A strategies based on data scale,data scope,and the network effect of data. 展开更多
关键词 Digital platforms intra-industry m&a cross-sector m&a data economies of scale data economies of scope
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Pareto-Optimal Reinsurance Based on TVaR Premium Principle and Vajda Condition
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作者 Fengzhu Chang Ying Fang 《Open Journal of Applied Sciences》 2023年第10期1649-1680,共32页
Reinsurance is an effective risk management tool for insurers to stabilize their profitability. In a typical reinsurance treaty, an insurer cedes part of the loss to a reinsurer. As the insurer faces an increasing num... Reinsurance is an effective risk management tool for insurers to stabilize their profitability. In a typical reinsurance treaty, an insurer cedes part of the loss to a reinsurer. As the insurer faces an increasing number of total losses in the insurance market, the insurer might expect the reinsurer to bear an increasing proportion of the total loss, that is the insurer might expect the reinsurer to pay an increasing proportion of the total claim amount when he faces an increasing number of total claims in the insurance market. Motivated by this, we study the optimal reinsurance problem under the Vajda condition. To prevent moral hazard and reflect the spirit of reinsurance, we assume that the retained loss function is increasing and the ceded loss function satisfies the Vajda condition. We derive the explicit expression of the optimal reinsurance under the TVaR risk measure and TVaR premium principle from the perspective of both an insurer and a reinsurer. Our results show that the explicit expression of the optimal reinsurance is in the form of two or three interconnected line segments. Under an additional mild constraint, we get the optimal parameters and find the optimal reinsurance strategy is full reinsurance, no reinsurance, stop loss reinsurance, or quota-share reinsurance. Finally, we gave an example to analyze the impact of the weighting factor on optimal reinsurance. 展开更多
关键词 Pareto-Optimal Reinsurance TVaR Risk measure Vajda Condition TVaR premium Principle
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Cyberattack Ramifications, The Hidden Cost of a Security Breach
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作者 Meysam Tahmasebi 《Journal of Information Security》 2024年第2期87-105,共19页
In this in-depth exploration, I delve into the complex implications and costs of cybersecurity breaches. Venturing beyond just the immediate repercussions, the research unearths both the overt and concealed long-term ... In this in-depth exploration, I delve into the complex implications and costs of cybersecurity breaches. Venturing beyond just the immediate repercussions, the research unearths both the overt and concealed long-term consequences that businesses encounter. This study integrates findings from various research, including quantitative reports, drawing upon real-world incidents faced by both small and large enterprises. This investigation emphasizes the profound intangible costs, such as trade name devaluation and potential damage to brand reputation, which can persist long after the breach. By collating insights from industry experts and a myriad of research, the study provides a comprehensive perspective on the profound, multi-dimensional impacts of cybersecurity incidents. The overarching aim is to underscore the often-underestimated scope and depth of these breaches, emphasizing the entire timeline post-incident and the urgent need for fortified preventative and reactive measures in the digital domain. 展开更多
关键词 artificial Intelligence (aI) Business Continuity Case Studies Copyright Cost-Benefit analysis Credit Rating Cyberwarfare Cybersecurity Breaches Data Breaches Denial Of Service (DOS) Devaluation Of Trade Name Disaster Recovery Distributed Denial of Service (DDOS) Identity Theft Increased Cost to Raise Debt Insurance premium Intellectual Property Operational Disruption Patent Post-Breach Customer Protection Recovery Point Objective (RPO) Recovery Time Objective (RTO) Regulatory Compliance Risk assessment Service Level agreement Stuxnet Trade Secret
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Explainable AI and Interpretable Model for Insurance Premium Prediction
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作者 Umar Abdulkadir Isa Anil Fernando 《Journal on Artificial Intelligence》 2023年第1期31-42,共12页
Traditional machine learning metrics(TMLMs)are quite useful for the current research work precision,recall,accuracy,MSE and RMSE.Not enough for a practitioner to be confident about the performance and dependability of... Traditional machine learning metrics(TMLMs)are quite useful for the current research work precision,recall,accuracy,MSE and RMSE.Not enough for a practitioner to be confident about the performance and dependability of innovative interpretable model 85%–92%.We included in the prediction process,machine learning models(MLMs)with greater than 99%accuracy with a sensitivity of 95%–98%and specifically in the database.We need to explain the model to domain specialists through the MLMs.Human-understandable explanations in addition to ML professionals must establish trust in the prediction of our model.This is achieved by creating a model-independent,locally accurate explanation set that makes it better than the primary model.As we know that human interaction with machine learning systems on this model’s interpretability is more crucial.For supporting set validations in model selection insurance premium prediction.In this study,we proposed the use of the(LIME and SHAP)approach to understand research properly and explain a model developed using random forest regression to predict insurance premiums.The SHAP algorithm’s drawback,as seen in our experiments,is its lengthy computing time—to produce the findings,it must compute every possible combination.In addition,the experiments conducted were intended to focus on the model’s interpretability and explain its ability using LIME and SHAP,not the insurance premium charge prediction.Three experiments were conducted through experiment,one was to interpret the random forest regression model using LIME techniques.In experiment 2,we used the SHAP technique to interpret the model insurance premium prediction(IPP). 展开更多
关键词 LImE SHaP INNOVaTIVE explainable aI random forest machine learning insurance premium
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国际能源投资项目基准收益率研究——基于CAPM模型 被引量:1
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作者 杨海平 李慧 《山东工商学院学报》 2023年第5期99-105,共7页
以国内企业自身财务数据为基础,利用变异系数模型、相关系数模型将企业对应国内能源行业的风险系数转化为以美国为基准的风险系数;进一步引入无风险收益率、市场风险溢价率、国家风险溢价率,构建国际能源投资项目资本金内部收益率基准... 以国内企业自身财务数据为基础,利用变异系数模型、相关系数模型将企业对应国内能源行业的风险系数转化为以美国为基准的风险系数;进一步引入无风险收益率、市场风险溢价率、国家风险溢价率,构建国际能源投资项目资本金内部收益率基准测算模型,用于测算风电、光伏项目资本金财务内部收益率基准,为企业国际能源项目投资提供投资决策依据。 展开更多
关键词 CaPm模型 国家风险溢价 资本金财务内部收益率 国际投资
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无线上网三驾马车——华硕WL-500g Premium无线路由器WL-100gE PCMCIA无线网卡WL-138gE PCI无线网卡
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作者 小虫 《大众硬件》 2006年第11期54-55,共2页
在“无线上网”越来越流行的今天,无论办公上网无线化还是家庭上网无线化都已慢慢走进我们的生活。速度和稳定性自然是无线网络最基本的要求,华硕给评测室送来了其WL系列的无线网络套件,将为我们展示无线网络连接的全新天地。
关键词 PCmCIa无线网卡 无线上网 premium 无线路由器 华硕 PCI 无线网络套件
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Crop Insurance, Premium Subsidy and Agricultural Output 被引量:24
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作者 XU Jing-feng LIAO Pu 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2014年第11期2537-2545,共9页
This paper studied the effects of crop insurance on agricultural output with an economic growth model. Based on Ramsey-Cass-Koopmans (RCK) model, a basic model of agriculture economic growth was developed. Extending... This paper studied the effects of crop insurance on agricultural output with an economic growth model. Based on Ramsey-Cass-Koopmans (RCK) model, a basic model of agriculture economic growth was developed. Extending the basic model to incorporate uncertainty and insurance mechanism, a risk model and a risk-insurance model were built to study the inlfuences of risk and crop insurance on agricultural output. Compared with the steady states of the three models, the following results are achieved:(i) agricultural output decreases if we introduce uncertainty into the risk-free model;(ii) crop insurance promotes agriculture economic growth if insurance mechanism is introduced into the risk model;(iii) premium subsidy constantly improves agricultural output. Our contribution is that we studied the effects of crop insurance and premium subsidy from the perspective of economic growth in a dynamic framework, and proved the output promotion of crop insurance theoretically. 展开更多
关键词 economic growth agriculture risk crop insurance premium subsidy
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Is the “One Province One Rate” premium policy reasonable for Chinese crop insurance? The case in Jilin Province 被引量:4
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作者 ZHOU Xian-hua LIAO Pu WANG Ke 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第8期1900-1911,共12页
Crop insurance in China is currently adopting the premium pricing strategy of "One Province One Rate", which appears to be in line with the systematic risk characteristics within crop insurance. This researc... Crop insurance in China is currently adopting the premium pricing strategy of "One Province One Rate", which appears to be in line with the systematic risk characteristics within crop insurance. This research aims to investigate the theoretical rationalization of this pricing strategy and its implications using the spatial lag model and the county-level data from the 45 corn plant counties of Jilin Province, China. Results corroborate that:(1) the spatial spillover effect of the corn yield risk is significant in Jilin but decreases rapidly when the risk unit includes more than eight counties; and(2) separating Jilin Province into eight risk zones for corn insurance will significantly reduce the high cross-subsidy phenomenon arising from the "One Province One Rate" strategy and shall benefit poor peasants in the region as well. This paper not only proves the existence of a systematic risk of crop insurance but also reveals that the spatial correlation and systemic features of the crop yield risk do not create a solid foundation for the current pricing strategy of "One Province One Rate". These conclusions will undoubtedly provide important references and empirical evidence for the role of China’s crop insurance in poverty alleviation. 展开更多
关键词 crop insurance premium spatial correlation spatial lag model
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Ruin Probability with Variable Premium Rate and Disturbed by Diffusion in a Markovian Environment 被引量:2
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作者 LIUYan HUYi-jun 《Wuhan University Journal of Natural Sciences》 EI CAS 2004年第4期399-403,共5页
We consider a risk model with a premium rate which varies with the level of free reserves. In this model, the occurrence of claims is described by a Cox process with Markov intensity process, and the influence of stoc... We consider a risk model with a premium rate which varies with the level of free reserves. In this model, the occurrence of claims is described by a Cox process with Markov intensity process, and the influence of stochastic factors is considered by adding a diffusion process. The integro-differential equation for the ruin probability is derived by a infinitesimal method. Key words ruin probability - variable premium rate - diffusion process - Markov intensity CLC number O 211.9 Foundation item: Supported by the National Natural Science Foundation of China (10071058, 70273029) 展开更多
关键词 ruin probability variable premium rate diffusion process markov intensity
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Study on Reasonable Premium Rate of Pension Insurance in China 被引量:1
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作者 孙涛 陈晓慧 《International Journal of Mining Science and Technology》 SCIE EI 2000年第2期99-102,共4页
By analyzing the cause of too high premium rate of pension insurance at present and discussing the current practice of Chinese Pension Insurance System, three models to determine the reasonable paying level of premium... By analyzing the cause of too high premium rate of pension insurance at present and discussing the current practice of Chinese Pension Insurance System, three models to determine the reasonable paying level of premium, returning level of retirement pay and premium rate are established. Comparatively speaking, these models solve the problem of the determination of the premium rate more scientifically and offer an effective analyzing means to the improvement of the Chinese Pension Insurance System. 展开更多
关键词 PENSION INSURaNCE mODEL premium r
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OPTIMAL DIVIDEND-PENALTY STRATEGIES FOR INSURANCE RISK MODELS WITH SURPLUS-DEPENDENT PREMIUMS 被引量:3
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作者 Jingwei LI Guoxin LIU Jinyan ZHAO 《Acta Mathematica Scientia》 SCIE CSCD 2020年第1期170-198,共29页
This paper concerns an optimal dividend-penalty problem for the risk models with surplus-dependent premiums.The objective is to maximize the difference of the expected cumulative discounted dividend payments received ... This paper concerns an optimal dividend-penalty problem for the risk models with surplus-dependent premiums.The objective is to maximize the difference of the expected cumulative discounted dividend payments received until the moment of ruin and a discounted penalty payment taken at the moment of ruin.Since the value function may be not smooth enough to be the classical solution of the HJB equation,the viscosity solution is involved.The optimal value function can be characterized as the smallest viscosity supersolution of the HJB equation and the optimal dividend-penalty strategy has a band structure.Finally,some numerical examples with gamma distribution for the claims are analyzed. 展开更多
关键词 band strategy risk models with surplus-dependent premiumS HJB equation VISCOSITY solution Gerber-shiu function
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Sealing Reliability and Sensitivity Analysis for a Premium Threaded Connection Based on Kriging Model 被引量:2
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作者 郭伟 崔卫民 +2 位作者 何勃 刘敬一 宋笔锋 《Journal of Donghua University(English Edition)》 EI CAS 2016年第5期791-796,共6页
In order to analyze the sealing performance of a new designed premium threaded connection,this paper studies the sealing reliability and sensitivity of the premium threaded connection at its most dangerous load condit... In order to analyze the sealing performance of a new designed premium threaded connection,this paper studies the sealing reliability and sensitivity of the premium threaded connection at its most dangerous load condition based on Kriging model.The load condition of premium threaded connection in deep well is so complex that the most dangerous load point of premium threaded connection under the typical series loads is studied by finite element analysis(FEA) method firstly.Since the FEA of the premium threaded connection is too time-consuming,Kriging model which is accurate and efficient for multidimensional and highly nonlinear problems is built to calculate the sealing reliability of the premium threaded connection at the most dangerous load point.Finally,the sealing sensitivity analysis of the premium threaded connection is performed by the method of variance-based global sensitivity analysis.The work in this paper could contribute for the analysis and further improvement of the premium threaded connection. 展开更多
关键词 premium dangerous sealing consuming variance Connection premium oilfield torque thread
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China's Premium Chauffeured Car Market Has Potential 被引量:1
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作者 Jenny Hu 《China's Foreign Trade》 2016年第2期46-47,共2页
After the initial surge in market growth,platforms began reducing subsidies to passengers and drivers in response to the inevitable pressure from cash-flow concerns.According to Roland Berger’s recently released"... After the initial surge in market growth,platforms began reducing subsidies to passengers and drivers in response to the inevitable pressure from cash-flow concerns.According to Roland Berger’s recently released"Analysis of China’s premium chauffeured car market",it shows that premium 展开更多
关键词 premium premium inevitable Berger SURGE currently COmPaNIES RELEaSED HELPING PRIVaTE
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Price distortions and municipal bonds premiums:evidence from Switzerland 被引量:1
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作者 Darko B.Vukovic Carlos J.Rincon Moinak Maiti 《Financial Innovation》 2021年第1期1359-1379,共21页
This study examines the pricing of municipal bonds before and after a currency shock in Switzerland.Two approaches are used to decompose the municipal to treasuries bond spreads into liquidity,maturity,and default ris... This study examines the pricing of municipal bonds before and after a currency shock in Switzerland.Two approaches are used to decompose the municipal to treasuries bond spreads into liquidity,maturity,and default risk premiums.The first approach is the model of the cross-sectional instrumental variables,and the second approach is the model of the instrumental variables with panel data.This study examines the composition of spreads for both approaches,in three scenarios:before,throughout,and after the currency shock.The study performed Durbin-Wu-Hausman tests for each decisive model to verify endogeneity issues,including the Lagrangian Multiplier test,the Cragg-Donald Wald F statistic to confirm the relationship of instrumental and endogenous variables,and the structural break test(Bai-Perron test)to determine the existence of structural breaks in bond distortions.This study finds that the currency price distortions of the Swiss franc in January 2015 made long-run changes in the composition of the municipal bond spreads.This research contributes to the understanding of municipal bond pricing by showing that default risk accounts for a large portion of the municipal bond spread,while maturity risk plays a lesser role.According to our empirical findings,unexpected large currency price shocks may have long-term implications on the municipal bond spreads. 展开更多
关键词 municipal bonds Risk premiums Bond spreads Price distortions
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用Solidworks simulation premium仿真分析热泵管路应力简化试验操作 被引量:2
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作者 雷朋飞 刘远辉 高翔 《制冷与空调》 2021年第9期91-96,共6页
商用空气源热泵系统,管路粗且走向复杂,弯位多,测试应力、振幅时,常常由于测试应力的设备通道数量不够,导致少测和漏测,市场就可能出现管路振断、振裂的情况,或者试验时间很长,反复测试很多点,占用大量试验资源。本文应用有限元分析,先... 商用空气源热泵系统,管路粗且走向复杂,弯位多,测试应力、振幅时,常常由于测试应力的设备通道数量不够,导致少测和漏测,市场就可能出现管路振断、振裂的情况,或者试验时间很长,反复测试很多点,占用大量试验资源。本文应用有限元分析,先对管路进行仿真分析,找出振动、应力相对大的位置,通过试验验证,确认有限元分析来准确定位应力大的位置的可行性,这样,测试前均对配管进行仿真,提升检测命中率,为公司节省了大量试验资源。 展开更多
关键词 热泵 配管应力 仿真 谐响应分析 Solidworks simulation premium
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The Fatherhood Premium: Mirage or Reality? How Do Occupational Characteristics Matter 被引量:1
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作者 Ruoqing Rachelle Wang-Cendejas Ling Bai 《Sociology Study》 2018年第4期157-170,共14页
A differential fatherhood premium exists among selected groups of fathers of various socio-economic backgrounds. Besides marital status, residential arrangement, biological paternity, and other demographic dimensions,... A differential fatherhood premium exists among selected groups of fathers of various socio-economic backgrounds. Besides marital status, residential arrangement, biological paternity, and other demographic dimensions, the mechanisms associated with fathers' structural characteristics of work that produce divergent labor market outcomes are less well understood. The authors leveraged the cases of productivity and specialization, family and responsibility, and compensating differentials and examined the impacts of work context and occupational characteristics on the pay gap between fathers and non-fathers Based on joint data from the 1997-2015 National Longitudinal Survey of Youth (NLSY97) and Occupational Information Network (O'NET) (n -- 37,138), the authors used fixed-effects models to estimate the associations between job features and the fatherhood premium. The regression results showed that occupations entailing competition and requiring on-the-job training are associated with more wage bonus; occupations offering inflexible schedule are associated with less wage gain These work-related characteristics further emphasize fathers' work structure and context, human capital accumulation, and work-family conflict. Overall, these findings are consistent with the theoretical perspectives of productivity and specialization and compensating differentials, adding new evidences to the structural explanations of the fatherhood premium. 展开更多
关键词 Fatherhood premium occupational characteristics work-family conflict
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STRENGTH DESIGN OF PREMIUM THREADED CASING CONNECTION
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作者 GaoLianxin JinYe ZhangYi 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2004年第1期110-113,共4页
Using premium casing connections instead of API ones is one of the mosteffective technique to prevent casing failure. The factors contribute to the strength of premiumcasing connections are studied with FEA and full-s... Using premium casing connections instead of API ones is one of the mosteffective technique to prevent casing failure. The factors contribute to the strength of premiumcasing connections are studied with FEA and full-scale test. The criterions are presented thatensure the connection's strength higher than the pipe. At the same time, the method is given todecrease the peak stress of the connection so as to improve its anticorruption property. At last,full-scale tests are done to test the strength of the connections designed with the methoddescribed, the results show that the connection's strength is higher than the pipe. This indicatedthat the method described is effective in designing premium casing connection. 展开更多
关键词 Casing connection premium thread Connecting strength Finite elementmethod Full-scale test
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An Empirical Study of Asian Crude Oil Premiums
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作者 Li Chun Wang Zhen Zhang Zheng 《Petroleum Science》 SCIE CAS CSCD 2006年第4期36-42,共7页
The price of Middle East crude oil exported to Asian countries has been higher than that to Europe and America for a long period, and this price differential made Asian countries pay more than European and American co... The price of Middle East crude oil exported to Asian countries has been higher than that to Europe and America for a long period, and this price differential made Asian countries pay more than European and American countries. Prior investigations found that "Asian Crude Oil Premium" did exist at a relatively low oil price level. However, world oil price soared after 2003, making the price of Middle East crude oil exported to European countries or America rise quickly, sometimes even higher than that to Asia. Under this situation, this paper uses the price of Middle East crude oil sold to Europe or America or Asia to test if the premium exists at a high oil price level and concludes that the crude oil price premium of Asia against America does not exist, but the premium of Asia against Europe still exists. 展开更多
关键词 Price differential price mechanism asian crude oil premium
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