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Insurance Plan for Service Assurance in Cloud Computing Market with Incomplete Information

Journal of Communications and Information Networks 2022年第1期7卷 11-22页

作者： Yanru Zhang Chunxiao Jiang Nguyen H.Tran Shengrong Bu FeiRichard Yu zhu han College of Computer Science and Engineering the University of Electronic Science and Technology of ChinaChengdu 611731China Shenzhen Institute for Advanced Study UESTCLonghuaShenzhen 518110China Tsinghua Space Center Tsinghua UniversityBeijing 10084China School of Computer Science the University of SydneySydneyNew South WalesAustralia Department of Engineering Brock UniversityONCanada School of Information Technology Depart.of Systems and Computer EngineeringCarleton UniversityOttawa K1S 5B6ONCanada Department of Electrical and Computer Engineering the University of HoustonHouston 77004TXUSA

Nowadays,cloud computing has been identified as new opportunities for migrating to the expected agility,reuse,and adaptive capabilities that can support the ever changing IT trends and ***,the rapid evolution of those technologies also comes with open issues such as security,privacy,integrity,quality of services,and their possible detrimental *** this work,the concept of insurance is introduced to compensate the cloud computing customers when encountering those failures if service providers(SPs)have insurance ***,we consider the situation when the insurer is unable to see the system failure risk levels of the SPs,which is usually seen as an incomplete information market,in contrast with the optimal situation in a complete information ***,an insurance-based cloud computing architecture is proposed to build a monetary credit system in which the cloud computing SP pays a premium for a certain coverage to the ***,problem is formulated to solve the optimal insurance plan in complete and incomplete information markets,together with detail analysis of insurance policies in both cases are ***,simulation results show the properties of the two insurance plans and parameters that affect the design of the insurance plan.

关键词： service assurance cloud computing market incomplete information game theory insurance plan

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Catalytic hydrative cyclization of aldehyde-ynamides with water for synthesis of medium-sized lactams

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Science China Chemistry 2021年第11期64卷 1985-1989页

作者： Bo-han zhu Yan-Xin Zheng Wei Kang Chao Deng Jin-Mei Zhou Long-Wu Ye Key Laboratory of Chemical Biology of Fujian Province State Key Laboratory of Physical Chemistry of Solid SurfacesCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of SciencesNanjing Agricultural UniversityNanjing210095China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai200032China

A non-noble metal catalyzed hydrative cyclization of aldehyde-ynamides for efficient and practical synthesis of medium-sized lactams(7-to 9-membered rings)is *** with previous hydrative cyclization for the formation of six-membered lactams(cis-form),a totally inverse diastereoselectivity(trans-form)of medium-sized lactams is *** addition,this protocol delivers valuable medium-sized lactams in moderate to good yields with high ***,a rational mechanism to understand this inversion of diastereoselectivity is proposed based on theoretical calculations.

关键词： ynamides cyclization lactams diastereoselectivity N-heterocycles

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Formation Characteristics of CO_(2) Hydrates in the Presence of Porous Media and NaCl

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China Petroleum Processing & Petrochemical Technology 2024年第2期26卷 168-177页

作者： han Jianchao zhu Shuai Gui Xia College of Chemical Engineering Nanjing Tech UniversityNanjing 211816China

Hydrate-based CO_(2) sequestration is an effective method for reducing the greenhouse effect,and the presence of porous media and NaCl can impact the formation characteristics of *** study uses the constant volume temperature search method to investigate the effects of quartz sand particle size(0.006‒0.03 mm),water saturation(30%–90%),and NaCl concentration(1%‒9%)on the phase equilibrium and kinetics of CO_(2) hydrates within a temperature range of 273‒285 K and pressure range of 1.0‒3.5 *** results indicate that a decrease in quartz sand particle size or an increase in NaCl concentration shifts the hydrate phase equilibrium curve towards lower temperatures and higher pressures,making hydrate generation conditions more *** different particle size systems,there are no significant changes in the rate of CO_(2) hydrate formation or conversion *** highest hydrate conversion rate of 71.1%is observed in a 0.015 mm particle size *** increasing water saturation,both the generation rate and conversion rate of CO_(2) hydrates show a trend of first increasing and then ***,low concentrations of NaCl(1%–3%)are found to enhance the formation and conversion rates of CO_(2) ***,as NaCl concentration increases,the rate of CO_(2) hydrate formation and conversion rate decrease.

关键词： CO_(2)hydrate porous medium NaCl formation characteristics

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Multi-Objective Optimization of Traffic Signal Timing at Typical Junctions Based on Genetic Algorithms

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Computer Systems Science & Engineering 2023年第11期47卷 1901-1917页

作者： Zeyu Zhang han zhu Wei Zhang Zhiming Cai Linkai zhu Zefeng Li Faculty of Applied Sciences Macao Polytechnic UniversityMacao999078China Faculty of Data Science City University of MacaoMacao999078China

With the rapid development of urban road traffic and the increasing number of vehicles,how to alleviate traffic congestion is one of the hot issues that need to be urgently addressed in building smart ***,in this paper,a nonlinear multi-objective optimization model of urban intersection signal timing based on a Genetic Algorithm was ***,a typical urban intersection was selected as the research object,and drivers’acceleration habits were taken into ***’s more,the shortest average delay time,the least average number of stops,and the maximum capacity of the intersection were regarded as the optimization *** optimization results show that compared with the Webster method when the vehicle speed is 60 km/h and the acceleration is 2.5 m/s^(2),the signal intersection timing scheme based on the proposed Genetic Algorithm multi-objective optimization reduces the intersection signal cycle time by 14.6%,the average vehicle delay time by 12.9%,the capacity by 16.2%,and the average number of vehicles stop by 0.4%.To verify the simulation results,the authors imported the optimized timing scheme into the constructed Simulation of the Urban Mobility *** experimental results show that the authors optimized timing scheme is superior to Webster’s in terms of vehicle average loss time reduction,carbon monoxide emission,particulate matter emission,and vehicle fuel *** research in this paper provides a basis for Genetic algorithms in traffic signal control.

关键词： Multi-objective GA optimization traffic light timings average delay time the average number of stops traffic capacity SUMO simulation

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Effects of tsaoko (Fructus tsaoko) cultivating on tree diversity and canopy structure in the habitats of eastern hoolock gibbon (Hoolock leuconedys)

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Zoological Research 2014年第3期35卷 231-239页

作者： Sheng-Dong YUAN han-Lan FEI Shao-han zhu Liang-Wei CUI Huai-Sen AI Peng-Fei FAN Key Laboratory of Forest Disaster Warning and Control in Yunnan Province Southwest Forestry University Institute of Eastern-Himalaya Biodiversity Research Dali University Gaoligongshan National Natural Reserve

In this study, the quadrat method was used to study the effects of tsaoko （Fructus tsaoko） plantation on tree diversity and canopy structure of two natural habitats of eastern hoolock gibbon （Hoolock leuconedys）： Nankang （characterized by extensive tsaoko plantation） and Banchang （relatively well reserved and without tsaoko plantation）. Totally, 102 tree species from 25 families and 16 woody liana species from 10 families were recorded in Nankang, whereas 108 tree species from 30 families and 17 woody liana species from 12 families were recorded in Banchang. Although the tree species between two habitats is different, both habitats are characterized by enriched food resources for eastern hoolock gibbons, sharing similar dominant plant families. Due to tsaoko plantation, tree density proportion and diversity of forest layer I （〉20 m） in Nankang were both significantly decreased, but the tree density of layerH （10-20 m） increased. Likewise, in conjunction with these behavioral observations, we also address potential impacts of tsaoko plantation on the behavior of eastern hoolock gibbon.

关键词： Eastern hoolock gibbon (Hoolock leuconedys) Habitat Tree diversity Canopy structure Fructus tsaoko plantation Mt.Gaoligong

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Reliability analysis of multimodal scene matching based on correlation peaks

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Chinese Journal of Aeronautics 2024年第9期37卷 433-447页

作者： Zhirui YU Bai zhu Zhiqiang han Yuanxin YE Faculty of Geosciences and Engineering Southwest Jiaotong UniversityChengdu 611756China

The navigation system plays a pivotal role in guiding aircraft along designated routes,ensuring precise and punctual arrival at *** integration of scene matching with an inertial navigation system enhances the capability of providing a dependable guarantee for success-ful accomplishment of flight ***,assuring reliability in scene matching encoun-ters significant challenges in areas characterized by repetitive or weak *** tackle these challenges,we propose a novel method to assess the reliability of scene matching based on the dis-tinctive characteristics of correlation *** proposed method leverages the fact that the sim-ilarity of the optimal matching result is significantly higher than that of the surrounding area,and three novel indicators(e.g.,relative height,slope of a correlation peak,and ratio of a sub peak to the main peak)are determined to conjointly evaluate the reliability of scene *** pro-posed method entails matching a real-time image with a reference image to generate a correlation surface.A correlation peak is then obtained by extracting the portion of the correlation surface exhibiting a significant ***,the matching reliability is determined by considering the relative height,slope,and ratio of the peak *** experimental results with two sets of data demonstrate that the proposed method significantly outperforms traditional approaches in terms of precision,recall,and *** experiments also establish the efficacy of the proposed method in achieving reliable matching in challenging environments characterized by repetitive and weak *** enhancement holds the potential to significantly elevate scene-matching-based navigation.

关键词： Unmanned aerial vehicle Scene matching navigation Multimodal scene matching Correlation peak Reliabilityanalysis

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Fiber optic monitoring of an anti-slide pile in a retrogressive landslide

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第1期16卷 333-343页

作者： Lei Zhang Honghu zhu Heming han Bin Shi School of Water Resources and Environment China University of GeosciencesBeijing100084China State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing100084China School of Earth Sciences and Engineering Nanjing UniversityNanjing210023China School of Civil and Environmental Engineering Nanyang Technological University639798Singapore

Anti-slide piles are one of the most important reinforcement structures against landslides,and evalu-ating the working conditions is of great significance for landslide *** widely adopted analytical methods of pile internal forces include cantilever beam method and elastic foundation beam ***,due to many assumptions involved in calculation,the analytical models cannot be fully applicable to complex site situations,*** with multi-sliding surfaces and pile-soil interface separation as discussed *** view of this,the combination of distributed fiber optic sensing(DFOS)and strain-internal force conversion methods was proposed to evaluate the working conditions of an anti-sliding pile in a typical retrogressive landslide in the Three Gorges reservoir area,*** optical time domain reflectometry(BOTDR)was utilized to monitor the strain distri-bution along the ***,by analyzing the relative deformation between the pile and its adjacent inclinometer,the pile-soil interface separation was ***,the internal forces of the anti-slide pile were derived based on the strain-internal force conversion *** to the ratio of calculated internal forces to the design values,the working conditions of the anti-slide pile could be *** results demonstrated that the proposed method could reveal the deformation pattern of the anti-slide pile system,and can quantitatively evaluate its working conditions.

关键词： Anti-slide pile Multi-sliding surface Pile-soil interface Brillouin optical time domain reflectometry (BOTDR) Geotechnical monitoring Reservoir landslide

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益气活血化浊法治疗Wilson病肝纤维化的疗效观察

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广州中医药大学学报 2024年第4期41卷 822-828页

作者：张路芹韩咏竹程楠董健健安徽中医药大学神经病学研究所安徽合肥230061 安徽中医药大学神经病学研究所附属医院安徽合肥230061

【目的】评估益气活血化浊法治疗Wilson病(也称肝豆状核变性,Wilson’s disease,WD)肝纤维化的临床效果。【方法】采用回顾性研究方法,根据治疗方法的不同,将52例气虚血瘀型WD肝纤维化患者分为对照组24例和治疗组28例。对照组采用西药... 详细信息

【目的】评估益气活血化浊法治疗Wilson病(也称肝豆状核变性,Wilson’s disease,WD)肝纤维化的临床效果。【方法】采用回顾性研究方法,根据治疗方法的不同,将52例气虚血瘀型WD肝纤维化患者分为对照组24例和治疗组28例。对照组采用西药常规驱铜治疗,治疗组在对照组的基础上联合益气活血化浊法中药汤剂治疗,共治疗4周。观察2组患者治疗前后中医证候积分、统一肝豆状核变性评分量表(UWDRS)肝脏症状评分、血清肝纤维化指标[Ⅲ型前胶原(PCⅢ)、透明质酸(HA)、Ⅳ型胶原(CⅣ)、层粘连蛋白(LN)]和CXC基序趋化因子配体10(CXCL10)水平以及基于声脉冲辐射力成像技术(ARFI)的肝脏超声点剪波弹性成像(pSWE)值的变化情况,并评价2组患者的临床疗效。【结果】(1)疗效方面:治疗4周后,治疗组的总有效率为85.71%(24/28),对照组为54.17%(13/24),组间比较(χ2检验),治疗组的疗效明显优于对照组(P0.05)。(4)肝纤维化指标方面:治疗后,治疗组的血清HA、LN、CⅣ、PCⅢ水平均较治疗前降低(P0.05)。(5)趋化因子方面:治疗后,治疗组的血清CXCL10水平较治疗前明显降低(P0.05);组间比较,治疗组对血清CXCL10水平的降低幅度明显优于对照组(P<0.05)。(6)影像学方面:治疗后,2组患者的肝脏超声pSWE值均较治疗前降低(P<0.01),且治疗组对肝脏超声pSWE值的降低幅度明显优于对照组(P<0.01)。【结论】益气活血化浊法可以有效降低WD患者的中医证候积分,改善UWDRS肝脏症状评分,下调肝纤维化指标和血清CXCL10表达水平,降低肝脏pSWE值,提高临床疗效。

关键词： Wilson病肝豆状核变性肝纤维化益气活血化浊法声脉冲辐射力成像(ARFI)技术 CXC基序趋化因子配体10(CXCL10)

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Analyses on an electronic voltage transformer's failure by its resonance with very fast transient overvoltage and suppression

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High Voltage 2024年第1期9卷 150-162页

作者： Ruoyu han Houda zhu Qing Chen Hongbin Li Yue Tong Linshan han Yang Jiao School of Electrical and Electronic Engineering Huazhong University of Science and TechnologyWuhanChina China Electric Power Research Institute WuhanChina School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhanChina

As voltage measuring devices are widely used in the high voltage power system with a primary-secondary-fusion structure,electronic voltage transformers are directly connected to the primary conductor and would face much more serious electromagnetic environments than general secondary *** a result,they would still experience failures even when general protection measures are adopted to suppress overvoltages'*** address this issue,an innovative method is proposed after analyses are conducted on the resonance between a transformer and an *** this method,an air-cored coil is installed in a transformer to artificially shift its natural frequency and to dodge the high-frequency dominant component of a transient overvoltage,avoiding the aforementioned resonance and suppressing the secondary *** addition,simulations and laboratory tests are conducted to prove this method's validity.

关键词： transient resonance mentioned

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贯叶金丝桃二氯甲烷部位的化学成分研究

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中成药 2024年第5期46卷 1552-1558页

作者：张亦云韩竹箴张倩王佳程明赛王振中杨颖博肖伟南京中医药大学康缘中药学院江苏南京210023 中药制药过程控制与智能制造技术全国重点实验室江苏连云港222001 上海中医药大学中药研究所上海201203 江苏康缘药业股份有限公司江苏连云港222001

目的研究贯叶金丝桃Hypericum perforatum L.二氯甲烷部位的化学成分。方法贯叶金丝桃二氯甲烷部位采用硅胶、ODS、Sephadex LH-20、半制备HPLC等进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。结果从中分离得到11个化合物... 详细信息

目的研究贯叶金丝桃Hypericum perforatum L.二氯甲烷部位的化学成分。方法贯叶金丝桃二氯甲烷部位采用硅胶、ODS、Sephadex LH-20、半制备HPLC等进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。结果从中分离得到11个化合物,分别鉴定为贯叶金丝桃降碳聚酮A(1)、α-芒柄花醇(2)、(3 R)-thunberginol(3)、2-geranyloxy-1-(2-methylpropanoyl)-phloroglucinol(4)、4,6-dihydroxy-2-O-(3″,7″-dimethyl-2″,6″-octadienyl)-1-(2′-methylbutanoyl)benzene(5)、norhyperpalum G(6)、garsubellin A(7)、garsubellin B(8)、(2″R/S)-kellerine C(9)、kobusone(10)、圣草酚(11)。结论化合物1为新化合物,化合物2~3为首次在藤黄科植物中分离得到,化合物4~10为首次从该植物中分离得到。

关键词：贯叶金丝桃二氯甲烷部位化学成分分离鉴定

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