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Journal of Management Analytics 2022年第2期9卷 287-311页

作者： sudip Adak G.s.Mahapatra Department of Mathematics National Institute of TechnologyPuducherryKaraikal 609609India

This paper develops an integrated fuzzy two-layer supply chain for manufacturersand retailers with defective and non-defective types of products. The manufacturerproduces up to a specific time, including both faulty and non-defective items, andpost-screening only the non-defective item sends to the retailer. The strategy of theretailer is to do the screening of items received from the ***, the perfect quality items use to fulfill the demand of thecustomer, and the defective items are reworked. The retailer considers thatcustomer demand is time and reliability dependent. The proposed supply chainconsiders probabilistic deterioration for the manufacturer and retailers. Theoptimum solution of the given model is evaluated for both the cases of crispand fuzzy environments on the strategies such as production rate, unitproduction cost, idle time, screening, rework, etc. Managerial insights and theeffect of parameters on the optimal inventory under fuzziness are presented.

关键词： two-layer supply chain defective items deterioration screening reliability triangular fuzzy number

Obsolescence optimization of electronic and mechatronic components by considering dependability and energy consumption

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Journal of Central south University 2013年第5期20卷 1221-1225页

作者： M.A.Mellal s.Adjerid D.Benazzouz s.Berrazouane E.J.Williams solid Mechanics and system Laboratory Faculty of Engineering Sciences (FSI)M'Hamed Bougara University Faculty of Engineering sciences (FsI) M'Hamed Bougara University Decision sciences College of BusinessUniversity of Michigan Industrial and Manufacturing systems Engineering Department College of Engineering and Computer ScienceUniversity of Michigan

Nowadays, rapid technological progress influences the dependability of equipments and also causes rapid obsolescence. The mechatronic and electronic equipment components are mostly affected by obsolescence. A new challenger unit possesses identical functionalities, but with higher performances. This work aims to find the optimal number of components which should be replaced by new-type units, under budgetary constraints. In this work, the new challenger unit is characterized by lower energy consumption and the optimization steps are based on genetic algorithm (GA). The result shows the importance of this type of replacement in order to economize energy consumption and to deal with obsolescence.

关键词： obsolescence lower energy consumption mechatronic and electronic components genetic algorithm

sTRENGTHENING CAsT IRON MATRIX BY ALLOYINGELEMENTs WITH POsITIVE AND NEGATIVEsEGREGATION

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Acta Metallurgica sinica(English Letters) 1997年第4期10卷 329-332页

作者： Fan, Z.K. Wang, Y.Q. Liang, s.H. Huang, H.s. Xi'an Univ of Technology Xi'an China

The combinational use of alloying elements with positive and negative segregation has been shown to be very effective in strengthening the matrix of cast iron. Negative segregation alloying elements, Cu and si, make the inner parts of dendritic austenites and eutectic cells get good hardenability. On the contrary, positive segregation alloying elements Cr and Mn make the outer parts of dendrites have higher microhardness. Appropriate combination of the above two types of alloying elements can produce a uniform microhardness and high strength in gray cast irons.

关键词： Cast iron Chromium Copper Hardness Manganese segregation (metallography) silicon strengthening (metal)

Relaxation Time and Conductivity at a Rural station: Raichur

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Advances in Atmospheric sciences 1991年第3期8卷 379-381页

作者： G. K. Manohar s. s. Kandalgaonkar s. M. sholapurkar Indian Institute of Tropical Meteorology Pune-411008 India Indian Institute of Tropical Meteorology Pune-411008 IndiaIndian Institute of Tropical Meteorology Pune-411008 India

An examination of decay and growth rates of electric field near the ground during total solar eclipse of 16 February 1980 was made to study the electrical relaxation time and conductivity at Raichur. The values obtained i. e., 1320 seconds and 67.1163× 10-16 mhos m-1 of the two parameters were in fair agreement with the reported ones at the rural locations.

关键词： Raichur Relaxation Time and Conductivity at a Rural station

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障碍物几何参数对离心泵汽蚀特性的影响

障碍物几何参数对离心泵汽蚀特性的影响

作者：王泽瑞（Zakir khan）兰州理工大学

学位级别：硕士

Hydraulic machinery inevitably encounters cavitation problems during *** hazards of the cavitation process are mainly reflected in three aspects: First,cavitation will lead to serious deterioration of hydraulic performance of hydraulic machinery;second,bubbles can cause damage to the surface of the material known as *** the same time,accompanied by cavitation damage,there are also problems such as vibration and noise;third,cavitation will affect the flow’s unsteady characteristics or dynamic response *** to the dynamic response characteristics can make the flow unstable,and the instability caused by cavitation includes rotational cavitation and cavitation *** instabilities can lead to large oscillations in global flow and pressure,resulting in unsteady rotor dynamics and consequently,structural failure of the hydraulic *** present,the research on unsteady flow instability in hydraulic machinery is in its *** research on flow instability caused by cavitation is a hot and difficult issue in the field of hydraulic *** is almost impossible to completely eliminate the harm caused by cavitation flow instability in the engineering ***,the research direction of cavitation hazards has been adjusted to reduce and suppress the negative effects of cavitation instability,that is,the control of ***,there are measures such as adjusting the pipeline layout,installing asymmetric interference plates,installing circumferential grooves,and air supply for hydro-mechanical cavitation *** methods have a certain inhibitory effect on specific cavitation instability,but the cavitation instability is not completely inhibited,and the mechanism of inhibition is not fully ***,exploring and discovering cavitation instability control theory and technology with practical engineering value is significant for improving the anti-cavitation characteristics,and hydro machi

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Efficient solution of Ordinary Differential Equations with High-Dimensional Parametrized Uncertainty

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Communications in Computational Physics 2011年第7期10卷 253-278页

作者： Zhen Gao Jan s.Hesthaven Research Center for Applied Mathematics Ocean University of ChinaQingdao 266071ShandongChina Division of Applied Mathematics Brown University182 George StreetProvidenceRI 02912USA

The important task of evaluating the impact of random parameters on the output of stochastic ordinary differential equations(sODE)can be computationally very demanding,in particular for problems with a high-dimensional parameter *** this work we consider this problem in some detail and demonstrate that by combining several techniques one can dramatically reduce the overall cost without impacting the predictive accuracy of the output of *** discuss how the combination of ANOVA expansions,different sparse grid techniques,and the total sensitivity index(TsI)as a pre-selective mechanism enables the modeling of problems with hundred of *** demonstrate the accuracy and efficiency of this approach on a number of challenging test cases drawn from engineering and science.

关键词： sparse grids stochastic collocation method ANOVA expansion total sensitivity index

Implementation of FPGA Based MPPT Techniques for Grid-Connected PV system

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Intelligent Automation & soft Computing 2023年第2期35卷 1783-1798页

作者： Thamatapu Eswara Rao s.Elango Department of Electrical and Electronics Engineering Coimbatore Institute of TechnologyCoimbatoreIndia

Global energy demand is growing rapidly owing to industrial growth and *** energy sources are driven by limited reserves and rapid depletion of conventional energy sources(e.g.,fossil fuels).solar photovol-taic(PV),as a source of electricity,has grown in popularity over the last few dec-ades because of their clean,noise-free,low-maintenance,and abundant availability of solar *** are two types of maximum power point track-ing(MPPT)techniques:classical and evolutionary algorithm-based *** and less complex perturb and observe(P&O)and incremental conduc-tance(INC)approaches are extensively employed among classical *** study used aﬁeld-programmable gate array(FPGA)-based hardware arrange-ment for a grid-connected photovoltaic(PV)*** PV panels,MPPT con-trollers,and battery management systems are all components of the proposed *** the developed hardware prototype,various modes of operation of the grid-connected PV system were examined using P&O and incremental con-ductance MPPT approaches.

关键词： Grid connected PV system perturb and observe(P&O) incremental MPPT boost converter battery

Implementation of Hybrid Particle swarm Optimization for Optimized Regression Testing

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Intelligent Automation & soft Computing 2023年第6期36卷 2575-2590页

作者： V.Prakash s.Gopalakrishnan sAsTRA Deemed University KumbakonamTamilnadu613401India

software test case optimization improves the efficiency of the software by proper structure and reduces the fault in the *** existing research applies various optimization methods such as Genetic Algorithm,Crow search Algorithm,Ant Colony Optimization,etc.,for test case *** existing methods have limitations of lower efficiency in fault diagnosis,higher computa-tional time,and high memory *** existing methods have lower effi-ciency in software test case optimization when the number of test cases is *** research proposes the Tournament Winner Genetic Algorithm(TW-GA)method to improve the efficiency of software test case *** Information system(HIs)software was used to evaluate TW-GA model perfor-mance in test case *** tournament Winner in the proposed method selects the instances with the best fitness values and increases the exploitation of the search to find the optimal *** TW-GA method has higher exploita-tion that helps to find the mutant and equivalent mutation that significantly increases fault diagnosis in the *** TW-GA method discards the infor-mation with a lower fitness value that reduces the computational time and mem-ory *** TW-GA method requires 5.47 s and the MOCsFO method requires 30 s for software test case optimization.

关键词： Equivalent mutation fault diagnosis hospital information system software test case optimization tournament winner genetic algorithm

用于手部感知运动功能的经皮神经电刺激和功能性电刺激器集成设计

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用于手部感知运动功能的经皮神经电刺激和功能性电刺激器集成设计

作者：阿米尔可汗（Amir khan）山东大学

学位级别：硕士

人的手是一种神奇的工具,具有多种功能。手部感觉运动功能涉及与受体转导和编码、神经传导、中枢处理和肌肉激活相关的复杂控制回路。人手具有高度的灵活性,可以保持各种姿势,同时能够精确控制到达、抓握、举起和握住物体所需的力。这... 详细信息

人的手是一种神奇的工具,具有多种功能。手部感觉运动功能涉及与受体转导和编码、神经传导、中枢处理和肌肉激活相关的复杂控制回路。人手具有高度的灵活性,可以保持各种姿势,同时能够精确控制到达、抓握、举起和握住物体所需的力。这归因于骨骼的灵活性和稳定性、肌肉力量和神经感觉反馈。手部感觉运动功能对于日常生活中的多项任务所必需的抓握和操作非常重要。感官反馈用于评估对象的大小、形状、重量和质地。大脑需要准确地解释来自手的传入感觉信息,以保证成功地达到、抓住、操纵物体。在各种肌肉骨骼疾病或意外创伤中,手的感觉运动功能容易受到肌肉、神经或肌腱损伤。腕管综合征、肘管综合征、De Quervain腱鞘炎、外上髁炎、胸廓出口综合征、扳机指、桡管综合征和肌腱炎是最常见的感觉运动障碍。手或手指的截肢也可能严重损害手的感觉运动功能。受损的手部感觉运动功能可能对日常活动产生重大影响,例如穿衣、写作、烹饪或任何其他手动任务,特别是对于高精度运动任务。为了恢复手部感觉运动功能,可以使用多种技术。最近,电刺激已被广泛研究并推荐用于感觉运动功能的恢复。经皮电神经刺激（Transcutaneous Electrical Nerve stimulation,TENs）使用带有小电极的低强度刺激电脉冲来激活神经,以实现感觉恢复、疼痛缓解和触觉诱发。功能性电刺激（Functional Electrical stimulation,FEs）采用带有大电极的低强度刺激电脉冲来驱动肌肉执行特定的功能任务,即肌肉强化和恢复瘫痪或减弱的肌肉活动。为不同的感觉和功能应用领域开发的电刺激器仅限于单一操作模式,即用于感觉恢复的TENs和用于运动功能控制的FEs。由于软件和硬件的功能和可编程性不足,该设计无法扩展到其他应用程序。本研究的目标是在单个原型上开发一种新颖的、完全可编程的、集成的 FEs 和TENs系统,用于手的感觉运动功能,其中:第二章介绍了 TENs在单个原型上的手部感觉和运动功能的集成设计,第三章和第四章研究了 TENs用于指尖力控制,第五章分析了基于FEs的手部运动刺激技术。各章节具体内容如下:第二章提出了一种在手部感觉运动功能的单一原型上集成功能性电刺激器和经皮神经电刺激器的新型系统。该设备的新颖组件涉及两种操作模式——FEs和TENs,在单个设备上具有可控的频率、脉冲宽度、刺激强度和多形状脉冲。升压转换器控制刺激强度;一个Arduino Uno微控制器控制频率和脉冲宽度;H桥产生方波脉冲,拨动开关监控操作模式,RC滤波器产生多个形状脉冲。使用可变参数和多个形状脉冲分析了设备的FEs和TENs模式。这种新设计为FEs和TENs实现了低成本（低于50美元）、低输入（9 V）和多形状刺激脉冲,具有变频控制、可控脉冲宽度和更小的设备尺寸一个原型。与单模刺激器相比,这种设计使FEs和TENs具有更低的电压输出（小于35 V）更实用、更安全。第三章和第四章分析了通过感官诱导的指尖力控制设计装置的TENs模式。感觉反馈恢复在唤起手和大脑之间的触觉和双向传入通道通信方面起着至关重要的作用。经皮电神经刺激个体参数被广泛研究用于唤起触觉,但两个参数的相互调制和通过TENs参数控制指尖力在唤起触觉方面需要研究。本研究旨在开发一种同时调节两个个体参数的方案,通过个体和相互控制的刺激参数来控制受试者的指尖力,并比较分析这些参数对诱发触觉的指尖力控制的影响。两种创新的刺激参数（直接、反向）是通过以直接和反向线性关系同时调制脉冲宽度和频率参数来开发的。为了引起指尖力控制的触觉,相互参数和单个参数以连续和离散的范式进行操作。在这两种范式中,受试者的指尖反应力与刺激参数力的诱发感觉有关,分析了灵敏度、反应时间、反应延迟、受试者指尖反应力对刺激力的模拟以及每个参数的适应性。结果发现,与单个参数相比,互参数的灵敏度、响应时间、模拟对象指尖响应力对刺激的模拟以及对刺激力感觉变化的辨别力较高,但在离散范式中,逆参数适应度较高。这项研究可能为智能假肢中的指尖力控制、抓握力和计算机触摸屏手势中的指尖力控制提供一种新的方法。最后第五章研究了设计的双指捏力装置的FEs模式。由于并非所有手指的肌肉都受到独立刺激,因此当以传统方法刺激正中神经和尺神经以驱动手部运动功能时,相应手指会发生意外驱动。采用FEs的新手背腰部和外展肌刺激方法适用于研究FEs参数幅度强度、频率和脉冲宽度对精确两位数握力、两位数力矢量的协调角、驱动角度、频率的影响数字驱动的脉冲宽度有效范围,以产生准确的数字弯曲。振幅强度使手指在20到34 V之间弯曲,但是频率和脉冲宽度从未使手指弯曲到20 V以下,而只会影响以高振幅强度弯曲的手指。对于高于20 V的电压,100-200 μ s的脉冲宽度和20-55 Hz的频率保持弯曲手指的强烈驱动,但是超出这些范围,

关键词：感觉运动功能经皮神经电刺激器功能性电刺激器触觉手指弯曲精确抓握

spotted Hyena-Bat Optimized Extreme Learning Machine for solar Power Extraction

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Computer systems science & Engineering 2023年第5期45卷 1821-1836页

作者： K.Madumathi s.Chandrasekar Faculty of Electrical and Electronics Engineering Mahendra Institute of TechnologyNamakkalTamilnaduIndia Faculty of Electrical and Electronics Engineering Sona College of TechnologySalemTamilnaduIndia

Artificial intelligence,machine learning and deep learning algorithms have been widely used for Maximum Power Point Tracking(MPPT)in solar *** the traditional MPPT strategies,following of worldwide Global Maximum Power Point(GMPP)under incomplete concealing conditions stay overwhelming assignment and tracks different nearby greatest power focuses under halfway concealing *** advent of artificial intelligence in MPPT has guaranteed of accurate following of GMPP while expanding the significant performance and efficiency of MPPT under Partial shading Conditions(PsC).still the selection of an efficient learning based MPPT is complex because each model has its advantages and ***,Meta-heuristic algorithm based Learning techniques have provided better tracking efficiency but still exhibit dull performances under *** work represents an excellent optimization based on spotted Hyena Enabled Reliable BAT(sHERB)learning models,sHERB-MPPT integrated with powerful extreme learning machines to identify the GMPP with fast convergence,low steady-state oscillations,and good tracking *** testing using MATLAB-sIMULINK,with 50000 data combinations gathered under partial shade and normal *** a result of simulations,the proposed approach offers 99.7%tracking efficiency with a slower convergence *** demonstrate the predominance of the proposed system,we have compared the performance of the system with other hybrid MPPT learning *** proved that the proposed cross breed MPPT model had beaten different techniques in recognizing GMPP viably under fractional concealing conditions.

关键词： Global maximum power point tracking artificial intelligence machine learning deep learning spotted hyena-BAT algorithm