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Lipschitz and Total-Variational regularization for Blind Deconvolution

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Communications in Computational Physics 2008年第6期4卷 195-206页

作者： Yu-Mei Huang Michael k.Ng Centre for Mathematical Imaging and Vision and Department of Mathematics Hong Kong Baptist UniversityKowloon TongHong Kong. Department of Mathematics Lanzhou UniversityGansuChina.

In[3],Chan and Wong proposed to use total variational regularization for both images and point spread functions in blind *** experimental results show that the detail of the restored images cannot be *** this paper,we consider images in Lipschitz spaces,and propose to use Lipschitz regularization for images and total variational regularization for point spread functions in blind *** experimental results show that such combination of Lipschitz and total variational regularization methods can recover both images and point spread functions quite well.

关键词： Lipschitz regularization total variational regularization blind deconvolution texture Poisson singular integral alternating iterative algorithm.

Modeling and optimal design of LLC resonant converter using whale optimization algorithm

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International Journal of Modeling, Simulation, and Scientific Computing 2018年第6期9卷 211-233页

作者： k.S.Sarath S.Sekar Department of Electrical and Electronics Engineering Hindustan University PadurKelambakam ChennaiTamil Nadu-603103India

resonant converter(rC)was brought under research in the 80’s widely,which can attain very small switching loss,therefore,facilitating resonant topologies to function at the high switching *** is well addressed in the review that the optimal parameterization of the resonant converter is a crucial *** the literature has come out with different methodologies,they are highly conceptual and so the uncertainty due to high theoretical impact *** paper intends to develop a Parameter Optimization(PO)algorithm for designing and developing of *** proposed algorithm overwhelms the limitation by introducing a nonconceptual model based on the simulated ***,the resonant current under start-up conditions is acquired from the literary outcome,and the intelligent model is *** on the proposed model,a renowned search algorithm called as Whale Optimization Algorithm(WOA)is exploited to optimize the time constant of the resonant converter,which is a critical design *** objective model is derived as a function of start-up time and so the start-up time can be ***,the response speed of the output voltage is also *** proposed Whale Optimization Algorithm based Parameter Optimization(WOAPO)is compared with the conventional techniques such as IAPO,Ant Bee Colony-PO(ABC-PO),Particle Swarm Optimization-PO(PSOPO),FireFly PO(FFPO)and Grey Wolf Optimization(GWOPO).The obtained result verifies the performance of the proposed method in modeling LLC-rC system.

关键词： LLC resonant converter parameter optimization whale optimization output voltage resonant inductor current,rMSE.

A taxonomic assessment and redefinition of the Lucanus fortunei species group in China (Coleoptera: Lucanidae: Lucaninae)

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Zoological Systematics 2023年第4期48卷 279-360页

作者： Zhihong Zhan Daniel k.Young Department of Entomology College of Plant ProtectionNanjing Agricultural UniversityNanjing 210000China Department of Entomology University of WisconsinMadisonWI53706USA

This study focused on and examined the traditional Lucanus fortunei group comprising more than 60%of all Lucanus taxa in *** species treatment includes a description,distribution,collecting methods,natural history and digital habitus and other pertinent images.A dichotomous taxonomic key was created specific to the Chinese *** group and the related *** Lucanus fortunei group is arguably the largest group in terms of species richness in Lucanus Scopoli;however,the group definition is unclear and needs to be critically assessed and *** work and sampling of the Chinese Lucanus fortunei species group was conducted between summer,2017 and summer,*** sites included Anhui,Zhejiang,Fujian,Taiwan,Jiangxi,Hubei,Hunan,Guizhou,Sichuan,Chongqing,Yunnan,Xizang,Guangdong,and Guangxi ***-two taxa(species and subspecies),including 473 specimens,previously considered to fall within the scope of the Lucanus fortunei group were examined by morphological *** new groups,the Lucanus brivioi group,the Lucanus kraatzi group,and the Lucanus parryi group are proposed and separated from the traditional Lucanus fortunei group,based on morphological *** subspecies,*** laetus,is proposed as the synonym of the nominate subspecies.

关键词： Stag beetles Lucanus group definition taxonomy synonym

Software Operational Profile Based Test Case Allocation Using Fuzzy Logic

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International Journal of Automation and computing 2007年第4期4卷 388-395页

作者： k.Saravana kumar ravindra Babu Misra reliability Engineering Center Indian Institute of TechnologyKharagpur 721302India

Software operational profile （SOP） is used in software reliability prediction, software quality assessment, performance analysis of software, test case allocation, determination of ＂when to stop testing,＂ etc. Due to the limited data resources and large efforts required to collect and convert the gathered data into point estimates, reluctance is observed by the software professionals to develop the SOP. A framework is proposed to develop SOP using fuzzy logic, which requires usage data in the form of linguistics. The resulting profile is named fuzzy software operational profile （FSOP）. Based on this work, this paper proposes a generalized approach for the allocation of test cases, in which occurrence probability of operations obtained from FSOP are combined with the criticality of the operations using fuzzy inference system （FIS）. Traditional methods for the allocation of test cases do not consider the application in which software operates. This is intuitively incorrect. To solve this problem, allocation of test cases with respect to software application using the FIS model is also proposed in this paper.

关键词： Software reliability software operational profile criticality fuzzy logic test case allocation.

A vibration-based structural damage detection method and its applications to engineering structures

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International Journal of Smart and Nano Materials 2011年第3期2卷 194-218页

作者： k.He W.D.Zhu Department of Mechanical Engineering University of MarylandBaltimore County1000 Hilltop CircleBaltimoreMD 21250USA

Two major challenges associated with avibration-based damage detection method using changes in natural frequencies are addressed:accurate modeling of structures and the development of a robust inverse algorithm to detect damage,which are defined as the forward and inverse problems,*** resolve the forward problem,new physics-based finite element modeling techniques are developed for fillets in thin-walled beams and for bolted joints,so that complex structures can be accurately modeled with a reasonable model *** resolve the inverse problem,a logistic function transformation is introduced to convert the constrained optimization problem to an unconstrained one,and a robust iterative algorithm using the Levenberg–Marquardt method is developed to accurately detect the locations and extent of *** new methodology can ensure global convergence of the iterative algorithm in solving under--determined system equations and deal with damage detection problems with relatively large modeling error and measurement *** is applied to various engineering structures including lightning masts,a space frame structure and one of its components,and a *** exact locations and extent of damage can be detected in the numerical simulation,and the locations and extent of damage can be successfully detected in experimental damage detection.

关键词： natural frequency forward problem inverse problem Levenberg-Marquardt method logistic function transformation

Microstructural relation of macerals with mineral matter in coals from Ib valley and Umaria, Son-Mahanadi basin, India

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International Journal of Coal Science & Technology 2017年第2期4卷 191-197页

作者： Vivek Mishra k. N. Singh CSIr - National Metallurgical Laboratory Jamshedpur 831007 India School of Studies in Earth Science Vikram UniversityUjjain 456010 India

Coal petrology provides significant inputs for the industrial utilisation of coal and for broad understanding the coal formation and diagenesis. The present paper entails the results of the investigations carded out on the selected coal samples, from Ib valley and Umaria coalfield, using scanning electron microscope （SEM） and X-ray diffraction （XrD） to study the surface microstructures and minerals present in them and the relationship of the finely dispersed mineral matter with the organic constituents. This would further help in evaluating the distribution and chemical character of the mineral matter occurring within the maceral types. Ib valley and Umaria coals are typical Indian （Lower Gondwana） non-coking coals and only scanty data is available on SEM study of these coals. Under SEM examination, it manifests that, the mineral matters of these coal occur as deep intergrowth, massive impregnation, superficial mounting, filling and depletion of micropores, mechanical cavity filling and fusinitic cavity filling.

关键词： Coal SEM XrD Umaria coal Ib valley coal India

Microstructure and hardness of Mg-based composites reinforced with Mg_2Si particles

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rare Metals 2009年第4期28卷 396-400页

作者： Mustafa Aydin Cem zgür Osman San Mechanical Engineering Department Dumlupinar University Ceramic Engineering Department Dumlupinar University

Magnesium powders were mechanically alloyed with SiO2 powder particles having different particle sizes using nigh-energy ball milling techniques under Ar atmosphere for 1 h. The powders were consolidated with cold pressing under 560 MPa. They were then sintered at 550℃ for 45 min under Ar atmosphere. The composites obtained on the Mg-SiO2 system were investigated using the Archimedes principle, a differential scanning calorimeter, X-ray diffraction, optic microscopy, and scanning electron microscopy. For the mechanically alloyed powders, the solid-state reaction of the synthesis of Mg2Si and MgO progressed further during sintering of the materials. The results showed that the strengthening mechanisms were dependent on dispersion hardening of fine Mg2Si and MgO particulates dispersed homogeneously in the matrix. Mg-

关键词： based composites SiO2 mechanical alloying strengthening mechanism

Gastric cystica profunda:Another indication for minimally invasive endoscopic resection techniques?

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World Journal of Gastroenterology 2024年第27期30卷 3278-3283页

作者： Harjot k Bedi Douglas Motomura Neal Shahidi Department of Medicine University of British ColumbiaVancouver V6Z 2K5BCCanada

Gastric cancer presents a significant global health burden,as it is the fifth most common malignancy and fourth leading cause of cancer mortality *** in incidence rates across regions underscores the multifactorial etiology of this *** overall 5-year survival rate remains low despite advances in its diagnosis and *** surgical gastrectomy was previously standard-of-care,endoscopic resection techniques,including endoscopic mucosal resection and endoscopic submucosal dissection(ESD)have emerged as effective alternatives for early *** to surgical resection,endoscopic resection techniques have comparable 5-year survival rates,reduced treatment-related adverse events,shorter hospital stays and lower *** also enables en bloc resection,thus affording organ-sparing curative endoscopic resection for early *** this editorial,we comment on the recent publication by Geng et al regarding gastric cystica profunda(GCP).GCP is a rare gastric pseudotumour with the potential for malignant *** presents a diagnostic challenge due to its nonspecific clinical manifestations and varied endoscopic *** are several gaps in the literature regarding the diagnosis and management of GCP which warrants further research to standardize patient *** in endoscopic resection techniques offer promising avenues for GCP and early gastric cancers.

关键词： Early gastric cancer Endoscopy Endoscopic submucosal dissection Gastric cystica profunda

Analyzing Effect of Demand rate on Safety of Systems with Periodic Proof-tests

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International Journal of Automation and computing 2007年第4期4卷 335-341页

作者： Manoj kumar A.k.Verma A.Srividya Control Instrumentation Division Bhabha Atomic Research CentreTrombayMumbai 400085India reliability Engineering Group Indian Institute of Technology BombayPowaiMumbai 400076India

Quantitative safety assessment of safety systems plays an important role in decision making at all stages of system lifecycle, i.e., design, deployment and phase out. Most safety assessment methods consider only system parameters, such as configuration, hazard rate, coverage, repair rate, etc. along with periodic proof-tests （or inspection）. Not considering demand rate will give a pessimistic safety estimate for an application with low demand rate such as nuclear power plants, chemical plants, etc. In this paper, a basic model of IEC 61508 is used. The basic model is extended to incorporate process demand and behavior of electronic- and/or computer-based system following diagnosis or proof-test. A new safety index, probability of failure on actual demand （PFAD） based on extended model and demand rate is proposed. Periodic proof-test makes the model semi-Markovian, so a piece-wise continuous time Markov chain （CTMC） based method is used to derive mean state probabilities of elementary or aggregated state. Method to determine probability of failure on demand （PFD）（IEC 61508） and PFAD based on these state probabilities are described. In example, safety indices of PFD and PFAD are compared.

关键词： Probability of failure on demand fail safe Markov model continuous time Markov chain IEC 61508 diagnosis repair proof-test demand safety system.