检索结果-南通市图书馆

Thickness-dependent coercivity mechanism and hysteresis loops in hard/soft magnets

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2020年第1期39卷 22-27页

作者： xiao-Jiao Weng Guo-Ping Zhao Hong Tang Lai-chuan Shen Yao xiao College of Physics and Electronic Engineering Sichuan Normal UniversityChengdu610101China Collaborative Innovation Center for Shanxi Advanced Permanent Materials and Technology Linfen041004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004China

Two models are established to reveal the underlying coercivity mechanism for SmCo/Fe films,where one model considers a transition layer between hard and soft layers,while the other model does not consider this *** on the two models,hysteresis loops,nucleation fields and coercivity are obtained by one-dimensional(1 D)and three-dimensional(3 D)micromagnetic *** particular,the calculated nucleation fields(H_N)and coercivity(H_C)match very well with the experimental *** is found that the increase in the soft phase thickness(Ls)leads to a transition of the coercivity mechanism from nucleation to *** a pinning is inherently related to nucleation and has both attributes of traditional nucleation and pinning,called as a hybrid coercivity mechanism *** is general for all hard/soft composites and can be extended to single-phased permanent magnets where defects are inevitable.

关键词： Coercivity mechanism Nucleation Pinning Hysteresis loops

Sliced Average Variance Estimation for Tensor Data

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2024年第3期40卷 630-655页

作者： chuan-quan LI Pei-wen xiao Chao YING xiao-hui LIU School of Statistics Jiangxi University of Finance and EconomicsNanchang 330013China Key Laboratory of Data Science in Finance and Economics Jiangxi University of Finance and EconomicsNanchang 330013China Biostatistics and Medical Informatics University of Wisconsin MadisonMadison 53726USA

Tensor data have been widely used in many fields,e.g.,modern biomedical imaging,chemometrics,and economics,but often suffer from some common issues as in high dimensional *** to find their low-dimensional latent structure has been of great interest for *** this end,we develop two efficient tensor sufficient dimension reduction methods based on the sliced average variance estimation(SAVE)to estimate the corresponding dimension reduction *** first one,entitled tensor sliced average variance estimation(TSAVE),works well when the response is discrete or takes finite values,but is not■consistent for continuous response;the second one,named bias-correction tensor sliced average variance estimation(CTSAVE),is a de-biased version of the TSAVE *** asymptotic properties of both methods are derived under mild *** and real data examples are also provided to show the superiority of the efficiency of the developed methods.

关键词： tensor data sliced average variance estimation sufficient dimension reduction central subspace

On Some Computational Problems in Local Fields

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2022年第3期35卷 1191-1200页

作者： deng Yingpu LUO Lixia PAN Yanbin xiao Guanju Key Laboratory of Mathematics Mechanization NCMISAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China

Lattices in Euclidean spaces are important research objects in geometric number theory,and they have important applications in many areas,such as *** shortest vector problem(SVP)and the closest vector problem(CVP)are two famous computational problems about *** this paper,we consider p-adic lattices in local fields,and define the p-adic analogues of SVP and CVP in local *** authors find that,in contrast with lattices in Euclidean spaces,the situation is different and *** SVP in Euclidean spaces corresponds to the Longest Vector Problem(LVP)in local *** authors develop relevant algorithms,indicating that these problems are computable.

关键词： CVP lattice LVP local field SVP

High mortality associated with gram-negative bacterial bloodstream infection in liver transplant recipients undergoing immunosuppression reduction

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2020年第45期26卷 7191-7203页

作者： Fang Chen xiao-Yun Pang chuan Shen Long-Zhi Han Yu-xiao deng xiao-Song Chen Jian-Jun Zhang Qiang Xia Yong-Bing Qian Department of Pharmacy Renji HospitalSchool of MedicineShanghai Jiaotong UniversityShanghai 200127China Department of Liver Surgery Renji HospitalSchool of MedicineShanghai Jiaotong UniversityShanghai 200127China Department of Critical Care Medicine Renji HospitalSchool of MedicineShanghai Jiaotong UniversityShanghai 200127China

BACKGROUND Immunosuppression is an important factor in the incidence of infections in transplant *** studies are available on the management of immunosuppression(IS)treatment in the liver transplant(LT)recipients complicated with *** aim of this study is to describe our experience in the management of IS treatment during bacterial bloodstream infection(BSI)in LT recipients and assess the effect of temporary IS withdrawal on 30 d mortality of recipients presenting with severe *** To assess the effect of temporary IS withdrawal on 30 d mortality of LT recipients presenting with severe *** A retrospective study was conducted with patients diagnosed with BSI after LT in the Department of Liver Surgery,Renji Hospital from January 1,2016 through December 31,*** recipients diagnosed with BSI after LT were *** and multivariate Cox regression analysis of risk factors for 30 d mortality was conducted in the LT recipients with Gram-negative bacterial(GNB)*** Seventy-four episodes of BSI were identified in 70 LT recipients,including 45 episodes of Gram-positive bacterial(GPB)infections in 42 patients and 29 episodes of GNB infections in 28 ***,IS reduction(at least 50%dose reduction or cessation of one or more immunosuppressive agent)was made in 28(41.2%)cases,specifically,in 5(11.9%)cases with GPB infections and 23(82.1%)cases with GNB *** 180 d all-cause mortality rate was 18.5%(13/70).The mortality rate in GNB group(39.3%,11/28)was significantly higher than that in GPB group(4.8%,2/42)(P=0.001).All the deaths in GNB group were attributed to worsening infection secondary to IS withdrawal,but the deaths in GPB group were all due to graft-versus-host *** group was associated with significantly higher incidence of intra-abdominal infection,IS reduction,and complete IS withdrawal than GPB group(P<0.05).Cox regression showed that rejection(adjusted hazard ratio 7.021,P=0.

关键词： Immunosuppressive therapy Liver transplantation Bloodstream infection Multidrug-resistant gram-negative bacterium

Simulation research on oxygen mass transfer between steel and slag in IF steel refining process

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2020年第4期27卷 409-419页

作者： Ai-jun deng Ding-dong Fan Hai-chuan Wang Can-hua Li School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243002AnhuiChina Key Laboratory of Metallurgical Emission Reduction&Resource Recycling(Ministry of Education) Ma’anshan 243002AnhuiChina

The effects of oxidizing slag on oxygen mass transfer and inclusions in different stages of IF(interstitial-free)steel refining were investigated by several heat simulation *** results of the experiments showed that the oxidizability of slag changed considerably during different refining *** the content of FeO in the slag within 1 wt.%would narrow the difference of slag oxidizability,stabilize the content of[Al]s in the steel,avoid secondary oxidation of molten steel by the slag,and reduce the *** the mass transfer of FeO in the slag phase was a limiting step,the secondary oxidation reaction occurred at the steel–slag interface;when the diffusion of oxygen in the molten steel was a limiting step,the secondary oxidation reaction took place inside the molten *** oxygen transfer rate was affected by the mass transfer coefficient of *** every 0.0001m/s increase in mass transfer coefficient,the oxygen transfer rate increased by about 2.2×10^-6 min^-*** changing the mass transfer coefficient,the oxygen transfer rate of the slag to the molten steel can be controlled.

关键词： IF steel Slag Steel–slag interface Inclusion Oxygen mass transfer Mass transfer coefficient

Disinfection Byproducts and Their Precursors in Drinking Water Sources:Origins,Influencing Factors,and Environmental Insights

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Engineering 2024年第5期36卷 36-50页

作者： Rong xiao Yang deng Zuxin Xu Wenhai Chu State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Ministry of Education Key Laboratory of the Yangtze River Water Environment Tongji UniversityShanghai 200092China Department of Earth and Environmental Studies Montclair State UniversityMontclairNJ 07043USA

Tracing the contamination origins in water sources and identifying the impacts of natural and human processes are essential for ecological safety and public ***,current analysis approaches are not ideal,as they tend to be laborious,time-consuming,or technically *** byproducts(DBPs)are a family of well-known secondary pollutants formed by the reactions of chemical disinfectants with DBP precursors during water disinfection *** DBP precursors have various origins(e.g.,natural,domestic,industrial,and agricultural sources),and since the formation of DBPs from different precursors in the presence of specific disinfectants is distinctive,we argue that DBPs and DBP precursors can serve as alternative indicators to assess the contamination in water sources and identify pollution *** providing a retrospective of the origins of DBPs and DBP precursors,as well as the specific formation patterns of DBPs from different precursors,this article presents an overview of the impacts of various natural and anthropogenic factors on DBPs and DBP precursors in drinking water *** practice,the DBPs(i.e.,their concentration and speciation)originally present in source water and the DBP precursors determined using DBP formation potential tests—in which water samples are dosed with a stoichiometric excess of specific disinfectants in order to maximize DBP formation under certain reaction conditions—can be considered as alternative *** jointly used with other water quality parameters(e.g.,dissolved organic carbon,dissolved organic nitrogen,fluorescence,and molecular weight distribution)and specific contaminants of emerging concern(e.g.,certain pharmaceuticals and personal care products),DBPs and DBP precursors in drinking water sources can provide a more comprehensive picture of water pollution for better managing water resources and ensuring human health.

关键词： Disinfection byproducts Disinfection byproduct precursors Drinking water sources Contamination indicator Natural factors Human factors

A survey on de novo assembly methods for single-molecular sequencing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Quantitative Biology 2020年第3期8卷 203-215页

作者： Ying Chen chuan-Le xiao State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-Sen UniversityGuangzhou 510275China

Background:The single-molecular sequencing(SMS)is under rapid development and generating increasingly long and accurate *** novo assembly of genomes from SMS sequences is a critical step for many genomic *** scale well with the developing trends of SMS,many de novo assemblers for SMS have been *** assembly workflows can be categorized into two different kinds:the correction-and-assembly strategy and the assembly-and-correction strategy,both of which are gaining more and more ***:In this article we make a discussion on the characteristics of errors in SMS sequences・We then review the currently widely applied de novo assemblers for SMS *** also describe computational methods relevant to de novo assembly,including the alignment methods and the error correction *** are provided to analyze their performance on different datasets and to provide use guides on applying the computation ***:We make a detailed review on the latest development of de novo assembly and some relevant algorithms for SMS,including their rationales,solutions and ***,we provide use guides on the algorithms based on their benchmark *** we conclude the review by giving some developing trends of third generation sequencing(TGS).

关键词： third generation sequencing single-molecular real-time sequencing sequence alignment sequence error correction de novo assembly

Numerical study on transom stern ventilation and resistance of high-speed ship in calm water

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2022年第5期34卷 864-875页

作者： Hui Wang Ren-chuan Zhu Meng-xiao Gu Le Zha State Key Laboratory of Ocean Engineering School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China Marine Design and Research Institute of China Shanghai200011China

A transom stern is a common design feature for a high-speed *** the present study,the transom stern ventilation of NPL 3b,5b hull is investigated by three methods:H−H formula,Doctors’formula,and computational fluid dynamics(CFD)method at *** the CFD method,the ratios of the wave elevation and wetted area are used to determine the transom *** of results show that Doctors’formula is more accurate to calculate the critical transom draft Froude *** then a Rankine panel method(RPM)based on the high-order boundary element method incorporated the modified transom stern condition is implemented to evaluate the steady wave problem of a high-speed fishery patrol ship in calm ***,free-surface(FS)and double body(DB)simulations based on Star-CCM+are carried out to obtain the wave-making resistance and total *** results of the resistance and wave pattern around the fishery patrol ship computed by RPM show generally good agreement with experimental measurement and CFD *** results indicate that the developed Rankine panel method with transom condition could predict the resistance of high-speed displacement ships with good accuracy.

关键词： Transom ventilation computational fluid dynamics(CFD)method Rankine panel method(RPM) high-speed ship double body simulation resistance

On Generic Extensions of Representations of a Dynkin Quiver of Type D

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2005年第3期21卷 613-622页

作者： xiao Qin deng Jiang Rong CHEN School of Sciences Beijing Jiaotong University Beijing 100044 P. R. China Department of Mathematics Beijing Normal University Beijing 100875 P. R. China

The notion of generic extensions of representations of a Dynkin quiver plays a big role in the study of the structure of the corresponding quantum group. In this paper, we describe the generic extensions of a simple representation by any representation and that of any representation by a simple representation of a Dynkin quiver Q of type D.

关键词： Dynkin quiver Representation Generic extension