检索结果-南通市图书馆

Rhombencephalitis caused by Listeria monocytogenes with hydrocephalus and intracranial hemorrhage:A case report and review of the literature

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2019年第4期7卷 538-547页

作者： jing-jing Liang xiao-Yan He Hong Ye Department of Neurology Wuhan University Renmin Hospital Department of Neurology Shijiazhuang Second Hospital Department of Neurology Xuanwu Hospital Capital Medical University

BACKGROUND Listeria monocytogenes(L. monocytogenes), a Gram-positive facultatively intracellular bacterium, is the causative agent of human listeriosis. Listeria infection is usually found in immunocompromised patients, including elderly people, pregnant women, and newborns, whereas it is rare in healthy people. *** may cause meningitis, meningoencephalitis, and some very rare and severe complications, such as hydrocephalus and intracranial hemorrhage,which cause high mortality and morbidity worldwide. Up to now, reports on hydrocephalus and intracranial hemorrhage due to L. monocytogenes are *** SUMMARY We herein report a case of rhombencephalitis caused by L. monocytogenes in a 29-year-old man. He was admitted to the hospital with a 2-d history of headache and fever. He consumed unpasteurized cooked beef two days before *** medical history included type 2 diabetes mellitus, and contaminated beef intake 2 d before onset. Cerebrospinal fluid analysis revealed Gram-positive rod infection, and blood culture was positive for L. monocytogenes. Magnetic resonance imaging findings suggested rhombencephalitis and *** was started empirically and then modified according to the blood culture results. Repeated CT images were suggestive of intracranial *** the patient underwent aggressive external ventricular drainage, he died of a continuing deterioration of intracranial *** Hydrocephalus, intracranial hemorrhage, and inappropriate antimicrobial treatment are the determinations of unfavorable outcomes.

关键词： Rhombencephalitis Listeria monocytogenes Central nervous system infections Hydrocephalus Intracranial hemorrhage Case report

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于单源多段图方法的多目标决策算法与应用

计算机技术与发展 2009年第11期19卷 4-6,10页

作者：宋静景小宁赵宗涛空军工程大学工程学院陕西西安710038 第二炮兵工程学院陕西西安710025

单源多段图方法是解决系统规划中单目标决策问题的有效方法,但在大量的工程应用中所要解决的往往是多目标决策问题,其数学模型较为复杂,设计算法也比较困难,是研究的难点热点之一。文中提出一种基于单源多段图方法的多目标决策算法。主... 详细信息

单源多段图方法是解决系统规划中单目标决策问题的有效方法,但在大量的工程应用中所要解决的往往是多目标决策问题,其数学模型较为复杂,设计算法也比较困难,是研究的难点热点之一。文中提出一种基于单源多段图方法的多目标决策算法。主要做法是:将m个目标,分别用单源多段图方法求其最小(大)代价,而后,将多目标因素化成无量纲数,再将各种目标因素所占的权重μ1,μ2,…μm,进行分配,最后再求其最小,从而得到结果。也就是mincost=min(μ1c1+μ2c2+…+μmcm),其中ci代表第i个目标因素的最小代价。还设计了相应的算法,并求其复杂度T(n)=O(cmn),其中m为目标数,n为多段图节点的个数,c是计算多段图中任意节点到终点的计算量。文中给出了计算实例。经我单位在运输实际的规划计算中应用证明,比经验算法可节省代价21.3%。

关键词：多目标决策 Dijkstra算法工程规划

Study of Pre-equilibrium Fission Based on Diffusion Model

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2006年第2期45卷 325-331页

作者： SUN xiao-Jun ZHANG jing-Shang College of Physics and Information Technology Guangxi Normal University Guilin 541004 China China Institute of Atomic Energy P.O. Box 275（41） Beijing 102413 China

In terms of numerical method of Smoluchowski equation the behavior of fission process in diffusion model has been described and analyzed, including the reliance upon time, as well as the deformation parameters at several nuclear temperatures in this paper. The fission rates and the residual probabilities inside the saddle point are calculated for fissile nucleus n＋^238U reaction and un-fissile nucleus p＋^208Pb reaction. The results indicate that there really exists a transient fission process, which means that the pre-equillbrium fission should be taken into account for the fissile nucleus at the high temperature. Oppositely, the pre-equilibrlum fission could be neglected for the un-fissile nucleus. In the certain case the overshooting phenomenon of the fission rates will occur, which is mainly determined by the diffusive current at the saddle point. The higher the temperature is, the more obvious the overshooting phenomenon is. However, the emissions of the light particles accompanying the diffusion process may weaken or vanish the overshooting phenomenon.

关键词： pre-equilibrium fission diffusion model fissile nucleus un-fissile nucleus

Analytic solutions for generalized PT-symmetric Rabi models

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2019年第11期28卷 161-167页

作者： Yuanhao Dong Wen-jing Zhang jing Liu xiao-Tao Xie School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710119China School of Physics Northwest UniversityXi’an 710069China

We theoretically investigate the exact solutions for generalized parity–time(PT)-reversal-symmetric Rabi models driven by external fields with monochromatic periodic, linear, and parabolic forms, respectively. The corresponding exact solutions are presented in terms of the confluent Heun equations without any approximation. In principle, the analytic solutions derived here are valid in the whole parameter space. Such a kind of study may offer potential coherent control schemes of the PT-symmetric two-level systems.

关键词： Rabi model PT symmetry population dynamics

The role of circulating miRNAs in multiple myeloma

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2015年第12期58卷 1262-1269页

作者： ZHANG Ji xiao xiaoJuan LIU jing Department of Hematology The First Affiliated Hospital University of South China State Key Laboratory of Medical Genetics & School of Life Sciences Central South University

Multiple myeloma(MM) is a common malignant hematological disease. Dysregulation of micro RNAs(mi RNAs) in MM cells and bone marrow microenviroment has important impacts on the initiation and progression of MM and drug resistance in MM cells. Recently, it was reported that MM patient serum and plasma contained sufficiently stable mi RNA signatures, and circulating mi RNAs could be identified and measured accurately from body fluid. Compared to conventional diagnostic parameters, the circulating mi RNA profile is appropriate for the diagnosis of MM and estimates patient progression and therapeutic outcome with higher specificity and sensitivity. In this review, we mainly focus on the potential of circulating mi RNAs as diagnostic, prognostic, and predictive biomarkers for MM and summarize the general strategies and methodologies for identification and measurement of circulating mi RNAs in various cancers. Furthermore, we discuss the correlation between circulating mi RNAs and the cytogenetic abnormalities and biochemical parameters assessed in multiple myeloma.

关键词： mi RNA multiple myeloma biomarker diagnosis

Convergence of some finite element iterative methods related to different Reynolds numbers for the 2D/3D stationary incompressible magnetohydrodynamics

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2016年第3期59卷 589-608页

作者： DONG xiao jing HE Yin Nian School of Mathematics and Statistics Xi'an Jiaotong University

Based on the finite element method(FEM), some iterative methods related to different Reynolds numbers are designed and analyzed for solving the 2D/3D stationary incompressible magnetohydrodynamics(MHD) numerically. Two-level finite element iterative methods, consisting of the classical m-iteration methods on a coarse grid and corrections on a fine grid, are designed to solve the system at low Reynolds numbers under the strong uniqueness condition. One-level Oseen-type iterative method is investigated on a fine mesh at high Reynolds numbers under the weak uniqueness condition. Furthermore, the uniform stability and convergence of these methods with respect to equation parameters R_e, R_m, S_c, mesh sizes h, H and iterative step m are provided. Finally, the efficiency of the proposed methods is confirmed by numerical investigations.

关键词： stationary incompressible magnetohydrodynamics finite element method iterative method twolevel algorithms

Mathematical model of electric hydraulic and powered support control system at a plough mining face

在线全文

学校读者我要写书评

暂无评论

Journal of China University of Mining and Technology 2008年第1期18卷 55-58页

作者： ZHANG Wei HAN xiao SUN jing-jing School of Mechanical EleCtronic and Information Engineering China University of Mining ＆ Technology Beijing 100083 China

Given the actual working of a fully mechanized plough at a mining face, we have proposed a formula for running constraints between powered supports and a coal plough under assumed geological conditions of the coal face and, on this basis, established an automatic control model of powered supports for the coal plough face. We introduced the working principle of the powered support control system of the plough at the mining face. We established three advanced characteristics of this control system： response speed, reliability and easy maintenance of the system. As well, we briefly introduced, the principal function of primary and subordinate controllers and the realization of the communication system by a Single Bus. Ten controllers were constructed and tested in our laboratorium. The results show that the control model is practical and meets actual conditions. It provides a theoretical basis for designing a comouter control system for a oowered support system of a plough at a mining face.

关键词： plough mining face powered supports constraints automatic control model

Mechanical properties of bee Fe-Cr alloys by first-principles simulations

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2012年第3期7卷 360-365页

作者： xiao-qingLi Ji-junZhao jing-chengXu Key Laboratory of Materials Modification by Laser Electronand Ion BeamsDalian University of TechnologyMinistry of EducationDalian116024China College of Advanced Scienceand Technology.Dalian University of Technology Dalian116024China

The effect of chromium content on the fundamental mechanical properties of Fe-Cr alloys has been studied by first-principles calculations. Within a random solid solution model, the lattice constants and the elastic constants of ferromagnetic bcc Fel-xCrx （04 x 40.156） alloys were calculated for different compositions. With addition of Cr content, the lattice parameters of Fe-Cr alloys are larger than that of pure Fe solid, and the corresponding Young＇s modulus and shear modulus rise non- monotonically with the increasing Cr content. All alloys （except 9.4 at% Cr） exhibit less ductile behavior compared with pure bcc Fe. For the Fel-xCrx （04 x 40.156） alloys, the average magnetic moment per atom decreases linearly with the increasing Cr concentration.

关键词： Fe-Cr alloys mechanical properties lattice constant magnetic moment

Electrochemical conversi on of carb on dioxide in molten salts:In-situ and beyond

维普期刊数据库评论

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 Energy Chemistry 2022年第1期31卷 404-405,I0011页

作者： Shuangxi jing Mingyong Wang Wei xiao College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power SourcesWuhan UniversityWuhan 430072HubeiChina State Key Laboratory of Advanced Metallurgy University of Science and TechnologyBeijingBeijing 100083China

The state-of-the-art industry based on carb on-inte nsive energy causes major concerns on energy and environmental *** on n eutrality is now a worldwide con sensus and an imperative *** capture and/or conversion of carbon dioxide(CO_(2))is key-enabling to achieve carbon *** of the aforenamed task lie in the chemical inertness of CO_(2) and costly separation of CO_(2) from flue *** and conversion of CO_(2) on the occasions of gen eration,namely in-situ CO_(2) conversi on,are highly desired.

关键词： dioxide salts neutral