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Diagnostic value of magnetic resonance cholangiopancreatography in choledocholithiasis

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World Journal of Gastroenterology 2015年第11期21卷 3351-3360页

作者： Wen Chen Jing-Jia Mo li lin Chao-Qun li Jian-Feng Zhang Department of Educational Administration The First Affiliated Hospital of Guangxi Medical University Department of Emergency The First Affiliated Hospital of Guangxi Medical University

AIM:To evaluate the diagnostic accuracy of magnetic resonance cholangiopancreatography(MRCP) in patients with ***:We systematically searched MEDlinE,EMBASE,Web of Science,and Cochrane databases for studies reporting on the sensitivity,specificity and other accuracy measures of diagnostic effectiveness of MRCP for detection of common bile duct(CBD) *** analysis was performed using random effects models,and receiver operating characteristic curves were generated to summarize overall test *** reviewers independently assessed the methodological quality of studies using standards for reporting diagnostic accuracy and quality assessment for studies of diagnostic accuracy ***:A total of 25 studies involving 2310 patients with suspected choledocholithiasis and 738 patients with CBD stones met the inclusion *** average inter-rater agreement on the methodological quality checklists was *** analysis of the ability of MRCP to detect CBD stones showed the following effect estimates:sensitivity,0.90(95%CI:0.88-0.92,χ2 = 65.80; P likelihood ratio,13.28(95%CI:8.85-19.94,χ2 = 78.95; P likelihood ratio,0.13(95%CI:0.09-0.18,χ2 = 6.27; P lication bias was not detected(P = 0.266).CONCLUSION:MRCP has high diagnostic accuracy for the detection of *** should be the method of choice for suspected cases of CBD stones.

关键词： Choledocholithiasis Diagnosis Magnetic resonance c

Crystal Structure of a Novel Supramolecule Made Up of Bis(μ_2-aqua)aqua(3-carboxy acrylate) monosodium(Ⅰ)

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Chemical Research in Chinese Universities 2002年第3期18卷 249-251页

作者： YUAN Ji xin HU Mao lin CHEN Di mei CHEN li chun Department of Chemistry Wenzhou Normal CollegeWenzhou 325003P.R.China

The title compound, bis( μ 2 aqua)(aqua)(3 carboxy acrylate) monosodium(Ⅰ), was synthesized in an ethanol water solution and its crystal structure was determined by means of X ray diffraction. The crystal is triclinic , space group P 1 with the cell parameters a =0 592 4(2) nm, b =0 635 7(3) nm, c =1 117 7(6) nm, α =104 18°, β =91 53°, γ =100 19°, V =0 400 6(3) nm 3, Z =2, the final R value is 0 033 5. The supramolecule is made up of coordination chains, which are further extended into a three dimensional network via the hydrogen bonding interactions.

关键词： 3-Carboxy acrylate monosodium(Ⅰ) Chain Intramolecular hydrogen Supramolecule

Influence of Annealing on Crystal Structure and Properties of SrBi_(2)Ta_(2)O_(9) Thin Films Prepared by Pulse Laser Deposition

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Chinese Physics Letters 1996年第12期13卷 934-936页

作者： YANG Ping-xiong ZHENG li-rong WANG lian-wei lin Cheng-lu State Key Laboratory of Functional Materials for Information Shanghai Institute of MetallurgyChinese Academy of SciencesShanghai 200050

The perovskite-like SrBi_(2)Ta_(2)O_(9)(SBT)thin films have been fabricated on Si/SiO_(2)/Ti/Pt substrate by pulse laser *** crystallization and ferroelectric property were clearly dependent on the annealing time and *** SBT thin film with fine grain size and well-saturated square hysteresis loop was obtained after annealing at 750℃ for *** ferroelectric properties were obtained from the SBT film annealed under this condition;Pr and Ec were 8.4μC/cm^(2) and 57kV/cm,respectively.

关键词： ferroelectric annealing film

Numerical Studies of Turbulent Flows in Channels with Abrupt Cross-sectional Changes

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南水北调与水利科技 2013年第1期11卷 J0007-J0015页

作者： CHEN Hao-liang lin Quan-hong Cheong Hin Fatt lin Peng-zhi Singapore-MIT Alliance for Research and Technology Singapore 138602 Department of Civil & Environmental Engineering National University of Singapore Singapore 117576 State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University Chengdu 610065 China

The turbulent flows through the channels with abrupt cross-sectional changes are common and importantphysical process in *** a better prediction of the mean flow and turbulent characteristics for this problem,atwo-dimensional depth-averaged numerical model is *** model is robust and accurate in reproducing therecirculation flow behind a groyne and turbulent flows in channels with abrupt cross-sectional changes,when com-pared to the available experimental data of mean velocities and turbulence kinetic *** results reveal that theabrupt cross-sectional change of a channel can affect the flow pattern significantly and introduces the complex turbu-lence *** particular,when the channel has an abrupt expansion,the mean flow pattern is mainly in lon-gitudinal direction with rather small transverse ***,a recirculating region forms behind the expan-sion position and the turbulence has very strong intensity within this *** the flow in the channel with an ab-rupt contraction,the longitudinal component of the flow is decreased by the obstruction on one side and accelerated onthe other side,whereas the transverse velocity is *** turbulence is extraordinarily strong in the regions adja-cent to the contraction wall in the narrow *** both cases of abrupt cross-sectional changes,the TKE is genera-ted dominantly by the shear of the longitudinal velocities.

关键词： turbulent flow open channel abrupt expansion abrupt contraction shallow water equation

Preliminary study on the safety and efficacy of a new polymyxin B-immoblized resin column in treatment of LPS-induced sepsis beagles

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Animal Models and Experimental Medicine 2022年第2期5卷 161-171页

作者： Yonggui li Zhenggen Yang Jialiang Hu Zhennan lin Research and Development Center Guangzhou Koncen Bioscience Co.Ltd.GuangzhouPR China Guangdong Provincial Key Laboratory of Hemoadsorption Technology GuangzhouPR China

Background:This study aims to assess the safety and efficacy of direct hemoperfu-sion using a new polymyxin B-immobilized resin column(disposable endotoxin ad-sorber,KCEA)in an endotoxin/lipopolysaccharide(LPS)-induced sepsis ***:Eighteen beagles were randomized into 1 intervention group(KCEA group,n=6)and 2 control groups(sham group and model group,n=6 each).Sepsis was in-duced by continuous intravenous application of 0.5 mg/kg body weight of endotoxin for 60 *** extracorporeal hemoperfusion device made with KCEA for endotoxin adsorption was *** group beagles received standard treatment with fluids and vasoactive drugs,KCEA group beagles received standard treatment and direct hemoperfusion of KCEA for 2 h,and sham group beagles were treated with standard treatment and direct hemoperfusion of a sham column for 2 ***:Good blood compatibility of KCEA was confirmed by assessing clinical *** endotoxin peak levels in the KCEA group were significantly lower,resulting in a significant suppression of IL-6,TNF-αand procalcitonin,which improved mean arterial pressure and significantly lowered vasopressor demand,thereby pro-tecting organ function and improving survival time and *** the KCEA group,MAP was significantly higher over 6 h than those recorded both in the sham group and model *** 7-day survival rates of the KCEA,sham and model groups were 50%,0%and 0%,***:KCEA hemoadsorption was effective at detoxifying circulatory endotoxin and inflammatory mediators and contributed to the decreased mortality rate in the sepsis beagles.

关键词： endotoxin hemoadsorption polymyxin B sulfate resin sepsis

Tectonomicrobiology:A new paradigm for geobiological research

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Science China Earth Sciences 2018年第4期61卷 494-498页

作者： Chuanlun ZHANG Jian lin Sanzhong li Hailiang DONG Fengping WANG Shucheng XIE Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Woods Hole Oceanographic Institution Woods HoleMassachusetts 02543USA Institute of Marine Geodynamics Ocean University of ChinaQingdao 266100China State Key Laboratory of Biogeology and Environmental Geology China University ofGeosciencesBeijing 430074China Department of Geology and Environmental Earth Science Miami UniversityOxfordOhio 45056USA State Key Laboratory of Microbial Metabolism and State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Geomicrobiology is a sub-discipline of geobiology and emphasizes the interaction between microorganisms and their environment on Earth. There is a need to explicitly emphasize the biogeochemical processes performed by microorganisms associated with Earth's tectonic activities, especially under the framework of the modern theory of plate tectonics. Tectonomicrobiology aims to create a better synergy between microbial and active tectonic processes. This explicit synergy should also foster better communications between solid Earth scientists and life scientists in terms of holistic Earth system dynamics at both tectonic and micro-scales.

关键词： Geobiology Geomicrobiology Tectonomicrobiology Tectonic activities Microbial evolution

Synthesis, structure and electrocatalytic H2-evoluting activity of a dinickel model complex related to the active site of [NiFe]-hydrogenases

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Chinese Chemical Letters 2020年第9期31卷 2483-2486页

作者： Dengmeng Song Xuyun Gao Bo li Jun li Xuzhuo Sun Chengbo li Jiale Zhao lin Chen Ning Wang Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry&Materials ScienceNorthwest UniversityXi'an 710069China College of Chemistry Chemical and Environmental EngineeringHenan University of TechnologyZhengzhou 450001China State Key Laboratory of Environment-Friendly Energy Material Southwest University of Science and TechnologyMianyang 621010China

Structural and functional biomimicking of the active site of [NiFe]-hydrogenases can provide helpful hints for designing bioinspired catalysts to replace the expensive noble metal catalysts for H2 generation and *** of dianion [Ni(phma)]2-[H4 phma=N,N’-1,2-phenylenebis(2-mercaptoacetamide)] with [NiCl2(dppp)](dppp=bis(diphenylphosphino)propane) yielded a dinickel product[Ni(phma)(μ-S,S’)Ni(dppp)](1) as the model complex relevant to the active site of [NiFe]-H2 *** structure of complex 1 has been characterized by single-crystal X-ray *** cyclic voltammetry and controlled potential electrolysis studies,complex 1 was found to be a moderate electrocatalyst for the H2-evoluting reaction using ClCH2COOH as the proton source.

关键词： Hydrogenase Electrocatalysis Hydrogen evolution Nickel complex Metallothiolate ligand

Functional limit theorem for moving average processes generated by dependent random variables

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Progress in Natural Science:Materials International 2006年第3期16卷 266-273页

作者： lin Zhengyan and li Degui (Department of Mathematics, Zhejiang University, Hangzhou 310028, China) Department of Mathematics Zhejiang University Hangzhou 310028 China

Let {Xt,t≥1} be a moving average process defined by , where {bj,j≥0} is a sequence of real num- bers and {ξt,-∞ 详细信息

Let {Xt,t≥1} be a moving average process defined by , where {bj,j≥0} is a sequence of real num- bers and {ξt,-∞linear process, we study asymptotics of (properly nor- malized). When {Xt,t≥1} is a long memory process, we establish a functional limit theorem. When {Xt,t≥1} is a linear process, we not only obtain the multi-dimensional weak convergence for {Xx,t≥1},but also weaken the moment condition on {ξt,-∞lications of our results.

关键词： functional limit theorem long memory process linear process moving average process φ-mixing.

Double-authentication-preventing signatures revisited:new definition and construction from chameleon hash

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Frontiers of Information Technology & Electronic Engineering 2019年第2期20卷 176-186页

作者： Fei li Wei GAO Gui-lin WANG Ke-fei CHEN Chun-ming TANG School of Mathematics and Statistics Ludong University Key Laboratory of Information Security Guangzhou University China-USA Computer Science Research Center Nanjing University of Information Science and Technology Shield Lab Singapore Research Center of Huawei Department of Mathematics Hangzhou Normal University

Double-authentication-preventing signature(DAPS) is a novel signature notion proposed at ESORICS2014. The double-authentication-preventing property means that any pair of signatures on two different messages with the same subject will result in an immediate collapse of the signature system. A few potential applications of DAPS have been discussed by its inventors, such as providing a kind of self-enforcement to discourage certificate authority(CA) from misbehaving in public key infrastructure and offering CA some cryptographic arguments to resist legal coercion. In this study, we focus on some fundamental issues on DAPS. We propose a new definition,which is slightly weakened but still reasonable and strong enough to capture the DAPS concept. We develop the new notion of invertible chameleon hash functions with key exposure. Then we propose a generic DAPS scheme, which is provably secure if the underlying invertible chameleon hash function with key exposure is secure. We instantiate this general construction to obtain the DAPS schemes respectively based on the well-known assumptions of integer factorization, Rivest-Shamir-Adleman(RSA), and computational Diffie-Hellman(CDH). They are more efficient than previous DAPS schemes. Furthermore, unlike previous constructions, the trusted setup condition is not needed by our DAPS schemes based on RSA and CDH.

关键词： Double-authentication-preventing signatures Chameleon hash function Digital signature Provable security Authority trust level