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World Journal of Psychiatry 2018年第1期8卷 20-26页

作者： Basant k Puri Mary Egan Fintan Wallis Philip Jakeman Department of Medicine Hammersmith HospitalImperial College London Department of Radiology University Hospital Limerick Centre for Interventions in Infection Inflammation and Immunity University of Limerick

AIM To investigate the repeatability of proton magnetic resonance spectroscopy in the in vivo measurement of human cerebral levels of choline-containing compounds(Cho).METHODS Two consecutive scans were carried out in six healthy resting subjects at a magnetic field strength of 1.5 T. On each occasion, neurospectroscopy data were collected from 64 voxels using the same 2 D chemical shift imaging(CSI) sequence. The data were analyzed in the same way, using the same software, to obtain the values for each voxel of the ratio of Cho to creatine. The Wilcoxon related-samples signed-rank test, coefficient of variation(CV), repeatability coefficient(RC), and intraclass correlation coefficient(ICC) were used to assess the repeatability. RESULTS The CV ranged from 2.75% to 33.99%, while the minimum RC was 5.68%. There was excellent reproducibility, as judged by significant ICC values, in 26 voxels. Just three voxels showed significant differences according to the Wilcoxon related-samples signed-rank test. CONCLUSION It is therefore concluded that when CSI multivoxel proton neurospectroscopy is used to measure cerebral choline-containing compounds at 1.5 T, the reproducibility is highly acceptable.

关键词： Cerebral metabolites Chemical shift imaging Choline Neurospectroscopy Neuropsychiatric disorders

Lattice expansion and smaller CuO_(x)CeO_(2-δ)particles formation by magnesium interaction for low temperature CO oxidation

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Journal of Rare Earths 2021年第4期39卷 434-439页

作者： J.M.Waikar R.k.More N.R.Lavande P.M.More Department of Chemistry Institute of Chemical TechnologyMatungaMumbai400019India

A series of magnesia doped CuOxCeO_(2-δ)catalysts were prepared by co-precipitation followed by impregnation method and investigated for CO *** manuscript is devoted to explaining the role of MgO for the formation of active species on the CuOxCeO_(2-δ)*** improvement in catalytic activity is ascribed to the formation of various active species due to the interaction of magnesia with CuOxCeO_(2-δ).The catalysts were characterized by PXRD,N_(2)adsorption,H_(2)-TPR,XPS,SEM,EDS and HRTEM *** Mg doped catalyst shows lattice expansion of ceria due to the formation of smaller Ce^(3+)species with oxygen *** Mg-O bond also takes part in CO activation and oxidation,which results in the increase of CO *** Mg doped CuOxCeO_(2-δ)catalyst shows improvement in low temperature activity compared with the CuOxCeO_(2-δ).

关键词： Adsorbed oxygen Lattice expansion Low temperature oxidation Ce^(3+) Cu^(+) Rare earths

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冲击波在铝靶中传播的数值模拟研究

物理学报 2001年第4期50卷 741-747页

作者：王薇张杰 V.k.SENECHA 中国科学院物理研究所光物理开放实验室首都师范大学物理系北京100037

利用一维辐射流体力学数值模拟程序对激光驱动的冲击波在平面铝靶中传播的实验结果进行了模拟研究 .分析了空间单元层的厚度对模拟结果的影响 ,给出了最佳单元层厚度 .通过将数值模拟与实验结果相比较给出了实验中两种激光光强的实际的... 详细信息

利用一维辐射流体力学数值模拟程序对激光驱动的冲击波在平面铝靶中传播的实验结果进行了模拟研究 .分析了空间单元层的厚度对模拟结果的影响 ,给出了最佳单元层厚度 .通过将数值模拟与实验结果相比较给出了实验中两种激光光强的实际的吸收系数 .结果显示 ,波长为 1.0 5 3μm ,强度分别为 0 .81× 10 14 和 1.6 5× 10 14 W/cm2 的激光驱动的冲击波在铝靶中传播速度分别为 16 .5 2 ,18.5 6 μm/ns,冲击波的峰值压力分别为 0 .386和 0 .5 37TPa 。

关键词：冲击波辐射流体力学激光等离子体数值模拟传播

Productivity of coalbed methane wells in southern of Qinshui Basin

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Mining Science and Technology 2010年第5期20卷 765-769,777页

作者： ZOU Mingjun WEI Chongtao PAN Haiyang SESAY k Santigie CAO Jia School of Resources and Geoscience China University of Mining & Technology Xuzhou 221116 China key Laboratory of CBM Resource and Reservoir-Generating Process Ministry of Education Xuzhou 221008 China

Based on regional CBM geological characteristics and drainage data of three typical Coalbed Methane(CBM) wells in the southern Qinshui Basin,history matching,productivity prediction and factor analysis of gas production control are conducted by using COMET3 reservoir modeling *** results show that in the next 20 years,the cumulative and average daily gas production of the QN01 well are expected to be 800×104 m3 and 1141.1 m3/d,for the QN02 well 878×104 m3 and 1202.7 m3/d and 97.5×104 m3 and 133.55 m3/d for the QN03 *** content and reservoir pressure are the key factors controlling gas production in the area;coal thickness,permeability and porosity are less important;the Langmuir volume,Langmuir pressure and adsorption time have relatively small *** the process of CBM recovery,the material source and driving force are the key features affecting gas productivity,while the permeation process is relatively important and the desorption process has some impact on gas recovery.

关键词： reservoir modeling history matching productivity prediction COMET3

Robotic resection for posterosuperior liver lesions: is it really superior to laparoscopic resection?

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Hepatobiliary Surgery and Nutrition 2019年第3期8卷 264-266页

作者： Andrew k.Y.Fung kit-Fai Lee Department of Surgery Prince of Wales HospitalThe Chinese University of Hong KongHong KongChina

Recovery after traditional open liver resection is greatly hindered by a big upper abdominal *** is especially true when the scale of parenchymal liver resection is relatively small,such as wedge resection or left lateral *** such scenarios,the access trauma outweighs the surgical *** the other hand,when the surgical trauma is large,such as major hepatectomy or extended liver resection,the surgical trauma rather than the access trauma determines the postoperative ***,minimal access surgery or minimally invasive surgery has come up as a fantastic way to minimize the access trauma and help to speed up recovery and shorten hospital stay(1).

关键词： trauma liver lesions

Hard carbon derived from rice husk as low cost negative electrodes in Na-ion batteries

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Journal of Energy Chemistry 2019年第2期28卷 17-22页

作者： Maria k.Rybarczyk Yunming Li Mo Qiao Yong-Sheng Hu Maria-Magdalena Titirici Marek Lieder Gdansk University of Technology Chemical Faculty key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesNational Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of Sciences Queen Mary University London School of Materials Science & Engineering

Here,we report the synthesis of hard carbon materials(RH) made from natural rice husk through a single pyrolysis process and their application as an anode in sodium-ion *** studies show that the electrochemical properties of RHs are affected by the treatment temperatures,which determine the materials morphology,in particular,their degree of graphitization and extent of continuous channels(nanovoids).The latter are accessible to sodium ions and significantly contribute to charge storage capacity of the produced *** RHs obtained at 1600 °C deliver the highest reversible capacity of276 mAh g^(-1) mainly due to insertion of sodium ions into the *** work deepens the basic understanding of the influence of the carbonization temperature on the sodium storage mechanism.

关键词： Nanovoids in rice husk Sustainable energy storage Na-ion batteries

Macrocyclic-ligand Induced Synthesis of Aryl Ethynides with Divergent Silver（I） Clusters

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Chinese Journal of Chemistry 2017年第12期35卷 1824-1828页

作者： Guangmian Ji Siqi Zhang Sam C. k. Hau Liang Zhao The key Laboratory ofBioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education) Department of Chemistry Tsinghua University Beijing 100084 China Department of Chemistry Hong Kong Baptist University Kowloon Hong Kong SAR China

Two structurally characterized metal-cluster-centered supramolecular architectures named [Ag8（1,2-（C= C）2-C6H4）（Py[6]）（CF3CO2）6]·2.5MeOH （1） and [Ag12（1,2,4,5-（C=C）aC6H2）（Py[6]）2（CF3SO3）s]·4MeOH·3H2O （2） are synthesized through the interaction with a bowl-shaped macrocyclic ligand PyI61. Particularly, two dissimilar silver（I） clusters are resulted in 2 within the structure under the influence of the macrocyclic ligand Py[6]. Such dissimilarity of the silver（1） cluster is also reflected on the structural and photophysical differences between 1 and 2.

关键词： macrocycle silver ethynide silver clusters dissimilarity supramolecular architecture

Torsional wave frequency in heterogeneous earth crust lying over dry sandy semi-infinite substratum

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Applied Mathematics and Mechanics(English Edition) 2019年第10期40卷 1399-1412页

作者： S.k.VISHWAkARMA R.kAUR T.R.PANIGRAHI Department of Mathematics Birla Institute of Technology and SciencePilani Hyderabad Campus

The present study is carried out to investigate the transference of torsional surface waves in a heterogeneous anisotropic crust lying over a dry sandy half-space. The rigidities and densities as well as the initial stress are assumed varying as a function of depth in both the media. These variations are the product of the polynomial function of depth in degree n (n ∈ R) and the exponential function of depth. Following the theory of elastic waves, the mathematical model is established. Separation of variables is used to obtain the displacement in the layer and the half-space. Intrinsic boundary conditions are imposed to derive the dispersion equation. The inhomogeneity parameters associated with the rigidity, the density, and the initial stress of the medium are found to have substantial influence on the phase velocity of the torsional surface wave. The graphical presentations are drawn to exhibit the findings. The results thus obtained are significant for the investigation and characterization of torsional surface wave in the heterogeneous anisotropic layer.

关键词： hypergeometric function Laguerre function torsional wave inhomogeneity gravity initial stress sandy medium

Energy Consumption and Economic Growth Nexus in Bangladesh

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Journal of Systems Science and Information 2019年第6期10卷 497-509页

作者： Swati Anindita SARkER Shouyang WANG k M Mehedi ADNAN School of Economics and Management University of Chinese Academy of SciencesBeijing 100190 Department of Agricultural Economics EXIM Bank Agricultural UniversityBangladeshChapainawabganj 6300Bangladesh College of Economics and Management Huazhong Agricultural UniversityWuhan 430070China Department of Agricultural Finance and Banking Sylhet Agricultural UniversitySylhet 3100Bangladesh

The empirical investigation that examines the dynamics including the interaction between consumption of energy and economic progress has long been ***,the interaction of these two in developing countries in general and Bangladesh,in particular,is a less explored ***,with this notion,this study examined the causal relationship among economic growth and energy consumption in *** this purpose,the study used energy consumption,gross domestic product(GDP),labor force,and capital data from 1981 to 2017 from different sources and data is analyzed by augmented Dickey-Fuller(ADF)unit root test,Johansen co-integration test and Granger test of *** determine that energy consumption and economic growth have long term bi-directional *** econometric model is estimated using generalized least squares(GLS)*** is concluded that,consumption of energy and economic growth positively correlated and economic development highly depend on energy consumption in Bangladesh.

关键词： energy consumption economic growth co-integration test Granger causality test GLS model Bangladesh

Relay-assisted wireless energy harvesting for multihop clustered IoT network

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Intelligent and Converged Networks 2023年第3期4卷 206-224页

作者： B.Pavani k.Venkata Subbareddy L.Nirmala Devi the Department of Electronics and Communication Engineering University College of EngineeringOsmania UniversityHyderabad 500007India

In large-scale networks such as the Internet of Things(IoT),devices seek multihop communication for longdistance communications,which considerably impacts their power ***,this study proposes an energy harvesting-enabled,relay-based communication in multihop clustered IoT networks in a bid to conserve the battery power in multihop IoT ***,this study proposes an efficient,hierarchical clustering mechanism in which entire IoT devices are clustered into two types:the closest cluster(CC)and remote clusters(RCs).Additionally,Euclidean distance is employed for the CC and fuzzy c-means for the ***,for cluster head(CH)selection,this study models a fitness function based on two metrics,namely residual energy and distance(device-to-device distance and device-to-sink distance).After CH selection,the entire clustered network is partitioned into several layers,after which a relay selection mechanism is *** every CH of the upper layer,we assign a few lower-layer CHs to function as *** relay selection mechanism is applied only for the devices in the RCs,while for devices in the CC,the CH functions as a ***,several simulation experiments are conducted to validate the proposed method’s *** results show the method’s superiority in terms of energy efficiency and optimal number of relays in comparison with the state-of-the-art methods.

关键词： Internet of Things(IoT) energy management clustering cluster head selection relay selection