维普中文期刊产品整合服务
348篇 您的检索式:作者名="Queen"
    题名 作者 年代 出处 被引量
1Symmetric-key cryptosystem with DNA technology显示文摘DNA cryptography is a new field which has emerged with progress in the research of DNA computing. In our study, a symmetric-key cryptosystem was designed by applying a modern DNA biotechnology, microarray, into cryptographic technologies. This is referred to as DNA symmetric-key cryptosystem (DNASC). In DNASC, both encryption and decryption keys are formed by DNA probes, while its ciphertext is embedded in a specially designed DNA chip (microarray). The security of this system is mainly rooted in difficult biology processes and problems, rather than conventional computing technology, thus it is unaffected by changes from the attack of the coming quantum computer. The encryption process is a fabrication of a specially designed DNA chip and the decryption process is the DNA hybridization. In DNASC, billions of DNA probes are hybridized and identified at the same time, thus the decryption process is conducted in a massive, parallel way. The great potential in vast parallelism computation and the extraordinary information density of DNA are displayed in DNASC to some degree.LU MingXin1,2*, LAI XueJia3*, XIAO GuoZhen4,2 & QIN Lei5 1 Department of Information Management, Nanjing University, Nanjing 210093, China 2 State Key Lab of Information Security, Institute of Software of Chinese Academy of Science, Beijing 100049, China 3 Department of Computer Science & Engineer, Shanghai Jiao Tong University, Shanghai 200030, China 4 State Key Lab of ISN, Xidian University, Xi’an 710071, China 5 Cancer Research Institute, Queen’s University, Kingston, Ontario, K7L3N6, Canada 2007Science in China(Series F)2007,50,3:14
2Simulation of multiple scattering of seismic waves by spatially distributed inclusions显示文摘A 2D elastodynamic boundary element method (BEM) is used to solve multiple scattering of elastic waves. The method is based on the integral representation of an elastic wave-field by assuming a fictitious source distribution on the scattering objects or inclusions, i.e. a mathematical description of Huygens’ principle, and the fictitious source distribution can be found by matching appropriate boundary conditions at the boundary of the inclusions. Numerical studies show that in the presence of cracks, spatial and scale-length distributions are important and different spatial arrangements of the same scatters lead to profound differences in scattering characteristics, in particular the frequency contents of the transmitted wave-fields. The frequency characteristics, such as the frequency of peak attenuation , can be related to spatial size parameters of the model.刘恩儒 QUEEN John H 张中杰 陈东 2000Science China(Technological Sciences)2000,43,4:6
3On conformal measures for infinitely renormalizable quadratic polynomials显示文摘We study a conformal measure for an infinitely renormalizable quadratic polynomial. We prove that the conformal measure is ergodic if the polynomial is unbranched and has complex bounds. The main technique we use in the proof is the three-dimensional puzzle for an infinitely renormalizable quadratic polynomial.HUANG Zhiyong~1 JIANG Yunping~(2,3) & WANG Yuefei~3 1. School of Information,Renmin University of China,Beijing 100872,China 2. Department of Mathematics,Queens College,City University of New York,NY 11367,USA Department of Mathematics,Graduate School,City University of New York,New York,NY 10016,USA 3. Academy of Mathematics and Systems Science,Chinese Academy of Sciences,Beijing 100080,China 2005Science China Mathematics2005,48,10:4
4CRYSTALLISATION KINETICS AND PHASE TRANSFORMATION BEHAVIOUR OF ELECTROLESS NICKEL-PHOSPHORUS DEPOSIT WITH 6-9wt% PHOSPHORUS CONTENT显示文摘Crystallisation kinetic and phase transformation behaviour of the electroless nickel-phosphorus deposit with 6-9wt% phosphorus content were studied. The deposit was heated in the differential scanning calorimetry (DSC) apparatus to 300℃-800℃ at 20℃/min, followed by the X-ray diffraction (XRD) analysis. The sequence of crystallisation process was: mixture of amorphous and microcrystalline nickel phases → intermediate metastable, f. c. c. nickel and stable N13P phases → f. c. c. nickel and stable Ni3P phases. Preferred orientation of nickel {200} plane was developed after the heating processes. Activation energy of crystallisation process was determined from the DSC analyses at 5-50℃/min. Crystallisation temperatures were found increased with increasing heating rate.K.G. Keong, W. Sha and S. Malinov (School of Civil Engineering, The Queen’s University of Belfast, Belfast BT7 1NN, UK) 2001Acta Metallurgica Sinica(English Letters)2001,14,6:4
5Experience of donor right lobe hepatectomy in adult-to-adult live donor liver transplantation: clinical analysis of 89 cases显示文摘Objective: To review the experience of donor selec-tion and right lobe hepatectomy in adult-to-adult livedonor liver transplantation.Methods: From May 1996 to December 2001, 89 livedonor liver transplants using right lobe grafts wereperformed at Queen Mary Hospital, Hong Kong. Alldonors had received psychological counseling beforedonor operations. They were screened by laboratorytests including complete blood cell count, liver andrenal biochemistry, and viral serology studies. Com-puted tomography (CT), CT volumetry and hepaticarteriography were routinely performed. All donorsunderwent the operations using the method designedby us.Results: The median duration of the operations was8.8 hours. The median blood loss recorded 466 ml.The median intensive care unit and hospital stayswere 2 and 10 days, respectively. There was no do-nor mortality. Complications of donor operations in-cluded wound infection, urinary tract infection, bili-ary stricture, cholestasis, subphrenic collection,bowel obstruction and incision hernia, etc. All do-nors have recovered and returned to their previousoccupations.Conclusions: Live donation of right lobe grafts for a-dult-to-adult liver transplantation is safe, providedthat donor selection is strict and utmost care is exer-cised during the operation.Sheung-Tat Fan Chung-Mau Lo Chi-Leung Liu From the Centre for the Study of Liver Disease and Department of Surgery, University of Hong Kong Medical Centre, Queen Mary Hospital, Hong Kong, China 2002Hepatobiliary & Pancreatic Diseases International2002,1,2:3
6Simulating global soil-CO_2 flux and its response to climate change显示文摘It has been argued that increased soil respiration would become a major atmospheric source of CO\-2 in the event of global warming. The simple statistical models were developed based on a georeferenced database with 0 5°×0 5° longitude/latitude resolution to simulate global soil\|CO\-2 fluxes, to investigate climatic effects on these fluxes using sensitivity experiments, and to assess possible responses of soil\|CO\-2 fluxes to various climate change scenarios. The statistical models yield a value of 69 PgC/a of global soil\|CO\-2 fluxes for current condition. Sensitivity experiments confirm that the fluxes are responsive to changes in temperature, precipitation and actual evapotranspiration, but increases in temperature and actual evapotranspiration affect soil\|CO 2 fluxes more than increases in precipitation. Using climatic change projections from four global circulation models, each corresponding to an equilibrium doubling of CO 2, it can be found that the largest increases in soil\|CO 2 fluxes were associated with the boreal and tundra regions. The globally averaged soil\|CO 2 fluxes were estimated to increase by about 35% above current values, providing a positive feedback to the greenhouse effect.PENG Chang\|hui 1* , Michael J. Apps\+2 (1 Ontario Forest Research Institute, Ministry of Natural Resources, 1235 Queen Street East, Sault Ste. Marie, ON P6A 2E5,Canada. E\|mail: pengc@gov.on.ca 2 Morthern Forestry Center, Canadian Forest Serv 2000Journal of Environmental Sciences2000,12,3:2
7LABORATORY MEASUREMENTS IN SINE-GENERATED MEANDERING CHANNELS显示文摘The patterns (In flow plan) of rough turbulent steady flows in sine-generated meandering streams are investigated experimentally. The flow cross-section is rectangular, the flow width is uniform, the channel bed is flat; the plan shape is sine-generated. In contrast to previous works, where the computed flow patterns were of the same character, irrespective of the sinuosity of the channel, it is found, on the basis of present experiments, that every different Plan geometry of a meandering flow has its own flow picture. In the case of 'small' sinuosity, the flow convectively accelerates at the inner bank between the crossover-and apexsections; if, however, the sinuosity is 'large', the now convectively decelerates in the same region. The convergence-divergence areas (in flow Plan) of the present flows are in coincidence with the location of erosion-deposition zones in meandering streams, confirming that the convective behaviour of the vertically-averaged flow alone is sufficient to induce the bed and bank deformation.A. M. Ferreira da SILVA and M. S YALIN (1 Research Hydraulic Engineer, Hydraulics Laboratory, Waterways Experiment Station, U. S. Army Corps of Engineers, Vicksburg, Mississippi. 2 Emeritus Professor, Department of Civil Engineering, Queen’s University, K 1997International Journal of Sediment Research1997,12,1:2
8RATIONAL BASIS FOR SUSPENDED SEDIMENT MODELING显示文摘This paper presents a rational basis to model the transport of suspended sediment. The looseboundary condition for 3D models and the adjustment coefficients for both the depth-integrated 2D and laterally integrated 1D models are treated comprehensively. A combination of Dirichlet and Neumann conditions is proposed as the loose-boundary condition. The adjustment coefficient for 2D models is obtained on the basis of the proposed boundary condition and analytical solutions developed for some simple cases of non-equilibrium transport of sediment in uniform flows. The adjustment coefficient for 1D models for natural rivers is further obtained from lateral integration. Comparisons with analytical solutions and a considerable amount of laboratory and prototype data show that mathematical models developed along the proposed line of attack would well simulate the transport of suspended sediment in practical problems.Jianjun ZHOU, Biniiang LIN and Bingnan LIN Prof, Dept. of Hydraulic Eng., Tsinghua University, Beijing 100084, P.R. China Senior Lecturer, School of Eng., Cardiff University, Queen’s Buildings, P.O.Box 686, Cardiff, CF14 9EW, UK Dir. Emeritus, China Inst. of Water Resources and Hydropower Res. Formerly, Chief of Sedimentation Panel for TGP Chairman Emeritus of Advising Council, IRTCES, P.O. Box. 366, Beijing 100044, P.R. China 2003International Journal of Sediment Research2003,18,3:2
9Some Evidence for Host Specificity in Arbuscnlar Myc-orrhizas显示文摘SomeEvidenceforHostSpecificityinArbnscnlarMyc-orrhizasJ.B.ROGERS,P.CHRISTIE,A.S.LAIDLAWDepartmentofAppliedPlantScience,TheQue...J.B. ROGERS P. CHRISTIE and A. S. LAIDLAWDepartment of Applied Plant Science, The Queen’s University of Belfast, Newforge Lane, Belfast BT95PX(U. K.)Department of Agricnltural Chemistry, The Queen’s University of Belfast, Newforge Lane, Belfnst BT 1994Pedosphere1994,4,4:2
10G Protein-coupled cyclic AMP signaling in postmortem brain of subjects with mood disorders:effects of diagnosis,suicide,and treatment at the time of death显示文摘Dowlatshahi D Mac Queen GM Wang JF Reiach JS Young LT 1999J Neurochem1999,73,3:1
11Color display of the loca-lized spectrum显示文摘Theophanis S Queen J 2000Geophysics2000,65,4:1
12Course of illness,hippocampal function and hippocampal volume in major depression显示文摘Mac Queen G M Campbell S McEwen B S 2003PNAS2003,100,3:1
13Increased hippocampal BDNF immunoreactivity in subjects treated with antidepressant medication显示文摘Chen B Dowlatshahi D Mac Queen GM Wang JF Young LT 2001Biol Psychiatry2001,50,4:1
14Crane habitat evaluation using GIS and remote sensing显示文摘HERR A QUEEN L 1998Photogrammetfic Engineer and RemoteSensing1998,59,10:1
15Ectopic pregnancy:risk factors,diagnostic procedures and treatment显示文摘Mc Queen A 2011Nurs Stand2011,25,37:1
16Optimal control of a rigid body with dissimilar actuators 显示文摘QUEEN E M SILVERGERG L 1996Journal of Guidance Control and Dynamics1996,19,3:1
17A prospective,longitudinal study of percentage of time spent ill in patients with bipolar I or bipolar II disorders显示文摘Joffe RT Mac Queen GM Marriott M 2004Bipolar Disorders2004,6,1:1
18Unconventional,highly selective CO2adsorption in zeolite SSZ-13显示文摘Hudson M R Queen W L Mason J A 2012Journal of the American Chemical Society2012,134,4:1
19Giant hypopharyngeal atypical lipomatous tumor显示文摘Mc Queen C Montgomery E Dufour B 2010Adv Anat Pathol2010,17,1:1
20Polyphenols and aging 显示文摘Queen BL Tollefsboll TO 2010Curr Aging Sci2010,3,1:1
返回顶部 每页显示:
共18页 首页 上一页 第1页 下一页 末页 /18 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费