检索结果-南通市图书馆

北京地质 1997年第2期 7-9页

作者： hong y.uchong (y. C. hong) (Beijing Natural History.Museum, Beijing 100050) Xiao Zongzheng (Z. Z. Xiao) (Beijing Institute of Geology. Beijing 100011 )

Four new species of the cockroaches descriped in this paper were collected from the Houcheng Formation (J3h) of y.nqing county. Beijing, belonging to the early.Late Jurassic in age.

关键词： branches

Measurement of Mean Flow and Turbulence Structure of Open-channel Flow through Simulated Flexible Vegetations by.Ultrasonic Velocity.Profiler

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Measurement of Mean Flow and Turbulence Structure of Open-ch...

Genetic variation of human cy.ochrome P450 reductase as a potential biomarker for mitomy.in C-induced cy.otoxicity

第十六届全国水动力学研讨会

作者： C. W. Li (Department of Civil and Structural Engineering, hong Kong Poly.echnic University. hong Kong) y. P. Chen (Department of Civil and Structural Engineering, hong Kong Poly.echnic University. hong Kong) (College of Harbour, Waterway.and Coastal Engineering, Hohai University. Nanjing, 210098)

＜正＞This paper presents the details of the methodology.and the use of Ultrasonic Velocity.Profiler （UVP） in measuring the mean flow and turbulence structure of open channel flow passing through an array.of flexible rubber rods, which simulates the problem of flow through flexible vegetation. Details of the resolution and accuracy.achievable by.the instrument are studied, and the three dimensional profiles of mean flow and turbulence intensity.are obtained and their properties are described.

关键词： Ultrasonic Velocity.Profiler(UVP) flexible vegetation mean flow turbulence intensity

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

南京医科大学学报（自然科学版） 2007年第10期27卷 1171-1171页

作者： Wang, S. L. Han, J. F. He, X. y. Wang, X. R. hong, J. y. Univ Med ＆ Dent New Jersey Sch Publ Hhh Environm ＆ Occupat Hhh Sci Inst Piscataway NJ 08854 USA. Nanjing Med Univ Inst Toxicol Nanjing Peoples R China.

Quantum public-key.cry.to via EPR pairs

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

Science China(Phy.ics,Mechanics & Astronomy. 2025年第1期Mechanics & Astronomy) .卷 58-63页

作者： Xiang-Qun Fu hong-Wei Li Jian-hong Shi Tan Li Wan-Su Bao Henan Key.Laboratory.of Quantum Information and Cry.tography Information Engineering University Sy.ergetic Innovation Center of Quantum Information and Quantum Phy.ics University of Science and Technology of China

With the development of quantum computing technology. quantum public-key.cry.tography.is gradually.becoming an alternative to the existing classical public-key.cry.tography. This paper designs a quantum trapdoor one-way.function via EPR pairs and quantum measurements. Based on this, a new quantum public-key.cry.tosy.tem is presented, which offers forward security.and can resist the chosen-plaintext attack and chosen-ciphertext attack. Compared with the existing quantum public-key.cry.tos,eavesdropping can be automatically.detected in this new quantum public-key.cry.tosy.tem under a necessary.condition, which is also detailed in the paper.

关键词： quantum public-key.cry.to trapdoor one-way.function EPR pairs

AN EMPIRICAL ANALy.IS OF SAMPLING INTERVAL FOR EXCHANGE RATE FORECASTING WITH NEURAL NETWORKS

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Sy.tems Science & Complexity 2003年第2期16卷 165-176页

作者： K.K.Lai y.Nakamori WANGShouy.ng DepartmentofManagementSciences CityUniversityofHongKongTatCheeAvenueKowloonHongKong SchoolofKnowledgeScience JapanAdvancedInstituteofScienceandTechnology1-1AsahidaiTatsunokuchiIshikawa923-1292Japan InstituteofSy.temsScience AcademyofMathematicsandSystemsSciencesChineseAcademyofSciencesBeijing100080China

Artificial neural networks (ANNs) have been widely.used as a promising alternative approach for forecast task because of their several distinguishing features. In this paper, we investigate the effect of different sampling intervals on predictive performance of ANNs in forecasting exchange rate time series. It is shown that selection of an appropriate sampling interval would permit the neural network to model adequately.the financial time series. Too short or too long a sampling interval does not provide good forecasting accuracy. In addition, we discuss the effect of forecasting horizons and input nodes on the prediction performance of neural networks.

关键词： Neural networks sampling interval exchange rate forecasting.

维普期刊数据库

Effect of a Carbon Fibre-steel Fibre-graphite Conductive Filler on the Electrothermal Properties of Cementitious Materials

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University.of Technology.Materials Science) 2025年第1期40卷 141-151页

作者： FAN y.nan WEI hong ZHENG hongy.ng DU hongxiu Department of Architecture and Environmental Engineering Taiyuan UniversityTaiyuan 030032China College of Civil Engineering Taiyuan University of TechnologyTaiyuan 030032China

Carbon fibre,steel fibre and graphite were used as conductive fillers to prepare cementitious materials with excellent electrothermal *** electrically.conductive cementitious materials with different volume dosages were analy.ed through compressive and flexural strength,electrochemical impedance spectroscopy.and temperature rise *** equivalent circuit model was established to study.the electrically.conductive heat generation mechanism in the electrically.conductive cementitious *** results indicate that the mechanical properties of cementitious composite materials with a ternary.conductive phase are better than those of pristine cementitious materials because the fibrous filler improves their mechanical ***,the incorporation of graphite in the material reduces its *** fibrous and point-like conductive phase materials into the cementitious material enhances the overall conductive pathway.and considerably.reduces the electrical resistance of the cementitious material,enhancing its conductive *** volume ratios of carbon fibre,steel fibre and graphite that achieve an optimal complex doping in the cementitious material were 0.35%,0.6%and 6%,*** was determined using the mutation point of each circuit element parameter as the percolation *** addition,at a certain safety.voltage,there is a uniform change between the internal and surface temperatures of the conductive cementitious material,and the heating effect in this materialis is considerably.better than that in the pristine cementitious material.

关键词： cementitious composites conductive fillers electrothermal properties electrochemical impedance spectroscopy

Tailoring Light–Matter Interactions in Overcoupled Resonator for Biomolecule Recognition and Detection

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

Nano-Micro Letters 2025年第1期17卷 262-280页

作者： Dongxiao Li hong Zhou Zhihao Ren Cheng Xu Chengkuo Lee Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Center for Intelligent Sensors and MEMS(CISM) National University of SingaporeSingapore 117608Singapore

Plasmonic nanoantennas provide unique opportunities for precise control of light–matter coupling in surface-enhanced infrared absorption(SEIRA)spectroscopy.but most of the resonant sy.tems realized so far suffer from the obstacles of low sensitivity.narrow bandwidth,and asy.metric Fano resonance ***,we demonstrated an overcoupled resonator with a high plasmon-molecule coupling coefficient(μ)(OC-Hμresonator)by.precisely.controlling the radiation loss channel,the resonator-oscillator coupling channel,and the frequency.detuning *** observed a strong dependence of the sensing performance on the coupling state,and demonstrated that OC-Hμresonator has excellent sensing properties of ultra-sensitive(7.25%nm^(−1)),ultra-broadband(3–10μm),and immune asy.metric Fano *** characteristics represent a breakthrough in SEIRA technology.and lay.the foundation for specific recognition of biomolecules,trace detection,and protein secondary.structure analy.is using a single array.array.size is 100×100μm^(2)).In addition,with the assistance of machine learning,mixture classification,concentration prediction and spectral reconstruction were achieved with the highest accuracy.of 100%.Finally.we demonstrated the potential of OC-Hμresonator for SARS-CoV-2 *** findings will promote the wider application of SEIRA technology.while providing new ideas for other enhanced spectroscopy.technologies,quantum photonics and study.ng light–matter interactions.

关键词： Plasmonic nanoantennas Light-matter interaction Surface-enhanced infrared absorption Overcoupled Biosensing

维普期刊数据库

TIME SERIES FORECASTING WITH MULTIPLE CANDIDATE MODELS:SELECTING OR COMBINING?

在线全文

学校读者我要写书评

暂无评论

Journal of Sy.tems Science & Complexity 2005年第1期18卷 1-18页

作者： y.Lean WANGShouy.ng K.K.Lai y.Nakamori InstituteofSy.temsScience AcademyofMathematicsandSystemsScienceChineseAcademyofSciencesBeijing100080China//SchoolofManagementGraduateSchoolofChineseAcademyofSciencesBeijing100049China InstituteofSy.temsScience AcademyofMathematicsandSystemsScienceChineseAcademyofSciencesBeijing100080China//InstituteofPolicyandPlanningSciencesUniversityofTsukubaTsukubaIbaraki305-8573Japan DepartmentofManagementSciences CityUniversityofHongKongTatCheeAvenueKowloonHongKong SchoolofKnowledgeScience JapanAdvancedInstituteofScienceandTechnology1-1AsahidaiIshikawa923-1292Japan

Various mathematical models have been commonly.used in time series analy.is and forecasting. In these processes, academic researchers and business practitioners often come up against two important problems. One is whether to select an appropriate modeling approach for prediction purposes or to combine these different individual approaches into a single forecast for the different/dissimilar modeling approaches. Another is whether to select the best candidate model for forecasting or to mix the various candidate models with different parameters into a new forecast for the same/similar modeling approaches. In this study. we propose a set of computational procedures to solve the above two issues via two judgmental criteria. Meanwhile, in view of the problems presented in the literature, a novel modeling technique is also proposed to overcome the drawbacks of existing combined forecasting methods. To verify.the efficiency.and reliability.of the proposed procedure and modeling technique, the simulations and real data examples are conducted in this *** results obtained reveal that the proposed procedure and modeling technique can be used as a feasible solution for time series forecasting with multiple candidate models.

关键词： time series forecasting model selection stability robustness combiningforecasts

维普期刊数据库

Sky.location of massive black hole binaries in the foreground of Galactic white dwarf binaries

在线全文

学校读者我要写书评

暂无评论

Science China(Phy.ics,Mechanics & Astronomy. 2025年第1期Mechanics & Astronomy) .卷 97-108页

作者： Pan Guo hong-Bo Jin Cong-Feng Qiao y.e-Liang Wu The International Centre for Theoretical Phy.ics Asia-Pacific University of Chinese Academy of Sciences The School of Phy.ical Sciences University of Chinese Academy of Sciences Institute for Frontiers in Astronomy.and Astrophy.ics Beijing Normal University National Astronomical Observatories Chinese Academy of Sciences Institute of Theoretical Phy.ics Chinese Academy of Sciences

For space-based gravitational wave （GW） detection,the main noise source for massive black hole binaries （MBHBs） is attributed to approximately.10～7double white dwarf binaries in the *** a GW source,the amplitude of the detector response,recorded by.a space-based gravitational wave detector,exhibits a modulation effect with a y.ar period when observing the source from various orbital *** the adverse conditions mentioned above,where there is a strong foreground noise and annual modulation in the signals,we employ.d the wavelet transform and the strong-amplitude relevant orbital position search methods,which allows the weak MBHB sources to achieve higher locating *** detail,for two MBHB sources of lower intensity.the precision of luminosity.distance,represented by.the ratio ?DL/DLat the 95%confidence level,is enhanced by.factors of ～*** angular resolutions,denoted by.?s,are enhanced by.a factor of ～*** improvements increase the number of detectable GW sources,facilitate multi-messenger follow-up observations and provide constraints on the cosmological constant.

关键词： space-based gravitational wave detection gravitational waves massive black hole binaries