检索结果-南通市图书馆

Experimental Study on Influencing Factors of Motion Responses for Air-Floating Tetrapod Bucket Foundation

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

china Ocean Engineering 2022年第2期36卷 258-267页

作者： liu Xian-qing LE Cong-huan ZHAO Ming-jie DING Hong-yan zhang {2.-yang LV Nan LUO Sheng National Engineering Research Center for Inland Waterway Regulation Chongqing Jiaotong UniversityChongqing 400074China State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China department of Military Facilities Army Logistics University of PLAChongqing 401331China

Air floating transport is one of the key construction technologies of bucket *** influences of draft,water depth and bucket spacing on the motion response characteristics of tetrapod bucket foundation(TBF)during air-floating transportation were studied by models *** results showed that with the increase of draft,the natural periods of heave motion increased,while the maximum amplitudes of oscillating motion *** maximum amplitudes of heave motion decreased while pitch motion increased with the increasing of water depth;further,the period range of oscillating amplitude close to the maximum amplitude was expanded due to shallow water *** increasing bucket spacing,the maximum amplitudes of heave motion first increase and then decreased,whereas the maximum amplitudes of pitch motion ***,the favorable air-floating transportation performance can be achieved by choosing a larger bucket spacing under the condition of meeting the design requirements and reducing the draft under shallower water.

关键词： tetrapod bucket foundation response amplitude operator(RAO) draft water depth spacing air-floating

Cross Project Defect Prediction via Balanced Distribution Adaptation Based Transfer Learning

在线全文

学校读者我要写书评

暂无评论

Journal of Computer Science & technology 2019年第5期34卷 1039-1062页

作者： Zhou Xu Shuai Pang Tao zhang Xia-pu Luo Jin {2. Yu-Tian Tang Xiao Yu Lei Xue College of Computer Science and technology Harbin Engineering UniversityHarbin 150001China School of Computer Science Wuhan UniversityWuhan 430072China department of Computing The Hong Kong Polytechnic UniversityHong Kong 999077China Department of ComputingThe Hong Kong Polytechnic UniversityHong Kong 999077China Key Laboratory of Network Assessment technology Institute of Information EngineeringChinese Academy of Sciences Beijing 100190China Guangxi Key Laboratory of Trusted Software Guilin University of Electronic TechnologyGuilin 541004China department of Computer Science City University of Hong KongHong Kong 999077China

Defect prediction assists the rational allocation of testing resources by detecting the potentially defective software modules before releasing products. When a project has no historical labeled defect data, cross project defect prediction (CPDP) is an alternative technique for this scenario. CPDP utilizes labeled defect data of an external project to construct a classification model to predict the module labels of the current project. Transfer learning based CPDP methods are the current mainstream. In general, such methods aim to minimize the distribution differences between the data of the two projects. However, previous methods mainly focus on the marginal distribution difference but ignore the conditional distribution difference, which will lead to unsatisfactory performance. In this work, we use a novel balanced distribution adaptation (BDA) based transfer learning method to narrow this gap. BDA simultaneously considers the two kinds of distribution differences and adaptively assigns different weights to them. To evaluate the effectiveness of BDA for CPDP performance, we conduct experiments on 18 projects from four datasets using six indicators (i.e., F-measure, g-means, Balance, AUC, EARecall, and EAF-measure). Compared with 12.baseline methods, BDA achieves average improvements of 2..8%, 12.5%, 11.5%, 4.7%, 34.2., and 33.7% in terms of the six indicators respectively over four datasets.

关键词： cross-project defect prediction transfer learning balancing distribution effort-aware indicator

Sythesis, Characterization and Catalysis of [ η~5,η~1-C_5H_4-CHPh-PhO]TiCl_2

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

Chemical Research in Chinese Universities 2001年第1期17卷 115-116页

作者： WANG Jian hui MU Ying pu Wei ming zhang Yue tao YANG Guang di {2. Ju zheng department of Chemistry Jilin UniversityChangchun 130023P.R.China

The synthesis and structure of phenol groups containing ligand 2.[(cyclopentadienyl-phenyl)-methyl]phenol(CpH-PhCH-PhOH) were described. H Nuclear magnetic resonance (NMR) was used to show existence of ligand precursor in isomers of the group. Me3SiCp-PhCH-PhOSiMe3 was formed via treatment of 2.mol Me3SiCl with the dilithium salt of the ligand. New Ti compound [η+5, η1-C5H4-PhCH-PhO]TiCl2.was formed by reacting with titanium chloride.

关键词： Metallocene Catalyst Cyclopentadienyl group

Gold nanoparticles/carbon nanotubes composite microspheres for catalytic reduction of 4-nitrophenol

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2016年第6期27卷 843-846页

作者： Sheng liu Xiao-Lin Zhou Meng-Meng zhang Xuan Lu Yu-Jun Qin {2. zhang Zhi-Xin Guo department of Chemistry Renmin University of China

The layer-by-layer assembly of polyethyleneimine and carbon nanotubes is carried out through the electrostatic interactions on colloidal polystyrene templates. The successful spherical growth of polyethyleneimine/carbon nanotube multilayers could be investigated by SEM. The subsequent in situ preparation and deposition of gold nanoparticles on the core–shell composites could yield novel microsphere complexes, which are characterized by SEM, TEM, EDX and XRD. The functional hierarchical microspheres with gold nanoparticles exhibit good catalytic activity in the reaction of reducing 4-nitrophenol to 4-aminophenol.

关键词： Carbon nanotubes Gold nanoparticles Microsphere Catalytic activity

Impacts of Land-Use Data on the Simulation of Surface Air Temperature in Northwest china

在线全文

学校读者我要写书评

暂无评论

Journal of Meteorological Research 2018年第6期32卷 896-908页

作者： Yaohui LI Cailing ZHAO Tiejun zhang Wei WANG Haixia DUAN Yuanpu {2. Yulong REN Zhaoxia pu Key Laboratory for Arid Climate Change and Disaster Reduction of Gansu Province Lanzhou Institute of Arid Meteorology/Northwestern Regional Center of Numerical Weather Prediction Key Open Laboratory for Arid Climate Change and Disaster Reduction of the China Meteorological Administration department of Atmospheric Sciences University of Utah

This study examines the impacts of land-use data on the simulation of surface air temperature in Northwest china by the Weather Research and Forecasting(WRF) model. International Geosphere–Biosphere Program(IGBP) landuse data with 500-m spatial resolution are generated from Moderate Resolution Imaging Spectroradiometer(MODIS)satellite products. These data are used to replace the default U.S. Geological Survey(USGS) land-use data in the WRF model. Based on the data recorded by national basic meteorological observing stations in Northwest china, results are compared and evaluated. It is found that replacing the default USGS land-use data in the WRF model with the IGBP data improves the ability of the model to simulate surface air temperature in Northwest china in July and December 2.15. Errors in the simulated daytime surface air temperature are reduced, while the results vary between seasons. There is some variation in the degree and range of impacts of land-use data on surface air temperature among seasons. Using the IGBP data, the simulated daytime surface air temperature in July 2.15 improves at a relatively small number of stations, but to a relatively large degree; whereas the simulation of daytime surface air temperature in December 2.15 improves at almost all stations, but only to a relatively small degree(within 1°C). Mitigation of daytime surface air temperature overestimation in July 2.15 is influenced mainly by the change in ground heat flux. The modification of underestimated temperature comes mainly from the improvement of simulated net radiation in December 2.15.

关键词： surface air temperature land-use data numerical simulation Northwest china

Electronic Correlation and Pseudogap-Like Behavior of High-Temperature Superconductor La_(3)Ni_(2.O_(7)

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2024年第8期41卷 82-93页

作者： Yidian Li Xian Du Yantao Cao Cuiying Pei Mingxin zhang Wenxuan Zhao Kaiyi Zhai Runzhe Xu Zhongkai liu Zhiwei Li Jinkui Zhao Gang Li Yanpeng Qi Hanjie Guo Yulin Chen Lexian Yang State Key Laboratory of Low Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China Key Lab for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou UniversityLanzhou 730000China Songshan Lake Materials Laboratory Dongguan 523808China School of Physical Science and technology ShanghaiTech UniversityShanghai 201210China ShanghaiTech Laboratory for Topological Physics Shanghai 200031China Shanghai Key Laboratory of High-Resolution Electron Microscopy ShanghaiTech UniversityShanghai 201210China department of Physics Clarendon LaboratoryUniversity of OxfordParks RoadOxford OX13PUUK Frontier Science Center for Quantum Information Beijing 100084China

High-temperature superconductivity(HTSC)remains one of the most challenging and fascinating mysteries in condensed matter ***,superconductivity with transition temperature exceeding liquid-nitrogen temperature is discovered in La_(3)Ni_(2.O_(7) at high pressure,which provides a new platform to explore the unconventional *** this work,using high-resolution angle-resolved photoemission spectroscopy and ab initio calculation,we systematically investigate the electronic structures of La_(3)Ni_(2.O_(7) at ambient *** experiments are in nice agreement with ab initio calculations after considering an orbital-dependent band renormalization *** strong electron correlation effect pushes a flat band of d_(z^(2.)𝑧2.orbital component below the Fermi level(E_(F)),which is predicted to locate right at E_(F) under high ***,the d_(x^(2.−y^(2.) band shows pseudogap-like behavior with suppressed spectral weight and diminished quasiparticle peak near E_(F).Our findings provide important insights into the electronic structure of La_(3)Ni_(2.O_(7),which will shed light on understanding of the unconventional superconductivity in nickelates.

关键词： effect superconductivity orbital

Scanning reproducible brain-wide associations:sample size is all you need?

在线全文

学校读者我要写书评

暂无评论

Psychoradiology 2022年第3期2卷 67-68页

作者： Xiang-Zhen Kong Chenghui zhang Yinuo liu Yi {2. department of Psychology and Behavioral Sciences Zhejiang UniversityHangzhou 310028China department of Psychiatry of Sir Run Run Shaw Hospital Zhejiang University School of MedicineHangzhou 310016China department of Neuroscience Max Planck Institute for Empirical AestheticsFrankfurt am Main 60322Germany

Back to 1874,John Hughlings Jackson,a pioneer in neurology who had profound knowledge about the structure of the brain,posited that“difference of[brain]structure of necessity implies difference in function”.Since then,understanding the relationship between the brain structure and function in humans has become an important endeavor in neuroscience research.

关键词： size function implies

健脾消萎汤联合胶体果胶铋胶囊治疗对慢性萎缩性胃炎患者胃泌素17、胃蛋白酶原、炎性因子水平的影响

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

现代中医药 2024年第1期44卷 74-78页

作者：陈兴慧谢睿刘瑶张靖琨李璞冀花汉中市中医医院脾胃病科陕西汉中723100 商洛市中心医院中西医结合科陕西商洛726000

目的观察健脾消萎汤联合胶体果胶铋胶囊治疗慢性萎缩性胃炎对患者胃泌素-17(gastrin 17,G-17)、胃蛋白酶原(pepsinogen,PG)、炎性因子水平的影响。方法选取2.19年6月—2.2.年6月前来我院治疗的慢性萎缩性胃炎患者80例,随机分为对照组(40... 详细信息

目的观察健脾消萎汤联合胶体果胶铋胶囊治疗慢性萎缩性胃炎对患者胃泌素-17(gastrin 17,G-17)、胃蛋白酶原(pepsinogen,PG)、炎性因子水平的影响。方法选取2.19年6月—2.2.年6月前来我院治疗的慢性萎缩性胃炎患者80例,随机分为对照组(40例,胶体果胶铋胶囊)、治疗组(40例,胶体果胶铋胶囊+健脾消萎汤),均给予基础治疗,评估疗效,测量血清炎性因子及PG、GAS-17水平。结果治疗组总有效率显著高于对照组(P2.IL-6水平显著低于对照组(P17水平显著高于对照组,PGⅡ水平显著低于对照组(P17水平,缓解患者临床症状,整体疗效确切。

关键词：慢性萎缩性胃炎健脾消萎汤胶体果胶秘胶囊胃泌素-17 胃蛋白酶原

Low phase noise and quasi-tunable millimeter-wave generator using a passively In As/InP mode-locked quantum dot laser

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2020年第6期16卷 441-445页

作者： liu Li liu Yang-guang {2. Xiao-min liu Bang-quan {2. Xiu-pu College of Digital technology and Engineering Ningbo University of Finance&EconomicsNingbo 315175China department of Electrical and Computer Engineering Concordia UniversityMontreal QC H3G 1M8Canada

A low phase noise millimeter-wave(MMW) signal generator is proposed and experimentally demonstrated with a C-band passively Fabry-Pérot(F-P) quantum dot mode-locked laser. A novel method is proposed to generate low phase noise MMW signal, which is simply based on a commercial off-the-shelf dual-driven Li Nb O3 Mach-Zehnder modulator and a passively F-P quantum dot mode-locked laser. MMW signal with the frequency of 30 GHz, 45 GHz and 90 GHz respectively is obtained experimentally. Single-sideband phase noise of the 30 GHz and 45 GHz MMW signal is-112.d Bc/Hz and-106 d Bc/Hz at an offset of 1 k Hz, respectively. The linewidth of the 30 GHz and 45 GHz MMW signal is about from 2.5 Hz and 2.9 Hz. This is considered a very simple MMW generator with a quasi-tunable broadband and ultra-low phase noise.

关键词： MZM Low phase noise and quasi-tunable millimeter-wave generator using a passively In As/InP mode-locked quantum dot laser InP