检索结果-南通市图书馆

Lake water storage change estimation and its linkage with terrestrial water storage change in the northeastern Tibetan Plateau

引用

Journal of Mountain Science 2021年第7期18卷 1737-1747页

作者： LI Ya-wei WANG Yu-zhe XU min KANG Shi-chang Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100039China State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China CAS Centre for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China

Tibetan Plateau(TP) lakes are important water resources,which are experiencing quick expansion in recent *** researches mainly focus on analyzing the relationship between terrestrial water storage(TWS) change and lake water storage(LWS) change in the total inner TP,it is still lack of researches about the spatial difference and the characteristic of sub-region in the inner *** this study,we estimated the area change of 34 lakes by using Landsat images in the northeastern TP during 1976–2013,and LWS change by using the Shuttle Radar Topography Mission(SRTM).The results suggested that LWS had shrunk from 1976 to 1994,and then expanded quickly until *** had a serious decrease by 13.6 Gt during 1976–1994,and then it increased quickly by 35.4 Gt during 1994–*** estimated TWS change,soil moisture change,and permafrost degradation based on the satellite data and related models during 2003–*** results indicated that their changing rates were 1.86 Gt/y,0.22 Gt/y,and –0.19 Gt/y,*** also calculated the change of groundwater based on the mass balance with a decreasing trend of –0.054 Gt/*** results suggested that the cause of TWS change was the increase of *** analyzed the cause of lake change according to water balance,and found that the primary cause of lake expansion was the increasing precipitation(80.7%),followed by glacier meltwater(10.3%) and permafrost degradation(9%).The spatial difference between LWS change and TWS change should be studied further,which is important to understand the driving mechanism of water resources change.

关键词： Lake expansion GRACE Water storage change Precipitation Glacier meltwater

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Panorama completion for street views

引用

Computational Visual Media 2015年第1期1卷 49-57页

作者： zhe Zhu Ralph R.Martin Shi-min Hu TNLIST Department of Computer Science and Technology Tsinghua University School of Computer Science & Informatics Cardiff University

This paper considers panorama images used for street views. Their viewing angle of 360° causes pixels at the top and bottom to appear stretched and warped. Although current image completion algorithms work well, they cannot be directly used in the presence of such distortions found in panoramas of street views. We thus propose a novel approach to complete such 360° panoramas using optimizationbased projection to deal with distortions. Experimental results show that our approach is efficient and provides an improvement over standard image completion algorithms.

关键词： image completion panorama street views structure-rectifying warp

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of Mg Addition on Nucleation of Intra-granular Acicular Ferrite in Al-killed Low Carbon Steel

引用

Journal of Iron and Steel Research International 2016年第5期23卷 415-421页

作者： Xiao-bing LI Yi min zhe YU Cheng-jun LIU Mao-fa JIANG Key Laboratory for Ecological Metallurgy of Multimetallic mineral(ministry of Education) Northeastern University

To verify the formation behaviors and mechanisms of intra-granular acicular ferrite（ IAF） grains nucleated by Mg-Al-O in low carbon steel,the steels containing different Mg contents were refined in a vacuum induction furnace. The effect of Mg addition on the formation of IAF structure in Al-killed low carbon steel was investigated by optical microscope（ OM） and scanning electron microscope with energy dispersive X-ray spectroscope（ SEM-EDX）. It reveals that the IAFs are only detected in Mg-added steels,and the volume fraction of IAF increases with the Mg concentration from 8 × 10^（-6） to 26 × 10^（-6）. It shows that not only the MgO-Al_2O_3-MnS and MgO-Al_2O_3-P_2O_5 particles are the effective nucleation sites for IAF,but also the pure MgO·Al_2O_3 phase can promote the ferrite nucleation. A Mn-depletion zone（ MDZ） is characterized adjacent to the MgO-Al_2O_3-MnS,which is believed to be one of the possible mechanisms to explain the IAF nucleation. The MDZ around the MgO-Al_2O_3-MnS inclusion would be induced by the Mn S precipitation on the inclusion. It seems that the ability of Mg-containing inclusions to induce the nucleation of ferrite might be attributed to a new mechanism,i. e.,the Prich zone formed on a few Mg-Al-O inclusions might be another factor for promoting the IAF formation.

关键词： low carbon steel inclusion magnesium intra-granular acicular ferrite Mn-depletion zone

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Experimental and numerical study on protective effect of RC blast wall against air shock wave

引用

Defence Technology（防务技术） 2024年第1期31卷 567-579页

作者： Xin-zhe Nian Quan-min Xie Xin-li Kong Ying-kang Yao Kui Huang State Key Laboratory of Precision Blasting Jianghan UniversityWuhan430056China Hubei Key Laboratory of Blasting Engineering Jianghan UniversityWuhan430056China Hubei(Wuhan)Institute of Explosion and Blasting Technology Jianghan UniversityWuhan430056China College of Defense Engineering Army Engineering University of PLANanjing210007China Institute of Defense Engineering AMSPLALuoyang471023China

Prototype experiments were carried out on the explosion-proof performance of the RC blast *** mass of TNT detonated in the experiments is 5 kg and 20 kg *** shock wave overpressure was tested in different *** above experiments were numerically simulated,and the simulated shock wave overpressure waveforms were compared with that tested and given by CONWEP *** results show that the numerically simulated waveform is slightly different from the test waveform,but similar to CONWEP *** dimensional analysis and numerical simulation under different working conditions,the equation for the attenuation rate of the diffraction overpressure behind the blast wall was *** to the corresponding standards,the degree of casualties and the damage degree of the brick concrete building at a certain distance behind the wall can be determined when parameters are *** above results can provide a reference for the design and construction of the reinforced concrete blast wall.

关键词： Blast wall Shock wave Diffraction Overpressure Protection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Update on Fengyun Meteorological Satellite Program and Development

引用

空间科学学报 2020年第5期40卷 884-897页

作者： ZHANG Peng CHEN Lin XIAN Di XU zhe GUAN min National Satellite Meteorological Center/National Center for Space Weather China Meteorological AdministrationBeijing 100081

China began to develop its meteorological satellite program since *** 50-years’growing,there are 17 Fengyun(FY)meteorological satellites launched *** present,seven of them are in orbit to provide the operational service,including three polar orbiting meteorological satellites and four geostationary meteorological *** last COSPAR report,no new Fengyun satellite has been *** information of the on-orbit FY-2 series,FY-3 series,and FY-4 series has been ***-3D and FY-2H satellites accomplished the commission test and transitioned into operation in ***-2E satellite completed its service to decommission in *** web-based users and Direct Broadcasting(DB)users keep growing worldwide to require the Fengyun satellite data and products.A new Mobile Application Service has been launched to Fengyun users based on the cloud technology in *** this report,the international and regional co-operations to facilitate the Fengyun user community have been addressed *** strengthen the data service in the Belt and Road countries,the Emergency Support Mechanism of Fengyun satellite(FY_ESM)has been established since ***,a Recalibrating 30-years’archived Fengyun satellite data project has been founded since *** project targets to generate the Fundamental Climate Data Record(FCDR)as a space agency response to the Global Climate Observation System(GCOS).At last,the future Fengyun program up to 2025 has been introduced as well.

关键词： Fengyun meteorological satellite Product and data service International co-operation and supporting Historical Chinese Fengyun satellite data recalibrating Future program

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research on process modeling and simulation of spent lead paste desulfurization enhanced reactor

引用

Chinese Journal of Chemical Engineering 2023年第8期60卷 293-303页

作者： Lijuan Zhao zhe tan Xiaoguang Zhang Qijun Zhang Wei Wang Qiang Deng Jie Ma De'an Pan Institute of Circular Economy Beijing University of TechnologyBeijing 100124China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China China Ecological Civilization Research and Promotion Association Beijing 100035China

In the reaction process of carbonate desulfurization lead paste,the produced PbCO_(3) is easily wrapped in the outer periphery of PbSO_(4) to form a product layer,hindering the mass transfer ***,it is necessary to break the PbCO_(3) product *** this work,the rotor stator-reinforced reactor was selected as the enhanced desulfurization reactor for the purpose of breaking the PbCO_(3) product layer and promoting mass *** breakage process of the PbCO_(3) product layer generated during the PbSO_(4) desulfurization was *** fluid dynamics simulation to the rotation conditions was carried out to theoretically analyze the fluid flow characteristics of PbSO_(4) slurry and the wall shear stress affecting the breakage of PbCO_(3) product *** optimizing the rotation conditions,the distribution ratio of effective rotor wall shear stress range achieved 96.1%,and the stator wall shear stress range reached 99.15%under a rotation of 2000 r·min^(-1).The research work provides a reference for analysis of the mechanism of product layer breakage in the PbSO_(4) desulfurization process,and gives a clear and intuitive systematic study on the fluid flow characteristics and wall shear stress of the desulfurization reactor.

关键词： Chemical reactors Computational fluid dynamics CFD Simulation Desulfurization Core-shell structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Atomic-scale characterization of multiple precipitating species in a precipitation-hardened martensitic stainless steel

引用

Journal of Iron and Steel Research International 2022年第2期29卷 207-214页

作者： zhen-bao Liu zhe Yang Jian-xiong Liang Zhi-yong Yang Guang-min Sheng Division of Special Steels Central Iron and Steel Research Institute(CISRI)Beijing100081China School of Material Science and Engineering Chongqing UniversityChongqing400044China

Multiple precipitating species in a 2.2 GPa grade precipitation-hardened martensitic stainless steel with balanced ductility were characterized at atomic scale by atom probe *** results indicated that the clustering of solute atoms was promoted with progressive aging treatments.(Cr,Mo)-rich carbide(M_(2)C)precipitated at the linear dislocations in the as-aged *** segregation of Cr,Mo,and C at phase boundaries favored the precipitation of carbide and caused the formation of Cr-lean *** decomposition of martensitic matrix during aging led to the substantial precipitation of fine Cr-rich(α′Cr)*** with the first aging treated samples,a synergistic enhancement of both strength and ductility of the secondary aging treated(SAT)samples was primarily ascribed to the enhanced precipitation of Cr-rich ***,Ni-rich filmy reversed austenite precipitated at the lath boundary,which was beneficial to the ductility of SAT samples.

关键词： Aging treatment Nanoprecipitate Atom probe Spinodal decomposition Precipitation-hardened martensitic stainless steel

来源：

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

Taxonomic study of the genus Deltonotus Hancock (Orthoptera: Cladonotidae) with description of a new species

引用

Zoological Systematics 2014年第4期39卷 576-578页

作者： Li-Liang Lin zhe-min zheng Institute of Zoology Shaanxi Normal University

The genus Deltonotus Hancock, 1904 was reviewed, including one new species, D. wuzhishanensis sp. nov. A key to species of the genus Deltonotus Hancock, 1904 is given. The type specimens are deposited in the Institute... 详细信息

关键词： Orthoptera Cladonotidae key to Deltonotus new species

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hemoglobin loss method calculates blood loss during pancreaticoduodenectomy and predicts bleeding-related risk factors

引用

World Journal of Gastrointestinal Surgery 2024年第2期16卷 419-428页

作者： Chao Yu Yi-min Lin Guo-zhe Xian Department of Hepatobiliary Surgery Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021Shandong ProvinceChina

BACKGROUND The common clinical method to evaluate blood loss during pancreaticoduoden-ectomy(PD)is visual inspection,but most scholars believe that this method is extremely subjective and ***,there is no accurate,objective me-thod to evaluate the amount of blood loss in PD *** retrospectively analyzed the clinical data of 341 patients who underwent PD in Shandong Provincial Hospital from March 2017 to February *** to different surgical methods,they were divided into an open PD(OPD)group and a laparoscopic PD(LPD)*** differences and correlations between the in-traoperative estimation of blood loss(IEBL)obtained by visual inspection and the intraoperative calculation of blood loss(ICBL)obtained using the Hb loss method were ***,IEBL and perioperative calculation of blood loss(PCBL)were compared between the two groups,and single-factor regression analysis was *** There was no statistically significant difference in the preoperative general patient information between the two groups(P>0.05).PD had an ICBL of 743.2(393.0,1173.1)mL and an IEBL of 100.0(50.0,300.0)mL(P200μmol/L(95%CI:7.09-644.26;P=0.045)were independent risk factors for *** ICBLs of the LPD group and OPD group were 767.7(435.4,1249.0)mL and 663.8(347.7,1138.2)mL,respectively(P>0.05).The IEBL of the LPD group 200.0(50.0,200.0)mL was slightly greater than that of the OPD group 100.0(50.0,300.0)mL(P>0.05).PCBL was greater in the LPD group than the OPD group[1061.6(612.3,1632.3)mL vs 806.1(375.9,1347.6)mL](P<0.05).CONCLUSION The ICBL in patients who underwent PD was greater than

关键词： Pancreaticoduodenectomy Hemoglobin loss Calculated blood loss Estimated blood loss

来源：

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

Sphere Face Model: A 3D morphable model with hypersphere manifold latent space using joint 2D/3D training

引用

Computational Visual Media 2023年第2期9卷 279-296页

作者： Diqiong Jiang Yiwei Jin Fang-Lue Zhang zhe Zhu Yun Zhang Ruofeng Tong min tang zhejiang University Hangzhou 310058China Victoria University of Wellington Wellington 6012New Zealand Duke University DurhamNorth Carolina 27708USA Communication University of zhejiang Hangzhou 310019China

3D morphable models(3DMMs)are generative models for face shape and *** works impose face recognition constraints on 3DMM shape parameters so that the face shapes of the same person remain ***,the shape parameters of traditional 3DMMs satisfy the multivariate Gaussian *** contrast,the identity embeddings meet the hypersphere distribution,and this conflict makes it challenging for face reconstruction models to preserve the faithfulness and the shape consistency *** other words,recognition loss and reconstruction loss can not decrease jointly due to their conflict *** address this issue,we propose the Sphere Face Model(SFM),a novel 3DMM for monocular face reconstruction,preserving both shape fidelity and identity *** core of our SFM is the basis matrix which can be used to reconstruct 3D face shapes,and the basic matrix is learned by adopting a twostage training approach where 3D and 2D training data are used in the first and second stages,*** design a novel loss to resolve the distribution mismatch,enforcing that the shape parameters have the hyperspherical *** model accepts 2D and 3D data for constructing the sphere face *** experiments show that SFM has high representation ability and clustering performance in its shape parameter ***,it produces highfidelity face shapes consistently in challenging conditions in monocular face *** code will be released at https://***/a686432/SIR.

关键词： facial modeling deep learning face reconstruction 3D morphable model(3DMM)

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：