检索结果-南通市图书馆

Acta Geochimica 2024年第4期43卷 707-718页

作者： jun-xiao Ma Guang-shu Yang Yong-feng Yan xiao-Fei Xu Yun-hua Ren Hui Zhao xiao-jun zheng Yuan Qin Faculty of Land Resources Engineering Kunming University of Science and TechnologyKunming 650093China Geological Team 306 of Yunnan Non-Ferrous Metals Geological Bureau Kunming 650217China Yunnan Provincial Bureau of Non-Ferrous Geology Kunming 650051China

The Dahongshan Group,situated at the southwestern margin of the Yangtze Block,represents a geological unit characterized by relatively high-grade metamorphism in the *** paper investigates the garnet-biotite schist from the Laochanghe Formation of the Dahongshan Group,employing an integrated approach that includes petrological analysis,phase equilibrium modeling,and zircon U-Pb *** schist is mainly composed of garnet,biotite,plagioclase,quartz,rutile,and *** equilibrium modeling revealed the peak metamorphic conditions of 8-9 kbar and 635-675°*** further integrating the prograde metamorphic profile of garnet and geothermobarometric results,a clockwise P-T metamorphic evolution path is constructed,which includes an increase in temperature and pressure during the prograde ***-ICP-MS zircon U-Pb dating and zircon Ti thermometry constrains the post-peak metamorphic age of 831.2±7.2 *** with previously reported results,it is revealed that the southwestern margin of the Yangtze Block experienced a large-scale regional metamorphism during the Neoproterozoic(890-750 Ma),which is related to the collisional orogenic *** may be associated with the late-stage assembly of the Rodinia supercontinent or with local compression and subduction processes during the breakup of the Rodinia supercontinent.

关键词： Southwestern Yangtze Block Dahongshan Group Phase equilibrium modeling Zircon U-Pb dating Neoproterozoic metamorphism

Synthesis and Crystal Structure of N-[4-(4-Methyl-phenylsulfamoyl)-phenyl]- 4-methyl-1,2,3-thiadiazole-5-carboxamide

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2007年第5期26卷 501-504页

作者： WANG Jian-Guo xiao Yong-jun Li zheng-Ming SONG Hai-Bin （Elemento-organic Chemistry hlstitute State Key Laboratory ofElemento-organic Chemistry Nankai University Tianjin 300071 China

The crystal structure of the title compound （C17H16N4O3S2, Mr = 388.46） has been determined by single-crystal X-ray diffraction. The crystal belongs to monoclinic, space group P21/c with a = 13.688（2）, b = 16.704（3）, c = 8.3308（12）A, β = 99.474（6）°, V = 1878.8（5） A^3, Mr = 388.46, Z = 4, Dc = 1.373 g/cm3, μ = 0.308 mm^–1, F（000） = 808, R = 0.0389 and wR = 0.0917. X-ray analysis reveals that the crystal structure involves intermolecular N–H…O and N–H…N hydrogen bonds, which link the molecules into a layer parallel to the ac plane.

关键词： X-ray diffraction crystal structure synthesis

Registering Different DBMSs to Panorama with CORBA

在线全文

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2001年第Z1期6卷 423-431页

作者： Sarem Mudar, Li Rui\|xuan, xiao Wei\|jun, Lu zheng\|ding School of Computer Science, Huazhong University of Science and Technology,Wuhan 430074, China School of Computer Science Huazhong University of Science and Technology Wuhan China

Recently, there is an increasing use of CORBA implementation in developing multidatabase systems. MIND and Panorama are some of the examples of multidatabase prototypes that have been implemented on the top of CORBA compliant namely ObjectBroker and VisiBroker respectively. They both aim to achieve interoperability among Oracle, Sybase and other different DBMSs through the registration of these DBMSs to them using CORBA. This registration to a CORBA based multidatabase system offers an advanced way in achieving *** first introduce Panorama multidatabase system and discuss the basic implementation decisions in registering different DBMSs using the CORBA compliant ORB, namely VisiBroker to this system. Then, it aims to discuss the method we've used in registering different DBMSs to our designed multidatabase system Panorama. A detailed discussion about the registration of Oracle8 and Sybase is given. And finally, a conclusion and the future work for this system have been given.

关键词： heterogeneity CORBA interoperability multidatabase system

Experimental Study on Geometry Characteristics of Turbulent Premixed Flames for Natural Gas/Air Mixtures

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2025年第1期34卷 268-282页

作者： zheng Weilin WANG Qijiao xiao Huahua CHEN xiaoxiao XIE Fan ZENG Wen Liaoning Key Lab of Advanced Test Technology for Aerospace Propulsion System Shenyang Aerospace University State Key Laboratory of Fire Science University of science and Technology of China AVIC Shenyang Aircraft Design and Research Institute

In this study,focusing on the geometry characteristics of spherical expanding flame,the turbulent premixed flames of natural gas/air mixtures were investigated in a fan-stirred turbulent *** effects of initial temperature（T=300-400 K）,initial pressure（P=0.1-0.3 MPa）,turbulence intensity（u'=1.0-2.7 m/s）,oxygen volumetric percentage(φ（O2）=15%-21%) and carbon dioxide volumetric percentage(φ（CO2）=0-20%)were delved *** flame profile under the Cartesian coordinate system was derived from the schlieren images taken by the high-speed ***,from both macroscopic and microscopic perspectives,the influence of experimental conditions on the flame geometry characteristics was explored through flame front extraction,wavelet decomposition and network *** results demonstrate that for significant flame wrinkling,changes in species concentrations and turbulence intensity have more pronounced effects on the flame wrinkling *** wrinkling of the flame front maintains a certain degree of similarity,as evidenced by the locally concentrated distribution of the angles of the maximum fluctuation *** disturbance energy under large-scale（D6-D8） disturbances exhibits relatively high values with a similar trend,exerting a significant impact on the geometry characteristics of the flame *** peaks of correlation degree are scattered either with the decomposition scale or the development of flame radius,indicating no linear correlation between different detail ***,the probability distribution of node degrees in key wrinkled regions exhibits different trends with that of large-scale wrinkling and disturbance energy,especially with changes in initial *** occurs because the number of key wrinkles varies based on the perturbation's strength or the region's ***,an increase in the fluctuation frequency of the flame's local radius may not necessarily lead to an increase in the number of key folded regions.

关键词： fan-stirred turbulent combustor geometry characteristics large-scale wrinkling network topology wavelet decomposition

Hole density dependent magnetic structure and anisotropy in Fe-pnictide superconductor

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2023年第9期32卷 463-467页

作者：岳远放黄忠兵黎欢明星郑晓军 College of Science Guilin University of TechnologyGuilin 541004China Key Laboratory of Low-dimensional Structural Physics and Application Education Department of Guangxi Zhuang Autonomous RegionGuilin 541004China Faculty of Physics Hubei UniversityWuhan 430062China

The competition between different magnetic structures in hole-doped Fe-pnicitides is explored based on an extended five-orbital Hubbard model including long-range Coulomb *** results show that the stabilized magnetic structure evolves with increasing hole doping ***,the stripe antiferromagnetic phase dominates at zero doping,while magnetic structures with more antiferromagnetic linking numbers such as the staggered tetramer,staggered trimer,and staggered dimer phases become energetically favorable as the hole density *** a certain doping level,energy degeneracy of different magnetic structures appears,indicating strong magnetic frustration and magnetic fluctuations in the *** suggest that the magnetic competition induced by the hole doping may explain the fast decrease of the Neel temperature TNand the moderately suppressed magnetic moment in the hole doped ***,our results show a sign reversal of the kinetic energy anisotropy as the magnetic ground state evolves,which may be the mechanism behind the puzzling sign reversal of the in-plane resistivity anisotropy in hole-doped Fe-pnicitides.

关键词： iron-pnictide superconductors magnetic structure resistivity anisotropy

图像配准中方向场正则化模型的适定性和收敛性

在线全文

学校读者我要写书评

暂无评论

数学学报（中文版） 2021年第3期64卷 385-404页

作者：郑晓俊郇中丹刘君海南师范大学初等教育学院海口571158 北京师范大学数学科学学院北京100875

图像配准是图像处理的一个重要方面.方向场正则化模型是现有配准方法中效果相对突出的模型.然而它仍然无法正确对齐所有感兴趣的区域.因此,本文从理论角度研究方向场正则化模型,希望寻找模型设计可能存在的问题.由于模型中有一个直接变... 详细信息

图像配准是图像处理的一个重要方面.方向场正则化模型是现有配准方法中效果相对突出的模型.然而它仍然无法正确对齐所有感兴趣的区域.因此,本文从理论角度研究方向场正则化模型,希望寻找模型设计可能存在的问题.由于模型中有一个直接变量和一个由直接变量通过常微初值问题确定的间接变量,所以它是数学上的一类新颖的正则化模型.方向场正则化模型定义为min_(v){α||v||_(H)^(2)+ρ(T(y^(v)(τ)),S)},其中T和S分别是模板图像和参考图像,y^(v)(τ):x■y^(v)(τ;0,x)是由初值问题dy/ds=v(s,y),y(0)=x的解y^(v)(s;0,x)定义的变换,ρ是相似性泛函,α>0是正则化参数,H是希尔伯特空间.本文首先证明了方向场正则化模型有稳定解,然后证明了其收敛性.结合y^(v)(τ)与v的收敛关系和正则化问题的经典理论可得上述结论.然而,在现有理论下,ρ,S和T需满足较强的条件.本文通过充分利用y^(v)(τ)的性质,提出了关于ρ,S和T的相对弱的条件.此外,我们还验证了配准常用的3个相似性泛函都满足所提条件.

关键词：方向场正则化模型存在性稳定性收敛性图像配准

Marginal living donor in kidney transplantation： experience in a Chinese single center

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2013年第15期126卷 2810-2814页

作者： LI Gang WANG Yun-peng MA Lu-lin ZHANG Jing ZHANG Hong-xian HUANG Yi HOU xiao-fei xiao Chun-lei ZHAO Lei WANG Guo-liang TIAN xiao-jun QIU Min zheng Yi Peking Univ Hosp 3 Dept Urol Beijing 100191 Peoples R China Navy Gen Hosp Dept Special Med Beijing 100048 Peoples R China

Background Living donor kidney transplantation is becoming popular in China, whereas, in clinical situations, some kidney donors may be sub-optimal, namely marginal living donor. The present study aimed to evaluate the safety and efficacy of marginal living donor kidney transplantation in a Chinese single center. Methods Between January 2001 and December 2009, 888 kidney transplantations were performed in our center; 149 were living donor kidney transplantations. The living donors and recipients were followed up regularly after the operation. Of the living donors, 30 donors were marginal, who were older than 60 years or suffered from kidney anomaly or some benign diseases. Among the non-marginal living kidney transplantations, 58 donors and recipients had complete peri- operative and follow-up data. We compared the marginal and non-marginal living donor kidney transplantations with regard to donor age, follow-up period, donor＇s serum creatinine at the last follow-up, recipient＇s serum creatinine at the last follow-up, and graft survival at the last follow-up. Results The mean age of donors in the marginal and non-marginal living donors were （55＋9）（37-66） and （43＋12）（30- 59） years. The mean follow-up times of the marginal and non-marginal groups were （26.4＋13.4） months and （28.8＋14.8） months. The donor and recipient serum creatinine levels at the last follow-up were （1.16＋0.20） mg/dl and （1.30＋0.24） mg/dl in the marginal group, and （1.12＋0.32） mg/dl and （1.34＋0.32） mg/dl in the non-marginal group. Three recipients in the marginal group and five recipients in the non-marginal group had acute rejection episodes during the first year. Actuarial 3-year graft survival was 96.7% in the marginal group and 100% in the non-marginal group. No significant differences were detected between the two groups with regard to these data. Conclusion Utilization of highly selective marginal living donors can be a safe, feasible, and effective way for the treatment of patients with end

关键词： kidney transplantation marginal non-marginal living donor

Personalized federated few-shot node classification

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(Information Sciences) 2025年第1期68卷 204-218页

作者： Yunfeng ZHAO Xintong HE Guoxian YU jun WANG Yongqing zheng Carlotta DOMENICONI School of Software Shandong University Joint SDU-NTU Centre for Artificial Intelligence Research Shandong University Department of Mathematics National University of Singapore Department of Computer Science George Mason University

Personalized federated learning(PFL) aims to train customized models for individual clients in a decentralized setting, with the account of non-independent and identically distributed data across clients. However, most PFL methods adopt uniform classification layers for diverse clients and give rise to error-prone predictions, due to the task heterogeneity notably prominent in decentralized graph data scenarios. Although some PFL solutions setup client-specific classification layers for each client and optimize them only locally, they are corrupted with limited local training data. We propose an innovative solution called federated parameter decoupling and node augmentation(Fed PANo) to address these problems and to achieve personalized federated few-shot node classification, which is a prevalent and challenging but unexplored topic. Specifically, Fed PANo first separates the local model into the GNN and classifier to handle unique client-specific task variations. The GNN is trained through federated learning to capture shared knowledge of graph nodes across clients, while the classifier is custom-designed and trained individually for each client. Additionally, a generic classifier shared among clients is adopted to encourage the GNN's grasp of shared information. Then Fed PANo further proposes the node generator along with its local and collaborative training strategies to deal with the node scarcity of clients. Extensive experimental results on benchmark datasets confirm that Fed PANo outperforms eight competitive baselines across different settings.

关键词： personalized federated learning few-shot learning node classification task heterogeneity parameter decoupling node augmentation

Clinical outcomes and immune reconstitution in 103 advanced AIDS patients undergoing 12-month highly active antiretroviral therapy

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2006年第20期119卷 1677-1682页

作者： DAI Yi QIU Zhi-feng LI Tai-sheng HAN Yang ZUO Ling-yan XIE Jing MA xiao-jun LIU zheng-yin WANG Ai-xia Department of Infectious Diseases Peking Union Medical College Hospital Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100730 China

Background Highly active antiretroviral therapy （HAART） produces profound suppression of HIV replication, substantial increase in CD4^＋ T cells, and partial reconstitution of the immune system. However, the numbers of subjects were small in previous Chinese studies. This study evaluated the efficacy and side effects of HAART in Chinese advanced AIDS patients.Methods One hundred and three antiretroviral drug naive AIDS patients were enrolled in this study and were divided into two groups by their baseline CD4^＋ count：〈 100 cells/μl or ≥ 100 cells/μl. Clinical, virological and immunological outcomes were monitored at baseline and at 1, 3, 6, 9 and 12 months during the course of treatment with HAART.Results One patient died and another was lost from the follow-up. For the remaining 101 HIV/AIDS patients at the 12th month during the HAART, the plasma viral load （VL） was reduced to （3.2±0.7） lg copies/ml, the CD4^＋ count increased to （168 ±51） cells/μl [among which the naive phenotype （CD45RA^＋CD62L^＋） increased to （49 ±27） cells/μl and the memory phenotype （CD45RA^-） increased to （119 ±55） cells/μl], and the percentage of CD4^＋CD28^＋ cells increased. At the same time, there was a significant reduction of CD8^＋ T cell activation. In the 69 patients with the baseline CD4^＋ count 〈100 cells/μl, 37 had a VL 〈50 copies/ml; while in the 34 patients with the baseline CD4^＋ count ≥ 100 cells/μl, 25 had a VL 〈50 copies/ml, the difference between the two groups was statistically significant. The CD4^＋ T cell count showed a two-phase increase during HAART and a significant positive correlation was shown between the change of CD4^＋ count and plasma VL. Over 12 months of HAART, 10 patients had gastrointestinal side effects, 13 peripheral neuritis, 7 hepatic lesions, 8 hematological side effects, 8 skin rashes, 10 lipodystrophy and 1 renal calculus.Conclusions Immune reconstitution as well as the significantly improved clinical outcomes is observed in Chinese advanced AIDS pat

关键词： acquired immunodeficiency syndrome antiretroviral therapy, highly active CD4 lymphocyte count immune reconstitution adverse effects

Spontaneous Orientation Polarization of Anisotropic Equivalent Dipoles Harnessed by Entropy Engineering for Ultra‑Thin Electromagnetic Wave Absorber

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 424-438页

作者： Honghan Wang Xinyu xiao Shangru Zhai Chuang Xue Guangping zheng Deqing Zhang Renchao Che junye Cheng Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefinerySchool of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034People’s Republic of China School of Life Science and Biotechnology Dalian University of TechnologyDalian 116024People’s Republic of China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077People’s Republic of China School of Materials Science and Engineering Qiqihar UniversityQiqihar 161006People’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Department of Materials Science Shenzhen MSU-BIT UniversityShenzhen 517182People’s Republic of China

The synthesis of carbon supporter/nanoscale high-entropy alloys(HEAs)electromagnetic response composites by carbothermal shock method has been identified as an advanced strategy for the collaborative competition engineering of conductive/dielectric *** migration modes within HEAs as manipulated by the electronegativity,valence electron configurations and molar proportions of constituent elements determine the steady state and efficiency of equivalent ***,enlightened by skin-like effect,a reformative carbothermal shock method using carbonized cellulose paper(CCP)as carbon supporter is used to preserve the oxygencontaining functional groups(O·)of carbonized cellulose fibers(CCF).Nucleation of HEAs and construction of emblematic shell-core CCF/HEAs heterointerfaces are inextricably linked to carbon metabolism induced by O·.Meanwhile,the electron migration mode of switchable electronrich sites promotes the orientation polarization of anisotropic equivalent *** virtue of the reinforcement strategy,CCP/HEAs composite prepared by 35%molar ratio of Mn element(CCP/HEAs-Mn_(2.15))achieves efficient electromagnetic wave(EMW)absorption of−51.35 dB at an ultra-thin thickness of 1.03 *** mechanisms of the resulting dielectric properties of HEAs-based EMW absorbing materials are elucidated by combining theoretical calculations with experimental characterizations,which provide theoretical bases and feasible strategies for the simulation and practical application of electromagnetic functional devices(e.g.,ultra-wideband bandpass filter).

关键词： High-entropy alloys Carbothermal shock Switchable electron migration modes Emblematic shell-core heterointerfaces Ultra-thin thickness