检索结果-南通市图书馆

Chinese Physics B 2011年第2期20卷 1-6页

作者： Zang Hua-Ping Li wen-feng Linghu Rong-feng cheng Xin-Lu Yang Xiang-Dong Institute of Atomic and Molecular Physics Sichuan University Chengdu 610065 China School of Physics and Electronic Science Guizhou Normal University Guiyang 550001 China

This paper applies the multiple ellipsoid model to the 16Ne （20Ne, 28Ne, 34Ne）-Na2 collision systems, and calcu- lates integral cross sections for rotational excitation at the incident energy of 190 meV. It can be seen that the accuracy of the integral cross sections can be improved by increasing the number of equipotential ellipsoid surfaces. Moreover, by analysing the differences of these integral cross sections, it obtains the change rules of the integral cross sections with the increase of rotational angular quantum number j＇, and with the change of the mass of isotope substitution neon atom. Finally, the contribution of different regions of the potential to inelastic cross sections for 20Ne-Na2 collision system is investigated at relative incident energy of 190 meV.

关键词： multiple hard-ellipsoid model Ne isotopic atoms integral cross sections ellipsoid equipotential surface

Safety evaluation of donors for living-donor liver transplantation in Chinese mainland:A single-center report

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2007年第32期13卷 4379-4384页

作者： Guo-Qiang Li feng Zhang Xiang-cheng Li Bei-cheng Sun feng cheng wen-Gang Ge Xue-Hao Wang Liver Transplantation Center First Affiliated Hospital of Nanjing Medical University Nanjing 210029 Jiangsu Province China

AIM： To discuss the safety of donors during living donor liver transplantation （LDLT） and the authors＇ experience with 50 cases. METHODS： Between January 1995 and March 2006, 50 patients with end-stage liver disease received LDLT in our department. Donors （at the age of 27-58 years） were healthy and antibody （ABO）-compatible. The protocol of evaluation and selection of donors, choice of surgical methods and strategy applied in the safety evaluation of donors were analyzed. RESULTS： A total of 115 candidate donors were evaluated for LDLT at our center. Of these, 50 underwent successful hepatectomy for living donation. The elimination rate for donors was 43.5%. Positive hepatitis serology and ABO incompatibility were the main factors for excluding candidates. All donors recovered uneventfully. The follow-up time ranged from 3 to 135 too. The incidence of major and minor medical complications was 12.0% and 28.0%, respectively. CONCLUSION： LDLT provides an excellent approach to the problem of donor shortage in China. With a thorough and complete preoperative workup and meticulous intra-and postoperative management, LDLT can be performed with minimal donor morbidity.

关键词： Liver transplantation Living donor Safety Evaluation

Mineral phase reconstruction behavior of direct reduction and smelting titanium slag at high temperature and slow cooling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2015年第6期34卷 440-444页

作者： Yi-Jie Wang Shu-Ming wen Qi-cheng feng Zhi-wen Ye Min Wang State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Faculty of Land Resource Engineering Kunming University of Science and Technology Advanced Analysis and Measurement Center Yunnan University

Titanium slag in this study was produced by subjecting titanomagnetite concentrate to direct reductionelectric furnace smelting. Processing mineralogy and mineral phase reconstruction behavior at high temperature and slow cooling treatment were examined by chemical analysis, X-ray diffraction （XRD）, optical microscopy （OM）, scanning electron microscopy （SEM）, and energydispersive spectroscopy （EDS）. Anosovite solid solution is the main titanium product by the direct reduction and smelting process. Results of slow-cooling experiments show that crystal volume and size increase as cooling rate decreases. Anosovite and gangue mineral crystals develop fully with large crystal volume and size at a cooling rate of 2 ***-1. Moreover, the growth of anosovite crystal was characterized by crystal nucleation and growth theory. These results provide further insights into the separation of anosovite from gangue by mineral processing.

关键词： Direct reduction Smelting titanium slag Anosovite Slow cooling Crystal

Copper homeostasis and neurodegenerative diseases

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第11期20卷 3124-3143页

作者： Yuanyuan Wang Daidi Li Kaifei Xu Guoqing Wang feng Zhang International Research Laboratory of Ethnomedicine of Ministry of Education Key Laboratory of Basic Pharmacology of Ministry of EducationLaboratory Animal Center and Key Laboratory of Basic Pharmacology of Guizhou ProvinceZunyi Medical UniversityZunyiGuizhou ProvinceChina

Copper,one of the most prolific transition metals in the body,is required for normal brain physiological activity and allows various functions to work normally through its range of *** homeostasis is meticulously maintained through a complex network of copper-dependent proteins,including copper transporters(CTR1 and CTR2),the two copper ion transporters the Cu-transporting ATPase 1(ATP7A)and Cu-transporting beta(ATP7B),and the three copper chaperones ATOX1,CCS,and *** in copper homeostasis can lead to either the deficiency or accumulation of copper in brain *** evidence suggests that abnormal copper metabolism or copper binding to various proteins,including ceruloplasmin and metallothionein,is involved in the pathogenesis of neurodegenerative ***,the exact mechanisms underlying these processes are not *** is a potent oxidant that increases reactive oxygen species production and promotes oxidative *** reactive oxygen species levels may further compromise mitochondrial integrity and cause mitochondrial *** oxygen species serve as key signaling molecules in copper-induced neuroinflammation,with elevated levels activating several critical inflammatory ***,copper can bind aberrantly to several neuronal proteins,including alphasynuclein,tau,superoxide dismutase 1,and huntingtin,thereby inducing neurotoxicity and ultimately cell *** study focuses on the latest literature evaluating the role of copper in neurodegenerative diseases,with a particular focus on copper-containing metalloenzymes and copper-binding proteins in the regulation of copper homeostasis and their involvement in neurodegenerative disease *** synthesizing the current findings on the functions of copper in oxidative stress,neuroinflammation,mitochondrial dysfunction,and protein misfolding,we aim to elucidate the mechanisms by which copper contributes to a wide range of heredit

关键词： Alzheimer's disease amyotrophic lateral sclerosis disease copper homeostasis copper toxicity Huntington's disease Menkes'disease multiple sclerosis neurodegenerative disease Parkinson's disease Wilson's disease

Lattice Boltzmann method for simulating flows in open-channel with partial emergent rigid vegetation cover

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2019年第4期31卷 717-724页

作者： Zhong-hua Yang feng-peng Bai wen-xin Huai cheng-guang Li State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430072 China Changjiang Water Resources Protection Institute Wuhan 430051 China Shandong Provincial Key Laboratory of Water Resources and Water Environment Water Resources Research Institute of Shandong Province Jinan 250013 China

Flows in open-channel with partial emergent rigid vegetation cover are simulated using the lattice Boltzmann method (LBM) described by the 2-D nonlinear shallow water equations. The effect of vegetation is represented with the vegetation roughness coefficient, which is related to the vegetation density, diameter of the vegetation elements and drag coefficient. The model is verified by three numerical tests: flow in a 180° curved open channel with partial vegetation cover at the outer bank, flow in a rectangular channel with a finite patch of vegetation and flow in a rectangular channel with a vegetated bank. Numerical results are compared with the experimental data, and the good agreement proved that the presented model can model the vegetated channel flows correctly.

关键词： Open-channel flow rigid vegetation lattice Boltzmann method (LBM) shallow water equations vegetation roughness coefficient

Corporate Credit Ratings Based on Hierarchical Heterogeneous Graph Neural Networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Machine Intelligence Research 2024年第2期21卷 257-271页

作者： Bo-Jing feng Xi cheng Hao-Nan Xu wen-Fang Xue Center for Research on Intelligent Perception and Computing National Laboratory of Pattern RecognitionInstitute of AutomationChinese Academy of SciencesBeijing 100190China

order to help investors understand the credit status of target corporations and reduce investment risks,the corporate credit rating model has become an important evaluation tool in the financial *** models are based on statistical learning,machine learning and deep learning especially graph neural networks(GNNs).However,we found that only few models take the hierarchy,heterogeneity or unlabeled data into account in the actual corporate credit rating ***,we propose a novel framework named hierarchical heterogeneous graph neural networks(HHGNN),which can fully model the hierarchy of corporate features and the heterogeneity of relationships between *** addition,we design an adversarial learning block to make full use of the rich unlabeled samples in the financial *** experiments conducted on the public-listed corporate rating dataset prove that HHGNN achieves SOTA compared to the baseline methods.

关键词： Corporate credit rating hierarchical relation heterogeneous graph neural networks adversarial learning

Two-Agent Scheduling on a Bounded Parallel-Batching Machine with Makespan and Maximum Lateness Objectives

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2020年第1期8卷 189-196页

作者： Qi feng Wei-Ping Shang cheng-wen Jiao wen-Jie Li College of Science Zhongyuan University of TechnologyZhengzhou 450007China School of Mathematics and Statistics Zhengzhou UniversityZhengzhou 450001China School of Mathematical Sciences Luoyang Normal UniversityLuoyang 471022China

This paper studies the two-agent scheduling on a bounded parallel-batching *** the problem,there are two agents A and B each having their own job sets with the restriction that the processing times of jobs of agent B are *** jobs of different agents can be processed in a common ***,each agent has its own objective function to be *** objective function of agent A is the makespan of its jobs,and the objective function of agent B is the maximum lateness of its *** present a polynomial-time algorithm for finding all Pareto optimal solutions of this two-agent parallel-batching scheduling problem.

关键词： Two-agent scheduling Parallel-batching Maximum lateness Pareto optimal points

Characterization of CeO_(2)microspheres fabricated by an ultrasonic spray pyrolysis method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2021年第1期40卷 31-39页

作者： Shou-feng Xue Yi-Juan Li feng-Hua Zheng Xue Bian wen-Yuan Wu cheng-Hao Yang Guangzhou Key Laboratory for Surface Chemistry of Energy Materials New Energy Research InstituteSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006China Institute of Metallurgy Northeastern UniversityShenyang 110000China

CeO_(2) is one of the main catalysts for solid oxide fuel cell(SOFC).It is critical to find a green and costeffective fabrication method for CeO_(2) at *** this study,the CeO_(2) microspheres were prepared by one-step ultrasonic spray pyrolysis of cerium chloride solution at700℃.Scanning electron microscopy(SEM)and transmission electron microscopy(TEM)study demonstrate that the prepared CeO_(2) microspheres exhibit a particle size of0.01-1.08μm with a mean particle size of 0.23μm,and more than 94%of the particles have a diameter less than0.5μ*** the presence of residual Cl in the fabricated CeO_(2) microspheres blocks the active sites and leads to the significant degradation of SOFC *** formation mechanism and distribution of residual Cl in the fabricated CeO_(2) microspheres were systemic ally *** water washing method was shown to effectively reduce the residual Cl in the CeO_(2) ***,this work provides a clean manufacturing process for the preparation of SOFC electrode/electrolyte materials.

关键词： CeO_(2) Residual chlorine Ultrasonic spray pyrolysis

Composition evolution and deformation of different non-metallic inclusions in a bearing steel during hot rolling

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2022年第4期29卷 552-562页

作者： Nan Liu Gong cheng Li-feng Zhang wen Yang Ying Ren Guo-cheng Wang Xiao-ming Liu School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Steelmaking Plant Baotou Steel Union Co.Ltd.Baotou 014010Inner MongoliaChina Engineering Technology Co. Ltd.WISDRI Engineering and Research Incorporation LimitedWuhan 430223HubeiChina School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China School of Materials and Metallurgy University of Science and Technology LiaoningAnshan 114051LiaoningChina

The composition evolution and deformation of different non-metallic inclusions in a bearing steel during hot rolling were investigated by the automatic detection and the improved non-aqueous electrolysis *** sulfide,MnS–TiN,and liquid CaO–Al_(2)O_(3) inclusions were elongated while TiN and MgO-Al_(2)O_(3) were fractured during hot *** CaS–MnS phase in the MgO–Al_(2)O_(3)–CaS–MnS inclusion was separated from the inclusion,leading to the formation of CaS–MnS type ***,the CaS and MnS contents in oxide-containing inclusions decreased while the MgO and Al_(2)O_(3) contents increased after hot *** deformability of different inclusions in the bearing steel was quantitatively compared and discussed.

关键词： Bearing steel Hot rolling Composition evolution Deformability Inclusion

Revolutionizing breast cancer detection:Advances in fluorescent probe technology

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 Research 2025年第1期18卷 653-674页

作者： Qian Gao Lin Tang Jun Zhan Yiyuan Xue feng Luo State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases West China Hospital of StomatologySichuan UniversityChengdu 610041China Emergency Obstetrics and Gynecology West China Second University HospitalSichuan UniversityChengdu 610041China Department of Obstetrics and Gynecology West China Second University HospitalSichuan UniversityChengdu 610041China Department of Prosthodontics West China School of StomatologySichuan UniversityChengdu 610041China

With the increasing incidence of breast cancer globally,there is an urgent demand for enhanced diagnostic and therapeutic *** comprehensive review explores advancements in fluorescent probe technology for breast cancer imaging and early *** probes offer unparalleled sensitivity and specificity in detecting cancer biomarkers,enabling early diagnosis and delineation of tumor margins during *** categorize these probes into molecular,nano,ratiometric,the second near-infrared window(NIR-II),and multifunctional varieties,each with unique capabilities for targeting specific cancer *** review highlights recent innovations in probe design,emphasizing their applications in pathogenesis studies,drug development,precision medicine,and fluorescence-guided *** their promising clinical potential,challenges such as safety,biomarker targeting accuracy,system compatibility,and clinical translation *** these hurdles is crucial for the integration of fluorescent probes into standard cancer care,aiming to improve treatment outcomes and patient quality of life.

关键词： breast cancer fluorescent probes imaging early diagnosis biomarker