检索结果-南通市图书馆

超声与增强CT测量原发性肝癌大小的结果对比

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

广西医学 2017年第10期39卷 1538-1541页

作者：邓喜青黄健源李一辉湖南省株洲市中心医院放射影像科株洲市412000

目的比较超声、增强CT测量原发性肝癌大小的结果。方法回顾性分析189例原发性肝癌患者的超声、增强CT检查结果,其中55例有术后病理标本。比较超声、增强CT对大病灶(CT测量长径>5 cm,共77例)、小病灶(CT测量长径≤5 cm,共112例)长径的测... 详细信息

目的比较超声、增强CT测量原发性肝癌大小的结果。方法回顾性分析189例原发性肝癌患者的超声、增强CT检查结果,其中55例有术后病理标本。比较超声、增强CT对大病灶(CT测量长径>5 cm,共77例)、小病灶(CT测量长径≤5 cm,共112例)长径的测量结果,并采用Bland-Altman分析评价两者测量结果的一致性;比较超声、增强CT、术后病理测量对小病灶标本(CT测量长径≤5 cm,共47例)长径的测量结果,评价超声、增强CT与病理测量的一致性。结果超声与增强CT对小病灶的测量结果比较差异有统计学意义(P0.05),两者对大病灶的测量结果具有较好的一致性。超声测量的小病灶长径大于病理测量(P0.05),两者对小病灶的测量结果与病理测量结果的一致性均较差。结论对于大的肝癌病灶,增强CT与超声的测量结果无明显差异,可相互替代,而对于小病灶,增强CT的测量结果可能会更准确,但两者均不能替代病理测量结果。

关键词：原发性肝癌超声增强CT 病理大小测量

适用于SiC化学气相沉积工艺的真空机组研究

在线全文

学校读者我要写书评

暂无评论

炭素 2016年第4期 28-29,10页

作者：周岳兵胡祥龙胡高健李益民中南大学粉末冶金研究院长沙410083 湖南顶立科技有限公司长沙410118

通过实验对不同真空泵应用于SiC化学气相沉积工艺的失效时间进行对比,并从结构上对不同真空泵失效的原理进行分析,确定了适用于SIC化学气相沉积工艺的真空泵组。

关键词： SiC 化学气相沉积真空泵

Dissecting the cell microenvironment of ovarian endometrioma through single-cell RNA sequencing

在线全文

学校读者我要写书评

暂无评论

Science China life Sciences 2025年第1期 116-129页

作者： jiangpeng Wu Siyu Xia Wenting Ye Yan Sun Jing Cai Fubing Yu Haiping Wen Xiuwei yi Taikang li Mingwei Chen Jiayun Chen Ge Song Chuanbin Yang Yali Song Jigang Wang Department of Reproductive Medicine Dongguan Maternal and Child Health Care Hospital Department of Urology and Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalSouthern University of Science and Technology State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs Artemisinin Research Centerand Institute of Chinese Materia MedicaChina Academy of Chinese Medical Sciences Reproductive Medicine Center Foshan Women and Children Hospital State Key Laboratory of Antiviral Drugs School of PharmacyHenan University

Ovarian endometrioma（OE）, also known as “chocolate cysts,” is a cystic mass that develops in the ovaries due to endometriosis and is a common gynecological condition characterized by the growth of endometrial tissue outside the uterus, leading to symptoms such as dysmenorrhea, pelvic pain, and infertility. However, the precise molecular and cellular mechanisms driving this pathophysiology remain largely unknown, posing challenges for diagnosis and treatment. Here, we employed integrated single-cell transcriptomic profiling of over 52,000 individual cells from endometrial tissues of OE patients and healthy donors and identified twelve major cell populations. We identified notable alterations in cell type-specific proportions and molecular signatures associated with OE. Notably, the activation of IGFBP5+macrophages with pro-inflammatory properties, NK cell exhaustion, and aberrant proliferation of IQCG+and KLF2+epithelium are key features and may be the potential mechanisms underlying the pathogenesis of OE. Collectively, our data contribute to a better understanding of OE at the single cell level and may pave the way for the development of novel therapeutic strategies.

关键词： ovary high-throughput sequencing transcriptomics gene expression analysis ligand-receptor analysis

同方期刊数据库

Effect of strain rate on plastic deformation bonding behavior of Ni-based superalloys

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第5期40卷 54-63页

作者： jian Yang Zhang Bin Xu Naeem ul Haq Tariq Ming Yue Sun Dian Zhong li yi yi li Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Department of Metallurgy and Materials Engineering Pakistan Institute of Engineering and Applied SciencesNiloreIslamabadPakistan

Plastic deformation bonding(PDB)has emerged as a promising solid state bonding technique with limited risk of phase transformations and residual thermal stresses in the *** this study,the PDB behavior of IN718 superalloy was systematically investigated by performing a series of isothermal compression tests at various processing *** was revealed that,with increasing PDB strain rate at 1000?C,different extents of dynamic recrystallization(DRX)occur in the bonding area of IN718 *** extent of DRX,average size of DRXed grains,and a newly proposed"interfacial bonding ratio(?Bonding)"parameter(to quantify the bond quality)were initially reduced with increase in the strain rate up to 0.1 s-1 and later increased at further higher strain *** backscattered diffraction(EBSD)and transmission electron microscopy(TEM)based interfacial microstructure analyses indicated that the quality of the bonded joints is closely related with the development of fine DRXed grains at the bonding interface with the increasing strain,which promotes adiabatic temperature *** was revealed that the initial bulging and subsequent migration of the original interfacial grain boundary(IGB)were the main mechanisms promoting DRX in the well bonded IN718 superalloy ***,the mechanical properties of the bonded joints were not only controlled by the recrystallized microstructure but also depended upon the Bonding parameter of the joints.

关键词： Inconel 718 superalloy Isothermal compression bonding Dynamic recrystallization Grain boundary Subgrain Strain rate

Effect of Counterface Material on Friction and Wear Behavior of Ni-Cr-W-Al-Ti-MoS_2 Composites

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2006年第B12期19卷 74-77页

作者： li jian-liang XIONG Dang-sheng WAN yi Department of Materials Science and Engineering Nanfing University of Science and Technology Nanjing 210094 China

Ni-Cr-W-Al-Ti-MoS2 self-lubricating composites were prepared through the powder metallurgy （P/M） method. Their friction properties were investigated by a pin-on-disk tribometer in the range from the room temperature to 600 ℃. Alumina, silicon nitride and nickel-iron-sulfide alloys were selected as the counterface materials. Results indicate that the lowest friction coefficients under 0.22 can be obtained at 600℃ when rubbed against alumina. When rubbed against nickel-iron-sulfide alloys, are presented the lowest wear rates in the magnitude of 10^-6 mm^3/N-m, one order of magnitude lower than those when rubbed against ceramics. In the case of three rubbing pairs, the wear rates of the composite containing MoS2 present themselves inversely proportional to friction coefficients. With alumina ceramics used as a counterface, transfer films and glaze layers will form on the contact surface playing a main role in lubrication at high temperatures. However, when silicon nitride and nickel-iron-sulfide alloy are used, the lubricating transfer films appear not to be prominent.

关键词： powder metallurgy (P/M) high temperature solid lubrication Ni-based composite

Supported carbon dots decorated with metallothionein for selective cadmium adsorption and removal

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2015年第12期26卷 1496-1501页

作者： Ting Yang yi-Kun li Ming-li Chen jian-Hua Wang Research Center for Analytical Sciences College of Sciences Northeastern University

Carbon dots are prepared and immobilized onto spherical SiO_2 through a one-step thermal oxidation and then decorated with metallothionein（MT）, a protein with high affinity towards thiophilic metals. The MT-carbon dots composites are characterized by means of FT-IR, SEM and TGA, giving rise to a MT loading amount of 823 μg g^（-1）. The adsorption of cadmium by the composites is a fast process and follows Langmuir model. In comparison with native SiO_2, a 2- and 2.4-folds improvement on the static and dynamic adsorption capacity of the composites for cadmium are obtained, respectively. Moreover,the adsorption efficiency is not affected by the presence of other metals. Finally, the composites are successfully applied for the removal of cadmium in a series of environmental water samples.

关键词： cadmium adsorbent spherical kinetics isotherms sorption breakthrough effluent alkaline sequential

KTI-RNN:Recognition of Heart Failure from Clinical Notes

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2023年第1期28卷 117-130页

作者： Dengao li Huiting Ma Wenjing li Baofeng Zhao Jumin Zhao yi liu jian Fu College of Data Science Taiyuan University of TechnologyJinzhong 030600China Department of Statistics and Applied Probability University of CaliforniaSanta BarbaraCA 93106USA College of Mining Engineering Taiyuan University of TechnologyTaiyuan 030024China College of Information and Computer Taiyuan University of TechnologyJinzhong 030600China

Although deep learning methods have recently attracted considerable attention in the medical field,analyzing large-scale electronic health record data is still a difficult *** particular,the accurate recognition of heart failure is a key technology for doctors to make reasonable treatment *** study uses data from the Medical Information Mart for Intensive Care *** with structured data,unstructured data contain abundant patient ***,this type of data has unsatisfactory characteristics,e.g.,many colloquial vocabularies and sparse *** solve these problems,we propose the KTI-RNN model for unstructured data *** proposed model overcomes sparse content and obtains good classification *** term frequency-inverse word frequency(TF-IWF)model is used to extract the keyword *** latent dirichlet allocation(LDA)model is adopted to extract the topic word *** models enable the expansion of the medical record text ***,we embed the global attention mechanism and gating mechanism between the bidirectional recurrent neural network(BiRNN)model and the output *** call it gated-attention-BiRNN(GA-BiRNN)and use it to identify heart failure from extensive medical *** show that the F 1 score of the proposed KTI-RNN model is 85.57%,and the accuracy rate of the proposed KTI-RNN model is 85.59%.

关键词： heart failure diagnosis text classification deep learning

A Refined Model of Three-roller Elastoplastic Asymmetrical Pre-bending of Plate

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

Journal of Iron and Steel Research International 2014年第3期21卷 328-334页

作者： Zhi-qiang ZHANG jian-li SONG jian-hua FU Yong-tang li yi-na GUO School of Material Science and Engineering Taiyuan University of Science and Technology

The geometry of plate after edge pre-bending mode is compared with that after roll-bending mode and the relationship among edge pre-bending angle, pre-bending edge length, and cylindrical desired radius is presented for a three-roller plate bender with bottom rollers adjustable horizontally. The analytical moment-curvature model and springhaek model for pure bending are established, assuming that the stress-strain relationship of material is linear, and the material is in plain strain and yields according to Mises yield criterion. The mathematical model for three- roller edge pre-bending of plate is developed considering the effect of pre-bending edge length, bottom roller radius, friction between plate and roller, etc. The plate tensile test and plate bending test are done and the numerical results agree well with the test data. The results are shown graphically and analyzed in the following aspects：（1） the error between numerical results and test data of top roiler force; （2） the influence of bottom roller radius, relative curva- ture, and bending arc length on springback angle; （3） the relationship between springhack ratio and edge pre-ben- ding angle.

关键词： plate~ elastoplastic~ three-roller edge pre-bending~ asymmetrizal bending~ springback

MATHEMATICAL SIMULATION OF NAVIGATION CHANNEL CHANGES IN THE FLUCTUATING BACKWATER REGION OF THE THREE GORGES RESERVOIR

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 1993年第2期5卷 63-68页

作者： li, yi-tian Xie, jian-heng Wu, Wei-ming Wuhan Univ of Hydraulic and Electric Engineering Wuhan China

In this paper, an one- and two-dimensional connected mathematical model is developed. The two-dimensional characteristics of flow and sediment transport are considered as much as possible in the model. The model is calibrated with field data and applied to simulate the river process of the fluctuating backwater region of the Three Gorges Reservoir. Some conclusions have been made based on the simulation results.

关键词： Channel flow Differential equations Mathematical models Rivers Sediment transport