检索结果-南通市图书馆

基于肿瘤生长速率的LI-rADS生长阈值可提高≤3.0 cm肝细胞癌的诊断效能

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2024年第2期 255-255页

作者： B.jeong S.j.Choi S.H.Choi H.j.jang j.H.Byun H.j.Won 侯唯姝

摘要目的尽管2018版肝脏成像报告和数据系统（LIrADS）对肝脏病变的生长阈值（TG）进行了修订，但确定TG的2次检查之间的适当时间段尚未确定。该研究比较了基于

关键词：

A blue luminescence glass-ceramics of Eu^(2+) ions activated Li_2O-BaO-B_2O_3

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

journal of rare Earths 2008年第2期26卷 215-219页

作者：黄彦林 Eunjin Cho Kiwan jang Ho Sueb Lee 王锡钢秦大可姜传芳 School of Material Engineering Soochow University Department of Physics Changwon National University Changwon 641-773 Repub- lic of Korea

New blue luminescence glass-ceramic samples were prepared in air by annealing of the Eu^3＋-doped Li2O-BaO-B2O3 glass. The as-made glass samples only showed the sharp emission peaks assigned to the transitions of 5^D0-7^Fj （j=0, 1, 2, 3, 4） of Eu^3＋ ions. The glass-ceramic samples gave a strong and broad emission band peaking at about 382 nm ascribed to the 5d-4f transition of Eu^2＋ ions. The optical properties such as excitation and emission spectra, and the decay time of the Eu^2＋ ions were investigated in the glasses or the glass-ceramics samples. The X-ray diffraction pattern showed that LiBan9O15 might be demonstrated to be the crystallites in the glass-ceramic, which contributed to the blue luminescence. SEM micrograph was investigated on the glass-ceramic samples obtained by crystallization of the glass matrix resulting in a mixture of poly-crystals.

关键词： glass-ceramics europium optical materials luminescence rare earths

Advent of torsional optomechanics from Beth’s legacy

在线全文

学校读者我要写书评

暂无评论

Advanced Photonics 2023年第4期5卷 3-4页

作者： jaehyuck jang jungho Mun junsuk rho Pohang University of Science and Technology(POSTECH) Department of Chemical EngineeringPohangRepublic of Korea Pohang University of Science and Technology(POSTECH) Department of Mechanical EngineeringPohangRepublic of Korea POSCO-POSTECH-rIST Convergence research Center for Flat Optics and Metaphotonics PohangRepublic of Korea

Torsional optomechanics,which involves the transfer of angular mo-mentum from light to matter,has been a vibrant research area since Beth’s pioneering contribution in *** proposed a method to measure the transfer of spin angular momentum using a torsional pen-dulum,1 laying the foundation for classical and quantum optomechanics related to particle levitation,trapping,and cooling in modern optics.

关键词： angular optics momentum

Application of powdered activated carbon coating to fabrics in a hybrid filter to enhance mercury removal

在线全文

学校读者我要写书评

暂无评论

journal of Environmental Sciences 2019年第6期31卷 58-65页

作者： jin-Ho Sung Seung-Ki Back Eun-Song Lee Ha-Na jang Yong-Chil Seo Youn-Suk Kang Myong-Hwa Lee Department of Environmental Engineering Yonsei University j-E Tech Co. Ltd Department of Environmental Engineering Kangwon National University

Elemental mercury(Hg0) is predominant constituent of flue gas emitted from coal-fired power plants. Adsorption has been considered the best available technology for removal of Hg0 from flue gas. However, adsorbent injection increases the amount of ash generated. In the present study, powdered activated carbon(PAC) was coated on polytetrafluoroethylene/glass fiber filters to increase Hg0 removal while concurrently reducing the amount of ash generated. The optimal PAC coating rate was determined in laboratory experiments to ensure better Hg0 removal with low pressure drop. When PAC of particle size less than 45 μm was used, and the areal density was 50 g/m2, the pressure drop remained under 30 Pa while the Hg0 removal efficiency increased to 15.8% from4.3%. The Hg0 removal efficiency also increased with decrease in filtration velocity. The optimal PAC coating rate was applied on a hybrid filter(HF), which was combined with a bag filter and an electrostatic precipitator in a single chamber. Originally designed to remove fine particulates matter, it was retrofitted to the flue gas control device for simultaneous Hg0 removal. By employing the PAC coating, the Hg removal efficiency of the HF increased to 79.79% from 66.35%. Also, a temporary reduction in Hg removal was seen but this was resolved following a cleaning cycle in which the dust layer was removed.

关键词： Mercury Hybrid filter Activated carbon Coating filter Coal-fired power plant

Adaptive Parallel Computation for Blind Source Separation with Systolic Architecture

在线全文

学校读者我要写书评

暂无评论

Intelligent Information Management 2010年第1期2卷 46-52页

作者： H. jEONG Y. KIM H. j. jang 不详

The purpose of Blind Source Separation (BSS) is to obtain separated sources from convolutive mixture inputs. Among the various available BSS methods, Independent Component Analysis (ICA) is one of the representative methods. Its key idea is to repetitively update and calculate the measures. However, dealing with the measures obtained from multi-array sensors causes obstacles for real-time use. In order to solve this problem, it is necessary to convert the software implementation of BSS algorithm into the hardware architecture. Through the use of hardware architecture, the BSS algorithm can efficiently work within a relatively short time. In this study, we investigate a practical method using a parallel algorithm and architecture for hardware use in a blind source separation. We design a feedback network for real-time speech signal processing. The network is composed of forward and updates algorithms. The architecture of the network is systolic and therefore it is suitable for parallel processing. We only have to add and connect modules for scaling. This paper covers the process from the systolic design of BSS to the hardware implementation using Xilinx FPGAs. The simulation results of our proposed implementation are also represented in the experimental section. In that section, our architecture returns satisfying results with robust qualities.

关键词： BSS convolutive mixtures VLSI field programmable gate array (FPGA)

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

β-谷甾醇改善绝经后骨质疏松的实验研究

浙江中医药大学学报 2024年第2期48卷 131-137,146页

作者：姜耘宙汪正明王瑞项思成金钊锴童培建吕帅洁浙江中医药大学附属金华中医院浙江金华321017 上海中医药大学附属曙光医院浙江中医药大学浙江中医药大学附属第一医院(浙江省中医院)

[目的]探究杜仲有效单体成分β-谷甾醇对小鼠绝经后骨质疏松的疗效及其潜在作用机制。[方法]将24只12周龄雌性C57BL/6j小鼠随机分为假手术组、模型组及β-谷甾醇干预组,每组8只,采用双侧卵巢切除术建立绝经后骨质疏松模型,术后假手术组... 详细信息

[目的]探究杜仲有效单体成分β-谷甾醇对小鼠绝经后骨质疏松的疗效及其潜在作用机制。[方法]将24只12周龄雌性C57BL/6j小鼠随机分为假手术组、模型组及β-谷甾醇干预组,每组8只,采用双侧卵巢切除术建立绝经后骨质疏松模型,术后假手术组及模型组给予0.9%氯化钠溶液灌胃,β-谷甾醇干预组给予β-谷甾醇灌胃,术后8周将各组小鼠处死取材,借助显微计算机断层扫描(micro-computed tomography,Micro-CT)观察β-谷甾醇干预对绝经后骨量丢失及骨小梁破坏的保护作用,并采用苏木素-伊红(hematoxylin-eosin,HE)染色对小鼠股骨远端区域进行组织形态学分析,同时通过抗酒石酸酸性磷酸酶(tartrate-resistant acid phosphatase,TrAP)染色及碱性磷酸酶(alkaline phosphatase,ALP)染色评估小鼠骨吸收与骨形成情况,并通过免疫组化检测各组样本的β-catenin表达水平。[结果]Micro-CT扫描结果显示,β-谷甾醇干预可减少绝经后骨量丢失及骨微结构破坏,HE染色证实β-谷甾醇可有效维持骨小梁数目及组织形态,并在一定程度上抑制雌激素缺乏引起的异常脂肪堆积现象。TrAP染色结果表明,β-谷甾醇并不影响破骨细胞形成,而免疫组化结果表明β-谷甾醇可显著促进成骨标志物ALP的表达。与此同时,β-谷甾醇可增加β-catenin在股骨远端区域的表达,提示β-谷甾醇促进骨形成,可能与其上调β-catenin信号通路有关。[结论]β-谷甾醇体内干预可上调β-catenin信号通路,增强成骨分化,促进机体骨形成,从而改善绝经后骨质疏松。

关键词：绝经后骨质疏松症 β-谷甾醇杜仲骨形成成骨细胞 β-catenin

在线全文

学校读者我要写书评

暂无评论

癸酸基相变材料的制备及性能研究

塑料科技 2024年第4期52卷 28-32页

作者：杨迪思芳车秋凌代阿瑞杨敏鸽姜凤阳叶根根王俊勃西安工程大学材料工程学院陕西西安710048 安踏(中国)有限公司福建晋江362212 陕西鼎新汇智功能材料科技有限公司陕西西安710048

目前智能调温织物存在温度范围窄、价格昂贵、稳定性不足等问题。为解决此问题,文章采用物理共混的方法制备癸酸/聚甲基丙烯酸甲酯(CA/PMMA)和癸酸/聚乙烯醇(CA/PVA)低温相变材料。采用差示扫描量热法、导热系数测定仪、傅里叶红外光谱... 详细信息

目前智能调温织物存在温度范围窄、价格昂贵、稳定性不足等问题。为解决此问题,文章采用物理共混的方法制备癸酸/聚甲基丙烯酸甲酯(CA/PMMA)和癸酸/聚乙烯醇(CA/PVA)低温相变材料。采用差示扫描量热法、导热系数测定仪、傅里叶红外光谱分析仪、同步热重分析仪对相变材料的储热性能、导热系数、化学结构、热稳定性进行表征。结果表明:CA含量为80%的CA/PVA低温相变材料综合性能较好,其相变温度为29.69℃,相变潜热为325.40 j/g,导热系数为0.8154 W/(m·K)。PVA和PMMA的加入促进了CA基相变材料的界面相容性,使其相变材料的缺陷和界面空隙相对较多,热量传递效率较快,有效提高了导热性能。PVA和PMMA的包覆延缓了燃烧界面以外的热量和氧气向材料内部迁移的速度,起到隔热作用,同时也提高了相变材料的热稳定性。

关键词：癸酸甲基丙烯酸甲酯聚乙烯醇低温相变材料

常规腹部和胸部CT的机会性骨质疏松筛查:超过2万成人的正常L1骨小梁CT值

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2019年第4期 479-480页

作者：梁译丹 S.jang P.M.Graffy T.j.Ziemlewicz S.j.Lee r.M.Summers P.j.Pickhardt Department of radiology University of Wisconsin School of Medicine and Public Health E3/311 Clinical Science Center

摘要目的确定成人第一腰椎(L1)骨小梁CT值的参考范围,在常规CT上测量骨密度(BMD)。材料与方法收集120 kV条件下进行的20 374次腹部和/或胸部的成人CT检

关键词：骨质疏松骨小梁 CT L1

影像组学结合常规临床和遗传预测模型可提高胶质母细胞瘤病人的生存预测价值

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2021年第3期44卷 370-370页

作者： Y.Choi Y.Nam j.jang N.Y.Shin Y.S.Lee K.j.Ahn 郝峰峰

摘要目的探讨基于Mr多参数影像组学联合常规临床和遗传预测因素对胶质母细胞瘤病人的额外预测价值。方法在本项单中心研究中,对2007年10月—2019年12月

关键词：