检索结果-南通市图书馆

Effect of Ni content in Cu_(1-x)Ni_(x) coating on microstructure evolution and mechanical properties of W/Mo joint via low-temperature diffusion bonding

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19期54卷 171-180页

作者： mei rao Guoqiang Luo Jian Zhang Yiyu Wang Qiang Shen Lianmeng Zhang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTN37831-6064USA

The 93 W and Mo1 refractory metals were bonded with different Cu_(1-x)Ni_(x) coating interlayers of various Ni content using plasma-activated sintering at 700℃.The effects of the Ni content in the Cu_(1-x)Ni_(x) coating interlayer on the interfacial microstructure evolution and mechanical properties of the W/Mo joints were *** maximum average shear strength of the W/Mo joint was 316.5 MPa when the Ni content of the Cu_(1-x)Ni_(x) coating interlayer was 25%.When the Ni content of the Cu_(1-x)Ni_(x) coating interlayer was below 50%,the atomic diffusion at the W/Mo joint interface was adequate without the formation of intermetallic compounds,as demonstrated by the High Resolution Transmission Electron Microscope analyses of the *** presence of Ni in Cu_(1-x)Ni_(x) promoted diffusion bonding at the interface,which contributed to the high mechanical properties of the W/Mo *** an increase in the Ni content of the Cu_(1-x)Ni_(x) coating interlayer,the Mo Ni intermetallic compound(IMC)nucleated and grew at the Cu1-xNix coating/Mo1 *** the Ni content of the Cu_(1-x)Ni_(x) coating interlayer was above 50%,the generation of a brittle Mo Ni IMC weakened the shear strength of the W/Mo joint dramatically.

关键词： Refractory metal Cu_(1-x)Ni_(x)coating interlayer Solid solution MoNi IMC Microstructure Shear strength

Fabrication of High-power White LEDs and White Light Uniformity Testing

在线全文

学校读者我要写书评

暂无评论

Semiconductor Photonics and Technology 2007年第2期13卷 97-103页

作者： YU Xin-mei rao Hai-bo HU Yue LI Jun-fei HOU Bin School of Optoelectronic Information University of Electronic Science and Technology of China Chengdu 610054 CHN

As the blue and yellow lights are complementary colors, a blue InGaN LED chip is coated hy a yellow phosphor film to generate white light based on luminescence conversion mechanism. The emitted light of a blue LED is used as the primary source for exciting fluorescent material such as cerium doped yttrium aluminum garnet with the formula Y3Al2O12 ： Ce^3＋（in short： YAG ： Ce^3＋）. The matching of the spectrum of the blue LED chips and the YAG ： Ce^3＋ yellow phosphor is studied to improve the conversion efficiency. The packaging methods and manufacturing processes for high power single chip-white LEDs are introduced. The uniformity of the output white light is investigated. Based on the characteristics of the high power white LEDs, some approaches and processes are suggested to improve the light uniformity when they are fabricated. The effectiveness of those approaches on the improvement of LEDs is discussed in detail and some interesting conclusions are also presented.

关键词： solid state lighting high-power white LED packaging phosphor layer matching uniformity

Superconducting Magnet of the Gyrotron for HL-2A ECRH System

在线全文

学校读者我要写书评

暂无评论

Southwestern Institute of Physics Annual Report

Southwestern Institute of Physics Annual Report 2005年第1期 60-62页

作者： HUANG mei KANG Zihua rao Jun FENG Kun ZHANG Jinsong LEI Jianxin

In order to carry on ECRH experiments and research on HL-2A tokamak, two sets of 4 mm gyrotrons were imported from GYCOM. Each of them has a superconducting magnet system to offer a required magnetic field configuration. In gyrotron, a strong magnetic field is necessary for electron beam to satisfy the electron cyclotron resonance condition and to excite one the eigemodes in the cavity. Its functions are：（I） to make electrons gyrate, （ 2 ） to offer enough adiabatic compression value to make electrons acquire strong transverse energy. During the period of adjustment, magnetic field distribution was measured. Meanwhile, operating current of superconducting magnet and operating frequency of gyrotron were determined.

关键词： Superconducting magnet Operating current Power

Single-center retrospective study of the diagnostic value of doubleballoon enteroscopy in Meckel’s diverticulum with bleeding

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

World Journal of Gastrointestinal Surgery 2024年第4期16卷 1043-1054页

作者： Tian He Chao Yang Jing Wang Ji-Sheng Zhong Ai-Hua Li Ya-Jing Yin Li-Ling Luo Chun-mei rao Nian-Fen Mao Qiang Guo Zan Zuo Wen Zhang Ping Wan Yunnan Digestive Endoscopy Clinical Medical Center Department of GastroenterologyThe First People’s Hospital of Yunnan ProvinceThe Affiliated Hospital of Kunming University of Science and TechnologyKunming 650032Yunnan ProvinceChina Department of Medicine Kunming University of Science and TechnologyKunming 650093Yunnan ProvinceChina School of Medicine Yunnan University of Traditional Chinese MedicineKunming 650011Yunnan ProvinceChina Department of Gastroenterology Qujing Hospital of Traditional Chinese MedicineQujing 655000Yunnan ProvinceChina Department of Gastroenterology Yunnan University of Traditional Chinese MedicineKunming 650011Yunnan ProvinceChina

BACKGROUND The study aimed to analyze the characteristic clinical manifestations of patients with intestinal disease Meckel’s diverticulum(MD)complicated by digestive tract ***,we aimed to evaluate the value of double-balloon enteroscopy(DBE)in MD diagnosis and the prognosis after laparoscopic diverticula *** To evaluate the value of DBE in the diagnosis and the prognosis after laparoscopic diverticula resection for MD with *** The study retrospectively analyzed relevant data from 84 MD patients treated between January 2015 and March 2022 and recorded their clinical manifestations,auxiliary examination,and follow-up after laparoscopic resection of ***(1)Among 84 MD patients complicated with hemorrhage,77 were male,and 7 were female with an average age of 31.31±10.75 *** incidence was higher in men than in women of different ages;(2)Among the 84 MD patients,65(78.40%)had defecated dark red stools,and 50(58.80%)had no accompanying symptoms during bleeding,indicating that most MD bleeding appeared a dark red stool without accompanying symptoms;(3)The shock index of 71 patients(85.20%)was30%;(4)The DBE-positive rate was 100%(54/54),99mTcpertechnetate-positive scanning rate was 78%(35/45)compared with capsule endoscopy(36%)and small intestine computed tomography(19%).These results suggest that DBE and 99mTc-pertechnetate scans had significant advantages in diagnosing MD and bleeding,especially DBE was a highly precise examination method in MD diagnosis;(5)A total of 54 MD patients with hemorrhage underwent DBE examination before *** endoscopy revealed many mucosal manifestations including normal appearance,inflammatory changes,ulcerative changes,diverticulum inversion,and nodular hyperplasia,with ulcerative changes being the most common(53.70%).This suggests that diverticular mucosal u

关键词： Meckel’s diverticulum with bleeding Double-balloon colonoscopy 99mTc-pertechnetate scanning Capsule endoscopy Ectopic gastric mucosa

Nomogram to predict primary non-response to infliximab in patients with Crohn’s disease:a multicenter study

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

Gastroenterology Report 2021年第4期9卷 329-338,I0002页

作者： Xiao-Qi Ye Jing Cai Qiao Yu Xiao-Cang Cao Yan Chen mei-Xin rao Bai-Li Chen Yao He Zhi-Rong Zeng Hao Chen Yi-Mou Lin Qian Cao Min-Hu Chen Sheng-Hong Zhang Department of Gastroenterology The First Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China Department of Gastroenterology Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouZhejiangP.R.China Department of Gastroenterology Wenzhou Central HospitalWenzhouZhejiangP.R.China Department of Gastroenterology the Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiangP.R.China Department of Gastroenterology Tianjin Medical University General HospitalTianjinP.R.China

Background:Infliximab(IFX)is effective at inducing and maintaining clinical remission and mucosal healing in patients with Crohn’s disease(CD);however,9%–40%of patients do not respond to primary IFX *** study aimed to construct and validate nomograms to predict IFX response in CD ***:A total of 343 patients diagnosed with CD who had received IFX induction from four tertiary centers between September 2008 and September 2019 were enrolled in this study and randomly classified into a training cohort(n=240)and a validation cohort(n=103).The primary outcome was primary non-response(PNR)and the secondary outcome was mucosal healing(MH).Nomograms were constructed from the training cohort using multivariate logistic *** of nomograms was evaluated by area under the receiver-operating characteristic curve(AUC)and calibration *** clinical usefulness of nomograms was evaluated by decision-curve ***:The nomogram for PNR was developed based on four independent predictors:age,C-reactive protein(CRP)at week 2,body mass index,and non-stricturing,non-penetrating behavior(B1).AUC was 0.77 in the training cohort and 0.76 in the validation *** nomogram for MH included four independent factors:baseline Crohn’s Disease Endoscopic Index of Severity,CRP at week 2,B1,and disease *** was 0.79 and 0.72 in the training and validation cohorts,*** two nomograms showed good calibration in both cohorts and were superior to single factors and an existing matrix *** decision curve indicated the clinical usefulness of the PNR ***:We established and validated nomograms for the prediction of PNR to IFX and MH in CD *** graphical tool is easy to use and will assist physicians in therapeutic decision-making.

关键词： Crohn’s disease infliximab nomogram primary non-response mucosal healing

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

再生骨料混凝土变形性能和耐久性能研究综述

公路 2009年第10期54卷 181-184页

作者：刘数华饶美娟武汉大学水资源与水电工程科学国家重点实验室武汉市430072

再生混凝土的变形性能主要包括弹性行为、干缩与徐变、温度变形性能,再生混凝土的耐久性包括渗透性、抗冻耐久性和抗化学侵蚀性能。对再生混凝土的变形性能和耐久性能进行深入分析,揭示再生骨料对再生混凝土变形性能和耐久性能的影响规律。

关键词：再生骨料混凝土再生骨料变形性能耐久性能

铜绿假单胞菌群体感应系统抗菌增效机制研究进展

在线全文

学校读者我要写书评

暂无评论

中国感染与化疗杂志 2019年第5期19卷 578-583页

作者：饶媚张素平史道华福建医科大学附属龙岩第一医院药剂科临床药学室福建龙岩364000 福建省龙岩市第二医院药剂科临床药学室福建医科大学附属福建省妇幼保健院药剂科

铜绿假单胞菌(Pseudomonas aeruginosa)是引起医院感染的主要病原菌之一,对多种抗感染药物呈固有或获得性多药耐药,常导致治疗失败,严重威胁人类健康。研发新型、安全、有效的抗菌药物或引入能中和或阻断细菌毒素产生、调控群体感应药物... 详细信息

铜绿假单胞菌(Pseudomonas aeruginosa)是引起医院感染的主要病原菌之一,对多种抗感染药物呈固有或获得性多药耐药,常导致治疗失败,严重威胁人类健康。研发新型、安全、有效的抗菌药物或引入能中和或阻断细菌毒素产生、调控群体感应药物,疫苗,联用抗菌增效剂等非抗生素类药物辅助抗感染,一直备受关注[1]。

关键词：铜绿假单胞菌群体感应系统群体感应抑制剂抗菌增效

高铁低钙硅酸盐水泥体系的抗氯离子侵蚀性能研究

在线全文

学校读者我要写书评

暂无评论

硅酸盐通报 2018年第10期37卷 3136-3140页

作者：朱明曾浪饶美娟武汉理工大学硅酸盐建筑材料国家重点实验室武汉430070

为了改善水泥基材料的抗氯离子侵蚀性能,提出高铁低钙硅酸盐水泥体系[C4AF≥18%,C3S≤50%,层状双氢氧化物材料(LDHs)]。分别制备了矿相组成为(18%C4AF,50%C3S)及(20%C4AF,48%C3S)的高铁低钙水泥熟料,探讨了高铁低钙水泥熟料的烧成制度... 详细信息

为了改善水泥基材料的抗氯离子侵蚀性能,提出高铁低钙硅酸盐水泥体系[C4AF≥18%,C3S≤50%,层状双氢氧化物材料(LDHs)]。分别制备了矿相组成为(18%C4AF,50%C3S)及(20%C4AF,48%C3S)的高铁低钙水泥熟料,探讨了高铁低钙水泥熟料的烧成制度和材料特性;测试了硬化高铁低钙水泥浆体的3、7、28 d抗压强度及28 d氯离子扩散系数,研究了0%～8%掺量的LDHs对高铁低钙水泥体系的力学性能及抗氯离子侵蚀能力的影响。结果表明,C4AF含量为20%的高铁低钙水泥熟料比C4AF含量为18%的高铁低钙水泥熟料的结晶度高;掺LDHs的高铁低钙水泥基材料的3 d和7 d强度有所提高,当掺量为2%时强度达到最大;高铁低钙水泥体系通过提高水泥熟料中的铁相含量、降低硅酸三钙含量、引入具有离子固化能力的LDHs,显著改善了其抗氯离子侵蚀性能,当LDHs掺量为4%时,高铁低钙水泥基材料抗氯离子侵蚀能力最强。

关键词：高铁低钙水泥 LDHs材料氯离子早期强度

替勃龙与尼尔雌醇治疗绝经后更年期症状临床疗效比较

在线全文

学校读者我要写书评

暂无评论

中国妇幼保健 2009年第33期24卷 4715-4716页

作者：饶梅冬严丽新疆乌鲁木齐市妇幼保健院妇产科 830001

目的:比较替勃龙(2.5mg/片)和尼尔雌醇(2mg/片)治疗绝经后妇女更年期症状的疗效及其对脂代谢、雌激素水平、子宫内膜和乳腺的影响。方法:将87例更年期患者随机分为替勃龙组(2.5mg/次,1次/日)和尼尔雌醇组(2mg/次,1次/2周)治疗6个月,记... 详细信息

目的:比较替勃龙(2.5mg/片)和尼尔雌醇(2mg/片)治疗绝经后妇女更年期症状的疗效及其对脂代谢、雌激素水平、子宫内膜和乳腺的影响。方法:将87例更年期患者随机分为替勃龙组(2.5mg/次,1次/日)和尼尔雌醇组(2mg/次,1次/2周)治疗6个月,记录两组临床症状的变化及不良反应,测定治疗前后甘油三酯(TG)、低密度脂蛋白(LDL)、高密度脂蛋白(HDL)及血清雌二醇(E2)水平,B超监测乳腺及测量子宫内膜厚度。结果:①两组方面在缓解潮热、盗汗、心悸、失眠、尿频及阴道干涩症状方面差异无统计学意义,在缓解腰背痛、功能性消化不良症状、抑郁等精神症状方面差异有统计学意义。②两组治疗前后TG、LDL、E2水平差异均无统计学意义,HDL水平治疗后均较治疗前显著上升,P<0.05。③治疗前后子宫内膜和乳腺体层厚度的变化两组间差异无统计学意义。结论:替勃龙和尼尔雌醇治疗6个月均能有效改善女性绝经后更年期症状,对脂代谢和雌激素水平无不良影响,亦未显示对子宫内膜和乳腺产生不良影响。替勃龙临床综合疗效优于尼尔雌醇,不良反应的发生率低。

关键词：替勃龙尼尔雌醇绝经后期更年期症状安全性