检索结果-南通市图书馆

A review of late-stage tungsten fuzz growth

在线全文

学校读者我要写书评

暂无评论

Tungsten 2022年第3期4卷 184-193页

作者： Jacob A.R.wright Department of Materials Science and Metallurgy University of CambridgeCambridgeCB30FSUK

Tungsten will be used as the plasma-facing divertor material in the International Thermonuclear Experimental Reactor(ITER)fusion *** high temperatures and high ion fluxes,a‘fuzz’nanostructure forms on the tungsten surface with dramatically different properties and could contaminate the *** simulations and experimental observations have provided understanding of the initial fuzz formation process,there is debate over whether tungsten or helium migration is rate-limiting during late-stage growth,and the mechanisms by which tungsten and helium migrations ***,the proposed mechanisms are considered in *** is concluded that tungsten migration occurs by adatom diffusion along the fuzz *** helium migration through the porous fuzz to the tungsten bulk is also required for fuzz growth,for continued bubble growth and *** likely migrates due to ballistic penetration,although diffusion may *** is difficult to determine the limiting process,which may switch from helium penetration to tungsten adatom diffusion above a threshold *** for further research to clarify the mechanisms are then considered.A greater understanding of the fuzz formation mechanism is key to the successful design of plasma-facing tungsten components,and may have applications in forming porous tungsten catalysts.

关键词： Tungsten Tungsten fuzz Plasma-material interactions Fusion reactors

强化与标准血压控制对痴呆的影响:随机临床试验

在线全文

学校读者我要写书评

暂无评论

中华高血压杂志 2019年第4期27卷 367-367页

作者：刘青叶鹏 Williamson JD Pajewski NM Auchus AP Bryan RN Chelune G Cheung AK Cleveland ML Coker LH Crowe MG Cushman WC Cutler JA Davatzikos C Desiderio L Erus G Fine LJ Gaussoin SA Harris D Hsieh MK Johnson KC Kimmel PL Tamura MK Launer LJ Lerner AJ Lewis CE Martindale-Adams J Moy CS Nasrallah IM Nichols LO Oparil S Ogrocki PK Rahman M Rapp SR Reboussin DM Rocco MV Sachs BC Sink KM Still CH Supiano MA Snyder JK Wadley VG Walker J Weiner DE Whelton PK Wilson VM Woolard N wright JT Jr wright cb SPRINT MIND investigators for theSPRINT research group

目前还没有有效的治疗方法来降低轻度认知障碍和痴呆的风险。该文旨在探讨强化血压控制对老年痴呆风险的影响。研究人员在美国和波多黎各102个地点对年龄≥50岁有高血压但无糖尿病或脑卒中史的成人进行随机临床试验。于2010年11月8日开... 详细信息

目前还没有有效的治疗方法来降低轻度认知障碍和痴呆的风险。该文旨在探讨强化血压控制对老年痴呆风险的影响。研究人员在美国和波多黎各102个地点对年龄≥50岁有高血压但无糖尿病或脑卒中史的成人进行随机临床试验。于2010年11月8日开始,于2015年8月20日提前停止,获得其主要观察指标(复合心血管事件)和全因死亡率的数据。认知观察指标随访的最后日期为2018年7月22日。

关键词：随机临床试验老年痴呆血压控制轻度认知障碍标准心血管事件治疗方法研究人员

The efficacy and effectiveness of machine learning for weaning in mechanically ventilated patients at the intensive care unit: a systematic review

在线全文

学校读者我要写书评

暂无评论

Bio-Design and Manufacturing 2019年第1期2卷 31-40页

作者： Man Ting Kwong Glen wright Colopy Anika M.Weber Ari Ercole Jeroen H.M.Bergmann Department of Engineering Science University of OxfordParks Road. Oxford OXI 3PJ. UK snap40 Inc.125 Princess Street Edinburgh EH2 4AD UK CRUK/MRC Oxford Institute for Radiation Oncology.Roosevelt Drive Oxford OX3 7DQ. UK Division of Anaesthesia Addenbrooke's Hospital University of Cambridge Hills Road Cambridge CB2 0QQ. UK

Weani ng from mechanical ventilation in the in tensive care unit (ICU) is a complex clinical problem and relevant for future organ engineering. Prolonged mechanical ventilation (MV) leads to a range of medical complications that increases length of stay and costs as well as contributes to morbidity and even mortality and long-term quality of life. The need to reduce MV is both clinical and economical. Artificial intelligence or machine learning (ML) methods are promising opportunities to positively influence patient outcomes. ML methods have been proposed to enhance clinical decisions processes by using the large amount of digital information generated in the ICU setting. There is a particular interest in empirical methods (such as ML) to improve management of "difficult-to-wean" patients, due to the associated costs and adverse events associated with this population. A systematic literature search was performed using the OVID, IEEEXplore, PubMed, and Web of Science databases. All publications that included (1) the application of ML to weaning from MV in the ICU and (2) a clinical outcome measurement were reviewed. A checklist to assess the study quality of medical ML publications was modified to suit the critical assessment of ML in MV weaning literature. The systematic search identified nine studies that used ML for weaning management from MV in critical care. The weaning management application areas included (1) prediction of successful spontaneous breathing trials (SBTs),(2) prediction of successful extubation,(3) prediction of arterial blood gases, and (4) ventilator setting and oxygenation-adjustment advisory systems. Seven of the nine studies scored seven out of eight on the quality index. The remaining two of the nine studies scored one out of eight on the quality index. This scoring may, in part, be explained by the publications' focus on technical novelty, and therefore focusing on issues most important to a technical audience, instead of issues most impor

关键词： Artificial intelligence Patient-centred medicine Clinical trial Critical care Data science

Surface modification by graphene oxide:An efficient strategy to improve the performance of activated carbon based supercapacitors

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2017年第12期28卷 2285-2289页

作者： Weishi Du Yaokang Lv Hongliang Lu Zaihua Chen Dominic S.wright Cheng Zhang College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China Department of Chemistry University of CambridgeCambridge CB21EWUnited Kingdom State Key Laboratory of-ASIC and System Institute of Advanced NanodevicesSchool-of MicroelectronicsFudan UniversityShanghai 200433China Zhejiang Forasen Energy Technology Co. Shuige Industrial EstateLishui 323000China

We demonstrate an efficient and cost-effective strategy to improve electrochemical properties of AC based electrode materials. A series of graphene oxide （GO）-modified activated carbon （AC） composites （GO@ACs） have been prepared as electrode materials for supercapacitors （SCs）. In GO@ACs, AC particles anchored on the surface of GO sheets which were synchronously reduced during charge/discharge process, and formed a 3D-conductive network. Electrochemical analyses revealed that 2.5 wt% GO@AC, which exhibited improved electrical conductivity and high specific capacitance at large current density in organic electrolyte, is a promising electrode material for high-performance SCs. At 6A/g, the specific capacitance of 2.5 wt% GO@AC increased by 249,5% in comparison with that of AC.

关键词： Electrode materials Activated carbon Graphene oxide Supercapacitor