As the number of diagnostic and therapeutic gastrointestinal endoscopies is increasing, and there is an increase in number of patients taking blood thinners, we are seeing more and more patients on blood thinners prio...As the number of diagnostic and therapeutic gastrointestinal endoscopies is increasing, and there is an increase in number of patients taking blood thinners, we are seeing more and more patients on blood thinners prior to endoscopic procedures. Gastrointestinal bleeding or thromboembolism can occur in this category of patients in the periendoscopic period. To better manage these patients, endoscopists should have a clear concept about the various blood thinners in the market. Patients' risk of thromboembolism off anticoagulation, and the risk of bleeding from endoscopic procedures should be assessed prior to endoscopy. The endoscopic procedure should be done when it is safe to do it.展开更多
n-type CZ-Si wafers featuring longer minority carrier lifetime and higher tolerance of certain metal contamination can offer one of the best Si-based solar cells. In this study, Si heterojuction （SHJ） solar cells wh...n-type CZ-Si wafers featuring longer minority carrier lifetime and higher tolerance of certain metal contamination can offer one of the best Si-based solar cells. In this study, Si heterojuction （SHJ） solar cells which was fabricated with different wafers in the top, middle and tail positions of the ingot, exhibited a stable high efficiency of〉 22% in spite of the various profiles of the resistivity and lifetime, which demonstrated the high material utilization of n-type ingot. In addition, for effectively converting the sunlight into electrical power, the pyramid size, pyramid density and roughness of surface of the Cz-Si wafer were investigated by scanning electron microscope （SEM） and transmission electron microscope （TEM）. Furthermore, the dependence of SHJ solar cell open- circuit voltage on the surface topography was discussed, which indicated that the uniformity of surface pyramid helps to improve the open-circuit voltage and conversion efficiency. Moreover, the simulation revealed that the highest efficiency of the SHJ solar cell could be achieved by the wafer with a thickness of 100 μm. Fortunately, over 23% of the conversion efficiency of the SHJ solar cell with a wafer thickness of 100 μm was obtained based on the systematic optimization of cell fabrication process in the pilot production line. Evidently, the large availability of both n-type ingot and thinner wafer strongly supported the lower cost fabrication of high efficiency SHJ solar cell.展开更多
As they say in Hangzhou,'Leifeng Pagoda is like an old monk,and Baochu Pagoda is like a beautiful woman(雷峰如老衲,保如美人).'Leifeng Pagoda(above)can be found south of Hangzhou’s famous West Lake,and the thi...As they say in Hangzhou,'Leifeng Pagoda is like an old monk,and Baochu Pagoda is like a beautiful woman(雷峰如老衲,保如美人).'Leifeng Pagoda(above)can be found south of Hangzhou’s famous West Lake,and the thinner Baochu Pagoda is located north of West Lake atop BaosHill.Both were originally builin the tenth century.展开更多
话题是人们的体形。市面上琳琅满目的减肥药物和运动器械折射出人们“喜瘦怕胖”的心态。可有些人怎么减肥也收效不大,于是对药物减肥法产生怀疑,相继提出了“运动减肥论”和“基因决定论”,在以上各家争执不下时,本文却另辟蹊径,提出...话题是人们的体形。市面上琳琅满目的减肥药物和运动器械折射出人们“喜瘦怕胖”的心态。可有些人怎么减肥也收效不大,于是对药物减肥法产生怀疑,相继提出了“运动减肥论”和“基因决定论”,在以上各家争执不下时,本文却另辟蹊径,提出了“非锻炼性运动产热减肥论”。这个拗口的名字来源于non-exercise actvity thermogenesis.简称NEAT。文章特别强调,这种运动不同于一般的体育运动,而是如题目所言的little daily habits,象 fidgeting, stretching, toe-tapping等。不要以为这些“小动作”不起眼,据科学实验.NEAT proved to be theprincipal mediator of resistance to fat gain with overfeeding。其作用竟然大大超过另外三种耗能方式(详见下文)。包括体育运动。最后的结论是:…higherlevels of fidgeting and other non-exercise movements may be a key factor indetermining which of us gain weight easily。 遗憾的是连专家们也弄不清这种消耗能量的方式为什么会有个体差异,但全文从头至尾似于一直在暗示读者:NEAT并非先天注定,而是可以逐步培养的习惯。那么,受身体发福困扰的朋友不妨拿出一点决心和恒心,试试这些“小动作”。展开更多
文摘As the number of diagnostic and therapeutic gastrointestinal endoscopies is increasing, and there is an increase in number of patients taking blood thinners, we are seeing more and more patients on blood thinners prior to endoscopic procedures. Gastrointestinal bleeding or thromboembolism can occur in this category of patients in the periendoscopic period. To better manage these patients, endoscopists should have a clear concept about the various blood thinners in the market. Patients' risk of thromboembolism off anticoagulation, and the risk of bleeding from endoscopic procedures should be assessed prior to endoscopy. The endoscopic procedure should be done when it is safe to do it.
文摘n-type CZ-Si wafers featuring longer minority carrier lifetime and higher tolerance of certain metal contamination can offer one of the best Si-based solar cells. In this study, Si heterojuction （SHJ） solar cells which was fabricated with different wafers in the top, middle and tail positions of the ingot, exhibited a stable high efficiency of〉 22% in spite of the various profiles of the resistivity and lifetime, which demonstrated the high material utilization of n-type ingot. In addition, for effectively converting the sunlight into electrical power, the pyramid size, pyramid density and roughness of surface of the Cz-Si wafer were investigated by scanning electron microscope （SEM） and transmission electron microscope （TEM）. Furthermore, the dependence of SHJ solar cell open- circuit voltage on the surface topography was discussed, which indicated that the uniformity of surface pyramid helps to improve the open-circuit voltage and conversion efficiency. Moreover, the simulation revealed that the highest efficiency of the SHJ solar cell could be achieved by the wafer with a thickness of 100 μm. Fortunately, over 23% of the conversion efficiency of the SHJ solar cell with a wafer thickness of 100 μm was obtained based on the systematic optimization of cell fabrication process in the pilot production line. Evidently, the large availability of both n-type ingot and thinner wafer strongly supported the lower cost fabrication of high efficiency SHJ solar cell.
文摘As they say in Hangzhou,'Leifeng Pagoda is like an old monk,and Baochu Pagoda is like a beautiful woman(雷峰如老衲,保如美人).'Leifeng Pagoda(above)can be found south of Hangzhou’s famous West Lake,and the thinner Baochu Pagoda is located north of West Lake atop BaosHill.Both were originally builin the tenth century.
文摘话题是人们的体形。市面上琳琅满目的减肥药物和运动器械折射出人们“喜瘦怕胖”的心态。可有些人怎么减肥也收效不大,于是对药物减肥法产生怀疑,相继提出了“运动减肥论”和“基因决定论”,在以上各家争执不下时,本文却另辟蹊径,提出了“非锻炼性运动产热减肥论”。这个拗口的名字来源于non-exercise actvity thermogenesis.简称NEAT。文章特别强调,这种运动不同于一般的体育运动,而是如题目所言的little daily habits,象 fidgeting, stretching, toe-tapping等。不要以为这些“小动作”不起眼,据科学实验.NEAT proved to be theprincipal mediator of resistance to fat gain with overfeeding。其作用竟然大大超过另外三种耗能方式(详见下文)。包括体育运动。最后的结论是:…higherlevels of fidgeting and other non-exercise movements may be a key factor indetermining which of us gain weight easily。 遗憾的是连专家们也弄不清这种消耗能量的方式为什么会有个体差异,但全文从头至尾似于一直在暗示读者:NEAT并非先天注定,而是可以逐步培养的习惯。那么,受身体发福困扰的朋友不妨拿出一点决心和恒心,试试这些“小动作”。
