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7篇 您的检索式:作者名="Qingfeng Sheng"
    题名 作者 年代 出处 被引量
1Re-operation for Hirschsprung’s disease: experience in 24 patients from China显示文摘Qingfeng Sheng Zhibao Lv Xianmin Xiao 2012Pediatric Surgery International2012,,5:1
2Science with the 2.5-meter Wide Field Survey Telescope(WFST)显示文摘The Wide Field Survey Telescope(WFST) is a dedicated photometric surveying facility being built jointly by University of Science and Technology of China(USTC) and the Purple Mountain Observatory(PMO). It is equipped with a 2.5-meter diameter primary mirror, an active optics system, and a mosaic CCD camera with 0.73 gigapixels on the primary focal plane for highquality image capture over a 6.5-square-degree field of view. The installation of WFST near the summit of Saishiteng mountain in the Lenghu region is scheduled in summer of 2023, and the operation is planned to start three months later. WFST will scan the northern sky in four optical bands(u, g, r and i) at cadences from hourly/daily in the deep high-cadence survey(DHS) program, to semi-weekly in the wide field survey(WFS) program. During a photometric night, a nominal 30 s exposure in the WFS program will reach a depth of 22.27, 23.32, 22.84, and 22.31(AB magnitudes) in these four bands, respectively, allowing for the detection of a tremendous amount of transients in the low-z universe and a systematic investigation of the variability of Galactic and extragalactic objects. In the DHS program, intranight 90 s exposures as deep as 23(u) and 24 mag(g), in combination with target of opportunity follow-ups, will provide a unique opportunity to explore energetic transients in demand for high sensitivities, including the electromagnetic counterparts of gravitational wave events, supernovae within a few hours of their explosions,tidal disruption events and fast, luminous optical transients even beyond redshift of unity. In addition, the final 6-year co-added images, anticipated to reach g■25.8 mag in WFS or 1.5 mags deeper in DHS, will be of fundamental importance to general Galactic and extragalactic science. The highly uniform legacy surveys of WFST will serve as an indispensable complement to those of the Vera C. Rubin Observatory's Legacy Survey of Space and Time(LSST) that monitors the southern sky.Tinggui Wang Guilin Liu Zhenyi Cai Jinjun Geng Min Fang Haoning He Ji-an Jiang Ning Jiang Xu Kong Bin Li Ye Li Wentao Luo Zhizheng Pan Xuefeng Wu Ji Yang Jiming Yu Xianzhong Zheng Qingfeng Zhu Yi-Fu Cai Yuanyuan Chen Zhiwei Chen Zigao Dai Lulu Fan Yizhong Fan Wenjuan Fang Zhicheng He Lei Hu Maokai Hu Zhiping Jin Zhibo Jiang Guoliang Li Fan Li Xuzhi Li Runduo Liang Zheyu Lin Qingzhong Liu Wenhao Liu Zhengyan Liu Wei Liu Yao Liu Zheng Lou Han Qu Zhenfeng Sheng Jianchun Shi Yiping Shu Zhenbo Su Tianrui Sun Hongchi Wang Huiyuan Wang Jian Wang Junxian Wang Daming Wei Junjie Wei Yongquan Xue Jingzhi Yan Chao Yang Ye Yuan Yefei Yuan Hongxin Zhang Miaomiao Zhang Haibin Zhao Wen Zhao 2023Science China(Physics,Mechanics & Astronomy)2023,66,10:1
3The clinicopathological significance and relationship of G li1, MDM 2 and p53 expression in resectable pancreatic cancer显示文摘Weiwei Sheng Ming Dong Jianping Zhou Xin Li QingFeng Liu Qi Dong Feng Li 2014Histopathology2014,,4:1
4基于激光三角法的电装后PCB成像系统设计显示文摘With the increasing miniaturisation and integration of electronic products and the increase of heat, it is necessary to design and introduce heat sinks and install fans. The volume of electronic components, especially the height, is very important for the structural and thermal design of electronic devices. This paper presents a design scheme of an online height measurement device based on laser triangulation and commercial charge coupled device(CCD). It analyzes the principles of electronic component height measurement, and expounds the composition and working principle of the laser measurement system. In addition, the commonly used methods to determine the center position are compared and analysed. These methods include circle fitting, gray centroid and extension method or Gaussian fitting. These methods usually lead to different results. The experimental results show that the fitting speed of the gray centroid is faster. The 3 D model of components is given through measurement, and the error factors affecting measurement are analysed.LIU Qingfeng LI Bo WANG Qi ZHAO Sheng AN Wanqing SU Xinming LIU Xiaoning ZHU Xi 2021Aerospace China2021,22,4:0
5Study on the growth of platinum nanowires as cathode catalysts in proton exchange membrane fuel cells显示文摘The platinum nanowires have been verified to be a promising catalyst to promote the performance of proton exchange membrane fuel cells.In this paper,accurately controlled growth of nanowires in a carbon matrix is achieved for reducing Pt loading.The effects of formic acid concentration and reaction temperature on the morphology and size of the Pt nanowires,as well as their electrochemical performances in a single cell,are investigated.The results showed that the increase in the formic acid concentration results in a volcano trend with the length of Pt nanowires.With increasing reduction temperature,the diameter of Pt nanowires increases while Pt particles evolve from one-dimensional to zero-dimensional up to 40°C.A mechanism of the Pt nanowires growth is proposed.The optimized Pt nanowires electrode exhibits a power density(based on electrochemical active surface area)79%higher than conventional Pt/C one.The control strategy obtained contributes to the design and control of novel nanostructures in nano-synthesis and catalyst applications.Ruiqing Wang Xiaolan Cao Sheng Sui Bing Li Qingfeng Li 2022Frontiers of Chemical Science and Engineering2022,16,3:0
6Surveillance of Multidrug-Resistant Bacterial Infections in Non-Adult Patients-Zhejiang Province,China,2014-2019显示文摘ABSTRACT Introduction:Antimicrobial resistance has become a major public health threat globally.The prevalence of multidrug-resistant(MDR)bacterial infections increased substantially among inpatients under 18 years of age in recent years.In Zhejiang Province,China,the trends of drug-resistance in non-adult patients from 2014 to 2019 were monitored,aiming to determine the variation patterns and epidemiological features of MDR strains.Yuchen Wu Shi Chen Jiaping Li Chang Cai Hanyu Wang Mingming Zhou Junmin Cao Qiang Wang Shenghai Wu Shibiao Ding Xiaofei Zhao Long Sun Qingfeng Hu Hongwei Zhou Xiang Qian Qing Yang Sheng Chen Rong Zhang 2021China CDC weekly2021,3,47:0
7Proteasome Inhibitors Sensitize Hepatocellular Carcinoma Cells to TRAIL显示文摘OBJECTIVE To investigate the effect of proteasome inhibition on the sensitivity of carcinoma cells to TRAIL-inducing apoptosis, and to study the mechanism of the response. METHODS Human hepatocellular carcinoma cells, pretreated with the proteasome inhibitor, MG132, were cotreated with TRAIL. Western blot assays, immunoprecipitation and RT-PCR were performed to test the expression of the Bcl-2 family proteins and Bax mRNA. RESULTS We found that (i) proteasome inhibition sensitized the human hepatocellular carcinoma cells to TRAIL; and (ii) resulted in Bax accumulation before release of cytochrome C and induction of apoptosis. These results were associated with the ability of proteasome inhibitors to overcome Bcl-2-mediated antiapoptotic function; (iii) Bax is regulated by an ubiquitin/proteasome-dependent degradation pathway. CONCLUSION Proteasome inhibition sensitized hepatocellular carcinoma cells to TRAIL by the inhibition of the ubiquitin/proteasome-mediated Bax degradation pathway.Qingfeng Sheng Yurong Shi Qiang Li Jihui Hao Ruifang Niu Xiyin Wei Yi Yang Lin Zhang 2006Chinese Journal of Clinical Oncology2006,3,6:0
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