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您的检索式：作者名="Peng Da Huo"
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| 1 | Mechanism of plasticity enhancement of AZ31B magnesium alloy sheet by accumulative alternating back extrusion显示文摘Accumulative alternating back extrusion was a potential fine-grain modification method.In this paper,it was an innovative attempt to develop high-performance magnesium alloy sheet by this process.Under the condition of 350 K,commercial AZ31 magnesium alloy was made into billet by accumulative alternating back extrusion,and then extruded into fine-grain magnesium alloy sheet.Through a systematic study of its microstructure and mechanical properties,the results showed that the initial state had an important influence on the evolution of the structure during extrusion.After accumulative alternating back extrusion to produce the billet,the grain size of the sheet obtained by extrusion was significantly refined,which was related to the accumulation of deformation and grain refinement during the alternating loading process.Grain refinement caused the proportion of dynamic recrystallization inside the sheet with 2 cycles of accumulative alternating back extrusion to drop to 27%.With the increase of extrusion cycles from 2 to 4,the high density of dislocations led to an increase in the proportion of dynamic recrystallization and finer grains.The texture changed from strong basal texture to weak bimodal texture.The results of uniaxial tensile test show that due to grain refinement and texture change,the yield strength was significantly reduced,and the plasticity was significantly improved.It was verified that accumulative alternating back extrusion was meaningful for subsequent processing,and it also provided scientific guidance for the development of fine-grained magnesium alloy sheet. | Ye Wang Feng Li Nan Bian Hua Qiu Du Peng Da Huo | 2023 | Journal of Magnesium and Alloys2023，11，5： | 2 |
| 2 | Moving Epidemic Method for Surveillance and Early Warning of Hand, Foot, and Mouth Disease in Beijing, China显示文摘Hand,foot,and mouth disease (HFMD) is an acute infection caused by enteroviruses that is commonly seen in children^([1]).High infectivity,large number of asymptomatic infections,complex transmission routes,and rapid spread make it difficult to control HFMD.Since 2008,China has reported> 23 million HFMD cases,including>0.15million severe cases^([2]).HFMD tops the list of notifiable infectious diseases in terms of case number and incidence rate,leading to a huge disease burden^([3]).Timely and accurate assessment of HFMD epidemics is essential for a holistic understanding of the outbreaks and for effective prevention and control strategies.Currently,there are no quantitative indicators to determine the duration and intensity of HFMD epidemics in Beijing. | DONG Shuai Bing WANG Yu HUO Da ZHAO Hao LIU Bai Wei LI Ren Qing GAO Zhi Yong WANG Xiao Li ZHANG Dai Tao WANG Quan Yi JIA Lei YANG Peng | 2023 | Biomedical and Environmental Sciences2023，36，12： | 0 |
| 3 | A Comparison of Clinical Characteristics of Infections with SARS-CoV-2 Omicron Subvariants BF.7.14 and BA.5.2.48-China,October-December 2022显示文摘Summary What is already known about this topic?Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)continues to evolve,the clinical manifestations resulting from different SARS-CoV-2 variants may demonstrate significant variation.What is added by this report?We conducted a comparative analysis of the clinical features associated with SARS-CoV-2 Omicron subvariants BF.7.14 and BA.5.2.48 infections.The results of our study indicate that there are no substantial differences in clinical manifestations,duration of illness,healthcare-seeking behaviors,or treatment between these two subvariants.What are the implications for public health practice?Timely identification of alterations in the clinical spectrum is crucial for researchers and healthcare practitioners in order to enhance their comprehension of clinical manifestations,as well as the progression of SARS-CoV-2.Furthermore,this information is beneficial for policymakers in the process of revising and implementing appropriate countermeasures. | Da Huo Tong Yu Ying Shen Yang Pan Fu Li Shujuan Cui Bing Lyu Zhichao Liang Daitao Zhang Peng Yang Quanyi Wang Yue Sun Zhaomin Feng | 2023 | China CDC weekly2023，5，23： | 0 |
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