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| 1 | Clinical characteristics of 24 asymptomatic infections with COVID-19 screened among close contacts in Nanjing,China显示文摘Previous studies have showed clinical characteristics of patients with the 2019 novel coronavirus disease(COVID-19)and the evidence of person-to-person transmission.Limited data are available for asymptomatic infections.This study aims to present the clinical characteristics of 24 cases with asymptomatic infection screened from close contacts and to show the transmission potential of asymptomatic COVID-19 virus carriers.Epidemiological investigations were conducted among all close contacts of COVID-19 patients(or suspected patients)in Nanjing,Jiangsu Province,China,from Jan 28 to Feb 9,2020,both in clinic and in community.Asymptomatic carriers were laboratory-confirmed positive for the COVID-19 virus by testing the nucleic acid of the pharyngeal swab samples.Their clinical records,laboratory assessments,and chest CT scans were reviewed.As a result,none of the 24 asymptomatic cases presented any obvious symptoms while nucleic acid screening.Five cases(20.8%)developed symptoms(fever,cough,fatigue,etc.)during hospitalization.Twelve(50.0%)cases showed typical CT images of ground-glass chest and 5(20.8%)presented stripe shadowing in the lungs.The remaining 7(29.2%)cases showed normal CT image and had no symptoms during hospitalization.These 7 cases were younger(median age:14.0 years;P=0.012)than the rest.None of the 24 cases developed severe COVID-19 pneumonia or died.The median communicable period,defined as the interval from the first day of positive nucleic acid tests to the first day of continuous negative tests,was 9.5 days(up to 21 days among the 24 asymptomatic cases).Through epidemiological investigation,we observed a typical asymptomatic transmission to the cohabiting family members,which even caused severe COVID-19 pneumonia.Overall,the asymptomatic carriers identified from close contacts were prone to be mildly ill during hospitalization.However,the communicable period could be up to three weeks and the communicated patients could develop severe illness.These results highlighted the importance of close contact tracing and longitudinally surveillance via virus nucleic acid tests.Further isolation recommendation and continuous nucleic acid tests may also be recommended to the patients discharged. | Zhiliang Hu Ci Song Chuanjun Xu Guangfu Jin Yaling Chen Xin Xu Hongxia Ma Wei Chen Yuan Lin Yishan Zheng Jianming Wang Zhibin Hu Yongxiang Yi Hongbing Shen | 2020 | Science China(Life Sciences)2020，63，5： | 77 |
| 2 | Pantograph-catenary electrical contact system of high-speed railways:recent progress,challenges,and outlooks显示文摘As the unique power entrance,the pantograph-catenary electrical contact system maintains the efficiency and reliability of power transmission for the high-speed train.Along with the fast development of high-speed railways all over the world,some commercialized lines are built for covering the remote places under harsh environment,especially in China;these environmental elements including wind,sand,rain,thunder,ice and snow need to be considered during the design of the pantograph-catenary system.The pantograph-catenary system includes the pantograph,the contact wire and the interface—pantograph slide.As the key component,this pantograph slide plays a critical role in reliable power transmission under dynamic condition.The fundamental material characteristics of the pantograph slide and contact wire such as electrical conductivity,impact resistance,wear resistance,etc.,directly determine the sliding electrical contact performance of the pantograph-catenary system;meanwhile,different detection methods of the pantograph-catenary system are crucial for the reliability of service and maintenance.In addition,the challenges brought from extreme operational conditions are discussed,taking the Sichuan-Tibet Railway currently under construction as a special example with the high-altitude climate.The outlook for developing the ultra-high-speed train equipped with the novel pantograph-catenary system which can address the harsher operational environment is also involved.This paper has provided a comprehensive review of the high-speed railway pantograph-catenary systems,including its progress,challenges,outlooks in the history and future. | Guangning Wu Keliang Dong Zhilei Xu Song Xiao Wenfu Wei Huan Chen Jie Li Zhanglin Huang Jingwei Li Guoqiang Gao Guozheng Kang Chuanjun Tu Xingyi Huang | 2022 | Railway Engineering Science2022，30，4： | 5 |
| 3 | HOMOCLINIC BIFURCATION IN SEMI-CONTINUOUS DYNAMIC SYSTEMS显示文摘 | CHUANJUN DAI MIN ZHAO LANSUN CHEN | 2012 | International Journal of Biomathematics2012，5，6： | 3 |
| 4 | Experimental Investigation of Nozzle Effects on Thrust and Inlet Pressure of an Air-breathing Pulse Detonation Engine显示文摘Nozzle effects on thrust and inlet pressure of a multi-cycle air-breathing pulse detonation engine (APDE) are investigated experimentally. An APDE with 68 mm in diameter and 2 050 mm in length is operated using gasoline/air mixture. Straight nozzle, converging nozzle, converging-diverging nozzle and diverging nozzle are tested. The results show that thrust augmentation of converging-diverging nozzle, diverging nozzle or straight nozzle is better than that of converging nozzle on the whole. Thrust augmentation of straight nozzle is worse than those of converging-diverging nozzle and diverging nozzle. Thrust augmentations of diverging nozzle with larger expansion ratio and converging-diverging nozzle with larger throat area range from 20% to 40% on tested frequencies and are better than those of congeneric other nozzles respectively. Nozzle effects on inlet pressure are also researched. At each frequency it is indicated that filling pressures and average peak pressures of inlet with diverging nozzle and converging-diverging nozzle with large throat cross section area are higher than those with straight nozzle and converging nozzle. Pressures near thrust wall increase in an increase order from without nozzle, with diverging nozzle, straight nozzle and converging-diverging nozzle to converging nozzle. | CHEN Wenjuan FAN Wei ZHANG Qun PENG Changxin YUAN Cheng YAN Chuanjun | 2012 | Chinese Journal of Aeronautics2012，25，3： | 3 |
| 5 | Experimental study of an air-breathing pulse detonation engine ejector显示文摘 | Peng Changxin Fan Wei Zhang Qun Yuan Cheng Chen Wenjuan Yan Chuanjun | 2011 | Experimental Thermal and Fluid Science2011，，6： | 2 |
| 6 | Chaos of a sequence of maps in a metric space显示文摘 | Tian Chuanjun Chen Guanrong | 2006 | Chaos Solitons and Fractals2006，28，： | 1 |
| 7 | Two-Grid Crank-Nicolson FiniteVolume Element Method for the Time-Dependent Schrodinger Equation显示文摘In this paper,we construct a Crank-Nicolson finite volume element scheme and a two-grid decoupling algorithm for solving the time-dependent Schr¨odinger equation.Combining the idea of two-grid discretization,the decoupling algorithm involves solving a small coupling system on a coarse grid space and a decoupling system with two independent Poisson problems on a fine grid space,which can ensure the accuracy while the size of coarse grid is much coarser than that of fine grid.We further provide the optimal error estimate of these two schemes rigorously by using elliptic projection operator.Finally,numerical simulations are provided to verify the correctness of the theoretical analysis. | Chuanjun Chen Yuzhi Lou Tong Zhang | 2022 | Advances in Applied Mathematics and Mechanics2022，14，6： | 1 |
| 8 | Thermodynamic performance analysis of turbofan engine with a pulse detonation duct heater显示文摘 | Wenjuan Chen Wei Fan Hua Qiu Hongqiang Qin Chuanjun Yan | 2011 | Aerospace Science and Technology2011，，1： | 1 |
| 9 | The MMOC and MMOCAA schemes for the finite volume element method of convection-diffusion prob- lems显示文摘 | CHEN Chuanjun LIU Wei | 2011 | Journal of Computational and Applied Mathematics2011，236，6： | 1 |
| 10 | Chaos of a sequence of maps in a metric space 显示文摘 | TIAN Chuanjun CHEN Guanrong | 2006 | Chaos Solitons and Fractals2006，28，4： | 1 |
| 11 | Stability and chaos in 2- D discrete systems 显示文摘 | CHEN Guanrong TIAN Chuanjun SHI Yuming | 2005 | Chaos Solitons and Fraetals2005，25，2： | 1 |
| 12 | Harmful algal bloom-forming dinofl agellate Prorocentrum donghaiense inhibits the growth and photosynthesis of seaweed Sargassum fusiformis embryos显示文摘Harmful algal bloom(HAB)is an ecological disaster to local mariculture.At present,its impact on macrophytes has not been well studied.In this study,we cultivated sexually propagated embryos of S argassum fusiformis-an edible seaweed-in Prorocentrum donghaiense suspensions at different cell densities(0,0.50×10^(5),0.75×10^(5),1.00×10^(5),and 1.50×10^(5) cells/mL)for 10 days,during which growth and photosynthetic activities of the embryos were determined,and a monocultivation was set up for comparison.Results show that the relative growth rate and photosynthetic activities of the embryos co-cultivated with P.donghaiense were inhibited mostly and significantly in the cell densities of 0.75×10^(5),1.00×10^(5),and 1.50×10^(5) cells/mL,and the inhibitory effects increased in overall with increased cell densities.The maximum relative electron transport rates(rETR max)and apparent photosynthetic efficiency(a)of co-cultivated embryos were all significantly lower than monocultivation ones on the 10 th day.Furthermore,the photosynthetic activity detected by chlorophyll-a fluorescence transient(i.e.,OJIP),the electron transport among electron transfer accepters of PSII(photosystem II)and that from PSII to PSI(photosystem I)was restricted,which is probably responsible for the decreases of rETR max andain the co-cultivated embryos.In addition,parts of the photosynthetic reaction centers of PSII in the co-cultivated embryos were inactivated.Therefore,P.donghaiense bloom could restrain the development and photosynthetic activities of S.fusiformis embryos,reduce the seedlings stock,and eventually hinder the development of S.fusiformis production industry. | Caixia WANG Min WANG Binbin CHEN Wenli QIN Lidong LIN Chuanjun DAI Hengguo YU Renhui LI Min ZHAO Zengling MA | 2021 | Journal of Oceanology and Limnology2021，39，6： | 1 |
| 13 | Chaos of a Sequence of Maps in a Metric Space 显示文摘 | Chuanjun Tian Guanrong Chen | 2006 | Chaos Solitons and Fractals2006，28，： | 1 |
| 14 | Identification of parameters in kinetic models using artificial bee colony algorithm 显示文摘 | Chen Guangzhou Wang Jiaquan Li Chuanjun | 2012 | Advances in Information Technology and Industry Applica- tions2012，，136： | 1 |
| 15 | Thermal Wear and Electrical Sliding Wear Behaviors of the Polyimide Modified Polymer-Matrix Pantograph Contact Strip 显示文摘 | TU Chuanjun CHEN Zhenhua XIA Jintong | 2009 | Tribology International2009，42，6： | 1 |
| 16 | A new method for calculating the activity of stable compound from binary phase diagram显示文摘A new method to calculate the activity of a stable compound in a binary phase diagram was presented and dis- cussed. According to the formula for calculating activity from the binary phase diagram, the equilibrium constant can be calculated through the mass action principle after the activities of two pure components were computed respectively. Based on that, the activity of a stable compound can be easily obtained at last. The activity of the stable compound InSb is calcu- lated in the In-Sb binary system by using this method. The result is well consistent with another calculation value. | CHEN Dengfu DONG Lingyan BAI Chenguang LIU Qingcai WANG Chuanjun | 2006 | Rare Metals2006，25，5： | 1 |
| 17 | Stability and chaos in a class of finite-dimensional discrete spatiotemporal systems显示文摘 | Chuanjun Tian Guanrong Chen Shengli Xie | 2008 | Computers and Mathematics with Applications2008，，10： | 1 |
| 18 | Geological characteristics and metallogenesis of the Shilu Fe-ore deposit in Hainan Province, South China显示文摘 | Deru Xu Zhilin Wang Jianxin Cai Chuanjun Wu Nonna Bakun-Czubarow Li Wang Huayong Chen Michael J. Baker Monika Agnieszka Kusiak | 2012 | Ore Geology Reviews2012，，： | 1 |
| 19 | Applicution of prefabricated free flaps for reconstruction of penetrating defects of oral carity显示文摘 | LI zhilai LI rongxin | 2004 | J Cranio-maxillofac Sury2004，，： | 1 |
| 20 | Thermal wear and electrical sliding wear behaviors of the polyimide modified polymer-matrix pantograph contact strip显示文摘 | Tu Chuanjun Chen Zhenhua Xia J intong | 2009 | Tribology Inter national2009，42，6： | 1 |
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