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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 | Fluid-solid Interaction Model for Hydraulic Reciprocating O-ring Seals显示文摘Elastohydrodynamic lubrication characteristics of hydraulic reciprocating seals have significant effects on sealing and tribology performances of hydraulic actuators,especially in high parameter hydraulic systems.Only elastic deformations of hydraulic reciprocating seals were discussed,and hydrodynamic effects were neglected in many studies.The physical process of the fluid-solid interaction effect did not be clearly presented in the existing fluid-solid interaction models for hydraulic reciprocating O-ring seals,and few of these models had been simultaneously validated through experiments.By exploring the physical process of the fluid-solid interaction effect of the hydraulic reciprocating O-ring seal,a numerical fluid-solid interaction model consisting of fluid lubrication,contact mechanics,asperity contact and elastic deformation analyses is constructed with an iterative procedure.With the SRV friction and wear tester,the experiments are performed to investigate the elastohydrodynamic lubrication characteristics of the O-ring seal.The regularity of the friction coefficient varying with the speed of reciprocating motion is obtained in the mixed lubrication condition.The experimental result is used to validate the fluid-solid interaction model.Based on the model,The elastohydrodynamic lubrication characteristics of the hydraulic reciprocating O-ring seal are presented respectively in the dry friction,mixed lubrication and full film lubrication conditions,including of the contact pressure,film thickness,friction coefficient,liquid film pressure and viscous shear stress in the sealing zone.The proposed numerical fluid-solid interaction model can be effectively used to analyze the operation characteristics of the hydraulic reciprocating O-ring seal,and can also be widely used to study other hydraulic reciprocating seals. | LIAO Chuanjun HUANG Weifeng WANG Yuming SUO Shuangfu LIU Ying | 2013 | Chinese Journal of Mechanical Engineering2013，26，1： | 10 |
| 3 | Thermal Fluid-Solid Interaction Model and Experimental Validation for Hydrostatic Mechanical Face Seals显示文摘Hydrostatic mechanical face seals for reactor coolant pumps are very important for the safety and reliability of pressurized-water reactor power plants.More accurate models on the operating mechanism of the seals are needed to help improve their performance.The thermal fluid–solid interaction(TFSI)mechanism of the hydrostatic seal is investigated in this study.Numerical models of the flow field and seal assembly are developed.Based on the mechanism for the continuity condition of the physical quantities at the fluid–solid interface,an on-line numerical TFSI model for the hydrostatic mechanical seal is proposed using an iterative coupling method.Dynamic mesh technology is adopted to adapt to the changing boundary shape.Experiments were performed on a test rig using a full-size test seal to obtain the leakage rate as a function of the differential pressure.The effectiveness and accuracy of the TFSI model were verified by comparing the simulation results and experimental data.Using the TFSI model,the behavior of the seal is presented,including mechanical and thermal deformation,and the temperature field.The influences of the rotating speed and differential pressure of the sealing device on the temperature field,which occur widely in the actual use of the seal,are studied.This research proposes an on-line and assembly-based TFSI model for hydrostatic mechanical face seals,and the model is validated by full-sized experiments. | HUANG Weifeng LIAO Chuanjun LIU Xiangfeng SUO Shuangfu LIU Ying WANG Yuming | 2014 | Chinese Journal of Mechanical Engineering2014，27，5： | 10 |
| 4 | Operation of a Rotary-valved Pulse Detonation Rocket Engine Utilizing Liquid-kerosene and Oxygen显示文摘The pulse detonation rocket engine (PDRE) requires periodic supply of oxidizer, fuel and purge gas. A rotary-valve assembly is fabricated to control the periodic supply in this research. Oxygen and liquid aviation kerosene are used as oxidizer and fuel respectively. An ordinary automobile spark plug, with ignition energy as low as 50 mJ, is used to initiate combustion. Steady operation of the PDRE is achieved with operating frequency ranging from 1 Hz to 10 Hz. Experimentally measured pressure is lower than theoretical value by 13% at 1 Hz and 37% at 10 Hz, and there also exists a velocity deficit at different operating frequencies. Both of these two phenomena are believed mainly due to droplet size which depends on atomization and vaporiza-tion of liquid fuel. | WANG Ke FAN Wei YAN Yu ZHU Xudong YAN Chuanjun | 2011 | Chinese Journal of Aeronautics2011，24，6： | 9 |
| 5 | Fluid-solid strong-interaction model of mechanical seals in reactor coolant pumps显示文摘The studies on the mechanisms and performances of the mechanical seals in reactor coolant pumps are very important for the safe operations of the pressurized water reactor power plants.Based on the hydrostatic mechanical seal in reactor coolant pumps,an analytical fluid-solid strong-interaction model is proposed in this paper.According to the design features and operational principles of the seal,an analytical method to calculate the mechanical deformation of the seal assembly is developed based on the ring deformation theory.A strong-interaction algorithm combining the analysis of the mechanical deformation of the seal assembly and flow field between the seal faceplates is utilized,in which the three kinds of equations including the fluid domain,solid domain and coupling action are constituted in the same equations set and all the variables are solved simultaneously.So the analytical fluid-solid strong-interaction model used for the seal is built.Moreover,the model is verified by the experimental results.Based on the model,the design parameters of the seal are studied.Two different conditions of the general case and fixed seal leakage rate are discussed respectively,and the regularities that the seal behaviors are affected by the parameters of the holding screws on the clamp rings and seal faceplates are obtained.The research results can provide a theoretical basis for performance analysis,design and assemblage of the seal.Compared to the numerical methods,the proposed model has the unique advantages of high efficiency,convenience and easy application of constraints. | LIAO ChuanJun HUANG WeiFeng SUO ShuangFu LIU XiangFeng WANG YuMing | 2011 | Science China(Technological Sciences)2011，54，9： | 9 |
| 6 | Neurofilament proteins in axonal regeneration and neurodegenerative diseases显示文摘Neurofilament protein is a component of the mature neuronal cytoskeleton, and it interacts with the zygosome, which is mediated by neurofilament-related proteins. Neurofilament protein regulates enzyme function and the structure of linker proteins. In addition, neurofilament gene expression plays an important role in nervous system development. Previous studies have shown that neurofilament gene transcriptional regulation is crucial for neurofilament protein expression, especially in axonal regeneration and degenerative diseases. Post-transcriptional regulation increased neurofilament protein gene transcription during axonal regeneration, ultimately resulting in a pattern of neurofilament protein expression. An expression imbalance of post-transcriptional regulatory proteins and other disorders could lead to amyotrophic lateral sclerosis or other neurodegenerative diseases. These findings indicated that after transcription, neurofilament protein regulated expression of related proteins and promoted regeneration of damaged axons, suggesting that regulation disorders could lead to neurodegenerative diseases. | Haitao Wang Minfei Wu Chuanjun Zhan Enyuan Ma Maoguang Yang Xiaoyu Yang Yingpu Li | 2012 | Neural Regeneration Research2012，7，8： | 8 |
| 7 | Adjustable thermal expansion in La(Fe,Si)13-based conductive composites by high-pressure synthesis显示文摘Providing a suitable contact interface, where a high conductivity material with a desirable coefficient of thermal expansion(CTE) adjoins the target micro-electric devices, is very crucial to optimize the properties and service life of the relevant instruments. Regrettably, a high conductivity, low thermal expansion and relatively inexpensive material is very rare. Composites, fortunately, can offer a method to design materials with adjustable properties by mixing two or more diverse constituents. In this paper, high conductivity composites with adjustable thermal expansion were successfully prepared by a high-pressure synthesis. The composites are based on combining La(Fe,Si)13-based compounds, the materials showing a giant, isotropic negative thermal expansion(NTE) properties, within Cu matrix. The La(Fe,Si)13-based compounds were used to adjust the CTE of the composites, while the Cu phase is in charge of tuning the thermal conductivity properties. Thus, by changing the relative amount of the two components, the composites with high conductivities and adjustable CTE were achieved. Furthermore, the thermal expansion and magnetic properties of the composites were investigated by a physical property measurement system. The present results highlight the potential applications of the Cu-based high conductivity composites with room-temperature NTE properties in the thermal contacts to various semiconductor and microelectronic devices. | Wei Wang Rongjin Huang Yi Shan Yuqiang Zhao Xinran Shan Shibin Guo Chuanjun Huang Laifeng Li | 2019 | Progress in Natural Science:Materials International2019，29，1： | 2 |
| 8 | Broad negative thermal expansion operation-temperature window in antiperovskite manganese nitride with small crystallites显示文摘Using spark plasma sintering (SPS), Mn3Cu0.6Ge0.4N crystallites have been fabricated with different crystallite sizes, and their magnetic properties and thermal behaviors were systemically investigated. With decreasing crystallite size, the magnetic transition becomes increasingly slow, accompanied by broadening of the negative thermal expansion (NTE) operation-temperature window. The NTE operation-temperature window for the 12-nm crystallite sample reaches at 140 K, which is about 75% larger than that of the 74-nm crystallite sample. The magnetic properties and NTE operation-temperature window can be tuned by varying the crystallite size. This discovery will promote an even wider range of practical applications in precision devices. | Jie Tan Rongjin Huang Wei Wang Wen Li YuqiangZhao Shaopeng Li Yemao Han Chuanjun Huang Laifeng Li | 2015 | Nano Research2015，8，7： | 2 |
| 9 | Ex- perimental Study of Ignition and Detonation Initiation in Two-Phase Valveless Pulse Detonation Engines显示文摘 | Wang Zhiwu Yan Chuanjun Zheng Longxi | 2009 | Com- bustion Science and Technology2009，181，10： | 1 |
| 10 | Study on the erosion characteristics of copper-carbon electrode pairs by DC air arc显示文摘As common electric contact materials,copper-carbon electrode pairs are widely used in the field of electric contact such as in high-speed railways,motor collector rings and grounding brushes.They play a key role in energy transmission in the above-mentioned systems.Arc erosion has become a key issue threatening system safety.In this work,a dedicated arc erosion platform was built to study the polarity effect of copper-carbon electrode pairs.It was found that arc dynamics and electrodes erosion behaviours were significantly different under different polarities,which could be understood from the mechanism of heat transfer,cooling and electron emission of the electrode.Then,when the carbon material was used as an anode,the arc caused carbon transfer:the carbon material sublimated quickly due to electron condensation and thermal conduction and quickly condensed on the low-temperature metal electrode,while the carbon material transfer could partly inhibit the oxidation of the cathode metal electrode.In addition,the rapid sublimation of the carbon material produced high-temperature airflow,which would make the arc impedance fluctuate and cause the arc voltage to jump.Finally,the anode heat transfer and cathode cooling mechanism directly affected the material state,and the erosion of the anode material was more serious。 | Wenhan Xie Guangning Wu Zefeng Yang Pengpeng She Hong Wang Haozi Zuo Wenfu Wei Guoqiang Gao Chuanjun Tu | 2021 | High Voltage2021，6，4： | 1 |
| 11 | 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 |
| 12 | Mineral nutrient imbalance,DNA lesion and DNA-protein crosslink involved in growth retardation of Vicia faba L.seedlings exposed to lanthanum ions显示文摘Effects of mineral nutrient imbalance,DNA lesion and DNA-protein crosslink on growth of Vicia faba L.seedlings hydroponically cultivated in concentrations of extraneous lanthanum(La) for 20 days were investigated in the present experiment.The results showed that contents of La,Cu or K elements in roots generally changed synchronously with those in leaves,while Ca,Fe,Zn,Mg,Mn or P in the roots altered inversely to those in the leaves.Thus,the extraneous La led to redistribution and imbalance of mineral nutrient elements in the roots and leaves.DNA lesion and DNA-protein crosslink were investigated by single cell gel electrophoresis(SCGE) and sodium dodecyl sulfate/potassium(SDS/K+) precipitation methods,respectively.The results demonstrated that the increasing La induced DNA break and DNA-protein crosslinks(DPCs) in the seedlings.These results suggested that mineral nutrient imbalance,DNA lesion and DNA-protein crosslink were involved in the growth retardation and growth alteration of the seedlings,which may help to understand the mechanisms of rare earth elements(REEs) on plant growth. | Chengrun Wang Kegui Zhang Mei He Chuanjun Jiang Liumin Tian Yuan Tian XiaorongWang | 2012 | Journal of Environmental Sciences2012，24，2： | 1 |
| 13 | 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 |
| 14 | Competitiveness of alga Microcystis aeruginosa co-cultivated with cyanobacterium Raphidiopsis raciborskii confirms its dominating position显示文摘Microcystis aeruginosa has always been regarded as the main culprit of cyanobacterial blooms in freshwater.However,in recent years,Raphidiopsis raciborskii has gradually replaced M.aeruginosa as the culprit of cyanobacterial blooms in some tropical and subtropical shallow lakes.To reveal which one plays a more dominant role,interactions between cylindrospermospin(CYN)-producing R.raciborskii and microcystins(MCs)-producing or non-MCs-producing M.aeruginosa strains were studied using bialgal cultures at different initial ratios of biomasses of the two species at 25℃.During the co-cultivation,the M.aeruginosa strains inhibited the growth and heterocyst formation of R.raciborskii filaments,and thus occupied a dominant position during the co-cultivation regardless of the initial biomass ratios in the cultures.In addition,the MCs-producing M aeruginosa strain contributed to a higher portion of the total biomass and exerted a stronger inhibitory effect on R.raciborskii compared with the non-MCs-producing strain.However,the growth of both MCs-producing and non-MCs-producing M.aeruginosa strains was stimulated by R.raciborskii in the co-cultures compared with M.aeruginosa monoculture,indicating that M.aeruginosa could outcompete R.raciborskii if given enough time,enabling it to develop into the dominant species even in very low initial concentration.To our best knowledge,this is the first report on the loss of heterocyst formation by a species of cyanobacteria that resulted from interactions between two different species of cyanobacteria.These findings indicate that it is difficult for R.raciborskii to replace the dominant position of M.aeruginosa under the experimental environmental condition,and the allelopathic effects of M.aeruginosa on R.raciborskii could significantly contribute to the success of M.aeruginosa. | Zengling MA Xiaoqiao ZHANG Renhui LI Min WANG Wenli QIN He ZHANG Gang LI Henguo YU Chuanjun DAI Min ZHAO | 2022 | Journal of Oceanology and Limnology2022，40，5： | 1 |
| 15 | 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 |
| 16 | Performances of diffusion kurtosis imaging and diffusion tensor imaging in detecting white matter abnormality in schizophrenia显示文摘 | Jiajia Zhu Chuanjun Zhuo Wen Qin Di Wang Xiaomei Ma Yujing Zhou Chunshui Yu | 2014 | NeuroImage: Clinical2014，，： | 1 |
| 17 | Experimental study of ignition and detonation initiation in two-phase valveless pulse detonation engines显示文摘 | Wang Zhiwu Yan Chuanjun Zheng Longxi | | 0，，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 | Experimental study of atomization effects on two-phase pulse detonation engines显示文摘 | Wang Zhiwu Yan Chuanjun Fan Wei | | 0，，6： | 1 |
| 20 | Transition metal carbonate anodes for Li-ion battery: fundamentals,synthesis and modification显示文摘Even though transition metal carbonates(TMCs, TM = Fe, Mn, Co, Ni etc.), show high theoretical capacities, rich reserves and environmental friendliness as anodes for lithium-ion batteries(LIBs), they suffer from sluggish electronic/ionic conductivities and huge volume variation, which severely deteriorate the rate capacities and cycling performances. Understanding the intrinsic reaction mechanism and further developing ideal TMC-based anode with high specific capacity, excellent rate capabilities, and longterm cycling stability are critical for the practical application of TMCs. In this review, we firstly focus on the fundamental electrochemical energy-storage mechanisms of TMCs, in terms of conversionreaction process, pseudocapacitance-type charge storage, valence change for charge storage and catalytic conversion mechanisms. Based on the reaction mechanisms, various modification strategies to improve the electrochemical performance of TMCs are summarized, covering:(i) micro-nano structural engineering, in which the influence factors on the morphology are discussed, and multiple architectures are listed;(ii) elemental doping, in which the intrinsic mechanisms of metal/nonmetal elements doping on the electrochemical performance are deeply explored;(iii) multifunctional compositing strategies, in which the specific affections on structure, electronic conductivity and chemo-mechanical stability are summarized.Finally, the key challenges and opportunities to develop high-performance TMCs are discussed and some solutions are also proposed. This timely review sheds light on the path towards achieving cost-effective and safe LIBs with high energy density and long cycling life using TMCs-based anode materials. | Rui Zhang Qingfeng Fu Peng Gao Wang Zhou Hui Liu Chaohe Xu Jian-Fang Wu Chuanjun Tu Jilei Liu | 2022 | Journal of Energy Chemistry2022，31，7： | 1 |
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