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| 1 | Electrochemical synthesis of silver nanoparticles-coated gold nanoporous film electrode and its application to amperometric detection for trace Cr(VI)显示文摘A simple and rapid approach for the electrochemical synthesis of Ag nanoparticles-coated gold nanoporous film (AgGNF) on a gold substrate was reported. The solid gold electrode (SGE) was directly anodized under a high potential of 5 V, and then reduced to obtain gold nanoporous film (AuNF) by freshly prepared ascorbic acid. The Ag nanoparticles (AgNPs) were grown on the AuNF electrode by potential-step electrodeposition. The resulting AgGNF composites electrodes were characterized by scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy and cyclic voltammetry (CV). As-prepared AgGNF electrode was used as a kind of superior sensor for Cr(VI) detection, which exhibited better electrocatalytic behavior than those of AuNF and SGE under identical conditions. Such a designed AgGNF nanocomposites electrode showed outstanding sensitivity (about 0.15 nA/ppb) and favorable reproducibility for Cr(VI) detection. The dependence of reduction current on Cr(VI) concentration is linear from 2 to 370 ppb with a low detection limit of 0.65 ppb. Interferences from other heavy metals ions (Cr3+, Cu2+, Pb2+, As3+ and Hg2+) associated with Cr(VI) analysis could be effectively diminished. The present method proves to be rapid, reliable, sensitive and low-cost. | XU He ZHENG QiaoLi YANG Ping LIU JianShe XING SuJie JIN LiTong | 2011 | Science China Chemistry2011，54，6： | 9 |
| 2 | Comparison of Clinical and Epidemiological Characteristics of Asymptomatic and Symptomatic SARS-CoV-2 Infection in Children显示文摘To understand the epidemiological and clinical features of the symptomatic and asymptomatic pediatric cases of COVID-19,we carried out a prospective study in Shanghai during the period of January 19 to April 30,2020.A total of 49 children(mean age 11.5±5.12 years)confirmed with SARS-CoV-2 infection were enrolled in the study,including 11(22.4%)domestic cases and 38(77.6%)imported cases.Nine(81.8%)local cases and 12(31.6%)imported cases had a definitive epidemiological exposure.Twenty-eight(57.1%)were symptomatic and 21(42.9%)were asymptomatic.Neither asymptomatic nor symptomatic cases progressed to severe diseases.The mean duration of viral shedding for SARS-CoV-2 in upper respiratory tract was 14.1±6.4 days in asymptomatic cases and 14.8±8.4 days in symptomatic cases(P>0.05).Forty-five(91.8%)cases had viral RNA detected in stool.The mean duration of viral shedding in stool was 28.1±13.3 days in asymptomatic cases and 30.8±18.6 days in symptomatic participants(P>0.05).Children<7 years shed viral RNA in stool for a longer duration than school-aged children(P<0.05).Forty-three(87.8%)cases had seropositivity for antibodies against SARS-CoV-2 within 1–3 weeks after confirmation with infection.In conclusion,asymptomatic SARS-CoV-2 infection may be common in children in the community during the COVID-19 pandemic wave.Asymptomatic cases shed viral RNA in a similar pattern as symptomatic cases do.It is of particular concern that asymptomatic individuals are potentially seed transmission of SARS-CoV-2 and pose a challenge to disease control. | Jiehao Cai Xiangshi Wang Jun Zhao Yanling Ge Jin Xu He Tian Hailing Chang Aimei Xia Jiali Wang Jinqiang Zhang Zhongqiu Wei Jingjing Li Chuning Wang Jianshe Wang Qirong Zhu Xiaowen Zhai Mei Zeng | 2020 | Virologica Sinica2020，35，6： | 4 |
| 3 | A simple and sensitive method for the determination of 4-n-octylphenol based on multi-walled carbon nanotubes modified glassy carbon electrode显示文摘A simple and sensitive electroanalytical method was presented for the determination of 4-n-octylphenol(OP) based on multi-walled carbon nanotubes(MWCNTs) modified glassy carbon electrode(GCE).OP was directly oxidized on the MWCNTs/GCE,and the electrochemical oxidation mechanism was demonstrated by a one-electron and one-proton process in the reaction.The oxidation peak current of OP was significantly enhanced by the use of MWCNTs/GCE compared with those of bare glassy carbon electrode,suggesting that the modified electrode can remarkably improve the performance for OP determination.Factors influencing the detection processes were optimized.Under these optimal conditions,a linear relationship between concentration of OP and current response was obtained in the range of 5 × 10-8 to 1 × 10-5 mol/L with a detection limit of 1.5 × 10-8 mol/L and correlation coefficient 0.9986.The modified electrode showed good selectivity,sensitivity,reproducibility and high stability. | Qiaoli Zheng Ping Yang He Xu Jianshe Liu Litong Jin | 2012 | Journal of Environmental Sciences2012，24，9： | 2 |
| 4 | Synthesis of single phase β-SiAlON ceramics by reaction-bonded sintering using Si and Al2O3 as raw materials显示文摘 | He Enquan Yue Jianshe Fan Lei | 2011 | Scripta Mater2011，65，2： | 1 |
| 5 | Synthesis of single phase β-SiAlON ceramics by reaction-bonded sintering using Si and Al 2 O 3 as raw materials显示文摘 | Enquan He Jianshe Yue Lei Fan Chao Wang Hongjie Wang | 2011 | Scripta Materialia2011，，2： | 1 |
| 6 | Synthesis of single phase B-SiAION ceramics by reaction-bonded sintering using Si and AI~O3 as raw materials显示文摘 | He Enquan Yue Jianshe Fan Lei | 2011 | Scripta Materialia2011，65，2： | 1 |
| 7 | High corrosion- resistance nanocrystalline Ni coating on AZ91D magnesium alloy 显示文摘 | Changdong Gu Jianshe Lian Jinguo He | 2006 | Surface and Coatings Technology2006，200，1819： | 1 |
| 8 | High Corrosionresistance Nanocrystalline Ni Coating on AZ 91D Magnesium Alloy显示文摘 | Gu Changdong Lian Jianshe He Jinguo | 2006 | Surace & Coatings Technology2006，200，1819： | 1 |
| 9 | Periodic boundary value problem for first-order impulsive functional differential equations显示文摘 | HE Zhimin YU Jianshe | | 0，，02： | 1 |
| 10 | High corrosion-resistance nanocrystalline Ni coating on AZ91D magnesium alloy显示文摘 | Gu Changdong Lian Jianshe He Jinguo | 2006 | Surface & Coatings Technology2006，200，： | 1 |
| 11 | On the existence of positive solutions of fourth-order difference equation 显示文摘 | HE Zhimin YU Jianshe | 2004 | Applied Mathematies and Computation2004，156，： | 1 |
| 12 | Design and fabrication of superconducting transition edge sensor bolometers with background limited noise performance显示文摘We successfully designed and fabricated TES bolometers utilizing Al/Ti bilayer TESs as sensitive thermometers.To reduce the intrinsic noise level and tune the saturation power of a bolometer,the TES thermometer is placed on a suspended SiN platform which is thermally coupled to the heat bath by four long SiN beams with different geometries.The measurement results show that the detectors have background limited noise performance,with a low noise equivalent power(NEP)on the order of10-17W/Hz1/2and have a saturation power of several tens pW at a bath temperature of 320 mK.These detectors are suitable for applications in ground-based astrophysics experiments by integrating absorbers for specific wavelengths. | Qingya Zhang Jianshe Liu Wenhui Dong Tianshun Wang Genfang He Tiefu Li Xingxiang Zhou Wei Chen | 2014 | Chinese Science Bulletin2014，59，19： | 1 |
| 13 | Synthesis of single phaseβ-SiAlON ceramics by reaction-bonded sintering using Si and Al2O3asraw materials显示文摘 | HE Enquan YUE Jianshe Fan Lei | 2011 | Scri Mater2011，65，15： | 1 |
| 14 | Electro-mechanical offset measurements of beam position monitors显示文摘Purpose The absolute beam position measurement in the booster and storage ring of the high energy photon source(HEPS)requires the offset between the electrical and mechanical centers of the beam position monitor(BPM).Method Traditionally,an RF signal is sent to an antenna or stretched wire aligned with the vacuum chamber,and the signal at each electrode is measured.Conversely,a replacement method using a vector network analyzer,which was proposed by Lambertson,does not involve mechanical alignment and can be used for electrical offset determination.Results and conclusions The electro-mechanical offsets of booster BPMs of the HEPS were measured using the Lambertson method.The result shows good agreement with the stretched wire method within a 30μm error. | Jun He Yanfeng Sui Yong Li Yaoyao Du Linda Yu Junhui Yue Jianshe Cao Xujian Wang Zhe Duan Ouzheng Xiao | 2023 | Radiation Detection Technology and Methods2023，7，2： | 0 |
| 15 | Effect of Fertilizer Application on the Yield of Walnut (Juglans regia L.)显示文摘[Objectives] This study was conducted to explore the fertilization ratio of walnut, so as to provide a basis for rational fertilization of walnut. [Methods] Under the condition of gravelly yellow soil in Chaotian District, Guangyuan City, the orthogonal design of L_9(3~4) was used to test the fertilization ratio of nitrogen, phosphorus and potassium fertilizers. [Results] The effects of nitrogen, phosphorus and potassium fertilizers on walnut yield ranked as phosphate fertilizer>potassium fertilizer>nitrogen fertilizer. The different treatments had great effects on the yield of walnut, and for the land with gravelly yellow soil, the suitable annual fertilization amount of walnut was urea 1 200 g/plant + calcium superphosphate 1 500 g/plant + potassium sulfate 940 g/plant. [Conclusions] This study provides a theoretical basis for rational fertilization of walnut in Sichuan Province. | Anmin MIN Fanrong ZHENG Li ZHANG Jianshe HE Changxu YANG Qianli LIU Li WANG Yu WANG Hongxia LI | 2019 | Agricultural Biotechnology2019，8，2： | 0 |
| 16 | Research and development of the longitudinal feedback system digital signal processing electronics in BEPCII显示文摘Background The current strategy to achieve high luminosity for high energy physics experiments is to store huge currents distributed in many bunches in circular machines such as BEPCII,so the longitudinal coupled bunch instabilities of the beam are inevitable.Purpose Therefore,a longitudinal feedback system is needed to suppress longitudinal oscillation.Otherwise,the beam energy spread will increase;the luminosity and the beam lifetime will decrease under a certain beam current.Methods For filter design of the feedback system,the time domain least square fitting(TDLSF)method is compared to the selective wave filter method;digital signal processing electronics based on commercial board have been developed and tested on BEPCII.Results The final result shows that the self-developed longitudinal feedback system can suppress the longitudinal beam oscillation at 750 mA beam current and meet the requirements of BEPCII;the restrain depth to the sidebands reaches to 40.8 dB. | Di Yin Junhui Yue Huizhou Ma Jianshe Cao Shujun Wei Cunbiao Hao Yanfeng Sui Jun He Jingxia Zhao Zhi Liu | 2021 | Radiation Detection Technology and Methods2021，5，2： | 0 |
| 17 | Development of BPM feedthroughs for the High Energy Photon Source显示文摘Purpose Based on the requirements of the High Energy Photon Source(HEPS),the key components for strip-type and button-type beam position monitors(BPMs)and feedthroughs are designed and manufactured.Method The mechanical structure of the feedthroughs is designed according to the Computer Simulation Technology(CST)simulation results.Resultsandconclusions Small batches of feedthroughs are manufactured,and the structure is optimized based on mechanical,vacuum,electromagnetic,and other characteristic test results.The performance improved significantly owing to optimization through batch product testing,and quality control-related information from several manufacturers is obtained,which provide a foundation for the development of BPMs for HEPS. | Yong Li Jun He Yanfeng Sui Anxin Wang Lin Wang Dechong Zhu Ying Zhao Di Yin Qiang Ye Shujun Wei Taoguang Xu Junhui Yue Jianshe Cao | 2022 | Radiation Detection Technology and Methods2022，6，4： | 0 |
| 18 | Effects of a Combined Application of Nitrogenous and Phosphorus Fertilizers on the Growth of Pinus radiata显示文摘In the arid valley of the upper reaches of the Minjiang river,combined application tests of nitrogenous and phosphorus fertilizers were conducted to the 1-year-old seedlings of Pinus radiate to investigate the appropriate amount of fertilization,so as to provide bases of fertilization management of young P.radiate in the arid val-ley.Different combined application amounts of nitrogenous and phosphorus were studied based on the randomized blocks design.The results showed that in comparing 3 treatment groups with the control,the first and second treatments significantly increased the ground diameter and height of P.radiate,while the third treatment merely significantly increased the ground diameter.Under the conditions of this study,the recommended fertilization amount was 30 g of urea and 150 g of calcium superphosphate per plant for the one-year-old P.radiate. | Jianshe HE Qimei KANG Hua YANG Xinwei ZHU Xiaoqiang TANG Ying KANG Junfang REN Yonghong TANG Qianli LIU | 2019 | Agricultural Biotechnology2019，8，4： | 0 |
| 19 | Design and simulation of cavity BPM for BEPCII显示文摘Background In the linac of Beijing Electron Positron Collider II(BEPCII),the resolution of existing BPMs is several hundred microns.But the requirement of transverse position resolution of BPM for future top-up injection needs to be more precise.Purpose This paper is mainly concerned about the design and simulation of the cavity beam position monitor(CBPM)for BEPCII linac and free electron laser(FEL).The requirement of beam transverse position resolution for linac is several microns,even a few nanometers for FEL.Methods When the beam bunch goes through the CBPM,it can excite different electromagnetic field modes in resonator.In these modes,TM_(110) is the most sensitive to beam transverse position offset.The design of CBPM is aim to analyze the relationship between TM_(110) and beam transverse position by CST Studio and Ansys HFSS.Conclusion In this research,we design a pair of rectangular slots for position cavity to revise the direction of electromagnetic field.The simulation result of theoretical resolution is able to reach 15 nm@1nC with the operating frequency 2500 MHz.It is obviously that CBPM has more excellent resolution than all of operating BPM in BEPCII.Meanwhile,the research of CBPM improves the application of beam detection technology in BEPCII and accumulates technology for future design of HEPS and FEL.The mechanical design of the prototype is being fabricated. | Jiashen Zhou Jianshe Cao Yanfeng Sui Junhui Yue Jun He | 2019 | Radiation Detection Technology and Methods2019，3，3： | 0 |
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