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Study on deuteron formation mechanism in nucleon-induced reactions

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Nuclear Science and Techniques 2020年第8期31卷 129-136页

作者： Ya-Jun He chen-chen guo Jun Su Long Zhu Zhen-Dong An Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

The mechanism of deuteron formation in neutron-induced reactions is studied within the framework of the isospin-dependent quantum molecular dynamics model,using the GEMINI *** influence of the n+p→d reaction channel is investigated by analyzing the deuteron production cross sections in the neutron-induced reactions12C(n,d),16O(n,d),and 28Si(n,d),with incident energies of 20-100 *** including the n+p→d reaction channel when modeling the collision,the deuteron production cross sections increase,optimizing the cross-section results and bringing them closer to the experimental data *** indicates that the n+p→d reaction channel is an important mechanism for enhancing deuteron production.

关键词： Cluster mechanism Deuteron formation cross section Nucleon-induced reactions

Collective Flows of 16O＋16O Collisions with α-Clustering Configurations

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Chinese Physics Letters 2017年第9期34卷 41-44页

作者： chen-chen guo Wan-Bing He Yu-Gang Ma Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 Institute of Modern Physics Fudan University Shanghai 200433 University of Chinese Academy of Sciences Beijing 100049 School of Physical Science and Technology ShanghaiTech University Shanghai 200031

The main purpose of the present work is to discuss whether or not the collective flows in heavy-ion collision at the Fermi energy can be taken as a tool to investigate the cluster configuration in light nuclei. In practice, within an extended quantum molecular dynamics model, four a-clustering （linear chain, kite, square and tetrahedron） configurations of 16O are employed in the initialization, 16O＋16O around the Fermi energy （40-60 MeV/nucleon） with impact parameter 1-3fro are simulated, and the directed and elliptic flows are analyzed. It is found that collective flows are influenced by the different a-clustering configurations, and the directed flow of free protons is more sensitive to the initial cluster configuration than the elliptic flow. Nuclear reaction at the Fermi energy can be taken as a useful way to study cluster configuration in light nuclei.

关键词： Collective Flows of O Collisions with Clustering Configurations QMD

Predictions for production of superheavy nuclei with Z=105–112 in hot fusion reactions

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Nuclear Science and Techniques 2018年第11期29卷 166-173页

作者： Xiao-Bin Yu Long Zhu Zhi-Han Wu Fan Li Jun Su chen-chen guo Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

Abstract The effects of mass asymmetry on the production of superheavy nuclei(SHN),within the dinuclear system model,are investigated in this *** is observed that the fusion probability decreases with decreasing mass asymmetry.A total of 192 possible combinations of projectiles from O to Ti and targets with half-lives longer than30 days for producing SHN^(264)Db,^(265)Db,^(267)Sg,^(268)Bh,268Sg,^(269)Bh,^(271)Hs,^(271)Mt,^(272)Hs,^(272)Mt,^(273)Mt,^(274)Ds,275Ds,^(275)Rg,^(276)Ds,^(276)Rg,^(277)Rg,^(278)Cn,^(279)Cn,and^(280)Cn are ***,the optimal combinations and incident energies for synthesizing these nuclei are *** of the cross sections for production of SHNare larger than 10 pb;therefore,the process can be carried out with the available experimental equipment.

关键词： DNS model Systematic study Fusion reaction Superheavy nuclei Evaporation residue cross section

Aptamer-based Electrochemical Biosensors for Highly Selective and Quantitative Detection of Adenosine

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Chemical Research in Chinese Universities 2008年第2期24卷 138-142页

作者： ZHENG Fan WU Zai-sheng ZHANG Song-bai guo Meng-meng chen chen-rui SHEN guo-li YU Ru-qin State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China

A new adenosine biosensor based on aptamer probe is introduced in this article. An amino-labeled aptamer probe was immobilized on the gold electrode modified with an o-phenylenediamine electropolymerized film. When adenosine is bound specifically to the aptamer probe, the interface of the biosensor is changed, resulting in the decrement of the peak current. The response current is proportional to the amount of adenosine in sample. The used electrode can be easily regenerated in hot water. The proposed biosensor represents a linear response to adenosine over a concentration range of 1.0x 10^-7-l.0x10^-4 mol/L with a detection limit of 1.0xl0^-8 mol/L. The presented biosensor exhibits a nice specificity towards adenosine. It offers a promising approach for adenosine assay due to its excellent electrochemical properties that are believed to be very attractive for electrochemical studies and electroanalytical applications.

关键词： Adenosine Aptamer Alternating current(AC) voltammetry

3D nitrogen and boron dual-doped carbon quantum dots/reduced graphene oxide aerogel for advanced aqueous and flexible quasi-solid-state zinc-ion hybrid capacitors

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Rare Metals 2023年第7期42卷 2307-2323页

作者： Jun-Jun Yao Chang Liu Jing-Ying Li Zhong-Liang Hu Ru-Yi Zhou chen-chen guo Xin-Ru Liu Fei-Fan Yang Yi-Rong Zhu Hunan Key Laboratory of Green Metallurgy and New Energy Materials College of Materials and Advanced ManufacturingHunan University of TechnologyZhuzhou412007China School of Chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan411104China National&Local Joint Engineering Research Center for Advanced Packaging Material and Technology Hunan University of TechnologyZhuzhou412007China

As prospective energy storage devices,zinc-ion hybrid capacitors(ZHCs)still suffer from unsatisfactory cathode ***,the three dimensional(3D)N,B dual-doped carbon quantum dots/reduced graphene oxide(N,B-CQDs/rGO)composite aerogel is prepared via a onepot hydrothermal *** to the synergism of CQDs modification and N,B dual-doping,the resultant N,B-CQDs/rGO composite aerogel delivers superior electrochemical ***,the as-obtained N,B-CQDs/rGO composite aerogel is served as a cathode for aqueous and flexible quasi-solid-state ZHCs for the first ***,the aqueous N,B-CQDs/rGO//Zn ZHC manifests a large energy density of 96.2 Wh·kg^(-1)at80 W·kg^(-1)and still remains a high energy density of 54.7Wh·kg^(-1)at a superb power density of 80 kW·kg^(-1).Meanwhile,kinetic analyses are employed to elucidate the prominent power performance,and various ex situ tests are undertaken to explore the energy storage mechanism of aqueous *** notably,the flexible quasi-solid-state N,B-CQDs/rGO//Zn ZHC displays a desirable energy density(89.1μWh·cm^(-2)),a superior power density(96,000μW·cm^(-2))and exceptional flexible *** present study offers a valuable reference for designing and developing advanced cathode materials for aqueous and flexible quasi-solid-state ZHCs.

关键词： Carbon quantum dots(CQDs) Graphene aerogel Heteroatom dual-doping Energy storage mechanism Zinc-ion hybrid capacitors(ZHCs)

Light-Regulated Stomatal Aperture in Arabidopsis

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Molecular Plant 2012年第3期5卷 566-572页

作者： chen chen Yu-guo Xiao Xin Li in Ni Department of Plant Biology University of Minnesota Saint Paul MN 55108 USA

The stomatal pores of plant leaves, situated in the epidermis and surrounded by a pair of guard cells, allow CO2 uptake for photosynthesis and water loss through transpiration. Blue light is one of the dominant environmental signals that control stomatal movements in leaves of plants in a natural environment. This blue light response is mediated by blue/UV A light-absorbing phototropins （phots） and cryptochromes （crys）. Red/far-red light-absorbing phytochromes （phys） also play a role in the control of stomatal aperture. The signaling components that link the perception of light signals to the stomatal opening response are largely unknown. This review discusses a few newly discovered nuclear genes, their function with respect to the phot-, cry-, and phy-mediated signal transduction cascades, and possible involve- ment of circadian clock.

关键词： circadian clock cryptochromes phototropins phytochromes light signaling stomata

Modeling differential car-following behavior under normal and rainy conditions: A memory-based deep learning method with attention mechanism

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Chinese Physics B 2023年第6期32卷 187-202页

作者：柏海舰过晨晨丁恒卫立阳孙婷陈星宇 School of Automotive and Transportation Engineering Hefei University of TechnologyHefei 230009China State Key Laboratory of Cognitive Intelligence Hefei 230009China

In order to analyze and learn the difference in car-following behavior between normal and rainy days, we first collect car-following trajectory data of an urban elevated road on normal and rainy days by microwave radar and analyze the differences in speed, relative speed, acceleration, space headway, and time headway among data through statistics. Secondly, owing to the time-series characteristics of car-following data, we use the long short-term memory(LSTM) neural network optimized by attention mechanism(AM) and sparrow search algorithm(SSA) to learn the different car-following behaviors under different weather conditions and build corresponding models(ASL-Normal, ASL-Rain, where ASL stands for AM-SSA-LSTM), respectively. Finally, the simulation test shows that the mean square error(MSE) and reciprocal of time-to-collision(RTTC) of the ASL model are better than those of LSTM and intelligent diver model(IDM), which is closer to the real data. The ASL model can better learn different driving behaviors on normal and rainy days. However,it has a higher sensitivity to weather conditions from cross test on normal and rainy data-sets which need classification training or sample diversification processing. In the car-following platoon simulation, the stability performances of two models are excellent, which can describe the basic characteristics of traffic flow on normal and rainy days. Comparing with ASL-Rain model, the convergence time of ASL-Normal is shorter, reflecting that cautious driving behavior on rainy days will reduce traffic efficiency to a certain extent. However, ASL-Normal model produces a more severe and frequent traffic oscillation within a shorter period because of aggressive driving behavior on normal days.

关键词： car-following behavior deep learning weather condition heterogeneous traffic flow

Plasma L-ENK, AVP, ANP and serum gastrin in patients with syndrome of Liver-Qi-stagnation

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World Journal of Gastroenterology 1999年第1期5卷 66-68页

作者： chen Ze Qi, chen guo Lin, LI Xue Wen, ZHAO Yu Qiu and SHI Lin Jie

AIM To investigate the pathophysiologic basis of syndrome of Liver Qi stagnation and parameters for clinical differentiation. METHODS Plasma L ENK, AVP, ANP and serum gastrin were determined by RIA in 84 patients with neurasthenia, mastodynia, chronic gastritis, and chronic cholecystitis presenting the same syndrome of Liver Qi stagnation in traditional Chinese medicine (TCM). Healthy subjects served as controls in comparison with patients having the same syndrome but with different diseases. RESULTS Among the patients with Liver Qi stagnation, the plasma L ENK, ANP and gastrin levels were 38 83ng/L ± 6 32ng/L , 104 11ng/L ± 29 01ng/L and 32 20ng/L ± 6 68ng/L , being significantly lower than those in the healthy controls ( t =3 34, 6 17, 4 48; P 0 05. CONCLUSION The syndrome of Liver Qi stagnation is closely related to the emotional modulatory abnormality of the brain, with decrease of plasma L ENK, ANP and gastrin, and increase of plasma AVP as the important pathophysiologic basis.

关键词： Syndrome of Liver qi stagnation leucine enkephalin/blood arginine vasopressin/blood atrial natural polypeptide/blood gastrin/blood

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多主频波场的时间阻尼全波形反演

地球物理学报 2017年第8期60卷 3229-3237页

作者：陈生昌陈国新浙江大学地球科学学院杭州310027

低频成分缺失和地下速度强烈变化会导致严重的周期跳现象,是地震数据全波形反演的难题.通过对地震数据加时间阻尼和时间积分降主频处理,提出了一种可有效去除周期跳现象的多主频波场时间阻尼全波形反演方法.由浅到深的速度不准确会造成... 详细信息

低频成分缺失和地下速度强烈变化会导致严重的周期跳现象,是地震数据全波形反演的难题.通过对地震数据加时间阻尼和时间积分降主频处理,提出了一种可有效去除周期跳现象的多主频波场时间阻尼全波形反演方法.由浅到深的速度不准确会造成波形走时失配和走时失配的累积.浅部速度的准确反演可有效地减小深部波形走时失配与周期跳现象.对地震数据施加时间阻尼得到时间阻尼数据,利用不同阻尼值的时间阻尼地震数据实现由浅到深的全波形反演.低主频波场的周期跳现象相对高主频波场的要弱.对地震波场进行不同阶的时间积分以得到不同主频的波场,把低主频波场的全波形反演结果作为高主频波场全波形反演的初始模型.应用缺失4 Hz以下频谱成分的二维盐丘模型合成数据验证所提出的全波形反演方法的正确性和有效性,数值试验结果显示多主频波场的时间阻尼全波形反演方法对缺失低频成分地震数据和地下速度强烈变化具有很好的适应性.

关键词：全波形反演低频缺失速度强变化周期跳多主频波场时间阻尼