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| 1 | Stable perovskite solar cells with efficiency of 22.6%via quinoxaline-based polymeric hole transport material显示文摘Poor stability of spiro-OMe TAD hole transport materials(HTMs)with dopant is a major obstacle for the commercialization of perovskite solar cells(pero-SCs).Herein,we demonstrate a series of quinoxaline-based D-A copolymers PBQ5,PBQ6 and PBQ10 as the dopant-free polymer HTMs for high performance pero-SCs.The D-A copolymers are composed of fluorothienyl benzodithiophene(BDTT)as D-unit,difluoroquinoxaline(DFQ)with different side chains as A-unit,and thiophene asπ-bridge,where the side chains on the DFQ unit are bi-alkyl for PBQ5,bi-alkyl-fluorothienyl for PBQ6,and alkoxyl for PBQ10.All the three copolymers are adopted as the dopant-free HTM in the pero-SCs.The planar n-i-p structured pero-SCs based on(FAPb I_(3))_(0.98)(MAPb Br_(3))_(0.02)with PBQ6 HTM demonstrated the high power conversion efficiency(PCE)of 22.6%with Vocof1.13 V and FF of 80.8%,which is benefitted from the suitable energy level and high hole mobility of PBQ6.The PCE of 22.6%is the highest efficiency reported in the n-i-p structured pero-SCs based on dopant-free D-A copolymer HTM.In addition,the peroSCs show significantly enhanced ambient,thermal and light-soaking stability compared with the devices with traditional spiroOMe TAD HTM. | Chenxing Lu Can Zhu Lei Meng Chenkai Sun Wenbin Lai Shucheng Qin Jinyuan Zhang Wenchao Huang Jiaqi Du Yiyang Wang Yongfang Li | 2021 | Science China Chemistry2021，64，11： | 2 |
| 2 | Technology for recycling and regenerating graphite from spent lithium-ion batteries显示文摘With the annual increase in the amount of lithium-ion batteries(LIBs),the development of spent LIBs recycling technology has gradually attracted attention.Graphite is one of the most critical materials for LIBs,which is listed as a key energy source by many developed countries.However,it was neglected in spent LIBs recycling,leading to pollution of the environment and waste of resources.In this paper,the latest research progress for recycling of graphite from spent LIBs was summarized.Especially,the processes of pretreatment,graphite enrichment and purification,and materials regeneration for graphite recovery are introduced in details.Finally,the problems and opportunities of graphite recycling are raised. | Chenxing Yi Lijie Zhou Xiqing Wu Wei Sun Longsheng Yi Yue Yang | 2021 | Chinese Journal of Chemical Engineering2021，34，11： | 2 |
| 3 | Hybrid C8-BTBT/In GaAs nanowire heterojunction for artificial photosynaptic transistors显示文摘The emergence of light-tunable synaptic transistors provides opportunities to break through the von Neumann bottleneck and enable neuromorphic computing.Herein,a multifunctional synaptic transistor is constructed by using 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene(C8-BTBT)and indium gallium arsenide(InGaAs)nanowires(NWs)hybrid heterojunction thin film as the active layer.Under illumination,the Type-I C8-BTBT/InGaAs NWs heterojunction would make the dissociated photogenerated excitons more difficult to recombine.The persistent photoconductivity caused by charge trapping can then be used to mimic photosynaptic behaviors,including excitatory postsynaptic current,long/short-term memory and Pavlovian learning.Furthermore,a high classification accuracy of 89.72%can be achieved through the single-layer-perceptron hardware-based neural network built from C8-BTBT/InGaAs NWs synaptic transistors.Thus,this work could provide new insights into the fabrication of high-performance optoelectronic synaptic devices. | Yiling Nie Pengshan Xie Xu Chen Chenxing Jin Wanrong Liu Xiaofang Shi Yunchao Xu Yongyi Peng Johnny C.Ho Jia Sun Junliang Yang | 2022 | Journal of Semiconductors2022，43，11： | 1 |
| 4 | New developments of HIF injector显示文摘The ultra-high intensity heavy-ion beam is highly pursued for heavy-ion researches and applications.However,it is limited by heavy-ion production of ion source and space-charge-effect in the low energy region.The Heavy-ion Inertial Fusion(HIF)facilities were proposed in 1970s.The HIF injectors have large cavity number and long total length,e.g.,there are 27 injectors in HIDIF and HIBLIC is 30 km in length,and the corresponding HIF facilities are too large and too expensive to be constructed.Recently,ion acceleration technologies have been developing rapidly,especially in the low energy region,where the acceleration of high intensity heavy-ions is realized.Meanwhile,super-conducting(SC)acceleration matures and increases the acceleration gradient in medium and high energy regions.The length of HIF injectors can be shortened to a buildable length of 2.5 km.This paper will present a review of a renewed HIF injector,which adopts multi-beam linac-based cavities. | Liang Lu Wei Ma Chenxing Li Tao He Lei Yang Liepeng Sun Xianbo Xu Wenbing Wang Longbo Shi | 2018 | Matter and Radiation at Extremes2018，3，1： | 1 |
| 5 | Fluorescence study on theinteraction of human serum albumin with loureirin 显示文摘 | ChenX Sun ZF Yao XJ | 2010 | Spectroscopy2010，24，： | 1 |
| 6 | Internet resources for proteins associated with drug therapeutic effects, adverse reactions and ADME显示文摘 | Ji ZL Sun LZ ChenX etal | 2003 | Drug Discovery Today2003，8，12： | 1 |
| 7 | Maximum power and corresponding efficiency of an irreversible blue heat engine for harnessing waste heat and salinity gradient energy显示文摘In this study,a novel irreversible cyclic model of a capacitive mixing blue heat engine mainly consisting of super capacitors,charging and discharging circuits,a heat source,as well as two water sources with given salt concentrations is established for harvesting salinity gradient energy and waste heat.Additionally,the effects of the charging voltage and ratio of the minimum to maximum surface electric charge density on the thermodynamic efficiency and power output of the cycle are discussed.The maximum power output of the cycle is calculated.The optimized ranges of efficiency and power output as well as the temperatures of two isothermal processes are determined.It is established that during the isoelectric quantity process,there is not only an increase in thermal voltage owing to the temperature difference,but also an increase in concentration voltage owing to the salinity gradient.Consequently,the blue heat engine can obtain higher energy conversion efficiency than a conventional heat engine.When the temperature ratio of the heat source to the heat sink is 1.233,the maximum efficiency can reach approximately36%.The results obtained can promote the application of capacitive mixing technology in real life,reducing the consumption of fossil fuels. | LIN Jian XIE Shan JIANG ChenXing SUN YiFei CHEN JinCan ZHAO YingRu | 2022 | Science China(Technological Sciences)2022，65，3： | 1 |
| 8 | 6-5 Introduction to Operation Status of ADS Injector IIR FQ System in 2015显示文摘The injector II RFQ accelerator for ADS LINAC had realized 10 mA CW beam acceleration in 2014, and it is the rst milestone for the ADS superconducting LINAC. The main task of the RFQ in 2015 was to maintain a stable and reliable operation status to provide the necessary beam for the commissioning of subsequent superconducting cavities. | Zhang Zhouli Shi Aimin Sun Liepeng Xu Xianbo Shi Longbo Li Chenxing Wang Wenbin Ma Wei Lu Liang He Yuan | 2015 | IMP & HIRFL Annual Report2015，，1： | 0 |
| 9 | Toward an accurate method renaming approach via structural and lexical analyses显示文摘Methods in programs must be accurately named to facilitate source code analysis and comprehension.With the evolution of software,method names may be inconsistent with their implemented method bodies,leading to inaccurate or buggy method names.Debugging method names remains an important topic in the literature.Although researchers have proposed several approaches to suggest accurate method names once the method bodies have been modified,two main drawbacks remain to be solved:there is no analysis of method name structure,and the programming context information is not captured efficiently.To resolve these drawbacks and suggest more accurate method names,we propose a novel automated approach based on the analysis of the method name structure and lexical analysis with the programming context information.Our approach first leverages deep feature representation to embed method names and method bodies in vectors.Then,it obtains useful verb-tokens from a large method corpus through structural analysis and noun-tokens from method bodies through lexical analysis.Finally,our approach dynamically combines these tokens to form and recommend high-quality and project-specific method names.Experimental results over 2111 Java testing methods show that the proposed approach can achieve a Hit Ratio,or Hit@5,of 33.62%and outperform the state-of-the-art approach by 14.12%in suggesting accurate method names.We also demonstrate the effectiveness of structural and lexical analyses in our approach. | Junpeng LUO Jingxuan ZHANG Zhiqiu HUANG Yong XU Chenxing SUN | 2022 | Frontiers of Information Technology & Electronic Engineering2022，23，5： | 0 |
| 10 | Experimental investigation of characteristics of instability evolution in a centrifugal compressor显示文摘The stable range of operation for the centrifugal compressor significantly influences the dynamic,economic,and environment-friendly characteristics of power systems.A deep understand-ing of the characteristics of instability evolution is necessary to improve the compressor stability.A centrifugal compressor equipped with a vaneless diffuser is experimentally investigated using high-response static-pressure measurements.The results obtained indicate that three typical rotational-speed ranges exist based on the different instability evolution characteristics,which reveals the var-ious impeller–diffuser matching behaviors over the entire speed range.At low-speed ranges((40%–75%)N_(max),N_(max)is the maximum rotational speed),the compressor exhibits stable,Rotating Insta-bility(RI),impeller stall(diffuser stall),and surge modes.The impeller stall mode is induced by RI and propagates downstream,resulting in the diffuser stall and compressor surge modes.In the medium-speed range((75%–85%)N_(max)),the compressor exhibits stable,diffuser stall,RI,and surge modes.In the high-speed range((85%–100%)N_(max)),the compressor exhibits stable,diffuser stall,and surge modes.The dominant instability position is shifted from the impeller to the diffuser as the rotational speed increases.Both the impeller and diffuser stall present an irregular sawtooth static-pressure wave and exhibit broadband frequency spectrum patterns. | Hanzhi ZHANG Ce YANG Ben ZHAO Wei ZHAO Chenxing HU Wenli WANG Jianbing GAO Shijun SUN | 2023 | Chinese Journal of Aeronautics2023，36，4： | 0 |
| 11 | Cancer Therapy by Targeting Thioredoxin Reductase Based on Selenium-Containing Dynamic Covalent Bond显示文摘Thioredoxin Reductase(TrxR)plays a pivotal role in defending cells against reactive oxygen species(ROS)and maintaining a reduced intracellular environment.It has been discovered that TrxR is elevated significantly in human cancer,evidenced by its association with the promotion of tumor cell proliferation,inhibiting tumor cell apoptosis,as well as enhancing tumor drug resistance.Hence,finding highly selective inhibitors of TrxR is urgently needed.Herein,we developed a selenium-containing small molecule(EbD),which had two Se–N bonds.Under reduction conditions,the two Se–N bonds reacted with Se–H bond and S–H bond in TrxR to form new Se–Se bond and Se–S bonds,respectively.Subsequently,the newly formed bonds were able to disrupt the thioredoxin(Trx)reduction catalytic cycle,and thus,inhibited the TrxR activity irreversibly,which resulted in the collapse of the antioxidant system.As a consequence,ROS levels elevated that triggered cancer cell apoptosis.This strategy,based on selenium-containing dynamic covalent bonds,provides a new avenue for cancer therapy via targeting TrxR. | Shuojiong Pan Jichun Yang Shaobo Ji Tianyu Li Shiqian Gao Chenxing Sun Huaping Xu | 2020 | CCS Chemistry2020，2，3： | 0 |
| 12 | 6-6 Design of RF System for CIADS Injector II RFQ显示文摘A new RF system for a proton linear accelerator named as C-ADS at Institute of Modern Physics (IMP) hasbeen designed and developed to match its related RFQ cavity, which is a quadrilateral four-vane resonator withtwo separate coupling ports and 80 tuners. Its RF system design including mainly all simulation for coupler andtwo-port configuration have also calculated and analysed to be operated in continuous wave (CW) mode with 120kW forward power resulted from the simulated shunt impedance of 45.62 kΩ and accelerating voltage of 65 kV forRFQ resonator, respectively. The design and measurements for the power source, transmission line, two identicalcouplers and power transmission system, even final two-port configuration were finished in the beginning of 2014.Some valuable experiences were accumulated in the original power conditioning and beam experiments on a previousprototype RFQ, which has 560 keV output energy and one-meter size operated by the end of 2013[1]. Until now,on the new RFQ, almost 120 kW CW power have already put into cavity to accelerate 10 mA proton beam, anoverview of the RF system design is to be given, including some specific simulation, even the two-port couplingconfiguration were analysed and evaluated in the paper. | Sun Liepeng Shi Aimin Zhang Zhouli Xu Xianbo Shi Longbo Li Chenxing Wang Wenbin Lu Liang He Yuan | 2014 | IMP & HIRFL Annual Report2014，，1： | 0 |
| 13 | 6-9 CW Beam Test of the Injector II RFQ for ADS Project显示文摘As one of the main components of the injector II of China ADS LINAC project, an RFQ working at 162.5 MHzis used to accelerate proton beams of 15 mA from 30 keV to 2.1 MeV. The four vane RFQ has been designed incollaboration with Lawrence Berkeley National Laboratory and built at the workshop of the Institute of ModernPhysics, Chinese Academy of Sciences (IMP, CAS). | Zhang Zhouli He Yuan Shi Aimin Sun Liepen Zhang Bin Jia Huan Wang Jing Pan Gang Shi Longbo Xu Xianbo Li Chenxing Wang Wenbin Wang Xianwu Wu Junxia Wu Qi Zhang Junhui Zhu Tieming Guo Yuhui Zhao Hongwei Liu Yong D. Li S. Virostek M. Hoff A. Lambert J. Staples | 2014 | IMP & HIRFL Annual Report2014，，1： | 0 |
| 14 | Fe_(3)C@C/C for catalytic ozonation of silicon-containing wastewater:Dual improvement of silicon resistance and catalytic effect显示文摘The improvement of catalysts’stability under harsh reaction conditions is vital for their practical applica-bility.Herein,iron carbide(Fe_(3)C)nanoparticles were encapsulated in graphitic carbon in situ and a carbon ball served as the carrier.The synthesized Fe_(3)C@C/C was first utilized to treat an m-cresol wastewater containing Si via catalytic ozonation.Compared with the commercial Fe/Al_(2)O_(3)catalyst,the resistance to Si of the Fe_(3)C@C/C was improved 22.68 times,while the TOC removal rate increased by a factor of 2.9,and it remained stable during 10 cycles and 12000 min of continuous reaction,which further demon-strated its potential for diverse applications.The catalyst exhibits improved resistance to Si because of the dual protection from the carbon-encapsulated structure and carbon carrier.Density functional theory calculations show that the encapsulation of Fe_(3)C using carbon significantly increases the resistance to adsorption of Si on its active sites.In addition,the activation of O_(3)is unimpeded on the Fe_(3)C adsorption sites by the protection from C,thus the generation of reactive oxygen species(ROS)by ozone is largely promoted.The mechanism associated with the resistance of the Fe_(3)C@C/C catalyst to Si and its elevated activity are also elucidated. | Shengzhe Wang Lei Ma Rui Wang Chengyu Jin Ying Zhao Xuefei Tan Yanan Zhang Mengyang Liu Chenxing Yao Huangzhao Wei Chenglin Sun | 2023 | Journal of Materials Science & Technology2023，，5： | 0 |
| 15 | LEAF项目建设状态报告显示文摘LEAF or the Low Energy heavy ion Accelerator Facility is a multidiscipline heavy ion research platform under construction at IMP.It is a 5 year National Major Instruments Research Program supported by National Science Foundation of China(NSFC)started in 2015.Oriented to the frontier research in Material Sciences,Astrophysics,Atomic Physics and Highly Charged Ion Physics,LEAF has been designed and constructed with the state of the art technologies for low energy heavy ion acceleration.This facility features a 45 GHz ECR ion source FECR,a heavy ion CW 4-vane radio frequency quadruple accelerator LRFQ,300 kV HV platform,LEBT,MEBT and several dedicated experimental terminals. | Sun Liangting Yang Yao Lu Liang Guo Yuhui Liu Xiaojun Jing Long Li Libin Sun Liepeng Gao Zheng Ma Hongyi Jin Xiaofeng Zhai Yuhan Xu Xianbo Shi Longbo Xing Chaochao Liu Yuting Zhu Tieming Hu Qiang Zhang Peng Zhang Xuezhen Fang Xing Jia Huan Zhang Bin Liu Chaodong Ma Yingming Zhao Bo Wu Beimin Zhu Li Li Jiaqing Lu Wang Guo Junwei Li Chenxing Wang Zhijun Dou Weiping Wu Junxia Zhang Zimin Yao Qinggao Wu Wei Zhou Zhongzu Zhang Junhui Ma Lizhen He Yuan Zhao Hongwei | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 16 | Tailoring carbon chains for repairing graphite from spent lithium-ion battery toward closed-circuit recycling显示文摘Graphite, as a strategic mineral resource, the recycling from spent lithium-ion batteries(LIBs) has attracted considerable attention for meeting considerable economic value. However, closed-circuit recycling still suffers from the lack of effective repair methods. Considering the existing defects, a series of Cchain length carbons have been successfully introduced to repair spent graphite. Obviously, with the evolution of carbon resources, the thickness and pores of the coating layer were tailored with the functional groups. Benefitting from the increased active sites and created fold structure, their coulombic efficiency is obviously restored from 14% to 86.89%, while the stable capacity is kept at approximately 384.9 mAh gafter 100 cycles. Moreover, their excellent rate properties are kept about approximately 200 mAh gat2 C, meeting the standard of commercial materials. Supported by the detailed kinetic behaviors, the enhanced rate is mainly dominated by pseudocapacitive behaviors, accompanied by deepening redox reactions. Meanwhile, the cost of the proposed approach for recycling spent graphite is 894.87 $ t^(-1),and the recycling profit for regenerating graphite is approximately 7000 $ t^(-1). Given this, this work is anticipated to shed light on the closed-circuit recycling of spent graphite and offer significant strategies to repair graphite. | Chenxing Yi Peng Ge Xiqing Wu Wei Sun Yue Yang | 2022 | Journal of Energy Chemistry2022，31，9： | 0 |
| 17 | Flexible multiterminal photoelectronic neurotransistors based on self‐assembled rubber semiconductors for spatiotemporal information processing显示文摘A significant step toward constructing high‐efficiency neuromorphic systems is the electronic emulation of advanced synaptic functions of the human brain.While previous studies have focused on mimicking the basic functions of synapses using single‐gate transistors,multigate transistors offer an opportunity to simulate more complex and advanced memory‐forming behaviors in biological synapses.In this study,a simple and general method is used to assemble rubber semiconductors into suspended two‐phase composite films that are transferred to the surface of the ion‐conducting membrane to fabricate flexible multiterminal photoelectronic neurotransistors.The suspended ion conductive film is used as the gate dielectrics and supporting substrate.The prepared devices exhibit excellent electrical stability and mechanical flexibility after being bent.Basic photoelectronic synaptic behavior and pulse‐dependent plasticity are emulated.Furthermore,the device realizes the spatiotemporally integrated electrical and optical stimuli to mimic spatiotemporal information processing.This study provides a promising direction for constructing more complex spiking neural networks and more powerful neuromorphic systems with brain‐like dynamic spatiotemporal processing functions. | Yunchao Xu Gengming Zhang Wanrong Liu Chenxing Jin Yiling Nie Jia Sun Junliang Yang | 2023 | SmartMat2023，4，2： | 0 |
| 18 | 混合RFQ样机机械设计显示文摘Hybrid RFQ is a spatially periodic structure with RF quadrupoles,which is combined by alternating CH-DTL sections and four-vane RFQ sections.It has higher accelerating efficiency than traditional RFQ,and shows stronger focusing strength than magnetic focusing DTL,especially when accelerating low r=q ions.An aluminium prototype is developed to explore the practicable structure and research on RF parameters of this accelerating structure. | Yu Peiyan Zhang Bin Wang Fengfeng Li Chenxing Wang Zhijun Sun Guozhen He Yuan | 2017 | IMP & HIRFL Annual Report2017，，1： | 0 |
| 19 | LEAF项目建设状态报告显示文摘LEAF or the Low Energy heavy ion Accelerator Facility is a multidiscipline heavy ion research platform constructing at IMP.It is a 5-year National Major Instruments Research Program supported by National Science Foundation of China(NSFC)started in 2015.Oriented to the frontier research in material sciences,astrophysics,atomic physics and highly charged ion physics,LEAF has been designed and constructed with the state-of-the-art technologies for low energy heavy ion acceleration.This facility features a 45 GHz ECR ion source FECR,a heavy ion CW 4-vane radio frequency quadruple accelerator LRFQ,300 kV HV platform,LEBT,MEBT and several dedicated experimental terminals.The layout of LEAF is given in Fig.1. | Sun Liangting Lu Liang Jia Huan Yang Yao Zhang Bin Guo Yuhui Gao Zheng Ma Hongyi Jin Xiaofeng Zhu Tieming Hu Qiang Zhang Peng Zhang Xuezhen Fang Xing Jing Long Liu Chaodong Ma Yingming Zhao Bo Wu Beimin Liu Xiaojun Li Jiaqing Lu Wang Guo Junwei Yang Long Li Libin Sun Liepeng Shi Longbo Li Chenxing Ma Wei Wang Zhijun Dou Weiping Wu Junxia Zhang Zimin Yao Qinggao Wu Wei Zhou Zhongzu Zhang Junhui Ma Lizhen He Yuan Zhao Hongwei | 2017 | IMP & HIRFL Annual Report2017，，1： | 0 |
| 20 | 6-2 New RF System for RFQ Accelerator of C-ADS Injector II显示文摘According to the design for C-ADS,the failure time are limit strictly by several hours in one year.And previous tetrode amplifier has some problems,such as high sparking risk in input/output cavity,running pressure while high intensity current due to no circulator and so on.However,since the dissipated power in RFQ cavity is very high,the Solid-State Amplifier(SSA)must be designed to output very high power in spite of two couplers feeding power into resonator.Finally,two new 80 kW SSAs were decided to develop considering the power margin and beam loading,which were fabricated by two different manufacturers in order to verify the technologies on high power combining. | Sun Liepeng Shi Longbo Xu Xianbo Li Chenxing Zhang Zhouli Wang Wenbin Lu Liang Shi Aimin He Yuan Zhao Hongwei | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
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