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1Prefrontal cortex and the dysconnectivity hypothesis of schizophrenia显示文摘Schizophrenia is hypothesized to arise from disrupted brain connectivity. This 'dysconnectivity hypothesis' has generated interest in discovering whether there is anatomical and functional dysconnectivity between the prefrontal cortex(PFC) and other brain regions, and how this dysconnectivity is linked to the impaired cognitive functions and aberrant behaviors of schizophrenia. Critical advances in neuroimaging technologies, including diffusion tensor imaging(DTI) and functional magnetic resonance imaging(f MRI), make it possible to explore these issues. DTI affords the possibility to explore anatomical connectivity in the human brain in vivo and f MRI can be used to make inferences about functional connections between brain regions. In this review, we present major advances in the understanding of PFC anatomical and functional dysconnectivity and their implications in schizophrenia. We then briefl y discuss future prospects that need to be explored in order to move beyond simple mapping of connectivity changes to elucidate the neuronal mechanisms underlying schizophrenia.Yuan Zhou Lingzhong Fan Chenxiang Qiu Tianzi Jiang 2015Neuroscience Bulletin2015,31,2:9
2Surface morphology and electrochemical behaviour of Ti-48Al-2Cr-2Nb alloy in low-concentration salt solution显示文摘Electrochemical machining(ECM) is becoming increasingly important for the efficient machining of parts with a large machining area. This is an addition challenge for ECM because of the very high machining current. To overcome this difficulty, a direct and effective strategy is to adopt the machining mode that uses a low-concentration electrolyte with a low current density.The purpose of this study is to reveal the electrochemical behaviour and surface morphology in low-concentration electrolyte.The polarization behavior of Ti-48Al-2Cr-2Nb is measured by linear sweep voltammetry and cyclic voltammetry curves. The ηω-j curves demonstrate the special dissolution behaviour of Ti-48Al-2Cr-2Nb at low current densities. The surface morphology,surface quality, and dissolution mechanism are analysed in three low-concentration electrolytes at different current densities after the ECM dissolution experiments. The results demonstrate that Ti-48Al-2Cr-2Nb exhibits three unique dissolution morphologies in the three solutions, and we found that the γ-TiAl phase dissolves faster than the α2-Ti3Al phase. These results also show that 1% NaCl solution is more suitable for Ti-48Al-2Cr-2Nb in ECM compared with the other two solutions, considering its good surface quality, low breakdown potential, and high material removal rate. Later, the dissolution process of the sample in 1% NaCl solution at different corrosion times is revealed. Moreover, a dissolution model is proposed for the electrochemical dissolution behaviour of Ti-48Al-2Cr-2Nb in 1% NaCl solution.WANG YuDi XU ZhengYang ZHANG An XU GuangChao ZHANG ChenXiang 2021Science China(Technological Sciences)2021,64,2:3
3A Multi-queue Approach of Energy Efficient Task Scheduling for Sensor Hubs显示文摘With the emergence of Internet of things(IoT), sensor hubs, which integrate data from different sensors, play increasingly important role. Energy efficiency is one of the most important issues for sensor hubs.To attack this challenge, this paper proposes a task scheduling scheme for sensor hubs to improve their energy efficiency. A multi-queue-based framework is designed, and its theoretical model and the corresponding mathematical analyses are presented. By optimizing the model with Lyapunov optimization techniques, an algorithm of energy efficient task scheduling in sensor hubs is proposed.Finally, simulation experiments based on real-life data extracted from Internet of vehicles(IoV) environments are conducted to validate the efficacy of the approach.HUANG Jiwei ZHANG Chenxiang ZHANG Jianbing 2020Chinese Journal of Electronics2020,29,2:3
4Preparation and Corrosion Resistance of Rare Earth Conversion Coatings on AZ91 Magnesium Alloy显示文摘The feasibility of forming Ce-containing rare earth conversion coating (short for RECCs),which is nonpoisonous and green to the environment,onto the AZ91 magnesium alloy surface in order to increase the corrosion resistance was studied. And the optimum technological conditions, such as the appropriate concentrations of the components in the solution,temperature and duration of the coatings formation were also settled. The protection of conversion coatings on magnesium alloy surface was evaluated by moisture/heating test, anodie polarization, etc.XuYue ChenXiang LüZushun LiYingjie 2005Journal of Rare Earths2005,23,1:3
5Structural Comparison and Drug Screening of Spike Proteins of Ten SARS-CoV-2 Variants显示文摘SARS-CoV-2(severe acute respiratory syndrome coronavirus 2)has evolved many variants with stronger infectivity and immune evasion than the original strain,including Alpha,Beta,Gamma,Delta,Epsilon,Kappa,lota,Lambda,and 21H strains.Amino acid mutations are enriched in the spike protein of SARS CoV-2.which plays a crucial role in cell infetion.However,the impact of these mutations on protein structure and function is unclear.Understanding the pathophysiology and pandemic feaures of these SARS-CoV-2 variants requires knowledge of the spike protein structures.Here,we obtained the spike protein structures of 10 main globally endemic SARS CoV-2 strains using AlphaFold2.The clustering analysis based on structural similarity revealed the unique features of the mainly pandemic SARS CoV-2 Delta variants.indicating that structural clusters can reflect the current characteristics of the epidemic more accurately than those based on the protein sequence.The analysis of the binding afinities of ACE2-RBD,antibody-NTD,and antibody-RBD complexes in the different variants revealed that the recognition of antibodies against SI NTD and RBD was decreased in the variants,especally the Delta variant compared with the original strain,which may induce the immune evasion of SARS-CoV-2 variants.Furthermore,by virtual screening the ZINC database against a high-accuracy predicted structure of Delta spike protein and experimental validation,we identified multiple compounds that target S1 NTD and RBD,which might contribute towards the development of clinical anti-SARS-CoV-2 medicines.Our findings provided a basic foundation for future in vitro and in vivo investigations that might speed up the development of potential therapies for the SARS-CoV-2 va riants.Qiangzhen Yang Xuemin Jian Ali Alamdar Shah Syed Aamir Fahira Chenxiang Zheng zijia Zhu Ke Wang Jinmai Zhang Yangin Wen Zhiqiang Li Dun Pan Tingting Lu Zhuo Wang Yongyong Shi 2022Research2022,,2:2
6Study on damage performance of oil storage tank in the basis of modal test and FEA显示文摘Du Guofeng Xu Chenxiang Jia Shanpo 2010Advanced Materials Research2010,16,:1
7A non-wetting and conductive polyethylene dioxothiophene hole transport layer for scalable and flexible perovskite solar cells显示文摘The regulated crystallization of perovskite and highly repeatable preparation are decisive challenges for large-scale flexible perovskite solar cells(PSCs).Herein,we synthesize an oil-soluble poly(3,4-ethylenedioxythiophene)(Oil-PEDOT)as a hole transport layer(HTL).The non-wetting Oil-PEDOT HTL can promote the quality of large-area flexible perovskite films because of its optimized crystallinity and printability.The Oil-PEDOT layer also delivers desirable conductivity and charge transport without a complex doping.Consequently,the flexible PSCs with Oil-PEDOT HTL achieve an efficiency of 19.51%and 16.70%based on 1.05 and 22.50 cm^(2),respectively.Moreover,these large-scale flexible PSCs demonstrate remarkable mechanical robustness,and the efficiency exhibits 93%retention after 7,000 bending cycles.These results show that the Oil-PEDOT is a potentially efficient HTL for fabricating efficient large-scale flexible PSCs.Chenxiang Gong Lin Zhang Xiangchuan Meng Zhi Xing Li Rao Hongyu Wang Zengqi Huang Licheng Tan Ting Hu Xiaotian Hu Yiwang Chen 2021Science China Chemistry2021,64,5:1
8Isolation and characterisation of moderately halophilic bacterium Halomonas ventosae DL7 synthesizing Ectoine as compatible solute显示文摘Daochen Z Lili N Chenxiang W 2007Annals of Microbiology2007,57,3:1
9Half - width of intensity profiles of light scattered from self - affine fractal random surfaces and simulational verifications显示文摘Cheng Chuanfu Liu Chenxiang Teng Shunyun 2002Physics Review E2002,65,61:1
10显示文摘XinXiaogui(忻晓桂) ChenXiang(陈香) ZhouJingjing(周晶晶)eta1 物理学报0,,:1
11Chitosan biopolymer-derived self-powered triboelectric sensor with optimized performance through molecular surface engineering and data-driven learning显示文摘The state-of-the-art triboelectric nanogenerators(TENGs)are constructed with synthetic polymers,curtailing their application prospects and relevance in sustainable technologies.The economically viable transformation and engineering of naturally abundant materials into efficient TENGs for mechanical energy harvesting is meaningful not only for fundamental scientific exploration,but also for addressing societal needs.Being an abundant natural biopolymer,chitosan enables exciting opportunity for low-cost,biodegradable TENG applications.However,the electrical outputs of chitosan-based TENGs are low compared with the devices built with synthetic polymers.Here,we explore the facile molecular surface engineering in chitosan to significantly boost the performance of chitosan-based TENG for enabling the practical applications,for example,self-powered car speed sensor.The molecular surface engineering offers a potentially promising scheme for designing and implementing high-performance biopolymer-based TENGs for selfpowered nanosystems in sustainable technologies.We further explore for the first time the feasibility of data mining approaches to analyze and learn the acquired triboelectric signals from the car speed sensors and predict the relationship between the triboelectric signals and car speed values.Chenxiang Ma Shengjie Gao Xinqi Gao Min Wu Ruoxing Wang Yixiu Wang Zhiyuan Tang Fengru Fan Wenxuan Wu Hong Wan Wenzhuo Wu 2019InfoMat2019,1,1:1
12Researchonkeytechnologiesforbatchpreparationofaluminumfoamslabsbymeltfoamingprocess显示文摘Yuan Wenwen ChenXiang LiuYuan etal 2009RaremetalMaGterialsandEngineering2009,12,38:1
13Tunable terahertz slow light with hybrid coupling of a magnetic toroidal and electric dipole metasurface显示文摘We present a hybrid coupling scheme of a magnetic toroidal and electric dipole metasurface with suppressed radiation loss,which can produce the tunable plasmon-induced transparency(PIT)with an enhanced slow-light effect in the terahertz regime.The terahertz metasurface is constructed by nesting a dual-split ring resonator(DSRR)inside a ring resonator(RR)to exploit the destructive coherence of hybrid electromagnetic mode coupling at the PIT resonance.The polarization-dependence excitation performs the active tunability of a PITinduced group slowing down by rotating the polarization angle,experimentally achieving a maximum group delay of 3.5 ps.Furthermore,the modified terahertz metasurface with a four-split ring resonator(FSRR)nested in an RR is prepared on photoconductive silicon,demonstrating the pump-controllable group delay effect at the PIT resonance.The large group delay from 2.2 to 0.9 ps is dynamically tunable by adjusting the pump power.The experimental results are in good accord with the theoretical simulations.GUANCHAO WANG LI LI CHENXIANG LIU SHUAI LI WENPENG GUO YUEYING JIA ZHENGHAO LI HAO TIAN 2023Photonics Research2023,11,4:0
14Sludge composition and characteristics shaped microbial community and further determined process performance: A study on full-scale thermal hydrolysis-anaerobic digestion processes显示文摘Anaerobic digestion (AD) with thermal hydrolysis (TH) pretreatment is a promising process for excess sludge treatment,while there lacks of the knowledge from full-scale process about the impact of sludge composition and characteristics on microbial community and performance.The sludge physiochemical indices,microbial community and performance data of four full-scale TH-AD plants were characterized,and their relationships was elucidated.The four plants were operated under almost similar total organic loading rate (OLR)but their methanogenesis performance differentiate into two groups,namely superior group(SupG) and the inferior group (Inf G).In both groups,TH effectively solubilized particulate organic compounds,meanwhile raised the ammonia nitrogen (NH_(4)^(+)-N) and volatile fatty acid (VFA) concentration.Compared with the Sup G,thermal hydrolyzed sludge of Inf G had higher level of VFAs,NH_(4)^(+)-N and total chemical oxygen demand (t COD),which showed higher inhibition effect on microbes,leading to a community with lower diversity,lower abundance of carbohydrate degrading functional guild,higher protein degrading one,and methanogens that adapted to limited substrates,and further declined the methane production rate.Thus,it was recommended that OLR alone was not sufficient for controlling the system in design and operation,the concentration of VFAs,NH_(4)^(+)-N and t COD should be equally considered.Their higher concentration,together with the higher abundance of Defluviitoga and Proteiniphilum were recommended as indicators for inferior running condition.Our results proposed that microbial communities played a role of bridge between environmental factors and performance,provided implications for engineering ecology and operational regulation for full-scale sludge TH-AD process.Wei Liu Chenxiang Sun Wei Li Tianle Li Zhan Chen Jiawei Wang Zhengran Ren Xianghua Wen 2024Journal of Environmental Sciences2024,,3:0
15Drivers of microbial beta-diversity in wastewater treatment plants in China显示文摘As one of the most well-documented biogeographic patterns,the distance-decay relation-ship provides insights into the underlying mechanisms driving biodiversity distribution.Al-though wastewater treatment plants(WWTPs)are well-controlled engineered ecosystems,this pattern has been seen among microbial communities in activated sludge(AS).However,little is known about the relative importance of environmental heterogeneity and dispersal limitation in shaping AS microbial community across China;especially they are related to spatial scale and organism types.Here,we assessed the distance-decay relationship based on different spatial scales and microbial phylogenetic groups by analyzing 132 activated sludge(AS)samples across China comprising 3,379,20016S rRNA sequences.Our results in-dicated that the drivers of distance-decay pattern in China were scale-dependent.Microbial biogeographic patterns in WWTPs were mainly driven by dispersal limitation at both local and national scales.In contrast,conductivity,SRT,and pH played dominant roles in shaping AS microbial community compositions at the regional scale.Turnover rates and the drivers of beta-diversity also varied with microorganism populations.Moreover,a quantitative re-lationship between dispersal limitation ratio and AS microbial turnover rate was generated.Collectively,these results highlighted the importance of considering multiple spatial scales and micro-organism types for understanding microbial biogeography in WWTPs and pro-vided new insights into predicting variations in AS community structure in response to environmental disturbance.Bing Zhang Ting Yang Chenxiang Sun Xianghua Wen 2022Journal of Environmental Sciences2022,34,5:0
16Determination of Double Beta Decay Half-Life of 136Xe with the PandaX-4T Natural Xenon Detector显示文摘Precise measurement of two-neutrino double beta decay(DBD)half-life is an important step for the searches of Majorana neutrinos with neutrinoless double beta decay.We report the measurement of DBD half-life of 136xe using the Pandax-4T dual-phase Time Projection Chamber(TPC)with 3.7-tonne natural xenon and the first 94.9-day physics data release.Lin Si Zhaokan Cheng Abdusalam Abdukerim Zihao Bo Wei Chen Xun Chen Yunhua Chen Chen Cheng Yunshan Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu Lisheng Geng Karl Giboni Linhui Gu Xuyuan Guo Ke Han Changda He Jinrong He Di Huang Yanlin Huang Zhou Huang Ruquan Hou Xiangdong Ji Yonglin Ju Chenxiang Li Jiafu Li Mingchuan Li Shu Li Shuaijie Li Qing Lin Jianglai Liu Xiaoying Lu Lingyin Luo Yunyang Luo Wenbo Ma Yugang Ma Yujun Mao Yue Meng Nasir Shaheed Xiaofeng Shang Xuyang Ning Ningchun Qi Zhicheng Qian Xiangxiang Ren Changsong Shang Guofang Shen Wenliang Sun Andi Tan Yi Tao Anqing Wang Meng Wang Qiuhong Wang Shaobo Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Yuehuan Wei Mengmeng Wu Weihao Wu Jingkai Xia Mengjiao Xiao Xiang Xiao Pengwei Xie Binbin Yan Xiyu Yan Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Zhe Yuan Dan Zhang Minzhen Zhang Peng Zhang Shibo Zhang Shu Zhang Tao Zhang Li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou Yong Zhou 2023Research2023,,2:0
17Quantum entangled connectivity and functional connectivity of human brain显示文摘Quantum process may conduce to brain function.Particularly,it was proposed that the Posner molecules,Cag(PO4)6,can serve as neural qubits,which can maintain quantum entanglement between phosphorus nuclei for quite a long time.We study the process from entangled Posner molecules to the synchronized activities of brain.A diffusion model of Posner molecules with appropriate boundary conditions and the mean first arriving time of Posner molecules from one area of brain to another are obtained.We establish linkages between the quantum entangled connectivity of brain and the remaining time of entangled Posner molecules before decoherence.Based on these results,we find direct correlations between entangled Posner molecules and the functional connectivity of human brain.Furthermore,we discover that the quantum entangled connectivity depends on age.You Zhai Linjie Qiu Chenxiang He Lina Wang Jian Zhai 2023International Journal of Biomathematics2023,16,8:0
18Breakthrough detection in electrochemical discharge drilling to enhance machining stability显示文摘Film cooling holes are widely used in aero-engine turbine blades.These blades feature large numbers of holes with complex angles and require a high level of surface integrity.Electrochemical discharge drilling(ECDD)combines the high efficiency of electrical discharge drilling(EDD)with high quality of electrochemical drilling(ECD).However,due to the existence of a variety of energy for material removal,accurate and timely detection of breakthroughs is fraught with difficulties.An insufficient preset setting distance results in a tiny exit aperture,influencing the structure's shape.In addition,the electrode is prone to bending at a large overfeeding distance,causing secondary discharge damaging sidewall surface integrity.This paper compares and analyzes the characteristics of processing waveforms using EDD and ECDD.A novel breakthrough detection method is proposed based on the variance signal of average voltage(VSAV)to increase machining stability and achieve fabrication without a recast layer.This method extracts the fluctuation transformation by calculating the variance of the average.Following signal detection,the overfeeding distance is quantified.An experiment is used to validate the breakthrough detection with 100%accuracy in all tests.The optimum overfeeding distances for hole angles of 0°,30°,and 60° are obtained,and the stable removal of the recast layer is realized.Finally,the effectiveness of the method is verified on a typical workpiece with a double-wall structure and a nickel-based single crystal blade.Tianyu GENG Zhengyang XU Chenxiang ZHANG Jin NING 2023Chinese Journal of Aeronautics2023,36,6:0
19Atmospheric stable and fexible Sn-based perovskite solar cells via a bioinspired antioxidative crystal template显示文摘Sn-based perovskite solar cells(PSCs)demonstrate a potential development in eco-friendly devices due to their hypotoxicity.However,poor stability and crystalline quality are still the challenges for achieving high-performance and long-term operating devices.In this work,inspired by biological protein,nickelporphyrin(Ni-P)with electron cloud on conjugate ring is applied into Sn-based perovskite to prevent perovskite from being eroded.The synergistic effect of water and oxygen is broken in grain boundaries and surface so that the stability of PSCs can be improved obviously,despite there is hardly any barrier for water to erode.Simultaneously,the electron-rich molecules can passivate the defects of perovskite such as iodine vacancy.Moreover,the ester group in Ni-P molecule can bind with SnI;to form complex and then restrain nucleation.Combining with the template effect of 2D molecular,the crystallization of perovskite films is optimized.Therefore,the Sn-based PSCs with Ni-P achieve a stabilized power conversion efficiency(PCE)of 7.79%with negligible hysteresis in fexible devices,respectively.Moreover,the PSCs can maintain 80%of the pristine PCE after 300 h under air environment.Rui Guo Li Rao Qianjin Liu Hongyu Wang Chenxiang Gong Baojin Fan Zhi Xing Xiangchuan Meng Xiaotian Hu 2022Journal of Energy Chemistry2022,31,3:0
20Differences in distributions, assembly mechanisms, and putative interactions of AOB and NOB at a large spatial scale显示文摘Ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) play crucial roles in removing nitrogen from sewage in wastewater treatment plants (WWTPs) to protect water resources. However, the differences in ecological properties and putative interactions of AOB and NOB in WWTPs at a large spatial scale remain unclear. Hence, 132 activated sludge (AS) samples collected from 11 cities across China were studied by utilizing 16S rRNA gene sequencing technology. Results indicated that Nitrosomonas and Nitrosospira accounted for similar ratios of the AOB community and might play nearly equal roles in ammonia oxidation in AS. However, Nitrospira greatly outnumbered other NOB genera, with proportions varying from 94.7% to 99.9% of the NOB community in all WWTPs. Similar compositions and, hence, a low distance–decay turnover rate of NOB (0.035) across China were observed. This scenario might have partly resulted from the high proportions of homogenizing dispersal (~13%). Additionally, drift presented dominant roles in AOB and NOB assembling mechanisms (85.2% and 81.6% for AOB and NOB, respectively). The partial Mantel test illustrated that sludge retention time and temperature were the primary environmental factors affecting AOB and NOB communities. Network results showed that NOB played a leading role in maintaining module structures and node connections in AS. Moreover, most links between NOB and other microorganisms were positive, indicating that NOB were involved in complex symbioses with bacteria in AS.Bing Zhang Chenxiang Sun Huimin Lin Wei Liu Wentao Qin Tan Chen Ting Yang Xianghua Wen 2023Frontiers of Environmental Science & Engineering2023,17,10:0
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