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| 1 | An increase in corn resistant starch decreases protein fermentation and modulates gut microbiota during in vitro cultivation of pig large intestinal inocula显示文摘High-protein diet could cause an increase in protein fermentation in the large intestine, leading to an increased production of potentially detrimental metabolites. We hypothesized that an increase in corn resistant starch content may attenuate the protein fermentation. The aim of this study was to evaluate the effect of resistant starch on protein fermentation by inocula from large intestine of pigs using in vitro cultivation. Fermentation patterns were analyzed during a 24-h incubation of cecal and colonic digesta with varying corn resistant starch contents, using casein protein as sole nitrogen source. The results showed that the concentration of short-chain fatty acids(SCFA) and cumulative gas production were significantly increased(P < 0.05), while ammonia-nitrogen(NH_3-N) and branched-chain fatty acids(BCFA), which indicated protein fermentation, decreased when the corn resistant starch levels increased(P < 0.05). The copies of total bacteria, Bifidobacterium and Lactobacillus were significantly increased with the increased corn resistant starch levels after incubation(P < 0.05). The copies of the Bifidobacterium and Lactobacillus in cecum were significantly higher than those in colon(P < 0.05). We conclude that the addition of corn resistant starch weakens the protein fermentation by influencing microbial population and reducing protein fermentation in the cecum and colon in vitro. | Xiangyu He Weiwei Sun Ting Ge Chunlong Mu Weiyun Zhu | 2017 | Animal Nutrition2017，，3： | 8 |
| 2 | Modulation of metabolic functions through Cas13d-mediated gene knockdown in liver显示文摘Dear Editor,RNA knockdown in vivo carries significant potential for dis-ease modeling and therapies.Despite the emerging approaches of CRISPR/Cas9-mediated permanent knock out of targeted genes,strategies targeting RNA for disruption are advantageous in the treatment of acquired metabolic disorders when permanent modification of genome DNA is not appropriate,and RNA virus infection diseases when pathogenic DNA is not available(such as SARS-Cov-2 and MERS infections). | Bingbing He Wenbo Peng Jia Huang Hang Zhang Yingsi Zhou Xiali Yang Jing Liu Zhijle Li Chunlong Xu Mingxing Xue Hui Yang Pengyu Huang | 2020 | Protein & Cell2020，11，7： | 7 |
| 3 | Energy efficiency and spectral efficiency tradeoff in downlink dis- tributed antenna systems 显示文摘 | He Chunlong Sheng Bin Zhu Pengcheng | 2012 | IEEE Wireless Commun Lett2012，1，3： | 1 |
| 4 | Distributed Intelligent Reflecting Surfaces-Aided Device-to-Device Communications System显示文摘Intelligent reflecting surface(IRS)is a revolutionizing and promising technology to improve the high transmission rate of the wireless communication systems.Specifically,an IRS consists of a great amount of low-cost passive reflecting elements,which reflect the incident signals to the desired user by collaboratively using passive beamforming.This paper introduces IRSs into a device-to-device(D2D)underlying cellular system to enhance transmission rate performance of the D2D pairs.We formulate an optimization problem of maximizing the transmission rate of the D2D pairs while satisfying the minimum required rate of the cellular users.We address this problem by jointly optimizing the reuse indicator,received beamforming,power allocation,and phase shift matrices.Block coordinate descent(BCD)algorithm is adopted to decouple the original problem into four subproblems.Closed form solutions are obtained by solving the sub-problems of optimizing the received beamforming and power allocation.Then,Kuhn-Munkres(KM)algorithm and minimization-majorization(MM)algorithm are adopted to solve the sub-problems of optimizing the reuse indicator and phase shift matrices,respectively.Simulation results demonstrate that IRSs can effectively improve the transmission rate of the D2D pairs and our proposed distributed IRSs scheme outperforms the other benchmark schemes. | Chiya Zhang Wenyu Chen Qian Chen Chunlong He | 2021 | Journal of Communications and Information Networks2021，6，3： | 1 |
| 5 | Online Group Recommendation with Local Optimization显示文摘There are some scenarios that need group recommendation such as watching a movie or a TV series,selecting a tourist destination,or having dinner together.Approaches in this domain can be divided into two categories:Creating group profiles and aggregating individual recommender list.Yet none of the above methods can handle the online group recommendation both efficiently and accurately and these methods either strongly limited by their application environment,or bring bias towards those users having limited connections with this group.In this work,we propose a local optimization framework,using sub-group profiles to compute the item relevance.Such method can captures and removes the bias existed in the traditional group recommendation algorithms in a certain degree.It can then be used to derive single-user recommendation.We also propose an approach to overcome the problem caused by dynamic change or user updating about his social network,which detects the target user’s group by analyzing the link types between he and his neighbours,and then use the group information to generate his recommendations.Experimental analysis for group and personal recommendation on three different sizes of MovieLens datasets show fairly good results,our method consistently outperform several state-of-the-arts in efficiency.And we also provide the explanations behind the phenomena during the experiments. | Haitao Zou Yifan He Shang Zheng Hualong Yu Chunlong Hu | 2018 | Computer Modeling in Engineering & Sciences2018，，5： | 1 |
| 6 | The effect of increased atmospheric temperature and CO_2 concentration during crop growth on the chemical composition and in vitro rumen fermentation characteristics of wheat straw显示文摘This experiment was c onducted to investigate the effects of increased atmospheric temperature and CO_2concentration during crop growth on the chemical composition and in vitro rumen fermentation characteristics of wheat straw.The field experiment was carried out from November 2012 to June 2013 at Changshu(31°32'93 'N,120°41'88' E) agro-ecological experimental station.A total of three treatments were set.The concentration of CO_2was increased to 500 umol/mol in the first treatment(CO_2 group).The temperature was increased by 2 ℃ in the second treatment(TEM group) and the concentration of CO_2 and temperature were both increased in the third treatment(CO_2 + TEM group).The mean temperature and concentration of CO_2 in control group were 10.5 ℃ and413 umol/mol.At harvesting,the wheat straws were collected and analyzed for chemical composition and in vitro digestibility.Results showed that dry matter was significantly increased in all three treatments.Ether extracts and neutral detergent fiber were significantly increased in TEM and CO_2 + TEM groups.Crude protein was significantly decreased in CO_2 + TEM group.In vitro digestibility analysis of wheat straw revealed that gas production was significantly decreased in CO_2 and CO_2 + TEM groups.Methane production was significantly decreased in TEM and CO_2 + TEM groups.Ammonia nitrogen and microbial crude protein were significantly decreased in all three treatments.Total volatile fatty acids were significantly decreased in CO_2 and CO_2 + TEM groups.In conclusion,the chemical composition of the wheat straw was affected by temperature and CO_2 and the in vitro digestibility of wheat straw was reduced,especially in the combined treatment of temperature and CO_2. | Xiangyu He Yanping Wu Min Cai Chunlong Mu Weihong Luo Yanfen Cheng Weiyun Zhu | 2015 | Journal of Animal Science and Biotechnology2015，6，4： | 1 |
| 7 | Gulong shale oil enrichment mechanism and orderly distribution of conventional–unconventional oils in the Cretaceous Qingshankou Formation,Songliao Basin,NE China显示文摘Through the study of organic matter enrichment,hydrocarbon generation and accumulation process of black shale of the Cretaceous Qingshankou Formation in the Songliao Basin,the enrichment mechanism of Gulong shale oil and the distribution of conventional–unconventional oil are revealed.The Songliao Basin is a huge interior lake basin formed in the Early Cretaceous under the control of the subduction and retreat of the western Pacific plate and the massive horizontal displacement of the Tanlu Fault Zone in Northeast China.During the deposition of the Qingshankou Formation,strong terrestrial hydrological cycle led to the lake level rise of the ancient Songliao Basin and the input of a large amount of nutrients,resulting in planktonic bacteria and algae flourish.Intermittent seawater intrusion events promoted the formation of salinization stratification and anoxic environment in the lake,which were beneficial to the enrichment of organic matters.Biomarkers analysis confirms that the biogenic organic matter of planktonic bacteria and algae modified by microorganisms plays an important role in the formation of high-quality source rocks with high oil generation capability.There are four favorable conditions for the enrichment of light shale oil in the Qingshankou Formation of the Gulong Sag,Songliao Basin:the moderate organic matter abundance and high oil potential provide sufficient material basis for oil enrichment;high degree of thermal evolution makes shale oil have high GOR and good mobility;low hydrocarbon expulsion efficiency leads to a high content of retained hydrocarbons in the source rock;and the confinement effect of intra-layer cement in the high maturity stage induces the efficient accumulation of light shale oil.The restoration of hydrocarbon accumulation process suggests that liquid hydrocarbons generated in the early(low–medium maturity)stage of the Qingshankou Formation source rocks accumulated in placanticline and slope after long-distance secondary migration,forming high-quality conventional and tight oil reservoirs.Light oil generated in the late(medium–high maturity)stage accumulated in situ,forming about 15 billion tons of Gulong shale oil resources,which finally enabled the orderly distribution of conventional–unconventional oils that are contiguous horizontally and superposed vertically within the basin,showing a complete pattern of“whole petroleum system”with conventional oil,tight oil and shale oil in sequence. | ZHANG Shuichang ZHANG Bin WANG Xiaomei FENG Zihui HE Kun WANG Huajian FU Xiuli LIU Yuke YANG Chunlong | 2023 | Petroleum Exploration and Development2023，50，5： | 0 |
| 8 | Multi-UAV Trajectory Design and Power Control Based on Deep Reinforcement Learning显示文摘In this paper,multi-unmanned aerial vehicle(multi-UAV)and multi-user system are studied,where UAVs are served as aerial base stations(BS)for ground users in the same frequency band without knowing the locations and channel parameters for the users.We aim to maximize the total throughput for all the users and meet the fairness requirement by optimizing the UAVs’trajectories and transmission power in a centralized way.This problem is non-convex and very difficult to solve,as the locations of the user are unknown to the UAVs.We propose a deep reinforcement learning(DRL)-based solution,i.e.,soft actor-critic(SAC)to address it via modeling the problem as a Markov decision process(MDP).We carefully design the reward function that combines sparse with non-sparse reward to achieve the balance between exploitation and exploration.The simulation results show that the proposed SAC has a very good performance in terms of both training and testing. | Chiya Zhang Shiyuan Liang Chunlong He Kezhi Wang | 2022 | Journal of Communications and Information Networks2022，7，2： | 0 |
| 9 | Reflecting Surface-Aided Device-to-Device Communications System显示文摘Intelligent reflecting surface(IRS)is a promising technology for its capability of reflecting the incident signal towards the desired user.IRS can improve the efficiency of wireless communication systems.This paper introduces IRS into a device-to-device(D2D)communications system to improve the throughput of the D2D network.We adopt the block coordinate descent al-gorithm and semidefinite relaxation technique to optimize the beamforming vector,power allocation and phase shift matrix.Simulation results demonstrate that IRS is able to enhance the throughput of the D2D communications system,and the proposed algorithm significantly outper-forms the other benchmark algorithms. | Chiya Zhang Wenyu Chen Chunlong He Xingquan Li | 2020 | Journal of Communications and Information Networks2020，5，4： | 0 |
| 10 | Energy Efficiency of Distributed Antenna Systems with D2D Communications Under Imperfect CSI显示文摘In this paper,we investigate the distributed antenna systems(DAS)based on device to device(DASD2D)communications under the imperfect channel state information(CSI).Our aim is to maximize the energy efficiency(EE)of the D2D users equipment(DUE)under the constraints of the maximum transmission power of D2D pairs and the quality of service(QoS)requirements of the cellular user equipment(CUE).The worst-case design is considered so that the QoS of the CUE can be guaranteed for every realization of the CSI error in the ellipsoid region.The EE objective function of the optimization problem is non-convex and non-linear,and thus this problem cannot be solved by the traditional optimization methods.To solve this problem,first we transform it to an EE maximization problem without uncertain parameters by exploiting the Markov and Cauchy-Schwartz inequality.Then using the fractional programming theory and difference of convex functions optimization method,the robust EE maximization algorithms based on the hard and soft protection method are developed to maximize the system’s EE performance,respectively.However,these two algorithms are designed at the cost of the reduced EE of the DUE.Therefore,in order to further improve the EE performance and make a trade-off between the EE performance and the robustness,the iterative update algorithms for the total power constraint and average interference constraint are developed to maximize the system’s EE performance,respectively.Simulation results demonstrate the effectiveness of the four proposed EE algorithms and illustrate the trade-off between the EE performance and robustness for the iterative update algorithms. | Chunlong He Fangyan Zeng Chiya Zhang Cunhua Pan Daquan Feng Fu-Chun Zheng | 2020 | Journal of Communications and Information Networks2020，5，1： | 0 |
| 11 | Power Minimization for the IRS-Aided SWIPT Secure Communication System with Imperfect Cascaded Channel显示文摘Intelligent reflecting surface(IRS)-assisted simultaneous wireless information and power transfer(SWIPT)is a promising technology for prolonging the lifetime of the users and improving system performance.However,it is challenging to obtain the perfect channel state information(CSI)at the base station(BS)due to the lack of radio frequency(RF)chains at the IRS,which becomes even harder when eavesdroppers(Eves)exist.In this paper,we study the power issues in the IRS-aided SWIPT system under the imperfect CSI of BS-IRS-Eves links.We aim to minimize the transmitting power at the BS by jointly designing transmit beamforming and reflective beamforming with subject to the rate outage probability constraints of the Eves,the energy harvesting constraints of the energy receivers(ERs),and the minimum rate constraints of the information receivers(IRs).We use Bernstein-type inequality to solve the rate outage probability constraints.Afterward,the formulated nonconvex problem can be efficiently tackled by employing alternating optimization(AO)combined with semidefinite relaxation(SDR)and penalty convex-concave procedure(CCP).Numerical results demonstrate the effectiveness of the proposed scheme. | Chunlong He Shuqiong Xu Gongbin Qian Xingquan Li Chiya Zhang | 2023 | Journal of Communications and Information Networks2023，8，2： | 0 |
| 12 | In situ preparation of visible-light-driven carbon quantum dots/NaBiO3 hybrid materials for the photoreduction of Cr(Ⅵ)显示文摘In this study,different carbon quantum dots(CQDs)/NaBiO3 hybrid materials were synthesized as photocatalysts to effectively utilize visible light for the photocatalytic degradation of contaminants effectively.These hybrid materials exhibit an enhanced photocatalytic reduction of hexavalent chromium(Cr(Ⅵ))in the aqueous medium.Zero-dimensional nanoparticles of CQDs were embedded within the two-dimensional NaBiO3 nanosheets by the hydrothermal process.Compared with that of the pure NaBiO3 nanosheets,the photocatalytic performance of the hybrid catalysts was significantly high and 6 wt.%CQDs/NaBiO3 catalyst exhibited better photocatalytic performance.We performed the first-principles density functional theory calculations to study the interfacial properties of pure NaBiO3 nanosheets and hybrid photocatalysts,and confirmed the CQDs played an important role in the CQDs/NaBiO3 composites.The experimental results indicated that the enhanced reduction of Cr(Ⅵ)was probably due to the high loading of CQDs(electron acceptor)on NaBiO3,which made NaBiO3 nanomaterials to respond in visible light and significantly improved their electron-hole separation efficiency. | Yixiao Wu Chunlong Chen Shu He Xuesong Zhao Shaobin Huang Gongchang Zeng Yingying You Ying Cao Lishan Niu | 2021 | Journal of Environmental Sciences2021，33，1： | 0 |
| 13 | 射频超导腔体在线清洗显示文摘In 2018,detailed studies on RF induced plasma for the in-situ cleaning of the HWR cavity were conducted to improve the performance of the cavity.For the purpose of cleaning the HWR cavities in cryomodule,an apparatus for the discharge experiments was designed at room temperature,which duplicates the assembly of cavities inside cryomodule,where the FPC was used for power coupling. | Wu Andong Huang Shichun Yang Lei Hua Chuanfei Li Chunlong Tan Teng Xiong Pingran Guo Hao Yue Weiming Pan Feng Chen Long Zhang Shenghu He Yuan Zhao Hongwei | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 14 | Statistical characteristics of spray autoignition of transient kerosene jet in cross flow显示文摘To study statistical characteristics of the random spray autoignition,aviation kerosene was injected transiently into non-vitiated air crossflow in a flow reactor with optical accesses.The operating conditions were relevant to gas turbine combustor:the air crossflow pressure and temperature were in the range of 1.4-1.7 MPa and 830-947 K,respectively,and the jet-tocrossflow momentum flux ratios were 20,50 and 80.Statistical distributions of random ignition delay times with adequate convergence were estimated based on histograms.The dependences of the distributions on reactor pressure,temperature,and jet-to-crossflow momentum flux ratio were studied.The results show that the resulting distributions appear more concentrated with the increase of air temperature or jet-to-crossflow momentum flux ratio.And then the correlations for the mean and standard deviation of the ignition delay time sample data were developed based on the present results.Compared with the correlations of ignition delay time of homogeneous premixed gas-phase kerosene/air mixture reported in the literature,the results show a greater significance pressure dependence and lower temperature sensitivity of the ignition delay time of nonpremixed kerosene spray. | Chi ZHANG Chunlong HE Xin XUE Yuzhen LIN Jibao LI Chongchong LIU | 2021 | Chinese Journal of Aeronautics2021，34，12： | 0 |
| 15 | Investigation of solution chemistry to enable efficient lithium recovery from low-concentration lithium-containing wastewater显示文摘In the production of lithium-ion batteries(LIBs)and recycling of spent LIBs,a large amount of low-concentration lithium-containing wastewater(LCW)is generated.The recovery of Li from this medium has attracted significant global attention from both the environmental and economic perspectives.To achieve effective Li recycling,the features of impurity removal and the interactions among different ions must be understood.However,it is generally dificult to ensure highly efficient removal of impurity ions while retaining Li in the solution for further recovery.In this study,the removal of typical impurity ions from LCW and the interactions between these species were systematically investigated from the thermodynamic and kinetics aspects.It was found that the main impurities(e.g.,Fe^+,AIP^+,Ca^2+,and Mg^2+)could be efficiently removed with high Li recovery by control-ling the ionic strength of the solution.The mechanisms of Fe^3+,Al^+,Ca^2+,and Mg^2+removal were investigated to identify the controlling steps and reaction kinetics.It was found that the precipitates are formed by a zero-order reaction,and the activation energies tend to be low with a sequence of fast chemical reactions that reach equilibrium very quickly.Moreover,this study focused on Li loss during removal of the impurities,and the corresponding removal rates of Fe^+,Al^+,Ca^2+,and Mg^2+were found to be 99.8%,99.5%,99%,and 99.7%,respectively.Conse-quently,high-purity LisPO4 was obtained via one-step precipitation.Thus,this research demonstrates a potential route for the effective recovery of Li from low-concentra-tion LCW and for the appropriate treatment of acidic LCW. | Chunlong Zhao Mingming He Hongbin Cao Xiaohong Zheng Wenfang Gao Yong Sun He Zhao Dalong Liu Yanling Zhang Zhi Sun | 2020 | Frontiers of Chemical Science and Engineering2020，14，4： | 0 |
| 16 | Development of RF Cavities at the Department of RF Cavity in 2019显示文摘The cavity design including RF design and multi-physics analysis of the RFQ for the CAFe(Chinese Accelerator Facility for super-heavy Elements)project have been completed by the end of 2019. | Zhang Zhouli Yue Weiming Li Chenxing Li Chunlong Huang Yulu Wang Ruoxu Xu Xianbo Zhang Shengxue Zhang Shenghu He Tao Yang Lei Xing Chaochao Lin Zeqiang | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 17 | 650 MHz Elliptical Cavities Development in IMP for CiADS显示文摘Multicell superconducting radio frequency(SRF)elliptical cavities are proposed for efficient acceleration of proton beam in the Chinese initiative Accelerator Driven Subcritical System(CiADS). | Huang Yulu Wang Ruoxu Liu Lubei Jiang Tiancai Zhang Shengxue Liu Shuhui Tan Teng Guo Hao Li Chunlong Yue Weiming Zhang Zhouli Wang Zhijun Zhang Shenghu He Yuan | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 18 | 6-5 Operation of HWRs for C-ADS Injector显示文摘There are two types of HWR cavities have been developed in IMP for C-ADS Injector.HWR010s have been used to accelerate proton from 2.1 MeV to 10 MeV.There are 12 HWR010s assembled in two CMs.The taper type HWR015s have been used to accelerate proton from 10MeV to 18.5 MeV.There are 5 HWRs assembled in the third CM.Proton beam has been accelerated to 26 MeV by HWR010,HWR015 and Spoke021 in June 2017.The beam has been accelerated to 18.5 MeV by HWR010 and HWR015.The CMs in the tunnel are shown in Fig.1. | Yue Weiming Zhang Shenghu Li Yongming Chang Wei Jiang Tiancai Zhang Shengxue Gao Zheng Wang Ruoxue Huang Shichun Pan Feng Chen Long Li Chunlong Song Yukun Guo Hao Xiong Pingran Cong Zhang Tan Teng Wan Yuqin Niu Xiaofei Bai Feng Hu Chuanfei Zhang Peng Liu Lubei Huang Yulu Zhao Yugang Guo Xiaohong You Zhiming Zhang Junhui Huang Guirong He Yuan | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
| 19 | 6-10 Evaluation of Power Loss on the NC QWR Cavity of a New Room-temperature Test Stand for Couplers显示文摘Room-temperature test with high power is an essential step before couplers are installed on superconducting cavities.A new room-temperature test stand is being designed at IMP.The new stand will be assembled with a NC(normal-conducting)QWR cavity.The power loss on the cavity when couplers are conditioned in traveling-wave mode has to be thoroughly evaluated.Fig.1 demonstrates the power flow in traveling-wave conditioning mode.Pe1 and Pe2 represent the power that is extracted by couplers.Pf and Pre denote the forward power and reflected power,respectively. | Chen Long Li Yongming Zhang Shenghu Jiang Tiancai Li Chunlong Wang Ruoxu He Yuan | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
| 20 | 6-11 SRF Power Input Coupler for HWR010 at IMP显示文摘The high power superconducting radiofrequency(SRF)input coupler is the connecting part between the SRF cavity and the RF transmission line.With the RF power transferred through the coupler,the SRF cavity can built up the electromagnetic field and then accelerate the beams.In addition to this RF transmission function,it also has to serve as a vacuum barrier for the SRF cavity vacuum.The HWR010 coupler which designed by IHEP is a single ceramic window coupler. | Li Yongming Jiang Tiancai Wang Ruoxu Zhang Shenghu Yue Weiming Xiong Pingran Li Chunlong Liu Lubei Zhang Shengxue Song Yukun He Yuan | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
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