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| 1 | Modeling and optimal energy management of a power split hybrid electric vehicle显示文摘With the combination modes of engine and two electric machines,the power split device allows higher efficiency of the engine.The operation and of a power split HEV are analyzed,and the system dynamic model HEV is established event-driven for HEV forward system simulation dynamics controller design.Considering the mode,the fact the mode that the operation modes of is the are and the the is continuous theory.time-driven this for each structure selection of the controller built and the described finite with hybrid automaton control In control structure,process is depicted by the state mode machine(FSM).The multi-mode switch controller is designed to realize power distribution.Furthermore,vehicle operations programming are optimized,and finite the prediction nonlinear model horizon.predictive control(NMPC)strategy is applied by that implementing the dynamic(DP)and in the Comparative simulation The results optimal demonstrate strategy hybrid in control structure is effective feasible for HEV energy management design.NMPC is superior improving fuel economy. | SHI DeHua WANG ShaoHua Pierluigi Pisu CHEN Long WANG RuoChen WANG RenGuang | 2017 | Science China(Technological Sciences)2017，60，5： | 14 |
| 2 | Fast Marching Method for Microseismic Source Location in Cavern-Containing Rockmass: Performance Analysis and Engineering Application显示文摘Microseismic(MS)event locations are vital aspect of MS monitoring technology used to delineate the damage zone inside the surrounding rock mass.However,complex geological conditions can impose significantly adverse effects on the final location results.To achieve a high-accuracy location in a complex cavern-containing structure,this study develops an MS location method using the fast marching method(FMM)with a second-order difference approach(FMM2).Based on the established velocity model with three-dimensional(3D)discrete grids,the realization of the MS location can be achieved by searching the minimum residual between the theoretical and actual first arrival times.Moreover,based on the calculation results of FMM2,the propagation paths from the MS sources to MS sensors can be obtained using the linear interpolation approach and the Runge–Kutta method.These methods were validated through a series of numerical experiments.In addition,our proposed method was applied to locate the recorded blasting and MS events that occurred during the excavation period of the underground caverns at the Houziyan hydropower station.The location results of the blasting activities show that our method can effectively reduce the location error compared with the results based on the uniform velocity model.Furthermore,the obtained MS location was verified through the occurrence of shotcrete fractures and spalling,and the monitoring results of the in-situ multipoint extensometer.Our proposed method can offer a more accurate rock fracture location and facilitate the delineation of damage zones inside the surrounding rock mass. | Ruochen Jiang Feng Dai Yi Liu Ang Li | 2021 | Engineering2021，7，7： | 10 |
| 3 | Investigation of the influence of intermediate principal stress on the dynamic responses of rocks subjected to true triaxial stress state显示文摘Precisely understanding the dynamic mechanical properties and failure modes of rocks subjected to true triaxial stress state(σ1>σ2>σ3,whereσ1,σ2,andσ3 are the major principal stress,intermediate principal stress,and minor principal stress,respectively)is essential to the safety of underground engineering.However,in the laboratory,it is difficult to maintain the constant true triaxial stress state of rocks during the dynamic testing process.Herein,a numerical servo triaxial Hopkinson bar(NSTHB)was developed to study the dynamic responses of rocks confronted with a true triaxial stress state,in which lateral stresses can maintain constant.The results indicate that the dynamic strength and elastic modulus of rocks increase with the rise of intermediate principal stressσ2,while the dynamic elastic modulus is independent of the dynamic strain rate.Simulated acoustic emission distributions indicate that the intermediate principal stressσ2 dramatically affects dynamic failure modes of triaxial confined rocks.Asσ2 increases,the failure pattern switches from a single diagonal shear zone into two parallel shear zones with a small slant.Moreover,a recent triaxial Hopkinson bar experimental system using three bar pairs is also numerically established,and the measuring discrepancies are identified between the two numerical bar systems.The proposed NSTHB system provides a controllable tool for studying the dynamic triaxial behavior of rocks. | Wei You Feng Dai Yi Liu Hongbo Du Ruochen Jiang | 2021 | International Journal of Mining Science and Technology2021，31，5： | 6 |
| 4 | Fe5C2 nanoparticles as low-cost HER electrocatalyst:the importance of Co substitution显示文摘Constructing and understanding the doping effect of secondary metal in transition metal carbide(TMC)catalysts is pivotal for the design of low-cost hydrogen evolution reaction(HER) electrocatalysts. In this work, we developed a wet-chemistry strategy for synthesizing Co-modified Fe_5C_2 nanoparticles((Fe_(1-x)Cox)_5C_2 NPs) as highly active HER electrocatalysts in basic solution. The structure of(Fe_(1-x)Cox)_5C_2 NPs was characterized by X-ray diffraction(XRD), extended X-ray absorption fine structure spectra(EXAFS) and scanning/transmission electron microscopy(S/TEM), indicating that the isomorphous substitution of cobalt in the lattice of Fe_5C_2.(Fe_(0.75) Co_(0.25))_5C_2 exhibited the best HER activity(174 mV for j = -10 mA/cm^2). Computational calculation results indicate that Co provides the most active site for HER. X-ray adsorption spectra(XAS) studies further suggested that the electron transfer in Fe–C bonds are enhanced by the substitution of Co, which modulates the hydrogen adsorption on the adjacent electronic-enriched carbon, and therefore promotes HER activity. Our results affirm the design of lowcost bimetallic TMCs based HER catalysts. | Siwei Li Pengju Ren Ce Yang Xi Liu Zhen Yin Weizhen Li Hanjun Yang Jian Li Xiaoping Wang Yi Wang Ruochen Cao Lili Lin Siyu Yao Xiaodong Wen Ding Ma | 2018 | Science Bulletin2018，63，20： | 6 |
| 5 | Adaptive chaos clonal evolutionary programming algorithm显示文摘Based on the chaos movement and the clonal selection theory, a novel artificial immune system algorithm, Adaptive Chaos Clonal Evolutionary Programming Algorithm (ACCEP), is proposed in this paper. The new algorithm uses the Logistic Sequence to control the mutation scale and uses the Chaos Mutation Operator to control the clonal selection. Compared with SGA and Clonal Selection Algorithm, ACCEP can enhance the precision and stability, avoid prematurity to some extent, and have the high convergence speed. The results of the experiment indicate that ACCEP has the capability to solve complex machine learning tasks, like Multimodal Function Optimization. | DU Haifeng GONG Maoguo LIU Ruochen JIAO Licheng | 2005 | Science in China(Series F)2005，48，5： | 5 |
| 6 | Toward Eco-friendly Green Organic Semiconductors: Recent Advances in Spiro[fluorene-9,9'-xanthene] (SFX)-Based Optoelectronic Materials and Devices显示文摘 | Mingli Sun Ruochen Xu Linghai Xie Ying Wei Wei Huang | 2015 | Chinese Journal of Chemistry2015，33，8： | 4 |
| 7 | Partial discharge measurement and analysis under lightning impulse superimposed DC voltage in SF6 gas显示文摘The presence of lightning impulses(LIs)on the DC waveform can seriously influence the insulation performance of a GIL system.The waveshape can be a superposition of the DC and impulse waveform.In this study,the behaviour of partial discharge(PD)on an epoxy surface is investigated under DC and LI superimposed voltage in SF6.The lightning impulses with different polarities are superimposed on the epoxy surface under both positive and negative DC voltages,respectively.Positive lightning impulses are superimposed on a negative DC voltage with a 90%of the partial discharge inception voltage(PDIV)magnitude.The number and amplitude of the PDs are used to evaluate the insulation performance.The experimental results show that the LI with a different polarity applied to DC can excite the PDs on the epoxy surface.The excitation effect of positive LI superimposed on negative DC is more significant.According to the impulse amplitude and PD characteristics,the influence of superimposed LI on PD excitation can be divided into three stages.As the superimposed LI increases,the amplitude of the excited PD increases gradually,while the PD number first increases and then decreases.This study is expected to provide reference for manufacture and protection of power equipment. | Haotian Wang Cong He Ruochen Guo Xuan Meng Wenze Yuan Junhao Li | 2022 | High Voltage2022，7，4： | 3 |
| 8 | Drift potential of UAV with adjuvants in aerial applications显示文摘The reduction of pesticide aerial spraying drift is still one of the major challenges in modern agriculture.The aim of this study was to evaluate the drift potential of different types of unmanned aerial vehicle(UAV)and adjuvant products for reducing spray drift in aerial applications.Three types of UAV(3WQF120-12 and 3CD-15 fuel oil powered single-rotor UAV and HY-B-15L battery powered single-rotor UAV)were selected in this study with regular application parameters to compare each spray drift,and 3WQF120-12 fuel oil powered UAV was selected to quantify spray drift of 6 adjuvants dissolved in water under field conditions.Solutions were marked with brillant sulfoflavin dye(BSF)at 0.1%.Petri dishes and rotary impactors were used to collect airborne and sediment drift,respectively.Drift deposits were evaluated by spectrophotometry in order to quantify deposits.The results showed that when the flight height was 1.5-2.0 m above the crop at the flight speed of 4-5 m/s and the average wind speed of 1.63-1.73 m/s,3WQF120-12 fuel oil powered UAV had lower drift potential than the other two types;DV0.5 and percentage of droplets with diameter≤75μm had very significant effects on spray drift percentage(p=0.01);the risk of drift in agricultural spraying could be significantly decreased not only by reducing the percentage of fine droplets but also by changing droplet spectra.Compared to water,Silwet DRS-60,ASFA+B,T1602,Break-thru Vibrant,QF-LY and Tmax could reduce by 65%,62%,59%,46%,42%,and 19%spray drift,respectively.when water without adjuvants were sprayed,90%of drift droplets were located within a range of 10.1 m of the target area while with 0.8%Silwet DRS-60 adjuvant in water,the distance was shortened to 6.4 m. | Xiaonan Wang Xiongkui He Jianli Song Zhichong Wang Changling Wang Shilin Wang Ruochen Wu Yanhua Meng | 2018 | International Journal of Agricultural and Biological Engineering2018，11，5： | 3 |
| 9 | Modeling and test on height adjustment system of electrically-controlled air suspension for agricultural vehicles显示文摘To reduce the damages of pavement,vehicle components and agricultural product during transportation,an electric control air suspension height adjustment system of agricultural transport vehicle was studied by means of simulation and bench test.For the oscillation phenomenon of vehicle height in driving process,the mathematical model of the vehicle height adjustment system was developed,and the controller of vehicle height based on single neuron adaptive PID control algorithm was designed.The control model was simulated via Matlab/Simulink,and bench test was conducted.Results show that the method is feasible and effective to solve the agricultural vehicle body height unstable phenomenon in the process of switching.Compared with other PID algorithms,the single neuron adaptive PID control in agricultural transport vehicle has shorter response time,faster response speed and more stable switching state.The stability of the designed vehicle height adjustment system and the ride comfort of agricultural transport vehicle were improved. | Chen Yuexia Chen Long Wang Ruochen Xu Xing Shen Yujie Liu Yanling | 2016 | International Journal of Agricultural and Biological Engineering2016，9，2： | 3 |
| 10 | S4Net: Single stage salient-instance segmentation显示文摘In this paper, we consider salient instance segmentation. As well as producing bounding boxes,our network also outputs high-quality instance-level segments as initial selections to indicate the regions of interest. Taking into account the category-independent property of each target, we design a single stage salient instance segmentation framework, with a novel segmentation branch. Our new branch regards not only local context inside each detection window but also the surrounding context, enabling us to distinguish instances in the same scope even with partial occlusion.Our network is end-to-end trainable and is fast(running at 40 fps for images with resolution 320 × 320). We evaluate our approach on a publicly available benchmark and show that it outperforms alternative solutions. We also provide a thorough analysis of our design choices to help readers better understand the function of each part of our network. Source code can be found at http://gffzz188fe103f8f1460as6fnbb6fcxfov69fu.ffgz.tsg.suse.edu.cn/Ruochen Fan/S4 Net. | Ruochen Fan Ming-Ming Cheng Qibin Hou Tai-Jiang Mu Jingdong Wang Shi-Min Hu | 2020 | Computational Visual Media2020，6，2： | 2 |
| 11 | 近年中国北方草地变绿受降水增加的驱动显示文摘中国北方的暖湿化是近期的热点话题,然而其对植被生长的影响仍不清楚。本研究基于长时间序列(1982–2018年)数据,研究了归一化植被指数(NDVI)的时间动态及其气候驱动因子之间的关系,以探索近年来气候的暖湿化是否会导致该区植被变绿。我们采用分段回归探测了NDVI的变化趋势是否存在转变点,用Pearson相关分析描述了植被指数与气候因子的关系。最后,采用逐步多元回归方法研究了气候因子对NDVI时间变化的贡献率。研究结果表明,NDVI时间变化趋势的转变点出现在2008年,GIMMS NDVI在1982–2008年略有增加,上升速率为0.00022 yr?1,在2008–2015年上升速率达到0.002 yr?1,MODIS NDVI在2008–2018年上升速率为0.0018 yr?1。降水是NDVI变化的主要驱动因子,气温和饱和水汽压差(VPD)对NDVI的变化影响较小。总体看来,NDVI时间序列变化趋势存在转变点,并且近期气候的暖湿化主导了中国北方草地植被变绿,这为今后更好地预测该地区气候变化下的植被覆盖变化提供了依据。 | Kai Di Zhongmin Hu Mei Wang Ruochen Cao Minqi Liang Genan Wu Ruru Chen Guangcun Hao Yaolong Zhao | 2021 | Journal of Plant Ecology2021，14，5： | 2 |
| 12 | The high diversity of SARS-CoV-2-related coronaviruses in pangolins alerts potential ecological risks显示文摘Understanding the zoonotic origin and evolution history of SARS-CoV-2 will provide critical insights for alerting and preventing future outbreaks.A significant gap remains for the possible role of pangolins as a reservoir of SARS-CoV-2 related coronaviruses(SC2r-CoVs).Here,we screened SC2r-CoVs in 172 samples from 163 pangolin individuals of four species,and detected positive signals in muscles of four Manis javanica and,for the first time,one M.pentadactyla.Phylogeographic analysis of pangolin mitochondrial DNA traced their origins from Southeast Asia.Using in-solution hybridization capture sequencing,we assembled a partial pangolin SC2r-CoV(pangolin-CoV)genome sequence of 22895 bp(MP20)from the M.pentadactyla sample.Phylogenetic analyses revealed MP20 was very closely related to pangolin-CoVs that were identified in M.javanica seized by Guangxi Customs.A genetic contribution of bat coronavirus to pangolin-CoVs via recombination was indicated.Our analysis revealed that the genetic diversity of pangolin-CoVs is substantially higher than previously anticipated.Given the potential infectivity of pangolin-CoVs,the high genetic diversity of pangolin-CoVs alerts the ecological risk of zoonotic evolution and transmission of pathogenic SC2r-CoVs. | Min-Sheng Peng Jian-Bo Li Zheng-Fei Cai Hang Liu Xiaolu Tang Ruochen Ying Jia-Nan Zhang Jia-Jun Tao Ting-Ting Yin Tao Zhang Jing-Yang Hu Ru-Nian Wu Zhong-Yin Zhou Zhi-Gang Zhang Li Yu Yong-Gang Yao Zheng-Li Shi Xue-Mei Lu Jian Lu Ya-Ping Zhang | 2021 | Zoological Research2021，42，6： | 2 |
| 13 | Quantum evolutionary clustering algorithm based on watershed applied to SAR image segmentation显示文摘 | Yangyang Li Hongzhu Shi Licheng Jiao Ruochen Liu | 2012 | Neurocomputing2012，，： | 1 |
| 14 | Paclitaxel-induced stress granules increase LINE-1 mRNA stability to promote drug resistance in breast cancer cells显示文摘Abnormal expression of long interspersed element-1(LINE-1)has been implicated in drug resistance,while our previous study showed that chemotherapy drug paclitaxel(PTX)increased LINE-1 level with unknown mechanism.Bioinformatics analysis suggested the regulation of LINE-1 mRNA by drug-induced stress granules(SGs).This study aimed to explore whether and how SGs are involved in drug-induced LINE-1 increase and thereby promotes drug resistance of triple negative breast cancer(TNBC)cells.We demonstrated that SGs increased LINE-1 expression by recruiting and stabilizing LINE-1 mRNA under drug stress,thereby adapting TNBC cells to chemotherapy drugs.Moreover,LINE-1 inhibitor efavirenz(EFV)could inhibit drug-induced SG to destabilize LINE-1.Our study provides the first evidence of the regulation of LINE-1 by SGs that could be an important survival mechanism for cancer cells exposed to chemotherapy drugs.The findings provide a useful clue for developing new chemotherapeutic strategies against TNBCs. | Xiao Shi Xinxin Si Ershao Zhang Ruochen Zang Nan Yang He Cheng Zhihong Zhang Beijing Pan Yujie Sun | 2021 | The Journal of Biomedical Research2021，35，6： | 1 |
| 15 | A comparative study of different cluster validity indexes 显示文摘 | Liu Ruochen Sun Xiaojuan Jiao Licheng | 2012 | Transactions of the Institute of Measurement and Control2012，34，7： | 1 |
| 16 | Magnetic-programmable organohydrogels with reconfigurable network for mechanical homeostasis显示文摘Synthetic materials with tunable mechanical properties have great potential in soft robotics and biomedical engineering.However,current materials are limited to the mechanical duality altering their mechanical properties only between soft and hard states and lack of consecutively programmable mechanics.Herein,the magnetic-programmable organohydrogels with heterogeneous dynamic architecture are designed by encasing oleophilic ferrofluid droplets into hydrogel matrix.As magnetic field increases,the mechanical properties of organohydrogels can be consecutively modulated owing to the gradual formation of chain-like assembly structures of nanoparticles.The storage modulus G'increases by 2.5 times when magnetic field goes up to 0.35 T.Small-Angle X-ray Scattering(SAXS)confirms the reconfigurable orientation of nanoparticles and the organohydrogels show reversible modulus switching.Besides,the materials also exhibit high stretchability,magnetic actuation behavior and effective self-healing capability.Furthermore,the organohydrogels are applied into the design of effectors with mechanical adaptivity.When subjected to serious external perturbations,the effector can maintain mechanical homeostasis by regulating modulus of organohydrogel under applied magnetic field.Such materials are applicable to homeostatic systems with mechanically adaptive behaviors and programmed responses to external force stimuli. | Yingchao Yang Qian Liu Tianyi Zhao Yunfei Ru Ruochen Fang Yichao Xu Jin Huang Mingjie Liu | 2021 | Nano Research2021，14，1： | 1 |
| 17 | Investigation on hierarchical control for driving stability and safety of intelligent HEV during car-following and lane-change process显示文摘The longitudinal and lateral coordinated control for autonomous vehicles is fundamental to achieve safe and comfortable driving performance.Aiming at this for hybrid electric vehicles(HEV)during the car-following(CF)and lane-change(LC)process while accelerating,a hierarchical control strategy for vehicle stability control is proposed.This new approach is different from the conventional hierarchical control.On the basis of model predictive control(MPC)theory,a two-layer MPC controller is designed at the top level of the control structure.The upper layer is a linear time-varying MPC(LTV-MPC),while the lower layer is a hybrid MPC(HMPC).For the LTV-MPC controller,a control-oriented linear discrete model for HEV is established,which integrates the dynamic model with three degrees of freedom(DOF)and the car-following model.The lower-layer HMPC controller is designed on the basis of the analysis for HEV hybrid characteristics and the modelling for the mixed logic dynamic(MLD)model of the HEV powertrain.As for the bottom level,a control plant including the HEV powertrain model and the 7 DOF nonlinear dynamics of the vehicle body is established.In addition,the system stability is proven.A deep fusion of vehicle dynamics control and energy management is achieved.Compared with LC-ACC control and conventional ACC control,the simulation and the hardware-in-the-loop(HIL)test results under different driving scenarios show that the proposed hierarchical control strategy can effectively maintain lateral stability and safety under severe driving conditions.Additionally,the HEV powertrain output torque and the gear-shift point are coordinated and controlled by the HMPC controller. | ZHOU YaZhou WANG RuoChen DING RenKai SHI DeHua YE Qing | 2022 | Science China(Technological Sciences)2022，65，1： | 1 |
| 18 | Connect Internet with Sensors by 6LoWPAN 显示文摘 | Xu Yang Tan Ruochen Wu Shuai | 2013 | Journal of Networks2013，8，7： | 1 |
| 19 | A particle swarm optimization based simultaneous learning frame- work for clustering and classification 显示文摘 | LIU RUOCHEN CHEN YANGYANG JIAO LICHENG | 2014 | Pattern Recognition2014，47，6： | 1 |
| 20 | Evaluation of aileron actuator reliability with censored data显示文摘For the purpose of enhancing reliability of aileron of Airbus new-generation A350 XWB,an evaluation of aileron reliability on the basis of maintenance data is presented in this paper.Practical maintenance data contains large number of censoring samples, information uncertainty of which makes it hard to evaluate reliability of aileron actuator.Considering that true lifetime of censoring sample has identical distribution with complete sample, if censoring sample is transformed into complete sample, conversion frequency of censoring sample can be estimated according to frequency of complete sample.On the one hand, standard life table estimation and product limit method are improved on the basis of such conversion frequency, enabling accurate estimation of various censoring samples.On the other hand, by taking such frequency as one of the weight factors and integrating variance of order statistics under standard distribution, weighted least square estimation is formed for accurately estimating various censoring samples.Large amounts of experiments and simulations show that reliabilities of improved life table and improved product limit method are closer to the true value and more conservative; moreover, weighted least square estimate(WLSE), with conversion frequency of censoring sample and variances of order statistics as the weights, can still estimate accurately with high proportion of censored data in samples.Algorithm in this paper has good effect and can accurately estimate the reliability of aileron actuator even with small sample and high censoring rate.This research has certain significance in theory and engineering practice. | Li Huaiyuan Zuo Hongfu Liu Ruochen Liu Junqiang Jing Cai | 2015 | Chinese Journal of Aeronautics2015，28，4： | 1 |
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