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| 1 | Adaptive Backstepping Slide Mode Control of Pneumatic Position Servo System显示文摘With the price decreasing of the pneumatic proportional valve and the high performance micro controller, the simple structure and high tracking performance pneumatic servo system demonstrates more application potential in many fields. However, most existing control methods with high tracking performance need to know the model information and to use pressure sensor. This limits the application of the pneumatic servo system. An adaptive backstepping slide mode control method is proposed for pneumatic position servo system. The proposed method designs adaptive slide mode controller using backstepping design technique. The controller parameter adaptive law is derived from Lyapunov analysis to guarantee the stability of the system. A theorem is testified to show that the state of closed-loop system is uniformly bounded, and the closed-loop system is stable. The advantages of the proposed method include that system dynamic model parameters are not required for the controller design, uncertain parameters bounds are not need, and the bulk and expensive pressure sensor is not needed as well. Experimental results show that the designed controller can achieve better tracking performance, as compared with some existing methods. | REN Haipeng FAN Juntao | 2016 | Chinese Journal of Mechanical Engineering2016，29，5： | 8 |
| 2 | Immune particle swarm optimization of linear frequency modulation in acoustic communication显示文摘With the exploration of the ocean, underwater acoustic communication has attracted more and more attention in recent years. The underwater acoustic channel is considered to be one of the most complicated channels because it suffers from more serious multipath effect, fewer available bandwidths and quite complex noise. Since the signals experience a serious distortion after being transmitted through the underwater acoustic channel,the underwater acoustic communication experiences a high bit error rate(BER). To solve this problem, carrier waveform interdisplacement(CWID) modulation is proposed. It has been proved that CWID modulation is an effective method to decrease BER.The linear frequency modulation(LFM) carrier-waves are used in CWID modulation. The performance of the communication using CWID modulation is sensitive to the change of the frequency band of LFM carrier-waves. The immune particle swarm optimization(IPSO) is introduced to search for the optimal frequency band of the LFM carrier-waves, due to its excellent performance in solving complicated optimization problems. The multi-objective and multipeak optimization nature of the IPSO gives a suitable description of the relationship between the upper band and the lower band of the LFM carrier-waves. Simulations verify the improved performance and effectiveness of the optimization method. | Haipeng Ren Yang Zhao | 2015 | Journal of Systems Engineering and Electronics2015，26，3： | 4 |
| 3 | First experimental constraints on WIMP couplings in the effective field theory framework from CDEX显示文摘We present weakly interacting massive particles(WIMPs) search results performed using two approaches of effective field theory from the China Dark Matter Experiment(CDEX), based on the data from both CDEX-1B and CDEX-10 stages. In the nonrelativistic effective field theory approach, both time-integrated and annual modulation analyses were used to set new limits for the coupling of WIMP-nucleon effective operators at 90% confidence level(C.L.) and improve over the current bounds in the low mχregion. In the chiral effective field theory approach, data from CDEX-10 were used to set an upper limit on WIMP-pion coupling at 90% C.L. We for the first time extended the limit to the m_(χ)<6 GeV/c^(2) region. | Yi Wang Zhi Zeng Qian Yue LiTao Yang KeJun Kang YuanJing Li Mehment Agartioglu HaiPeng An JianPing Chang JingHan Chen YunHua Chen JianPing Cheng Cheng Yi Chiang WenHan Dai Zhi Deng ChangHao Fang XinPing Geng Hui Gong QiuJu Guo XuYuan Guo HongJian He Li He ShengMing He JinWei Hu TuChen Huang HanXiong Huang HaiTao Jia LiPing Jia Xi Jiang HauBin Li JianMin Li Jin Li MingXuan Li RenMingJie Li Xia Li YuLan Li Bin Liao FongKay Lin ShinTed Lin ShuKui Liu YanDong Liu Yu Liu YuanYuan Liu ZhongZhi Liu Hao Ma YuCai Mao QiYuan Nie JinHua Ning Hui Pan NingChun Qi Jie Ren XiChao Ruan ChangSong Shang Vivek Sharma Ze She Lakhwinder Singh Monoj Kumar Singh TianXi Sun ChangJian Tang WeiYou Tang Yang Tian GuangFu Wang Li Wang Qing Wang Yu Chen Wang YunXiang Wang Zhen Wang Henry Tsz-King Wong ShiYong Wu YuCheng Wu HaoYang Xing Yin Xu Tao Xue YuLu Yan Nan Yi ChunXu Yu HaiJun Yu JianFeng Yue Ming Zeng BingTao Zhang Lei Zhang FengShou Zhang ZhenYu Zhang KangKang Zhao MingGang Zhao JiFang Zhou ZuYing Zhou JingJun Zhu | 2021 | Science China(Physics,Mechanics & Astronomy)2021，64，8： | 3 |
| 4 | Synchronization of chaos using radial basis functions neural networks显示文摘The Radial Basis Functions Neural Network (RBFNN) is used to establish the model of a response system through the input and output data of the system. The synchronization between a drive system and the response system can be implemented by employing the RBFNN model and state feedback control. In this case, the exact mathematical model, which is the precondition for the conventional method, is unnecessary for implementing synchronization. The effect of the model error is investigated and a corresponding theorem is developed. The effect of the parameter perturbations and the measurement noise is investigated through simulations. The simulation results under different conditions show the effectiveness of the method. | Ren Haipeng Liu Ding | 2007 | Journal of Systems Engineering and Electronics2007，18，1： | 2 |
| 5 | Nonlinear Feedback Control of Chaos in Permanent Magnet Synchronous Motor显示文摘 | Haipeng Ren Ding Liu | 2006 | IEEE TRANS- ACTIONS ON CIRCUITS AND SYSTEMS-II: EXPRESS BRIEFS2006，53，1： | 1 |
| 6 | A Novel Digital Position Servo System Using DSP and Fuzzy PID显示文摘 | Ren Haipeng Liu Ding | 2001 | Electrical Machines and Systems2001，，： | 1 |
| 7 | Weak signal detection based on chaotic oscillator显示文摘 | Liu Ding Ren Haipeng Song Li | 2005 | IEEE2005，，3： | 1 |
| 8 | Modification of natural graphite for lithium ion batteries显示文摘 | Haipeng Zhao Jianguo Ren Xiangming He Jianjun Li Changyin Jiang Chunrong Wan | 2007 | Solid State Sciences2007，，5： | 1 |
| 9 | Analysis of the selectivity filter of the voltage-gated sodium channel NavRh显示文摘NaChBac 是细菌的电压门钠(Na 显示出顺序类似到电压门钙隧道的 v ) 隧道。理解 Na v 隧道,我们联合了调查 Na v Rh,海洋的细菌的 NaChBac ortholog。二个 Na + 绑定地点在我们的模拟在选择过滤器(SF ) 被识别:首先,途径地点 1 由方面组成了的细胞外的 Na + 离子 Ser181 和 Glu183 组织,然后自发地到达精力充沛地 2 由 Leu179 和 Thr178 的羰基氧形成了的更有利的地点。相反, Ca 2+ 离子对被 Glu183 在地点 1 点套住敏感,它然后堵住 Na + 和 Ca 2+ 的入口到 SF 的门厅。另外, Na + 以一种不均匀的方式通过选择过滤器渗入,类似于哺乳动物的 Na v orthologs。这里报导的学习在哺乳动物的 Na 2+ 上在 Na + 上提供卓见进离子选择的机制 > v 隧道。 | Xu Zhang Mengdie Xia Yang Li Huihui Liu Xin Jiang Wenlin Ren Jianping Wu Paul DeCaen Feng Yu Sheng Huang Jianhua He David E Clapham Nieng Yan Haipeng Gong | 2013 | Cell Research2013，23，3： | 1 |
| 10 | Simulating the ion permeation and ion selection for a eukaryotic voltage-gated sodium channel NavPaS显示文摘 | Juanrong Zhang Wenzhi Mao Yanhui Ren Rui-Ning Sun Nieng Yan Haipeng Gong | 2018 | Protein & Cell2018，9，6： | 1 |
| 11 | Protection of iron against corrosion by coverage with Au nanoparticles and n-hexylthiol mixed films 显示文摘 | Zhe Zhang Shenhao Chen Haipeng Ren | 2009 | Applied Surface Science2009，255，9： | 1 |
| 12 | Chaos control in permanent magnet synchronous motor显示文摘 | Liu Ding Ren Haipeng Liu Xiaoyan | 2004 | Vancouver Canada:International Symposium on Circuits and Systems2004，4，： | 1 |
| 13 | Modification of natural graphite for lithium ion batteries显示文摘 | Haipeng Zhao Jianguo Ren Xiangming He Jianjun Li Changyin Jiang Chunrong Wan | 2007 | Solid State Sciences2007，，5： | 1 |
| 14 | Purification and carbon-film-coating of natural graphite as anode materials for Li-ion batteries显示文摘 | Haipeng Zhao Jianguo Ren Xiangming He Jianjun Li Changyin Jiang Chunrong Wan | 2007 | Electrochimica Acta2007，，19： | 1 |
| 15 | Protection of iron against corrosion by coverage with Au nanoparticles and n -hexylthiol mixed films显示文摘 | Zhe Zhang Shenhao Chen Haipeng Ren Juanjuan Zhou | 2009 | Applied Surface Science2009，，9： | 1 |
| 16 | Kinetic analysis and modeling of maize straw hydrochar combustion using a multi-Gaussian-distributed activation energy model显示文摘Combustion kinetics of the hydrochar was investigated using a multi-Gaussian-distributed activation energy model(DAEM)to ex-pand the knowledge on the combustion mechanisms.The results demonstrated that the kinetic parameters calculated by the multi-Gaussian-DAEM accurately represented the experimental conversion rate curves.Overall,the feedstock combustion could be divided into four stages:the decomposition of hemicellulose,cellulose,lignin,and char combustion.The hydrochar combustion could in turn be divided into three stages:the combustion of cellulose,lignin,and char.The mean activation energy ranges obtained for the cellulose,lignin,and char were 273.7-292.8,315.1-334.5,and 354.4-370 kJ/mol,respectively,with the standard deviations of 2.1-23.1,9.5-27.4,and 12.1-22.9 kJ/mol,re-spectively.The cellulose and lignin contents first increased and then decreased with increasing hydrothermal carbonization(HTC)temperature,while the mass fraction of char gradually increased. | Chunmei Yu Shan Ren Guangwei Wang Junjun Xu Haipeng Teng Tao Li Chunchao Huang Chuan Wang | 2022 | International Journal of Minerals,Metallurgy and Materials2022，29，3： | 1 |
| 17 | Echo state network based symbol detection in chaotic baseband wireless communication显示文摘The Chaotic Baseband Wireless Communication System(CBWCS)is expected to eliminate the Inter-Symbol Interference(ISI)caused by multipath propagation by using the optimal decoding threshold that is the sum of the ISI caused by past decoded bits and the ISI caused by future transmitting bits.However,the current technique is only capable of removing partial effects of the ISI,because only past decoded bits are available for the suboptimal decoding threshold calculation.The unavailability of the future information needed for the optimal decoding threshold is an obstacle to further improve the Bit Error Rate(BER)performance.In contrast to the previous method using Echo State Network(ESN)to predict one future bit,the proposed method in this paper predicts the optimal decoding threshold directly using ESN.The proposed ESN-based threshold prediction method simplifies the symbol decoding operation by avoiding the iterative prediction of the output waveform points using ESN and accumulated error caused by the iterative operation.With this approach,the calculation complexity is reduced compared to the previous ESN-based approach.The proposed method achieves better BER performance compared to the previous method.The reason for this superior result is twofold.First,the proposed ESN is capable of using more future symbols information conveyed by the ESN input to obtain more accurate threshold rather than the previous method in which only one future symbol was available.Second,the proposed method here does not need to estimate the channel information using Least Squared(LS)method,which avoids the extra error caused by inaccurate channel information estimation.Simulation results and experiment based on a wireless open-access research platform under a practical wireless channel show the effectiveness and superiority of the proposed method. | Huiping Yin Chao Bai Haipeng Ren | 2023 | Digital Communications and Networks2023，9，6： | 0 |
| 18 | Free-space beam shaping and steering based on a silicon optical phased array显示文摘In this study,we present a method for free-space beam shaping and steering based on a silicon optical phased array,which addresses the theoretical limitation of traditional bulk optics.We theoretically analyze the beam propagation properties with changes in the applied phase.Different beam profiles can be shaped by varying the phase combination,while a high-order quasi-Bessel beam can be generated with a cubic change to the phase modulation.The simulated results are validated further experimentally,and they match one another well.Beam steering can be achieved with a field of view as large as 140°,which has potential benefits for practical applications.The presented method is expected to have broad application prospects for optical communications,free-space optical interconnects,and light detection and ranging. | WENBO REN QINGQING LIANG JIJUN FENG HAIPENG LIU JIANHUA HU SHUO YUAN XINCHENG XIA WEI JIANG QIWEN ZHAN HEPING ZENG | 2023 | Photonics Research2023，11，12： | 0 |
| 19 | Diffusion effect on the decay of time-resolved photoluminescence under low illumination in lead halide perovskites显示文摘Time-resolved photoluminescence(TRPL)has been extensively used to measure the carrier lifetime in lead halide perovskites.The TRPL curves of perovskite materials are usually fitted with a multi-exponential function,instead of a single exponential one.This was considered to be a result of the surface and the bulk recombination or the additional radiative recombination caused by the high excited carrier density.Here,a new model considering the diffusion and the trap-assisted recombination of carriers is proposed to explain the TRPL curves.The expressions of the TRPL curves and the transient absorption(TA)dynamic curves are theoretically derived,demonstrating that the TRPL curve is an infinite exponential series,regardless of the presence of surface recombination or not.Our newly developed highly sensitive nanosecond TA and TRPL were employed to measure the carrier dynamics of the same sample under low illumination in the linear response region of TA,thereby experimentally verifying our model.These results suggest that the decay of the TRPL is not only a consequence of the carrier recombination but also the carrier diffusion.TRPL cannot provide a direct measurement of the carrier lifetime,whereas TA spectroscopy can.Furthermore,the surface and the bulk recombination can be resolved and the average diffusion coefficient(D)can also be correctly obtained by combining TRPL and TA measurements.We also propose an approximate method for calculating the carrier lifetime and diffusion coefficient of high-quality perovskite films.Our model provides not only a new interpretation of the dynamics of the PL decay but also a deep insight into the carrier dynamics in the nanosecond time scale under working condition of perovskites solar cells. | Huang Li Haipeng Di Xingan Wang Zefeng Ren Ming Lu An-An Liu Xueming Yang Nanlin Wang Yiying Zhao Bohan Li | 2023 | Science China(Physics,Mechanics & Astronomy)2023，66，8： | 0 |
| 20 | Fixed-point ICA algorithm for blind separation of complex mixtures containing both circular and noncircular sources显示文摘Fixed-point algorithms are widely used for independent component analysis(ICA) owing to its good convergence. However, most existing complex fixed-point ICA algorithms are limited to the case of circular sources and result in phase ambiguity, that restrict the practical applications of ICA. To solve these problems, this paper proposes a two-stage fixed-point ICA(TS-FPICA) algorithm which considers complex signal model. In this algorithm, the complex signal model is converted into a new real signal model by utilizing the circular coefficients contained in the pseudo-covariance matrix. The algorithm is thus valid to noncircular sources. Moreover, the ICA problem under the new model is formulated as a constrained optimization problem, and the real fixed-point iteration is employed to solve it. In this way, the phase ambiguity resulted by the complex ICA is avoided. The computational complexity and convergence property of TS-FPICA are both analyzed theoretically. Simulation results show that the proposed algorithm has better separation performance and without phase ambiguity in separated signals compared with other algorithms. TS-FPICA convergences nearly fast as the other fixed-point algorithms, but far faster than the joint diagonalization method, e.g. joint approximate diagonalization of eigenmatrices(JADE). | Yao Junliang Ren Haipeng Liu Qing | 2016 | The Journal of China Universities of Posts and Telecommunications2016，23，2： | 0 |
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