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| 1 | Real-time Health Condition Evaluation on Wind Turbines Based on Operational Condition Recognition显示文摘针对大型风电机组运行工况和状态信息复杂,健康状态难以准确评价的问题,提出基于工况辨识的健康状态实时评价方法。该方法充分考虑机组运行工况的复杂性和多变性,采用工况辨识实现运行工况空间的划分。在各运行工况子空间,建立基于高斯混合模型(gaussianmixturemodel,GMM)多状态特征融合的健康状态评价模型。采用健康衰退指数(healthdegradationindex,HDI)作为机组健康状态评价指标,并给出健康衰退报警限的确定方法。该方法用于某1.5MW风电机组传动系统故障前的健康状态评价。结果表明,该方法提前监测到机组健康状态的衰退趋势,可实现故障的早期预报,避免严重故障发生,并为合理调整运行和安排维修提供依据。 | DONG Yuliang LI Yaqiong CAO Haibin HE Chengbing GU Yujiong | 2013 | 中国电机工程学报2013，33，11： | 12 |
| 2 | Distribution characteristics of seamount cobalt-rich ferromanganese crusts and the determination of the size of areas for exploration and exploitation显示文摘In 2001,the International Seabed Authority (ISBA) initiated the consideration relating to the Regulations for Prospecting and Exploration for Hydrothermal Polymetallic Sulphides and Cobalt-rich Ferromanganese Crusts in the Area at its 7th session.Since then,the consideration of the Regulations has been mainly focused on the size of areas to be allocated for exploration and exploitation of the crusts.This paper,based on the investigation data and the analysis of the distribution characteristics of the crusts,suggests a model for determining the size of areas for exploration and exploitation of the crusts,taking into account various factors such as production scale,crust thickness and grade,mineable area proportion,recovery efficiency,exploration venture,and so on.Through the modeling, the paper suggests that the exploration area (the area covered by each application for approval of a plan of work for exploration of cobalt-rich crusts) shall be 4 856 km 2 and the exploitation area (the mine site area) shall be 1 214 km 2,for 20 years of 1 million wet tonnes annual production. | HE Gaowen MA Weilin SONG Chengbing YANG Shengxiong ZHU Benduo YAO Huiqiang JIANG Xunxiong CHENG Yongshou | 2011 | Acta Oceanologica Sinica2011，30，3： | 9 |
| 3 | Multi-Channel Iterative FDE for Single Carrier Block Transmission over Underwater Acoustic Channels显示文摘Recently, single carrier block transmission(SCBT) has received much attention in high-rate phase-coherent underwater acoustic communication.However,minimum-mean-square-error(MMSE) linear FDE may suffer performance loss in the severely time dispersive underwater acoustic channel. To combat the channel distortion, a novel multi-channel receiver with maximum ratio combining and a low complex T/4 fractional iterative frequency domain equalization(FDE) is investigated to improve diversity gain and the bit error rate(BER) performance. The proposed method has been verified by the real data from a lake underwater acoustic communication test in November 2011. At 1.8 km, the useful data rates are around 1500 and 3000 bits/s for BPSK and QPSK respectively. The results show the improvements of system performance. Compared with MMSE FDE system, the output SNR improvement is 6.9 d B, and the BER is from 10-3 to no error bits for BPSK. The output SNR improvement is 5.3 d B, and the BER is from 1.91×10-2 to 2.2×10-4for QPSK. | HE Chengbing HUO Siyu ZHANG Qunfei WANG Han HUANG Jianguo | 2015 | China Communications2015，12，8： | 3 |
| 4 | M-ary CDMA multiuser underwater acoustic communication and its experimental results显示文摘A novel M-ary code division multiple access (M-ary CDMA) underwater acoustic communication (UAC) that utilizes quasi-orthogonal sequences has been proposed for the multiple mobile unmanned underwater vehicle (UUV).Its performance has been verified in both four-user synchronous and three-user asynchronous scenarios through a lake experiment over a very shallow-water channel.At a chip rate of 2 kilochips per second,good bandwidth efficiency and robust links have been achieved both at 5 and 15 km distances.The performance of M-ary CDMA in mobile condition (3 m/s) is demonstrated by using the recorded lake experimental data. Experimental results show that the proposed scheme is suitable for multi-user communication platform in long-range shallow-water channel with simple receiver algorithms. | HE ChengBing HUANG JianGuo YAN ZhengHua ZHANG QunFei | 2011 | Science China(Information Sciences)2011，54，8： | 3 |
| 5 | Effect of ultrasound with methylene blue as sound sensitive agent on virus inactivation显示文摘The goal of this paper is to explore a method for virus inactivation based on ultrasonic treatment,and on this basis,to explore the synergistic effect of methylene blue as a sonosensitizer in virus inactivation.The titer of human parainfluenza virus type 3(HPIV3),Autographacaliforinica nuclear polyhedrosis virus carried a green fluorescent reporter gene(AcNPV-GFP)and Enterovirus group D 68(EV-D68)were determined by plaque assays or TCID50 methods after treatment by MB combined with illumination(MB photochemical,MBP)or ultrasonic excitation.Different ultrasonic power and time,MB concentration gradient were set to determine the best antiviral combination.For the enveloped virus HPIV3 and AcNPV-GFP,pure ultrasonic or MBP treatment could reduce viral titer more than 104,and ultrasonic combined with MB could completely inactivate HPIV3 and AcNPV-GFP in 5min while traditional MBP methods could only reduce viral titer about 10X.For the nonenveloped virus EV-D68,pure ultrasonic or MBP treatment only reduced the viral titer about 102,but ultrasonic combined with MB treatment could reduce the viral titer about 103 in 5min and completely inactive EV-D68 in 10min(reduced 105).Compared with MBP method and pure ultrasonic inactivation,ultrasonic combined with MB has better inactivation effect on either enveloped or non-enveloped viruses,and the appropriate combination of parameters is expected to be a new blood transfusion transmitted virus inactivation method. | Nan Lu Yunbo Tian Lan Wei Guangyuan Zhang Chengbing Xie Tao He Yongzhu Xu Ziqiu Hu Guixue Wang | 2023 | Medicine in Novel Technology and Devices2023，，1： | 1 |
| 6 | Channel Estimation for OTFS System over Doubly Spread Sparse Acoustic Channels显示文摘This paper addresses sparse channels estimation problem for the generalized linear models(GLM)in the orthogonal time frequency space(OTFS)underwater acoustic(UWA)system.OTFS works in the delay-Doppler domain,where timevarying channels are characterized as delay-Doppler impulse responses.In fact,a typical doubly spread UWA channel is associated with several resolvable paths,which exhibits a structured sparsity in the delayDoppler domain.To leverage the structured sparsity of the doubly spread UWA channel,we develop a structured sparsity-based generalized approximated message passing(GAMP)algorithm for reliable channel estimation in quantized OTFS systems.The proposed algorithm has a lower computational complexity compared to the conventional Bayesian algorithm.In addition,the expectation maximum algorithm is employed to learn the sparsity ratio and the noise variance.Simulation and experimental results show that the proposed algorithm has superior performance and low computational complexity for quantized OTFS systems. | Yang Zhang Qunfei Zhang Chengbing He Chao Long | 2023 | China Communications2023，20，1： | 1 |
| 7 | Implementation of an OFDM underwater acoustic communication system on an underwater vehicle with multiprocessor structure显示文摘Orthogonal frequency division multiplexing(OFDM)can fully use the frequency band and transmit data at high speeds.The ADSP-TS101 is a high performance digital signal processor(DSP)with good properties that include parallel processing and a high speed.Aimed at the real-time processing requirement of the OFDM algorithm,an underwater acoustic communication system with real-time processing capability is carried out.The system is mainly composed of multiple ADSP-TS101s,a multi-channel syn-chronous sample module and a field programmable gate array(FPGA)chip.The multiprocessor structure is made up of a cluster/data flow associated multiprocessing parallel processing structure as the operation kernel,and a multichannel synchronous sample module is designed to realize no phase warp among the multiple channels’data at the same time.The digital modulation/demodulation methods are applied to the OFDM algorithm.Through experiments in a lake,the results show that the system has good stability and real-time processing capability,thus satisfying the design requirements. | YAN Zhenhua HUANG Jianguo HE Chengbing | 2007 | Frontiers of Electrical and Electronic Engineering in China2007，2，2： | 1 |
| 8 | Niao Chao Hill——Study of supporting techniques for China’s first international undersea feature name显示文摘In recent years, Sub-Committee on Undersea Feature Names (SCUFN) has been conducting deliberations on naming undersea features that are entirely or mainly (more than 50%) outside the external limits of the territorial sea,adhering to the principles of not involving sovereignty dispute between countries. | TAO ChunHui LI ShouJun SONG ChengBing CHENG YongShou YANG ChunGuo HE YongHua ZHOU Yang DENG XianMing GAO JinYao QIU Lei | 2012 | Science China Earth Sciences2012，55，10： | 0 |
| 9 | Surface terminals reconstruction:The way to widen the output voltage of MXene-based aqueous symmetrical microsupercapacitors显示文摘The low anodic oxidation potential severely suppresses the output voltage(≤0.6 V)of MXene-based symmetrical aqueous microsupercapacitors(MSA-MSCs)employing acidic electrolytes.Herein,a surface terminals reconstruction mechanism on cathode of MSA-MSCs adopting aqueous neutral electrolyte(1 M Na_(2)SO_(4))is first revealed by systematical electrochemical experiments and in/ex-situ spectral analysis,which indicates that:the-O terminals on Ti3C2Tx flakes of cathode can combine with intercalated Na+cations during charging process to reconstruct into-ONa units to(i)inhibit the splitting reaction of adjacent water molecules,decreasing cathodic hydrogen evolution potential,more significantly,(ii)lower the potential of zero voltage(P0V)between the symmetrical electrodes to avoid anode oxidation,enabling full use of the unexploited potential range of cathode.Thus,the output voltage of the MSA-MSCs tremendously expanded from 0.6 V in acidic polyacrylamide(PAM)/1 M H_(2)SO_(4)hydrogel electrolyte to 1.5 V in neutral polyacrylamide/1 M Na2SO4 hydrogel electrolyte,boosting the corresponding areal energy density from 9.9 to 34.6μW·h·cm^(-2).The demonstrated deep insight on the surface terminals reconstruction mechanism for synchronously modulating the P0V between symmetrical electrodes and hydrogen evolution potential on cathode provides critical guidance for widening the cell voltage of MSA-MSCs with safer and more inexpensive neutral electrolytes. | Yudong Wu Jimin Fu Ningning He Jun Liu Tao Hua Chengbing Qin Haibo Hu | 2023 | Nano Research2023，16，5： | 0 |
| 10 | INFLUENCES ON COUPLED LATERAL AND TORSION VIBRATION BEHAVIOR OF RUB-IMPACT ROTOR BY ROTOR-TO-STATOR CLEARANCE显示文摘With the establishment of the nonlinear coupled lateral and torsion vibration equations of rub-impact Jeffcott rotor and through numerical simulations,the influences on lateral and torsion vibration behavior by rotor-to-stator clearance are analyzed,which prove that there is strong impact on coupled lateral and torsion vibration behavior.Smaller the clearance is,more complex the motion of rotor is.When the clearance is larger,the frequency spectrum of rub-impact rotor is mainly composed of 1/2X,1/3X and 1/4X components.With the decrease of clearance,quasi-periodic and chaotic motions will be present.Under different clearances,the bifurcation diagrams of lateral and torsion vibrations can be divided into rub-free zone,rub-light zone and three complex motion zones in which the motion trend of lateral vibration is similar to that of the torsion vibration.Compared with the lateral vibration,the torsion vibration is of more motion forms and more abundant frequency components in amplitude spectrum. | Gu Yujiong He Chengbing Yang Kun Zhang Jianqiang Department of Power Engineering,North China Electric Power University,Beijing 102206, China | 2004 | Chinese Journal of Mechanical Engineering2004，17，2： | 0 |
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