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| 1 | Principle and Experimental Verification of Caudal-fin-type Piezoelectric-stack Pump with Variable-cross-section Oscillating Vibrator显示文摘In the traditional flow-resistance-differential (FRD) type valve-less piezoelectric pump,the generated outflow and pressure are discontinuous because of the inherent periodicity and fluctuation of the pump.To overcome these drawbacks,utilizing the bending vibration of piezoelectric bimorph to drive fluid was conducted.However,our investigation on the current status of this piezoelectric bimorph pump shows that larger driving force and vibration amplitude are required for fluid pumping;the pumping can be realized through the centrifugal force;and the mechanism of fluid pumping is no longer further studied.Based on these cases,the paper designed a piezoelectric-stack pump with variable-cross-section oscillating (VCSO) vibrator by imitating the swing of the caudal-fin of tuna,and the pump is neither the rotating type nor the volumetric type according to the taxonomy.The interaction between the oscillating vibrator and the fluid parcel is firstly analyzed from the viewpoint of momentum conservation,and the analytical expression of pump flow rate is obtained.Then the modal and harmonic response analyses on the vibrator immerged in water are carried out.From the analyses the first two orders resonance frequencies are 832 Hz and 1 939 Hz,respectively,and the peak value of the tip amplitude is 0.6 mm.Laser Doppler vibrometer is used to measure both the frequency and vibration amplitude,and the determined first two orders resonance frequencies are 617 Hz and 1 356 Hz,respectively.The measured tip amplitude reaches to the peak value of 0.3 mm.At last,experimental measurement for the flow rates with different driving frequencies is conducted.The results show that the flow rate can reach 560 mL/min at 1 370 Hz when the pump runs under the backpressure of 30 mm water column.And the flow rate is as much as 560% of that of experiment results carried out by researchers from Brazil.The proposed pump innovates in both theory and taxonomy;in addition,the pump overcomes the drawbacks such as large flow fluctuation and low flow rate in the traditional FRD type pumps,which will help to broaden the application of the valve-less piezoelectric pump. | HU Xiaoqi ZHANG Jianhui HUANG Yi XIA Qixiao HUANG Weiqing ZHAO Chunsheng | 2012 | Chinese Journal of Mechanical Engineering2012，25，1： | 11 |
| 2 | Discovery of a 1.0 Ma Yellow River terrace and redating of the fourth Yellow River terrace in Lanzhou area显示文摘基于在平台上标明日期的风神的黄土 sequence-stratigraphic 部门和 paleomagnetic,我们与在 Dunwashan 平台和 Wuyishan 梯田之间的 1.0 个妈 BP 谎言的年龄发现那一个未被发现的平台。这在那个时期期间记录了一个集中的黄河切口事件。paeomagnetic 标明日期和在第四个黄河平台(T4 ) 上 Wuyishan 黄土节和 Zaoshugou 黄土节标明日期的光学地刺激的光(OSL ) 的结果证明在 Lanzhou 区域的第四个黄河平台的年龄是在 Lanzhou 区域的 0.86 妈梯田。1.0 妈黄河平台的发现和在 Lanzhou 区域的 0.6 妈梯田的年龄的红 ating 提供新卓见进关于黄河的进化的进一步的研究。 | PAN Baotian SU Huai HU Chunsheng HU Xiaofei ZHOU Tian LI Jijun | 2007 | Progress in Natural Science:Materials International2007，17，2： | 7 |
| 3 | A chemo-mechanical model coupled with thermal effect on the hollow core–shell electrodes in lithium-ion batteries显示文摘Electrode is a key component to remain durability and safety of lithium-ion(Li-ion) batteries. Li-ion insertion/removal and thermal expansion mismatch may induce high stress in electrode during charging and discharging processes. In this paper, we present a continuum model based on COMSOL Multiphysics software, which involves thermal, chemical and mechanical behaviors of electrodes. The results show that,because of diffusion-induced stress and thermal mismatch, the electrode geometry plays an important role in diffusion kinetics of Li-ions. A higher local compressive stress results in a lower Li-ion concentration and thus a lower capacity when a particle is embedded another, which is in agreement with experimental observations. | Bin Hu Zengsheng Ma Weixin Lei Youlan Zou Chunsheng Lu | 2017 | Theoretical & Applied Mechanics Letters2017，7，4： | 6 |
| 4 | Denitrification Rate and Controlling Factors for Accumulated Nitrate in the Deep Subsoil of Intensive Farmlands: A Case Study in the North China Plain显示文摘Denitrification in subsoil(to a depth of 12 m) is an important mechanism to reduce nitrate(NO3^-) leaching into groundwater.However, regulating mechanisms of subsoil denitrification, especially those in the deep subsoil beneath the crop root zone, have not been well documented. In this study, soil columns of 0–12 m depth were collected from intensively farmed fields in the North China Plain. The fields had received long-term nitrogen(N) fertilizer inputs at 0(N0), 200(N200) and 600(N600) kg N ha^-1 year^-1. Main soil properties related to denitrification, i.e., soil water content, NO3^-, dissolved organic carbon(DOC), soil organic carbon(SOC),pH, denitrifying enzyme activity(DEA), and anaerobic denitrification rate(ADR), were determined. Statistical comparisons among the treatments were performed. The results showed that NO3^- was more heavily accumulated in the entire soil profile of the N600 treatment, compared to the N0 and N200 treatments. The SOC, DOC, and ADR decreased with increasing soil depth in all treatments,whereas considerable DEA was observed throughout the subsoil. The long-term fertilizer rates affected ADR only in the upper 4 m soil layers. The ADRs in the N200 and N600 treatments were significantly correlated with DOC. Multiple regression analysis indicated that DOC rather than DEA was the key factor regulating denitrification beneath the root zone. Additional research is required to determine if carbon addition into subsoil can be a promising approach to enhance NO3^- denitrification in the subsoil and consequently to mitigate groundwater NO3^- contamination in the intensive farmlands. | YUAN Haijing QIN Shuping DONG Wenxu HU Chunsheng Kiril MANEVSKI LI Xiaoxin | 2019 | Pedosphere2019，29，4： | 5 |
| 5 | The Escherichia coli O157:H7 DNA detection on a gold nanoparticle-enhanced piezoelectric biosensor显示文摘This paper presents development of a quartz crystal microbalance (QCM) biosensor for real-time de- tection of E. coli O157:H7 DNA based on nanogold particles amplification. Many inner Au nanoparticles were immobilized onto the thioled surface of the Au electrode, then more specific thiolated sin- gle-stranded DNA (ssDNA) probes could be fixed through Au-SH bonding. The hybridization was in- duced by exposing the ssDNA probe to the complementary target DNA of E. coli O157:H7 gene eaeA, then resulted in a mass change and corresponding frequency shifts ( △f ) of the QCM. The outer avidin-coated Au nanoparticles could combine with the target DNA to increase the mass. The electro- chemical techniques, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were adopted to manifest and character each step. The target DNA corresponding to 2.0×103 colony forming unit (CFU)/mL E. coli O157:H7 cells can be detected by this biosensor, so it is practical to develop a sensitive and effective QCM biosensor for pathogenic bacteria detection based on specific DNA analy- sis. The piezoelectric biosensing system has potential for further applications, such as food safety and environment monitoring, and this approach lays the groundwork for incorporating the method into an integrated system for in-field bacteria detection. | WANG LiJiang WEI QingShan WU ChunSheng HU ZhaoYing JI Jian WANG Ping | 2008 | Chinese Science Bulletin2008，53，8： | 4 |
| 6 | Principle and Experimental Verification of Novel Dual Driving Face Rotary Ultrasonic Motor显示文摘Existing rotary ultrasonic motors operating in extreme environments cannot meet the requirements of good environmental adaptability and compact structure at same time,and existing ultrasonic motors with Langevin transducers show better environmental adaptability,but size of these motors are usually big due to the radial arrangement of the Langevin transducers.A novel dual driving face rotary ultrasonic motor is proposed,and its working principle is experimentally verified.The working principle of the novel ultrasonic motor is firstly proposed.The 5th in-plane flexural vibration travelling wave,excited by the Langevin transducers around the stator ring,is used to drive the rotors.Then the finite element method is used in the determination of dimensions of the prototype motor,and the confirmation of its working principle.After that,a laser Doppler vibrometer system is used for measuring the resonance frequency and vibration amplitude of the stator.At last,output characteristics of the prototype motor are measured,environmental adaptability is tested and performance for driving a metal ball is also investigated.At room temperature and 200 V(zero to peak) driving voltage,the motor's no-load speed is 80 r/min,the stalling torque is 0.35 N·m and the maximum output power is 0.85 W.The response time of this motor is 0.96 ms at the room temperature,and it decreases or increases little in cold environment.A metal ball driven by the motor can rotate at 210 r/min with the driving voltage 300 V(zero to peak).Results indicate that the prototype motor has a large output torque and good environmental adaptability.A rotary ultrasonic motor owning compact structure and good environmental adaptability is proposed,and lays the foundations of ultrasonic motors' applications in extreme environments. | LU Xiaolong HU Junhui YANG Lin ZHAO Chunsheng | 2013 | Chinese Journal of Mechanical Engineering2013，26，5： | 4 |
| 7 | Detection of collapsed buildings with the aerial images captured from UAV显示文摘In this paper, we present a method of detecting the collapsed buildings with the aerial images which are captured by an unmanned aerial vehicle(UAV) for the postseismic evaluation. Different from the conventional methods that apply the satellite images or the high-altitude UAV for the coarse disaster evaluation over large area, the purpose of this work is to achieve the accurate detection of collapsed buildings in small area from low altitude. By combining the motion and appearance features of collapsed buildings extracted from successive aerial images, each pixel in the input image will be measured by a statistical method where the background pixels will be penalized and the ones of collapsed buildings will be assigned with high value.The candidates of collapsed buildings will be established by integrating the extracted feature points into local groups with the online clustering algorithm. To reduce the false alarm caused by the complex background noise,each predicted candidate will be further verified by the temporal tracking framework where both the trajectory and the appearance of a candidate will be measured. The candidate of collapsed buildings that can survive through long time will be considered as true positive, otherwise rejected as a false alarm. Through extensive experiments, the efficiency and the effectiveness of proposed algorithm have been proved. | Chunsheng HUA Juntong QI Hong SHANG Weijian HU Jianda HAN | 2016 | Science China(Information Sciences)2016，59，3： | 3 |
| 8 | A novel in-plane mode rotary ultrasonic motor显示文摘Ultrasonic motors have the merits of high ratio of torque to volume, high positioning precision, intrinsic holding torque, etc., compared to the conventional electromagnetic motors. There have been several potential applications for this type of motor in aerospace exploration, but bearings and bonding mechanism of the piezoelectric ring in the motors limit the performance of them in the space operation conditions. It is known that the Langevin type transducer has excellent energy efficiency and reliability. Hence using the Langevin type transducer in ultrasonic motors may improve the reliability of piezoelectric motors for space applications. In this study, a novel in-plane mode rotary ultrasonic motor is designed, fabricated, and characterized. The proposed motor operates in in-plane vibration mode which is excited by four Langevin-type bending vibrators separately placed around a ring-shaped stator. Two tapered rotors are assembled to the inner ring of the stator and clamped together by a screw nut. In order to make the motor more stable and convenient to fix, a thin cylindrical support is placed under the stator ring. Due to its no-bearing structure and Langevin transducer excitation, the prototype ultrasonic motor may operate well in aeronautic and astronautic environments. | Lu Xiaolong Hu Junhui Yang Lin Zhao Chunsheng | 2014 | Chinese Journal of Aeronautics2014，27，2： | 3 |
| 9 | A Vesicular Stomatitis Virus-Based Vaccine Carrying Zika Virus Capsid Protein Protects Mice from Viral Infection显示文摘Dear Editor,Zika virus (ZIKV) is a mosquito-borne virus that belongs to the Flavivirus family along with dengue virus (DENV),yellow fever virus, West Nile virus, and Japanese encephalitis virus (Ming et al. 2016). ZIKV is a singlestranded positive-sense RNA virus encoding three structural proteins, including nucleocapsid protein C, prM/M,envelope glycoprotein E, and seven non-structural proteins.Since 2015. | Xiaodan Shi Jingping Hu Jing Guo Chuanjian Wu Sidong Xiong Chunsheng Dong | 2019 | Virologica Sinica2019，34，1： | 2 |
| 10 | The impact of the atmospheric turbulence-development tendency on new particle formation:a common finding on three continents显示文摘A new mechanism of new particle formation(NPF)is investigated using comprehensive measurements of aerosol physicochemical quantities and meteorological variables made in three continents,including Beijing,China;the Southern Great Plains site in the USA;and SMEARⅡStation in Hyytiala,Finland.D espite the considerably different emissions of chemical species among the sites,a common relationship was found between the characteristics of NPF and the stability intensity.The stability parameter(ζ=Z/L,where Z is the height above ground and L is the Monin-Obukhov length)is found to play an important role;it drops significantly before NPF as the atmosphere becomes more unstable,which may serve as an indicator of nucleation bursts.As the atmosphere becomes unstable,the NPF duration is closely related to the tendency for turbulence development,which influences the evolution of the condensation sink.Presumably,the unstable atmosphere may dilute pre-existing particles,effectively reducing the condensation sink,especially at coarse mode to foster nucleation.This new mechanism is confirmed by model simulations using a molecular dynamic model that mimics the impact of turbulence development on nucleation by inducing and intensifying homogeneous nucleation events. | Hao Wu Zhanqing Li Hanqing Li Kun Luo Yuying Wang Peng Yan Fei Hu Fang Zhang Yele Sun Dongjie Shang Chunsheng Liang Dongmei Zhang Jing Wei Tong Wu Xiaoai Jin Xinxin Fan Maureen Cribb Marc L.Fischer Markku Kulmala Tuukka Petaja | 2021 | National Science Review2021，8，3： | 2 |
| 11 | Prediction of Deformation and Footprint of High-speed Rotating Radial Tires显示文摘In this research,the tire deformations due to rotation are divided into three parts:tread,belt and carcass.Tread deformation is obtained by using a rotating hollow cylinder model,belt expansion is calculated according to the laminated composite shell theory,and a formula of dynamic equilibrium profile is built to investigate carcass deformation.Moreover,a simple method is used to predict the footprint changes caused by tire deformation.Results show that a large deformation is occurring at tire shoulder,a smaller one at tread centre,and the shoulder deformations are mostly caused by carcass.Length of footprint side edges increase with tire rolling speed increasing.The predicted tread,belt,carcass deformations and footprint changes are in good agreement with finite element analysis results.The proposed method and the results will offer a helpful guidance to tire and vehicle engineers. | CUI Zhibo CHAI Delong LYU Jiafeng HU Kai ZHANG Chunsheng HOU Dandan WANG Youshan | 2020 | 橡胶工业2020，67，5： | 2 |
| 12 | Yield-scaled N20 emissions in a winter wheat-summer corn double-cropping system显示文摘 | Qin Shuping Wang Yuying Hu Chunsheng | 2012 | Atmospheric Environment2012，55，： | 1 |
| 13 | Identifying tumor stem-like cells in mouse melanoma cell lines by analyzing the characteristics of side population cells显示文摘 | Jun Dou Ping Wen Weihua Hu Yating Li Yun Wu Chunsheng Liu Fengshu Zhao Kai Hu Jing Wang Chuilian Jiang Xiangfeng He Ning Gu | 2009 | Cell Biology International2009，，8： | 1 |
| 14 | Identification, characterization, and molecular application of a virulence-associated autotransporter from a pathogenic Pseudomonasfluorescens swain显示文摘 | HU Yonghua LIU Chunsheng HOU Jinhui | 2009 | Applied and Environmental Microbiology2009，75，13： | 1 |
| 15 | Soil Thermal Conductivity as influenced by aggregation at intermediate water contents 显示文摘 | Ju Zhaoqiong Ren Tusheng Hu Chunsheng | 2011 | Soil Sci Soc Am J2011，75，1： | 1 |
| 16 | Conservation ground water for irrigation in the North China Plain显示文摘 | Zhang Xiying Pei Dong Hu Chunsheng | 2003 | Irrigation Sciences2003，21，： | 1 |
| 17 | An extremely fast and high-power laser diode driver module 显示文摘 | Hu Chunsheng Qin Shiqiao Wang Xingshu | 2005 | Proceedings of SPIE Semiconductor Lasers and Applications U2005，5628，： | 1 |
| 18 | Increased nitrogen use efficiencies as a key mitigation alternative to reduce nitrate leaching in north china plain显示文摘 | Xiaoxin Li Chunsheng Hu Jorge A. Delgado Yuming Zhang Zhiyun Ouyang | 2007 | Agricultural Water Management2007，，1： | 1 |
| 19 | Conserving groundwater for irrigation in the North China Plain显示文摘 | Xiying Zhang Dong Pei Chunsheng Hu | 2003 | Irrigation Science2003，，4： | 1 |
| 20 | SOC esti- mation of EV battery based on improved Thevenin model 显示文摘 | Mao Chunsheng Zhong Shaohua Hu Yunda | 2005 | Technology of Power Supply2005，382，18： | 1 |
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