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| 1 | T cell–associated immunoregulation and antiviral effect of oxymatrine in hydrodynamic injection HBV mouse model显示文摘Although oxymatrine(OMT) has been shown to directly inhibit the replication of hepatitis B virus(HBV) in vitro, limited research has been done with this drug in vivo. In the present study, the antiviral effect of OMT was investigated in an immunocompetent mouse model of chronic HBV infection.The infection was achieved by tail vein injection of a large volume of DNA solution. OMT(2.2, 6.7 and20 mg/kg) was administered by daily intraperitoneal injection for 6 weeks. The efficacy of OMT was evaluated by the levels of HBV DNA, hepatitis B surface antigen(HBs Ag), hepatitis B e antigen(HBe Ag)and hepatitis B core antigen(HBc Ag). The immunoregulatory activity of OMT was evaluated by serum ELISA and flow cytometry. Results shows that OMT at 20 mg/kg inhibited HBV replication, and it was more efficient than entecavir(ETV) in the elimination of serum HBs Ag and intrahepatic HBc Ag. Inaddition, OMT accelerated the production of interferon-γ(IFN-γ) in a dose-dependent manner in CD4^+T cells. Our findings demonstrate the beneficial effects of OMT on the enhancement of immunological function and in the control of HBV antigens. The findings suggest this drug to be a good antiviral therapeutic candidate for the treatment of HBV infection. | Xiuxiu Sang Ruilin Wang Yanzhong Han Cong’en Zhang Honghui Shen Zhirui Yang Yin Xiong Huimin Liu Shijing Liu Ruisheng Li Ruichuang Yang Jiabo Wang Xuejun Wang Zhaofang Bai Xiaohe Xiao | 2017 | Acta Pharmaceutica Sinica B2017，7，3： | 20 |
| 2 | Fast and interpretable classification of small X-ray diffraction datasets using data augmentation and deep neural networks显示文摘X-ray diffraction(XRD)data acquisition and analysis is among the most time-consuming steps in the development cycle of novel thin-film materials.We propose a machine learning-enabled approach to predict crystallographic dimensionality and space group from a limited number of thin-film XRD patterns.We overcome the scarce data problem intrinsic to novel materials development by coupling a supervised machine learning approach with a model-agnostic,physics-informed data augmentation strategy using simulated data from the Inorganic Crystal Structure Database(ICSD)and experimental data.As a test case,115 thin-film metalhalides spanning three dimensionalities and seven space groups are synthesized and classified.After testing various algorithms,we develop and implement an all convolutional neural network,with cross-validated accuracies for dimensionality and space group classification of 93 and 89%,respectively.We propose average class activation maps,computed from a global average pooling layer,to allow high model interpretability by human experimentalists,elucidating the root causes of misclassification.Finally,we systematically evaluate the maximum XRD pattern step size(data acquisition rate)before loss of predictive accuracy occurs,and determine it to be 0.16°2θ,which enables an XRD pattern to be obtained and classified in 5.5 min or less. | Felipe Oviedo Zekun Ren Shijing Sun Charles Settens Zhe Liu Noor Titan Putri Hartono Savitha Ramasamy Brian L.DeCost Siyu I.P.Tian Giuseppe Romano Aaron Gilad Kusne Tonio Buonassisi | 2019 | npj Computational Materials2019，，1： | 15 |
| 3 | Simultaneous pyridine biodegradation and nitrogen removal in an aerobic granular system显示文摘Simultaneous pyridine biodegradation and nitrogen removal were successfully achieved in a sequencing batch reactor(SBR) based on aerobic granules. In a typical SBR cycle, nitritation occurred obviously after the majority of pyridine was removed, while denitrification occurred at early stage of the cycle when oxygen consumption was aggravated. The effect of several key operation parameters, i.e., air flow rate, influent NH_4^+-N concentration,influent p H and pyridine concentration, on nitritation, pyridine degradation and total nitrogen(TN) removal, was systematically investigated. The results indicated that high air flow rate had a positive effect on both pyridine degradation and nitritation but a negative impact of overhigh air flow rate. With the increase of NH_4^+ dosage, both nitritation and TN removal could be severely inhibited. Slightly alkaline condition, i.e., pH 7.0–8.0, was beneficial for both pyridine degradation and nitritation. High pyridine dosage often resulted in the delay of both pyridine degradation and nitritation. Besides, extracellular polymeric substances production was affected by air flow rate, NH_4^+ dosage, pyridine dosage and p H.In addition, high-throughput sequencing analysis demonstrated that Bdellovibrio and Paracoccus were the dominant species in the aerobic granulation system. Coexistence of pyridine degrader, nitrification related species, denitrification related species, polymeric substances producer and self-aggregation related species was also confirmed by highthroughput sequencing. | Xiaodong Liu Shijing Wu Dejin Zhang Jinyou Shen Weiqing Han Xiuyun Sun Jiansheng Li Lianjun Wang | 2018 | Journal of Environmental Sciences2018，30，5： | 7 |
| 4 | Genomic analysis reveals the genetic diversity,population structure,evolutionary history and relationships of Chinese pepper显示文摘Chinese pepper,mainly including Zanthoxylum bungeanum and Zanthoxylum armatum,is an economically important crop popular in Asian countries due to its unique taste characteristics and potential medical uses.Numerous cultivars of Chinese pepper have been developed in China through long-term domestication.To better understand the population structure,demographic history,and speciation of Chinese pepper,we performed a comprehensive analysis at a genome-wide level by analyzing 38,395 genomic SNPs that were identified in 112 cultivated and wild accessions using a high-throughput genomewide genotyping-by-sequencing(GBS)approach.Our analysis provides genetic evidence of multiple splitting events occurring between and within species,resulting in at least four clades in Z.bungeanum and two clades in Z.armatum.Despite no evidence of recent admixture between species,we detected substantial gene flow within species.Estimates of demographic dynamics and species distribution modeling suggest that climatic oscillations during the Pleistocene(including the Penultimate Glaciation and the Last Glacial Maximum)and recent domestication events together shaped the demography and evolution of Chinese pepper.Our analyses also suggest that southeastern Gansu province is the most likely origin of Z.bungeanum in China.These findings provide comprehensive insights into genetic diversity,population structure,demography,and adaptation in Zanthoxylum. | Shijing Feng Zhenshan Liu Yang Hu Jieyun Tian Tuxi Yang Anzhi Wei | 2020 | Horticulture Research2020，7，1： | 6 |
| 5 | Strength and Stability Analysis of Deep Sea Drilling Risers显示文摘In order to analyze the influence of vortex-induced vibration on the strength and stability of marine drilling risers, a simplified analytical model was established and a method for calculating vortex-induced dynamic response was developed. A case study indicated that at primary resonance, first-order dynamic displacement response is greater than higher-order mode responses, but the influence of dynamic moment and shearing force of higher-order modes cannot be ignored. The natural frequency of risers decreased sharply with increasing length of the riser, but increased with increasing top tension. Various factors should be considered to avoid vortex-induced vibration in practical application, and the influence of vortex-induced vibration could be estimated by calculating the fatigue lifetime of riser. | Yang Jin Liu Caihong Liu Hanbin Xie Renjun Cao Shijing | 2007 | Petroleum Science2007，4，2： | 5 |
| 6 | Zanthoxylum-specific whole genome duplication and recent activity of transposable elements in the highly repetitive paleotetraploid Z.bungeanum genome显示文摘Zanthoxylum bungeanum is an important spice and medicinal plant that is unique for its accumulation of abundant secondary metabolites,which create a characteristic aroma and tingling sensation in the mouth.Owing to the high proportion of repetitive sequences,high heterozygosity,and increased chromosome number of Z.bungeanum,the assembly of its chromosomal pseudomolecules is extremely challenging.Here,we present a genome sequence for Z.bungeanum,with a dramatically expanded size of 4.23 Gb,assembled into 68 chromosomes.This genome is approximately tenfold larger than that of its close relative Citrus sinensis.After the divergence of Zanthoxylum and Citrus,the lineage-specific whole-genome duplication event q-WGD approximately 26.8 million years ago(MYA)and the recent transposable element(TE)burst~6.41 MYA account for the substantial genome expansion in Z.bungeanum.The independent Zanthoxylum-specific WGD event was followed by numerous fusion/fission events that shaped the genomic architecture.Integrative genomic and transcriptomic analyses suggested that prominent speciesspecific gene family expansions and changes in gene expression have shaped the biosynthesis of sanshools,terpenoids,and anthocyanins,which contribute to the special flavor and appearance of Z.bungeanum.In summary,the reference genome provides a valuable model for studying the impact of WGDs with recent TE activity on gene gain and loss and genome reconstruction and provides resources to accelerate Zanthoxylum improvement. | Shijing Feng Zhenshan Liu Jian Cheng Zihe Li Lu Tian Min Liu Tuxi Yang Yulin Liu Yonghong Liu He Dai Zujun Yang Qing Zhang Gang Wang Jisen Zhang Huifeng Jiang Anzhi Wei | 2021 | Horticulture Research2021，8，1： | 5 |
| 7 | Phosphorylation of OsFD1 by OsCIPK3 promotes the formation of RFT1-containing florigen activation complex for long-day flowering in rice显示文摘Heading date is a critical trait that determines the regional adaptability and grain productivity of many crops.Although rice is a facultative short-day plant,its domestication led to the Ghd7-Ehd1-Hd3a/RFT1 pathway for adaptation to long-day conditions(LDs).The formation of the'florigen activation complex'(FAC)containing florigen Hd3a has been characterized.However,the molecular composition of the FAC that contains RFT1 for long-day flowering is unclear.We show here that RFT1 forms a ternary FAC with 14-3-3 proteins and OsFD1 to promote flowering under LDs.We identified a calcineurin B-like-interacting protein kinase,OsCIPK3,which directly interacts with and phosphorylates OsFD1,thereby facilitating the localization of the FAC to the nucleus.Mutation in OsCIPK3 results in a late heading date under LDs but a normal heading date under short-day conditions.Collectively,our results suggest that OsCIPK3 phosphorylates OsFD1 to promote RFT1-containing FAC formation and consequently induce flowering in rice under LDs. | Qiang Peng Chunmei Zhu Tao Liu Shuo Zhang Shijing Feng Changyin Wu | 2021 | Molecular Plant2021，14，7： | 4 |
| 8 | Triggering in-plane defect cluster on MoS_(2) for accelerated dinitrogen electroreduction to ammonia显示文摘Electrochemical nitrogen reduction reaction (eNRR) is an alternative promising manner for sustainable N2 fixation with low-emission. The major challenge for developing an efficient electrocatalyst is the cleaving of the stable Ntriple bondN triple bonds. Herein, we design a new MoS_(2) with in-plane defect cluster through a bottom-up approach for the first time, where the defect cluster is composed of three adjacent S vacancies. The well-defined in-plane defect clusters could contribute to the strong chemical adsorption and activation towards inert nitrogen, achieving an excellent eNRR performance with an ammonia yield rate of 43.4 ± 3 μg h^(−1) mgcat.^(−1) and a Faradaic efficiency of 16.8 ± 2% at −0.3 V (vs. RHE). The performance is much higher than that of MoS_(2) with the edge defect. Isotopic labeling confirms that N atoms of produced NH4+ originate from N2. Furthermore, the in-plane defect clusters realized the alternate hydrogenation of nitrogen in a side-on way to synthesize ammonia. This work provides a prospecting strategy for fine-tuning in-plane defects in a catalyst, and also promotes the progress of eNRR. | Wanru Liao Ke Xie Lijuan Liu Xiuyun Wang Yu Luo Shijing Liang Fujian Liu Lilong Jiang | 2021 | Journal of Energy Chemistry2021，30，11： | 3 |
| 9 | Defect passivation by nontoxic biomaterial yields 21% efficiency perovskite solar cells显示文摘Defect passivation is one of the most important strategies to boost both the efficiency and stability of perovskite solar cells(PSCs).Here,nontoxic and sustainable forest-based biomaterial,betulin,is first introduced into perovskites.The experiments and calculations reveal that betulin can effectively passivate the uncoordinated lead ions in perovskites via sharing the lone pair electrons of hydroxyl group,promoting charge transport.As a result,the power conversion efficiencies of the p-i-n planar PSCs remarkably increase from 19.14%to 21.15%,with the improvement of other parameters.The hydrogen bonds of betulin lock methylamine and halogen ions along the grain boundaries and on the film surface and thus suppress ion migration,further stabilizing perovskite crystal structures.These positive effects enable the PSCs to maintain 90%of the initial efficiency after 30 days in ambient air with 60%±5%relative humidity,75%after 300 h aging at 85℃,and 55%after 250 h light soaking,respectively.This work opens a new pathway for using nontoxic and low-cost biomaterials from forest to make highly efficient and stable PSCs. | Shaobing Xiong Tianyu Hao Yuyun Sun Jianming Yang Ruru Ma Jiulong Wang Shijing Gong Xianjie Liu Liming Ding Mats Fahlman Qinye Bao | 2021 | Journal of Energy Chemistry2021，30，4： | 2 |
| 10 | Benchmarking the performance of Bayesian optimization across multiple experimental materials science domains显示文摘Bayesian optimization(BO)has been leveraged for guiding autonomous and high-throughput experiments in materials science.However,few have evaluated the efficiency of BO across a broad range of experimental materials domains.In this work,we quantify the performance of BO with a collection of surrogate model and acquisition function pairs across five diverse experimental materials systems.By defining acceleration and enhancement metrics for materials optimization objectives,we find that surrogate models such as Gaussian Process(GP)with anisotropic kernels and Random Forest(RF)have comparable performance in BO,and both outperform the commonly used GP with isotropic kernels.GP with anisotropic kernels has demonstrated the most robustness,yet RF is a close alternative and warrants more consideration because it is free from distribution assumptions,has smaller time complexity,and requires less effort in initial hyperparameter selection.We also raise awareness about the benefits of using GP with anisotropic kernels in future materials optimization campaigns. | Qiaohao Liang Aldair E.Gongora Zekun Ren Armi Tiihonen Zhe Liu Shijing Sun James R.Deneault Daniil Bash Flore Mekki-Berrada Saif A.Khan Kedar Hippalgaonkar Benji Maruyama Keith A.Brown John Fisher III Tonio Buonassisi | 2021 | npj Computational Materials2021，，1： | 2 |
| 11 | Efficient catalytic removal of COS and H_(2)S over graphitized 2D micro-meso-macroporous carbons endowed with ample nitrogen sites synthesized via mechanochemical carbonization显示文摘Developing a suitable catalyst for the elimination of highly toxic carbonyl sulfide(COS)and hydrogen sulfide(H_(2)S) is of great significance in terms of industrial safety and environmental protection.We demonstrate here the facile synthesis of graphitized 2D micro-meso-macroporous carbons by one-step carbonization of a mixture of urea and glucose at 700–900℃.The as-synthesized graphitized catalysts,designated as 2DNHPC-x(x=urea/glucose mass ratio),are endowed with an ultra-high concentration(12.9–20.2 wt%)of stable and versatile nitrogen sites(e.g.pyrrole and pyridine)which are anchored on the surface via stable covalent bonding.As a result,the 2D-NHPC-x are active in catalytic hydrolysis of COS on pyrrolic N to H_(2)S,and the H_(2)S can be subsequently captured on pyridinic N and converted to elemental sulfur at ambient conditions over the same materials.Among the prepared catalysts,2D-NHPC-x can catalytically hydrolysize 91%of COS to H_(2)S at 30℃,whereas the conversion ratio over the common catalysts g-C_(3)N_(4)and Fe_(2)O_(3)are below 6.0%.Furthermore,these catalysts also exhibit H_(2)S conversion and sulfur selectivity of nearly 100%at 180℃with long-time durability,which is higher than those of the most reported carbonbased catalysts.In contrast,the H_(2)S capacities of activated carbon,ordered mesoporous carbons(OMC)and N-doped OMC are 3.9,1.5 and2.39 mmol g^(-1),respectively.Both the experimental and theoretical results are disclosed that 2D-NHPC-x are superior to the nitrogen-doped porous materials ever applied in simultaneous catalytic elimination of both COS and H_(2)S. | Xun Kan Guanqing Zhang Yingying Luo Fujian Liu Yong Zheng Yihong Xiao Yanning Cao Chak-tong Au Shijing Liang Lilong Jiang | 2022 | Green Energy & Environment2022，7，5： | 1 |
| 12 | Modeling and experiments of a nano-positioning and high frequency scanning piezoelectric platform based on function module actuator显示文摘A piezoelectric platform using function module actuator is presented to achieve nano-positioning and high frequency scanning in large working range. A function module actuator is designed to produce a pair of orthogonal bending deformations and a longitudinal deformation through partition exciting. The bending deformations are used to actuate the planar motion,while the longitudinal deformation is utilized to dynamically adjust the driving force and broaden the scanning frequency. The dynamic model of the platform system is developed. The open-loop performances of a prototype are first tested: a scan frequency of 308 Hz in a scanning range of 3.368 μm×3.396 μm is measured in direct actuation mode,and the displacement resolution is measured to be 16 nm;maximum speed is measured to be 3.38 mm s^-1 in the inertial actuation mode. Furthermore,the closedloop experiments are carried out and a switching strategy is proposed to obtain the switching of the inertial and direct actuation modes automatically;the platform achieves the scanning with frequency of 300 Hz at the set position. | DENG Jie LIU YingXiang ZHANG ShiJing LIU JunKao | 2020 | Science China(Technological Sciences)2020，63，12： | 1 |
| 13 | Synthesis of flower-like Co 3 O 4 –CeO 2 composite oxide and its application to catalytic degradation of 1,2,4-trichlorobenzene显示文摘 | Shijing Lin Guijin Su Minghui Zheng Dekun Ji Manke Jia Yexuan Liu | 2012 | Applied Catalysis B: Environmental2012，，： | 1 |
| 14 | Design of a linear-rotary ultrasonic motor for optical focusing inspired by the bionic motion principles of the earthworms显示文摘Multi-motor configuration of multi-DOF(degree of freedom)optical system is a major source of redundant structure,putting a limitation on the simple and miniaturized design.Thus,a novel two-DOF ultrasonic motor(USM)is proposed to provide a feasible method of application in the lens autofocus of the optical system.The proposed USM operates by one longitudinal mode and two orthogonal bending modes,which is inspired by the bionic motion principle of the earthworms.The frequency degeneration among the three working modes is per-formed,and the working principle of the USM is verified via the FEM simulation.A prototype of the two-DOF USM is fabricated,and its mechanical output characteristics are tested.The experimental results indicate that the prototype achieves the maximum rotary and linear speeds of 3319.6 rpm and 57.6 mm/s,respectively.Furthermore,we demonstrate the result of a simple focusing experiment using the prototype and obtain a series of clear pictures,which verifies the feasibility of application in the optical focusing system. | Yingzhi Wang Jie Deng Shijing Zhang He Li Weishan Chen Yingxiang Liu | 2022 | International Journal of Smart and Nano Materials2022，13，2： | 0 |
| 15 | Discovering equations that govern experimental materials stability under environmental stress using scientific machine learning显示文摘While machine learning(ML)in experimental research has demonstrated impressive predictive capabilities,extracting fungible knowledge representations from experimental data remains an elusive task.In this manuscript,we use ML to infer the underlying differential equation(DE)from experimental data of degrading organic-inorganic methylammonium lead iodide(MAPI)perovskite thin films under environmental stressors(elevated temperature,humidity,and light).Using a sparse regression algorithm,we find that the underlying DE governing MAPI degradation across a broad temperature range of 35 to 85℃is described minimally by a second-order polynomial.This DE corresponds to the Verhulst logistic function,which describes reaction kinetics analogous to self-propagating reactions.We examine the robustness of our conclusions to experimental variance and Gaussian noise and describe the experimental limits within which this methodology can be applied.Our study highlights the promise and challenges associated with ML-aided scientific discovery by demonstrating its application in experimental chemical and materials systems. | Richa Ramesh Naik Armi Tiihonen Janak Thapa Clio Batali Zhe Liu Shijing Sun Tonio Buonassisi | 2022 | npj Computational Materials2022，，1： | 0 |
| 16 | Oxygen vacancy defects engineering on Cu-doped Co_(3)O_(4) for promoting effective COS hydrolysis显示文摘The activation of H_(2)O is a key step of the COS hydrolysis,which may be tuned by oxygen vacancy defects in the catalysts.Herein,we have introduced Cu into Co_(3)O_(4) to regulate the oxygen vacancy defect content of the catalysts.In situ DRIFTS and XPS spectra reveal that COS and H_(2)O are adsorbed and activated by oxygen vacancy.The 10 at%Cu doped Co_(3)O_(4) sample(10Cu-Co_(3)O_(4))exhibits the optimal activity,100%of COS conversion at 70℃.The improved oxygen vacancies of CueCo_(3)O_(4) accelerate the activation of H_(2)O to form active -OH.COS binds with hydroxyl to form the intermediate HSCO^(-)_(2),and then the activated-OH on the oxygen vacancy reacts with HSCO^(-)_(2) to form HCO^(-)_(3).Meanwhile,the catalyst exhibits high catalytic stability because copper species(Cu+/Cu^(2+))redox cycle mitigate the sulfation of Co_(3)O_(4)(Co^(2+)/Co^(3+)).Our work offers a promising approach for the rational design of cobalt-related catalysts in the highly efficient hydrolysis COS process. | Guanyu Mu Yan Zeng Yong Zheng Yanning Cao Fujian Liu Shijing Liang Yingying Zhan Lilong Jiang | 2023 | Green Energy & Environment2023，8，3： | 0 |
| 17 | Design and experiments of a small resonant inchworm piezoelectric robot显示文摘A small resonant inchworm piezoelectric robot with six driving feet which are set evenly along the circumference is proposed and tested.A bonded-type structure is adopted to realize a small size.The radial bending vibration mode and longitudinal vibration mode are excited at the same frequency.The superposition of these two vibration modes makes the driving feet produce elliptical motions.And the driving force can be generated by friction coupling between the driving foot and the operating plane.The structure of the robot is designed by finite element simulation.The geometric parameters are adjusted to make the resonant frequencies of the vibration modes as close as possible.The elliptical trajectories generated at the driving feet are discussed in detail.The vibration and motion characteristics of the prototype are tested,and the resonant frequencies of the radial bending mode and the longitudinal vibration mode are degenerated successfully.The optimal working frequency of the prototype is 21.5 kHz.The maximum speed of the prototype is 200 mm/s,and the displacement resolution is 0.71μm.The measured results show that the resonant inchworm piezoelectric robot can be used for fast and high-precision transportation in narrow space. | DENG Jie YANG ChengLin LIU YingXiang ZHANG ShiJing LI Jing MA XueFeng XIE Hui | 2023 | Science China(Technological Sciences)2023，66，3： | 0 |
| 18 | A 3-DOF piezoelectric robot with continuous walking gait aiming at cross-scale smooth motion显示文摘Piezoelectric robots play important roles in the field of micromanipulation, but it is difficult for them to generate steady precision motion at any moment. In order to eliminate the changing inertial force and improve the motion smoothness, this work proposes a piezoelectric robot with continuous walking gait inspired by ants. The idea is verified with theoretical models and numerical simulation, and the performances are evaluated with experiments. The robot is proven to have the ability to generate 3-DOF(dgeree of freedom) continuous smooth motions with constant speeds. The maximum and minimum smooth velocities have a difference of six orders of magnitude, realizing cross-scale velocity control. Besides, the motion resolution reaches several nanometers with the unlimited workspace, so the cross-scale displacement control can be also obtained. Furthermore, with great robustness against varying loads, the stable actuation capability of the robot is more than 22 times of the self-weight. To sum up,the proposed robot generates cross-scale smooth motion in both aspects of displacement and velocity, so it has good prospects in the applications requiring steady precision motion. The design philosophy and research methods in this work can be valuable references for further advances of micromanipulation robots. | YU HongPeng LIU YingXiang DENG Jie ZHANG ShiJing CHEN WeiShan | 2023 | Science China(Technological Sciences)2023，66，1： | 0 |
| 19 | Fractal-based dynamic response of a pair of spur gears considering microscopic surface morphology显示文摘The meshing surfaces of a gear pair are rough from a microscopic perspective and the surface topography will affect the dynamic response.To study the influence of real surface topography on the gear system dynamic performance,this paper es-tablishes a 3-degree of freedom transverse-torsional dynamic model with regard to the morphology of the interface.By fractal theory,the expression of backlash be-tween gears is modified based on the height of asperities.The time-varying sifness is calculated according to the fractal method rather than assuming a constant,which is more realistic.The dimensionless dynamic differ ential equations are established and solved with surface topography affected backlash function and time-varying sifess.The dynamic response of the gear system with respec to fractal dimension and fractal roughness is analyzed. | Xin Yu Yunyun Sun Sheng Liu Shijing Wu | 2021 | International Journal of Mechanical System Dynamics2021，1，2： | 0 |
| 20 | A novel sensitive piezoelectric mass balance used for weightless environment显示文摘A novel sensitive piezoelectric mass balance(PEMB)was developed for using in weightless environment.The mass of the measured object was obtained by detecting the resonant frequency shift of the PEMB.This weighing method was illustrated systematically.In order to build the relationship between the resonant frequency shift and the measured mass,the equivalent stiffness coefficient and the equivalent concentrated mass of the PEMB were analyzed theoretically.The influence of the structural and material parameters on the sensitivity was analyzed,which provided the design reference to improve the sensitivity.The finite-element-method(FEM)static analysis of the PEMB was carried out with ANSYS software to investigate its shock resistance.Furthermore,the vibration test and calibration experiment effectively verified the theoretical analyses results.The developed PEMB holds merits of independence on acceleration field,independence on properties of the measured object and with shock resistance.Consequently,it can be a suitable candidate for measuring mass of solid samples with unknown properties in the weightless environment. | ZHANG ShiJing LIU YingXiang DENG Jie LIU JunKao | 2021 | Science China(Technological Sciences)2021，64，4： | 0 |
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