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| 1 | A Survey on Deep Learning-based Fine-grained Object Classification and Semantic Segmentation显示文摘The deep learning technology has shown impressive performance in various vision tasks such as image classification, object detection and semantic segmentation. In particular, recent advances of deep learning techniques bring encouraging performance to fine-grained image classification which aims to distinguish subordinate-level categories, such as bird species or dog breeds. This task is extremely challenging due to high intra-class and low inter-class variance. In this paper, we review four types of deep learning based fine-grained image classification approaches, including the general convolutional neural networks(CNNs), part detection based,ensemble of networks based and visual attention based fine-grained image classification approaches. Besides, the deep learning based semantic segmentation approaches are also covered in this paper. The region proposal based and fully convolutional networks based approaches for semantic segmentation are introduced respectively. | Bo Zhao Jiashi Feng Xiao Wu Shuicheng Yan | 2017 | International Journal of Automation and computing2017，14，2： | 36 |
| 2 | DYNAMIC ANTI-PLANE PROBLEMS OF PIEZOCERAMICS AND APPLICATIONS IN ULTRASONICS—A REVIEW显示文摘We review theoretical results on anti-plane motions of polarized ceramics based on the linear theory of piezoelectricity. Solutions to dynamic problems of the propagation of bulk acoustic waves (BAW) and surface acoustic waves (SAW), vibrations of finite bodies, and applications to various piezoelectric devices including piezoelectric waveguides, resonators, mass sensors, ?uid sensors, actuators, nondestructive evaluation, power harvesters (generators), transformers, and power transmission through an elastic wall by acoustic waves are discussed. Complications due to material inhomogeneity, initial stress, electromagnetic coupling, electric field gradient and semiconduction are also discussed. The paper cites 82 references. | Jiashi Yang Ji Wang | 2008 | Acta Mechanica Solida Sinica2008，21，3： | 7 |
| 3 | 类胡萝卜素的新功能与临床评估显示文摘 | 李长龄 毕森序 Jiashi Zhu 朱志刚 | 2006 | 上海预防医学2006，18，6： | 7 |
| 4 | Electromechanical Fields Near a Circular PN Junction Between Two Piezoelectric Semiconductors显示文摘We study electromechanical fields near the interface between a circular piezoelectric semiconductor cylinder and another piezoelectric semiconductor in which it is embedded.The cylinder is p-doped. The surrounding material is n-doped. The phenomenological theory of piezoelectric semiconductors consisting of the equations of piezoelectricity and the conservation of charge for holes and electrons is used. The theory is linearized for small carrier concentration perturbations. An analytical solution is obtained, showing the formation of a PN junction near the interface. Various electromechanical fields associated with the junction are calculated. The effects of a few physical parameters are examined. | Yixun Luo Ruoran Cheng Chunli Zhang Weiqiu Chen Jiashi Yang | 2018 | Acta Mechanica Solida Sinica2018，31，2： | 5 |
| 5 | Smashing Tissue Extraction and GC Analysis of Active Fatty Acids from Oil Cake of Perilla Seeds显示文摘Objective To optimize the extraction technology of perilla seeds oil from the oil cake of perilla seeds(OCPS)by using the contents of active fatty acids as evaluation standard.Methods The fatty acids were extracted from OCPS,the residue of perilla seeds after cold-press,by smashing tissue extraction(STE),the new technology selected through comparing with classical leaching extraction(LE),Soxhlet extraction(SE),ultrasonic extraction(UE),and supercritical-CO2 fluid extraction(SFE).For optimized condition of STE,orthogonal test was designed and completed.The contents of five fatty acids in extracted oil and OCPS were determined by GC.Results The optimized extraction parameters were smashing for 1.5 min under extraction power of 150 W and 1:6 of the material/solvent ratio.The contents of five fatty acids in the oils extracted by five techniques from OCPS and determined by GC were as follows:α-linolenic acid(41.12%-51.81%),linoleic acid(15.38%-16.43%),oleic acid (18.93%-27.28%),stearic acid(2.56%-4.01%),and palmitic acid(7.38%-10.77%).Conclusion The results show that STE is the most efficient technology with the highest yield(LE:0.57%;SE:1.03%;UE:0.61%;SFE:0.80%;STE: 1.17%)and shortest time(LE:720 min;SE:360 min;UE:30 min;SFE:120 min;STE:1.5 min)among five tested extraction technologies.It is first reported using STE to extract herbal oil enriched with active fatty acids. | SUN Yan-ling1,LIU Yan-ze2,3,XIAO Han4,WEI Ying-feng4,ZHAO Yu-qing1,5 1.Shenyang Pharmaceutical University,Shenyang 110006,China 2.Bio-organic and Natural Product Laboratory,MRC 311,McLean Hospital/Harvard Medical School,Belmont,MA 02478,USA 3.Institute of Medicinal Plant Development,Chinese Academy of Medical Sciences,Beijing 100193,China 4.Liaoning Jiashi Nutritional Plant Oil Development Co.Ltd.,Shenyang 110035,China 5.Key Laboratory of Structure-Based Drug Design&Discovery,Shenyang Pharmaceutical University,Ministry of Education,Shenyang 110016,China | 2011 | Chinese Herbal Medicines2011，3，1： | 5 |
| 6 | Analysis of thickness-shear and thickness-twist modes of AT-cut quartz acoustic wave resonator and filter显示文摘The thickness-shear(TS) and thickness-twist(TT) vibrations of partially electroded AT-cut quartz plates for acoustic wave resonator and filter applications are theoretically studied. The plates have structural variations in one of the two in-plane directions of the plates only. The scalar differential equations derived by Tiersten and Smythe for electroded and unelectroded AT-cut quartz plates are used, resulting in free vibration resonant frequencies and mode shapes for both fundamental and overtone families of modes. The trapped modes with vibrations, mainly confined in the electroded areas, are found to exist in both the resonator and the filter structures. The numerical results for the trapped modes are presented for different aspect ratios of electrodes and material properties, providing a reference to the design and optimization of quartz acoustic wave resonators and filters. | Zinan ZHAO Zhenghua QIAN Bin WANG Jiashi YANG | 2015 | Applied Mathematics and Mechanics(English Edition)2015，36，12： | 3 |
| 7 | BASIC CURVILINEAR COORDINATE EQUATIONS OF ELECTROELASTIC PLATES UNDER BIASING FIELDS WITH APPLICATIONS IN BUCKLING ANALYSIS显示文摘The authors have developed a two-dimensional model for the extension and flexure response ofelectroelastic plates under biasing fields in a curvilinear coordinate system.Applications of the model in ana-lyzing buckling of two circular piezoelectric plates,one single-layered and the other double-layered,are in-cluded.The analysis indicates that the piezoelectric couphng has a strengthening effect against buckling. | Hu Yuantai Chen Chuanyao Li Guoqing Yang Jiashi Jiang Qing | 2002 | Acta Mechanica Solida Sinica2002，15，3： | 3 |
| 8 | Stress-induced potential barriers and charge distributions in a piezoelectric semiconductor nanofiber显示文摘The performance of a piecewise-stressed ZnO piezoelectric semiconductor nano?ber is studied with the multi-?eld coupling theory. The ?elds produced by equal and opposite forces as well as sinusoidally distributed forces are examined. Speci?c distributions of potential barriers, wells, and regions with effective polarization charges are found. The results are fundamental for the mechanical tuning on piezoelectric semiconductor devices and piezotronics. | Shuaiqi FAN Yuantai HU Jiashi YANG | 2019 | Applied Mathematics and Mechanics(English Edition)2019，40，5： | 3 |
| 9 | Transient Bending Vibration of a Piezoelec trie Semiconductor Nanofiber Under a Suddenly Applied Shear Force显示文摘We study transient bending vibration of a ZnO piezoelec trie semiconduc tor nanofiber fixed at one end with a suddenly applied shear force at the other end.A one-dimensional model based on the phenomenological t heory of piezoelec trie semiconductors consisting of the equations of piezoelectricity coupled to the continuity equation of electrons is used.An approximate theoretical analysis is performed,accompanied by a finite element analysis using COMSOL.The evolutions of deflection,elec trie pot ential and elec tron dist ribution are calculated and examined.It is found that when the fiber reaches its largest deflection,the distributions of the electromechanical fields are qualitatively similar to those in the case of static loading under the same shear force,but the amplitudes of the fields are about twice as large roughly. | Yuxing Liang Wanli Yang Jiashi Yang | 2019 | Acta Mechanica Solida Sinica2019，32，6： | 3 |
| 10 | AN EXACT ANALYSIS OF FORCED THICKNESS-TWIST VIBRATIONS OF MULTI-LAYERED PIEZOELECTRIC PLATES显示文摘这篇论文处理 multi-layered 的厚度扭曲颤动 6 公里对称或极化的陶艺的晶体的矩形的压电的板。一个准确答案从线性压电的三维的方程被获得。答案对合成压电的设备的理解和设计有用。一个压电的共鸣器,一个压电的变压器,和一个压电的发电机作为例子被分析。 | Hu Hongping Chen Ziguang Yang Jiashi Hu Yuantai | 2007 | Acta Mechanica Solida Sinica2007，20，3： | 3 |
| 11 | Electrical Response of a Multiferroic Composite Semiconductor Fiber Under a Local Magnetic Field显示文摘We study the electrical response of a multiferroic composite semiconductor fiber consisting of a piezoelectric semiconductor layer and two piezomagnetic layers under a transverse magnetic field applied locally to a finite part of the fiber.The phenomenological theory of piezomagnetic-piezoelectric semiconductors is employed.A one-dimensional model is derived for magnetically induced extension of the fiber.For open-circuit boundary conditions at the two ends of the fiber,an analytical solution is obtained from the model linearized for small carrier perturbations.The solution shows a local electric polarization and a pair of local electric potential barrier-well.When the two ends of the fiber are under a voltage,a nonlinear numerical solution shows that the potential barrier and well forbid the passage of currents when the voltage is low.The results have potential applications in piezotronic devices when magnetic fields are involved for manipulating the devices or sensing and transduction. | Chao Liang Chunli Zhang Weiqiu Chen Jiashi Yang | 2020 | Acta Mechanica Solida Sinica2020，33，5： | 3 |
| 12 | Karyotype Analysis of Gazania rigens Varieties显示文摘For studying species origin, systematic evolution and phylogenetic relationship of Gazania rigens, four different G. rigens varieties, with different flower colors, were subjected to chromosome karyotype analysis. The somatic chromosome number in three varieties ‘Hongwen', ‘Xingbai'and ‘Richu' was 2n = 10, while in ‘Zhongguo Xunzhangju' it was 2n = 20. We speculate that the cardinal number of chromosomes in G. rigens plants is x = 5, in which case ‘Zhongguo Xunzhangju' is a tetraploid. The karyotype formulae of ‘Hongwen', ‘Xingbai' and ‘Richu' were 2n = 8m + 2sm,2n = 8m + 2sm and 2n = 10 m respectively. The karyotype formula of ‘Zhongguo Xunzhangju' was 2n = 18 m + 2sm. The asymmetrical karyotype coefficients of the four G. rigens varieties ranged from 53.80% to 58.84%. Only ‘Richu' had a ‘1A' karyotype, while the others were relatively symmetric ‘2A'. Karyotype analysis indicates that the three introduced varieties have a close genetic relationship. | ZENG Jiashi WANG Dongxu WU Yangqing GUO Xiaoyu ZHANG Yazhou LU Xiaoping | 2016 | Horticultural Plant Journal2016，2，5： | 3 |
| 13 | Thermal decomposition mechanism of low-content-fluorite Bayan Obo rare earth concentrate roasted with sodium carbonate and its consequent separation study显示文摘Thermal decomposition and phase transformation for the mixture of Bayan Obo rare earth concentrate(BORC)and sodium carbonate(Na2CO3)roasted at different temperatures with weight ratio of 100:20 were studied in detail in our study.The aim of our study is to reveal the nature of roasting reaction between BORC and Na2CO3 and thus providing a new method for processing BORC.The results indicate that BORC can be decomposed completely with Na2CO3 at around 600℃after 3 h.During the calcination process,Ce0.5Nd0.5O1.75,NaF,Na3PO4,and a rare earth double phosphate phase Na3RE(PO4)2 are formed after the decomposition of BORC with Na2CO3.In addition,the thermal decomposition mechanism is determined in the paper.Based on these facts,a clean technique processing BORC was developed.And a CeF3 powder,whose composition was measured and stability was also evaluated,was obtained for some potential application from the new technique.This research is of significance in terms of the Na2CO3-roasting BORC solid reaction study and sheds a light on a potential clean technique for BORC. | Dan Zou Ji Chen Jiashi Hu Kai Li Deqian Li | 2020 | Journal of Rare Earths2020，38，9： | 3 |
| 14 | 压电反平面裂纹问题中的电场梯度效应显示文摘用含有电场梯度效应的电弹性体理论分析了压电体中的反平面裂纹问题.利用Fourier积分变换方法,将相应的复合边值问题转化为对偶积分方程组.求解这些方程组,获得了裂纹尖端的强度因子和能量释放率.通过与没有考虑电场梯度效应的经典理论中的结果相比较,发现电场梯度效应对裂纹尖端的强度因子和能量释放率有非常重要的影响. | 曾云 胡元太 YANG Jiashi | 2005 | 华中科技大学学报(城市科学版)2005，22，B05： | 2 |
| 15 | THICKNESS-SHEAR AND THICKNESS-TWIST VIBRATIONS OF CIRCULAR AT-CUT QUARTZ RESONATORS显示文摘Exact solutions for free vibration frequencies and modes are obtained for thickness-shear and thickness-twist vibrations of unelectroded circular AT-cut quartz plates governed by the two-dimensional scalar differential equation derived by Tiersten and Smythe. Comparisons are made with experimental results and the widely-used perturbation solution by Tiersten and Smythe under the assumption of weak in-plane anisotropy. Our solution is found to be much closer to the experimental results than the perturbation solution. For the frequency of the fundamental thickness-shear mode, the error of the perturbation method is 0.4549%, significant in resonator applications. | Huijing He Jiashi Yang Qing Jiang | 2013 | Acta Mechanica Solida Sinica2013，26，3： | 2 |
| 16 | EFFECTS OF NONLINEARITY ON TRANSIENT PROCESSES IN AT-CUT QUARTZ THICKNESS-SHEAR RESONATORS显示文摘We study the effects of mechanical nonlinearity arising from large thickness-shear deformation on the transient process of an AT-cut quartz plate resonator. Mindlin's two-dimensional plate equation is used, from which a system of first-order nonlinear differential equations governing the evolution of the vibration amplitude is obtained. Numerical solutions by the Runge-Kutta method show that in common operating conditions of quartz resonators the nonlinear effect varies from noticeable to significant. As resonators are to be made smaller and thinner in the future with about the same power requirement, nonlinear effects will become more important and need more understanding and consideration in resonator design. | Nian Li Zhenghua Qian Jiashi Yang | 2015 | Acta Mechanica Solida Sinica2015，28，4： | 2 |
| 17 | Bending of a Flexoelectric Semiconductor Plate显示文摘We study electromechanical responses of a flexoelectric semiconductor plate in bending under mechanical loads.A two-dimensional theory for classical bending without shear deformation is derived from the three-dimensional macroscopic theory of flexoelectric semiconductors.A simple solution is obtained for pure bending.A combination of physical and geometric parameters is introduced as a measure of the strength of the coupling between the mechanical load and the redistribution of charge carriers.A trigonometric series solution is obtained for a simply supported rectangular plate under a local normal mechanical load,which shows concentration of mobile charges and the formation of electric potential barriers near the loading area.The results are fundamental to the mechanical manipulation of charge carriers in these plates.We also analyze the buckling of a simply supported rectangular plate under in-plane compressive forces.A series of buckling loads and modes are obtained.Numerical results show that flexoelectric coupling exhibits a stiffening effect and increases the buckling load,while semiconduction weakens the flexoelectric stiffening.The distributions of mobile charges in the first few buckling modes are presented. | Yilin Qu Feng Jin Jiashi Yang | 2022 | Acta Mechanica Solida Sinica2022，35，3： | 2 |
| 18 | Effects of mass layer imperfect bonding on the electrical impedance of a quartz crystal microbalance显示文摘We study electrically forced vibrations of a crystal plate of AT-cut quartz carrying a thin mass layer operating as a quartz crystal microbalance for mass sensing.The mass layer is imperfectly bonded to the crystal plate with their interface described by the so-called interface-slip model which allows a discontinuity of the tangential interface displacement.Mindlin’s equations for piezoelectric plates are used.An analytical solution is obtained.The electrical impedance is calculated.The effects of an elastic interface and a viscoelastic interface are examined. | CHEN YangYang WANG Ji DU JianKe YANG JiaShi | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，11： | 2 |
| 19 | ELECTRICALLY FORCED VIBRATION OF A THICKNESS-TWIST MODE PIEZOELECTRIC RESONATOR WITH NON-UNIFORM ELECTRODES显示文摘我们与在 6 公里对称的晶体的一个压电的板共鸣器的厚度扭曲颤动上改变厚度学习电极的效果。准确理论分析被执行。结果证明不一致的电极在模式形状上有强壮的效果,并且建议为套住的强壮的精力使用不一致的电极的可能性。 | Yang Jiashi Chen Ziguang Hu Hongping | 2007 | Acta Mechanica Solida Sinica2007，20，3： | 2 |
| 20 | Geochemical features of the meteorite impact around Eocene/Oligocene boundary layer in central eastern Pacific region显示文摘 | YIN Yanhong WANG Tianfeng SUN Jiashi | 2004 | Journal of Ocean University of China2004，34，2： | 1 |
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