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| 1 | PROPAGATION OF LOVE WAVES IN PRESTRESSED PIEZOELECTRIC LAYERED STRUCTURES LOADED WITH VISCOUS LIQUID显示文摘我们调查在压电的分层的结构的起始的应力的效果装载了与的经分解粘滞爱的散、稀释的特征上的液体飘动,它包含薄压电的层完美地结合了到无界的有弹性的底层。在压电的层的起始的应力的效果并且粘滞爱波浪的阶段速度上的液体的系数被分析。数字结果被介绍并且讨论。分析方法和结果能为化学药品和 biosensing 液体传感器的设计是有用的。 | Jianke Du Kai Xian Ji Wang Yook-Kong Yong | 2008 | Acta Mechanica Solida Sinica2008，21，6： | 7 |
| 2 | An analysis of surface acoustic wave propagation in a plate of functionally graded materials with a layered model显示文摘In a homogeneous plate, Rayleigh waves will have a symmetric and anti-symmetric mode regarding to the mid-plane with different phase velocities. If plate properties vary along the thickness, or the plate is of functionally graded material (FGM), the symmetry of modes and frequency behavior will be modified, thus producing dif-ferent features for engineering applications such as amplifying or reducing the velocity and deformation. This kind of effect can also be easily realized by utilizing a layered structure with desired material properties that can produce these effects in terms of velocity and displacements, since Rayleigh waves in a solid with gen-eral material property grading schemes are difficult to analyze with known methods. Solutions from layered structures with exponential and polynomial property grad-ing schemes are obtained from the layered model and comparisons with known analytical results are made to validate the method and examine possible applica-tions of such structures in engineering. | GAO LiMing WANG Ji ZHONG Zheng DU JianKe | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，2： | 5 |
| 3 | PARALLEL FINITE ELEMENT ANALYSIS OF HIGH FREQUENCY VIBRATIONS OF QUARTZ CRYSTAL RESONATORS ON LINUX CLUSTER显示文摘石英水晶共鸣器是典型压电的声学的波浪设备因为有在无线电频率(RF ) 的机械颤动频率的频率控制应用变化。颤动和变丑的精确分析通常在共鸣器设计和改进过程被要求。考虑包括电极,增长,象温度那样的偏爱地,起始的压力,和加速的存在。自然地,有限元素方法是为有多物理自然的如此的 a coupled 问题的唯一的有效工具。主要挑战是结果的线性方程的极其大的尺寸。为这个原因,我们一直在采用 Mindlin 板方程减少计算困难。另外,我们不得不在 Linux 簇上利用并行计算技术,它现在为学术、工业的应用程序是广泛地可得到的,到改进计算效率。我们的研究的一般原则是使用开放源代码软件部件和公共领域技术在 Linux 簇上为开发者和用户减少费用。我们明确地以一个网孔发电机开始因为矩形、圆形的类型的石英水晶共鸣器,和 Mindlin 板方程为有限元素分析被实现。象并行处理,处理的稀少的矩阵,和最近的特征值抽取包裹一样的计算技术集成于程序。它从我们簇上的这些算法和方法的联合能显著地满足记忆要求和还原剂计算时间的计算是清楚的。 | Ji Wang Yu Wang Wenke Hu Wenhua Zhao Jianke Du Dejin Huang | 2008 | Acta Mechanica Solida Sinica2008，21，6： | 4 |
| 4 | A two-dimensional analysis of surface acoustic waves in finite elastic plates with eigensolutions显示文摘It is generally known that surface acoustic waves, or Rayleigh waves, have different mode shapes in infinite plates. To be precise, there are both exponentially decaying and growing components in plates appearing in pairs, representing symmetric and antisymmentric modes in a plate. As the plate thickness increases, the combined modes will approach the Rayleigh mode in a semi-infinite solid, exhibiting surface acoustic wave deformation and velocity. In this study, the two-dimensional theory for surface acoustic waves in finite plates is extended to include the exponentially growing modes in the expansion function. With these extra equations, we study the surface acoustic waves in a plate with different thickness to examine the coupling of the exponentially decaying and growing modes. It is found that for small thick- ness, the two groups of waves are strongly coupled, showing the significance of including the effect of thickness in analysis. As the thickness increases to certain values, such as more than five wavelengths, the exponentially decaying modes alone will be able to predict vibrations of surface acoustic wave modes accurately, thus simplifying the equations and solutions significantly. | WANG Ji DU JianKe PAN QiaoQiao | 2007 | Science China(Physics,Mechanics & Astronomy)2007，50，5： | 4 |
| 5 | Love wave propagation in layered magneto- electro-elastic structures显示文摘An analytical approach was taken to investigate Love wave propagation in a layered magneto-electro-elastic structure, where a piezomagnetic (or piezoelectric) mate-rial thin layer was bonded to a semi-infinite piezoelectric (or piezomagnetic) sub-strate. Both piezoelectric and piezomagnetic ceramics were polarized in the anti-plane (z-axis) direction. The analytical solution of dispersion relations was obtained for magneto-electrically open and short boundary conditions. The phase velocity, group velocity, magneto-electromechanical coupling factor, electric po-tential, and magnetic potential were calculated and discussed in detail. The nu-merical results show that the piezomagnetic effects have remarkable effect on the propagation of Love waves in the layered piezomagnetic/piezoelectric structures. | DU JianKe JIN XiaoYing WANG Ji | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，6： | 3 |
| 6 | Thickness-Shear Frequencies of an Infinite Quartz Plate with Graded Material Properties Across the Thickness显示文摘For quartz crystal resonators of thickness-shear type,the vibration frequency and mode shapes reflect the basic material and structural properties of a quartz crystal plate and the variation with time under attack by erosive gases and liquids that can cause surface and internal degradation in a graded form.Such gradual effects,in turn,will change surface conditions through elastic constants and stiffness and more importantly the gradient of such properties across the thickness with certain depth.Now we study the thickness-shear vibrations of functionally graded material plates with properties of the popular AT-cut quartz crystal varying across the thickness in a general pattern represented by both sine and cosine components of the thickness.The vibration solutions are obtained through the Fourier expansion of the plate deformation. | Rongxing Wu Wenliang Zhang Tingfeng Ma Jianke Du Ji Wang | 2020 | Acta Mechanica Solida Sinica2020，33，3： | 2 |
| 7 | A chromosome-level genome assembly of rugged rose (Rosa rugosa) provides insights into its evolution, ecology, and floral characteristics显示文摘Rosa rugosa,commonly known as rugged rose,is a perennial ornamental shrub.It produces beautiful flowers with a mild fragrance and colorful seed pods.Unlike many other cultivated roses,R.rugosa adapts to a wide range of habitat types and harsh environmental conditions such as salinity,alkaline,shade,drought,high humidity,and frigid temperatures.Here,we produced and analyzed a high-quality genome sequence for R.rugosa to understand its ecology,floral characteristics and evolution.PacBio HiFi reads were initially used to construct the draft genome of R.rugosa,and then Hi-C sequencing was applied to assemble the contigs into 7 chromosomes.We obtained a 382.6Mb genome encoding 39,704 protein-coding genes.The genome of R.rugosa appears to be conserved with no additional whole-genome duplication after the gamma whole-genome triplication(WGT),which occurred~100 million years ago in the ancestor of core eudicots.Based on a comparative analysis of the high-quality genome assembly of R.rugosa and other high-quality Rosaceae genomes,we found a unique large inverted segment in the Chinese rose R.chinensis and a retroposition in strawberry caused by post-WGT events.We also found that floral development-and stress response signaling-related gene modules were retained after the WGT.Two MADS-box genes involved in floral development and the stress-related transcription factors DREB2A-INTERACTING PROTEIN 2(DRIP2)and PEPTIDE TRANSPORTER 3(PTR3)were found to be positively selected in evolution,which may have contributed to the unique ability of this plant to adapt to harsh environments.In summary,the high-quality genome sequence of R.rugosa provides a map for genetic studies and molecular breeding of this plant and enables comparative genomic studies of Rosa in the near future. | Fei Chen Liyao Su Shuaiya Hu Jia-Yu Xue Hui Liu Guanhua Liu Yifan Jiang Jianke Du Yushan Qiao Yannan Fan Huan Liu Qi Yang Wenjie Lu Zhu-Qing Shao Jian Zhang Liangsheng Zhang Feng Chen Zong-Ming(Max)Cheng | 2021 | Horticulture Research2021，8，1： | 2 |
| 8 | 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 |
| 9 | An Analysis of Piezomagnetic-Piezoelectric Semiconductor Unimorphs in Coupled Bending and Extension under a Transverse Magnetic Field显示文摘We study the response of a composite beam(unimorph)with a piezomagnetic layer and a piezoelectric semiconductor layer under a transverse magnetic field.A one-dimensional model for coupled bending and extension of the beam is derived from the three-dimensional theory.A simple and analytical solution of the model is obtained,showing that various electromechanical fields develop in the beam through piezomagnetic and piezoelectric couplings as well as semiconduction.In particular,the mobile charges in the semiconductor layer redistribute themselves under the magnetic field.A coupling coefficient is defined to describe the strength of this magneto-semiconduction coupling.The effects of physical and geometric parameters on the fields and the coupling coefficient are examined.The results are fundamental to piezotronics when magnetic effects are involved. | Lei Yang Jianke Du Ji Wang Jiashi Yang | 2021 | Acta Mechanica Solida Sinica2021，34，5： | 1 |
| 10 | Extended Kantorovich method for local stresses in composite laminates upon polynomial stress functions显示文摘The extended Kantorovich method is employed to study the local stress concentrations at the vicinity of free edges in symmetrically layered composite laminates subjected to uniaxial tensile load upon polynomial stress functions. The stress fields are initially assumed by means of the Lekhnitskii stress functions under the plane strain state. Applying the principle of complementary virtual work,the coupled ordinary differential equations are obtained in which the solutions can be obtained by solving a generalized eigenvalue problem. Then an iterative procedure is established to achieve convergent stress distributions. It should be noted that the stress function based extended Kantorovich method can satisfy both the traction-free and free edge stress boundary conditions during the iterative processes. The stress components near the free edges and in the interior regions are calculated and compared with those obtained results by finite element method(FEM). The convergent stresses have good agreements with those results obtained by three dimensional(3D) FEM. For generality, various layup configurations are considered for the numerical analysis. The results show that the proposed polynomial stress function based extended Kantorovich method is accurate and efficient in predicting the local stresses in composite laminates and computationally much more efficient than the 3D FEM. | Bin Huang Ji Wang Jianke Du Yan Guo Tingfeng Ma Lijun Yi | 2016 | Acta Mechanica Sinica2016，32，5： | 1 |
| 11 | Molecular characteristics of S-RNase alleles as the determ inant of self-i ncompatibility in the style of Fragaria viridi显示文摘Strawberry(Fragaria spp.)is a member of the Rosoideae subfamily in the family Rosaceae.The self-incompatibility(SI)of some diploid species is a key agronomic trait that acts as a basic pollination barrier;however,the genetic mechanism underlying SI control in strawberry remains unclear.Two candidate S-RNases(S a-and S^-RNase)identi fi ed in the transcriptome of the styles of the self-incompatible Fragaria viridis 42 were con fi rmed to be SI determinants at the S locus following genotype identi fi cation and intraspeci fi c hybridization using sel fi ng progenies.Whole-genome collinearity and RNase T2 family analysis revealed that only an S locus exists in Fragaria;however,none of the compatible species contained S-RNase.Although the results of interspeci fi c hybridization experiments showed that F.viridis(SI)styles could accept pollen from F.mandshurica(self-compatible),the reciprocal cross was incompatible.S a and S b-RNase contain large introns,and their noncoding sequences(promotors and introns)can be transcribed into long noncoding RNAs(lncRNAs).Overall,the genus Fragaria exhibits S-RNase-based gametophytic SI,and S-RNase loss occurs at the S locus of compatible germplasms.In addition,a type of SI-independent unilateral incompatibility exists between compatible and incompatible Fragaria species.Furthermore,the large introns and neighboring lncRNAs in S-RNase in Fragaria could offer clues about S-RNase expression strategies. | Jianke Du Chunfeng Ge Tingting Li Sanhong Wang Zhihong Gao Hidenori Sassa Yushan Qiao | 2021 | Horticulture Research2021，8，1： | 1 |
| 12 | Love wave propagation in functionally graded piezoelectric material layer显示文摘 | Du Jianke Jin Xiaoying Wang Ji Xian Kai | 2007 | Ultrasonics2007，46，1： | 1 |
| 13 | An analysis of nonlinear vibrations of coupled thickness-shear and flexural modes of quartz crystal plates with the homotopy analysis method 显示文摘 | Wu Rongxing Wang Ji Du Jianke | 2012 | IEEE Transactions on Ultrasonics Ferroeleetrics and Frequency Control2012，59，1： | 1 |
| 14 | An analysis of nonlinear vibrations of coupled thickness-shear and flexural modes of quartz crystal plates with the homo-topy analysis method显示文摘 | WU Rongxing WANG Ji DU Jianke | 2012 | IEEE Transactions on Ultra- sonics Ferroelectrics and Frequency Control2012，59，1： | 1 |
| 15 | The cal culation of electrical parameters of AT-cut quartz crys- tal resonators with the consideration of material viscos- ity 显示文摘 | WANG Ji ZHAO Wenhua DU Jianke | 2011 | Ultrasonics2011，51，1： | 1 |
| 16 | Genome-wide identification and co-expression analysis of GDSL genes related to suberin formation during fruit russeting in pear显示文摘Glycine-aspartic acid–serine-leucine(GDSL)type lipases/esterases genes play critical roles in plant development and are related to the responses to abiotic and biotic stress.However,little is known about the GDSL family in pear(Pyrus spp.).Studies have shown GDSL-domain proteins play key roles in suberin deposition.Suberin deposition in the fruit epidermis,also called russeting,is an important defect that negatively affects consumer's appeal in some fruit species,such as pear,apple and grapevine.Fruit russeting is mainly associated with cuticle microcracking and suberin accumulation in the inner part of the epidermal cell walls.To gain insight into the role of the GDSL gene family in suberin deposition and russet development in pear,we performed a genome-wide characterization of the GDSL family,including their identification,chromosomal localization,phylogenetic relationships,and expression patterns,in different tissues/organs in pear.One hundred and thirteen GDSL-type lipases/esterases genes were identified in the pear genome,and a phylogenetic analysis revealed that GDSL family can be classified into four distinct groups.Thirty GDSL genes were co-expressed with five homolog pear genes of three well-known suberin biosynthesis Arabidopsis genes(AtGPAT5,AtASFT,and AtCYP86B1)in the transcriptional co-expression network during pear fruit development.Among the 30 co-expressed GDSL genes,twelve genes were further analyzed by quantitative Real-time PCR,and the results showed the expression levels of the 12 genes were different between the russet exocarp and green exocarp of sand pear at different fruit development stages.Our study provides a detailed overview of the GDSL gene family and lays the foundation for future functional characterization of GDSL genes in P.bretschneideri. | Pujuan Zhang Hong Zhang Jianke Du Yushan Qiao | 2022 | Horticultural Plant Journal2022，8，2： | 1 |
| 17 | Frequency–Temperature Analysis of Thickness-Shear Vibrations of SC-Cut Quartz Crystal Plates with the First-Order Mindlin Plate Equations显示文摘With the incremental thermal field theory by Lee and Yong,the Mindlin plate equations for the analysis of thickness-shear vibrations of SC-cut quartz crystal with the consideration of thermal effect have been obtained.By assuming straight-crested waves in a rectangular plate,the dispersion relations,frequency spectra,mode shapes,and frequency–temperature relations of the thickness-shear mode of SC-cut quartz crystal plates are calculated with plate configurations.The computational results from SC-cut quartz crystal plates are compared with those from AT-cut,which shows that SC-cut resonators have better frequency–temperature relation as a validation.For practical applications,such results will be useful in the precision design and improvement of SC-cut quartz crystal resonator structures. | Rongxing Wu Wenjun Wang Guijia Chen Jianke Du Tingfeng Ma Ji Wang | 2021 | Acta Mechanica Solida Sinica2021，34，4： | 0 |
| 18 | Interaction between bending and mobile charges in a piezoelectric semiconductor bimorph显示文摘We study the bending of a two-layer piezoelectric semiconductor plate(bimorph).The macroscopic theory of piezoelectric semiconductors is employed.A set of two-dimensional plate equations is derived from the three-dimensional equations.The plate equations exhibit direct couplings among bending,electric polarization along the plate thickness,and mobile charges.In the case of pure bending,a combination of physical and geometric parameters is identified which characterizes the strength of the interaction between the mechanical load and the distribution of mobile charges.In the bending of a rectangular plate under a distributed transverse mechanical load,it is shown that mobile charge distributions and potential barriers/wells develop in the plate.When the mechanical load is local and self-balanced,the induced carrier distributions and potential barriers/wells are also localized near the loading area.The results are fundamentally useful for mechanically manipulating mobile charges in piezoelectric semiconductor devices. | Lei YANG Jianke DU J.S.YANG | 2022 | Applied Mathematics and Mechanics(English Edition)2022，43，8： | 0 |
| 19 | Digital analysis of tooth microwear,a potential application for dental microwear monitor显示文摘In general,tooth wear is difficult to be noticed until it leads to toothache in vivo.Developing a dynamic dental wear monitoring system to predict tooth wear in daily life is a necessity.The translation between complex surface wear morphology and corresponding digital signal source is a technical limitation to develop this kind of monitoring system.Microwear texture analysis has been widely employed in predicting diet by a palaeontologist.The main question is whether the microwear texture analysis has potential development space to develop a sensor for monitoring tooth wear.According to obtained results,the microwear texture analysis had enough sensitivity to display the surface morphology variations for different chewing foods and various angles.The corresponding sensitive digital signal of tooth microwear surface morphology makes it possible to develop a dental microwear sensor. | Gang Xue Conghu Hu Jianke Du Licheng Hua | 2022 | Biosurface and Biotribology2022，8，1： | 0 |
| 20 | Flexible,high-strength titanium nanowire for scaffold biomimetic periodontal membrane显示文摘A layer of micro-sized periodontal membrane can buffer most chewing forces to protect the interface between the natural tooth root and alveolar bone.Artificial dental implants usually direct contact onto the alveolar bone without a buffer layer,which increases the risk of surface damage.The main purpose of this work was the bionic design of a flexible layer of nanowire scaffold on a titanium implant surface according to the function of the periodontal membrane.Millions of nanowires were woven into a superhydrophilic layer of porous scaffold.The evolution of mechanical properties displayed that the biomimetic nanowire scaffold could absorb a maximum of about 1.59 KJ energy per square centi-meter by low-speed impact.The minimum tensile strength of one nanowire was 2 GPa.A biomimetic flexible periodontal membrane connection functioning between the natural tooth root and alveolar bone has great potential value for developing advanced artificial dental implants for dental restorations. | Jin Li Licheng Hua Weiyuan Wang Chenjie Gu Jianke Du Conghu Hu | 2021 | Biosurface and Biotribology2021，7，1： | 0 |
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