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| 1 | FINITE ELEMENT MODELLING OF COMPLEX 3D STATIC AND DYNAMIC CRACK PROPAGATION BY EMBEDDING COHESIVE ELEMENTS IN ABAQUS显示文摘This study proposes an algorithm of embedding cohesive elements in Abaqus and develops the computer code to model 3D complex crack propagation in quasi-brittle materials in a relatively easy and efficient manner.The cohesive elements with softening traction-separation relations and damage initiation and evolution laws are embedded between solid elements in regions of interest in the initial mesh to model potential cracks.The initial mesh can consist of tetrahedrons,wedges,bricks or a mixture of these elements.Neither remeshing nor objective crack propagation criteria are needed.Four examples of concrete specimens,including a wedge-splitting test,a notched beam under torsion,a pull-out test of an anchored cylinder and a notched beam under impact,were modelled and analysed.The simulated crack propagation processes and load-displacement curves agreed well with test results or other numerical simulations for all the examples using initial meshes with reasonable densities.Making use of Abaqus's rich pre/post-processing functionalities and powerful standard/explicit solvers,the developed method offers a practical tool for engineering analysts to model complex 3D fracture problems. | Xiangting Su Zhenjun Yang Guohua Liu | 2010 | Acta Mechanica Solida Sinica2010，23，3： | 23 |
| 2 | Tumor suppressor miR-128-3p inhibits metastasis and epithelial-mesenchymal transition by targeting ZEB1 in esophageal squamous-cell cancer显示文摘MicroRNAs (miRNAs ) 是在 post-transcriptional 层次调整多重生物功能的一些短 RNA,例如 tumorigenic 过程,煽动性的损害和房间 apoptosis。(ZEB1 ) 锌手指电子盒子有约束力的 homeobox 因素 1 是上皮间充质的转变(EMT ) 的一个关键调停人。它包括人的食道的有鳞房间的癌(ESCC ) 导致各种各样的癌症的恶意的前进。在这研究,我们发现 miR-128-3p 由使用 PCR 是在 ESCC 纸巾和房间的 downregulated。而且, miR-128-3p 的下面调整的表示被证明与 ESCC 病人的差的预后被联系并且可能被认为是一个独立预示的因素。然后,我们在 ESCC 房间检验了 miR-128-3p 的角色,并且发现 miR-128-3p 能在 vitro 压制房间迁居和侵略。而且, ZEB1 被证实是由酶记者试金的 miR-128-3p 的一个直接目标。营救实验证明 EMT 被 miR-128-3p 经由 ZEB1 的抑制调整。一起拿所有,我们断定 miR-128-3p 压制 EMT,经由 ZEB1 的转移,和 miR-128-3p 可以是在 ESCC 的一个批评调停人。 | Lili Zhao Rui Li Shanling Xu Yi Li Pei Zhao Wei Dong Zhenjun Liu Qian Zhao Bo Tan | 2018 | Acta Biochimica et Biophysica Sinica2018，50，2： | 21 |
| 3 | A miniature liquid helium temperature JT cryocooler for space application显示文摘Along with the development of space science and technology,miniature liquid helium temperature long life cryocooler is a focus subject in cryogenic study.Since it is the precondition of space detection researches,institutions of space in many countries do the research on it.In this article,we designed a compound cooling system.A three-stage high frequency thermal coupled pulse tube cryocooler was used to precool a Joule-Thomson(JT)cryocooler.This system has no moving parts at low temperatures and is hence suitable for space operation.Liquid helium temperature was successfully achieved in both open loop and closed cycle experiments.In the closed cycle experiment,when 473 W electric power was inputted,the cooling system reached a no-load temperature of 4.4 K,and a cooling capacity of 11.6 mW was provided at 4.54 K.It is the first miniature liquid helium temperature JT cryocooler in China and the research achievement paves a way for the space application of ultra-long wave infrared detection and THz technologies. | QUAN Jia ZHOU ZhenJun LIU YanJie LI JianGuo MA YueXue LIANG JingTao | 2014 | Science China(Technological Sciences)2014，57，11： | 16 |
| 4 | The ultraviolet photoconductive detector based on Al-doped ZnO thin film with fast response显示文摘We report fabrication and characterization of metal-semiconductor-metal photoconductive detectors based on Al-doped ZnO thin films fabricated by radio frequency magnetron sputtering.Optical and structural properties of the thin films were characterized using various techniques.At 6 V bias,a responsivity higher than 4 A/W in the wavelength shorter than 350 nm was obtained,and this responsibility dropped quickly and reached the noise floor in the visible region.Transient response measurement revealed that the detector had a fast photoresponse with a rise time of 9 ns and a fall time of 1.2 μs. | SUN Jian DAI Qian LIU FengJuan HUANG HaiQin LI ZhenJun ZHANG XiQing WANG YongSheng | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，1： | 4 |
| 5 | Geochronology and Geochemical Characteristics of Intrusion in the Jinchangliang Gold Deposit,Inner Mongolia and Their Tectonic Significance显示文摘Discovered and mined in recent years, the Jinchangliang gold deposit has not yet been studied in its genetic type. In this paper, the geological features of ore deposit, S isotopic composition, metallogenic age and elements geochemical of the granite closely related to mineralization were discussed. The results of the geological features of ore deposit and S isotopic composition show that ore-bearing hydrothermal solution was closely related with the intrusion of magmatic. The granite is characteristic of high silica SiO_2=72.38%–72.98%, high aluminum and Al_2O_3=14.22%–14.35%, low calcium CaO=0.16% –0.26%, and low value of FeOT/MgO(6.86–7.73), and rich in alkalis Na_2O+K_2O=9.11%–9.24%, suggesting that it is high-K calc-alkaline, highly fractionated, weak aluminum A-type granite. The REE patterns are inclined to right and show intense fractionation between LREE and HREE, without obvious negative Eu anomaly(δEu=0.80–0.84). The primitive mantle-normalized spidergrams are characterized by depletion of Ba, U, Ta, Nb, Zr, Ti and P, which implies that the granite has the characteristics of the crust-mantle mixing. S isotopes also indicate that the material source of gold deposit is closely related to the granite rocks. The LA-ICP-MS Zircon UPb age of the Damiao rock mass medium-fine grained monzogranite(belonging to the early IndoChina) is(245±1) Ma. It shows that Jinchangliang gold deposit was not formed in Yanshanian, but the early Indo-China. Specifically speaking, the deposit was formed in the collision stage of the North China plate and the Siberian plate. | SUN Zhenjun SUN Guosheng YU Henan TIAN Yi LIU Shanli XIANG Zhu MENG Jian XUE Huaiyu LU Lina | 2015 | Acta Geologica Sinica(English Edition)2015，89，6： | 4 |
| 6 | An adaptive scaled boundary finite element method by subdividing subdomains for elastodynamic problems显示文摘The scaled boundary finite element method(SBFEM) is a semi-analytical numerical method,which models an analysis domain by a small number of large-sized subdomains and discretises subdomain boundaries only.In a subdomain,all fields of state variables including displacement,stress,velocity and acceleration are semi-analytical,and the kinetic energy,strain energy and energy error are all integrated semi-analytically.These advantages are taken in this study to develop a posteriori h-hierarchical adaptive SBFEM for transient elastodynamic problems using a mesh refinement procedure which subdivides subdomains.Because only a small number of subdomains are subdivided,mesh refinement is very simple and efficient,and mesh mapping to transfer state variables from an old mesh to a new one is also very simple but accurate.Two 2D examples with stress wave propagation were modelled.The results show that the developed method is capable of capturing propagation of steep stress regions and calculating accurate dynamic responses,using only a fraction of degrees of freedom required by adaptive finite element method. | ZHANG ZiHua 1,2,YANG ZhenJun 2,LIU GuoHua 1 & HU YunJin 1 1 College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China 2 School of Engineering,University of Liverpool,L69 3GQ,UK | 2011 | Science China(Technological Sciences)2011，54，S1： | 4 |
| 7 | Super-absorbent swellable polymer as grouting material for treatment of karst water inrush显示文摘Grouting is the most commonly used method to control water inrush in underground engineering.Traditional cement-based materials are easy to dilute and hard to coagulate under the influence of large flow and high-velocity water inrush.To address these deficiencies,a new type of polymer grouting material with an excellent expansion ratio was synthesised.The material quickly absorbs water and has an expansion ratio of 1:300.The material is composed of a superabsorbent polymer(SAP),glycerol,and ethanol.The effects of water quality on the expansion ratio and expansion rate of the material were examined,and the best solid–liquid ratio for the slurry was determined by fluidity measurements.A karst specially designed pipeline water inrush test device showed that 800 g of SAP can achieve 0.6 m/s water flow blockage in the smooth pipeline,demonstrating that the ability of the SAP slurry to block water inrush is superior to those of other materials.This study provides a reference for water inrush plugging,and has important implications for the reduction and control of karst pipeline-type water inrush disasters,ensuring the safety of construction sites and preventing loss of life and damage to property. | Shucai Li Chenyang Ma Rentai Liu Mengjun Chen Jia Yan Zhenjun Wang Shaolong Duan Huasheng Zhang | 2021 | International Journal of Mining Science and Technology2021，31，5： | 2 |
| 8 | A subunit vaccine based on rH-NS induces protection against Mycobacterium tuberculosis infection by inducing the Thl immune response and activating macrophaqes显示文摘 | Yuan Liu Suting Chen Bowen Pan Zhu Guan Zhenjun Yang Linfei Duan Hong Cai | 2016 | Acta Biochimica et Biophysica Sinica2016，48，10： | 2 |
| 9 | Micromachining process simulation using a continuous cellular automata method显示文摘 | Zhenjun Zhu Chang Liu | 2000 | Journal of Microelectromechanical Systems2000，9，2： | 1 |
| 10 | Micromachining process simulation using a continuous cellular automata method 显示文摘 | Zhenjun Zhu Chang Liu | 2000 | Journal of Microelectromechanical Systems2000，9，2： | 1 |
| 11 | Anisotropic crystalline etching simulation using a continuous cellular automata algorithm显示文摘 | Zhu zhenjun Liu chang | 2000 | Journal of Computer Modeling Engineering Science2000，，1： | 1 |
| 12 | A Control Strategy on Starting up a Vehicle with AMT显示文摘 | Amir I A Qin Datong Liu Zhenjun | 2005 | In- formation Technology Journal2005，4，2： | 1 |
| 13 | Effect of Build Direction on Fatigue Performance of L-PBF 316L Stainless Steel显示文摘The microstructure and fatigue and tensile properties of 316 L stainless steel fabricated via laser powder bed fusion(L-PBF)were investigated.Two 316 L stainless steel specimens with different loading directions which are either perpendicular to or parallel to building direction were prepared by L-PBF process.The results of X-ray diffraction tomography showed that there was no significant difference in morphology and size/distribution of the defects in the HB and VB samples.Since long axis of columnar grains is generally parallel to the build direction,the fatigue crack encounters more grain boundaries in VB samples under cyclic loading,which led to enhanced fatigue resistance of VB samples compared with HB sample.In contrast to HB sample,the VB sample has a higher fatigue strength due to a higher resistance to localized plastic deformation under cyclic loading.The differences in fatigue properties of L-PBF 316 L SS with different build directions were predominantly controlled by solidification microstructures. | Chenfan Yu Yuan Zhong Peng Zhang Zhenjun Zhang Congcong Zhao Zhefeng Zhang Zhijian Shen Wei Liu | 2020 | Acta Metallurgica Sinica(English Letters)2020，33，4： | 1 |
| 14 | Growth of 12-inch uniform monolayer graphene film on molten glass and its application in PbI2-based photodetector显示文摘Direct growth of large area uniform graphene on functional insulating materials is essential for engineering versatile applications of graphene. However, the existing synthesis approaches can hardly avoid the generation of non-uniform multilayer graphene along the gas flow direction, affording huge challenges for further scaling up. Herein, by exploiting the molten state of soda-lime glass, we have accomplished the direct growth of large area uniform (up to 30 cm × 6 cm) graphene via a facile chemical vapor deposition route on low cost soda-lime glass. The use of molten glass eliminates the chemically active sites (surface corrugations, scratches, defects), and improves the mobility of carbon precursors, affording uniform nucleation and growth of monolayer graphene. Intriguingly, thus-obtained graphene acts as an ideal coating layer for the surface crystallographic modification of soda-lime glass, making it epitaxy substrates for synthesizing high-quality PbI2 nanoplates and continues films. Accordingly, a prototype photodetector was fabricated to present excellent photoelectrical properties of high responsivity (~ 600 on/off current ratio) and fast response speed (18 μs). This work hereby paves ways for the batch production and the direct applications of graphene glass as platforms for constructing high performance electronic and optoelectronic devices. | Zhaolong Chen Haina Ci Zhenjun Tan Zhipeng Dou Xu-dong Chen Bingzhi Liu Ruojuan Liu Li Lin Lingzhi Cui Peng Gao Hailin Peng Yanfeng Zhang Zhongfan Liu | 2019 | Nano Research2019，12，8： | 1 |
| 15 | Chaos optimi- zation algorithms based on chaotic maps with different probability distribution and search speed for global optimi- zation显示文摘 | YANG Dixiong LIU Zhenjun ZHOU Jilei | 2014 | Communications in Nonlinear Science and Nu- merical Simulation2014，19，4： | 1 |
| 16 | DRNet:Towards fast,accurate and practical dish recognition显示文摘Existing algorithms of dish recognition mainly focus on accuracy with predefined classes,thus limiting their application scope.In this paper,we propose a practical two-stage dish recognition framework(DRNet)that yields a tradeoff between speed and accuracy while adapting to the variation in class numbers.In the first stage,we build an arbitrary-oriented dish detector(AODD)to localize dish position,which can effectively alleviate the impact of background noise and pose variations.In the second stage,we propose a dish reidentifier(DReID)to recognize the registered dishes to handle uncertain categories.To further improve the accuracy of DRNet,we design an attribute recognition(AR)module to predict the attributes of dishes.The attributes are used as auxiliary information to enhance the discriminative ability of DRNet.Moreover,pruning and quantization are processed on our model to be deployed in embedded environments.Finally,to facilitate the study of dish recognition,a well-annotated dataset is established.Our AODD,DReID,AR,and DRNet run at about 14,25,16,and 5 fps on the hardware RKNN 3399 pro,respectively. | CHENG SiYuan CHU BinFei ZHONG BiNeng ZHANG ZiKai LIU Xin TANG ZhenJun LI XianXian | 2021 | Science China(Technological Sciences)2021，64，12： | 1 |
| 17 | , Highly efficient phosphorescent organic light-emitting devices based on Re(CO)3Cl-bathophenanthroline 显示文摘 | Li Jiang Si Zhenjun Liu Chunbo | 2007 | Semicond Sci Technol2007，22，： | 1 |
| 18 | A control strategy on starting up of vehicle with automatic manual transmis- sions 显示文摘 | AMIR I A QIN Datong LIU Zhenjun | 2005 | Information Technology Journal2005，4，2： | 1 |
| 19 | Immunomodulation of Rheum tanguticum polysaccharide (RTP) on the immunosuppressive effects of dexamethasone (DEX) on the treatment of colitis in rats induced by 2,4,6-trinitrobenzene sulfonic acid显示文摘 | Li Liu Shifang Yuan Yin Long Zhenjun Guo Yang Sun Yuhua Li Yinbo Niu Chen Li Qibing Mei | 2009 | International Immunopharmacology2009，，13： | 1 |
| 20 | Fusion of Infrared and Visible Images Based on Infrared Object Extraction显示文摘The ideal fused results of infrared and visible images,should contain the important infrared objects,and preserve the visible textural detail information as much as possible.The fused images are more consistent with human visual perception effect.For this purpose,a novel infrared and visible image fusion framework is proposed.Under the guidance of the model,the source images are decomposed into large-scale edge,small-scale textural detail and coarse-scale base level information.Among which,the large-scale edge information contains the main infrared features,on this basis,the infrared image is further segmented into the object,transition and background regions by OTSU multi-threshold segmentation algorithm.In the end,the fused weights for the decomposed sub-information are determined by the segmented results,so that,the infrared object information can be effectively injected into the fused image,and the important visible textural detail information can be preserved as much as possible in the fused image.Experimental results show that,the proposed method can not only highlight the infrared objects,but also preserve the visual information in the visible image as much as possible.The fused results are superior to the commonly used representative fusion methods,both in subjective perception and objective evaluation. | RONG Chuanzhen LIU Gaohang PING Zhuolin JIA Yongxing YUE Zhenjun XU Guanghui | 2021 | Chinese Journal of Electronics2021，30，2： | 1 |
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