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Journal of Coal Science & Engineering(China) 2011年第1期17卷 6-11页

作者： yang sheng-li CAO Guang-ming LI Fu-sheng Faculty of Resources ＆ Safety Engineering China University of Mining and Technology （Beijing） Beijing 100083 China China National CoalAssociation Beijing 100713 China Baotou Coal Subsidiary of China Shenhua Energy Co. Ltd Baotou 014000 China

Taking Adaohai Coal Mine as the example, underground pressure appearance laws of fully mechanized top coal slice caving on high-dipping and thick coal seams. Through site visit, theoretical analysis and discrete element calculation, the research shows that, as the mining deepens, underground stress of lower sublevels is more obvious and higher than that of upper sublevels and is higher in the air return roadway than that in the air intake roadway in the area that is near to the top coal. Because the top coal is thick and gangue is caved above the support, underground pressure to the working face is relatively gentle. Immediate roof will mainly fall down along the floor. Main roof and the rock bed above the main roof will move to the mined out area along the fault in the early stage and then fall down with the mined out area later. In addition, roof pressure mainly periodically appears in two directions along the trend and the dip.

关键词： steeply inclined and extremely thick coal seam horizontal fully mechanized top coal slice caving undergroundpressure numerical calculation

Oligo-lysine Induced Formation of Silica Particles in Neutral Silicate Solution

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Chemical Research in Chinese Universities 2006年第3期22卷 368-370页

作者： ZHANG Xiao-dong SUN Ying-ying ZHUANG Jia-qi yang Wen-sheng College of Chemistry Jilin University Changchun 130023 P.R. China

Oligo-（lysine） n （n = 1-4） containing different numbers of lysine residues was used to induce the condensation of silicic acid to form silica particles in neutral silicate solution. It was found that the condensation rate and the formation of silica particles are dependent on the number of lysine residues in an oligo-lysine. Oligo-lysine with more lysine residues can link more silicic acid together to form a matrix that promotes the effective aggregation of the condensed silica pieces to form large silica particles.

关键词： Biosilification Polylysine Silica

Quasiparticle scattering interference in electron-doped cuprate superconductors

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Frontiers of physics 2015年第6期10卷 109-116页

作者： Shu-Hua Wang Shuang-sheng yang Huai-Song Zhao Feng Yuan College of Physics Qingdao University Qingdao 266071 China

By considering the nonmonotonic d-wave gap effect, the energy and momentum dependence of quasiparticle scattering interference is studied in the presence of a single impurity. It is shown that the pattern of the quasiparticle scattering peaks in the full Brillouin zone of electron-doped cuprate superconductors is very different from that in the hole-doped case described by the Octet model. This difference is the result of the nonmonotonic d-wave superconducting gap in the electron-doped case. As the energy increases, the position of the local peaks in the Brillouin zone moves rapidly. In particular, the characteristic peaks of the electron-doped cuprate superconductors appear between the antinodal and nodal directions, unlike in the hole-doped case.

关键词： cuprate superconductors

Growth-Defense Tradeoffs in Plants： A Balancing Act to Optimize Fitness

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Molecular Plant 2014年第8期7卷 1267-1287页

作者： Bethany Huot Jian Yao Beronda L. Montgomery' sheng yang He Department of Energy Plant Research Laboratory Michigan State University MI 48824 USA Cell and Molecular Biology Program Michigan State University MI 48824 USA Department of Biochemistry and Molecular Biology Michigan State University MI 48824 USA Department of Plant Biology Michigan State University MI 48824 USA Howard Hughes Medical Institute-Gordon and Betty Moore Foundation Michigan State University MI 48933 USA

Growth-defense tradeoffs are thought to occur in plants due to resource restrictions, which demand prior- itization towards either growth or defense, depending on external and internal factors. These tradeoffs have profound implications in agriculture and natural ecosystems, as both processes are vital for plant survival, reproduction, and, ulti- mately, plant fitness. While many of the molecular mechanisms underlying growth and defense tradeoffs remain to be elucidated, hormone crosstalk has emerged as a major player in regulating tradeoffs needed to achieve a balance. In this review, we cover recent advances in understanding growth-defense tradeoffs in plants as well as what is known regard- ing the underlying molecular mechanisms. Specifically, we address evidence supporting the growth-defense tradeoff concept, as well as known interactions between defense signaling and growth signaling. Understanding the molecular basis of these tradeoffs in plants should provide a foundation for the development of breeding strategies that optimize the growth-defense balance to maximize crop yield to meet rising global food and biofuel demands.

关键词： plant immunity plant hormone salicylic acid jasmonate PAMP plant growth.

An extraordinary-performance gradient nanostructured Hadfield manganese steel containing multi-phase nanocrystalline-amorphous core-shell surface layer by laser surface processing

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Journal of Materials Science & Technology 2023年第3期134卷 209-222页

作者： Wanting Sun Jiasi Luo Yim Ying Chan J.H.Luan Xu-sheng yang Research Institute for Advanced Manufacturing Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHung HomHong KongChina Hong Kong Branch of National Rail Transit Electrification and Automation Engineering Technology Research Center The Hong Kong Polytechnic UniversityHung HomHong KongChina Department of Materials Science and Engineering City University of Hong KongHong KongChina

Reducing grain size(*** the fraction of grain boundaries)could effectively strengthen nanograined metals but inevitably sacrifices the ductility and possibly causes a strengthening-softening transition below a critical grain *** this work,a facile laser surface remelting-based technique was employed and optimized to fabricate a∼600μm-thick heterogeneous gradient nanostructured layer on an austenitic Hadfield manganese steel,in which the average grain size is gradually decreased from∼200μm in the matrix to only∼8 nm in the nanocrystalline-amorphous core-shell topmost ***-scale microstructural characterizations dissected the gradient refinement processes along the gradient direction,*** from the dislocations activities and twinning in sub-region to three kinds of martensitic transformations,and finally a multi-phase nanocrystalline-amorphous core-shell structural *** tests(***,bulk-specimen tensile,and micro-pillar compression)were conducted along the gradient *** confirms a tensile strength of∼1055 MPa and ductility of∼10.5%in the laser-processed ***,the core-shell structural surface maintains ultra-strong(tensile strength of∼1.6 GPa,micro-pillar compressive strength of∼4 GPa at a strain of∼8%,and nanoindentation hardness of∼7.7 GPa)to overcome the potential strengthening-softening *** significant strengthening effects are ascribed to the strength-ductility synergetic effects-induced extra work hardening ability in gradient nanostructure and the well-maintained dislocation activities inside extremely refined nanograins in the multi-phase nanocrystalline-amorphous core-shell structural surface,which are evidenced by atomic-scale observations and theoretical *** study provides a unique hetero-nanostructure through a facile laser-related technique for extraordinary mechanical performance.

关键词： Laser surface processing Hadfield manganese steel Gradient nanostructure Nanocrystalline-amorphous Martensitic transformation

Evaluation of a resoruf in-based fluorescent probe for tyrosinase detection in skin pigmentation disorders

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Bio-Design and Manufacturing 2021年第4期4卷 806-817页

作者： Yibo Hu Hongliang Zeng Jiaxing Jiang sheng yang Jinhua Huang Jing Chen Qinghai Zeng Department of Dermatology The Third Xiangya Hospital of Central South UniversityTongzipo Road No.138Yuelu DistrictChangsha 410013China Institute of Chinese Materia Medica Hunan Academy of Chinese MedicineChangsha 410006China School of Chemistry and Food Engineering Changsha University of Science and Technology(CSUST)Changsha 410114China

Purpose Skin pigmentation disorders,such as vitiligo and melasma,are difficult to diagnose in the early stages,but abnor-mal tyrosinase levels and tyrosinase activity are potential *** resorufin-based fluorescence probes(RBFPs)have been designed to detect tyrosinase in tumors,but they have not been used in skin pigmentation *** this study,one of these RBFPs(synthesized by resorufin salt coupled with 3-(bromomethyl)phenol)was evaluated *** The RBFP was tested in different kinds of mouse and human skin cells,as well as in in vivo models,including zebrafish,guinea pigs,and Sprague-Dawley *** addition,small interfering RNAs(siRNAs),kojic acid,and 1-phenyl-2-thiourea(PTU)were used to inhibit tyrosinase levels or tyrosinase *** This probe successfully detected tyrosinase and emitted red fluorescence in melanoma cells and *** was also observable in zebrafish and on the skin of guinea pigs when using the *** mouse and human cells,the RBFP showed good selectivity to ***,in the case of decreased tyrosinase levels or activity caused by siRNAs,kojic acid,or PTU,the probe was sensitive to these ***,the RBFP showed no toxic effects at concentrations of<20μmol/L,both in vitro and in *** Our findings indicate the value and limitations of the RBFP in tyrosinase detection,but suggest the need for further improvement of fluorescent probes in the diagnosis of skin pigmentation disorders.

关键词： Tyrosinase Pigmentation disorder Diagnosis Fluorescence probe

Combining gradient structure and supersaturated solid solution to achieve superior mechanical properties in WE43 magnesium alloy

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Journal of Materials Science & Technology 2022年第4期99卷 223-238页

作者： Wanting Sun Bo Wu Hui Fu Xu-sheng yang Xiaoguang Qiao Mingyi Zheng yang He Jian Lu San-Qiang Shi State Key Laboratory of Ultra-precision Machining Technology Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHung HomHong KongChina Hong Kong Polytechnic University Shenzhen Research Institute ShenzhenChina Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHung HomHong KongChina School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Centre for Composite Materials and Structures Harbin Institute of TechnologyHarbin 150080China Department of Mechanical Engineering City University of Hong KongKowloonHong KongChina

In this study,surface mechanical attrition treatment was employed to sucessfully produce a gradient nanostructured layer on WE43 magnesium alloy.X-ray diffraction,energy dispersive X-ray spectrometer,and high-resolution transmission electron microscope observations were mainly performed to uncover the microstructure evolution responsible for the refinement *** reveals that the grain refinement process consists of three transition stages along the depth direction from the core matrix to the topmost surface layer,i.e.,dislocation cells and pile-ups,ultrafine subgrains,and randomly orientated nanograins with the grain size of~40 ***,the original Mg;RE second phase is also experienced refinement and then re-dissolved into the α-Mg matrix phase,forming a supersaturated solid solution nanostructuredα-Mg phase in the gradient refined *** to the cooperative effects of grain refinement hardening,dislocation hardening,and supersaturated solid-solution hardening,the gradient nanostructured WE43 alloy contributes to the ultimate tensile strength of~435 MPa and ductility of~11.0%,showing an extraordinary strain hardening and mechanical properties among the reported severe plastic deformation-processed Mg *** work provides a new strategy for the optimization of mechanical properties of Mg alloys via combining the gradient structure and supersaturated solid solution.

关键词： Mg-RE alloy Surface mechanical attrition treatment Gradient nanostructure Supersaturated solid solution High strength and ductility Strengthening mechanisms

Joint space-time interference suppression method of GNSS receiver based on the maximum CNR criterion

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Joint space-time interference suppression method of GNSS rec...

Recent Progress in Endoplasmic Reticulum-Targetable Small-Molecule Probes for Fluorescence Sensing and Phototherapy

第五届中国卫星导航学术年会

作者： Guo Yi yang sheng Shen Rongjun Beijing Satellite Navigation Center School of Automation Science and Electrical Engineering of Beijing University of Aeronautics and Astronautics

ISBN: (纸本)9783642547362

Joint space-time adaptive process（STAP） is an advanced interference suppression method for GNSS receiver. The STAP method based on power inversion（PI） and beam forming（BF） optimal criterion is widely used. We usually hope that anti-jamming processing not only null the interference direction, but also beam forming the satellite signal for antenna array processing gain. But satellite signal is too weak to hardly estimation the direction of arrive（DOA）, and the estimation error cause anti-jamming performance drop quickly. Aim at this problem, a joint space-time anti-jamming method based on Maximum CNR criterion is proposed. Firstly, we use PI method to suppress interference primarily, and acquisition and tracking to get the desired code spread signal, and estimate the satellite signal direction vector. Then we compare the output CNR of PI and BF method, control the output to maximum the CNR of output signal. The proposed method not only avoid the complexity of traditional satellite DOA estimation, but also overcome the performance loss by the estimation error. The performance is much better than PI and BF method and the complexity is simple, it is benefit for engineer realization.

关键词： space‐time interference suppression power inversion beam forming carrier to noise ratio

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Journal of Analysis and Testing 2023年第3期7卷 304-324页

作者： Jing Chen Huihong Liu Wenzhi Xie Maoxin Gu Guojiang Mao sheng yang Hunan Provincial Key Laboratory of Cytochemistry School of Chemistry and Chemical EngineeringChangsha University of Science and TechnologyChangsha 410114China Laboratory of Chemical Biology and Traditional Chinese Medicine Research(Ministry of Education) College of Chemistry and Chemical EngineeringHunan Normal UniversityChangsha 410081China Henan Key Laboratory of Organic Functional Molecule and Drug Innovation Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsKey Laboratory of Green Chemical Media and ReactionsMinistry of EducationSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiang 453007China

The endoplasmic reticulum(ER)is the most widespread organelle within eukaryotic cells,performing various essential functions such as protein synthesis,post-translational modifications,and lipid *** fluctuations of biologically active species and microenvironments in the ER can disrupt homeostasis and eventually lead to ER stress,which is closely linked to the occurrence and progression of many human ***,the ER has been regarded as an important analytical object as well as a promising therapeutic target in both bio sensing and ***,there has been a growing interest in developing photon-excited molecular tools to uncover the physio pathological roles of ER and treat ERrelated *** review presents a comprehensive summary of recent advances in ER-targeted small-molecule probes and their applications for fluorescent sensing and phototherapy,mainly focusing on targeting strategies and probe design ***,we discuss the challenges involved with ER-targeted probes and highlight potential prospects in this field.

关键词： Endoplasmic reticulum Organelle-targetable fl uorescent probe Subcellular analysis Endoplasmic reticulum stress Phototherapy

Remote Sensing Image Deblurring Based on Grid Computation

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Journal of China University of Mining and Technology 2006年第4期16卷 409-412页

作者： LI sheng-yang ZHU Chong-guang GE Ping-ju Institute of Remote Sensing Applications Chinese Academy of Sciences Beijing 100101 China Academy of Opto-Electronics Chinese Academy of Sciences Beijing 100080 China College of Information Science and Engineering Shandong Agricultural University Tai＇an Shandong 271018 China

In general, there is a demand for real-time processing of mass quantity remote sensing images. However, the task is not only data-intensive but also computating-intensive. Distributed processing is a hot topic in remote sensing processing and image deblurring is also one of the most important needs. In order to satisfy the demand for quick proc- essing and deblurring of mass quantity satellite images, we developed a distributed, grid computation-based platform as well as a corresponding middleware for grid computation. Both a constrained power spectrum equalization algorithm and effective block processing measures, which can avoid boundary effect, were applied during the processing. The re- sult is satisfactory since computation efficiency and visual effect were greatly improved. It can be concluded that the technology of spatial information grids is effective for mass quantity remote sensing image processing.

关键词： grid computation image deblurring power spectrum equalization remote sensing image