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| 1 | Beam超前地质预报技术在铜锣山隧道中的应用显示文摘Beam是一种新型的电法超前预报技术,目前在国内应用很少。文章首先介绍了Beam超前地质预报方法的工作原理,然后结合Beam在国内垫邻高速公路铜锣山隧道施工中的首次应用,对该方法的具体工作过程和预报结果进行了介绍。与地质雷达、TSP预报结果以及实际开挖情况进行对比表明,Beam对掌子面前方水体具有良好的探测效果。最后对Beam在国内的推广应用提出了建议。 | 朱劲 李天斌 李永林 周大川 兰富安 姜洪涛 钱琳 | 2007 | 工程地质学报2007，15，2： | 53 |
| 2 | Longwall mining “cutting cantilever beam theory” and 110 mining method in China——The third mining science innovation显示文摘With the third innovation in science and technology worldwide, China has also experienced this marvelous progress. Concerning the longwall mining in China, the 'masonry beam theory'(MBT) was first proposed in the 1960 s, illustrating that the transmission and equilibrium method of overburden pressure using reserved coal pillar in mined-out areas can be realized. This forms the so-called '121mining method', which lays a solid foundation for development of mining science and technology in China. The 'transfer rock beam theory'(TRBT) proposed in the 1980 s gives a further understanding for the transmission path of stope overburden pressure and pressure distribution in high-stress areas. In this regard, the advanced 121 mining method was proposed with smaller coal pillar for excavation design,making significant contributions to improvement of the coal recovery rate in that era. In the 21 st century,the traditional mining technologies faced great challenges and, under the theoretical developments pioneered by Profs. Minggao Qian and Zhenqi Song, the 'cutting cantilever beam theory'(CCBT) was proposed in 2008. After that the 110 mining method is formulated subsequently, namely one stope face,after the first mining cycle, needs one advanced gateway excavation, while the other one is automatically formed during the last mining cycle without coal pillars left in the mining area. This method can be implemented using the CCBT by incorporating the key technologies, including the directional presplitting roof cutting, constant resistance and large deformation(CRLD) bolt/anchor supporting system with negative Poisson's ratio(NPR) effect material, and remote real-time monitoring technology. The CCBT and 110 mining method will provide the theoretical and technical basis for the development of mining industry in China. | Manchao He Guolong Zhu Zhibiao Guo | 2015 | Journal of Rock Mechanics and Geotechnical Engineering2015，7，5： | 57 |
| 3 | Progress in additive manufacturing on new materials: A review显示文摘Recent efforts and advances in additive manufacturing(AM) on different types of new materials are presented and reviewed. Special attention is paid to the material design of cladding layers, the choice of feedstock materials, the metallurgical behavior and synthesis principle during the AM process, and the resulted microstructures and properties, as well as the relationship between these factors. Thereafter,the trend of development in the future is forecasted, including: Effects of the particles size and size distribution of powders; Approaches for producing fine microstructures; Opportunities for creating new materials by AM; Wide applications in reconditioning of damaged components; Challenges for deep understanding and applications of the AMed new materials. The idea of 'Develop Materials' or 'Create Materials' by AM is highlighted, but a series of scientific, technological and engineering problems remain to be solved in future. | Neng Li Shuai Huang Guodong Zhang Renyao Qin Wei Liu Huaping Xiong Gongqi Shi Jon Blackburn | 2019 | Journal of Materials Science & Technology2019，35，2： | 47 |
| 4 | 锥束CT的发展与临床应用显示文摘锥束CT (Cone Beam Computer Tomo-graphy, CBCT),也可以称为锥束容积断层(Cone Beam Volumetric Tomography, CBVT),其图像系统称为锥束容积图像(Cone Beam Volumetric Imaging, CBVI)。 | 刘怡 | 2008 | 口腔正畸学2008，15，4： | 23 |
| 5 | 干涉理论对bottle beam的描述显示文摘对轴棱锥产生的贝塞尔光聚焦特性的描述,我们提出一种有别于惠更斯-菲涅耳衍射积分理论的解析表达.这种解析表达基于干涉理论的基础,它能够模拟计算出聚焦透镜置于最大准直距离之外以及在聚焦透镜焦平面以后的光束行为,能够更好地描述bottlebeam的形成过程,这些结果用衍射积分理论是得不到的.我们还得到了与Wei用几何光学分析所得出的当z0 | 曾夏辉 吴逢铁 刘岚 | 2007 | 物理学报2007，56，2： | 20 |
| 6 | Cone Beam CT技术及其在口腔正畸学中的应用显示文摘 | 赵颖 | 2008 | 口腔医学研究2008，24，5： | 19 |
| 7 | Theoretical analysis and experimental investigation on flexural performance of steel reinforced ultrahigh toughness cementitious composite (RUHTCC) beams显示文摘UHTCC (ultrahigh toughness cementitious composite), which is a kind of ultrahigh toughness cemen- titious composites material, exhibits pseudo strain hardening feature when subjected to tension load, and has enormous ductility and prominent crack dispersal ability. Accordingly, UHTCC can improve mechanical behavior of ordinary concrete structure especially its durability, and has been regarded as historical breakthrough to traditional cementitious materials. In this paper, the study focuses on flexure behavior of steel reinforced beam made of UHTCC. Based on the plane section assumption, along with two equilibrium equations of force and moment, the formulae to calculate the flexural load capability for the reinforced ultrahigh toughness cementitious composite (RUHTCC) beam were developed under the assumption that the compression stress- strain relationship in the UHTCC material is a bilinear model. Following this, the simplified formulae were further evolved by effective rectangle stress distribution approach in order to facilitate design of practical engineering. Two effective parameters introduced in effective rectangle approach were determined. The mathematical expressions to evaluate limited rein- forcement ratio, flexural stiffness as well as ductility index were proposed, too. Last, two series of dif- ferent reinforcement ratios of the RUHTCC beams were tested in four-point flexure loading. For com- parison purposes, ordinary RC (reinforced concrete) beams also were prepared. Both moment curva- ture curves and load mid-span displacement curves were recorded and compared with the theoretical calculations. A good agreement between them was found, which validates the proposed theoretical formulae. For ductility index, a slightly big difference between the experimental values and the calcu- lated ones exists. The experimental results show that, compared to control RC beams, the RUHTCC beam can improve both flexural capacity and ductility index, and the degree of improvement will de- crease with the increase in the reinforcement ratio. Particularly, the results also reveal that lager crack width in control beams can be greatly reduced by formation of tightly-spaced fine cracks in UHTCC, which offers more durable structures. | XU ShiLang ZHANG XiuFang | 2009 | Science China(Technological Sciences)2009，52，4： | 18 |
| 8 | First experimental demonstration of coherent beam combining of more than 100 beams显示文摘Coherent beam combining of 107 beams has been demonstrated for the first time to the best of our knowledge.When the system was in closed loop,the pattern in far-field was stable and the fringe contrast was>96%.The impact of the dynamic tilt error,the piston error,and power inconsistency was theoretically analyzed.Meanwhile,the distribution law of dynamic tilt error was estimated and the correlation of the tilt dithering of different axis was analyzed statistically.The ratio of power in the central lobe was^22.5%.The phase residue error in the closed loop was~λ∕22,which was evaluated by the root-mean-square error of the signal generated from the photoelectric detector. | HONGXIANG CHANG QI CHANG JIACHAO XI TIANYUE HOU RONGTAO SU PENGFEI MA JIAN WUCAN LI MAN JIANG YANXING MA PU ZHOU | 2020 | Photonics Research2020，8，12： | 17 |
| 9 | 梯度轴棱锥产生单个Bottle beam显示文摘首次提出一种新的梯度轴棱锥模型,这种梯度轴棱锥在传统的轴棱锥基础上,将轴棱锥顶点的锥角设计成具有一定的梯度.平面波入射到这种梯度轴棱锥,其衍射场会形成两个区域的Bessel光,并且在这两个Bessel光之间形成一个Bottle beam(局域空心光束).由于Bottle beam具有三维封闭的空心区域和极高的强度梯度,可用作激光导管、光镊和光学扳手等,在生命科学和纳米科技中有重要应用.从几何光学角度分析了梯度轴棱锥形成单个Bottle beam的原理,由衍射及相干理论,分析和模拟了纵向剖面光强分布和横截面光强分布.研究结果对梯度轴棱锥的设计和应用具有指导意义. | 吴逢铁 江新光 刘彬 邱振兴 | 2009 | 物理学报2009，58，4： | 17 |
| 10 | Coherent beam combining of high powerfiber lasers: Progress and prospect显示文摘The recent research progress of coherent beam combining of high power fiber lasers is reviewed. Key technologies like coherently combinable fiber laser, phase control of multiple beams and beam tilling are specially analyzed. Prospects for single coherently combinable high power fiber amplifier, beam tilling and target-in-the-loop control for propagation in real atmosphere are presented. | LIU ZeJin ZHOU Pu XU XiaoJun WANG XiaoLin MA YanXing | 2013 | Science China(Technological Sciences)2013，56，7： | 16 |
| 11 | Development status of high power fiber lasers and their coherent beam combination显示文摘High-power fiber laser has been emerged great potential in a wide range of applications and becomes a robust candidate for high energy solid state laser system. To further increase the output brightness of single-channel fiber laser, high-brightness pump sources and high-power-handling passive components should be fabricated and utilized in the fiber laser systems, in addition to the advanced techniques for multiple nonlinear effects managements. The state-of-the-art high power fiber lasers are reviewed, in terms of narrow-linewidth fiber lasers, broadband fiber lasers and fiber lasers at 2 μm. Coherent beam combining is a promising technique to obtain higher output power while maintaining excellent beam quality simultaneously,which breaks through the bottlenecks of single-channel fiber laser. Based on a series of key techniques for coherent beam combining, high-power coherent beam combining of fiber lasers could be enabled with high combining efficiency. In this paper, we review the progress of high-power fiber lasers and their coherent beam combining in the recent decade, particularly the relevant work in our group. The future prospects of fiber lasers and coherent beam combining technique are also discussed. | Zejin LIU Xiaoxi JIN Rongtao SU Pengfei MA Pu ZHOU | 2019 | Science China(Information Sciences)2019，62，4： | 15 |
| 12 | BEAM地质超前预报系统在锦屏引水隧洞TBM施工中的应用显示文摘BEAM系统作为一种新型的电法超前地质预报技术,具有设备简便、易于操作、可实时准确探测并显示前方地质情况等特点,在锦屏二级水电站1号引水隧洞TBM401-319掘进机上应用,取得了很好的效果,值得推广应用。 | 高振宅 | 2009 | 铁道建筑技术2009，，11： | 15 |
| 13 | Steady-state responses of axially accelerating viscoelastic beams: Approximate analysis and numerical confirmation显示文摘Nonlinear parametric vibration of axially accelerating viscoelastic beams is inves-tigated via an approximate analytical method with numerical confirmations. Based on nonlinear models of a finite-small-stretching slender beam moving at a speed with a periodic fluctuation, a solvability condition is established via the method of multiple scales for subharmonic resonance. Therefore, the amplitudes of steady-state periodic responses and their existence conditions are derived. The amplitudes of stable steady-state responses increase with the amplitude of the axial speed fluctuation, and decrease with the viscosity coefficient and the nonlinear coefficient. The minimum of the detuning parameter which causes the existence of a stable steady-state periodic response decreases with the amplitude of the axial speed fluctuation, and increases with the viscosity coefficient. Nu-merical solutions are sought via the finite difference scheme for a nonlinear par-tial-differential equation and a nonlinear integro-partial-differential equation. The calculation results qualitatively confirm the effects of the related parameters pre-dicted by the approximate analysis on the amplitude and the existence condition of the stable steady-state periodic responses. Quantitative comparisons demonstrate that the approximate analysis results have rather high precision. | CHEN LiQun1,2 & DING Hu2 1 Department of Mechanics, Shanghai University, Shanghai 200444, China 2 Shanghai Institute of Applied Mathematics and Mechanics, Shanghai 200070, China | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，11： | 15 |
| 14 | Modeling and power performance improvement of a piezoelectric energy harvester for low-frequency vibration environment显示文摘A novel oscillator structure, bimorph piezoelectric cantilever beam with two-stepped variable thicknesses,is proposed to improve the energy harvestingperformance of the vibration energy harvester (VEH) under low-frequency vibration environment. Firstly, the piezoelectric cantilever is segmented to obtain the energy functions based on the Euler-Bernoulli beam assumptions, and the Galerkin approach is utilized to discretize the energy functions. Applying boundary conditions and continuity conditions enforced at separation locations, the electromechanical coupled governing equations for the piezoelectric energy harvesterareintroduced by means of the Lagrange equations. Furthermore, the steady state response expressions are obtained for harmonic base excitations at arbitrary frequencies. Numerical results are computed and the effects ofthe lengths-ratio, thicknesses-ratio,end thicknessand load resistance on the output voltage, harvested power and power density are discussed. Moreover, to verify thecorrectness ofanalytical results, the finite element method (FEM)simulationis also conducted to analyze performance of the proposed VEH, where a good agreement is presented. All the results show thatthe present oscillator structureis moreefficient than the conventional uniform beam structure, specifically, for vibration energy harvesting in low-frequency environment. | Dongxing Cao Yanhui Gao Wenhua Hu | 2019 | Acta Mechanica Sinica2019，35，4： | 15 |
| 15 | All-optical active THz metasurfaces for ultrafast polarization switching and dynamic beam splitting显示文摘Miniaturized ultrafast switchable optical components with an extremely compact size and a high-speed response will be the core of next-generation all-optical devices instead of traditional integrated circuits,which are approaching the bottleneck of Moore’s Law.Metasurfaces have emerged as fascinating subwavelength flat optical components and devices for light focusing and holography applications.However,these devices exhibit a severe limitation due to their natural passive response.Here we introduce an active hybrid metasurface integrated with patterned semiconductor inclusions for all-optical active control of terahertz waves.Ultrafast modulation of polarization states and the beam splitting ratio are experimentally demonstrated on a time scale of 667 ps.This scheme of hybrid metasurfaces could also be extended to the design of various free-space all-optical active devices,such as varifocal planar lenses,switchable vector beam generators,and components for holography in ultrafast imaging,display,and high-fidelity terahertz wireless communication systems. | Longqing Cong Yogesh Kumar Srivastava Huifang Zhang Xueqian Zhang Jiaguang Han Ranjan Singh | 2018 | Light(Science & Applications)2018，7，1： | 15 |
| 16 | Introduction of rice chitinase gene into wheat via low energy Ar^+ beam implantation显示文摘A chitinase gene (RCH8) in plasmid vector pCAMBIA1308 was delivered into 3 wheat cultivars (Yangmai 158, Wan 9210, Wanmai 32) by low energy Ar+ beam-mediated method. Preliminary calli from treated mature embryos were first selected on hygromycin (Hm, 20 or 30 mg/L) containing medium. After the resistant calli formed, they were transferred to the regeneration medium with 10 or 20 mg/L Hm. All the three wheat varieties obtained trans-genie plants. PCR and PCR-Southern assays showed that most plants regenerated from the resistant calli were positive transgenic plants. Southern blot of the positive green plants confirmed stable integration of alien DNA into wheat genome. The plant transformation frequencies varied with the variety and ion dose implanted. Wanmai 32 possessed the highest transformation frequency, reaching 3.8% at a suitable implantation dose. The transformation frequency of Yangmai 158 and Wan 9210 varied from 0.5% to 2.5% and from 0.5% to 1.4%, respectively. Progeny test for resistance to | WU Lifang LI Hong FENG Huiyun WU Lijun YU Zengliang | 2001 | Chinese Science Bulletin2001，46，4： | 14 |
| 17 | 隧道工程超前地质预报中的综合物探技术显示文摘在隧道超前预报中,由于物探方法的间接性和多解性,单一的物探方法作为超前预报手段往往会出现成果解释的不可靠性,因此必须采用多种物探方法进行综合预报、综合分析、相互印证,才能提高成果的精度。本文通过介绍应用TSP203p lus作为中长距离的宏观控制,地质雷达、BEAM作短距离精确探测,并采取钻孔雷达作进一步预报的综合物探技术的预报体系在隧洞超前地质预报中的成功实例,展示了综合物探技术在隧洞超前预报中的广阔前景。 | 谭天元 叶勇 张伟 | 2006 | 贵州水力发电2006，20，6： | 14 |
| 18 | Additive manufacturing of Ti-6Al-4V lattice structures with high structural integrity under large compressive deformation显示文摘Additively manufactured Ti-6 Al-4 V lattice structures have found important niche applications. However, they often show insufficient compressive ductility or insufficient structural integrity. In this study,a batch of 45 octahedral Ti-6 Al-4 V lattice structures was manufactured in three different strut diameters(0.5, 1.0, 1.5 mm) by selective electron beam melting(SEBM). The influence of post-SEBM annealing on the compressive deformation characteristics of the lattice structure was investigated. The as-built Ti-6 Al-4 V lattices fragmented when the compressive strain reached 13%–23% depending on strut diameter.Annealing at 950?C(β transus temperature: 995?C) only slightly improved the compressive ductility of the lattice structures. However, annealing at 1050?C(β-annealing) fundamentally changed the compressive deformation mode of the lattice structures. The resultant compressive stress-strain curve was featured by a long smooth plateau and no facture occurred even after significant densification of the lattice structure had taken place(>50% of compressive strain). | Kun Yang Jian Wang Liang Jia Guangyu Yang Huiping Tang Yuanyuan Li | 2019 | Journal of Materials Science & Technology2019，35，2： | 12 |
| 19 | Cu_2ZnSnS_4 thin films prepared by sulfurization of ion beam sputtered precursor and their electrical and optical properties显示文摘Cu2ZnSnS4 (CZTS) thin films were successfully prepared by sulfurization of ion bean sputtered precursors on soda-lime glass substrate. The single phase of stannite-type structure CZTS films were obtained as revealed in EDS and XRD analysis when the ratios of the constituents of CZTS thin films are close to stoichiometric by optimizing the conditions of precursor preparation and sulfurization. A low sheet resistivity as about 0.156 Ω·cm and a high absorption coefficient as 1×104 cm-1 were achieved in this method by Hall effect measurements and UV-VIS spectrophotometer. The optical band-gap energy of the CZTS sample is about 1.51 eV, which is very close to the optimum value for a solar-cell absorber. | ZHANG Jun SHAO Lexi FU Yujun XIE Erqing | 2006 | Rare Metals2006，25，z1： | 11 |
| 20 | Welding of nickel free high nitrogen stainless steel: Microstructure and mechanical properties显示文摘High nitrogen stainless steel(HNS) is a nickel free austenitic stainless steel that is used as a structural component in defence applications for manufacturing battle tanks as a replacement of the existing armour grade steel owing to its low cost, excellent mechanical properties and better corrosion resistance.Conventional fusion welding causes problems like nitrogen desorption, solidification cracking in weld zone, liquation cracking in heat affected zone, nitrogen induced porosity and poor mechanical properties.The above problems can be overcome by proper selection and procedure of joining process. In the present work, an attempt has been made to correlate the microstructural changes with mechanical properties of fusion and solid state welds of high nitrogen steel. Shielded metal arc welding(SMAW), gas tungsten arc welding(GTAW), electron beam welding(EBW) and friction stir welding(FSW) processes were used in the present work. Optical microscopy, scanning electron microscopy and electron backscatter diffraction were used to characterize microstructural changes. Hardness, tensile and bend tests were performed to evaluate the mechanical properties of welds. The results of the present investigation established that fully austenitic dendritic structure was found in welds of SMAW. Reverted austenite pools in the martensite matrix in weld zone and unmixed zones near the fusion boundary were observed in GTA welds. Discontinuous ferrite network in austenite matrix was observed in electron beam welds.Fine recrystallized austenite grain structure was observed in the nugget zone of friction stir welds.Improved mechanical properties are obtained in friction stir welds when compared to fusion welds. This is attributed to the refined microstructure consisting of equiaxed and homogenous austenite grains. | Raffi Mohammed G.Madhusudhan Reddy K.Srinivasa Rao | 2017 | Defence Technology(防务技术)2017，13，2： | 11 |
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