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| 1 | Failure mechanism and coupled static-dynamic loading theory in deep hard rock mining: A review显示文摘Rock failure phenomena,such as rockburst,slabbing(or spalling) and zonal disintegration,related to deep underground excavation of hard rocks are frequently reported and pose a great threat to deep mining.Currently,the explanation for these failure phenomena using existing dynamic or static rock mechanics theory is not straightforward.In this study,new theory and testing method for deep underground rock mass under coupled static-dynamic loading are introduced.Two types of coupled loading modes,i.e.'critical static stress + slight disturbance' and 'elastic static stress + impact disturbance',are proposed,and associated test devices are developed.Rockburst phenomena of hard rocks under coupled static-dynamic loading are successfully reproduced in the laboratory,and the rockburst mechanism and related criteria are demonstrated.The results of true triaxial unloading compression tests on granite and red sandstone indicate that the unloading can induce slabbing when the confining pressure exceeds a certain threshold,and the slabbing failure strength is lower than the shear failure strength according to the conventional Mohr-Column criterion.Numerical results indicate that the rock unloading failure response under different in situ stresses and unloading rates can be characterized by an equivalent strain energy density.In addition,we present a new microseismic source location method without premeasuring the sound wave velocity in rock mass,which can efficiently and accurately locate the rock failure in hard rock mines.Also,a new idea for deep hard rock mining using a non-explosive continuous mining method is briefly introduced. | Xibing Li Fengqiang Gong Ming Tao Longjun Dong Kun Du Chunde Ma Zilong Zhou Tubing Yin | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，4： | 68 |
| 2 | The Interannual Variability of East Asian Monsoon and Its Relationship with SST in a Coupled Atmosphere-Ocean-Land Climate Model显示文摘Based on a 200 year simulation and reanalysis data (1980-1996), the general characteristics of East Asian monsoon (EAM) were analyzed in the first part of the paper. It is clear from this research that the South Asian monsoon (SAM) defined by Webster and Yang (1992) is geographically and dynamically different from the East Asian monsoon (EAM). The region of the monsoon defined by Webster and Yang (1992) is located in the tropical region of Asia (40-110°E, 10-20°N), including the Indian monsoon and the Southeast Asian monsoon, while the EAM defined in this paper is located in the subtropical region of East Asia (110-125°E, 20-40°N). The components and the seasonal variations of the SAM and EAM are different and they characterize the tropical and subtropical Asian monsoon systems respectively. A suitable index (EAMI) for East Asian monsoon was then defined to describe the strength of EAM in this paper. In the second part of the paper, the interannual variability of EAM and its relationship with sea surface temperature (SST) in the 200 year simulation were studied by using the composite method, wavelet transformation. and the moving correlation coefficient method. The summer EAMI is negatively correlated with ENSO (E1 Nino and Southern Oscillation) cycle represented by the NINO3 sea surface temperature anomaly (SSTA) in the preceding April and January. while the winter EAM is closely correlated with the succeeding spring SST over the Pacific in the coupled model. The general differences of EAM between E1 Nino and La Nina cases were studied in the model through composite analysis. It was also revealed that the dominating time scales of EAM variability may change in the long-term variation and the strength may also change. The anomalous winter EAM may have some correlation with the succeeding summer EAM. but this relationship may disappear sometimes in the long-term climate variation. Such time-dependence was found in the relationship between EAM and SST in the long-term climate simulation as well. | 王会军 | 2000 | Advances in Atmospheric Sciences2000，17，1： | 33 |
| 3 | Pathways of Influence of the Northern Hemisphere Mid–high Latitudes on East Asian Climate: A Review显示文摘This paper reviews recent progress made by Chinese scientists on the pathways of influence of the Northern Hemisphere mid-high latitudes on East Asian climate within the framework of a“coupled oceanic-atmospheric(land-atmospheric or seaice-atmospheric)bridge”and“chain coupled bridge”.Four major categories of pathways are concentrated upon,as follows:Pathway A—from North Atlantic to East Asia;Pathway B—from the North Pacific to East Asia;Pathway C—from the Arctic to East Asia;and Pathway D—the synergistic effects of the mid-high latitudes and tropics.In addition,definitions of the terms“combined effect”,“synergistic effect”and“antagonistic effect”of two or more factors of influence or processes and their criteria are introduced,so as to objectively investigate those effects in future research. | Jianping LI Fei ZHENG Cheng SUN Juan FENG Jing WANG | 2019 | Advances in Atmospheric Sciences2019，36，9： | 27 |
| 4 | 非下采样剪切波变换的医学图像融合显示文摘目的由于单模态医学图像所提供的信息有限,不能反映相关组织所有细节信息,可能会造成临床医学误诊。针对这一问题,提出一种基于非下采样剪切波变换(NSST)的医学图像融合算法,对多模态医学图像进行融合,丰富融合图像信息,提高图像质量,为临床诊断提供依据。方法首先,将源图像进行NSST变换得到低频子带和若干高频方向子带;其次,根据低频子带图像的特点,提出低频系数与脉冲耦合神经网络PCNN(pulse coupled neural network)相结合的方法;根据高频子带间结构相似度SSIM(structure similarity)不同,分为低相似和高相似子带图像;对低相似子带系数采用视觉敏感度系数VSC(visual sensitivity coefficient)与改进梯度能量相结合的策略;高相似子带系数采用VSC与区域能量相结合的方法;进而,选取结构相似度与边缘信息评价因子QABF(edge based similarity measure)之和作为目标函数,自适应地优化可调参数;最后,经逆NSST变换重构图像。结果对灰度图像和彩色图像进行实验仿真,并与其他4种融合方法进行比较,在主观视觉效果和客观评价标准,本文方法取得良好的融合效果,其中边缘评价因子和标准差都是最好的,其他指标相对较好;与靳珍怡提出的基于非下采样轮廓波变换的多模态医学图像融合相比,5组实验空间频率分别提高了11.8%、24.7%、83.4%、11.9%、30.3%;边缘评价因子分别提高了6.7%、15%、40%、50%、12%;结构相似度分别提高了0.7%、7.3%、2.4%、-3.6%、2.1%;交叉熵分别降低了16.9%、1.6%、-27.4%、6.1%、0.4%。结论本文算法有效提高多模态医学图像融合质量,增加不同模态间的互补信息;与现有医学图像融合算法相比,本文算法更加优越。融合图像细节信息更为突出,整体信息更丰富,更符合人眼视觉特性。 | 楼建强 李俊峰 戴文战 | 2017 | 中国图象图形学报2017，22，11： | 18 |
| 5 | 地质样品Sr同位素激光原位等离子体质谱(LA-MC-ICP-MS)测定显示文摘Sr同位素在研究岩浆演化及其源区具有重要的示踪作用。MC-ICP-MS的出现为具有高Sr含量地质样品的激光原位Sr同位素测定变成了现实。本文利用Netpune MC-ICP-MS和193nm准分子激光联机,通过滨珊瑚、斜长石、磷灰石和钙钛矿等系列实验,建立了激光原位Sr同位素测定方法。实验结果表明,激光Sr同位素测定中Kr、Rb和稀土元素二价离子的干扰能够有效扣除,而钙聚合物的干扰在Neptune型MC-ICP-MS并不显著。不同激光参数的实验表明,大激光束斑产生更高信号强度,因而Sr同位素精度更高,同一激光束斑大小,激光脉冲频率对Sr同位素精度无明显影响。 | 杨岳衡 吴福元 谢烈文 杨进辉 张艳斌 | 2009 | 岩石学报2009，25，12： | 16 |
| 6 | Sensitivity of sea ice and ocean simulations to sea ice salinity in a coupled global climate model显示文摘The impacts of the spatiotemporal variations of sea ice salinity on sea ice and ocean characteristics have not been studied in detail, as the existing climate models neglect or misrepresent this process. To address this issue, this paper formulated a parameterization with more realistic sea ice salinity budget, and examined the sensitivity of sea ice and ocean simulations to the ice salinity variations and associated salt flux into the ocean using a coupled global climate model. Results show that the inclusion of such a parameterization leads to an increase and thickening of sea ice in the Eurasian Arctic and within the ice pack in the Antarctic circumpolar region, and a weakening of the North Atlantic Deep Water and a strengthening of the Antarctic Bottom Water. The atmospheric responses associated with the ice changes were also discussed. | LIU JiPing State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China | 2010 | Science China Earth Sciences2010，53，6： | 15 |
| 7 | Dynamic explicit FE modeling of hot ring rolling process | 王敏 杨合 孙志超 郭良刚 欧新哲 | 2006 | Transactions of Nonferrous Metals Society of China2006，7，6： | 15 |
| 8 | Ideal root architecture for phosphorus acquisition of plants under water and phos-phorus coupled stresses: From simulation to application显示文摘Under water and phosphorus (P) coupled stresses, root architecture may be related to P acquisition efficiency of plants. Understanding the relationship between root architecture and P acquisition efficiency may provide basic information for improving P acquisition efficiency of plants. In the present study, we quantitatively described the effects of root architecture on P acquisition efficiency by computer simulation together with controlled biological experiments so as to determine an ideal root architecture for efficient P acquisition under water and P coupled stresses. Our results indicate that under given soil water conditions, the ideal root architecture for P acquisition efficiency of a tap root plant (as represented by common bean) is an 搖mbrella-shape?root system whose basal roots tend to be shallow in the P-rich topsoil and tap roots tend to be deep for water in the subsoil. Meanwhile, the ideal root architecture for a fibrous root plant (as represented by upland rice) is a beard-shape?root system with the moderately dispersed yet uniformly distributed adventitious and lateral roots so as to keep most roots in the topsoil for P and a few roots in the subsoil for water. | LIAO Hong GE Zhenyang YAN Xiaolong | 2001 | Chinese Science Bulletin2001，46，16： | 14 |
| 9 | Three-Dimensional Thermo-mechanical Coupled FEM Simulation for Hot Continuous Rolling of Large-Diameter Mandrel Bar显示文摘Based on the important boundary conditions of rolling simulation including friction, heat conduction and interactionsof the workpiece and rolls, the hot continuous rolling processes of large-diameter mandrel round bar (200 mm indiameter) in 6VH-stand hot tandem mill are successfully simulated by three-dimensional coupled thermomechanicalelastoplastic finite element method (FEM). The distributions of stress, strain, temperature and the rolling force andtorque for the two-pass and four-pass continuous rolling are calculated respectively. Thus, the two and four-passroll schedules are verified, respectively. The simulation results show that it is safe to produce 200 mm round barby the two-pass (oval pass and round pass) continuous rolling on the existing equipment compared to the four-passcontinuous rolling. There are concave surfaces and increased widths occurring at the end of rolled billet due touneven deformations between the outside and inside of the workpiece as well as the free spreading close to the rollgap of the final pass. | Huiping HONG Yonglin KANG Changtao FENG Xiqiang CHEN | 2003 | Journal of Materials Science & Technology2003，19，z1： | 13 |
| 10 | Dynamics of vehicle-pavement coupled system based on a revised flexible roller contact tire model显示文摘A revised flexible roller contact tire model (RFRC tire model) is proposed, which considers not only the geometric and flexible filtering effect, but also tire damping and pavement displacement. A vehi- cle-pavement coupled system is modeled as a two DOF oscillator moving along a simply supported beam on a linear viscoelastic foundation. By using the Galerkin’s and Direct Integral method, dynamical responses of the vehicle-pavement coupled system are obtained based on the RFRC tire model and the traditional single point contact tire model (SPC tire model). The simulation results are compared with test data and the validity of the proposed RFRC tire model is verified. Differences between the two models are also investigated. It is found that the dynamical behaviors for both models agree with each other quite well when road surface roughness is a long harmonic wave. On the other hand, they are different under short harmonic wave or impulse road excitation. Thus the RFRC tire model should be used to compute the tire force and investigate dynamical responses of vehicle and pavement. | YANG ShaoPu LI ShaoHua LU YongJie | 2009 | Science China(Technological Sciences)2009，52，3： | 13 |
| 11 | Stability analysis of unsaturated soil slope during rainfall infiltration using coupled liquid-gas-solid three-phase model显示文摘Generally, most soil slope failures are induced by rainfall infiltration, a process that involves interactions between the liquid phase, gas phase,and solid skeleton in an unsaturated soil slope. In this study, a loosely coupled liquid-gas-solid three-phase model, linking two numerical codes,TOUGH2/EOS3, which is used for water-air two-phase flow analysis, and FLAC^(3D), which is used for mechanical analysis, was established. The model was validated through a documented water drainage experiment over a sandy column and a comparison of the results with measured data and simulated results from other researchers. The proposed model was used to investigate the features of water-air two-phase flow and stress fields in an unsaturated soil slope during rainfall infiltration. The slope stability analysis was then performed based on the simulated water-air two-phase seepage and stress fields on a given slip surface. The results show that the safety factor for the given slip surface decreases first, then increases, and later decreases until the rainfall stops. Subsequently, a sudden rise occurs. After that, the safety factor decreases continually and reaches its lowest value, and then increases slowly to a steady value. The lowest value does not occur when the rainfall stops, indicating a delayed effect of the safety factor. The variations of the safety factor for the given slip surface are therefore caused by a combination of pore-air pressure, matric suction, normal stress, and net normal stress. | Dong-mei Sun Xiao-min Li Ping Feng Yong-ge Zang | 2016 | Water Science and Engineering2016，9，3： | 12 |
| 12 | 电容器铝壳表面缺陷检测的CCD图像处理显示文摘在铝电解电容器铝壳生产过程中,为了确保产品品质,降低消耗,应快速检测铝壳表面发生的质量情况,对异常现象能及时地作出报警、停机或自动分离提供判断依据。首先对采集到的铝壳图像进行灰度处理、中值滤波、二值化和边缘检测等处理,然后通过缺陷特征的提取,确定铝壳样件是否存在表面缺陷,根据检测结果将有缺陷的样件筛选出来。通过对主要缺陷样件的检测结果表明通过机械辅助设备可以实现在1s内同时检测约20个样件,能够满足整体加工流程对快速检测表面缺陷的技术要求。 | 田原嫄 潘敏凯 刘思阳 | 2013 | 组合机床与自动化加工技术2013，，5： | 12 |
| 13 | Thermal-mechanical coupled effect on fracture mechanism and plastic characteristics of sandstone显示文摘Scanning electronic microscopy (SEM) was employed to investigate fractographs of sandstone in mine roof strata under thermal-mechanical coupled effect. Based on the evolution of sandstone surface morphology in the failure process and frac- tography, the fracture mechanism was studied and classified under meso and mi- cro scales, respectively. The differences between fractographs under different tem- peratures were examined in detail. Under high temperature, fatigue fracture and plastic deformation occurred in the fracture surface. Therefore, the temperature was manifested by these phenomena to influence strongly on micro failure mechanism of sandstone. In addition, the failure mechanism would transit from brittle failure mechanism at low temperature to coupled brittle-ductile failure mechanism at high temperature. The variation of sandstone strength under differ- ent temperature can be attributed to the occurrence of plastic deformation, fatigue fracture, and microcracking. The fatigue striations in the fracture surfaces under high temperature may be interpreted as micro fold. And the coupled effect of tem- perature and tensile stress may be another formation mechanism of micro fold in geology. | ZUO JianPing1,2, XIE HePing2,3, ZHOU HongWei1,2 PENG SuPing1 1 State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China 2 Institute of Rock Mechanics and Fractals, China University of Mining and Technology, Beijing 100083, China 3 Sichuan University, Chengdu 610065, China | 2007 | Science China(Technological Sciences)2007，50，6： | 11 |
| 14 | Liquid propellant analogy technique in dynamic modeling of launch vehicle显示文摘The coupling effects among lateral mode,longitudinal mode and torsional mode of a launch vehicle cannot be taken into account in traditional dynamic analysis using lateral beam model and longitudinal spring-mass model individually.To deal with the problem,propellant analogy methods based on beam model are proposed and coupled mass-matrix of liquid propellant is constructed through additional mass in the present study.Then an integrated model of launch vehicle for free vibration analysis is established,by which research on the interactions between longitudinal and lateral modes,longitudinal and torsional modes of the launch vehicle can be implemented.Numerical examples for tandem tanks validate the present method and its necessity. | PAN ZhongWen 1,2 ,XING YuFeng 1 ,ZHU LiWen 2 ,DONG Kai 2 &SUN Mu 2 1Solid Mechanics Research Center,Beijing University of Aeronautics and Astronautics,Beijing 100191,China 2 Beijing Astronautics Systems Engineering Institute,Beijing 100076,China | 2010 | Science China(Technological Sciences)2010，53，8： | 11 |
| 15 | Climate Sensitivity and Feedbacks of a New Coupled Model CAMS-CSM to Idealized CO_2 Forcing: A Comparison with CMIP5 Models显示文摘Climate sensitivity and feedbacks are basic and important metrics to a climate system. They determine how large surface air temperature will increase under CO_2 forcing ultimately, which is essential for carbon reduction policies to achieve a specific warming target. In this study, these metrics are analyzed in a climate system model newly developed by the Chinese Academy of Meteorological Sciences(CAMS-CSM) and compared with multi-model results from the Coupled Model Comparison Project phase 5(CMIP5). Based on two idealized CO_2 forcing scenarios, i.e.,abruptly quadrupled CO_2 and CO_2 increasing 1% per year, the equilibrium climate sensitivity(ECS) and transient climate response(TCR) in CAMS-CSM are estimated to be about 2.27 and 1.88 K, respectively. The ECS is near the lower bound of CMIP5 models whereas the TCR is closer to the multi-model ensemble mean(MME) of CMIP5 due to compensation of a relatively low ocean heat uptake(OHU) efficiency. The low ECS is caused by an unusually negative climate feedback in CAMS-CSM, which is attributed to cloud shortwave feedback(λSWCL) over the tropical Indo-Pacific Ocean.The CMIP5 ensemble shows that more negative λSWCL is related to larger increase in low-level(925–700 hPa)cloud over the tropical Indo-Pacific under warming, which can explain about 90% of λSWCL in CAMS-CSM. Static stability of planetary boundary layer in the pre-industrial simulation is a critical factor controlling the low-cloud response and λSWCL across the CMIP5 models and CAMS-CSM. Evidently, weak stability in CAMS-CSM favors lowcloud formation under warming due to increased low-level convergence and relative humidity, with the help of enhanced evaporation from the warming tropical Pacific. Consequently, cloud liquid water increases, amplifying cloud albedo, and eventually contributing to the unusually negative λSWCL and low ECS in CAMS-CSM. Moreover, the OHU may influence climate feedbacks and then the ECS by modulating regional sea surface temperature responses. | Xiaolong CHEN Zhun GUO Tianjun ZHOU Jian LI Xinyao RONG Yufei XIN Haoming CHEN Jingzhi SU | 2019 | Journal of Meteorological Research2019，33，1： | 11 |
| 16 | Development of the universal and simplified soil model coupling heat and water transport显示文摘It is very important to develop a universal soil model with higher simplicity and more accuracy, which can be widely applied to very general cases such as wet or dry soil, frozen or unfrozen soil and homogeneous or heterogeneous soil. Firstly in this study, based on analysis of both magnitude order and the numerical simulation results, the universal and simplified soil model (USSM) coupling heat and mass transport processes is developed. Secondly, in order to avoid the greater uncertainty caused by the phase change term in numerical iteration process for the model solution obtaining, new version of the universal simplified soil model (NUSSM) is further derived through variables transformation, and accordingly a more efficient numerical scheme for the new version is designed well. The simulation results from the NUSSM agree with the results from more complicated and accurate soil model very well, also reasonably reproduce the observed data under widely real conditions. The new version model, because of its simplicity, will match for the development of land surface model. | LI Qian1,2 & SUN ShuFen1 1 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China 2 Graduate University of the Chinese Academy of Sciences, Beijing 100049, China | 2008 | Science China Earth Sciences2008，51，1： | 11 |
| 17 | Asymptotic state behaviour and its modeling for saturated sand显示文摘A new double hardening elasto-plastic model is proposed in this paper based on the existing unified hardening model (UH model). By assuming that there is part coupling effect between the plastic volumetric strain and plastic shear strain, hardening parameters consisting of a coupled and an uncoupled components are adopted in this model. A unique feature of this model is that it can describe not only the conventional drained and undrained behaviors of soil, but also the stress-strain relationships of soil under partially drained conditions which can be volumetric compression or dilation. Adopting the asymptotic state concept, simple equations for estimating the limiting stress ratio under undrained or earth pressure at rest (i.e. K0) conditions are derived. The new model is relatively simple to be adopted in practice for two reasons. First, the same soil parameters as in Cam-clay model are used except the addition of one extra parameter, the stress ratio at the characteristic state. Second, all the parameters can be determined using conventional triaxial compression tests. | LUO Ting YAO YangPing CHU Jian | 2009 | Science China(Technological Sciences)2009，52，8： | 10 |
| 18 | 中国人地关系评价的理论模型与实证(英文)显示文摘China’s coupled human-environment system(CHES) is assessed here via a systems schema that emphasizes the complex interactions of components and their attributes. In addition to the human and environment components, we identified two other components to evaluate the relationship. The four components are human activity intensity, resource carrying capacity, ecological constraints and system’s openness. Based on their interactions, we derived a cognitive schema for classifying the level of strain or stress of an area. The analysis draws on 11 indicators and 29 sub-indicators including remote sensing data and statistical data that are used to estimate the four components. The findings indicate that human activities are highly intense in a few geographical areas, particularly large urban systems and trade and investment zones on the eastern coastal areas. Nonetheless, these areas are also well-endowed in water resources and fertile soils although urban systems are increasingly stressed from negative pollution externalities. They are also open systems which allow them to bear a higher level of pressure and adjust accordingly. Desertification and soil erosion point to relatively fragile biophysical systems in the west and southwest, but human activities are still relatively less intense compared to their coastal counterparts. As a whole, only 14% of areas may be said to be relatively or highly strained. This however belies another one-third of areas that are currently unstable, and likely to become strained and thereby vulnerable in the near future. | 杨宇 李小云 董雯 POON PH Jessie 洪辉 何则 刘毅 | 2019 | Journal of Geographical Sciences2019，29，8： | 9 |
| 19 | 基于NSCT与区域点火PCNN的医学图像融合方法显示文摘为了进一步改善医学图像融合质量,提出一种基于NSCT(非下采样Contourlet变换)与区域点火PCNN(脉冲耦合神经网络)的医学图像融合方法。该方法在低频子带系数采用基于区域点火PCNN的融合规则,应用PCNN改进的简化模型,将低频子带系数作为信号激励PCNN网络,利用点火区域强度分析区域点火特性,根据区域点火特性确定低频子带融合系数;在选择带通方向子带系数时,充分利用非下采样Contourlet变换的方向特性,采用改进的拉普拉斯能量作为带通方向子带系数的融合规则。实验结果表明,该方法与传统融合方法相比,能够较好的保留图像的边缘和过渡区域信息,大幅度提高融合图像的质量。 | 杨艳春 王晓明 党建武 王阳萍 | 2014 | 系统仿真学报2014，26，2： | 9 |
| 20 | Unconventional Hamilton-type variational principles for nonlinear coupled thermoelastodynamics显示文摘According to the basic idea of classical yin-yang complementarity and modem dual-com plementarity, in a simple and unified new way proposed by Luo, the unconventional Hamilton-type vari ational principles for geometrically nonlinear coupled thermoelastodynamics can be established system atically. The new unconventional Hamilton-type variational principle can fully characterize the initia boundary-value problem of this dynamics. In this paper, an important integral relation is given, which can be considered as the expression of the generalized principle of virtual work for geometrically nonlin ear coupled thermodynamics. Based on this relation, it is possible not only to obtain the principle of vir tual work in geometrically nonlinear coupled thermodynamics, but also to derive systematically the complementary functionals for eight-field, six-field, four-field and two-field unconventional Hamilton type variational principles by the generalized Legendre transformations given in this paper. Further more, with this approach, the intrinsic relationship among various principles can be explained clearly. | 罗恩 黄伟江 邝君尚 罗志国 | 2002 | Science China Mathematics2002，45，6： | 9 |
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