|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | LARGE-SCALE STRIKE SLIP FAULT: THE MAJOR STRUCTURE OF INTRACONTINENTAL DEFORMATION AFTER COLLISION显示文摘Intracontinental deformation is one of the most interesting problems in tectonics. But so far little attention has been paid to rock deformation, metamorphism and magmatism related with large-scale displacement and rotation of these blocks. In this note, we take the Ailaoshan-Red River fault (ARF)zone in western Yunnan as an example and discuss the kinematics and dynamics of the fault With its neighbouring blocks in the Tertiary. | 钟大赉 P. TAPPONNIER 吴海威 张连生 嵇少丞 钟嘉猷 刘小汉 U. SCHAERER R. LACASSIU P. LELOUP | 1990 | Chinese Science Bulletin1990，35，4： | 23 |
| 2 | Contemporary crustal tectonic movement in the southern Sichuan-Yunnan block based on dense GPS observation data显示文摘We analyzed 360 permanent and campaign GPS data from 1999 to 2017 in the southern Sichuan-Yunan block, and obtained crustal horizontal deformation in this region.Then, we derived the strain rate using a multi-scale spherical wavelet method.Results reveal a complex pattern of tectonic movement in the southern Sichuan-Yunnan block.Compared to the stable Eurasian plate, the maximum rate of the horizontal deformation in the southern Sichuan-Yunnan block is approximately 22 mm/a.The Xiaojiang fault shows a significantly lower deformation—a left-lateral strike-slip movement of 9.5 mm/a.The Honghe fault clearly shows a complex segmental deformation from the north to south.The northern Honghe fault shows 4.3 mm/a right strike-slip with 6.7 mm/a extension; the southern Honghe fault shows 1.9 mm/a right strike-slip with 1.9 mm/a extension; the junction zone in the Honghe and Lijiang–Xiaojinhe faults shows an obvious clockwise-rotation deformation.The strain calculation results reveal that the maximum shear-strain rate in this region reaches 70 nstrain/a, concentrated around the Xiaojiang fault and at the junction of the Honghe and Lijiang–Xiaojinhe faults.We note that most of the earthquakes with magnitudes of 4 and above that occurred in this region were within the high shear strain-rate zones and the strain rate gradient boundary zone, which indicates that the magnitude of strain accumulation is closely related to the seismic activities.Comparison of the fast shear-wave polarization direction of the upper-crust with the upper-mantle anisotropy and the direction of the surface principal compressive strain rate obtained from the inversion of the GPS data reveals that the direction of the surface principal compressive strain is basically consistent with the fast shear-wave polarization direction of the upper crust anisotropy, but different from the polarization direction of the upper mantle.Our results support the hypothesis that the principal elements of the deformation mechanism in the southern Sichuan-Yunnan block are decoupling between the upper and lower crust and ductile flow in the lower crust. | HongLin Jin Yuan Gao XiaoNing Su GuangYu Fu | 2019 | Earth and Planetary Physics2019，3，1： | 18 |
| 3 | 反无人机技术与产品发展现状显示文摘2016年2月,美国知名市场预测公司Markets&Markets发布最新研究报告指出,预计从2017年到2022年,全球反无人机市场规模,将以23.89%的年复合增长率发展,到2023年将达到11亿4千万美元。分析认为,亚太地区将是反无人机系统需求增长最快的地区(占全球市场的30%),而反无人机的产品市场将长期处于供不应求的状态。美国波音公司的反无人机激光武器Silent Strike。 | 郭珊珊 | 2016 | 军事文摘2016，0，19： | 16 |
| 4 | The unconformity in Miocene sequence of western Qaidam Basin and its tectonic significance显示文摘An angular unconformity has been identified between the upper and the lower Youshashan Formation based on the study of the regional geology, drillhole, and geophysical data of the Altyn Tagh Mountain foreland, western Qaidam Basin. The distribution of the unconformity, the contacts between the upper and the lower Youshashan Formation, and its relation to the characteristics of the paleo-structure belts suggest a close relationship between the unconformities in the southern flank of the Altyn Tagh Mountain in the west of the Qaidam Basin and the activity of the Altyn Tagh Fault. It was the same time when the Atlyn Tagh Fault Zone was transformed from regional uplifting to rapid-strike-slipping movement during the Miocene, resulting in the cessation of the regional uplift and subsequent massive regional transgression during the deposition of the upper Youshashan Formation, which unconformably overlies (onlaps) the underlying strata of different ages. | WANG Liang XIAO AnCheng GONG QingLin LIU Dong WU Lei ZHOU SuPing SHEN ZhongYan LOU QianQian SUN XiaoWen | 2010 | Science China Earth Sciences2010，53，8： | 10 |
| 5 | The Cenozoic activities of Yangjiang-Yitongdong Fault: insights from analysis of the tectonic characteristics and evolution processes in western Zhujiang(Pearl) River Mouth Basin显示文摘The Yangjiang-Yitongdong Fault (YJF) is an important NW-trending regional fault, which divides the Zhujiang (Pearl) River Mouth Basin (ZRMB) into western and eastern segments. In Cenozoic, the northern continental margin of the South China Sea (SCS) underwent continental rifting, breakup, seafloor spreading and thermal subsidence processes, and the Cenozoic activities of YJF is one part of this series of complex processes. Two long NW-trending multichannel seismic profiles located on both sides of the YJF extending from the continental shelf to Continent-Ocean Boundary (COB) were used to study the tectonic and sedimentary characteristics of western ZRMB. Using the 2D-Move software and back-stripping method, we constructed the balance cross-section model and calculated the fault activity rate. Through the comprehensive consideration of tectonic position, tectonic evolution history, featured structure, and stress analysis, we deduced the activity history of the YJF in Cenozoic. The results showed that the YJF can be divided into two segments by the central uplift belt. From 65 Ma to 32 Ma, the YJF was in sinistral motion as a whole, inherited the preexisting sinistral motion of Mesozoic YJF, in which, the southern part of YJF was mainly in extension activity, controlling the formation and evolution of Yunkai Low Uplift, coupled with slight sinistral motion. From 32 Ma to 23.8 Ma, the sinistral motion in northern part of YJF continued, while the sinistral motion in southern part began to stop or shifted to a slightly dextral motion. After 23.8 Ma, the dextral motion in southern part of YJF continued, while the sinistral motion in northern part of YJF gradually stopped, or shifted to the slightly dextral motion. The shift of the YJF strike-slip direction may be related to the magmatic underplating in continent-ocean transition, southeastern ZRMB. According to the analysis of tectonic activity intensity and rift sedimentary structure, the activities of YJF in Cenozoic played a regulating role in the rift extension process of ZRMB. | Yuhan Li Rongwei Zhu Hailing Liu Xuelin Qiu Haibo Huang | 2019 | Acta Oceanologica Sinica2019，38，9： | 10 |
| 6 | Mass and performance optimization of an airplane wing leading edge structure against bird strike using Taguchi-based grey relational analysis显示文摘Collisions between birds and aircraft are one of the most dangerous threats to flight safety. In this study, smoothed particles hydrodynamics(SPH) method is used for simulating the bird strike to an airplane wing leading edge structure. In order to verify the model, first, experiment of bird strike to a flat aluminum plate is simulated, and then bird impact on an airplane wing leading edge structure is investigated. After that, considering dimensions of wing internal structural components like ribs, skin and spar as design variables, we try to minimize structural mass and wing skin deformation simultaneously. To do this, bird strike simulations to 18 different wing structures are made based on Taguchi's L18 factorial design of experiment. Then grey relational analysis is used to minimize structural mass and wing skin deformation due to the bird strike. The analysis of variance(ANOVA) is also applied and it is concluded that the most significant parameter for the performance of wing structure against impact is the skin thickness. Finally, a validation simulation is conducted under the optimal condition to show the improvement of performance of the wing structure. | Hassan Pahange Mohammad Hossein Abolbashari | 2016 | Chinese Journal of Aeronautics2016，29，4： | 6 |
| 7 | DISCUSSION ON RELATION BETWEEN BOUNDARY LAYER AND WALL EROSION CAUSED BY STRIKING OF PARTICLES显示文摘The kinetic characteristics of particles moving through laminar or turbulent boundary layer are computed anddifferent erosive situations caused by striking of particles are compared. The function of anti-erosion sinews addedon the blades is analysed. The energy detrition in the two-phase turbulent flow is discussed. The content is helpfulto the design of anti-erosion fans. | Lin, Jian-zhong Shen, Tian-yao | 1991 | Journal of Hydrodynamics1991，3，1： | 5 |
| 8 | Studies on the Surface Rupture Zone of 1303 Hongdong Earthquake of M =8 and Paleoearthquakes of Huoshan Fault in Shanxi Province显示文摘An earthquake of M=8 occurred in the Linfen Basin of the Shanxi graben system in 1303,producing a surface rupture zone about 45km long.Compiling a geological map at 1:10,000 and studying in detail the rupture zone,its dextral strike-slip displacement is determined to be 4-8.6 m,and normal dip-slip displacement up to 3.5-5 m.In this paper the geochronological evidence for the formation of the surface rupture zone is provided and the Huoshan fault is confirmed to be the seismogenic structure for the M=8 earthquake.Field trenching enables us to identify two paleoseismic events having occurred along the Huoshan fault since the middle Holocene before the M8 earthquake.A recurrence interval of these three events including 1303 Hongdong M 8 earthquake is determined to be up to 1500-2000 years.The result corresponds to the mean recurrence interval calculated from slip rate on the Huoshan fault during Holocene. | Deng Qidong and Xu XiweiInstitute of Geology,SSB,Beijing 100029,China | 1994 | Earthquake Research in China1994，8，2： | 4 |
| 9 | 汉语“打”字的英译法探索点滴显示文摘尽管汉英两种语言属于不同语系的不同语族,但对英语学习者来说,常常会按照汉语的语言习惯去翻译英语。汉语中一个由“打”字组成的词组,在翻译时则需用数十个英语动词来表达,才能基本译出其含义。这就要求我们英语学习者不但要精通汉英两种语言,在翻译时更要确切地理解原文,做到准确无误地将一种语言用另一种语言表达出来。 | 李景霞 | 1998 | 赤峰学院学报(哲学社会科学版)1998，22，5： | 2 |
| 10 | Rotational motions of the Ms7.0 Jiuzhaigou earthquake with ground tilt data显示文摘Observation and research of rotational motions induced by earthquake has been ignored in the past decades due to the lack of understanding of important ground rotational motions and practical difficulty involved in directly measuring the rotational components. Currently, there is a paucity of methods to directly measure rotational motions in China. The present study attempts to discuss the possibility of obtaining seismic rotation from ground tilt data. The rotational motions generated by shear dislocation source are derived based on the displacement formula of elastic wavefields in the homogenous space. The characteristics of the three components of translational and rotational motions in near, intermediate, and far fields are compared and analyzed. Based on the corresponding relationship between the rotation and ground tilt on free surface boundary, a method to indirectly construct the rotational motions in the layered half space is obtained. Finally, the theoretical rotational motions generated by the Ms7.0 earthquake in Jiuzhaigou, Sichuan Province, on August 8, 2017 are calculated. The results indicate that the rotational motions generated by the Jiuzhaigou earthquake are concentrated in the vicinity of the epicenter(approximately150 km) and mainly distributed in the area perpendicular to the fault strike. The existence of free surface boundary attenuates the total energy of the rotational field and especially in the direction of the dominant energy. The ground tilt data is compared with rotational motions in the layered half space, and the results indicate that theoretical rotations and actual ground tilt data are essentially consistent, especially in the far field region. Thus, it is possible to obtain horizontal components of rotation from ground tilt data, and this provides more information for a complete description of the motion characteristics of an underground medium. | Cong ZHOU Xiangzhi ZENG Qingliang WANG Wenyi LIU Cuizhi WANG | 2019 | Science China Earth Sciences2019，62，5： | 2 |
| 11 | WORLD NEWS IN BRIEF (August 1-15, 1987)显示文摘A statement issued by SdudiArabia on August 1 said thatmore than 400 people, including275 Iranian pilgrims, werekilled in clashes started byIranian demonstrators outsideMeccd’s grand mosque on July 31. US Congressional investigatorsended their three-month publichearings on the | | 1987 | 国际展望1987，，16： | 1 |
| 12 | Seismogenic Structure of the 1411 Southern Damxung (Damdoi) Earthquake with M=8 in Tibet显示文摘The seismogenic structure of the 1411 southern Damxung(Damdoi)earthquake with M=8 in Tibet is discussed in detail in this paper.It is pointed out that the Nyainqentanglha southern pediment fault is the seismogenic one of the 1411 southern Damxung(Damdoi)earthquake with M=8,and the macroepicenter is located at the intersection of the extensional shear fault within Nasego-Garbogo pull-apart basin and the secondary strike-slipping fault with larger amplitude of neotectonic activity at the southwestern side of the basin.Besides,there is obvious anomaly of the geophysical fields in the seismic area,indicating that occurrence of 1411 southern Damxung(Damdoi)earthquake with M=8 was not only controlled by the superstructure but also the background of deep-seated structure. | Wu Zhangnung,Cao Zhongquan,Shentu Bingming and Deng QidongInsntute of Geology,SSB,Beijing 100029,China | 1994 | Earthquake Research in China1994，8，1： | 1 |
| 13 | The Epi-continental arc of Southeast China and relevant earthquakes显示文摘TheEpi┐continentalarcofSoutheastChinaandrelevantearthquakesJIA-WEIXU(徐嘉炜)DepartmentofResourceandEnvironmentalSciences,HefeiU... | 徐嘉炜 | 1996 | Acta Seismologica Sinica(English Edition)1996，9，4： | 1 |
| 14 | The characteristics of tectonic stress field about strike slip earthquake-generating structure in the Chinese mainland显示文摘(环文林,汪素云,宋昭仪)Thecharacteristicsoftectonicstressfieldaboutstrikeslipearthquake-generatingstructureintheChinesemainland￥Wen-Lin... | 环文林 汪素云 宋昭仪 | 1994 | Acta Seismologica Sinica(English Edition)1994，7，4： | 1 |
| 15 | Balance control during gait initiation: State-of-the-art and research perspectives显示文摘It is well known that balance control is affected by aging, neurological and orthopedic conditions. Poor balance control during gait and postural maintenance are associated with disability, falls and increased mortality. Gait initiation-the transient period between the quiet standing posture and steady state walking-is a functional task that is classically used in the literature to investigate how the central nervous system(CNS) controls balance during a whole-body movement involving change in the base of support dimensions and center of mass progression. Understanding how the CNS in able-bodied subjects exerts this control during such a challenging task is a prerequisite to identifying motor disorders in populations with specific impairments of the postural system. It may also provide clinicians with objective measures to assess the efficiency of rehabilitation programs and better target interventions according to individual impairments. The present review thus proposes a state-of-the-art analysis on:(1) the balance control mechanisms in play during gait initiation in able bodied subjects and in the case of some frail populations; and(2) the biomechanical parameters used in the literature to quantify dynamic stability during gait initiation. Balance control mechanisms reviewed in this article included anticipatory postural adjustments, stance leg stiffness, foot placement, lateral ankle strategy, swing foot strike pattern and vertical center of mass braking. Based on this review, the following viewpoints were put forward:(1) dynamic stability during gait initiation may share a principle of homeostatic regulation similar to most physiological variables, where separate mechanisms need to be coordinated to ensure stabilization of vital variables, and consequently; and(2) rehabilitation interventions which focus on separate or isolated components of posture, balance, or gait may limit the effectiveness of current clinical practices. | Eric Yiou Teddy Caderby Arnaud Delafontaine Paul Fourcade Jean-Louis Honeine | 2017 | World Journal of Orthopedics2017，8，11： | 1 |
| 16 | Transition to forefoot strike reduces load rates more effectively than altered cadence显示文摘Background: Excessive vertical impacts at landing are associated with common running injuries. Two primary gait-retraining interventions aimed at reducing impact forces are transition to forefoot strike and increasing cadence. The objective of this study was to compare the shortand long-term effects of 2 gait-retraining interventions aimed at reducing landing impacts.Methods: A total of 39 healthy recreational runners using a rearfoot strike and a cadence of 170 steps/min were randomized into cadence(CAD) or forefoot strike(FFS) groups. All participants performed 4 weeks of strengthening followed by 8 sessions of gait-retraining using auditory feedback. Vertical average load rates(VALR) and vertical instantaneous load rates(VILR) were calculated from the vertical ground reaction force curve. Both cadence and foot strike angle were measured using 3D motion analysis and an instrumented treadmill at baseline and at 1 week,1 month, and 6 months post retraining.Results: ANOVA revealed that the FFS group had significant reductions in VALR(49.7%) and VILR(41.7%), and changes were maintained long term. Foot strike angle in the FFS group changed from 14.2° dorsiflexion at baseline to 3.4° plantarflexion, with changes maintained long term. The CAD group exhibited significant reduction only in VALR(16%) and only at 6 months. Both groups had significant and similar increases in cadence at all follow-ups(CAD, +7.2% to 173 steps/min;and FFS, +6.1% to 172 steps/min).Conclusion: Forefoot strike gait-retraining resulted in significantly greater reductions in VALR and similar increases in cadence compared to cadence gait-retraining in the short and long term. Cadence gait-retraining resulted in small reductions in VALR at only the 6-month follow-up. | Erin E.Futrell K.Douglas Gross Darcy Reisman David R.Mullineaux Irene S.Davis | 2020 | Journal of Sport and Health Science2020，9，3： | 1 |
| 17 | 辅音连缀显示文摘一、辅音连缀的概念一个音节内两个或两个以上连续出现的非成节辅音叫做辅音连缀(consonant cluster)。英语音节中的起音与收音既可以是单个的辅音,又可以是一个辅音连缀,如strike/straik/,next/nekst/,汉语普通话音节中的起音与收音却只能是单个的辅音,如“海” | 史延恺 | 1987 | 语言教育1987，0，3： | 1 |
| 18 | Plasma discharge characteristics of segmented diverter strips subject to lightning strike显示文摘In order to research segmented diverters for aircraft lightning protection, a transient 2 D multiphysics model based on magnetohydrodynamics theory is proposed to predict the location of the arc plasma discharge and lightning channel, and to simulate the electrothermal behavior.Based on numerical calculation and preliminary analysis, factors that affect the breakdown voltage of the segmented diverter are discussed. The results show that the voltage increase rate of the voltage source, the width of the air gap between metal segments and the geometry of these segments influence the breakdown voltage of the strip. High-voltage tests of the segmented diverter are performed to reveal air breakdown of the strip and redirect the lightning current.Experimental and numerical results are compared to verify the correctness of the numerical model. The ionization of the air gap between metal segments and the breakdown voltage of the strip calculated by the model are qualitatively consistent with experimental results. The breakdown voltage of the segmented diverter is far lower than the lightning voltage. When a lightning strike occurs, the segmented diverter can be quickly ionized to form a plasma channel which can guide the lightning current well. | 陈汉 王富生 熊秀 何征 岳珠峰 | 2019 | Plasma Science and Technology2019，21，2： | 1 |
| 19 | 运动解剖学显示文摘G804.4 9402288足跟模拟撞击时穿鞋足跟部的变形特征:不同中部鞋底硬度的影响=Dcformantion characteristics of the heelregion ofthe shod foot during a simulated heel strike:theeffect of varying midsolchardness[刊,英]/Aerts P,Cleuq D//J Sports Sci.—1993,11(5).—449—461图12表3参14(MYL) | | 1994 | 体育科技文献通报1994，4，7： | 1 |
| 20 | 全球移动游戏设备超10亿台 安卓份额占七成显示文摘现在,全球用于玩游戏的智能手机和平板电脑的数量已经超过了10亿台。这也是这些用于玩游戏的移动设备首次达到这个数量级。而谷歌的移动操作系统仍然是从游戏设备的数量增长之中获益最多的。根据App Annie与国际数据咨询公司(IDC)等信息咨询公司发布的报告,在以智能设备为主导的移动游戏市场上,安卓操作系统所占的份额接近75个百分点。 | 万全良 | 2015 | 计算机与网络2015，41，5： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员