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1The Structure of Ore-controlling Strain and Stress Fields in the Shangzhuang Gold Deposit in Shandong Province,China显示文摘Shangzhuang 改变岩石的类型金牌矿石存款位于中间的片断并且在 Jiaodong 金省的西北的部分由 Wang'ershan 差错地区控制了,中国。在 Shangzhuang 存款的变丑进化,紧张的结构和压力地和它的控制矿石的效果在这份报纸被讨论。变丑进化主要经历了四个阶段,这被揭示:早可锻的变丑,第二 NE 惹人注目水平简单砍,第三 NE 惹人注目的压缩砍和最后的 NW 惹人注目的压缩。矿化作用发生在在的第三个阶段期间最大的主要压力逐渐地从 NE 的 transited 到 NW。 3-D 压力地的数字模拟证明在最大的主要压力是NE惹人注目的条件上,在差错地区的破裂发展被赞成,当时当最大的主要压力是NW惹人注目的时,差错地区是相对 extensional 和它对形成矿石的液体的流入和炮兵阵地合适。压缩砍紧张地被类型结构在矿化作用期间描绘,积极的花结构,等等。Orebodies 等距离地主要位于 dilatational 空格,它在不可分的有压缩性的情形是分布式的。并且在差错态度变化的地方, dilatational 空格被开发或砍联合系统发展。在全面压缩砍应力地里,紧张地在多重规模忍受自我类似,包括 orebody,矿石存款和 orefield。结构的自我类似在各种各样的规模在一样的规模和破裂的类似的形状包括破裂的 subequidistant 分发。由于特殊地质的结构,然而, orebodies 主要在 Shangzhuang 存款位于挂的墙它与在 Jiaodong 金省的大多数存款不同。在存款的控制矿石的压力和紧张地的分析为寻求的沉积物提供一个重要基础。DENG Jun WANG Qingfei YANG Liqiang ZHOU Lei GONG Qingjie YUAN Wanming XU Hao GUO Chunying LIU Xiangwei 2008Acta Geologica Sinica(English Edition)2008,82,4:41
2Prediction of high-speed train induced ground vibration based on train-track-ground system model显示文摘The development of analysis on train-induced ground vibration is briefly summarized. A train-track-ground integrated dynamic model is introduced in the paper to predict the ground vibration induced by high-speed trains. Representative dynamic responses of the train-track-ground system predicted by the model are presented. Some major results measured from two field tests on the ground vibration induced by two high-speed trains are reported. Numerical prediction with the proposed train-track-ground model is validated by the high-speed train running experiments. Research results show that the wheel/rail dynamic interaction caused by track irregularities has a significant influence on the ground acceleration and little influence on the ground displacement. The main frequencies of the ground vibration induced by high-speed trains are usually below 80 Hz. Compared with the ballasted track, the ballastless track structure can produce much larger train-induced ground vibration at frequencies above 40 Hz. The vertical ground vibration is much larger than the lateral and longitudinal components.Zhai Wanming He Zhenxing Song Xiaolin 2010Earthquake Engineering and Engineering Vibration2010,9,4:24
3The uplifting and denudation of main Huangshan Mountains,Anhui Province,China显示文摘The Huangshan Mountain Geopark is an important geological landmark and tourist attraction.In this paper,we apply fission track dating to examine the uplift and exhumation processes that created the Huangshan Mountains and provide a timeline for their development.In addition to being an important scientific contribution,this information can be used on guided tours and to promote tourism.The results of eight apatite fission-track analyses suggest three age groups:56,45-30,and 15 Ma.These age groups are related to the uplifting-erosion processes involved in forming ancient multilevel denudation planes at 85-50,45-30,and 24-5 Ma,respectively.The scenic area has experienced three stages of thermal evolution.The first stage occurred before 80 Ma and the third stage after 13 Ma.The three stages had varying cooling rates:2.69,0.62,and 4.23°C/Ma,respectively.Uplifting rates also varied:0.08,0.02,and 0.12 mm/a.The uplifting ranges were also variable:1.14,1.57,and 4.00 km,respectively.Significant uplifting differences between diverse areas are obvious and there were four magnitudes of cumulative uplifting range:4060-3950,3760-3490,3190-3070,and 2650 m.The surface uplifting range varied from 450 to 2230 m.Denudation and uplifting amount averaged 2340 and 3400 m,respectively.The 1060 m difference between them is the average elevation at present.YUAN WanMing YANG ZhiQiang ZHANG ZhaoChong DENG Jun 2011Science China Earth Sciences2011,54,8:21
4Analysis of vibration reduction characteristics and applicability of steel-spring floating-slab track显示文摘A coupled dynamics computation model for metro vehicles,along with a steel-spring floating-slab track,is developed based on the theory of vehicle-track coupled dynamics.Using the developed model,the influences of the thickness,length and mass of floating-slab,spring rate and its arrangement space,running speed,etc.on the time and frequency domain characteristics of steel-spring fulcrum force are analyzed.The applicability of steel-spring floating-slab track is discussed through two integrated example cases of metro and buildings possessing distinct natural vibra-tion characteristics.It is concluded that,it is quite significant,in the optimization modular design of the parameters of steel-spring floating-slab track,to take the matching relationship of both the amplitude-frequency characteristics of steel-spring fulcrum force and natural vibration characteristics of integrated structures into comprehensive considera-tion.In this way the expensive steel-spring floating-slab track can be economically and efficiently utilized according to the site condition,and at the same time,the economic losses and bad social impact resulted from the resonance during usage of steel-spring floating-slab track can be avoided.Wanming ZHAI Peng XU Kai WEI 2011Journal of Modern Transportation2011,19,4:14
5Apatite fission track dating evidence on the tectonization of Gangdese block, south Qinghai-Tibetan Plateau显示文摘This work makes the quantitative constrain on tectonizations of the Gangdese block, south Qinghai-Tibetan Plateau. Apatite fission track (AFT) dating analyses of 15 samples collected across the Gangdese block show that the Gangdese block went through two periods of tectonizations, during -37.2-18.5 Ma and 18.5 - 8.0 Ma in the south Gangdese block, and during -47.6-5.3 Ma and 5.3-0 Ma in the middle Gangdese block. Different upliftings did not take place in the first period and rapid uplifting occurred in the late period. Meantime, there are some differences be-tween the south and middle Gangdese block. Their uplifting rate is 180 m/Ma and 70 m/Ma respectively. The rapid up-lifting time in the middle Gangdese block lagged behind the time in the south Gangdese block. It is Chala-Jiacuo-Riduo fault zone that is similar to the Yarlung Zangbo fault zone in control of the tectonization.YUAN Wanming WANG Shicheng LI Shengrong YANG Zhiqiang 2002Chinese Science Bulletin2002,47,3:13
6Progress on wheel-rail dynamic performance of railway curve negotiation显示文摘Recent advances on wheel-rail dynamic performance of curve negotiation are reviewed in this paper.There are four issues,the mechanism and calculation method of curve negotiation,the analysis and assessment of dynamic performance of vehicle,the effect of vehicle parameters on dynamic performance,and the influence of railway parameters on dynamic performance.The promising future development of wheel-rail coupled dynamics theory is analyzed in the research of curve negotiation.The framework and technique matching performance of wheel-rail dynamic interaction on the curved track are put forward for modern railways.In addition,the application of performance matching technique is introduced to the dynamic engineering,in which the wheel load is reduced obviously when the speed of train is raised to 200-250 km/h.Kaiyun Wang Chao Huang Wanming Zhai Pengfei Liu Shen Wang 2014Journal of Traffic and Transportation Engineering(English Edition)2014,1,3:13
7Geologic relationships and geochronology of the Cenozoic volcanoes and interbedded weathered mantles of Yulinshan in Qiangtang, North Tibet显示文摘The Yulinshan accumulations of volcanic rocks and interbedded weathered mantles provide a unique chance for studying the processes and environment of the formation of the planation surface in central Tibetan Plateau. Geochemical, 40Ar/39Ar and K/Ar geochronologic investigations of the weathered mantles and high-potassium volcanic rocks reveal that the volcano-weathered mantle accumulations formed under arid or semi-arid subtropic environment in 30-24 Ma. The sole planation surface of the Qiangtang region finally formed in about 20 Ma.Lin Ding Yong Zhou Jingjiang Zhang Wanming Deng 2000Chinese Science Bulletin2000,45,24:11
8Mesh stiffness evaluation of an internal spur gear pair with tooth profile shift显示文摘Tooth profile shift will change the thickness of gear teeth and a part of geometrical parameters of a gear pair, thus influencing its mesh stiffness and consequently the dynamic performances. In this paper, an analytical mesh stiffness calculation model for an internal gear pair in mesh considering the tooth profile shift is developed based on the potential energy principle. Geometrical representations of the tooth profile shift are firstly derived, and then fitted into the analytical tooth stiffness model of gears. This model could supply a convenient way for mesh stiffness calculation of profile shifted spur gears. Then, simulation studies are conducted based on the developed model to demonstrate the effects of tooth profile shift coefficient on the tooth compliances and the mesh stiffness of the internal spur gear pair. The results show that tooth profile shift has an obvious influence on the mean value, amplitude variation and phase of the mesh stiffness, from which it can be predicted that the dynamic response of an internal gear transmission system will be affected by the tooth profile shift.CHEN ZaiGang ZHAI WanMing SHAO YiMin WANG KaiYun 2016Science China(Technological Sciences)2016,59,9:11
9钢纤维混凝土(SFRC)及其应用研究显示文摘文中论述了钢纤维砼(Steelfiberreinferedconcrete)基本力学性能的研究试验及其应用研究———城市道路窨井盖的试制开发,结果表明:SFRC的抗压、抗劈拉及抗折强度分别为素砼的118、215和15倍,用其制作的窨井盖初裂荷载可达50~80KN,完全能满足国家公路路面设计规范的要求.Song Wanming Dong Bing 1998昆明理工大学学报(理工版)1998,23,1:9
10Proteomics-based analysis of differentially expressed proteins in the CXCRl-knockdown gastric carcinoma MKN45 cell line and its parental cell显示文摘C-X-C chemokine 受体打 1 (CXCR1 ) ,房间表面 G-protein-coupled 受体被发现了与一些肿瘤的 tumorigenesis,开发,和前进被联系。以前,我们发现了 CXCR1 overexpression 与迟了阶段的胃的腺癌被联系。我们也表明了那 CXCR1 击倒能在 vitro 并且在 vivo 禁止房间增长。在这研究,我们比较了在房间线和 CXCR1 击倒的 MKN45 房间由 2D 电气泳动衬里的胃的癌 MKN45 之间的蛋白质表示侧面的变化。在 101 之中确定的蛋白质, 29 个点是显著地不同的,在哪个之中 13 是下面调整的, 16 在 CXCR1 以后是起来调整的击倒。这些蛋白质被集体 spectrometry 分析进一步识别。在他们之中,几起来调整的蛋白质象 hCG2020155, Keratin8,异构的原子 ribonucleoprotein C (C1/C2 ) ,和象 Sorcin 那样的几下面调整的蛋白质那样,热吃惊蛋白质 27, serpin B6 isoform b,和异构的原子 ribonucleoprotein K 被证实。这些蛋白质与房间周期有关,抄写规定,房间坚持,细胞的新陈代谢,药抵抗等等。这些结果提供另外的支持给 CXCR1 可能玩的假设在增长,侵略,转移,和预后的一个重要角色,和胃的癌的药抵抗。Wanming Hu JunpuWang Gengqiu Luo Baihua Luo Chang Wu Weiyuan Wang Yan Xiao Jinghe Li 2013Acta Biochimica et Biophysica Sinica2013,45,10:8
11Train–track coupled dynamics analysis:system spatial variation on geometry,physics and mechanics显示文摘This paper aims to clarify the influence of system spatial variability on train–track interaction from perspectives of stochastic analysis and statistics.Considering the spatial randomness of system properties in geometry,physics and mechanics,the primary work is therefore simulating the uncertainties realistically,representatively and efficiently.With regard to the track irregularity simulation,a model is newly developed to obtain random sample sets of track irregularities by transforming its power spectral density function into the equivalent track quality index for representation based on the discrete Parseval theorem,where the correlation between various types of track irregularities is accounted for.To statistically clarify the uncertainty of track properties in physics and mechanics in space,a model combining discrete element method and finite element method is developed to obtain the spatially varied track parametric characteristics,e.g.track stiffness and density,through which the highly expensive experiments in situ can be avoided.Finally a train–track stochastic analysis model is formulated by integrating the system uncertainties into the dynamics model.Numerical examples have validated the accuracy and efficiency of this model and illustrated the effects of system spatial variability on train–track vibrations comprehensively.Lei Xu Wanming Zhai 2020Railway Engineering Science2020,28,1:8
12Impact vibration behavior of railway vehicles:a state-of-the-art overview显示文摘Excessive vibrations of railway vehicles induced by dynamic impact loadings have a significant impact on train operating safety and stability;however,due to the complexity and diversity of railway lines and service environment,they are extremely difficult to eliminate.A comprehensive overview of recent studies on the impact vibration behavior of railway vehicles was given in this paper.First,the sources of impact excitations were categorized in terms of wheel-rail contact irregularity,aerodynamic loads,and longitudinal impulses by train traction/braking.Then the main research approaches of vehicle impact vibration were briefly introduced in theoretical,experimental,and simulation aspects.Also,the impact vibration response characteristics of railway vehicles were categorized and examined in detail to various impact excitation sources.Finally,some attempts of using the railway vehicle vibration to detect track defects and the possible mitigation measures were outlined.Lin Jing Kaiyun Wang Wanming Zhai 2021Acta Mechanica Sinica2021,37,8:7
13K-Ar age of the Cenozoic volcanic rocks in the Nangqen Basin, Qinghai Province and its geological significance显示文摘The Nangqen Basin is one of the typical shearing-extensional basins situated in the north part of the Hengduan Mts. Nine ages of the Cenozoic volcanic rocks from the basin by K-Ar isotope-dilution technique have been reported in the note. The apparent ages of whole rock and separated biotite range from 32.04 to 36.50 Ma. The 40Ar-K (%) correlation isochronal line shows that there existed neither argon excessing , nor radiogenetic argon loosing, i.e. the age represents the true diagenetic time. Volcanic activity in this area occurred in the post-collision environment and is controlled by lithosphere substantial thickening and violent intercontinental shearing-strike slip faults. There is age difference of the magmatic activity in the east, the west and the north Tibet. The multi-periodic eruption-intrusion of the magmatic melt since Cenozoic is a tracer showing the pulsating uplift of the Tibetan Plateau.DENG Wanming SUN Hongjuan ZHANG Yuquan 2000Chinese Science Bulletin2000,45,11:7
14Effect of Solidification Condition on Microstructure and Mechanical Properties of Single Crystal Superalloy显示文摘CMSX-2 single crystals with different primary dendrite arm spacing were obtained on directional solidification apparatus with high temperature gradient (250 K/cm). The microstructure and elevated temperature stress rupture properties of these single crystals were examined and analyzed.Wanming ZHANG Wei DU and Hengzhi FU State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China 2001Journal of Materials Science & Technology2001,17,1:6
15Intelligent Reflecting Surfaces Enabled Cognitive Internet of Things Based on Practical Pathloss Model显示文摘In this paper,we aim to unlock the potential of intelligent reflecting surfaces(IRSs)in cognitive internet of things(loT).Considering that the secondary IoT devices send messages to the secondary access point(SAP)by sharing the spectrum with the primary network,the interference is introduced by the IoT devices to the primary access point(PAP)which profits from the IoT devices by pricing the interference power charged by them.A practical path loss model is adopted such that the IRSs deployed between the IoT devices and SAP serve as diffuse scatterers,but each reflected signal can be aligned with its own desired direction.Moreover,two transmission policies of the secondary network are investigated without/with a successive interference cancellation(SIC)technique.The signal-to-interference plus noise ratio(SINR)balancing is considered to overcome the nearfar effect of the IoT devices so as to allocate the resource fairly among them.We propose a Stackelberg game strategy to characterize the interaction between primary and secondary networks.For the proposed game,the Stackelberg equilibrium is analytically derived to optimally obtain the closed-form solution of the power allocation and interference pricing.Numerical results are demonstrated to validate the performance of the theoretical derivations.Zheng Chu Pei Xiao De Mi Hongzhi Chen Wanming Hao 2020China Communications2020,17,12:4
16Discrete element modelling of railway ballast performance considering particle shape and rolling resistance显示文摘To simulate ballast performance accurately and efficiently,the input in discrete element models should be carefully selected,including the contact model and applied particle shape.To study the effects of the contact model and applied particle shape on the ballast performance(shear strength and deformation),the direct shear test(DST)model and the large-scale process simulation test(LPST)model were developed on the basis of two types of contact models,namely the rolling resistance linear(RRL)model and the linear contact(LC)model.Particle shapes are differentiated by clumps.A clump is a sphere assembly for one ballast particle.The results show that compared with the typical LC model,the RRL method is more efficient and realistic to predict shear strength results of ballast assemblies in DSTs.In addition,the RRL contact model can also provide accurate vertical and lateral ballast deformation under the cyclic loading in LPSTs.Yunlong Guo Chunfa Zhao Valeri Markine Can Shi Guoqing Jing Wanming Zhai 2020Railway Engineering Science2020,28,4:4
17ANALYSIS OF THERMAL-ELASTIC STRESS OF WHEEL-RAIL IN ROLLING-SLIDING CONTACT显示文摘A coupling thermo-mechanical model of wheel/rail in rolling-sliding contact is put forward using finite element method. The normal contact pressure is idealized as the Hertzian distribution, and the tangential force presented by Carter is used. In order to obtain thermal-elastic stress, the ther-mal-elastic plane stress problem is transformed to an elastic plane stress problem with equivalent fictitious thermal body force and fictitious boundary distributed force. The temperature rise and ther-mal-elastic stress of wheel and rail in rolling-sliding are analyzed. The non-steady state heat transfer between the contact surfaces of wheel and rail, heat-convection and radiation between the wheel/rail and the ambient are taken into consideration. The influences of the wheel rolling speed and wear rate on friction temperature and thermal-elastic stress are investigated. The results show the following: ① For rolling-sliding case, the thermal stress in the thin layer near the contact patch due to the friction temperature rise is severe. The higher rolling speed leads to the lower friction temperature rise and thermal stress in the wheel; ② For sliding case, the friction temperature and thermal stress of the wheel rise quickly in the initial sliding stage, and then get into a steady state gradually. The expansion of the contact patch, due to material wear, can affect the friction temperature rise and the thermal stress during wear process. The higher wear rate generates lower stress. The results can help under-stand the influence of friction temperature and thermal-elastic stress on wheel and rail damage.ZHAO Xin JIN Xuesong ZHAI Wanming 2007Chinese Journal of Mechanical Engineering2007,20,3:4
18Petrogenesis of Cenozoic Potassic Volcanic Rocks in the Nangqen Basin显示文摘The Nangqên basin is one of the Tertiary pull-apart basins situated in the east of the Qiangtang block. Similar to the adjacent Dengqên basin and Baxoi basin, there occurred a series of potassic volcanic and sub-volcanic rocks, ranging from basic, intermediate to intermediate-acid in lithology. Based on the study of petrology, mineralogy and geochemistry, including REEs, trace elements, isotopic elements and chronology, the authors concluded that the Cenozoic potassic volcanic rocks in the Nangqên basin were formed in the post-collisional intraplate tectonic settings. The relations between the basic, intermediate and intermediate-acid rocks are neither differentiation nor evolution, but instead the geochemical variability is mainly attributable to the different partial melting degrees of the mantle sources formed at depths of 50(80 km.The sources of the potassic rocks are enriched metasomatic mantle that has experienced multiple mixing of components mainly derived from the crust. The recycling model can be described as follows: after they had subducted to the mantle wedge, the crust-derived rocks were metasomatized with the mantle materials. In view of the fact that the ratio of crust-derived rocks increases by the age of volcanism, it can be concluded that the sources of the potassic rocks moved upwards progressively with time.The underplating of small scattered magmas upwelling from the asthenosphere may have induced partial melting of the sources of the volcanic rocks in some pull-apart basins in the Hengduanshan area and the intense tectonic movements of large-scale strike-slip belts provided conduits for the ascending melts.SUN Hongjuan DENG Wanming ZHANG Yuquan 2001Acta Geologica Sinica(English Edition)2001,75,1:4
19Exhumation history of the Huangshan granite pluton,southern Anhui Province:New insights from fission-track analysis显示文摘The dating of the uplift onset of the Huangshan pluton in the southern part of Anhui Province associated with the collision between paleo-Pacific Block and the Eurasian Block is a fundamental issue to better understand the uplift mechanisms and the regional tectonic evolution.χ2 values of seven zircon fission track(ZFT) samples collected from the south part of the Huangshan pluton were all<5%.Based on the grain ages of four typical ZFT samples,three thermal overprints ranging in 113-123,72-95 and 49-66 Ma were distinguished respectively using the binomial peak-fitting method in accordance with the tectonic thermal events after south China shifted into circum-Pacific tectonic region.Apatite fission track(AFT) study of the Huangshan pluton shows ages lie between 15±3 and 56±6 Ma with allχ2 values>5%,and all are significantly younger than their host rock formation ages,indicating that the samples have experienced post-formation thermal history.Based on the AFT results and topography characteristics in the Huangshan pluton,three zones with different denudation intensities caused by the differential uplift of the fault blocks were recognized in this paper,indicating that denudation was driven by the increase in elevation significantly.Modeling of the AFT data shows that the earlier cooling phase took place in the early Cenozoic and involved 3.3,3.8 and 6.0°C/Ma of cooling rates equivalent to the exhumation rates of 90,104 and 167 m/Ma in different fault blocks.The last phase of cooling took place from~10 Ma with average cooling rate of~5.6°C/Ma,equivalent to average denudation rates of~156 m/Ma.The fission track results imply that the regional compression field plays an important role for the differential exhumation between individual fault blocks of the Huangshan pluton.ZHENG Yong YU XinQi YUAN WanMing WANG De'En JIANG GongBing ZHU DeLai WANG Cheng JIA YingYing 2011Science China Earth Sciences2011,54,4:3
20Cotransplantation of haploidentical hematopoietic and umbilical cord mesenchymal stem cells for severe aplastic anemia: Successful engraftment and mild GVHD显示文摘Yamei Wu Yongbin Cao Xiaohong Li Lixin Xu Zhihong Wang Pei Liu Pei Yan Zhouyang Liu Jing Wang Shuang Jiang Xiaoxiong Wu Chunji Gao Wanming Da Zhongchao Han 2014Stem Cell Research2014,,1:3
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