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141篇 您的检索式:作者名="WANG ZhenFeng"
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1Analyses on the tectonic thermal evolution and influence factors in the deep-water Qiongdongnan Basin显示文摘To reveal the tectonic thermal evolution and influence factors on the present heat flow distribution, based on 154 heat flow data, the present heat flow distribution features of the main tectonic units are first analyzed in detail, then the tectonic thermal evolution histories of 20 profiles are reestablished crossing the main deep-water sags with a structural, thermal and sedimentary coupled numerical model. On the basis of the present geothermal features, the Qiongdongnan Basin could be divided into three regions: the northern shelf and upper slope region with a heat flow of 50–70 m W/m2, most of the central depression zone of 70–85 m W/m2, and a NE trending high heat flow zone of 85–105 m W/m2 lying in the eastern basin. Numerical modeling shows that during the syn-rift phase, the heat flow increases generally with time, and is higher in basement high area than in its adjacent sags. At the end of the syn-rift phase, the heat flow in the deepwater sags was in a range of 60–85 m W/m2, while in the basement high area, it was in a range of 75–100 m W/m2. During the post-rift phase, the heat flow decreased gradually, and tended to be more uniform in the basement highs and sags. However, an extensive magmatism, which equivalently happened at around 5 Ma, has greatly increased the heat flow values, and the relict heat still contributes about 10–25 m W/m2 to the present surface heat flow in the central depression zone and the southern uplift zone. Further analyses suggested that the present high heat flow in the deep-water Qiongdongnan Basin is a combined result of the thermal anomaly in the upper mantle, highly thinning of the lithosphere, and the recent extensive magmatism. Other secondary factors might have affected the heat flow distribution features in some local regions. These factors include basement and seafloor topography, sediment heat generation, thermal blanketing, local magmatic injecting and hydrothermal activities related to faulting and overpressure.WANG Zhenfeng SHI Xiaobin YANG Jun HUANG Baojia SUN Zhen WANG Yahui JIANG Haiyan YU Chuanhai YANG Xiaoqiu 2014Acta Oceanologica Sinica2014,33,12:22
2Controlling factors on the submarine canyon system: A case study of the Central Canyon System in the Qiongdongnan Basin, northern South China Sea显示文摘Based on an integrated analysis of high-resolution 2D/3D seismic data and drilling results, this study analyzes the tectonicsedimentary evolution of the Qiongdongnan Basin(QDNB) since the late Miocene, and discusses the controlling factors on the formation and development of the Central Canyon System(CCS). The sediment failures caused by the relative sea level falling might have discharged deposits from the slope to the canyon. The two suits of the infillings, i.e., turbidites and mass transport complex(MTC), were derived from the northwestern source and northern source, respectively. The sediment supplies, which differ significantly among different areas, might have led to the variations observed in the internal architectures. Tectonic transformation around 11.6 Ma had provided the tectonic setting for the CCS and formed an axial sub-basin in the central part of the Changchang Depression, which could be called the rudiment of the CCS. The tectonic activity of the Red River Fault(RRF) at about 5.7 Ma might have strengthened the hydrodynamics of the deposits at the junction of the Yinggehai Basin(YGHB) and the QDNB to trigger a high-energy turbidity current. The MTC from the northern continental slope system might have been constrained by the Southern Uplift, functioning as a barrier for the infillings of the CCS. Thanks to a sufficient sediment supply during the Holocene period and the paleo-seafloor morphology, the relief of modern central canyon with the starving landform in the eastern Changchang Depression might have been accentuated by deposition of sediments and vertical growth along the canyon flanks, where collapse deposits were widely developed. Corresponding to the segmentation of the CCS, the forming mechanisms of the canyon between the three segments would be different. The turbidite channel in the head area had likely been triggered by the abundant sediment supply from the northwestern source together with the fault activity at about 5.7 Ma of the RRF. The formation and evolution of the canyon in the western segment were caused by combined effects of the turbidite channel from the northwestern source, the MTC from the northern continental slope, and the paleo-seafloor geomorphology. In the eastern segment, the canyon was constrained by the tectonic transformation occurring at approximately 11.6 Ma and the insufficient sediment supply from the wide-gentle slope.SU Ming ZHANG Cheng XIE XiNong WANG ZhenFeng JIANG Tao HE YunLong ZHANG CuiMei 2014Science China Earth Sciences2014,57,10:21
3Astronomical tuning and magnetostratigraphy of Neogene biogenic reefs in Xisha Islands, South China Sea显示文摘Biogenic reefs are one of two major depositional types in the South China Sea, and are constructed by coral, algae and bryozoa. The West Pacific is a major area of biogenic reef development and plays a critical role in the global carbon cycle. However, the lack of geochronological studies in previous works inhibits our understanding of their contributions. Herein, we conduct a cyclostratigraphic and magnetostratigraphic study on Neogene biogenic reefs using the XK–1 core that was drilled at the Shidao Island,Xisha(Paracel) Islands. The main findings of this study are:(1) the establishment of reliable magentostratigraphy for Ledong, Huangliu, Meishan and Sanya Formations;(2) the magnetic susceptibility variation can be inferred as growth index and tuned to the 405–ka long eccentricity cycle;(3) the astronomical geochronology suggests that the bottom ages for Ledong, Yinggehai, Huangliu, Meishan,and Sanya Formations are 2.2 Ma, 5.7 Ma, 10.4 Ma, 16.6 Ma, and 24.3 Ma, respectively; and (4) Earth's eccentricity and obliquity played predominant roles in biogenic reef establishment on orbital to tectonic timescales. Thus, the reported geochronology offers an opportunity to test the contributions of various factors and hypothesize their roles in the global carbon cycle in future.Liang Yi Zhimin Jian Xinyu Liu Youhua Zhu Daojun Zhang Zhenfeng Wang Chenglong Deng 2018Science Bulletin2018,63,9:12
4Fundamental mechanisms and phenomena of clathrate hydrate nucleation显示文摘Insights into the mechanism of hydrate nucleation are of great significance for the development of hydrate-based technologies,hydrate relevant flow assurance,and the exploration of in situ natural gas hydrates.Compared with the thermodynamics of hydrate formation,understanding the nucleation mechanism is challenging and has drawn substantial attention in recent decades.In this paper,we attempt to give a comprehensive review of the recent progress of studies of clathrate hydrate nucleation.First,the existing hypotheses on the hydrate nucleation mechanism are introduced and discussed.Then,we summarize recent experimental studies on induction time,a key parameter evaluating the velocity of the nucleation process.Subsequently,the memory effect is particularly discussed,followed by the suggestion of several promising research perspectives.Jinlong Cui Zhenfeng Sun Xiaohui Wang Bin Yu Shudong Leng Guangjin Chen Changyu Sun 2019Chinese Journal of Chemical Engineering2019,27,9:11
5An effective method for improving the accuracy of Argo objective analysis显示文摘基于南船座数据的最佳的插值目的分析,改进被做到广泛地在数据吸收和客观分析系统使用的一个背景错误协变性矩阵的实验公式。明确地,关联的一个评价可伸缩那能有效地改善南船座客观分析的精确性被开发了。这个方法能自动地适应一个变量的坡度变化并且被叫作坡度依赖者关联规模方法。它南船座客观分析上的效果与 Gaussian 脉搏和光谱分析理论上被验证。一个维的模拟实验的结果证明坡度依赖者关联规模能改进客观分析系统的适应性,为充分吸收在有更大的海洋学的坡度的区域的观察的短波信息的分析计划使它可能。新计划在太平洋被用于南船座数据目的分析系统。结果显然被改进。ZHANG Chunling XU Jianping BAO Xianwen WANG Zhenfeng 2013Acta Oceanologica Sinica2013,32,7:11
6Structure and kinematic analysis of the deepwater area of the Qiongdongnan Basin through a seismic interpretation and analogue modeling experiments显示文摘Located at the northwest continental slope of the South China Sea, the Qiongdongnan Basin bears valley-shaped bathymetry deepening toward east. It is separated from the Yinggehai Basin through NW-trending Indo-ChinaRed River shear zone, and connected with NW subsea basin through the Xisha Trough. Along with the rapid progress of the deepwater exploration, large amounts of high resolution geophysical and geological data were accumulated. Scientific researches about deepwater basins kept revealing brand new tectonic and sedimentary discoveries. In order to summarize the structural features and main controlling factors of the deepwater Qiongdongnan Basin, a series of researches on basin architecture, fault activities, tectonic deformation and evolution were carried out. In reference to analogue modeling experiments, a tectonic situation and a basin formation mechanism were discussed. The researches indicate that: the northern boundary of the Qiongdongnan Basin is strongly controlled by No. 2 fault. The overlapping control of two stress fields from the east and the west made the central depression zone extremely thinned. Combined with the changed stress field, the segmentation of a preexisting weakness zone made the sags in the east experiencing different rifting histories from the west ones. The NE-trending west segment of the Qiongdongnan Basin experienced strong rifting during Eocene, while the roughly EW-trending sags in the east segment show strong rifting during late Eocene and early Oligocene.Local structures such as NW-trending basal fault and inherited uplifts controlled the lateral segmentation. So first order factors such as regional stress field and preexisting weakness zone controlled the basin zonation, while the second order factors determined the segmentation from east to west.SUN Zhen WANG Zhenfeng SUN Zhipeng WANG Zhangwen ZHANG Wei HE Lijuan 2015Acta Oceanologica Sinica2015,34,4:10
7New insights on the origin of the basement of the Xisha Uplift,South China Sea显示文摘The study of basement geochronology provides crucial insights into the tectonic evolution of oceans. However, early studies on the basement of the Xisha Uplift were constrained by limited geophysical and seismic data; Xiyong1 was the only commercial borehole drilled during the 1970 s because of the huge thickness of overlying Cenozoic strata on the continental margin. Utilizing two newly-acquired basement samples from borehole XK1, we present petrological analysis and zircon uranium(U)-lead(Pb) isotope dating data in this paper that enhance our understanding of the formation and tectonic features of the Xisha Uplift basement. Results indicate that this basement is composed of Late Jurassic amphibole plagiogneisses that have an average zircon 206 Pb/238 U age of 152.9±1.7 Ma. However, the youngest age of these rocks, 137±1 Ma, also suggests that metamorphism termination within the Xisha basement occurred by the Early Cretaceous. These metamorphic rocks have adamellites underneath them which were formed by magmatic intrusions during the late stage of the Early Cretaceous(107.8±3.6 Ma). Thus, in contrast to the Precambrian age(bulk rubidium(Rb)-strontium(Sr) analysis, 627 Ma) suggested by previous work on the nearby Xiyong1 borehole, zircons from XK1 are likely the product of Late Mesozoic igneous activity. Late Jurassic-Early Cretaceous regional metamorphism and granitic intrusions are not confined to Xisha; rocks have also been documented from areas including the Pearl River Mouth Basin and the Nansha Islands(Spratly Islands) and thus are likely closely related to large-scale and long-lasting subduction of the paleo-Pacific plate underneath the continental margins of East Asia, perhaps the result of closure of the Meso-Tethys in the South China Sea(SCS). Controversies remain as to whether, or not, the SCS region developed initially on a uniform Precambrian-aged metamorphic crystalline basement. It is clear, however, that by this time both Mesozoic compressive subduction and Cenozoic rifting and extension had significantly modified the original basement of the SCS region.ZHU WeiLin XIE XiNong WANG ZhenFeng ZHANG DaoJun ZHANG ChengLi CAO LiCheng SHAO Lei 2017Science China Earth Sciences2017,60,12:10
8From digital Earth to smart Earth显示文摘This article will analyze the achievements of the digital Earth concept and further introduce two key technologies,the internet of things and cloud computing.Both these technologies are accelerating the development of digital Earth toward a new concept—smart Earth.The objective of this article is to discuss the architecture,infrastructure,and typical applications for smart Earth and to elaborate on trends of the movement from digital Earth to smart Earth.Deren Li Yuan Yao Zhenfeng Shao Le Wang 2014Chinese Science Bulletin2014,59,8:9
9Warpage prediction of the injection-molded strip-like plastic parts显示文摘For most strip-like plastic injection molded parts,whose cross section size is much smaller than their length,the traditional Hele-Shaw model and three-dimensional model do not work well in the prediction of the warpage because of their special shape.A new solution was suggested in this work.The strip-like plastic part was regarded as a little-curved beam macroscopically,and was divided into a few one-dimensional elements.On the section of each elemental node location,two-dimensional thermal finite element analysis was made to obtain the nonuniform thermal stress caused by the time difference of the solidi fication of the plastic melt in the mold.The stress relaxation,or equivalently,strain creep was dealt with by using a special computing model.On the bases of in-mold elastic stress,the final bending moment to the beam was obtained and the warpage was predicted in good agreement with practical cases.Chaofang Wang Ming Huang Changyu Shen Zhenfeng Zhao 2016Chinese Journal of Chemical Engineering2016,24,5:9
10Geology and hydrocarbon accumulations in the deepwater of the northwestern South China Sea——with focus on natural gas显示文摘The deepwater of the northwestern South China Sea is located in the central to southern parts of the Qiongdongnan Basin(QDN Basin),which is a key site for hydrocarbon exploration in recent years.In this study,the authors did a comprehensive analysis of gravity-magnetic data,extensive 3D seismic survey,cores and cuttings,paleontology and geochemical indexes,proposed the mechanism of natural gas origin,identified different oil and gas systems,and established the model of hydrocarbon accumulations in the deep-water region.Our basin tectonic simulation indicates that the evolution of QDN Basin was controlled by multiple-phased tectonic movements,such as Indochina-Eurasian Plate collision,Tibetan Uplift,Red River faulting and the expansion of the South China Sea which is characterized by Paleogene rifting,Neogene depression,and Eocene intensive faulting and lacustrine deposits.The drilling results show that this region is dominated by marineterrestrial transitional and neritic-bathyal facies from the early Oligocene.The Yacheng Formation of the early Oligocene is rich in organic matter and a main gas-source rock.According to the geological-geochemical data from the latest drilling wells,Lingshui,Baodao,Changchang Sags have good hydrocarbon-generating potentials,where two plays from the Paleogene and Neogene reservoirs were developed.Those reservoirs occur in central canyon structural-lithologic trap zone,Changchang marginal trap zone and southern fault terrace of Baodao Sag.Among them,the central canyon trap zone has a great potential for exploration because the various reservoirforming elements are well developed,i.e.,good coal-measure source rocks,sufficient reservoirs from the Neogene turbidity sandstone and submarine fan,faults connecting source rock and reservoirs,effective vertical migration,late stage aggregation and favorable structural–lithological composite trapping.These study results provide an important scientific basis for hydrocarbon exploration in this region,evidenced by the recent discovery of the significant commercial LS-A gas field in the central canyon of the Lingshui Sag.WANG Zhenfeng SUN Zhipeng ZHANG Daojun ZHU Jitian LI Xushen HUANG Baojia GUO Minggang JIANG Rufeng 2015Acta Oceanologica Sinica2015,34,10:9
11Synthesis,functionalization,and nanomedical applications of functional magnetic nanoparticles显示文摘Synthesis of magnetic nanoparticles(MNPs) is one of the most active research areas in advanced materials. MNPs that have magnetic properties and other functionalities have been demonstrated to show great promise in nanomedical applications. This review summarizes the current MNPs preparation,functionalization and stabilization methods. It also analyzes the detailed features of MNPs. And furthermore it highlights some actual case analyses of these MNPs for disease therapy, drug delivery,hyperthermia, bioseparation and bioimaging applications.Zhou Chen Cao Wu Zhenfeng Zhang Wangping Wu Xuefeng Wang Zhiqiang Yu 2018Chinese Chemical Letters2018,29,11:7
12Geochemistry of Pore Water and Associated Diagenetic Reactions in the Diapiric Area of Yinggehai Basin, Northwestern South China Sea显示文摘这研究在 Yinggehai 盆的 diapiric 区域检验了毛孔水的 geochemical 特征,西北的华南海,并且照亮了盆液体的起源和进化。甚至没有大气的水渗入,有低咸度的毛孔水在 diapiric 区域发生在海洋的沉积。在内的低咸度的水的存在深, overpressured 分隔空间被假定由于 smectite-illite 转变。Howerver 在有正常压力的 diapiric 区域的浅部分(不到 2 000 m ) ,毛孔水在 overpressured 间隔比那有一个宽得多的变化和低得多的咸度。它的全部的溶解固体(TDS ) 内容是 5 336 ~ 35 939 mg/L。而且,当 kaolinite 和 illite 在更浅的间隔满足增加,绿土和绿泥石内容严厉地减少。在 diapiric 结构的毛孔水的 geochemical 变化显示逐出低咸度,沿着垂直差错的 overpressured 液体。从深 overpressured 沉积的热液体的强壮的注射在浅水库导致快速的泥土矿物质转变。因而,从更深的 overpressured 沉积物由于液体逐出混合的液体象一些 diagenetic 反应一样在咸度和离子的作文导致变化。这包括更深热的液体的更高的 temperatur 引起的泥土矿物质的转变,例如,到 illite 的绿土和到 kaolinite 的绿泥石的 transfromation。因此,在咸度的变化和在各种各样的迫使的系统的离子的作文提供线索给流动小径和联系 diagenetic 反应。Tao Jiang Xinong Xie Hui Chen Zhenfeng Wang Xushen Li 2015Journal of Earth Science2015,26,3:6
13Acetyl salicylic acid attenuates cardiac hypertrophy through Wnt signaling显示文摘室的肥大是心血管的疾病的事件的一个强大、独立的预言者。低剂量的乙酰水杨酸酸(阿司匹林) 的脉管的性质通过血小板 cyclooxygenase 的不可逆的抑制提供心血管的好处 1;然而,可能的 anti-hypertrophic 性质和阿司匹林的潜在的机制没详细被调查。在这研究,健康野类型的雄的老鼠随机被划分成三个组并且使遭到了到横向的大动脉的收缩(TAC ) 或假冒的操作。操作 TAC 的老鼠与低剂量的阿司匹林的人的等价物被对待(10 mg 吗?Samuel Chege Gitau Xuelian Li Dandan Zhao Zhenfeng Guo Haihai Liang Ming Qian Lifang Lv Tianshi Li Bozhi Xu Zhiguo Wang Yong Zhang Chaoqian Xu Yanjie Lu Zhiming Du Hongli Shan Baofeng Yang 2015Frontiers of Medicine2015,9,4:6
14Evolution of deepwater sedimentary environments and its implication for hydrocarbon exploration in Qiongdongnan Basin, northwestern South China Sea显示文摘Over the past several years, a number of hydrocarbon reservoirs have been discovered in the deepwater area of Qiongdongnan Basin, northwestern South China Sea. These oil/gas fields demonstrate that the evolution of the deepwater sedimentary environment are controlling the formation and distribution of large-scale clastic reservoirs. Integration between seismic and borehole data were necessary to best clarify the distribution and quality of these deepwater reservoirs. Geochemical and paleobiological evidence from discrete samples was also applied to document specific information regarding the sedimentary environment. Results show that the Qiongdongnan Basin has existed as a thriving marine environment since Oligocene, when several rifting depressions developed throughout the entire Qiongdongnan Basin. Triggered by the faults activities, several distinct provenances supplied the coarse sediments, transporting and depositing them in deep parts of the rifting depressions. A fan delta system then formed nearby the source in the deeper area of these rifting depressions. The sedimentary environment of Qiongdongnan gradiationally became deepwater since early Miocene.Consequently, abundances of sediments were transported from Hainan Island and Southern Uplift, and then sunk into the basin center. The submarine fans revealed by many boreholes in this area verified them as good reservoir. Because the area reached its lowest sea level at late Miocene and the Southern Uplift subsidenced under sea level, not providing any sediment, so that the carbonate mesa and biorhythms characteristic of this area also developed during this period. In the west part of Qiongdongnan Basin, sediments transported from Vietnam increased in response to the Tibetan Uplift. Consequently, a central canyon developed along the center of Qiongdongnan Basin, which has been confirmed by several boreholes as a favorable hydrocarbon reservoir. The clarification of the deepwater sedimentary environment's evolution is potentially highly beneficial to future hydrocarbon exploration in the deepwater area of Qiongdongnan Basin.WANG Zhenfeng JIANG Tao ZHANG Daojun WANG Yahui ZUO Qianmei HE Weijun 2015Acta Oceanologica Sinica2015,34,4:6
15Study of Longitudinal-Vertical Dynamics for In-Wheel Motor-Driven Electric Vehicles显示文摘The in-wheel motor(IWM)-driven electric vehicles(EVs)attract increasing attention due to their advantages in dimensions and controllability.The majority of the current studies on IWM are carried out with the assumption of an ideal actuator,in which the coupling effects between the non-ideal IWM and vehicle are ignored.This paper uses the braking process as an example to investigate the longitudinal-vertical dynamics of IWM-driven EVs while considering the mechanical-electrical coupling effect.First,a nonlinear switched reluctance motor model is developed,and the unbalanced electric magnetic force(UEMF)induced by static and dynamic mixed eccentricity is analyzed.Then,the UEMF is decomposed into longitudinal and vertical directions and included in the longitudinal-vertical vehicle dynamics.The coupling dynamics are demonstrated under different vehicle braking scenarios;numerical simulations are carried out for various road grades,road friction,and vehicle velocities.A novel dynamics vibration absorbing system is adopted to improve the vehicle dynamics.Finally,the simulation results show that vehicle vertical dynamic performance is enhanced.Yechen Qin Ze Zhao Zhenfeng Wang Guofa Li 2021Automotive Innovation2021,4,2:5
16Study on regional material flow analysis of Chengyang District in Qingdao显示文摘Base on the framework of material flow analysis (MFA) proposed by Eurostat, this paper collected relateddata and conducted a regional MFA for the Chengyang District in Qingdao. The indicators such as Direct Material Input(DMI), Direct Material Consumption (DMC) and Exports are calculated or estimated for the period of year 1995through 2004. Several derivable indicators defining direct material productivity and material intensity are also evaluatedand some valuable conclusions were drawn. DMI in absolute number increased from about 1645.9 kilotons in 1995 toabout 8052.5 kilotons in 2004. Imports contribute to about 47 to 69% of DMI, and the biggest component of imports isfossil fuel that approximately accounts for 50% of imports. DMI per capita of Chengyang District increased rapidly andreached 17.4 tons in 2004. Compared with other five economies studied by WRI, material consumption intensity ofChengyang District is significantly lower than developed countries, which indicates that Chengyang District is still in adevelopment stage. The direct material productivity (actual GDP per DMI) increased 59.1% from 1995 to 2004 and hasbeen higher than either of studies in China, which indicates efficiency of resources utilization has improved obviously inChengyang District. But there was significant increase in material input in the last decade, which shows that rapidincrease of economy is highly dependent on requirement and consumption of natural resources. Therefore, in order topromote the sustainability, it is essential to develop circular economy and improve utilization efficiency of resources.Zhou Zhenfeng Sun Yinglan Wang Jun 2006Ecological Economy2006,2,1:5
17Quasi-3-yr Cycle of Rainy Season Precipitation in Tibet Related to Different Types of ENSO during 1981–2015显示文摘The rainy season precipitation in Tibet(RSPT) is a direct cause for local floods/droughts. It also indirectly affects the thermal conditions of the Tibetan Plateau, which can result in anomalous patterns of atmospheric circulation over East Asia. The interannual variability of the RSPT is often linked with the El Ni?o–Southern Oscillation(ENSO), but the relevant mechanisms are far from being understood, particularly for different types of ENSO events. We investigated the interannual variation of the RSPT in association with different types of ENSO. A quasi-3-yr period of the RSPT(less–more–more precipitation) was significant at the 95% confidence level. A joint multi-taper method with singular value decomposition analysis of the coupled field between the RSPT and the sea surface temperature(SST)revealed that the developing eastern Pacific type El Ni?o was accompanied by a decrease in the RSPT. The shift from the central Pacific type El Ni?o to the eastern Pacific La Ni?a was accompanied by an increase in the RSPT. Weakening of the central Pacific La Ni?a was accompanied by an increase in the RSPT. Analysis of the mechanism of this coupling, using the same analysis method but other climatic factors, indicated that the gradually strengthening eastern Pacific El Ni?o can inhibit the Walker circulation, weakening the South Asian summer monsoon, and resulting in transport of less water vapor from the Bay of Bengal to Tibet. The change from the central Pacific El Ni?o to the eastern Pacific La Ni?a led to continued strengthening of the Walker circulation with westward movement of the ascending area. This enhanced the South Asian summer monsoon over the Arabian Sea and transported more water vapor to Tibet. The decreasing central Pacific La Ni?a accompanied by persistent cooling of SSTs in the equatorial Pacific led to a strong eastern North Pacific summer monsoon, causing an anomaly in the easterly transport of water vapor from the Sea of Japan to Tibet and increased RSPT.Chunxue WANG Zhenfeng MA 2018Journal of Meteorological Research2018,32,2:5
18Vertical migration through faults and hydrocarbon accumulation patterns in deepwater areas of the Qiongdongnan Basin显示文摘In the Qiongdongnan Basin, faults are well developed. Based on the drilling results, the traps controlled two or more faults are oil-rich. However, when only one fault cut through the sand body, there is no sign for hydrocarbon accumulation in the sandstone. In terms of this phenomenon, the principle of reservoir-forming controlled by fault terrace is proposed, i.e., when the single fault activates, because of the incompressibility of pore water, the resistance of pore and the direction of buoyancy, it is impossible for hydrocarbon to accumulate in sandstone. But when there are two or more faults, one of the faults acts as the spillway so the hydrocarbon could fill in the pore of sandstone through other faults. In total five gas bearing structures and four failure traps are considered, as examples to demonstrate our findings. According to this theory, it is well-advised that south steep slope zone of Baodao-Changchang Depression, south gentle slope zone of Lingshui Depression, north steep slope zone of Lingshui Depression, and north steep slope zone of Baodao Depression are the most favorable step-fault zones, which are the main exploration direction in next stage.WANG Zhenfeng LIU Zhen CAO Shang SUN Zhipeng ZUO Qianmei WANG Yahui HE Weijun 2014Acta Oceanologica Sinica2014,33,12:4
19BEM/FDM Conjugate Heat Transfer Analysis of a Two-dimensional Air-cooled Turbine Blade Boundary Layer显示文摘A coupled 边界元素方法(BEM ) 和有限差别方法(频分多路复用) 被使用解决结合热转移问题一二维空气冷却汽轮机片界面层。泛泛地联合的策略被采用,在哪个地方程的每个集合被解决为其它提供边界条件。海军司烧方程被 HIT-NS 代码解决。在这代码, FDM 被收养并且被用来在液体区域解决对流的热转移。BEM 代码被用来在稳固的区域解决传导热转移。一个重申的集中标准在液体固体接口是温度和热流动的连续性。从在这篇论文采用的 BEM 的数字结果在对分析答案的结果和商业代码的结果的好同意,例如流畅 6.2。BEM 避免在另外的计算方法需要的复杂网孔并且节省计算时间。结果证明在这篇论文采用的 BEM 能与更少的边界点在数字结果给一样的精确。比较 conjugate 与一个绝热壁流动答案的数字结果结果,它在金属温度的分发揭示重要差别。结果从结合热转移分析是更精确的,他们接近汽轮机的现实主义的热环境。Wang Zhenfeng Yan Peigang Guo Zhaoyuan Han Wanjin 2008Journal of Thermal Science2008,17,3:4
20Effects of Alloying Elements on Microstructure and Erosion Resistance of Fe-C-Cr Weld Surfacing Layer显示文摘Effects of alloying elements on microstructure and erosion resistance of Fe-C-Cr weld surfacing layer have been studied. The experimental results show that increasing C and Cr content favors improving the erosion resistance of the layer, and the excessive C and Cr result in decreasing the erosion resistance at 90 deg. erosion. That Mo, Nb or Ti improves the erosion resistance of Fe-C-Cr weld surfacing layer is mainly attributed to increasing the amount of M7C3 and forming fine NbC or TiC in austenite matrix, but the excessive Mo, Nb or Ti is unfavorable. The addition of Mo, Nb and Ti in proper combination possesses stronger effect on improving the erosion resistance and the erosion resistance (εA) of Fe-C-Cr weld surfacing layer with fine NbC, TiC and M7C3 distributing uniformly in austenite matrix obviously increases to 2.81 at 15 deg. erosion and 2.88 at 90 deg. erosion when the layer composition is 3.05C, 20.58Cr, 1.88Mo, 2.00Nb and 1.05Ti (in wt pct).Daqian SUN, Wenquan WANG, Zhaozhi XUAN, Yue XU and Zhenfeng ZHOUSchool of Materials Science and Engineering, Jilin University, Changchun 130025, China 2003Journal of Materials Science & Technology2003,19,4:4
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