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High-Resolution Transgressive-Regressive Sequence Stratigraphy of Chang 8 Member of Yanchang Formation in Southwestern Ordos Basin,Northern china

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Journal of Earth Science 2010年第4期21卷 423-438页

作者：吕明胜陈开远薛良清衣丽萍朱红涛 Research Institute of Petroleum Exploration & Development PetroChina School of Energy Resources China University of Geosciences china National Oil and Gas Exploration and Development Corporation Faculty of Earth Resources China University of Geosciences

The reservoirs within the Chang 8 Member of Yanchang(延长) Formation in the southwestern Ordos basin are characterized by low *** is significant to build a high-resolution sequence stratigraphic framework for the exploration and development of these *** on an integrated investigation of well logs,seismic data,cores and outcrops,the Chang 8 Member is interpreted as a 3.d-order transgressive-regressive(T-R) sequence,which consists of six 4th-order T-R sequences,namely,K1,K2.K3.K4,K5 and K6,respectively,from base to *** 4th-order sequence comprises a transgressive systems tract overlain by a regressive systems *** K1 to transgressive systems tract of K4,it is characterized by the landward shifts of facies and overall retrogradational sequence stacking pattern due to accommodation increase more than sediment supply during the 3.d-order base-level *** distributary channels are mainly deposited in the transgressive systems tracts,and the interdistributary bays,sheet sands,and small-scale mouth bars are primarily developed in the regressive systems tracts in response to the 4th-order base-level *** the regressive systems tracts of K4 to K6,it is characterized by the basinward shifts of facies and overall progradational sequence stacking pattern because of accommodation increase less than sediment supply during a fall in 3.d-order base *** distributary channels are mainly accumulated in the transgressive systems tracts,and distributary channels and mouth bars are deposited in the regressive systems tracts as a result of the 4th-order base-level *** stratigraphic and sedimentological analyses indicate that sequences K1,K2.K5 and K6,as well as the basin edge of K3.and K4,remain potential for exploration and development due to their high reservoir quality in response to the low accommodation and more sediment supply.

关键词： transgressive-regressive sequence base level sediment supply sequence stratigraphic framework Ordos basin.

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热带西太平洋大气气候基本态与厄尔尼诺期间赤道附近西风异常

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海洋学报 2002年第2期24卷 39-50页

作者：严邦良张人禾中国科学院大气物理研究所北京100080 中国气象科学研究院北京100081

利用合成分析的方法分析了自1961年以来观测到的8次厄尔尼诺事件中赤道西太平洋地区西风异常与大气气候基本态的关系,结果发现厄尔尼诺年赤道西太平洋地区西风异常具有和大气气候基本态相一致的季节变化特征.利用一个简单热带海-气耦合... 详细信息

利用合成分析的方法分析了自1961年以来观测到的8次厄尔尼诺事件中赤道西太平洋地区西风异常与大气气候基本态的关系,结果发现厄尔尼诺年赤道西太平洋地区西风异常具有和大气气候基本态相一致的季节变化特征.利用一个简单热带海-气耦合模式较好地模拟出了观测到的厄尔尼诺年赤道西太平洋地区西风异常的变化特征.对模式结果的分析表明,大气气候基本态对厄尔尼诺年赤道西太平洋地区西风异常的形成起重要作用,它是通过影响大气模式中的加热场来影响赤道西太平洋地区西风异常.大气模式中赤道太平洋地区的加热场的形成具有阶段性和地区性,在厄尔尼诺事件的初始阶段,大气气候基本态是大气模式中的加热场形成的主要因子,而在厄尔尼诺事件的发展和成熟阶段,赤道中东太平洋地区的海表温度异常（SSTA）是加热场形成的主要因子.模式模拟结果对大气气候基本态依赖的敏感性试验说明,在大气模式加热场中含有大气气候基本态的模拟中,沿中西太平洋赤道附近的纬向风异常表现出和观测类似的传播特征.

关键词：厄尔尼诺事件海气耦合模式大气气候基本态太平洋西风异常

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The Boiler Tube Wall Thickness Quantitative Evaluation Fusing the Magnetic and Ultrasonic Technique

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武汉理工大学学报 2006年第S3期28卷 800-804页

作者： SONG Xiaochun~(1,2. HUANG Songling~2.ZHAO Daxing~1 (1.School of Mechanical Engineering,Hubei university of Technology,Wuhan 43.068,{3., 2.State Key Lab ef Power Systems,{2. of Electrical Engineering,Tsinghua university,beijing 100084,{3.) School of Mechanical Engineering Hubei University of TechnologyWuhan 430068China State Key Lab of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China State Key Lab of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China School of Mechanical Engineering Hubei University of TechnologyWuhan 430068China

Wall thickness is always a key index for boiler tube inspection in power plant,in order to improve the inspection efficiency and accuracy,a new method fusing the magnetic and ultrasonic technique was *** magnetic technique was used to do full inspection and locate the flaws,and the ultrasonic was employed to implement further quantitative inspection accu- *** comparing the precision of the polynomial,exponential and logarithmic function,the polynomial model was selected to fit the relations between the wall thickness and the peak value of magnetic signals,and the data measured by ultrasonic thickness meter was used to calibrate the model parameters online,the defect depth can be sized *** experimental results demon- grate that the model used in this system has better accuracy than the statistics relation model clearly,and it is also suitable for defect evaluation ***,it is unnecessary to have much more experimental data for the curve fitting technology,so it has better practicability than the other methods.

关键词： boiler tube main magnetic flux ultrasonic non-destructive testing

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APPLICATION OF THE MULTIGRID METHOD IN NUMERICALSIMULATION OF SEDIMENT TRANSPORT

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International Journal of Sediment Research 1999年第2期14卷 133-143页

作者： ZHAO Yongqing and FANG HongWei ( Sediment Research Lab, Tsinghua university, beijing 100084,{2.)

By combining FAS (Full Approximate Scheme) for nonlinear equations of multigrid method with Finite Volume Method, a plane two-dimensional mathematical model of sediment-transport is presented in this paper The analysis on the efficiency of this model shows that it can reduce the amount of computation greatly. Numerical simulation results of the Yellow River Langdian Water Source Project agree well with the test results of the physical model.

关键词： Multigrid method Mathematical model Sediment transport

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A new one-bit diFFerence collision attack on HAVAL-12.

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Science china(Information Sciences) 2012年第11期55卷 2521-2529页

作者： ZHANG WenYing1,2.3.LI YanYan1 & WU Lei1 1School of Information Science and Engineering,Shandong Normal university,Jinan 2.0014,{3. 2.tate Key Lab of Information Security,Institute of Information Engineering,Chinese Academy of Sciences,{2. 100093.{3. 3.handong Provincial Key Laboratory for Novel Distributed Computer Software Technology,Jinan 2.0014,{3. School of Information Science and Engineering Shandong Normal University Jinan China State Key Lab of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing China Shandong Provincial Key Laboratory for Novel Distributed Computer Software Technology Jinan China

In this paper,we give a new fast attack on *** attack includes many present methods of constructing hash ***,we present a neighborhood *** propose a new difference path different from the previous *** conclusion is that,when the output of each step satisfies our condition,the message m can collide with m'= m + Δm,where Δm =(0,0,0,0,2.1,0,...,0).There is only one bit difference between m and m'.Two pairs of collision examples for HAVAL-12. are *** order to improve the probability of collision,we use four tricks of message *** attack's running time is less than 2.5.83.2.pass HAVAL computations,which is the best result for one-bit collision of HAVAL so far.

关键词： cryptography hash function HAVAL-12. collision message modification

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Synchronization transition of limit-cycle systern with homogeneous phase shifts

Synchronization transition of limit-cycle systern with homog...

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第四届全国网络科学学术论坛暨研究生暑期学校

作者： Tingxian Zhang~(1,2. Zhigang Zheng~1 1 department of physics,Beijng Normal {2.,beijing 100875(china) 2.department of physics,Beijng Normal {2.,Qujing 655000(china)

The behaviors of coupled of which has periodic motion with randotn frequency in the absence of *** investigated when phase shifts are *** the system of coupled *** shifts are same betweend different *** and synchrcoization tranaition are revealed with different phase *** shifts play an important role for this kind *** phase shift a<0.5∏,synchronization state can be attained by increasing the *** system can not reach synchronization state when a≥0.5∏.A clear scaling between complete synchronization critical coupling strength K and a-0.5∏.

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短切纤维炭炭复合材料磁电阻特性研究

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新型炭材料 2004年第3期19卷 219-223页

作者：邓海金李明孙立李东生清华大学材料科学与工程系北京100084 北京百慕航材高科技股份有限公司北京100095

　研究了经不同温度下热处理后短切纤维模压预制体炭炭复合材料样品的磁电阻特性。研究结果表明C C复合材料的磁电阻-位向关系曲线的形状与C C预制体结构有关,不同预制体结构的材料,磁电阻-位向关系曲线形状不同。C C复合材料出现磁电... 详细信息

　研究了经不同温度下热处理后短切纤维模压预制体炭炭复合材料样品的磁电阻特性。研究结果表明C C复合材料的磁电阻-位向关系曲线的形状与C C预制体结构有关,不同预制体结构的材料,磁电阻-位向关系曲线形状不同。C C复合材料出现磁电阻恒为0的起始温度与材料的石墨化特性有很大关系。石墨化程度越高,材料的磁电阻越大,磁电阻达到0时的测量温度越高。研究发现,磁电阻-测量温度曲线回归方程的斜率随热处理温度的增加而降低,且斜率-热处理温度的变化曲线与材料d002.热处理温度的变化曲线形状类似。

关键词：磁电阻特性预制体炭/炭复合材料 C/C复合材料石墨化程度纤维模压类似斜率热处理温度

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大跨RC斜拉桥的非线性地震响应分析

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铁道学报 2004年第6期26卷 95-99页

作者：邹立华王克海赵人达西南交通大学土木工程学院交通部公路科学研究所北京100088

预先确定斜拉桥的弹塑性区域,把包含多微段平面变刚度梁单元推广应用于大跨度斜拉桥的非线性地震响应分析,用微段的刚度变化模拟钢筋混凝土的弹塑性性能,对双塔单索面钢筋混凝土斜拉桥进行了考虑几何非线性和材料非线性的地震响应分析,... 详细信息

预先确定斜拉桥的弹塑性区域,把包含多微段平面变刚度梁单元推广应用于大跨度斜拉桥的非线性地震响应分析,用微段的刚度变化模拟钢筋混凝土的弹塑性性能,对双塔单索面钢筋混凝土斜拉桥进行了考虑几何非线性和材料非线性的地震响应分析,编制了相应的弹塑性分析程序,并与Huges单元分析结果进行了比较。结果表明:该法能较好地模拟在强震作用下钢筋混凝土斜拉桥的非线性性能,可以在大跨斜拉桥的非线性地震响应分析中应用。

关键词：斜拉桥 RC 变刚度梁单元非线性

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Dynamical Behavior of Core ^3.e Nuclear Reaction-Diffusion Systems and Sun＇s Gravitational Field

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Transactions of Tianjin university 2005年第1期11卷 30-34页

作者：杜九林申洪 School of Sciences Tianjin University Tianjin 300072 China department of physics Gannan Teachers College Ganzhou 330047 China

The coupling of the sun's gravitational field with processes of diffusion and convection exerts a significant influence on the dynamical behavior of the core 3.e nuclear reaction-diffusion system. Stability analyses of the system are made in this paper by using the theory of nonequilibrium dynamics. It is showed that, in the nuclear reaction regions extending from the center to about 0.3. times of the radius of the sun, the gravitational field enables the core 3.e nuclear reaction-diffusion system to become unstable and, after the instability, new states to appear in the system have characteristic of time oscillation. This may change the production rates of both 7Be and 8B neutrinos.

关键词： stellar nuclear reaction solar neutrino problem astrophysical hydrodynamics

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Mechanical Method Determining Precipitation in an Ultra-Low Carbon Bainitic Steel

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International Journal of Minerals,Metallurgy and Materials 1998年第3期12卷 115-118页

作者： Zijiu Dang Yan Thang Jun Ke Xinlai He Shanwu Yang(State Key Laboratory for Advanced Metals and Materials, university of Science and Technology beijing, beijing 100083.{3.)(Applied Science School, university of Science and Technology beijing, Beijin State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China Applied Science School University of Science and Technology Beijing Beijing 100083 China

Stress relaxation was chosen as the best method for monitoring the precipitation process. Tests were carried out on an ultra-low carbon bainitic steel containing Mn, Nb and B over 800~950℃. Specimens were solu- tion treated at 12.0℃ for a certain holding period. A prestain of 2.% was applied at a strain rate of 0.1/s. The exper- imental results are displayed by a set of stress vs. 1g(time) curves different from the typical stress relaxation curves. There are two singularities forming a stress plateau on the stress vs.1g(time) curves when precipitates could be observed. Suppose the first one is the start of precipitation (Ps), and the second represcnts the fihish (Pf). As a result Precipitation-Time-Temperature relationship is described as C-shape curves based on two points. This mechanical method is suitable and precise for measuring precipitates in microalloyed steels during hot working.

关键词： stress relaxation precipitation ultra-low carbon bainitic steel (ULCB steel)

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