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| 1 | Gas Hydrates in the Qilian Mountain Permafrost, Qinghai, Northwest China显示文摘Qilian Mountain permafrost, with area about 10×104 km2, locates in the north of Qinghai-Tibet plateau. It equips with perfect conditions and has great prospecting potential for gas hydrate. The Scientific Drilling Project of Gas Hydrate in Qilian Mountain permafrost, which locates in Juhugeng of Muri Coalfield, Tianjun County, Qinghai Province, has been implemented by China Geological Survey in 2008–2009. Four scientific drilling wells have been completed with a total footage of 2059.13 m. Samples of gas hydrate are collected separately from holes DK-1, DK-2 and DK-3. Gas hydrate is hosted under permafrost zone in the 133–396 m interval. The sample is white crystal and easily burning. Anomaly low temperature has been identified by the infrared camera. The gas hydrate-bearing cores strongly bubble in the water. Gas-bubble and water-drop are emitted from the hydrate-bearing cores and then characteristic of honeycombed structure is left. The typical spectrum curve of gas hydrate is detected using Raman spectrometry. Furthermore, the logging profile also indicates high electrical resistivity and sonic velocity. Gas hydrate in Qilian Mountain is characterized by a thinner permafrost zone, shallower buried depth, more complex gas component and coal-bed methane origin etc. | ZHU Youhai ZHANG Yongqin WEN Huaijun LU Zhenquan JIA Zhiyao LI Yonghong LI Qinghai LIU Changling WANG Pingkang GUO Xingwang | 2010 | Acta Geologica Sinica(English Edition)2010，84，1： | 19 |
| 2 | Geochemistry and genesis of authigenic pyrite from gas hydrate accumulation system in the Qilian Mountain permafrost, Qinghai, northwest China显示文摘A type of authigenic pyrites that fully fill or semi-fill the rock fractures of drillholes with gas hydrate anomalies are found in the Qilian Mountain permafrost; this type of pyrite is known as 'fracture-filling' pyrite. The occurrence of 'fracture-filling' pyrite has a certain similarity with that of the hydrate found in this region, and the pyrite is generally concentrated in the lower part of the hydrate layer or the hydrate anomaly layer. The morphology, trace elements, rare earth elements, and sulfur isotope analyses of samples from drillhole DK-6 indicate that the 'fracture-filling' pyrites are dominated by cubic ones mainly aligned in a step-like fashion along the surfaces of rock fractures and are associated with a circular structure, lower Co/Ni and Sr/Ba, lower ?REE, higher LREE, significant Eu negative anomalies, and ? 34 SCDT positive bias. In terms of the pyrites' unique crystal morphology and geochemical characteristics and their relationship with the hydrate layers or abnormal layers, they are closely related with the accumulation system of the gas hydrate in the Qilian Mountain permafrost. As climate change is an important factor in affecting the stability of the gas hydrate, formation of fracture-filling pyrites is most likely closely related to the secondary change of the metastable gas hydrate under the regional climate warming. The distribution intensity of these pyrites indicates that when the gas hydrate stability zone(GHSZ) is narrowing, the hydrate decomposition at the bottom of the GHSZ is stronger than that at the top of the GHSZ, whereas the hydrate decomposition within the GHSZ is relatively weak. Thus, the zone between the shallowest and the deepest distribution of the fracture-filling pyrite recorded the largest possible original GHSZ. | WANG PingKang ZHU YouHai LU ZhenQuan HUANG Xia PANG ShouJi ZHANG Shuai JIANG ShaoQing LI QingHai YANG KaiLi LI Bing | 2014 | Science China Earth Sciences2014，57，9： | 6 |
| 3 | Cretaceous Oceanic Red Beds:Distribution,Lithostratigraphy and Paleoenvironments显示文摘白垩纪海洋的红床(CORB ) 由红页岩和泥土代表了,在白垩纪期间并且早被扔古新,主要在 Tethyan 领域,在更低的斜坡并且深渊盆环境。CORB 的详细研究是稀罕的;因此,我们从钻在南部的欧洲,西北的德国,亚洲和新西兰暴露的白垩纪岩石潜水艇在空中的核心和露头的深海海洋编了 CORB 数据。在 Tethyan 领域, CORB 主要由微红或粉红色的页岩,石灰石和泥土石头组成。由对比,泥土石头和粉笔在深海洋的钻的核心是稀罕的。在从大西洋的核心的上面的白垩纪海洋的沉积是在颜色的褐,微红的褐,微黄色的褐和苍白的褐的主要各种各样的阴影。一些红,粉红色,黄和橘子白垩纪沉积也是现在。CORB 的最普通的年龄在海洋的缺氧的事件(OAE ) 以后经常 oxic 免职主要是到 Maastrichtian 的早 Campanian,与发作,在早 Aptian 期间,迟了 Albian 早 Turonian 和 Campanian。这建议一显示并且以前没认出在 OAE,黑页岩免职和 CORB 之间的关系。CORB 尽管全球性散布了,在诺思大西洋和 Tethyan 领域是很普通的,在里面对北半球的中间的纬度低;在南方大西洋和印度洋在对南部的半球的高纬度中间;并且在中央太平洋是不太经常的。他们的普遍出现可能在迟了的白垩纪期间是为深海洋的当前的循环在之间建立一个连接的结果和平并且在在海洋的盆的南方和诺思大西洋和变化之间的演变连接通风。 | CHEN Xi WANG Chengshan HU Xiumian HUANG Yongjian WANG Pingkang Luba JANSA ZENG Xuan | 2007 | Acta Geologica Sinica(English Edition)2007，81，6： | 4 |
| 4 | A Recursire Rule Base Adjustment Algorithm for A Fuzzy Logic Controller显示文摘 | Pingkang Li George W Irwin Uwe Kruger | 2005 | Fuzzy Sets and Systems2005，166，： | 1 |
| 5 | A recursive rule base adjustment algorithm for a fuzzy logic controller 显示文摘 | Pingkang Li George W Irwin and Uwe Kruger | 2005 | Fuzzy Sets and Systems2005，156，2： | 1 |
| 6 | Petrologic characteristics and genesis of dolostone from the Campanian of the SK-I Well Core in the Songliao Basin,China显示文摘在 Songliao 盆的井滑雪是在中国指向大陆人白垩纪阶层的第一科学地上凿穿。dolostone 的卵形的凝固物,薄薄片和床被发现年龄在 Campanian 的 Nenjiang 形成在 mudstone 和器官富人的黑页岩以内设置了。低订的铁的白云石与在成岩作用期间形成的多云的原子核和轻边界由 euhedralsubhedral 菱形组成,它是代替的典型特征。重碳同位素( 13CPDB 1.1616.0 )是由微生物的有机物的发酵的结果并且在成岩作用的时期期间二氧化碳排除,并且轻氧同位素的存在( 18OPDB 18.535.1 )意味着碳酸盐的新鲜的水影响的一个典型特征可能被地面水或雨水在迟了的成岩作用改变了。进通常湖的盆的海洋的水进入被两个在白云石发生的一样的阶层证明了 Z 价值和有孔虫类的出现的咸度。SEM 观察的黄铁矿 framboids 通常在白云石晶体或在 mudstones 被围住,支持减少细菌(SRB ) 的硫酸盐。白云石和黄铁矿的形成与海洋的水进入被联系,它不仅为白云石供应镁离子,而且在盆导致有限碳酸盐降水。黄铁矿 framboids 的存在显示在湖与咸度层化联系的缺氧的环境的发展。在 Nenjiang 形成的白云石是海洋的水进入,石灰质的碳酸盐的 diagenetic 代替和硫酸盐减少细菌(SRB ) 的结果。 | Xiang Gao Pingkang Wang Dairong Li Qiang Peng Chengshan Wang Hongwen Ma | 2012 | Geoscience Frontiers2012，3，5： | 1 |
| 7 | Pyrite morphology in the first member of the Late Cretaceous Qingshankou Formation, Songliao Basin, Northeast China显示文摘 | Pingkang Wang Yongjian Huang Chengshan Wang Zihui Feng Qinghua Huang | 2013 | Palaeogeography Palaeoclimatology Palaeoecology2013，，： | 1 |
| 8 | Gas hydrate stability zone migration occurred in the Qilian mountain permafrost, Qinghai, Northwest China: Evidences from pyrite morphology and pyrite sulfur isotope 显示文摘 | WANG PINGKANG ZHU YOUHAI LU ZHENQUAN | 2014 | Cold Regions Science and Technology2014，98，： | 1 |
| 9 | Application study on monitoring a large power plant operation 显示文摘 | Li Pingkang | 2006 | Intelligent control and automation2006，，： | 1 |
| 10 | A Recursive Algorithm for Nonlinear Dynamical System Analysis Based on ADM显示文摘To improve the limitation of Adomian finite term series solution reducing the convergence for nonlinear dynamical systems, a recursive algorithm for nonlinear systems analysis based on Adomian Decomposition Method( ADM) with suitable truncation order is proposed. The recursive algorithm makes use of Differential Transformation( DT) theory to convert the analytic solution from series into matrix,and then the solution matrix is used in each discrete interval to compute numerical solution iteratively. The maximum stable step-size criterion using recursion percent error( RPE) is developed for good convergence in each iteration. As classic nonlinear dynamical equations,the second-order equation with one RPE and the coupling Duffing equations with two RPEs are illustrated. Comparison results demonstrate that the presented algorithm is valid and applicable to nonlinear dynamical systems analysis. | Chen Chen Pingkang Li | 2016 | Journal of Harbin Institute of Technology(New Series)2016，23，1： | 0 |
| 11 | Simple recursive algorithm for linear-in-the-parameters nonlinear model identification显示文摘This paper introduces a simple recursive algorithm for nonlinear dynamic system identification using linear-in-the-parameters models for NARX or RBF network where both the structure and parameters can be obtained simultaneously and recursively. The main objective is to improve the numerical stability when the model terms are highly correlated. This is based on the 'innovation' idea and net contribution criteria. Using the recursive formulae for the computation of the Moore-Penrose inverse of matrices and the net contribution of model terms, it is possible to combine the structure term determination and parameters estimation within one framework by adding and deleting an item in the selected candidate model. The formulae for enhancing and reducing a matrix are given. Simulation results show the proposed method is numerically more stable than existing approaches. | LI PingKang JIN TaoTao DU XiuXia | 2009 | Science in China(Series F)2009，52，10： | 0 |
| 12 | Very Low-power Wireless Communication Technology-ZigBee显示文摘The ZigBee as the main supporting technology for the wireless sensor network has received extensive attention. Completed ZigBee protocol kits consist of the high-level application specification, the application convergence layer, the network layer, the data link layer, and the Physical (PHY) layer. The protocols of the network layer and higher ones are set up by the ZigBee Alliance, the physical layer and the Media Access Control (MAC) layer are defined by the IEEE 802.15.4 standard. The IEEE 802.15.4 physical layer simply adopts technologies of mapping from bit to symbol, conversion from symbol to chip sequence, and Offset Quadrature Phase Shift Keying (OQPSK) modulation, avoiding complicated arithmetic such as channel coding. The IEEE 802.15.4 MAC layer adopts Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) technology and supports the sleeping mode. The ZigBee enables low data transmission rate, low power consumption at low cost, and is more suitable for industry monitoring systems, sensor networks, home monitoring systems, and security systems. | Zhang PingKang GuixiaTian Hui(Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China) | 2006 | ZTE Communications2006，4，4： | 0 |
| 13 | A New Regional Power Exchange Analytic Method显示文摘 | Pingkang Zhang | 2006 | China-USA Business Review2006，5，4： | 0 |
| 14 | Pyrite Morphology Variations from the Upper Cretaceous Qingshankou Formation Unit 1 in Songliao Basin,Northeast China:Evidence for Excursions of the O2-H2S Redox Transition显示文摘Pyrite is a ubiquitous authigenic mineral in modern anoxic sediments and occurs in ancient sedimentary rocks.Study of sedimentary pyrite morphology, which can provide useful information on deposition environments and early diagenetic processes,has become an important aspect for reconstruction of palaeoenviroment.The Upper Cretaceous Qingshankou Formation Unit 1(K2qn1)lithology,which occured in the south well of the SLCORE I for Continental Cretaceous Scientific Drilling Project | Pingkang Wang,Chengshan Wang,Yongjian Huang China University of Geosciences(Beijing),Beijing 100083,China. | 2009 | 地学前缘2009，16，S1： | 0 |
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