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| 1 | Distribution characteristic and geological signiflcance of rare earth elements in Lopingian mudstone of Permian,Panxian county,Guizhou province显示文摘In order to discuss the geochemical characteristic of REEs(rare earth elements) and their geological application,we measured the contents of rare earth elements,trace elements and minerals of 29 Lopingian(Late Permian) mudstone samples in Panxian county,carrying out ICP-MS and XRD analysis.The results show that the amount of REEs(185.56-729.46 10à6) is high.The ratios of w(LREE)/w(HREE)(6.84-13.86) and w(La)N/w(Yb)N(1.01-3.02) show clear differentiation of LREEs and HREEs.RREE has a significantly or critically positive correlation with lithophile elements Th,Nb,Ta,Ti,Ga,Sc,Cs,Zr,Hf,Sr,Be and chalcophile element Zn,a critically negative correlation with siderophile element Fe and a slightly positive correlation with illite,illite smectite mixed layers and siderite.REEs originate mainly from terrigenous minerals,in an inorganic phase.Source rocks of our samples consist of Emeishan basalt and a small part of sedimentary rocks,as suggested by the distribution patterns of REEs and w(PREE)-w(La)/w(Yb) diagram.Moreover,abnormal surfaces near the sequence boundaries(SB2,SB3,SB4) are related with the boundaries,identifled by geochemical characteristics of the REEs,such as PREE,w(LREE)/w(HREE),Eu/Eu and Ceanom. | Shao Yubao Guo Yinghai Qin Yong Shen Yulin Tian Li | 2011 | Mining Science and Technology2011，21，4： | 23 |
| 2 | Correlation and analysis of well-log sequence with Milankovitch cycles as rulers: A case study of coal-bearing strata of late Permian in western Guizhou显示文摘Based on the well-logging data of typical wells of Zhijin,Panxian and Weining areas in western Guizhou,the well-logging data GR of late Permian coal-bearing strata were processed and wavelet transform technique was used to carry out the sequence stratigraphy division and correlation.The study mainly focuses on the controlling effects which Milankovitch had on high frequency sequence,Milankovitch cycle can be used as a ruler of sequence stratigraphy division and correlation to ensure the scientifcity and the unity of sequence stratigraphy division.According to well-logging signal of the ideal Milankovitch cycle,the corresponding relation between the wavelet scales and the cycles is determined by wavelet analysis.Through analyzing analog signals of subsequence sets to search the corresponding relation between various system tracts and the features of time-frequency,the internal features of wavelet transform scalogram could be made clearly.According to ideal model research,features of Milankovitch curves and wavelet spectrum can be seen clearly and each well can be classifed into four third-order sequences and two system tracts.At the same time Milankovitch cycle can realize the division and correlation of stratigraphic sequence in a quick and convenient way. | Yuan Xuexu Guo Yinghai Yu Jifeng Shen Yulin Shao Yubao | 2013 | International Journal of Mining Science and Technology2013，23，4： | 6 |
| 3 | Pore-Throat Combination Types and Gas-Water Relative Permeability Responses of Tight Gas Sandstone Reservoirs in the Zizhou Area of East Ordos Basin, China显示文摘With the aim of better understanding the tight gas reservoirs in the Zizhou area of east Ordos Basin,a total of 222 samples were collected from 50 wells for a series of experiments.In this study,three pore-throat combination types in sandstones were revealed and confirmed to play a controlling role in the distribution of throat size and the characteristics of gas-water relative permeability.The type-I sandstones are dominated by intercrystalline micropores connected by cluster throats,of which the distribution curves of throat size are narrow and have a strong single peak(peak ratio>30%).The pores in the type-II sandstones dominantly consist of secondary dissolution pores and intercrystalline micropores,and throats mainly occur as slice-shaped throats along cleavages between rigid grain margins and cluster throats in clay cement.The distribution curves of throat size for the type-II sandstones show a bimodal distribution with a substantial low-value region between the peaks(peak ratio<15%).Primary intergranular pores and secondary intergranular pores are mainly found in type-III samples,which are connected by various throats.The throat size distribution curves of type-III sandstones show a nearly normal distribution with low kurtosis(peak ratio<10%),and the micro-scale throat radii(>0.5μm)constitute a large proportion.From type-I to type-III sandstones,the irreducible water saturation(Swo)decreased;furthermore,the slope of the curves of Krw/Krg in two-phase saturation zone decreased and the two-phase saturation zone increased,indicating that the gas relative flow ability increased.Variations of the permeability exist in sandstones with different porethroat combination types,which indicate the type-III sandstones are better reservoirs,followed by type-II sandstones and type-I sandstones.As an important factor affecting the reservoir quality,the pore-throat combination type in sandstones is the cumulative expression of lithology and diagenetic modifications with strong heterogeneity. | LI Mi GUO Yinghai LI Zhuangfu WANG Huaichang ZHANG Jingxia | 2019 | Acta Geologica Sinica(English Edition)2019，93，3： | 5 |
| 4 | Joint Estimation of Carrier Frequency and Phase Offset Based on Pilot Symbols in Quasi-Constant Envelope OFDM Satellite Systems显示文摘Spectral efficiency and energy efficiency are two important performance indicators of satellite systems. The Quasi-Constant Envelope Orthogonal Frequency Division Multiplexing(QCE-OFDM) technique can achieve both high spectral efficiency and low peak-to-average power ratio(PAPR). Therefore, the QCE-OFDM technique is considered as a promising candidate multi-carrier technique for satellite systems. However, the Doppler effect will cause the carrier frequency offset(CFO), and the non-ideal oscillator will cause the carrier phase offset(CPO) in satellite systems. The CFO and CPO will further result in the bit-error-rate(BER) performance degradation. Hence, it is important to estimate and compensate the CFO and CPO. This paper analyzes the effects of both CFO and CPO in QCE-OFDM satellite systems. Furthermore, we propose a joint CFO and CPO estimation method based on the pilot symbols in the frequency domain. In addition, the optimal pilot symbol structure with different pilot overheads is designed according to the minimum Cramer-Rao bound(CRB) criterion. Simulation results show that the estimation accuracy of the proposed method is close to the CRB. | Cheng Wang Gaofeng Cui Weidong Wang Yinghai Zhang | 2017 | China Communications2017，14，7： | 3 |
| 5 | Frequency Offset Compensation for Satellite Communication System with CE-OFDM显示文摘Constant envelope orthogonal frequency division multiplexing(CE-OFDM) is a waveform that can achieve 0d B peak-to-average power ratio and avoid the signal distortion caused by the nonlinear power amplifi er. However, the carrier frequency offset(CFO) in CE-OFDM systems can cause errors at phase unwrapper module. In this paper, a CFO estimation scheme is proposed for CEOFDM in satellite communication system. As the null subcarrier is inherent in the conjugate symmetric symbol structure at the transmitter, the proposed scheme uses the null subcarrier as prior information to estimate the CFO at the receiver. The ideal estimation range of normalized CFO is obtained by mathematical analysis. Simulation results show that the proposed scheme can estimate the CFO accurately under additive white Gaussian noise(AWGN) channel and multipath fading channel, especially for moderate and high signal-to-noise ratio(SNR). | Gaofeng Cui Cheng Wang Weidong Wang Yinghai Zhang | 2017 | China Communications2017，14，8： | 3 |
| 6 | A k-Coverage Scheduling Scheme in Wireless Sensor Network Based on Hard-Core Process in Rayleigh Fading Channel显示文摘Sensing coverage is a fundamental design issue in wireless sensor networks(WSNs),while sensor scheduling ensures coverage degree to the monitored event and extends the network lifetime.In this paper,we address k-coverage scheduling problem in dense WSNs,we maintain a connected k-coverage energy efficiently through a novel Hard-Core based Coordinated Scheduling(HCCS),in which hardcore is a thinning process in stochastic geometry that inhibits more than one active sensor covering any area redundantly in a minimum distance. As compared with existing coordinated scheduling,HCCS allows coordination between sensors with little communication overhead.Moreover,due to the traditional sensing models in k-coverage analysis is unsuitable to describe the characteristic of transmit channel in dense WSNs,we propose a novel sensing model integrating Rayleigh Fading and Distribution of Active sensors(RFDA),and derive the coverage measure and k-coverage probability for the monitored event under RFDA. In addition,we analyze the influence factors,i.e. the transmit condition and monitoring degree to the k-coverage probability. Finally,through Monte Carlo simulations,it is shown that the k-coverage probability of HCCS outperforms that of its random scheduling counterpart. | KANG Lin LI Xiuhua ZHANG Yinghai WANG Weidong LI Jinlan | 2015 | China Communications2015，12，11： | 2 |
| 7 | Geochemical Characteristics and Sedimentary Control of Pinghu Formation(Eocene)Coal-bearing Source Rocks in Xihu Depression,East China Sea Basin显示文摘Coal-bearing source rocks of the Pinghu Formation in the Xihu Depression comprise an important material basis of oil and gas resources in the East China Sea Basin.Based on drilling core observation results combined with the analysis and test results of macerals,trace/rare earth elements,and rock pyrolysis,the geochemical characteristics and sedimentary control of coal-bearing source rocks formation are discussed in a high-frequency sequence framework.The results indicate that the macerals composition of the coal-bearing source rocks of the Eocene Pinghu Formation in the Xihu Depression is dominated by vitrinite,with low-medium abundance of exinite and almost no inertinite.The coals and carbonaceous mudstones display higher amounts of total organic carbon(TOC)(14.90%-65.10%),S1+S2(39.24-136.52 mg/g),and IH(191-310 HC/g TOC)respectively,as compared to the mudstones.Organic matter is plotted in typeⅢkerogens and partially in typeⅡ;it is mainly in the low maturity stage.The trace elements results imply that the samples were deposited in a weakly reducing to weakly oxidizing environment and were occasionally affected by seawater.The coal-bearing source rocks were deposited in a relatively oxygen-containing environment.The coal-bearing source rocks development is jointly controlled by the coal accumulation environment,the water conditions affected by ocean currents in offshore basins in China,oxidation-reduction cycles of aqueous media and paleoclimate evolution in a high-frequency sequence framework. | SHEN Yulin QIN Yong CUI Min XIE Guoliang GUO Yinghai QU Zhenghui YANG Tianyang YANG Liu | 2021 | Acta Geologica Sinica(English Edition)2021，95，1： | 2 |
| 8 | A SDN-Based Energy Saving Strategy in Wireless Access Networks显示文摘This paper investigates on the base stations(BSs) sleeping control and energy saving in wireless network. The objective is to find the sleeping control and energy saving configuration between total power consumption and average video's quality. On the Software Defined Network(SDN) access network architecture, a type of sleeping control and active BSs' optimal transmitting time strategy is considered, the BS sleeps when there is no active users, and wakes up after a period of vacation time. In this paper, we study the active users grouping strategy, In order to spare more BSs into sleeping mode. Then this paper proposes an active BS transmitting time optimal strategy according to the users' Qo S. In the proposed strategy, the active BSs' transmitting time is minimized in order to save energy. This paper employs the mixed integer-programming model to present this optimization problem. Then we utilized a novel algorithm to save the energy in access networks and also meet the Qo S requirements. Both the analytical and simulation results show that the algorithm can effectively save energy in the access network BSs. | PENG Hongyu WANG Weidong WANG Chaowei CHEN Gang ZHANG Yinghai | 2015 | China Communications2015，12，8： | 2 |
| 9 | Steam hydration of CFBC ash and the effect of hydration con- ditions on reactivation显示文摘 | Yinghai Wu Edward J Anthony | 2004 | Fuel2004，，83： | 1 |
| 10 | Grouping- shuffling particle swarm optimization: An improved PSO for continuous optimization显示文摘 | Li Yinghai Dong Xiaohua Liu Ji | 2010 | Advances in Swarm Intelligence(Lecture Notes in Computer Scdeuce)2010，6145，： | 1 |
| 11 | Novel multi-objective shuffled frog leaping algorithm with application to reservoir flood control operation 显示文摘 | LI Yinghai ZHOU Jianzhong ZHANG Yongchuan | 2010 | Journal of Water Resources Planning and Management2010，136，4： | 1 |
| 12 | Graft copolymerization of butyl acrylate onto casein initiated by potassium diperiodatonickelate(Ⅳ) in alkaline medium显示文摘 | Yinghai LIU Yanzhe ZHANG Zhenghao LIU | 2002 | European Polymer Journal2002，，38： | 1 |
| 13 | Characteristics of Landsat 8 OLI-derived NDVI by comparison with multiple satellite sensors and in-situ observations显示文摘 | Yinghai Ke Jungho Im Junghee Lee | 2015 | Remote Sensing of Environment2015，164，： | 1 |
| 14 | CFBC ash hydration studies显示文摘 | Edward J. Anthony Lufei Jia Yinghai Wu | 2004 | Fuel2004，，11： | 1 |
| 15 | Eigenvalue problem for p-Laplacain three-point boundary value problems on time scales 显示文摘 | Hongrui Sun Lutian Tang Yinghai Wang | 2007 | J Math Anal Appl2007，331，： | 1 |
| 16 | Grafting of 4-Vinyl Pyridine onto Nylon-6 Initiated by Co(Ⅲ) 显示文摘 | Liu Yinghai Zhang Jianping Zhang Rongyue | 2007 | Journal of Macromolecular Science Part A: Pure and applied chemistry2007，44，： | 1 |
| 17 | An adaptive hybrid differential evolutionalgorithm for dynamic economic dispatch with valve-pointeffects 显示文摘 | Lu Youlin Zhou Jianzhong Qin Hui Li Yinghai ZhangYongchuan | 2010 | Expert Systems with Applications2010，37，： | 1 |
| 18 | CFBC Ash Hydration Studies显示文摘 | Edward J Anthony Jia Lufei Wu Yinghai | 2005 | Fuel2005，，84： | 1 |
| 19 | Graft copolymerization of methyl acrylate onto cellulose initiated by potassium ditelluratoargentate(III) 显示文摘 | Liu Yinghai Yang Lanying Shi Zengqian | 2004 | Polymer International2004，53，10： | 1 |
| 20 | Coupling parameter in synchronization of diluted neural networks 显示文摘 | Chen Yong Wang Yinghai | 2002 | Phys Rev E2002，65，41： | 1 |
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