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| 1 | Azimuthally pre-stack seismic inversion for orthorhombic anisotropy driven by rock physics显示文摘Based on the long-wavelength approximation,a set of parallel vertical fractures embedded in periodic thin interbeds can be regarded as an equivalent orthorhombic medium. Rock physics is the basis for constructing the relationship between fracture parameters and seismic response. Seismic scattering is an effective way to inverse anisotropic parameters. In this study,we propose a reliable method for predicting the Thomsen's weak anisotropic parameters and fracture weaknesses in an orthorhombic fractured reservoir using azimuthal pre-stack seismic data. First, considering the influence of fluid substitution in mineral matrix, porosity, fractures and anisotropic rocks, we estimate the orthorhombic anisotropic stiffness coefficients by constructing an equivalent rock physics model for fractured rocks. Further, we predict the logging elastic parameters, Thomsen's weak parameters, and fracture weaknesses to provide the initial model constraints for the seismic inversion. Then, we derive the P-wave reflection coefficient equation for the inversion of Thomsen's weak anisotropic parameters and fracture weaknesses.Cauchy-sparse and smoothing-model constraint regularization taken into account in a Bayesian framework, we finally develop a method of amplitude variation with angles of incidence and azimuth(AVAZ) inversion for Thomsen's weak anisotropic parameters and fracture weaknesses, and the model parameters are estimated by using the nonlinear iteratively reweighted least squares(IRLS) strategy. Both synthetic and real examples show that the method can directly estimate the orthorhombic characteristic parameters from the azimuthally pre-stack seismic data, which provides a reliable seismic inversion method for predicting Thomsen's weak anisotropic parameters and fracture weaknesses. | Xinpeng PAN Guangzhi ZHANG Xingyao YIN | 2018 | Science China Earth Sciences2018，61，4： | 9 |
| 2 | An advanced partitioning process for key elements separation from high level liquid waste显示文摘To separate MA(Am,Cm) and some fission product elements(FPs) such as Tc,Pd,Cs and Sr from high level liquid waste(HLLW) systematically,we have been studying an advanced aqueous partitioning process,which uses selective adsorption as the separation method.For this process,we prepared several novel adsorbents which were immobilized in a porous silica/polymer composite support(SiO 2-P).Adsorption and separation behavior of various elements was studied experimentally in detail.Small scale separation tests using simulated HLLW solutions were carried out.Pd(II) was strongly adsorbed by the AR-01 anion exchanger and effectively eluted off by using thiourea.Successful separation of Pd(II) from simulated HLLW was achieved.Tc(VII) also exhibited strong adsorption on AR-01 and could be eluted off by using U(IV) as a reductive eluent.Am(III) presented significantly high adsorbability and selectivity onto R-BTP/SiO 2-P adsorbents over various FPs including Ln(III).The R-BTP adsorbents were fairly stable in 3 M HNO 3,but instable against-irradiation-3M HNO 3.An advanced partitioning process consisting of three separation columns for the target elements separation from HLLW was proposed and the obtained experiment results indicated that the proposed process is essentially feasible. | WEI YueZhou WANG XinPeng LIU RuiQin WU Yan USUDA Shigekazu ARAI Tsuyoshi | 2012 | Science China Chemistry2012，55，9： | 9 |
| 3 | Hybrid Precoding for mm Wave Massive MIMO Systems with Different Antenna Arrays显示文摘In this paper, the performance of hybrid precoding is investigated for mmWave massive MIMO systems with different antenna arrays. The hybrid precoding with partially connected architecture (PCA) is adopted. The spectral efficiency (SE) and received energy efficiency (EE) are investigated by considering four types of antenna arrays, including uniform linear array (ULA), uniform rectangular planar array (URPA), uniform hexagonal planar array (UHPA), and uniform circular planar array (UCPA), respectively. We focus on analysis at the antenna response vector and utilize the idea of orthogonal matching pursuit algorithm to seek the optimal hybrid precoder. Furthermore, the trade-off of precoding architectures is studied between SE and received EE. Simulation results show that if the uniform planar array antenna is more concentrated, the SE and receive EE will be higher. Considering SE and received EE, the performance of planar arrays outperform linear array. There exist different optimal radio-frequency chain numbers to maximize the SE for planar array and linear array. In addition, the PCA can achieve relatively higher received EE while the SE is close to the fully connected architecture and the full digital architecture. | Qingfeng Ding Yuqian Deng Xinpeng Gao Mengxia Liu | 2019 | China Communications2019，16，10： | 6 |
| 4 | Digital/Analog Simulation Platform for Distributed Power Flow Controller Based on ADPSS and dSPACE显示文摘Distributed power flow controller,which is among the most powerful distributed flexible transmission equipments,is still only in the stage of the oretical research and digital simulation.In order to promote the engineering demonstration of a distributed power flow controller,it is urgent to establish a digital/analog simulation platform that supports closed-loop real-time simulation of a distributed power flow controller.In this paper,the electromagnetic transient model of a distributed power flow controller is established on ADPSS(advanced digital power system simulator).The rapid control prototype realized by dSPACE is connected to ADPSS to form a digital/analog simulation platform for a distributed power flow controller.Through a voltage control and power flow control simulation of the test system with a distributed power flow controller,the correctness and effectiveness of the constructed simulation platform are verified,which provides a new way for the verification of the new theory of a distributed power flow controller. | Aihong Tang Zhijian Lu Huiyuan Yang Xinpeng Zou Yong Huang Xu Zheng | 2021 | CSEE Journal of Power and Energy Systems2021，7，1： | 6 |
| 5 | Realizing high low-electric-field energy storage performance in AgNbO_(3) ceramics by introducing relaxor behaviour显示文摘Both sustainable development in environment and safety of high-power systems require to develop a novel lead-free dielectric capacitor with high energy density(Wrec)at low applied electric field.In this work,a remarkably high Wrec of 2.9 J/cm^(3) accompanying with energy storage efficiency of 56% was achieved in Ag_(0.9)Sr_(0.05)NbO_(3) ceramic at a low applied electric field of 190 kV/cm,by improving antiferroelectricity and introducing relaxor behaviour.The improved anti-ferroelectric stability was attributed to the decreased tolerance factor and average electronegativity difference,while the relaxor behaviour was associated with the increased disordered local structure by Sr-doping.Moreover,the Ag_(0.9)Sr_(0.05)NbO_(3) ceramics also exhibited outstanding temperature stability in energy density with small variation less than 5% over 20-140℃.The results indicate that the Ag_(0.9)Sr_(0.05)NbO_(3) ceramic is a promising candidate for low-electric-field driving capacitors. | Kai Han Nengneng Luo Shuaifei Mao Fangping Zhuo Xiyong Chen Laijun Liu Changzheng Hu Huanfu Zhou Xinpeng Wang Yuezhou Wei | 2019 | Journal of Materiomics2019，5，4： | 5 |
| 6 | Purification of scandium from concentrate generated from titanium pigments production waste显示文摘Nowadays 80%of scandium in China is obtained from titanium pigments production waste through a complex purification process.The study mainly focused on the purification of Sc from its concentrate generated from titanium pigments production waste by solvent extraction.Several extractants have been tried and 10%D_(2)EHPA-5%TBP-85%sulfonated kerosene exhibited the best extraction performance towards Sc in 7 mol/L H_(2)SO_(4)solution,so it was selected as the oil phase.0.5%of H_(2)O_(2)was added into the concentrated solution which can effectively inhibit the extraction of Ti.Both the extraction and back extraction parameters are optimized.The preferred extraction conditions were obtained,i.e.,acidity:7 mol/L H_(2)SO_(4),the phase ratio A/O:10,room temperature,mixed contact time:30 min,Sc concentrate:10 g/L,that the extraction rate of Sc in the above conditions was nearly 100%.NaOH was used for back extraction with the stripping rate 99%on the following conditions:5 mol/L NaOH stripping for 30 min at a phase ratio A/O:1 at 90℃.Finally,H_(2)C_(2)O_(4)was used to further purify the back extraction product and Sc_(2)(C_(2)O_(4))_(3)precipitant fo rmed.The final product Sc_(2)O_(3)with a purity over 99.5%was obtained by calcining Sc_(2)(C_(2)O_(4))_(3)at 1000℃for 2 h.A conceptual process for Sc purification was put forward and proved.The total recovery yield of Sc in the whole process is 95%. | Jie Zhou Shunyan Ning Jiejie Meng Shichang Zhang Wei Zhang Siyi Wang Yedan Chen Xinpeng Wang Yuezhou Wei | 2021 | Journal of Rare Earths2021，39，2： | 4 |
| 7 | Human embryonic stem cells-derived endothelial cell therapy facilitates kidney regeneration by stimulating renal resident stem cell proliferation in acute kidney injury显示文摘Endothelial cell therapy has been implicated to enhance tissue regeneration and vascularization in ischemic kidney. However, no published study has yet examined direct effects of endothelial cell treatment in kidney recovery. This study investigated the therapeutic efficacy of endothelial cells in a mouse model with acute kidney injury (AKI). Thus, human embryonic stem cells-derived endothelial cells (hESC-ECs) labeled with a reporter system encoding a double fusion reporter gene for firefly luciferase (Fluc) and green fluorescent protein (GFP) were characterized by Fluc imaging and immunofluoresence staining. Cultured hESC-ECs (1×106) were injected into ischemic kidney shortly after AKI. Survival of the transplanted hESC-ECs was monitored in vivo from day 1 to 14 after endothelial cell transplantation and potential impact of hESC-EC treatment on renal regeneration was assessed by histological analyses. We report that a substantial level of bioluminescence activity was detected 24 h after hESC-EC injection followed by a gradual decline from 1 to 14 d. Human ESC-ECs markedly accelerated kidney cell proliferation in response to ischaemia-induced damage, indicated by an elevated number of BrdU+ cells. Co-expression of Sca-1, a kidney stem cell proliferation marker, and BrdU further suggested that the observed stimulation in renal cell regeneration was, at least in part, due to increased proliferation of renal resident stem cells especially within the medullary cords and arteriole. Differentiation of hESC-ECs to smooth muscle cells was also observed at an early stage of kidney recovery. In summary, our results suggest that endothelial cell therapy facilitates kidney recovery by promoting vascularization, trans-differentiation and endogenous renal stem cell proliferation in AKI. | JIA XiaoHua L He LI Chen FENG GuoWei YAO XinPeng MAO LiNa KE TingYu CHE YongZhe XU Yong LI ZongJin KONG DeLing | 2013 | Chinese Science Bulletin2013，58，23： | 4 |
| 8 | Bayesian Markov chain Monte Carlo inversion for anisotropy of PP-and PS-wave in weakly anisotropic and heterogeneous media显示文摘A single set of vertically aligned cracks embedded in a purely isotropic background may be considered as a long-wavelength effective transversely isotropy(HTI) medium with a horizontal symmetry axis. The crack-induced HTI anisotropy can be characterized by the weakly anisotropic parameters introduced by Thomsen.The seismic scattering theory can be utilized for the inversion for the anisotropic parameters in weakly anisotropic and heterogeneous HTI media. Based on the seismic scattering theory, we first derived the linearized PP-and PS-wave reflection coefficients in terms of P-and S-wave impedances, density as well as three anisotropic parameters in HTI media. Then, we proposed a novel Bayesian Markov chain Monte Carlo inversion method of PP-and PSwave for six elastic and anisotropic parameters directly.Tests on synthetic azimuthal seismic data contaminated by random errors demonstrated that this method appears more accurate, anti-noise and stable owing to the usage of the constrained PS-wave compared with the standards inversion scheme taking only the PP-wave into account. | Xinpeng Pan Guangzhi Zhang Xingyao Yin | 2017 | Earthquake Science2017，30，1： | 3 |
| 9 | Preparation and application of gallium-based conductive materials in the very recent years显示文摘Gallium and its alloys are a group of metallic materials with low-melting points at or around room temperature.Apart from the good electrical conductivity,the unique liquid state endows those metals with excellent compliance and self-healing capacity,which present great value in the development of flexible and stretchable electronics.Constrained by the high surface tension and low viscosity,however,liquid metals cannot be applied to some common microelectronics manufacturing technologies such as micro-electro mechanics in the preceding years,which impedes their mass production in electronic devices.To address these issues and broaden the applications of liquid metals in electronics devices,numerous efforts have been taken and great progress has been made especially in the very recent years.This review summaries the recent development of liquid metal-based conductive materials from the aspects of preparation or modification methods and their accommodative fabrication techniques in flexible electronic applications.Further outlook including expectations and challenges of liquid metal-based conductive materials are also presented. | WANG XinPeng GUO JiaRui HU Liang | 2021 | Science China(Technological Sciences)2021，64，4： | 3 |
| 10 | Constitutive androstane receptor induced-hepatomegaly and liver regeneration is partially via yes-associated protein activation显示文摘The constitutive androstane receptor(CAR, NR3 I1) belongs to nuclear receptor superfamily.It was reported that CAR agonist TCPOBOP induces hepatomegaly but the underlying mechanism remains largely unknown. Yes-associated protein(YAP) is a potent regulator of organ size. The aim of this study is to explore the role of YAP in CAR activation-induced hepatomegaly and liver regeneration.TCPOBOP-induced CAR activation on hepatomegaly and liver regeneration was evaluated in wildtype(WT) mice, liver-specific YAP-deficient mice, and partial hepatectomy(PHx) mice. The results demonstrate that TCPOBOP can increase the liver-to-body weight ratio in wild-type mice and PHx mice.Hepatocytes enlargement around central vein(CV) area was observed, meanwhile hepatocytesproliferation was promoted as evidenced by the increased number of KI67+cells around portal vein(PV)area. The protein levels of YAP and its downstream targets were upregulated in TCPOBOP-treated mice and YAP translocation can be induced by CAR activation. Co-immunoprecipitation results suggested a potential proteineprotein interaction of CAR and YAP. However, CAR activation-induced hepatomegaly can still be observed in liver-specific YAP-deficient(Yape/e) mice. In summary, CAR activation promotes hepatomegaly and liver regeneration partially by inducing YAP translocation and interaction with YAP signaling pathway, which provides new insights to further understand the physiological functions of CAR. | Yue Gao Shicheng Fan Hua Li Yiming Jiang Xinpeng Yao Shuguang Zhu Xiao Yang Ruimin Wang Jianing Tian Frank JGonzalez Min Huang Huichang Bi | 2021 | Acta Pharmaceutica Sinica B2021，11，3： | 2 |
| 11 | Assistant pullback technique for main span closure of Sutong Bridge显示文摘Sutong Bridge is a cable-stayed steel box girder bridge with a main span of 1 088 m.The erection of upper structure adopts geometry control method and requires no change to the unit's size and the structure's none-stress geometry.Before main span closure,the cantilever of girder reaches 540.8 m,the structure state is noticeably influenced by external circumstances,the main span closure face great difficulty.By abstracting the advantage of the pullback method abroad and the domestic temperature-cutting method,a new assistant pullback method have put forward and bring into practice actually.In this paper,the analysis key point of practice conditions,key parameter of practice,main measures of the method and the performance is introduced. | Chen Ming Luo Chengbin Wu Qihe Zhang Yongtao You Xinpeng | 2009 | Engineering Sciences2009，7，1： | 2 |
| 12 | Improved Lossless Data Hiding for JPEG Images Based on Histogram Modification显示文摘This paper proposes a lossless and high payload data hiding scheme for JPEG images by histogram modification.The most in JPEG bitstream consists of a sequence of VLCs(variable length codes)and the appended bits.Each VLC has a corresponding RLV(run/length value)to record the AC/DC coefficients.To achieve lossless data hiding with high payload,we shift the histogram of VLCs and modify the DHT segment to embed data.Since we sort the histogram of VLCs in descending order,the filesize expansion is limited.The paper’s key contribution includes:Lossless data hiding,less filesize expansion in identical pay-load and higher embedding efficiency. | Yang Du Zhaoxia Yin Xinpeng Zhang | 2018 | Computers, Materials & Continua2018，，6： | 2 |
| 13 | Mechanisms of obesity-and diabetes mellitus-related pancreatic carcinogenesis:a comprehensive and systematic显示文摘Research on obesity-and diabetes mellitus(DM)-related carcinogenesis has expanded exponentially since these two diseases were recognized as important risk factors for cancers.The growing interest in this area is prominently actuated by the increasing obesity and DM prevalence,which is partially responsible for the slight but constant increase in pancreatic cancer(PC)occurrence.PC is a highly lethal malignancy characterized by its insidious symptoms,delayed diagnosis,and devastating prognosis.The intricate process of obesity and DM promoting pancreatic carcinogenesis involves their local impact on the pancreas and concurrent wholebody systemic changes that are suitable for cancer initiation.The main mechanisms involved in this process include the excessive accumulation of various nutrients and metabolites promoting carcinogenesis directly while also aggravating mutagenic and carcinogenic metabolic disorders by affecting multiple pathways.Detrimental alterations in gastrointestinal and sex hormone levels and microbiome dysfunction further compromise immunometabolic regulation and contribute to the establishment of an immunosuppressive tumor microenvironment(TME)for carcinogenesis,which can be exacerbated by several crucial pathophysiological processes and TME components,such as autophagy,endoplasmic reticulum stress,oxidative stress,epithelialmesenchymal transition,and exosome secretion.This review provides a comprehensive and critical analysis of the immunometabolic mechanisms of obesity-and DM-related pancreatic carcinogenesis and dissects how metabolic disorders impair anticancer immunity and influence pathophysiological processes to favor cancer initiation. | Rexiati Ruze Jianlu Song Xinpeng Yin Yuan Chen Ruiyuan Xu Chengcheng Wang Yupei Zhao | 2023 | Signal Transduction and Targeted Therapy2023，8，4： | 2 |
| 14 | Bayesian seismic inversion for estimating fluid content and fracture parameters in a gas-saturated fractured porous reservoir显示文摘Understanding the effects of in situ fluid content and fracture parameters on seismic characteristics is important for the subsurface exploration and production of fractured porous rocks. The ratio of normal-to-shear fracture compliance is typically utilized as a fluid indicator to evaluate anisotropy and identify fluids filling the fractures, but it represents an underdetermined problem because this fluid indicator varies as a function of both fracture geometry and fluid content. On the bases of anisotropic Gassmann's equation and linear-slip model, we suggest an anisotropic poroelasticity model for fractured porous reservoirs. By combining a perturbed stiffness matrix and asymptotic ray theory, we then construct a direct relationship between the PP-wave reflection coefficients and characteristic parameters of fluids(P-and S-wave moduli) and fractures(fracture quasi-weaknesses), thereby decoupling the effects of fluid and fracture properties on seismic reflection characterization.By incorporating fracture quasi-weakness parameters, we propose a novel parameterization method for elastic impedance variation with offset and azimuth(EIVOA). By incorporating wide-azimuth observable seismic reflection data with regularization constraints, we utilize Bayesian seismic inversion to estimate the fluid content and fracture parameters of fractured porous rocks. Tests on synthetic and real data demonstrate that fluid and fracture properties can be reasonably estimated directly from azimuthal seismic data and the proposed approach provides a reliable method for fluid identification and fracture characterization in a gas-saturated fractured porous reservoir. | Xinpeng PAN Guangzhi ZHANG | 2019 | Science China Earth Sciences2019，62，5： | 2 |
| 15 | Mechanism for nucleation and growth of electrochemical deposition of palladium(II) on a platinum electrode in hydrochloric acid solution显示文摘Palladium(II)and chloride ions tend to form complexes in aqueous solution.Both theoretical and experimental(by UV spectrum)results indicate that there are four complexes formed in aqueous solution containing 3 mol/L hydrochloric acid and 20mmol/L PdCl2.This work evaluates the kinetics of electrochemical deposition of palladium on a Platinum electrode.For this purpose,palladium electrodeposition was investigated by means of cyclic voltammetry(CV),potentiostatic current-time transients(CTTs)and Tafel curve.By CTTs curves,the regions corresponding to the charge transfer control,mixed control and diffusion control were identified.In the diffusion control region,palladium electrodeposition mechanism was characterized as progressive nucleation with three-dimensional(3D)growth under diffusion control;as for the mixed control region,an adsorption(IAds),ion transfer(IIT),and nucleation and growth(ING)model were proposed to analyze the current-time transients quantitatively,which could separate the IAds,IIT and ING perfectly. | GU Shuai WANG XinPeng WEI YueZhou FANG BaiZeng | 2014 | Science China Chemistry2014，57，5： | 2 |
| 16 | Environmental efficiency analysis of power industry in China based on an entropy SBM model显示文摘 | Yan Zhou Xinpeng Xing Kuangnan Fang Dapeng Liang Chunlin Xu | 2012 | Energy Policy2012，，： | 2 |
| 17 | Effect of TS-1 Treatment by Mixed Alkaline on Propylene Epoxidation显示文摘Titanium silicate-1(TS-1) was treated with a mixed alkaline of tetrapropyl ammonium hydroxide(TPAOH) and NaOH. It was characterized by XRD, nitrogen physical adsorption, SEM, FT-IR, UV-Vis and ICPOES, and studied in propylene epoxidation. The mixed alkaline treatment with TPAOH/NaOH solution did not destroy the MFI structure of TS-1. With increasing NaOH concentrations, the relative crystallinity and the framework titanium decreased to some extent while the mesopore volume, mesopore diameter, and extra-framework titanium increased appreciably. When NaOH concentration was 0.0333 mol L^(-1), the best catalytic performance was obtained. | Yaquan Wang Haoyang Li Wei Liu Yongjie Lin Xinpeng Han Zhao Wang | 2018 | Transactions of Tianjin University2018，24，1： | 2 |
| 18 | Construction and alignment control of the middle steel pylon of Taizhou Bridge显示文摘The general construction procedure of the steel middle pylon is briefly introduced. The alignment control of the pylon is carried out during the whole process of the construction. The control concept is extended to the manufacture stage. The manufacturing alignment error is strictly controlled in the segments precast process in factory, and the error is recognized and predicted precisely during the installation stage. The adjusting joints are employed to amend the accumulated error, which ensure that the steel pylon alignment could satisfy the precision requirements after installation. | Ji Lin You Xinpeng | 2011 | Engineering Sciences2011，9，2： | 2 |
| 19 | New cyclometalated transition-metal based photosensitizers for singlet oxygen generation and photodynamic therapy显示文摘The aim of this review article is to introduce recent studies on an emergent class of singlet oxygen photosensitizers of potential applications to the photodynamic therapy,with a primary focus on the cyclometalated transition-metal complexes.Singlet oxygen photosensitization performances of various cyclometalated Ir and Pt scaffolds are reviewed,and the general photophysical properties of relevant systems and the mechanisms of singlet oxygen production via photo-sensitization are also briefly discussed.Thus far,investigations of singlet oxygen sensitization by such Ir and Pt complexes are mainly carried out in organic solvents and under non-physiological conditions,while some research efforts have been made at examining the feasibility of applying pertinent cyclometalated complexes to photodynamic therapy. | xinpeng jiang ningbo zhu dahui zhao yuguo ma | 2016 | Science China Chemistry2016，59，1： | 2 |
| 20 | Have the Chinese provinces become integrated under reform显示文摘 | | 2002 | China Economic Review2002，，13： | 1 |
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