|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Joint TDOA, FDOA and differential Doppler rate estimation: Method and its performance analysis显示文摘Considering the estimation accuracy reduction of Frequency Difference of Arrival(FDOA) caused by relative Doppler companding, a joint Time Difference of Arrival(TDOA),FDOA and differential Doppler rate estimation method is proposed and its Cramer-Rao low bound is derived in this paper.Firstly, second-order ambiguity function is utilized to reduce the dimensionality and estimate initial TDOA and differential Doppler rate.Secondly, the TDOA estimation is updated and FDOA is obtained using cross ambiguity function, in which relative Doppler companding is compensated by the existing differential Doppler rate.Thirdly, differential Doppler rate estimation is updated using cross estimator.Theoretical analysis on estimation variance and Cramer-Rao low bound shows that the final estimation of TDOA, FDOA and differential Doppler rate performs well at both low and high signal–noise ratio, although the initial estimation accuracy of TDOA and differential Doppler rate is relatively poor under low signal–noise ratio conditions.Simulation results finally verify the theoretical analysis and show that the proposed method can overcome relative Doppler companding problem and performs well for all TDOA, FDOA and differential Doppler rate estimation. | Dexiu HU Zhen HUANG Shangyu ZHANG Jianhua LU | 2018 | Chinese Journal of Aeronautics2018，31，1： | 16 |
| 2 | Structure and Classification of Haemocytes in the Bivalve Mollusc Meretrix meretrix显示文摘光和电子显微镜的研究被执行以便在瓣鳃类软体动物 Meretrix meretrix 描绘 haemocytes。根据原子核和细胞质人物, haemocytes 的四种类型被认出:小粒的 haemocytes,淋巴的 haemocyte,大小粒、小的小粒的 haemocytes。Agranular hamocyte 是主要房间类型,为 75% 的财务。它是一与在细胞质的富有的细胞器小粒包括线粒体, golgi 身体 andendoplasmic 蜂窝胃。肝糖存款通常在这种房间类型被发现。淋巴的 haemocyte 的数字说明 1%-2% 。这种房间类型是一小粒并且显示出原子核的高比率到细胞质。一些细胞器被发现。有直径 of0.2 的高电子稠密的小粒 - 0.5 μ m 和富有的细胞器在小小粒的 haemocyte 被发现。这种房间类型的比例是大约 15% 。与 0.8 的直径电子稠密的高度的富有的小粒 - 2.4 μ m 在大小粒的 haemocyte 被发现。这种房间类型的比例是大约 10% ,并且细胞器的数量是最少。 | ZHANG Yanyan REN Sulian WANG Dexiu SONG Weibo | 2006 | Journal of Ocean University of China2006，5，2： | 4 |
| 3 | Arsenic concentration in peripheral blood is correlated with efficacy of a Traditional Chinese Medicine regimen containing realgar for the treatment of myelodysplastic syndromes显示文摘OBJECTIVE:To explore the relationship between the efficacy of realgar for the treatment of myelodysplastic syndromes with multilineage dysplasia(MDS-MLD)and arsenic concentration in the peripheral blood of patients.METHODS:In this prospective study,a total of 50 MDS-MLD patients were treated with traditional Chinese drugs containing realgar for 3 months in Xiyuan Hospital from March 2018 to January 2019.Routine blood examination as well as liver and kidney function were monitored before and after treatment.The concentration of arsenic in the peripheral blood was measured using an atomic fluorescence spectrometer after treatment.The correlation between clinical effect and arsenic concentration was analyzed by Spearman’s method.RESULTS:The treatment response rate was 54%.Two patients(4%)achieved complete remission,50%(25 of 50)showed hematologic improvement,and 23 patients had stable disease(23%).No disease progression was observed.Arsenic concentration in the peripheral blood ranged from 14.60 to 85.96μg/L.Clinical efficacy was positively correlated with arsenic concentration(P<0.05).The incidence of mild adverse reactions was 16%.CONCLUSION:A relatively high concentration of arsenic in the peripheral blood may improve the clinical efficacy of realgar in MDS-MLD patients. | WANG Dexiu XU Yonggang DU Yu WANG Hongzhi LI Liu HU Xiaomei YANG Xiupeng MA Rou ZHOU Qingbing | 2021 | Journal of Traditional Chinese Medicine2021，41，4： | 3 |
| 4 | Moving target localization for multistatic passive radar using delay, Doppler and Doppler rate measurements显示文摘Time delay and Doppler shift between the echo signal and the reference signal are two most commonly used measurements in target localization for the passive radar. Doppler rate, which can be obtained from the extended cross ambiguity function, offers an opportunity to further enhance the localization accuracy. This paper considers using the measurement Doppler rate in addition to measurements of time delay and Doppler shift to locate a moving target. A closed-form solution is developed to accurately and efficiently estimate the target position and velocity.The proposed solution establishes a pseudolinear set of equations by introducing some additional variables, imposes weighted least squares formulation to yield a rough estimate, and utilizes the function relation among the target location parameters and additional variables to improve the estimation accuracy. Theoretical covariance and Cramer-Rao lower bound(CRLB) are derived and compared, analytically indicating that the proposed solution attains the CRLB. Numerical simulations corroborate this analysis and demonstrate that the proposed solution outperforms existing methods. | ZHAO Yongsheng HU Dexiu ZHAO Yongjun LIU Zhixin | 2020 | Journal of Systems Engineering and Electronics2020，31，5： | 3 |
| 5 | Effect of sodium alginate on phosphorus recovery by vivianite precipitation显示文摘There are good prospects for phosphorus recovery from excess sludge by vivianite crystallization while a large number of extracellular polymeric substances in sludge will have impact on vivianite precipitation.In this study,as a representative of extracellular polymeric substance,the effect of sodium alginate(SA)on phosphorus recovery by vivianite precipitation under different initial SA concentrations(0–800 mg/L),p H values(6.5–9.0)and Fe/P molar ratios(1:1–2.4:1)was investigated using synthetic wastewater.The results showed that SA in low concentrations(≤400 mg/L)had little inhibitory effect on the phosphorus recovery rate.However,when the concentration of SA was larger than 400 mg/L,the phosphorus recovery rate decreased significantly with increasing SA concentrations.The inhibition rate of 800 mg/L SA was about 3 times as large as that of 400 mg/L SA.It was worth noting that the inhibitory effect of SA on vivianite precipitation decreased with increasing initial p H and Fe/P molar ratios.Additionally,SA has no obvious influence on the composition of products,but the morphology of harvested crystals was transformed from branches to plates or rods in uneven sizes. | Cong Zhang Dexiu Hu Ruijie Yang Zichen Liu | 2020 | Journal of Environmental Sciences2020，32，7： | 2 |
| 6 | Characterization of a Lacustrine Shale Reservoir and the Evolution of its Nanopores: A Case Study of the Upper Cretaceous Qingshankou Formation in the Songliao Basin, Northeastern China显示文摘The Songliao Basin is one of the most important petroliferous basins in northern China. With a recent gradual decline in conventional oil production in the basin, the exploration and development of unconventional resources are becoming increasingly urgent. The Qingshankou Formation consists of typical Upper Cretaceous continental strata, and represents a promising and practical replacement resource for shale oil in the Songliao Basin. Previous studies have shown that low-mature to mature Qingshankou shale mainly preserves type Ⅰ and type Ⅱ1 organic matter, with relatively high total organic carbon(TOC) content. It is estimated that there is a great potential to explore for shale oil resources in the Qingshankou Formation in this basin. However, not enough systematic research has been conducted on pore characteristics and their main controlling factors in this lacustrine shale reservoir. In this study, 19 Qingshankou shales from two wells drilled in the study area were tested and analyzed for mineral composition, pore distribution and feature evolution using Xray diffraction(XRD), scanning electron microscopy(SEM), low-pressure nitrogen gas adsorption(N2-GA), and thermal simulation experiments. The XRD results show that clay, quartz, and feldspar are the dominant mineral constituents of Qingshankou shale. The clay minerals are mostly illite/smectite mixed layers with a mean content of 83.5%, followed by illite, chlorite, and kaolinite. There are abundant deposits of clay-rich shale in the Qingshankou Formation in the study area, within which many mineral and organic matter pores were observed using SEM. Mineral pores contribute the most to shale porosity;specifically, clay mineral pores and carbonate pores comprise most of the mineral pores in the shale. Among the three types of organic matter pores, type B is more dominant the other two. Pores with diameters greater than 10 nm supply the main pore volume;most are half-open slits and wedge-shaped pores. The total pore volume had no obvious linear relationship with TOC content, but had some degree of positive correlation with the content of quartz + feldspar and clay minerals respectively. However, it was negatively correlated with carbonate mineral content. The specific surface area of the pores is negatively related to TOC content, average pore diameter, and carbonate mineral content. Moreover, it had a somewhat positive correlation with clay mineral content and no clear linear relationship with the content of quartz + feldspar. With increases in maturity, there was also an increase in the number of carbonate mineral dissolution pores and organic matter pores, average pore diameter, and pore volume, whereas there was a decrease in specific surface area of the pores. Generally, the Qingshankou shale is at a low-mature to mature stage with a TOC content of more than 1.0%, and could be as thick as 250 m in the study area. Pores with diameters of more than 10 nm are well-developed in the shale. This research illustrates that there are favorable conditions for shale oil occurrence and enrichment in the Qingshankou shale in the study area. | ZHANG Xu LIU Chenglin LI Bing WU Linqiang GUI Herong WANG Ziling ZHANG Zhihui LIANG Dexiu | 2020 | Acta Geologica Sinica(English Edition)2020，94，2： | 2 |
| 7 | A Cumulant-Based Adaptive Detection Technique for Optical Wireless Communication Over Strong Turbulence Channels显示文摘The optical wireless communication (OWC) is afading channel because of the effect of atmosphericattenuation. We introduce a cumulant-based adaptive detection technique to providehigh performance for OWC. The received signalof OWC over strong turbulence channels is assumedto be a mixture of K-distributed fading andGaussian distributed thermal noise. In order tomitigate the fading induced by turbulence, thedecision threshold-updating algorithm based onsecond and higher order cumulants is proposed,which is able to operate in an unknown turbulenceenvironment. The performance of the adaptiveprocessing scheme has been evaluated by meansof Monte Carlo simulations. It is shown that theproposed approach proves valuable for a limitednumber K of memory data. | Wang, Jin Huang, Dexiu Yuan, Xiuhua | 2008 | China Communications2008，5，1： | 2 |
| 8 | 显示文摘 | Guo Chongfeng Huang Dexiu Su Qiang | 2006 | Materials Science and Engineering B2006，130，： | 1 |
| 9 | Methods to improve the fluorescence intensity of CaS : Eu^2+ red-emitting phosphor for white LED显示文摘 | Guo Chongfeng Huang Dexiu Su Qiang | 2006 | Mater Sci Eng B2006，130，13： | 1 |
| 10 | PD - 1 protects against in- flammation and myocyte damage in T Cell - Mediated myocarditis 显示文摘 | Tarrio ML Grabie N Bu Dexiu | 2012 | Journal of Immunology2012，188，10： | 1 |
| 11 | Linear all-optical signal processing using silicon micro-ring resonators显示文摘硅微戒指的共鸣器(MRR ) 是谁的紧缩、万用的设备周期的频率反应能为大量应用被利用。在这份报纸,我们用硅 MRR 同样被动的过滤器在线性所有光的信号处理应用上考察我们的最近的工作。我们集中于象调整格式变换那样的应用,调音的微分阶段移动(DPSK ) 解调,直接调制的激光(数据管理语言) 的调整速度改进,和独轮脚踏车搏动产生。实现极化差异电路的可能性,减少标准硅 MRR 的极化依赖,在 DPSK 解调的特别例子上被说明。 | Yunhong DING Haiyan OU Jing XU Meng XIONG Yi AN Hao HU Michael GALILI Abel Lorences RIESGO Jorge SEOANE Kresten YVIND Leif Katsuo OXENLOWE Xinliang ZHANG Dexiu HUANG Christophe PEUCHERET | 2016 | Frontiers of Optoelectronics2016，9，3： | 1 |
| 12 | Impact of multipath interference on noise figure of fiber Raman amplitiers显示文摘 | MEI Jinjie LIU Deming HANG Dexiu | 2002 | Proc of SPIE2002，4905，： | 1 |
| 13 | A novel scheme for XGM wavelength conversion based on single-port coupled SOA显示文摘 | Huang Dexiu Sun Junqing | 2001 | Chinese Physics2001，10，2： | 1 |
| 14 | A prospective randomized trial comparing MVAC and CISCA chemotherapy for patients with metastatic urothelial tumors 显示文摘 | Logothetis CJ Dexius FH Finn L | 1990 | J Clin Oncol1990，8，： | 1 |
| 15 | Preparation of Y 2 O 2 S:Eu 3+ phosphors by a novel decomposition method显示文摘 | Chongfeng Guo Lin Luan Changhong Chen Dexiu Huang Qiang Su | 2007 | Materials Letters2007，，4： | 1 |
| 16 | Calculation of emittance of coating layer with the kubelka-munk theory and the Mie-scattering model显示文摘 | Liu Lingyun Gong Rongzhou Huang Dexiu | 2005 | J Opt Soc Am A2005，22，11： | 1 |
| 17 | Nonlinear pulse propagation in twin -core fiber显示文摘 | Dexiu Huang | 2001 | Chinese Physics2001，10，7： | 1 |
| 18 | Influence of randomly varying birefringence on dark soliton transmission and its suppression 显示文摘 | Huang Dexiu | 2001 | Microwave and Optical Technology Letters2001，29，2： | 1 |
| 19 | Methods to improve the fluorescence intensity of CaS:Eu 2+ red-emitting phosphor for white LED显示文摘 | Chongfeng Guo Dexiu Huang Qiang Su | 2006 | Materials Science & Engineering B2006，，1： | 1 |
| 20 | Switching and Self-Trapping of Two Coupled Bose–Einstein Condensates in Trap Potentials with a Localized Impurity显示文摘 | Hong Li Yongshan Cheng Dexiu Huang | 2005 | Journal of Low Temperature Physics (-)2005，，1： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员