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Geodesy and Geodynamics 2024年第2期15卷 189-199页

作者： juan A.García-Armenteros Center for Advanced Studies in Earth Sciences Energy and Environment(CEACTEMA)University of Jaén23071 JaenSpain

This paper analyzed GPS data from the Topo-Iberia network spanning almost 12 years(2008-2020).The data quality information for all 26 Topo-Iberia stations is provided for the first time,complementing the Spanish Geological Survey’s storage *** analyses based on quality indicators obtained using TEQC have been carried *** guidelines and data quality information from the IGS stations have been considered as the quality references,with the stations ALJI,EPCU,and TIOU standing out as the worst stations,while on the contrary,FUEN,PALM,PILA,and TRIA meet the quality requirements to become an IGS *** relationship between the GPS data quality and their GAMIT-and Gipsy X-derived postfit ionosphere-free phase residuals has also been investigated,and the results reveal an inversely proportional *** has been found that the stations showing an increase in elevation of the horizon line,also show an increase in cycle slips and multipath,are among the poorest quality stations,and among those with the highest postfit RMS of phase ***,the evolution of the vegetation around the antenna should be considered as it could cause a progressive loss of quality,which is not complying with the IGS *** quality assessment shows that the Topo-Iberia stations are appropriate for geodetic purposes,but permanent monitoring would be necessary to avoid the least possible loss of data and *** addition,a method to characterize the GNSS data quality is proposed.

关键词： GPS dataquality's effects IGS quality standard Postfit LC phase residual Qualityassessment Topo-Iberia CGPS network

Sleep quality of patients with postoperative glioma at home

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World Journal of Clinical Cases 2020年第20期8卷 4735-4742页

作者： Yang Huang Zi-juan Jiang juan Deng Yu-juan Qi Department of Neurosurgery The Affiliated Brain Hospital of Nanjing Medical UniversityNanjing 210029Jiangsu ProvinceChina

BACKGROUND The sleep quality of patients with postoperative glioma at home has not been reported *** this study,the sleep quality of postoperative glioma patients at home was explored through telephone *** To investigate the sleep quality of patients with postoperative *** Glioma patients who were treated and operated on at Nanjing Brain Hospital from May 2012 to August 2019 were selected as participants via convenience sampling.A total of 549 patients were recruited by telephone,and 358 of those patients responded to the Pittsburgh Sleep Quality Index(PSQI).RESULTS The total PSQI score was 5.19±3.39 in all patients with postoperative glioma,which was higher than that of the normal *** were 135 patients with poor sleep quality(PSQI>7),which accounted for 37.7%of all *** scores of the seven dimensions of the PSQI were sleep latency(1.22±1.05),sleep disturbance(1.12±0.98),subjective sleep quality(1.03±0.92),habitual sleep efficiency(1.02±0.91),daytime dysfunction(0.95±0.43),sleep persistence(0.83±0.76),and use of sleeping medication(0.25±0.24).The results showed that the subjective sleep quality of the patients who underwent an operation 1-2 years ago was worse than that of the patients who underwent an operation more than 2 years ago(P<0.05).Older patients had worse sleep latency and sleep duration scores than younger patients(P<0.05).Sleep disturbance and daytime dysfunction were worse in patients who received postoperative radiotherapy/chemotherapy(P<0.05).CONCLUSION The sleep quality of patients with postoperative glioma at home is worse than that of normal ***,difficulty falling asleep and sleep disorders are common complications among these patients,and age,postoperative duration,and postoperative chemoradiotherapy could affect sleep quality.

关键词： Sleep quality Postoperative Glioma patients Radiotherapy Chemotherapy Outcome

The Initial Mesoscale Vortexes Leading to the Formation of Tropical Cyclones in the Western North Pacific

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Advances in Atmospheric Sciences 2023年第5期40卷 804-823页

作者： Shenglan WU juan FANG Shanghai Central Meteorological Observatory CMAShanghai 200030China Key Laboratory of Mesoscale Severe Weather(MOE) School of the Atmospheric SciencesNanjing University163 Xianlin RoadNanjing 210046China

A statistical analysis of the initial vortexes leading to tropical cyclone(TC)formation in the western North Pacific(WNP)is conducted with the ECMWF ERA5 reanalysis data from 1999 to *** is found that TCs in the WNP basically originate from three kinds of vortexes,i.e.,a mid-level vortex(MV),a low-level vortex(LV),and a relatively deep vortex with notable vorticity in both the lower and middle troposphere(DV).Among them,LV and DV account for 47.9%and 24.2%of tropical cyclogenesis events,respectively,while only 27.9%of TCs develop from the MV,which is much lower than that which occurs in the North Atlantic and eastern *** a difference might be ascribed to the active monsoon systems in the WNP all year *** to the nearly upright structure of mid-level convergence in the early pre-genesis stage,TC genesis efficiency is the highest in *** with MV,LV generally takes a shorter time to intensify to a TC because of the higher humidity and the stronger low-level cyclonic circulation,which is related to air-sea interaction and boundary-layer *** examination of the relationship between tropical cyclogenesis and large-scale flow patterns indicate that the TC genesis events associated with LV are primarily related to the monsoon shear line,monsoon confluence region,and monsoon gyre,while those associated with MV are frequently connected with easterly waves and wave energy dispersion of preexisting *** with other flow patterns,tropical cyclones usually form and intensify faster in the monsoon confluence region.

关键词： TC formation initial mesoscale vortexes TC genesis efficiency large-scale flow patterns

Analysis of RF Feedback Chain Isolation in Wireless Co-Time Co-Frequency Full Duplex

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Journal of Electronic Science and Technology 2018年第3期16卷 280-286页

作者： juan Zhou Ying Shen Ya-juan Xue Li Li the College of Communication Engineering Chengdu University of Information Technology the National Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of China

By employing a radio frequency(RF) feedback chain, the self-interference can be canceled efficiently in co-time co-frequency full duplex(CCFD). However, the evitable signal crosstalk which is caused by the imperfect RF feedback chain isolation usually damages the self-interference cancelation(SIC) performance. To deal with this problem, firstly, we analyze the impact of RF feedback chain isolation on SIC performance. Then a digital preprocessing scheme with RF feedback chain is proposed in the multiple-antenna CCFD architecture. Using both analytical and experimental methods, we find that the proposed scheme achieves a better performance on SIC.

关键词： Co-time co-frequency full duplex full duplex radio frequency feedback chain isolation radio frequency leakage signal self-interference cancellation

Factors controlling the development of carbonate reservoirs of Ordovician Yingshan formation in the Gucheng area, Tarim Basin

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Energy Geoscience 2023年第3期4卷 18-25页

作者： juan He Exploration&Production Research Institute SINOPECBeijing102206China

Deep carbonate rocks are important targets for oil and gas exploration in China. In recent years, significant oil/gas discoveries have been made in the deep carbonate sequences in the Tarim, Sichuan, Ordos, and Bohai Bay basins. Despite significant oil/gas discoveries, large-scale exploration has not been conducted in the Gucheng area in the Tarim Basin. To break the bottleneck restricting the petroleum exploration in the Gucheng area, this study analyzed the factors controlling the formation of carbonate reservoirs of the Yingshan Formation in the Gucheng area in detail based on the basic geological conditions of the study area and the data from cores, thin sections, well logging, testing, and 3-D seismic survey. The inner shallow-ramp in the Gucheng area acts as the main sedimentary facies zone for the development of high-quality reservoirs. The grainstones formed in the high-energy environment of the inner shallow-ramp laid the foundation for subsequent reservoir development in the study area. The dolomitized shoal grainstones in the inner shallow-ramp have well-developed intercrystalline pores and intercrystalline dissolved pores due to later dolomitization, thus serving as high-quality reservoirs. Strike-slip faults are crucial to reservoir reformation and determine whether high production can be achieved in oil and gas exploitation in the study area. Moreover, later reformation by hydrothermal solutions also plays a constructive role in reservoir formation.

关键词： Inner shallow ramp Dolonitized shoal Strike-slip fault Hydrothermal process Yingshan Formation Tarim Basin

Reflected SPDEs Driven by Fractional Noises

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Acta Mathematicae Applicatae Sinica 2020年第2期36卷 347-360页

作者： juan YANG Qing ZHOU School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China

In this paper,we study the stochastic partial differential equation with two reflecting smooth walls h^1 and h^2,driven by a fractional noise,which is fractional in time and white in *** large deviation principle for the law of the solution to this equation,will be established through developing a classical ***,we obtain the H?lder continuity of the solution.

关键词： stochastic partial differential equations with two reflecting walls fractional Brownian motion large deviation principle Holder continuity

Kinetic study on desulfurization and denitrification using microwave irradiation over activated carbon

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Science China(Technological Sciences) 2011年第9期54卷 2321-2326页

作者： MA ShuangChen YAO juan juan JIN Xin ZHANG Bo School of Environment North China Electric Power University Baoding 071003 China

Sulfur dioxide （SO2） and nitrogen oxide （NOx） in flue gas can be removed by combining microwave induced catalysis and adsorption on activated carbon. The reaction mechanisms of desulfurization and denitrification by microwave irradiation were analyzed based on the measurement of reaction products. Thermodynamic parameters for desulfurization and denitrification by thermal-carbon reduction were predicted according to the principles of thermodynamics. The experimental results indicated that the desulfurization and denitrification reaction processes include three reaction stages： slow reaction zone, transitional zone and rapid reaction zone. In high temperature zone, activation energies for the reduction of SO2 and nitrogen monoxide （NO） are 30.69 and 24.06 kJ mo1-1, respectively. This study shows that microwave can effectively enhance the removal of pollutants through its heating effect and the induced catalysis.

关键词： microwave desulfurization denitrification kinetics

Two 8-node quadrilateral spline elements by B-net method

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Acta Mechanica Sinica 2012年第6期28卷 1620-1629页

作者： juan Chen Chong-Jun Li School of Mathematics and Quantitative Economics Dongbei University of Finance and Economics School of Mathematical Sciences Dalian University of Technology

Isoparametric quadrilateral elements are widely used in the finite element method, but the accuracy of the isoparametric quadrilateral elements will drop obviously deteriorate due to mesh distortions. Spline functions have some properties of simplicity and conformality. Two 8-node quadrilateral elements have been developed using the trian- gular area coordinates and the B-net method, which can ex- actly model the quadratic field for both convex and concave quadrangles. Some appropriate examples are employed to evaluate the performance of the proposed elements. The nu- merical results show that the two spline elements can obtain solutions which are highly accurate and insensitive to mesh distortions.

关键词： Spline finite element B-net method Quadri-lateral element - Bivariate spline interpolation The secondorder completeness

Fuzzy PID Control of Space Manipulator for Both Ground Alignment and Space Applications

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International Journal of Automation and computing 2014年第4期11卷 353-360页

作者： Fu-Cai Liu Li-Huan Liang juan-juan Gao Key Lab of Industrial Computer Control of Hebei Province Yanshan University

Considering gravity change from ground alignment to space applications, a fuzzy proportional-integral-differential(PID)control strategy is proposed to make the space manipulator track the desired trajectories in different gravity environments. The fuzzy PID controller is developed by combining the fuzzy approach with the PID control method, and the parameters of the PID controller can be adjusted on line based on the ability of the fuzzy controller. Simulations using the dynamic model of the space manipulator have shown the effectiveness of the algorithm in the trajectory tracking problem. Compared with the results of conventional PID control,the control performance of the fuzzy PID is more effective for manipulator trajectory control.

关键词： Space manipulator trajectory tracking ground alignment space applications fuzzy proportional-integral-differential (PID) gravity environment

Binding Capacity for Aflatoxin B_1 by Different Adsorbents

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Agricultural Sciences in China 2010年第3期9卷 449-456页

作者： LI juan-juan SUO De-cheng SU Xiao-ou Institute of Quality Standard and Testing Technology for Agro-Product Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China

In this article, in vitro adsorption of aflatoxin B1 （AFB1） onto different adsorbents was characterized and the result was verified by comparing the growth performance and serum protein levels of broilers exposed to aflatoxin-contamination feed. Main components of adsorbents selected were yeast cell extracts （Product A）, HSCAS （Product B）, and a mixture of yeast product and HSCAS （Product C）, respectively. A total of 240 broilers were assigned to eight treatments, and the effects of three types of adsorbents on growth performance and serum protein levels were evaluated. Results indicated that Product B had the highest in vitro affinity for AFB1, followed by Product C and Product A. Product B bound 97.69% of the AFB1 in solution in 10 min, and it remained over 96.03% in 60 min at pH 8.0. The B-AFB1 complex was much stronger than the other two complexes in vitro condition （P 〈 0.05）. Feed intake （FI） and average daily gain （ADG） decreased （P 〈 0.05） and feed gain ratio increased （P 〈0.05） in the treatment fed aflatoxin-contaminated feed versus treatment on the basal feed. Serum total protein （TP）, albumin （ALB）, and globulin （GLOB） levels were significantly decreased （P〈0.05）. Product B （0.15%） increased growth performance and improved serum protein levels, Product A and Product C were not as effective as Product B. Three adsorbents tested here had sufficient potential to AFBt in some extents and Product B could bind AFB1 more effectively than Product A and Product C. These results indicated that Product B could alleviate some of the AFBt toxic effect in broilers.

关键词： adsorbent AFB 1 absorption efficacy