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Integrating ASTER and GLASS broadband emissivity products using a multi-resolution Kalman filter

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International Journal of Digital Earth 2016年第11期9卷 1098-1116页

作者： Linpeng Shi Shunlin Liang jie cheng Quan Zhang State Key Laboratory of Remote Sensing Science School of GeographyBeijing Normal UniversityBeijingPeople’s Republic of China Department of Geographical Sciences University of MarylandCollege ParkMDUSA

In this study,the multi-resolution Kalman filter(MKF)algorithm,which can handle multi-resolution problems with high computational efficiency,was used to blend two emissivity products:the Global LAnd Surface Satellite(GLASS)(BBE)product and the Advanced Spaceborne Thermal Emission and Reflection Radiometer(ASTER)narrowband emissivity(NBE)*** ASTER NBE product was first converted into a BBE product.A new detrending method was used to transfer the BBEs into a process suitable for the *** new detrending method was superior to the two existing ***,both the de-trended GLASS and ASTER BBE products were incorporated into the MKF framework to obtain the optimal estimation at each *** measurements collected in North America were used to validate the integrated ***,the fusion map showed good continuity,with the exception of the border areas,and the quality of the fusion map was better than that of the original *** validation results indicate that the MKF improved the BBE product accuracy at the coarse *** addition,the MKF was capable of recovering missing pixels at a finer scale.

关键词： Earth observation broadband emissivity MKF optimal interpolation data fusion GLASS MODIS ASTER

Kinetics of microwave-enhanced oxidation of phenol by hydrogen peroxide

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Frontiers of Environmental Science & Engineering 2011年第1期5卷 57-64页

作者： Deming ZHAO jie cheng Michael R.HOFFMANN College of Chemical Engineering and Materials Science Zhejiang University of TechnologyHangzhou 310032China W.M.Keck Laboratories California Institute of TechnologyPasadenaCA 91125USA

Aqueous solutions of phenol were oxidized by hydrogen peroxide assisted by microwave(MW)irradiation.A simple kinetic model for the overall degradation of phenol in the presence of excess H_(2)O_(2) is proposed in which the degradation rate of phenol is expressed as a linear function of the concentrations of phenol and H_(2)O_(2).A detailed parametric study showed that the degradation rate of phenol increased with increasing[H_(2)O_(2)]until saturation was *** degradation followed apparent zero-order kinetics under MW radiation or H_(2)O_(2) ***,after 90 min of irradiation,the observed kinetics shifted to pseudo first *** overall reaction rates were significantly enhanced in the combined MW/H_(2)O_(2) system,mainly because microwave could accelerate H_(2)O_(2) to generate hydroxyl radical(·OH)and other reactive oxygen *** observed synergetic effects of the MW/H_(2)O_(2) process resulted in an increased in the net reaction rate by a factor of *** hydrogen peroxide is present in a large stoichiometric excess,the time required to achieve complete mineralization is reduced significantly.

关键词： microwave(MW)irradiation hydrogen peroxide phenol synergetic effects kinetic model

Oscillatory hyper Hilbert transforms along curves

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Applied Mathematics(A Journal of Chinese Universities) 2009年第3期24卷 336-342页

作者： CHEN jie-cheng FAN Da-shan WANG Meng Dept. of Math. Zhejiang University Hangzhou 310027 China Dept. of Mathematical Sciences University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201

The hyper Hilbert transform Tnf（x） =∫-1^1 f（x - Γ（t））e^-i｜t｜-β｜t｜^-1-αdt along an appropriate curve Γ（t） on R^n is investigated,where β 〉 α 〉 *** L^p boundedness theorem of T4 is obtained,which is... 详细信息

关键词： hyper Hilbert transform curve

一种新型双曲弧面海堤护坡结构防潮消能效果的数值模拟研究

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水电能源科学 2024年第8期42卷 187-191页

作者：秦鹏李杰成徐欣悦周晔凯陈锴锋罗清清陶杰晖浙江水利水电学院水利与环境工程学院浙江杭州310018 浙江省农村水利水电资源配置与调控关键技术重点实验室浙江杭州310018 河海大学水利水电学院江苏南京210098

发展新型护坡结构对提高海堤工程结构强度,降低失事风险具有重要意义。为得到一种新型海堤护坡结构的更加准确的试验数据,基于Flow-3D软件对双曲弧面海堤护坡结构进行水动力数值模拟试验,并从消能防潮效果和压强分布特征等角度与传统海... 详细信息

发展新型护坡结构对提高海堤工程结构强度,降低失事风险具有重要意义。为得到一种新型海堤护坡结构的更加准确的试验数据,基于Flow-3D软件对双曲弧面海堤护坡结构进行水动力数值模拟试验,并从消能防潮效果和压强分布特征等角度与传统海堤护坡结构进行对比分析。计算结果进一步验证了新型海堤护坡结构的导流消能效果,证明其能在中、高流速涌浪冲击下有效提高越浪高度,形成较好的潮涌景观效果,同时还明晰了新型双曲海堤护坡的结构安全薄弱区域。研究成果为复杂水流条件下新型海堤护坡结构的应用及推广提供了理论及数据支撑。

关键词：双曲弧面海堤护坡防潮消能 Flow-3D 数值模拟

Multiple parametric Marcinkiewicz integrals with mixed homogeneity along surfaces

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Applied Mathematics(A Journal of Chinese Universities) 2023年第3期38卷 413-428页

作者： SHEN Jia-wei HE Shao-yong CHEN jie-cheng Department of Mathematics Zhejiang Normal UniversityJinhua 321004China Department of Mathematics Huzhou UniversityHuzhou 313000China.

In this paper, the multiple parametric Marcinkiewicz integral operators with mixed homogeneity along surfaces are studied. The Lp-mapping properties for such operators are obtained under the rather weakened size conditions on the integral kernels both on the unit sphere and in the radial direction. The main results essentially improve and extend certain previous results.

关键词： parametric Marcinkiewicz integrals rough kernels mixed homogeneity product spaces

Approximation of the Fractional Schrodinger Propagator on Compact Manifolds

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Acta Mathematica Sinica,English Series 2021年第10期37卷 1485-1496页

作者： jie cheng CHEN Da Shan FAN Fa You ZHAO Department of Mathematics Zhejiang Normal UniversityJinhua 321000P.R.China Department of Mathematical Sciences University of Wisconsin–MilwaukeeMilwaukeeWI 53201USA Department of Mathematics Shanghai UniversityShanghai 200444P.R.China

Let L be a second order positive,elliptic differential operator that is self-adjoint with respect to some C^(∞)density dx on a compact connected manifold *** proved that if 00.

关键词： Schrodinger propagator almost everywhere convergence compact manifolds

Numerical simulation of coupling heat transfer and thermal stress for spent fuel dry storage cask with different power distribution and tilt angles

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Nuclear Science and Techniques 2023年第2期34卷 109-127页

作者： Wei‑Hao Ji Jian‑jie cheng Han‑Zhong Tao Wei Li College of Urban Construction Nanjing Tech UniversityNanjing 211800China School of Energy Science and Engineering Nanjing Tech UniversityNanjing 211800China

Dry storage containers must be secured and reliable during long-term storage,and the effect of decay heat released from the internal spent fuel on the cask has become an important research *** this paper,a 3D computational fluid dynamics model is presented,and the accuracy of the calculation is verified,with computational errors of less than 6.2%.The thermal stress of the dry storage cask was estimated by coupling it with a transient temperature *** total power remained constant and adjusting the power ratio of the inner and outer zones had a small effect on the stress results,with a maximum equivalent stress of approximately 5.2 kPa,which occurred at the lower edge of the *** the case of tilt,the temperature gradient varied in a wavy distribution,and the wave crest moved from right to *** the tilt angle affects the air distribution in the annular gap,leading to the shell temperature being transformed,with a maximum equivalent stress of 202 MPa at the bottom of the ***,the equivalent stress in both cases was less than the yield stress(205 MPa).

关键词： Thermal stress CFD simulation Spent nuclear fuel Dry storage cask

敲低TROAP基因对胆管癌细胞系增殖和迁移能力的影响

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中国医药导刊 2024年第3期26卷 285-290页

作者：赵晋江郭伟梁少华程杰长治医学院附属和济医院山西长治046000

目的:探究Trophinin相关蛋白(Trophinin-associated protein,TROAP)基因沉默对人胆管癌细胞系RBE细胞增殖和迁移能力的影响。方法:培养人胆管癌细胞系RBE,并对其分别转染阴性对照序列和TROAP干扰序列,分别命名为si-NC组和siTROAP组。采... 详细信息

目的:探究Trophinin相关蛋白(Trophinin-associated protein,TROAP)基因沉默对人胆管癌细胞系RBE细胞增殖和迁移能力的影响。方法:培养人胆管癌细胞系RBE,并对其分别转染阴性对照序列和TROAP干扰序列,分别命名为si-NC组和siTROAP组。采用细胞计数试剂盒(CCK-8)和平板克隆形成实验检测细胞增殖能力;流式细胞术检测细胞凋亡率;细胞划痕实验和Transwell法检测细胞迁移和侵袭能力;蛋白质印迹实验(Western blot)检测RBE细胞中上皮间充质化(EMT)相关蛋白E-cadherin、N-cadherin,PCNA以及凋亡相关蛋白Bcl-2、Bax和caspase-3的相对表达量。结果:与si-NC组细胞相比,si-TROAP组细胞增殖率降低,克隆个数降低,细胞凋亡率升高,迁移和侵袭能力降低(P<0.05)。与si-NC组细胞相比,si-TROAP组细胞E-cadherin蛋白相对表达水平升高,N-cadherin蛋白相对表达水平降低,Bax和caspase-3蛋白相对表达水平升高,Bcl-2和PCNA蛋白相对表达水平降低(P<0.05)。结论:TROAP基因是RBE细胞潜在的致癌基因,TROAP基因沉默可降低人胆管癌细胞系RBE细胞增殖和迁移能力,并通过缓解上皮间质转化来发挥效应。

关键词：胆管癌 Trophinin相关蛋白迁移增殖上皮间质转化

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基于知识网络的全科医学文献研究趋势分析

中国病案 2024年第2期25卷 37-40页

作者：程洁郭慧鑫梁金凤首都医科大学附属北京朝阳医院北京市100020

目的分析全科医学研究文献的研究热点、趋势演化,为全科医学发展提供数据依据。方法系统检索中国期刊全文数据库中建库1990年1月1日-2023年2月28日,主题词为“全科医学”的相关文献,进行总结、分析、归纳。结果全科医学研究文献数量... 详细信息

目的分析全科医学研究文献的研究热点、趋势演化,为全科医学发展提供数据依据。方法系统检索中国期刊全文数据库中建库1990年1月1日-2023年2月28日,主题词为“全科医学”的相关文献,进行总结、分析、归纳。结果全科医学研究文献数量变化为1990年至2019年,文献波动上升到达高峰,从2019年开始至2022年,文献数量有回落的趋势。关键词共现网络包含了420个节点和2092条边,网络密度为0.0268,网络中包含的关键词占全部样本数的97%,代表性较强。词频占比前三位分别为全科医学占比14.85%,全科医师4.43%,全科医学教育3.30%。筛选出突变词51个。按照热点开始时间进行分类,2000年以前的研究热点主要集中在社区卫生服务突现强度63.58。2000年至2015年的研究热点集中在全科医学教育突现强度21.16。2015年之后的研究热点集中在全科医学科突现强度16.65,规范化培训突现强度15.75,截止在2023年尚未结束的突变词按照突现强度排序为:全科医学科突现强度16.65,规范化培训突现强度15.75,新型冠状病毒肺炎突现强度11.18。结论全科医学研究热点逐步从基层医疗卫生服务体系的全科医学能力、全科医学教育转向追求全科医学的质量发展,研究热点与国家相关政策联系紧密。

关键词：全科医学全科医师共现分析主题提取突发性检测