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Model-based variational fusion for reducing spectral distortion

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Science China(Information Sciences) 2018年第1期61卷 267-269页

作者： Zeming ZHOU Chaoqian CHEN yong meng Biao HU Institute of Meteorology and Oceanography PLA University of Science and Technology

High-resolution remote sensing satellites such as IKONOS,Quick Bird,and Geo Eye-1 usually provide a panchromatic(PAN)band and four multispectral(MS)*** sharpening is the synthesis of MS images of high spatial and spectral resolution with the spatial detail extracted from PAN *** this article,we present a model-based variational method for reducing the

关键词： IKONOS MS TVR IHS

Geological characteristics of the Sizhuang gold deposit in the region of Jiaodong, Shandong Province——A study on tectono-geochemical ore prospecting of ore deposits

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Chinese Journal Of Geochemistry 2011年第4期30卷 539-553页

作者： QIAN Jianping CHEN Hongyi meng yong College of Earth Sciences Guilin University of Technology Guangxi Guilin 541004 China

Tectono-geochemical samples were systematically collected from 5 drillcores along the No. 304 explora-tion line and at the -310 m level under the pit in the mining area, totalling 705 samples from the metamorphic rocks, granites, altered rocks and orebodies, and were determined for their contents of 20 kinds of elements including Au, Ag, As, Sb, Hg, Cu,,Pb, Zn, Sn, Bi, Mo, Co, Ni, Mn, Cr, V, Ti, Ba, Rb, Sr, etc. By using the Surfer software the geochemical exploration line profile maps for the 20 kinds of elements and the curves for the element geochemical contents of individual ore vein groups were established. In conbination with the geochemical map analytical method and Gregorian's zoning index calculation method, the vertical, longitudinal and lateral zonation sequences of the elements were ascertained and the geochemical three-dimentional zonation model of the primary halos was estab-lished on the basis of the analysis of metallogenic structures and alteration zonation. Coupled with the results of analysis of the geology and geochemistry data, it may be concluded that the process of alteration of granites in the mining area is also accompanied with the process of gold enrichment and mineralization. With the intensification of alteration of granites from granite →potash feldspathization granite →sericite-quartz alteration granite, seric-ite-quartz rocks →beresitized granite, pyrite sericite-quartz rock, silicified granite →gold ore, the contents of thio-phile ore-forming elements such as Au, Ag, As, Cu, Bi, Mo, Pb, Sb, Hg, and Sn tended to increase. Factor analysis of trace elements indicated: factor F2 (Au, Ag, Cu, Sn, As) represents the element association brought in at the main stage of hydrothermal metallogenesis; factor F4 (Bi, Sb) and factor F5 (Pb, Zn) represent the ore-forming element association supperposed during the late stage of Au-bearing sulfides. By using the Gregorian's zoning index and map analysis method we have ascertained the primary halo axi

关键词：构造地球化学金矿床金矿石地质特征矿床勘探胶东地区元素地球化学矿化蚀变分带

Novel technology of electroless Ni-W-P on plastics and its interface behavior

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中国有色金属学会会刊：英文版 2004年第z1期14卷 136-139页

作者： WANG Tian-xu HU yong-jun meng Ji-long College of Mechanical Engineering South China University of TechnologyGuangzhou 510641 China College of Mechanical Engineering South China University of TechnologyGuangzhou 510641 China College of Mechanical Engineering South China University of TechnologyGuangzhou 510641 China

The electroless Ni-W-P coatings on polyoxymethylene(POM) were prepared. The POM was pretreated by hot spraying Al powder on it. Before the electroless Ni-W-P deposition, the POM with Al coating was flash plated in alkaline bath. The mechanism of Ni-W-P deposition was studied and the technology was optimized. The XRD analysis shows that the "as-deposited" Ni-W-P plating has mixed crystalline structure. The hardness value of deposits is more than HV700. The abrasion resistance of deposits is six times more than that of POM. Bending test was used to determine the cohesion between the deposits and the substrates. SEM was used to study the behavior of surface abrasion and interface bonding condition. The reason for the excellent cohesion was interpreted.

关键词： plastics electroless plating interface Ni alloy

Effects of cooling rate and Al on MnS formation in medium-carbon non-quenched and tempered steels

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International Journal of Minerals,Metallurgy and Materials 2015年第6期22卷 589-597页

作者： meng-long Li Fu-ming Wang Chang-rong Li Zhan-bing Yang Qing-yong meng and Su-fen Tao State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Metallurgical and Ecological Engineering University of Science and Technology Beijing School of Materials Science and Engineering University of Science and Technology Beijing

The effect of Al on the morphology of MnS in medium-carbon non-quenched and tempered steel was investigated at three different cooling rates of 0.24, 0.43, and 200°C·s^-1. The formation mechanisms of three types of MnS were elucidated based on phase diagram information combined with crystal growth models. The morphology of MnS is governed by the precipitation mode and the growth conditions. A monotectic reaction and subsequent fast solidification lead to globular Type I MnS. Type II MnS inclusions with different morphological characteristics form as a result of a eutectic reaction followed by the growth in the Fe matrix. Type III MnS presents a divorced eutectic morphology. At the cooling rate of 0.24°C·s^-1, the precipitation of dispersed Type III MnS is significantly enhanced by the addition of 0.044wt% acid-soluble Al（Als）, while Type II MnS clusters prefer to form in steels with either 0.034wt% or 0.052wt% Als. At the relatively higher cooling rates of 200°C·s^-1 and 0.43°C·s^-1, the formation of Type I and Type II MnS inclusions is promoted, and the influence of Al is negligible. The results of this work are expected to be employed in practice to improve the mechanical properties of non-quenched and tempered steels.

关键词： medium carbon steels cooling rate aluminum content manganese sulfide formation mechanisms

Enhanced metastasis in RNF13 knockout mice s mediated by a reduction in GM-CSF levels

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Protein & Cell 2015年第10期6卷 746-756页

作者： He Cheng Aodi Wang Jiao meng yong Zhang Dahai Zhu The National Laboratory of Medical Molecular Biology Institute of Basic Medical Sciences Chinese Academy of MedicalSciences and School of Basic Medicine Peking Union Medical College Beijing 100005 China

RING finger protein 13 （RNF13） is a novel E3 ubiquitin ligase whose expression is associated with cancer development. However, its specific role in cancer progression and metastasis remains unclear. Here, a B16F10/LLC experimental pulmonary metastatic model was developed to examine the formation of metastatic foci in the lung. A greater number of tumor colonies were observed in the lungs of RNF13-knockout （KO） mice than in their wild-type （WT） littermates, whereas no significant differences in tumor size were observed between the two groups. In short-term experiments, the number of fluorescently-labeled B16F10 cells increased remarkably in RNF13-KO lungs at early time points, whereas clearance of tumor cells from the blood was not affected. These results indicated that RNF13 may inhibit the colonization of B16F10 cells in the lung. Assessment of the concentration of various cytokines in tumor bearing lungs and blood did not detect significant dif- ferences between the blood of RNF13-KO and WT mice; however the levels of GM-CSF were significantly reduced in RNF13-KO tumor bearing lungs, which may have guided more B16F10 cells to migrate to the lungs. This was confirmed by lower GM-CSF concentrations in conditioned media from the culture of RNF13-KO lung slices. Collectively, our results suggest that host RNF13 affects the concentration of GM-CSF in tumor-bearing lungs, leading to a reduction in the colonization of metastatic tumor cells in the lung.

关键词： RNF13 metastasis GM-CSF lung cancer

FLUID CHARACTERISTICS OF ROTARY WING HEAT METER WITH SINGLE-CHANNEL

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Journal of Hydrodynamics 2008年第1期20卷 101-107页

作者： Du Guang-sheng Liu Zheng-gang LI Li LIU yong-hui MA yong-kun meng Liang School of Energy and Power Engineering Shandong University Jinan 250061China

Fluid characteristics of a rotary wing heat meter with single-channel were studied through theretical analysis, numerical simulation and experiments. The obtained results show that the number of vanes can obviously influence the heat meter, but the water temperature seldom influence the meter , and the optimal number of vane is 6-8.

关键词： heat meter numerical simulation meter

Effect of anti-VEGF treatment on nonperfusion areas in ischemic retinopathy

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International Journal of Ophthalmology(English edition) 2021年第11期14卷 1647-1652页

作者： Zi-Yi Zhu yong-an meng Bin Yan Jing Luo Department of Ophthalmology the Second Xiangya HospitalCentral South UniversityChangsha 410011Hunan ProvinceChina Hunan Clinical Research Center of Ophthalmic Disease Changsha 410011Hunan ProvinceChina

In recent years,retinal ischemia such as that which occurs in diabetic retinopathy(DR)and retinal vein occlusion(RVO)has become a hotspot of ischemic retinopathy *** levels of vascular endothelial growth factor(VEGF)are recognized as a major cause of macular edema(ME)in DR and *** concentrations of VEGF in the vitreous can lead to serious retinal ischemia and hypoxia and form retinal nonperfusion areas(NPAs).Different levels of retinal ischemia can represent disease severity and ***-VEGF therapy as the first-line treatment for ME has been found to be effective in improving vision,but there are still disputes about whether anti-VEGF therapy could improve retinal ischemia and achieve reper fusion of previously developed retinal ***,we review and summarize studies of the effects of anti-VEGF drugs on retinal ischemia,especially NPAs.

关键词： anti-vascular endothelial growth factor retinal nonperfusion areas ischemic retinopathy macular ischemia

Root stoichiometric dynamics and homeostasis of invasive species Phyllostachys edulis and native species Cunninghamia lanceolata in a subtropical forest in China

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Journal of Forestry Research 2021年第5期32卷 2001-2010页

作者： Chao Peng Jia Tu Ming Yang yong meng Meiqun Li Wensheng Ai Institute of Bamboo Research Hunan Academy of ForestryChangsha 410004Hunan ProvinceP.R.China

The community species abundance and diversity declined with bamboo invasion had been widely reported ***,the physiological strategies used during root competition between native species and invasive bamboo are poorly *** clarify the mechanisms underlying such strategies,the stoichiometric dynamics and homeostasis of nitrogen,phosphorus,organic carbon in root orders of Phyllostachys edulis(I du[=Ⅰ-Pe,years 1 and 2];Ⅱdu[=Ⅱ-Pe,years 3 and 4]),Cunninghamia lanceolata in transition and pure forests were *** increasing intensity of bamboo invasion,N,P,and C content of *** root orders declined,N and P content in *** rhizome orders declined,while C increased,the stoichiometric ratios in mixed forest interface mainly increased,and the stoichiometric differences within native and invasive species root orders ***,the stoichiometric homeostasis index(H)of elements in the same root order and even the same elements in different root orders were not consistent.H of most root orders(except some HP)was greater than 4,the H ranked order wasⅠ-Pe>Cl>Ⅱ-Pe in mixed interfaces,and the N:P ratio of most species root orders was greater than 16,despite being affected by *** research concluded that the bamboo invasion narrows stoichiometric differences within root orders,and the juvenile bamboo rhizome has a stronger capacity for homeostatic regulation than in adult bamboo and ***,which is a key determinant of bamboo invasion success.

关键词： Bamboo invasion Root orders Nutrient dynamics Homeostatic regulation coefficient

Synthesis and mesomorphic properties of novel tolane-type liquid crystals

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Chinese Chemical Letters 2009年第11期20卷 1283-1286页

作者： Dong Yu Zhao Qing yong meng Xiao Peng Cui Huai Yang Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Two series of novel tolane-type liquid crystals （LCs） comprising of hydrogen-bonded organic acids were synthesized. The formation of dimerized H-bond LCs was confirmed by IR spectroscopy, and mesomorphic properties of the LCs were investigated by differential scanning calorimetry （DSC） and polarizing optical microscopy （POM）. It was found that the end groups of the liquid crystals as well as the unsaturated rigid core had effect on the mesomorphic properties.

关键词： Tolane Hydrogen-bonded liquid crystal Mesomorphic properties Synthesis