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A long-term Global LAnd Surface Satellite(GLASS)data-set for environmental studies

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International Journal of Digital Earth 2013年第S01期6卷 5-33页

作者： Shunlin Liang Xiang Zhao Suhong Liu Wenping Yuan Xiao Cheng Zhiqiang Xiao Xiaotong Zhang Qiang Liu Jie Cheng Hairong tang Yonghua Qu Yancheng Bo Ying Qu huazhong Ren Kai Yu John Townshend The State Key Laboratory of Remote Sensing Science Jointly Sponsored by Beijing Normal University and Institute of Remote Sensing Applications of Chinese Academy of SciencesBeijingChina College of Global Change and Earth System Sciences Beijing Normal UniversityBeijingChina Department of Geographical Sciences University of MarylandMDUSA School of Geography Beijing Normal UniversityBeijingChina Institute of Electronics Chinese Academy of SciencesBeijingChina

Recently,five Global LAnd Surface Satellite(GLASS)products have been released:leaf area index(LAI),shortwave broadband albedo,longwave broadband emissivity,incident short radiation,and photosynthetically active radiation(PAR).The first three products cover the years 19822012(LAI)and 19812010(albedo and emissivity)at 15 km and 8-day resolutions,and the last two radiation products span the period 20082010 at 5 km and 3-h *** products have been evaluated and validated,and the preliminary results indicate that they are of higher quality and accuracy than the existing *** particular,the first three products have much longer time series,and are therefore highly suitable for various environmental *** paper outlines the algorithms,product characteristics,preliminary validation results,potential applications and some examples of initial analysis of these products.

关键词： earth observation global environmental change remote sensing

太阳能辅助600MW超临界供热机组的耦合方案

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华中科技大学学报(自然科学版) 2025年第1期53卷 129-135+164页

作者：余廷芳李龙飞方澳汤一村南昌大学先进制造学院

针对某600 MW超临界供热机组，提出了两种太阳能与该机组的耦合方案：方案1通过太阳能场热能取代高加抽气；方案2为取代供热抽气．采用Matlab建立了供热季节太阳能辅助600 MW超临界供热机组性能计算仿真模型，并对供热季内这两种耦合方... 详细信息

针对某600 MW超临界供热机组，提出了两种太阳能与该机组的耦合方案：方案1通过太阳能场热能取代高加抽气；方案2为取代供热抽气．采用Matlab建立了供热季节太阳能辅助600 MW超临界供热机组性能计算仿真模型，并对供热季内这两种耦合方案进行了性能计算分析比较．结果表明：方案1和2均能提升原供热机组的性能；在供热季额定抽气工况下，方案1和2的发电标准煤耗率分别为221.35和225.26 g/（kW·h），相比原供热机组分别降低了28.47和24.56 g/（kW·h）；方案1的光电转换效率为16.17%，比方案2高出2.63%；方案1和2的调峰范围提高了58.93%和83.33%．有效直接辐射强度235 W/m2是方案1和2的性能分界节点，据此提出了机组运行优化策略判据，制定了供热机组供热季节运行的优化运行策略，供热季按运行优化策略比方案1多节省煤134.54t，比方案2多节省212.37 t.

关键词：太阳能仿真耦合方案供热机组运行策略

TiO_2@MgO Core-Shell Film:Fabrication and Application to Dye-Sensitized Solar Cells

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Wuhan University Journal of Natural Sciences 2010年第4期15卷 325-329页

作者： LI Bihui, Lü Gang, LUO Lijuan, tang Yiwen Institute of Nano-Science and Technology, huazhong Normal University, Wuhan 430079, Hubei, China Institute of Nano-Science and Technology Huazhong Normal University Wuhan Hubei China

In this study,TiO2@MgO core-shell film was obtained by using a simple chemical bath deposition method to coat a thin MgO film around TiO2 nanoparticles. The core-shell configuration was characterized by X-ray diffractometer (XRD),scanning elec-tron microscopy (SEM),energy dispersive X-ray spectroscopy (EDX),and high-resolution transmission electron microscopy (HRTEM). Lattice fringes were observed for the TiO2 particles,and the MgO shell showed an amorphous structure,revealing a clear distinction between the core and shell materials. Applying the core-shell film as photoanode to the dye-sensitized solar cells (DSSCs),it shows a superior performance compared to the pure TiO2 electrode. Under the illumination of simulated sunlight (75 mW-cm-2),the short circuit photocurrent (Jsc),the open circuit photovoltage (Voc),and the fill factor (fF) are 8.80 mA-cm-2,646 mV,and 0.69,respectively,and the conversion efficiency (η) in-creased by 21.8% (from 4.32% to 5.26%) when dipping for opti-mum condition.

关键词： TiO2@MgO core-shell electrode dye-sensitized solar cell (DSSC)

Study on the Digital Manufacturing System of Ship Model Surface

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武汉理工大学学报 2006年第S2期28卷 547-551页

作者： ZHU Linsen tang Yangping BIN Hongzan FENG Qingxiu XIONG Zhengpeng (school of Mechanical Science and Engineering,huazhong University of Science and Technology,Wuhan 430074 China School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

Because a ship model surface (SMS) is a large double-curved 3-D surface,the machining efficiency of the cur- rent handcraft manufacturing method are very low,and the precision is difficult to control *** order to greatly improve the machining efficiency and precision of SMS,based on the CAD/CAM/CNC technology,this paper proposed a model of SMS digi- tal manufacturing system,which is composed of five functional modules (preprocess module,CAD module,CAM module,post- process module and CNC module),and a twin-skeg SMS as an example,the key technologies & design principle of the nodtules were investigated also Based on the above research works,the first set of 4-axis SMS Digital Manufacturing System in China has been successfully developed,which can reduce the machining time of the twin-skeg SMS from 30 working days needed for the cur- rent handcrafting manufacturing method to 8 hours now,and which can control more effectively the precision of SMS also.

关键词： ship engineering ship model surface(SMS) digital manufacturing CAD/CAM/CNC

Chemical reductive technologies for the debromination of polybrominated diphenyl ethers: A review

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Journal of Environmental Sciences 2023年第5期127卷 42-59页

作者： Ming Lei Yao tang Lihua Zhu Heqing tang College of Resources and Environmental Science South-Central Minzu UniversityWuhan 430074China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China

Polybrominated diphenyl ethers(PBDEs)are widely used as brominated flame retardants,which had attracted amounts of attention due to their harmful characteristics of high toxicity,environmental persistence and potential *** chemical reductive debromination technologies have been developed for the debromination of PBDEs,including photolysis,photocatalysis,electrocatalysis,zero-valent metal reduction,chemically catalytic reduction and mechanochemical *** review aims to provide information about the degradation thermodynamics and kinetics of PBDEs and summarize the degradation mechanisms in various *** to the comparative analysis,the rapid debromination to generate bromine-free products in an electron-transfer process,of which photocatalysis is a representative one,is found to be relatively difficult,because the degradation rate of PBDEs depended on the Br-rich phenyl ring with the lowest unoccupied molecular orbital(LUMO)*** the contrary,the complete debromination occurs easily in other systems with active hydrogen atoms as the main reactive species,such as chemically catalytic reduction *** review provides the knowledge on the chemical reductive technique of PBDEs,which would greatly help not only clarify the degradation mechanism but also design the more efficient system for the rapid and deep debromination of PBDEs in the future.

关键词： Polybrominated diphenyl ethers (PBDEs) Debromination Chemical reduction Electron transfer Hydrogenation

Cytology of 2n Pollen Formation in Nonastringent Persimmon

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Agricultural Sciences in China 2002年第6期1卷 680-683页

作者： tang Xian-ying and LUO Zheng-rong( College of Horticulture and Forestry, huazhong Agricultural University, Wuhan 430070 , P. R. China ) College of Horticulture and Forestry Huazhong Agricultural University Wuhan 430070 P. R. China

Cytological mechanisms of 2n pollen formation in ' Zenjimaru' nonastringent persimmon (Diospyros kaki L.f.) were studied. The following abnormalities in meiosis were found to be responsible for the production of 2n pollens: (1) disoriented spindles, including parallel, fused and tripolar spindles, were formed at metaphase II and anaphase II; (2) the nuclei at telophase II were arranged to two poles, each of which contained two nuclei, or to three poles, one of which contained two nuclei, the other two contained one nucleus respectively; (3) dyads and triads were produced at the tetrad stage. The dyad would develop into two 2n pollens, and the triad would develop into one 2n and two n pollens. The 2n pollens produced by this mechanism were genetically equivalent to FDR (first division restitution) gametes, thus providing a potential value for sexual polyploidization.

关键词： Nonastringent persimmon 2n pollen Meiosis

Centrophenoxine improves chronic cerebral ischemia induced cognitive deficit and neuronal degeneration in rats

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Acta Pharmacologica Sinica 2004年第12期25卷 24-30页

作者： Yun LIAO2, Rui WANG, Xi-can tang3 State KeyLaboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese AcademyofSciences, Shanghai 201203, China 2TongjiMedical College of huazhong Universityof Science & Technology, Wuhan 430030, China Tongji Medical College of huazhong University of Science & Technology Wuhan 430030 China

AIM: To study the effects of centrophenoxine (CPH, meclofenoxate) on chronic cerebral hypoperfusion induced deficits in rats. METHODS: Chronic hypoperfusion in rats was performed by permanent bilateral ligation of the common carotid arteries. Morris water maze was used to measure spatial memory performance. Spectrophoto- metrical techniques were used to assay SOD, GPx activities, MDA content, TXB2, and 6-keto-PGF1α levels. Mor- phological change was examined by HE staining. The expression of Bax and p53 protein were assayed by immuno- histochemistry analysis. RESULTS: Chronic hypoperfusion in rats resulted in spatial memory impairments shown by longer escape latency and shorter time spent in the target quadrant. These behavioral dysfunction were accom- panied by increase in SOD and GPx activities, the content of MDA, the levels of pro-inflammatory mediators (TXB2, 6-keto-PGF1α), overexpression of Bax and P53 protein, and delayed degeneration of neurons in cortex and hippocampus. Oral administration of CPH (100 mg/kg, once per day for 37 d) markedly improved the memory impairment, reduced the increase in antioxidant enzyme activities, MDA content and the levels of pro-inflammatory mediators to their normal levels, and attenuated neuronal damage. CONCLUSION: The abilities of CPH to attenu- ate memory deficits and neuronal damage after ischemia may be beneficial in cerebrovascular type dementia.

关键词： meclofenoxate brain ischemia free radicals maze learning TXB2 6-keto-PGF1α Bax protein p53 protein

Raman amplification of Stokes pulse in ultra-small silicon-on-insulator optical waveguide

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Optoelectronics Letters 2008年第1期4卷 12-14页

作者： WU Jian-wei, LUO Feng-guang, ZHANG Qing-tang, and HUANG Yong-jun Institute of Optoelectronics Science and Engineering and Wuhan National Laboratory for Optoelectronics, huazhong University of Science and Technology, Wuhan 430074, China Institute of Optoelectronics Science and Engineering and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan China

The stimulated Raman amplification of picosecond Stokes pulse is numerically investigated in ultra-small silicon-on- insulator optical waveguide. Numerical results show that we obtain the gain of up to 30-dB for weak Stokes pulse in the co- propagation configuration for 10 mm Jength waveguide using high intensity pump optical pulse. The peak gain, pulse width, rise time, and fall time of Stokes pulse will experience the variation course of decaying then increasing with increas- ing waveguide length. The time delay of output Stokes pulse is controlled by adjusting the initial time delay of both pump and Stokes pulses.

关键词：光波导拉曼放大率绝缘体硅斯托克斯脉冲

Controlled Growth of ZnO Array on FTO Glass Substrate by Electrodeposition

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Wuhan University Journal of Natural Sciences 2010年第2期15卷 130-134页

作者： LUO Lijuan, Lü Gang, LI Bihui, CHEN Zhenghua, tang Yiwen Institute of Nano-Science and Technology, huazhong Normal University, Wuhan 430079, Hubei, China Institute of Nano-Science and Technology Huazhong Normal University Wuhan China

In this study, ZnO nanotube and nanorod array films were respectively synthesized directly on F-doped Sn02 glass substrate （FTO） using a direct electrodeposition from a simple aqueous zinc salt solution. The effects of potential value, electro- deposition mode and solution stirring speed on the product morphology were investigated. Controlling the reaction under potentiostatic condition of-0.7 V at stirring speed of 300 r/min, large-scale nanotube arrays perpendicular to the substrate can be synthesized at a low temperature of 70℃. By varying the reaction parameters, we can also obtain ZnO nanorod arrays. The results of X-ray diffraction, scanning electron microscopy, transmission electron microscopy and high-resolution transmission electron microscopy have been provided to characterize the structure and morphology of the nanotube and nanorod arrays. Experiment results show that the as-obtained ZnO has a single crystalline structure and c-axis oriented direction. The room-temperature photoluminescence spectrum of the ZnO nanotube array film displayed its high crystal property available as a photonic material. Electrodeposition is an effective method to prepare ZnO nanotube array films in quantity.

关键词： electrodeposition ZnO nanotubes nanorods array