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Morphological evolution of CdS films prepared by chemical bath deposition

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Rare Metals 2013年第4期32卷 380-389页

作者： Xing-yu Peng Hong-Wei Gu Teng Zhang Fei Qu fa-Zhu Ding Hong-Yan Wang Key Laboratory of Applied Superconductivity Institute of Electrical Engineering Chinese Academy of Sciences

In this article, the growth process of chemical bath deposited CdS films was systematically investigated. The structural, optical, and morphological properties were investigated by X-ray diffraction （XRD）, transmission electron microscope （TEM）, UV-Vis spectrophotometer, scanning electron microscope （SEM）, respectively. CdS nanocubes with size of less than 500 nm and nanocrystal-lites with diameter of less than 5 nm forming in reaction solution are observed. According to the TEM results and the SEM morphological evolution of CdS films, a crystal-lite-by-crystallite growth mechanism is proposed to eluci-date the growth process of chemical bath deposited CdS films based on the present growth mechanism.

关键词： CdS Chemical bath deposition Growthmechanism Crystallite-by-crystallite

Seismic evidence for the existence of an entrained mantle flow coupling the northward advancing Indian plate under Tibet

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Earth and Planetary Physics 2019年第1期3卷 62-68页

作者： yu Zou XiaoBo Tian YouQiang yu fa-Bin Pan LingLing Wang XiaoBo He Department of Marine Sciences Zhejiang University State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences School of Ocean and Earth Science Tongji University State Key Laboratory of Geological Process and Mineral Resources China University of Geosciences

The Tibetan Plateau, known as "the roof of the world" and "the third pole of the earth", is a product of the collision between India and Asia during the last ～50 *** regional tectonics–in particular, growth and expansion of the plateau–has been attributed primarily to deformation within the *** role and pattern of the underlying asthenospheric flow, however, remain mostly *** light of recent seismic tomographic images and published seismic anisotropic descriptions of the upper mantle, here we propose that an entrained mantle flow is likely to exist under Tibet, induced by the northward advancing Indian *** direction of mantle flow is characterized by a gradual rotation from northward in the south to eastward in the north as a result of deflection by the deep root of the Tarim *** presence of an underlying mantle flow is not only able to account for the west-east oriented fast-axis of seismic anisotropy in northern Tibet, but can also adequately explain the sporadic null splitting in southern ***, the null splitting results, at least in part, from upwellings of asthenospheric flow through tears of the underthrusting Indian plate that have been revealed by various seismic *** mantle flow may in turn promote the block extrusion under Tibet that has been observed in GPS measurements; hot asthenospheric upwellings may also lead to widespread post-collisional magmatism in southern Tibet.

关键词： Tibet seismic anisotropy mantle flow null splitting upwelling

High-performance lens antenna using high refractive index metamaterials

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Chinese Physics B 2018年第8期27卷 559-565页

作者： Lai-Jun Wang Qiao-Hong Chen fa-Long yu Xi Gao School of Information and Communication Guilin University of Electronic TechnologyGuilin 541004China Guangxi Key Laboratory of Wireless Wideband Communication ＆ Signal Processing Guilin 541004China

In this paper, a high refractive index metamaterial （HRM）, whose element is composed of bilayer square patch （BSP） spaced by a dielectric plate, is proposed. By reducing the thickness of the dielectric plate and the gap between adjacent patches, the BSP can effectively enhance capacitive coupling and simultaneously suppress diamagnetic response, which significantly increases the refractive index of the proposed metamaterial. Furthermore, the high refractive index region is far away from the resonant region of the metamaterial, resulting in broadband. Based on these characteristics of BSP, a gradient refractive index （GRIN） lens with thin thickness （0.34/~0, where 2~0 is the wavelength at 5.75 GHz） is designed. By using this lens, we then design a circularly polarized horn antenna with high performance. The measurement results show that the 3-dB axial ratio bandwidth is 34.8% （4.75 GHz-6.75 GHz） and the antenna gain in this frequency range is increased by an average value of 3.4 dB. The proposed method opens up a new avenue to design high-performance antenna.

关键词： circularly polarized horn antenna high refractive index lens, metamaterial.

Synthesis and Structure-Activity Relationships of Ring-Opened Bengamide Analogues against Methicillin-Resistant Staphylococcus aureus

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Chinese Journal of Chemistry 2021年第3期39卷 671-676页

作者： Chen-Xi yu Bing-Yan Wei Xue-Qing Kong Cai-Guang Yang fa-Jun Nan State Key Laboratory of Drug Research the National Center for Drug ScreeningShanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China University of Chinese Academy of Sciences No.19A Yuquan RoadBeijing 100049China School of Pharmaceutical Science and Technology Hangzhou Institute for Advanced StudyUCASHangzhouZhejiang 310024China Yantai Key Laboratory of Nanomedicine&Advanced Preparations Yantai Institute of Materia MedicaYantaiShandong 264000China

Main observation and conclusion Methicillin-resistant Staphylococcus aureus(MRSA)has become a major threat on public health because of the increase of clinically isolated strains that exhibit resistance to many ***,development of new antibiotics for the treatment of MRSA in-fection is a sustained *** have previously identified a ring-opened bengamide analogue L472-2 that displays moderate ac-tivity against the growth of *** our previous work,we started from L472-2 and identified a class of analogues containing al-kynyl groups which have the potential to activate SaCIpP activity but moderate antibacterial ***,we focused on the anti-bacterial activity of L472-2,and a novel series of ring-opened bengamide analogues were synthesized and their activities were evalu-ated against *** conducting a compact analysis of the structure-activity relationships(SAR)of these analogues,we found that an adamantane ethanol ester bengamide 2j showed excellent antibacterial activity towards six *** strains,including MRSA,while it does not activate ***,these bengamide analogues represent a new class of candidates that suppress MRSA via-bility..

关键词： Bengamides Staphylococcus aureus Antibiotics Structure-activity relationships Pharmacokinetic

Effect of Modification Treatment for Reduction of Dephosphorization Slag in Hot Metal Bath

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Journal of Iron and Steel Research International 2013年第1期20卷 1-6,20页

作者： JIANG Mao-fa CUI yu-yuan WANG De-yong MIN Yi LIU Cheng-jun Institute of Ferrous Metallurgy School of Materials and MetallurgyNortheastern University

To extract the valuable elements from the steel slag, a novel approach has been proposed by modification treatment to provide the stronger driving forces and accelerate the reduction. Three types of dephosphorization steel slags were reduced using carbon-saturated iron bath to extract iron and phosphorus simultaneously. During the process of reduction, slag composition, temperature, and original P2O5 content were investigated respectively. Slag modification treatment, adding either silica or alumina to vary the slag composition, was proven to accelerate the reduction of dephosphorization slag. The equilibrium time can be shortened from 60 to 30 min. Slag modification also allowed the reduction reaction to occur at lower temperature. After slag modification, the original P2O5 content in slag presents a slight difference on reduction process. Almost half of the reduced phosphorus was vaporized within 5 and 20 min. As more and more FeO was reduced, CO gas generation decreased, and evaporation amount of phosphorus therefore decreases.

关键词： dephosphorization slag reduction modification treatment phosphorus vaporization

Lethal and Sub-Lethal Effects of Transgenic Rice Containing cry1Ac and CpTI Genes on the Pink Stem Borer, Sesamia inferens(Walker)

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Agricultural Sciences in China 2011年第3期10卷 384-393页

作者： HAN Lan-zhi HOU Mao-lin WU Kong-ming PENG yu-fa WANG Feng State Key Laboratory of Plant Disease and Insect Pests/Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing 100193P. R. China Key Laboratory of Agricultural Genetics Engineering Fujian Academy of Agricultural Sciences Fuzhou 350003 P.R.China

Lethal and sub-lethal effects of transgenic rice containing cry1Ac and CpTI genes on the pink stem borer, Sesamia inferens, were studied to collect information for ecological risk assessment on insect-resistance of transgenic rice. In vitro insect-feeding bioassays were conducted to evaluate the lethal and sub-lethal effects of transgenic rice lines （II YouKF6 and KF6） containing cry1Ac＋CpTI genes on S. inferens at four different growth stages, viz., seedling, tillering and elongation, booting, and milk and maturing. Transgenic rice at seedling stage showed significantly high lethal effect on S. inferens with the shortest lethal duration for 50 and 100% individuals and the highest corrected mortalities after feeding on transgenic lines at this stage for 3 and 6 d. Followed by tillering and elongation stage, 50 and 100% S. inferens were dead after feeding on transgenic lines at this stage for 4 and 10 d, respectively. Moreover, corrected mortalities for 6 d feeding on transgenic lines at this stage were significantly higher than that at booting, and milk and maturing stages. Lethal effect of KF6 on S. inferens decreased significantly at booting stage. Lethal duration for 50% S. inferens significantly extended and its corrected mortalities for 6 d feeding also declined remarkably. However, lethal effect of II YouKF6 on S. inferens did not decrease significantly at this stage. Transgenic rice at booting, and milk and maturing stages did not show significant lethal effect to S. inferens and it showed the longest lethal duration for 50% individuals and the lowest corrected mortalities for 3 and 6 d feeding. A few larvae of S. inferens could survive, pupate and emerge on these two transgenic lines at booting, and milk and maturing stages. Sub-lethal effect of two transgenic lines on S. inferens also differed significantly between different developmental stages. Continuously feeding on transgenic rice lines at seedling, and tillering and elongation stages delayed the devel

关键词： transgenic rice Sesamia inferens lethal and sub-lethal effect

6-O-Sulfated Modification of Natural Glycoalkaloids Chaconine and Solanine

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Chemical Research in Chinese Universities 2006年第2期22卷 189-192页

作者： ZHAO Ji-min LI Sheng-yu ZHOU Yi-fa ZHANG Li-ping ZHOU Dao-wei School of Life Sciences Northeast Normal University Changchun 130024P. R. China Department of Biology Changchun Normal CollegeChangchun 130032 P. R. China

Glycoalkaloids（GAS） have important biological and pharmaceutical activities, in order to study the relationship between the structures and the activities of carbohydrate chains, two natural glycoalkaloids, chaconine （compound 1 ） and solanine（ compound 2） , were isolated from potato stems and leaves（ Solanum tuberosum L. ）. The selective sulfation to the 6-hydroxy groups of chaeonine and solanine was carried out in a strategy by the use of protective groups. The 6-hydroxyl groups of the sugar chains in chaconine and solanine were protected with 4,4＇-dimethoxytrityl（DMT） while the other hydroxyl groups were acetylated. The protective group DMT was removed by using 0. 5% Tfa in dichloromethane, The free 6-hydroxyl groups were sulfated by chlorosulfonic acid pyridine to give 6-O-sulfated products. After the acetyl groups were removed, the final products obtained were sulfated chaconine and sulfated solanine.^ 13C NMR spectra confirmed that chaconine and solanine were sulfated at O6 of the carbohydrate moiety.

关键词： Glycoalkaloids Chaconine Solanine Sulfation

Resources publication and discovery in manufacturing grid

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第10期7卷 1676-1682页

作者： TAO Fei HU Ye-fa DING yu-feng SHENG Bu-yun ZHOU Zu-de School of Mechanical and Electronic Engineering Wuhan University of Technology Wuhan 430070 China

In the manufacturing grid＇s architecture, Resources Management System （RMS） is the central component responsible for disseminating resource information across the grid, accepting requests for resources, discovering and scheduling the suitable resources that match the requests for the global grid resource, and executing the requests on scheduled resources. In order to resolve the problem of resources publication and discovery in Manufacturing Grid （MGrid）, the classification of manufacturing resources is first researched after which the resources encapsulation class modes are put forward. Then, a scalable two-level resource management architecture is constructed on the model, which includes root nodes, domain nodes and leaf nodes. And then an RIMS is proposed, and the resources publication and discovery mechanism are detailedly described. At last, an application prototype is developed to show the validity and the practicability of the proved theory and method.

关键词： Manufacturing Grid (MGrid) Resources Management System (RMS) Resource classification Resource publication Resource discovery

Modeling and Simulation of Hydraulic Roll Bending System Based on CMAC Neural Network and PID Coupling Control Strategy

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Journal of Iron and Steel Research International 2013年第10期20卷 17-22页

作者： JIA Chun-yu SHAN Xiu-ying CUI Yan-cao BAI Tao CUI fa-jun College of Mechanical Engineering Yanshan University Hot Strip Mill of Jinan Iron and Steel Co. Ltd

The hydraulic roll bending control system usually has the dynamic characteristics of nonlinearity, slow time variance and strong outside interference in the roiling process, so it is difficult to establish a precise mathemati- cal model for control. So, a new method for establishing a hydraulic roll bending control system is put forward by cerebellar model articulation controller （CMAC） neural network and proportional-integral-derivative （PID） coupling control strategy. The non-linear relationship between input and output can be achieved by the concept mapping and the actual mapping of CMAC. The simulation results show that, compared with the conventional PID control algo- rithm, the parallel control algorithm can overcome the influence of parameter change of roll bending system on the control performance, thus improve the anti jamming capability of the system greatly, reduce the dependence of con- trol performance on the accuracy of the analytical model, enhance the tracking performance of hydraulic roll bending loop for the hydraulic and roll bending force and increase system response speed. The results indicate that the CMAC-P1D coupling control strategy for hydraulic roll bending system is effective.

关键词： hydraulic roll bending CMAC neural network PID control genetic algorithm