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Effect of Fe concentration on the nonlinear refraction and reverse saturable absorption in ferroelectric X-cut liNbO_3 crystal

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Chinese Optics letters 2015年第7期13卷 92-95页

作者： h.l.Saadon laser Applications and Optical Materials Group Department of Physics College of ScienceUniversity of Basrah

In this letter, the effects of the iron （Fe） dopant concentration on the nonlinear optical properties of iron-doped ferroelectric X-cut liNbO3 crystals plates are studied by using the Z-scan technique with a cw laser at the wave- length of 532 nm. The amount of iron in the compound is varied from 0 to 0.15 mol%. Measurements of nonlinear refractive index n2 and the nonlinear absorption coefficient β are determined. The sign of the nonlinear refractive index is found to be negative and the magnitude is on the order of 10-s cm2/W. This nonlinear effect increases as the concentration increases from 0 to 0.15 mol%. A good linear relationship is obtained between nonlinear refractive index, nonlinear absorption coefficient, and concentration.

关键词： Fe Effect of Fe concentration on the nonlinear refraction and reverse saturable absorption in ferroelectric X-cut liNbO3 crystal

Carbonylation　of　Allyl　Chloride　Catalyzed　by　PdCl_2（TPPTS）_2　in　Two－phase　Medium

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Chinese Chemical letters 1996年第9期7卷 847-848页

作者： jiang, h Xu, Y liao, SJ Yu, DR Chen, h li, XJ ChINESE ACAD SCI DALIAN INST CHEM PHYSDALIAN 116023PEOPLES R CHINA SIChUAN UNIV DEPT CHEMCHENGDU 610064PEOPLES R CHINA

PdCl2(TPPTS)2 exhibits very high catalytic activity for carbonylation of allyl chloride in aq. NaOh / toluene two-phase medium under atmospheric *** average turnover frequency (TOFav,mol substrate / mol Pd·min) reach... 详细信息

关键词： TPPTS PdCl2 Two Catalyzed phase Allyl Carbonylation

Simultaneous biodegradation of nitrogen-containing aromatic compounds in a sequencing batch bioreactor

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Journal of Environmental Sciences 2007年第5期19卷 530-535页

作者： lIU Xing-yu WANG Bao-jun jiang Cheng-ying ZhAO Ke-xin harold l. Drake lIU Shuang-jiang State Key lab of Microbial Resources at Institute of Microbiology Chinese Academy of Sciences Beijing 100080 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Department of Ecological Microbiology University of Bayreuth 95445 Bayreuth Germany

Many nitrogen-containing aromatic compounds （NACs）, such as nitrobenzene （NB）, 4-nitrophenol （4-NP）, aniline （AN）, and 2,4-dinitrophenol （2,4-DNP）, are environmentally hazardous, and their removal from contaminated water is one of the main challenges facing wastewater treatment plants. In this study, synthetic wastewater containing NB, 4-NP, 2,4-DNP, and AN at concentrations ranging from 50 to 180 mg/l was fed into a sequencing batch reactor （SBR）. Analyses of the SBR system indicated that it simultaneously removed more than 99% of the NACs at loading rates of 0.36 kg NB/（m^3·d）, 0.3 kg 4-NP/（m^3·d）, 0.25 kg AN/（m^3·d）, and 0.1 kg 2,4-DNP/（m^3·d）. Bacterial groups of Bacteriodetes, Candidate division TM7, α-Proteobacteria, and β-Proteobacteria were dominant in the clone libraries of 16S rRNA genes retrieved from the microbial communities in the SBR system. ＂Cycle tests＂ designed to alter feeding and aeration parameters of the SBR system demonstrated that the resident microbial biome of the SBR system responded rapidly to changing conditions. Consumption of O2 was concomitant with the apparent mineralization of NACs. Aromatic ring-cleaving dioxygenase activities suggested that （1） AN and NB were degraded via catechol 2,3-dioxygenase; （2） 4-NP was degraded via 1,2,4-benzentriol 1,2-dioxygenase; and （3） 2,4-DNP was degraded via an unresolved pathway.

关键词： nitrogen-containing aromatic compounds biodegradation sequencing batch reactor Candidate division TM7

Improvement of Toughness of UhMWPE/PP Blends

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Journal of Beijing Institute of Technology 2019年第3期28卷 667-674页

作者： Feixiang Guo hao jiang hui lü Yanhua Yin School of Chemistry and Chemical Engineering Beijing Institute of Technology

Ultra-high molecular weight polyethylene (UhMWPE) was blended with polypropylene (PP) in order to ensure good processing. Inorganic rigid particles were also used to toughen UhMWPE/PP blends. CaCO3 and a compound additive containing heat mixed polyethylene glycol 2000 and white diatomite were added to the blends. The crystalline, surface morphology and mechanical properties of the blends were investigated comprehensively. The toughness of the material is effectively improved. By contrast, the compound additive had a better result. When the content of additive was 15%, the elongation at the break increased by 279.2% and the fracture energy increased by 343.8% compared to the original samples.

关键词： ultra-high molecular weight polyethylene (UhMWPE) inorganic filler toughness

Automatic Placement of GIS Vector Map Annotation in Area Feature by long Diagonal

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Geo-Spatial Information Science 2005年第4期8卷 276-281页

作者： lAN Xiaoji jiang Yongfa lü Guonian DENG huamei jiangxi University of Science and Technology 86 Hongqi Road Ganzhou 341000 China 不详

This paper discusses the placement of Chinese annotation from point of view of graphics. Area Feature is classified as simple polygon, complex polygon and special polygon. For simple ones, annotations are placed along the longest edge. For complex ones, firstly the polygon are simplified according to close points, then the longest diagonal is gotten by comparing length, lastly, annotations are placed along long diagonal. For special ones, the polygon are partitioned into several parts by a certain rule for getting their sub\|diagonals, then their annotation are placed by means of the second.

关键词： long-diagonal area eature annotation automatic placement

Sensitive analysis of amino acids in injection liquor by reversed-phase hPlC

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Chinese Journal of Chemistry 1995年第2期13卷 163-168页

作者： ShANG, Zh YU, YN GUO, W jiang, h ZhOU, lM ChINESE ACAD SCI DALIAN INST CHEM PHYSDALIAN 116012PEOPLES R CHINA

A convenient derivatization method of amino acids with 1-fluoro-2,4-dinitrobezene as reaction reagent and a separation system were described. The derivative amino acids were separated on a specific chemically bonded phase column with a simple linear gradient elution consisting of aqueous buffer and methanol. The eluate was detected by common ultraviolet absorption detector at 360 nm. The detection limits of amino acids were as low as 10 picomole. This method has been successfully applied to assay amino acid injection liquor used in hospital. It has good reproducibility and precision. The procedures avoid the requirements of particular derivative equipment and analyzer employed in conventional amino acid analysis.

关键词： AMINO ACIDS PRECOlUMN DERIVATIZATION REVERSED PhASE SEPARATION UV ABSORPTION DETERMINATION

Optomechanically induced transparency in a spinning resonator

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Photonics Research 2017年第4期5卷 367-371页

作者： hAO lü YAJING jiang YU-ZhU WANG hUI JING Key laboratory for Quantum Optics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Physics Henan Normal University Key laboratory of low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University

We study optomechanically induced transparency in a spinning microresonator. We find that in the presence of rotation-induced Sagnac frequency shift, both the transmission rate and the group delay of the signal are strongly affected, leading to a Fano-like spectrum of transparency. In particular, tuning the rotary speed leads to the emergence of nonreciprocal optical sidebands. This indicates a promising new way to control hybrid light–sound devices with spinning resonators.

关键词： rate

Development of a high-strength Mg alloy with superior ductility through a unique texture modification from equal channel angular pressing

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Journal of Magnesium and Alloys 2021年第3期9卷 1007-1018页

作者： l.B.Tong J.h.Chu W.T.Sun Z.h.jiang D.N.Zou S.F.liu S.Kamado M.Y.Zheng School of Metallurgical Engineering Xi'an University of Architecture and TechnologyXi'an 710055China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Jilin UniversityChangchun 130025China Department of Mechanical Engineering Nagaoka University of TechnologyNagaoka 940-2188Japan

In the current study,a homogenous ultra-fine grained microstructure with average grain size of 1.0μm is achieved in the Mg-Zn-Ca-Mn alloy through the reduplicative equal channel angular pressing(ECAP)at 300℃,and the mechanical properties are remarkably improved,with room-temperature yield strength of 269.6 MPa and elongation of 22.7%.The twinning deformation results in a discontinuous recrystallization behavior in the initial stage of *** further deformation,the continuously dynamic recrystallization contributes to an obvious grain refinement *** activation of non-basal slip system leads to the formation of a unique basal texture,which is related to the elevated ECAP temperature and the decreased grain *** grain refinement and texture modification derived from ECAP process result in the increase of yield strength,while the cracked secondary phase particles are beneficial to the enhanced ductility,through reducing the stress concentration and hindering premature failure.

关键词： Mg alloy ECAP Microstructural evolution high strength Superior ductility

herbivory effects of Argopistes tsekooni, a chrysomelid beetle, on container-grown Chinese privet, ligustrum sinense

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Insect Science 2011年第2期18卷 203-208页

作者： Yan-Zhuo Zhang James l. hanula jiang-hua Sun State Key laboratory of Integrated Management of Pest Insects & Rodents Institute of Zoology Chinese Academy of Sciences Beijing Graduate University of Chinese Academy of Sciences Beijing China USDA Forest Service Southern Research Station Athens GA USA

The impact ofArgopistes tsekooni Chen （Coleoptera： Chrysomelidae）, a herbivore, on Chinese privet, ligustrum sinense lout. （Scrophulariales： Oleaceae）, an invasive shrub in the United States, was studied in China. Five densities of adults were inoc- ulated into 3-year-old potted Chinese privet plants in cages under field conditions for 1 month. Plants exposed to high densities of adults were severely damaged and the aboveground portions of some were killed, while the survival rates of adult A. tsekooni were comparatively high. The amount of new growth of the main stem, the number of new leaves, and oven-dried biomass were significantly reduced by the combined feeding of larvae and adults. Above-ground plant mortality was 100% when plants were exposed to 24 and 30 adults/plant. In this study A. tsekooni had a significant negative impact on Chinese privet growing in pots, which suggests that it may be a promising candidate for biological control of Chinese privet in the field in North America.

关键词： biological control Chrysomelidae Coleoptera Oleaceae plant mortality,pre-release efficacy assessment