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Palladium-Catalyzed Propargylic [n+2] Cycloaddition: An Efficient Strategy for Construction of Benzo-Fused Medium-Sized Heterocycles 期刊论文 OAI收割
ADVANCED SYNTHESIS & CATALYSIS, 2019, 卷号: 361, 期号: 4, 页码: 836-841
作者: Liu, Zhen-Ting; Hu, Xiang-Ping

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A regioselective palladium-catalyzed formal [n+2] cycloaddition of propargylic esters as C-2-synthons with various linker-tethered bisphenols for the construction of medium-sized heterocycles bearing an exocyclic double bond has been developed The reaction features mild conditions and broad substrate scopes as well as readily available substrates and catalysts Under optimal conditions various medium-sized heterocycles from eight to eleven-membered rings can be afforded in good to excellent yields and regioselectivities with high Z-selectivity for the exocyclic double bond palladium medium-sized ring propargylic ester bisphenol cycloaddition

Palladium-catalyzed propargylic [n+2] cycloaddition: an efficient strategy for construction of benzo-fused medium-sized heterocycles 期刊论文 iSwitch采集
Advanced synthesis & catalysis, 2019, 卷号: 361, 期号: 4, 页码: 836-841
作者: Liu, Zhen-Ting; Hu, Xiang-Ping

收藏 | 浏览/下载：91/0 | 提交时间：2019/05/08

A regioselective palladium-catalyzed formal [n+2] cycloaddition of propargylic esters as c-2-synthons with various linker-tethered bisphenols for the construction of medium-sized heterocycles bearing an exocyclic double bond has been developed The reaction features mild conditions and broad substrate scopes As well as readily available substrates and catalysts Under optimal conditions Various medium-sized heterocycles from eight to eleven-membered rings can be afforded in good to excellent yields and regioselectivities with high z-selectivity for the exocyclic double bond Palladium Medium-sized ring Propargylic ester Bisphenol Cycloaddition

First principles investigation of Be3X2 (X = N, P, As) and their alloys for solar cell applications 期刊论文 OAI收割
Journal of Alloys and Compounds, 2019, 卷号: 795, 页码: 385-390
作者: M.Ullah; R.Ali; G.Murtaza; Y.Chen

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收藏 | 浏览/下载：52/0 | 提交时间：2020/08/24

Beryllium nitride alloys,Optical spectra,Device absorption,efficiencies,thermoelectric properties,structural-properties,electronic-structure,halide perovskites,optical-properties,crystal-structure,alpha-be3n2,Chemistry,Materials Science,Metallurgy & Metallurgical Engineering

Modified EPAX2 parameterization for estimating the fragment cross sections at intermediate energies 期刊论文 OAI收割
NUCLEAR PHYSICS A, 2013, 卷号: 915, 页码: 59-69
作者: Zhang, X. H.

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收藏 | 浏览/下载：25/0 | 提交时间：2018/07/05

Deduced Modified Epax2 Parameter Set Nuclear Reactions Be-9 Be-9 Calculated Fragmentation Sigma Ta-181(40ar Ta-181(Ni-58 Mass Yields x) x) Isotope Yields Using Epax2 Formula E=57 Mev/nucleon E=140 Mev/nucleon

Tribological properties of Mos2 thin coatings under liquid lubricating (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Innovation Manufacturing and Engineering Management, IMEM 2012, December 14, 2012 - December 16, 2012, Chongqing, China
Bai Y.; Cao P.

收藏 | 浏览/下载：33/0 | 提交时间：2013/03/25

The objective of this study is to investigate the effect of solid and liquid lubrication on friction and wear performance of selected solid lubricating coatings comparative experiments have been carried out on magnetron sputtered MoS2 coatings against Si3N4 ball using a ball-on-disk tribo-tester under the conditions of room temperature and different lubrication. Surface morphology of coatings were investigated by atom force microscope (AFM) and friction coefficient (COF) and wear rate of solid films were also be analyzed. It was shown that the friction is greatly reduced when the solid film is lubricated with oil and grease simultaneously in comparison with single-lubricant lubrication at the start-up or under boundary lubrication conditions. Liquid lubrication causes a dramatic decrease of the wear-ability of the MoS2 coatings. The effect of oil lubrication to the deterioration of wear resistance of MoS2 film was even worse than lubrication grease. (2013) Trans Tech Publications Switzerland.

Structural amelioration of 920 nm optically pumped semiconductor vertical external-cavity surface emitting laser (OPS-VECSEL) (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Energy, Environment and Sustainable Development, EESD 2012, October 12, 2012 - October 14, 2012, Jilin, China
作者: Liu Y.; Liu Y.; Wang L.; Wang L.; Wang L.

收藏 | 浏览/下载：20/0 | 提交时间：2013/03/25

920 nm optically pumped semiconductor vertical external-cavity surface emitting laser (OPS-VECSEL) has an important application in laser display. We constructed and optimized a 920 nm OPS-VECSEL with active region of In0.09Ga0.91As quantum well (QW) system pumped by 808 nm laser diode module. By the finite element method self-consistent solutions of the semiconductor electronic and optical equations are realized to calculate the characteristics parameters of OPS-VECSEL. The performances of device especially the mode the threshold and the optical-optical translation efficiency were analyzed by dealing with different number of QWs (1 2 and 3) in one period QW depth barrier width the component and dimension of the non-absorption layer. We chose an improved structure of them. On this basis we ameliorated the number of QW periods and the simulation showed that in order to obtain high performance device the choice of the number of QW periods must be cautious. (2013) Trans Tech Publications Switzerland.

Laser cleaning of neutral attenuator plate based on low power laser diode (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Energy, Environment and Sustainable Development, EESD 2012, October 12, 2012 - October 14, 2012, Jilin, China
作者: Chen Y.; Li L.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

Laser cleaning is a non-contact green and environmental cleaning method which can effectively remove particulate contaminations of sizes as small as 0.1 m without damage to the optics. But most laser cleaning devices are large and heavy also expensive due to using large lasers such as CO2 laser YAG Laser etc. In this work a low power LD was tried to clean fingerprint and dust contaminated on the surface of the attenuator glasses plates. In the laser cleaning experiment with low power diode the fingerprint grease can be efficient to be cleaned but there is no evident effect for cleaning inorganic dust. The cleaning different degree of fingerprint contaminations was investigated at the variable laser parameters including laser power and irradiation time. An optical microscope was used to analyze the cleaning effect. The results show that low power LD can effectively remove the fingerprint on the surface of absorptive-type attenuator glass plates. On the premise that the attenuator optics glasses are not damaged the cleaning area increases with the increase of radiation time and laser power. The cleaning area doesn't change much with the variation of laser frequency when the other parameters are the same. (2013) Trans Tech Publications Switzerland.

STEP Mission: Search for Terrestrial Exo-Planets 会议论文 OAI收割
European Planetary Science Congress 2013,, London, UK, 2013
Chen D.; Wu; J.; Li B.

收藏 | 浏览/下载：32/0 | 提交时间：2014/04/30

Search for Terrestrial Exo-Planest (hereafter STEP) mission is a latest advanced research project in Chinese Strategic Pioneer Program (SPP) on Space Science. STEP aims at the nearby earth-alike planets detection comprehensive research on the planetary system and some astrometry research with 0.5 uas precision in the space which will get the fruitful achievements in the exo-planetary and astrometry research fields. STEP will take the Space Astrometry technique in the optical band. The FOV is 0.44 degree based on 1.2m primary and focus length is 50m. The special metrology technique will be taken to reach 0.5 uas astrometry precision which will be idea for terrestrial exo-planets detection. The mission will take the L2 orbit.

KW-output high beam quality diode laser array source (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
作者: Zhang J.; Wang L.; Wang L.; Wang L.; Liu Y.

收藏 | 浏览/下载：38/0 | 提交时间：2013/03/25

With the advantages of small volume light weight high efficiency and long lifespan diode laser has been widely applied to industrial processing. Presently for laser used as processing light source needs to amount to dozens of KW per cm2 of power density how to increase power output and get smaller light spot for diode laser becomes a key problem. It is introduced that by designing beam shaping by ourselves and making use of optical system for beam blooming and focusing 808nm laser array composed of 20 bars eventually achieves the 1001.5w power output coupling efficiency at 90% 11mm2 of light spot through experiments which enables diode laser to be directly applied to cladding welding and so on. 2012 IEEE.

The design problems of one kind of chaotic one-way hash function (EI CONFERENCE) 会议论文 OAI收割
2012 4th International Conference on Multimedia and Security, MINES 2012, November 2, 2012 - November 4, 2012, Nanjing, Jiangsu, China
Li P.; Zhang M.; Shi J.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

The construction method of one kind of one-way hash function based on 1-D Logistic map is analyzed. The design problem and some collision problems are pointed out. By using the dictionary attack the collision probability of the arithmetic realized with signal floating point numbers is 2-23 and the collision probability of the arithmetic realized with double floating point numbers is 2-55. The reasons for these design problems are discussed and some key problems are pointed out which should be taken care of while constructing one-way hash function based on a digital chaotic map. 2012 IEEE.