|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Infrared-transmission spectra and hydrogen content of hydrogenated amorphous silicon显示文摘In this paper, two kinds of methods of calculating the hydrogen content of a-Si:H thin film by means of the wagging mode and the stretching modes of infrared-transmission spectra , are investigated. The reason for the difference in these two calculation results is analyzed. If the contents of SiH2 and (SiH2)n are indicated in terms of a structure factor F=(I840+I880)/I2000, it is shown that the calculation results obtained from the two different methods are almost equal when the refractive index n is approximately 3.4 or the fitting thickness is between 0.71 and 0.89 mm in the case of a small F. It is shown that the ways of fabrication of thin film can influence silicon-hydrogen bonding configuration of a-Si:H film, and different ways of fabrication can lead to different contents of SiH2 and (SiH2)n. The uniformity of the thin film with a big F is bad. In this case, there is great difference between the thickness measured by the SurfCom408A surface profile apparatus and the thickness obtained by fitting the fringes; and the hydrogen contents of a-Si:H films obtained by means of the wagging mode and the stretching modes are different, too. But the fabrication of the MWECR CVD assisted by CAT CVD can effectively restrain the formation of SiH2 and (SiH2)n. | HU Yuehui CHEN Guanghua WU Yueying YIN Shengyi GAO Zhuo WANG Qing SONG Xuemei DENG Jinxiang | 2004 | Science China(Physics,Mechanics & Astronomy)2004，47，3： | 3 |
| 2 | EXPERIMENTAL AND THEORETICAL RESEARCH OF ELECTRON EMISSION MECHANISM OF M-TYPE CATHODES显示文摘With the most advanced Synchronous Radiation Photoelectron Spectrum(SRPS),the emission mechanism of M-type cathodes has been investigated from the perspective of chemical state.Based on the experimental results of SRPS analysis,a new model of the electron emission mechanism for M-type cathode is discussed.The main topics in this paper include the research status of electron emission mechanism of M-type cathodes;the advantages of SRPS technology;the distribution of oxygen chemical state on the cathode surface and the evolvement of oxygen chemical state during activation process;the relation between barium chemical state and osmium(Os)-coating;surplus barium and its formula;the characteristics of Os,and other noble metal coatings;the relation between film characteristics and emission performance of cathodes,the inhibition effects to the emission for Platinum(Pt)-coated cathode,etc.At the end of this paper,electron emission mechanism of M-type cathode is summarized and foreseen. | Yin Shengyi | 2014 | Journal of Electronics(China)2014，31，2： | 2 |
| 3 | High accuracy error separation technique for on-machine measuring straightness显示文摘 | Yin Ziqiang Li Shengyi | 2006 | Precision Engineering 302006，，： | 1 |
| 4 | High accuracy error separation technique for on-machine measuring straightness 显示文摘 | Yin Ziqiang Li Shengyi | 2006 | Precision Enginee- ring2006，30，2： | 1 |
| 5 | High accuracy error separation technique for on-machine measuring straightness显示文摘 | Yin Ziqiang Li Shengyi | 2006 | Precision Engineering2006，30，： | 1 |
| 6 | Review of self-referenced measurement algorithms: Bridging lateral shearing interferometry and multi-probe error separation显示文摘 | Dede ZHAI Shanyong CHEN Ziqiang YIN Shengyi LI | 2017 | Frontiers of Mechanical Engineering2017，12，2： | 1 |
| 7 | Exact straightness reconstruction for on-machine measuring precision workpiece 显示文摘 | Yin Ziqiang Li Shengyi | 2005 | Precision Engineering2005，29，： | 1 |
| 8 | High accuracy error separation technique for on-machine measuring straightness 显示文摘 | Yin Ziqiang Li Shengyi | 2006 | Precision Engineering2006，30，： | 1 |
| 9 | High accuracy error separation technique for on-machine measuring straightness显示文摘 | Yin Ziqiang Li Shengyi | 2006 | Precision Engineering2006，30，2： | 1 |
| 10 | Improvement on the conventional MW ECR-CVD system and preparation of hydrogenated amorphous silicon films显示文摘 | Chen Guanghua Zhu Xiuhong Yin Shengyi | 2005 | Vacuum2005，77，： | 1 |
| 11 | New multi-UAV formation keeping method based on improved artificial potential field显示文摘Formation keeping is important for multiple Unmanned Aerial Vehicles(multi-UAV)to fully play their roles in cooperative combats and improve their mission success rate.However,in practical applications,it is difficult to achieve formation keeping precisely and obstacle avoidance autonomously at the same time.This paper proposes a joint control method based on robust H∞ controller and improved Artificial Potential Field(APF)method.Firstly,we build a formation flight model based on the “Leader-Follower”structure and design a robust H∞ controller with three channels X,Y and Z to eliminate dynamic uncertainties,so as to realize high-precision formation keeping.Secondly,to fulfill obstacle avoidance efficiently in complex situations where UAVs fly at high speed with high inertia,this paper comes up with the improved APF method with deformation factor considered.The judgment criterion is proposed and applied to ensure flight safety.In the end,the simulation results show that the designed controller is effective with the formation keeping a high accuracy and in the meantime,it enables UAVs to avoid obstacles autonomously and recover the formation rapidly when coming close to obstacles.Therefore,the method proposed here boasts good engineering application prospect. | Hanlin SHENG Jie ZHANG Zongyuan YAN Bingxiong YIN Shengyi LIU Tingting Bai Daobo WANG | 2023 | Chinese Journal of Aeronautics2023，36，11： | 0 |
| 12 | Effect of spatial configuration on adhesion of 1,2-disubstituted cyclohexane derivatives显示文摘Spatial configuration has a significant effect on chemical self-assembly.However,the importance of spatial configuration in supramolecular adhesive materials has been frequently ignored.In this study,the effects of the spatial configuration on cohesion and adhesion were investigated.Owing to the diversities of the chemical structures and assembly patterns,1,2-disubstituted cyclohexane derivatives were used in this combined experimental and theoretical investigation.The self-sorting assembly of enantiopure isomers improved cohesion but had a negative effect on adhesion.In contrast,racemic mixtures displayed stronger adhesion effects.Moreover,it was proven that the cis-configuration was more favorable for supramolecular adhesion than the trans-counterpart.In addition,the influence of the spatial configuration of 1,2-disubstituted cyclohexane derivatives could be effectively mitigated by hydrogen bond donors or acceptors.The addition of natural acids yielded three-dimensional polymeric networks,in which the spatial configuration was not the decisive factor for supramolecular adhesion. | Qiao Zhang Yuhang Yin Jingfu Song Gai Zhao Shengyi Dong | 2023 | Chinese Chemical Letters2023，34，8： | 0 |
| 13 | HIGH EMISSION PERFORMANCE IMPREGNATED DISPENSER CATHODE显示文摘In order to obtain higher emission performance than that of a traditional M-type cathode, we have developed a new type impregnated dispenser cathode. The new cathode is impregnated with a new active substance with molar ratio of 26BaO·29SrO·8Sc2O3 ·7CaO·Al2O3 . This paper introduces the emission performance, surface active material, and work function of the new cathode. At 1100℃B , the DC current density and pulse current density are 30.6±1.0 A/cm2 and 171.6±2.8 A/cm2 , respectively, 2.1 and 5.4 times of that of an M-type cathode. The work function of the new cathode is 1.668± 0.002 eV. High concentration O-Al-Sc-Sr-Ba and O-Al-Sc-Ba are found in the pores and at pore edges, respectively. By comparing the emission performances and surface characteristics of as-polished and as-cleaned cathodes, it is proposed that, the emission around pore ends forms the major part of the total emission for the new cathodes. | Yin Shengyi Peng Zhen Zheng Qiang Wang Yu | 2013 | Journal of Electronics(China)2013，30，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员