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浏览/检索结果: 共7条，第1-7条 帮助 限定条件 内容类型：会议论文     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 The Influence of Blade Tip Loading Distribution on the Performance of a High Loading Centrifugal Impeller 会议论文 2018 2ND INTERNATIONAL CONFERENCE ON ADVANCED TECHNOLOGIES IN DESIGN, MECHANICAL AND AERONAUTICAL ENGINEERING (ATDMAE 2018), 2018-01-01 作者:  Wang, Yilin;  Li, Zefeng;  Jin, Donghai;  Gui, Xingmin 收藏  |  浏览/下载：3/0  |  提交时间：2019/12/30 Aerospace engineering  Centrifugation  Computational fluid dynamics  Efficiency  Impellers  Inverse problems  Adverse effect  Centrifugal impeller  Design flow rate  Different distributions  Inverse design methods  Loading distribution  Stable operation  Total pressure ratio  Loading   Experimental research and numerical analysis of the effects of blasting vibration on young concrete 会议论文 CICTP 2012: Multimodal Transportation Systems - Convenient, Safe, Cost-Effective, Efficient - Proceedings of the 12th COTA International Conference of Transportation Professionals, 2012-08-03 作者:  Gao, Z.;  Zhu, Q.;  Huang, X. 收藏  |  浏览/下载：9/0  |  提交时间：2020/01/06 Adverse effect  Airport project  Blasting vibrations  Concrete cracks  Curing time  Design requirements  Experimental research  Model tests  Security technology  Site-testing  Strength  Young concrete  Concrete construction  Cost effectiveness  Curing  Multimodal transportation  Numerical analysis  Blasting   Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China Gu S.; Yan Y.; Xu K.; Jin G. 收藏  |  浏览/下载：40/0  |  提交时间：2013/03/25 With the development of aerospace remote sensing technology  the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures  the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera  the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera  the compensation method of image motion to space camera is researched. First  the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second  the system adopts 80C31 as controller of drift angle  and adopts stepping motor for actuators  and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced  and it achieve the closed-loop control of the drift angle position. At the last  this paper analyses the transmission precision of the mechanism. Through the experiment  we measured the actual precision of the image motion compensation mechanism  and compared with the theoretical analysis. There are two major contributions in this paper. First  the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism  it will bring adverse effects for the precision and stiffness of mechanism. For this problem  This paper designed a image motion compensation that have some advantages such as small size  light weight at the same time  high precision  stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second  the traditional mechanism control need to corrected  fitting and iterative for the control formula of mechanism. Only in this way  we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting  It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5  -4  -3  -2  -1  0  +1  +2  +3  +4  +4 as the expectation value of the imaginary drift angle  we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'  and it can achieve the high-precision image motion compensation. 2011 SPIE.   Numerical simulation of end restraint effects on triaxial strength of soil 会议论文 作者:  Su, Lijun;  Liao, Hongjian;  Wang, Shanyong;  Hang, Zhenyu 收藏  |  浏览/下载：3/0  |  提交时间：2019/12/10 Adverse effect  Deviatoric stress  Dilation angles  Drained triaxial tests  End restraint  Triaxial compression  Triaxial strength  Vertical displacements   The concentrated V(IV)/V(V) electrolyte optimization and electrode process investigation in a vanadium redox battery 会议论文 TMS Annual Meeting 作者:  Shi, F.;  Zou, J.;  Lu, H.;  Yuan, Y. 收藏  |  浏览/下载：3/0  |  提交时间：2020/01/06 Adverse effect  Electrode process  Electrolyte concentration  Electrolyte properties  Impedance techniques  Linear polarization  Organics  Peak currents  Pt electrode  Sulfate solutions  Vanadium concentration  Vanadium redox batteries  Vanadium redox battery  Alkali metals  Cyclic voltammetry  Electrolytes  Optimization  Platinum  Redox reactions  Vanadium alloys  Vanadium   Analysis on the Technological Synergism Effect of Cross-border Mergers and Acquisitions 会议论文 International Conference on Applied Social Science, MAR 19-20, 2011 作者:  Liu, Weiquan;  Li, Rui 收藏  |  浏览/下载：3/0  |  提交时间：2019/12/31 Technological Synergism  Cross-border Mergers & Acquisitions  Integration Adverse  Technological Spill-over Effect   Study of removing striping noise in CCD image (EI CONFERENCE) 会议论文 ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China Xiu J.-H.; Zhai L.-P.; Liu H. 收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25 Striping noise is the common system noise during formation of image using linear array CCD and has the character of periodicity  directivity and banding distributing. It can be caused by errors in internal calibration devices  or by slight gain/offset differences among the elements that conform the array of detectors. Striping noise covers up useful information in CCD image and brings adverse effect to image interpretation. On the basis of analyzing wavelet decomposed coefficient  the regularities of distribution about striping noise in wavelet coefficient is found  thereby the method of wavelet threshold selection which is suitable to striping noise distribution is put forward. According to Donoho's method about denoising using wavelet  the image including striping noise is processed. Comparing the power spectrum of processed image with the one of original image polluted by striping noise in frequency field  we find pulse brought by striping noise is removed and the goal which reserves image details and reduces stripes is achieved.