Littérature scientifique sur le sujet « Ultra-tight »
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Articles de revues sur le sujet "Ultra-tight"
Agyingi, Collins Amburo. « Ultra-Quasi-Metrically Tight Extensions of Ultra-Quasi-Metric Spaces ». Chinese Journal of Mathematics 2015 (30 septembre 2015) : 1–7. http://dx.doi.org/10.1155/2015/646018.
Texte intégralYao, Shanshan, Qi Wang, Yanfeng Bai et Huazhou Li. « A practical gas permeability equation for tight and ultra-tight rocks ». Journal of Natural Gas Science and Engineering 95 (novembre 2021) : 104215. http://dx.doi.org/10.1016/j.jngse.2021.104215.
Texte intégralDarabi, Hamed, A. Ettehad, F. Javadpour et K. Sepehrnoori. « Gas flow in ultra-tight shale strata ». Journal of Fluid Mechanics 710 (27 septembre 2012) : 641–58. http://dx.doi.org/10.1017/jfm.2012.424.
Texte intégralMews, Alhubail et Barati. « A Review of Brittleness Index Correlations for Unconventional Tight and Ultra-Tight Reservoirs ». Geosciences 9, no 7 (19 juillet 2019) : 319. http://dx.doi.org/10.3390/geosciences9070319.
Texte intégralYang, Chun Cheng, Hong Jun Yin, Tang Qian Zhu et Lei Wang. « A Model for Predicting Productivity of Multi-Staged Fractured Horizontal Wells in Ultra-Low Permeability Tight Gas Reservoirs ». Advanced Materials Research 934 (mai 2014) : 143–49. http://dx.doi.org/10.4028/www.scientific.net/amr.934.143.
Texte intégralMautner, Andreas, Koon-Yang Lee, Tekla Tammelin, Aji P. Mathew, Alisyn J. Nedoma, Kang Li et Alexander Bismarck. « Cellulose nanopapers as tight aqueous ultra-filtration membranes ». Reactive and Functional Polymers 86 (janvier 2015) : 209–14. http://dx.doi.org/10.1016/j.reactfunctpolym.2014.09.014.
Texte intégralSheng, Qiang, Livio Gibelli, Jun Li, Matthew K. Borg et Yonghao Zhang. « Dense gas flow simulations in ultra-tight confinement ». Physics of Fluids 32, no 9 (1 septembre 2020) : 092003. http://dx.doi.org/10.1063/5.0019559.
Texte intégralZhao, Jiafan, Xin Zhao, Quanhu Li et Jingyu Zhang. « Research on ultra-tight integrated navigation method based on CKF filtering algorithm ». Journal of Physics : Conference Series 2221, no 1 (1 mai 2022) : 012048. http://dx.doi.org/10.1088/1742-6596/2221/1/012048.
Texte intégralLi, Qunsheng, et Yan Zhao. « An Innovative High-Precision Scheme for a GPS/MEMS-SINS Ultra-Tight Integrated System ». Sensors 19, no 10 (17 mai 2019) : 2291. http://dx.doi.org/10.3390/s19102291.
Texte intégralGao, G., et G. Lachapelle. « A Novel Architecture for Ultra-Tight HSGPS-INS Integration ». Journal of Global Positioning Systems 7, no 1 (juin 2008) : 46–61. http://dx.doi.org/10.5081/jgps.7.1.46.
Texte intégralThèses sur le sujet "Ultra-tight"
Swarna, Ravindra Babu Surveying & Spatial Information Systems Faculty of Engineering UNSW. « Ultra-tight integration of GPS/Pseudolites/INS : system design and performance analysis ». Awarded by:University of New South Wales, 2006. http://handle.unsw.edu.au/1959.4/40075.
Texte intégralNiekamp, Philip M. « Investigation of the Turn-of-Nut Installation Procedure for XTB-HX Fasteners ». University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1421921620.
Texte intégralLee, Ting-Yu, et 李庭宇. « Fuzzy Strong Tracking Nonlinear Filter for Ultra-Tight GPS/INS Integration ». Thesis, 2010. http://ndltd.ncl.edu.tw/handle/88667153413447869119.
Texte intégral國立臺灣海洋大學
通訊與導航工程系
98
Ultra-tight integration is becoming more and more important in the future. Many advantages about the robustness in the high dynamics and the immunity to the jamming and interference. Due to these advantages, the next generation integrated GPS/INS navigation systems will be based on the ultra-tightly coupled system. The UKF employs a set of sigma points by deterministic sampling, such that the linearization process is not necessary, and therefore the error caused by linearization as in the traditional extended Kalman filter (EKF) can be avoided. An ultra-tight navigation integration processing scheme, called the strong tracking unscented Kalman filter (STUKF), is based on the combination of unscented Kalman filter (UKF) and strong tracking filter (STF). As a type of adaptive filter, the STF is essentially a nonlinear smoother algorithm that employs suboptimal multiple fading factors, in which the softening factors are involved. In order to resolve the shortcoming in traditional approach for selecting the softening factor through personal experience or computer simulation, a novel scheme called the fuzzy strong tracking unscented Kalman filter (FSTUKF) is presented where the Fuzzy Logic Adaptive System (FLAS) is incorporated for determining the softening factor. This paper carries out a fuzzy strong tracking unscented Kalman filter (FSTUKF) application approach for the ultra-tight GPS/INS integration. Through analyzing the relationship between GPS (I&Q) correlator outputs and navigation states (position and velocity), the EKF based system was presented an the baseline design. Finally, the application method of FSTUKF for the ultra-tight integration system is proposed. The proposed FSTUKF algorithm shows promising results in estimation accuracy when applied to the ultra-tight integrated navigation system application, as compared to the EKF, UKF and STUKF approaches.
Hu, Chia-Wei, et 胡家維. « The Ultra-Tight GPS/INS Navigation Algorithm Using Interacting Multiple Model Nonlinear Filtering ». Thesis, 2010. http://ndltd.ncl.edu.tw/handle/82546030858145814901.
Texte intégral國立臺灣海洋大學
通訊與導航工程系
98
In this thesis, application of the ultra-tight integration navigation algorithm using interacting multiple model (IMM) nonlinear filtering is studied for GPS/INS. The ultra-tight integration is also known as deep integration, which increases the receiver tracking bandwidth and suppresses noise, so as to promote GPS receiver performance. When the GPS signal losses, assistance of the aiding INS in the receiver's acquisition and re-acquisition process can still use the position, velocity on the delay lock loop (DLL) and phase lock loop (PLL) to promote the receiver’s tracking loop performance. Using the structure of ultra-tight in the receiver has many advantages, such as disturbance rejection and multi-path rejection, promoting high dynamic performance, tracking weak signals, improving the accuracy, urban or indoor positioning capability, shorten acquisition time, improved phase locked loop bandwidth, achieve a more accurate Doppler frequency shift and measurement of phase, etc. The unscented Kalman filter (UKF) employ a set of sigma points through deterministic sampling, such that the linearization process is not necessary, and therefore the error caused by linearization as in the traditional extended Kalman filter (EKF) can be avoided. There is no need to evaluate the Jacobian matrix. The use of IMM, which describes a set of switching models, finally provides the suitable value of process noise covariance. Consequently, the resulting sensor fusion strategy can efficiently deal with the nonlinear problem in vehicle navigation. The proposed IMMUKF algorithm shows significant improvement in navigation estimation accuracy as compared to the UKF approaches.
Yu-Chi, Wang, et 王鈺騏. « Investigation of the Doppler Velocity Aiding for Ultra-Tight GPS/INS Navigation Systems ». Thesis, 2011. http://ndltd.ncl.edu.tw/handle/54500063672919531661.
Texte intégral國立臺灣海洋大學
通訊與導航工程學系
99
This paper proposes a comprehensive approach to improve the accuracy of the Doppler estimates with the 4th order Autoregressive (AR) modelling of the inertial sensor random errors, which is studied for ultra-tight GPS/INS integration navigation . The ultra-tight integration is also known as deep integration, and using the structure of ultra-tight in the receiver has many advantages, such as disturbance rejection and multi-path rejection, promoting high dynamic performance, tracking weak signals, improving the accuracy, urban or indoor positioning capability, shorten acquisition time, improved phase locked loop bandwidth, achieve a more accurate Doppler frequency shift and measurement of phase, etc. Nevertheless, the tracking performance was still a concern in complex environments such as dynamic scenarios, indoor environments, urban areas, under foliages etc., where the GPS tracking loops lose lock due to the signals being weak, subjected to excessive dynamics or completely blocked. INS has two types of error sources: deterministic and stochastic. The navigation parameters, position, velocity and attitude are usually modelled as deterministic errors, whereas the residual biases from the sensors are modelled as stochastic errors. In this paper , the popular stochastic techniques–AR was investigated to model the Doppler signal , and calculate the Doppler frequency shift, which can be feedback to GPS tracking loops. The motivation of this research , was to eliminate the effect of stochastic error by Doppler with an integrated GPS/INS system using ultra-tight integration architecture.
Livres sur le sujet "Ultra-tight"
Weitzman, Martin L. A Tight Connection Among Wealth, Income, Sustainability, and Accounting in an Ultra-Simplified Setting. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198803720.003.0003.
Texte intégralChapitres de livres sur le sujet "Ultra-tight"
Xie, Yuchen, Pengcheng Ma, Zukun Lu, Feiqiang Chen et Feixue Wang. « A Software Defined Receiver for GNSS/INS Ultra-Tight Coupling Simulation ». Dans China Satellite Navigation Conference (CSNC) 2020 Proceedings : Volume III, 550–61. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3715-8_49.
Texte intégralRen, Jianxin, Junlin Zi et Jin Li. « A High-Precision Scheme for MINS/GPS Ultra-Tight Integration System ». Dans Lecture Notes in Electrical Engineering, 4237–50. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8155-7_352.
Texte intégralYang, Zhanwei, Yun Xu, Bo Cai, Liwei Wang et Liao Wang. « Reducing Fracturing Pressure by Using Novel Stimulating Technique for Ultra-tight Rock ». Dans Information Technology in Geo-Engineering, 460–67. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-32029-4_40.
Texte intégralFeng, Geng. « Research on Ultra-Tight Integration Technology for GNSS/SINS Integrated Navigation Systems ». Dans China Satellite Navigation Conference (CSNC) 2014 Proceedings : Volume III, 533–48. Berlin, Heidelberg : Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54740-9_47.
Texte intégralWang, Xiaoliang, Deren Gong, Yanguang Wang, Bo Qu, Longlong Li, Xingyuan Han et Yansong Meng. « Test Results of HiSGR : A Novel GNSS/INS Ultra Tight Coupled Spaceborne Receiver ». Dans Lecture Notes in Electrical Engineering, 285–95. Singapore : Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4591-2_23.
Texte intégralLi, Wei, Jiahe Xia et Guoda Cheng. « An Improved Vector Tracking Loop of Ultra-Tight Integration for Carrier Phase Tracking ». Dans Lecture Notes in Electrical Engineering, 475–84. Singapore : Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4591-2_38.
Texte intégralLuo, Ruilan, et Yongzhong Zhang. « Geological Characteristics and Production Performance of Ultra-Deep Naturally Fractured Tight Sandstone Gas Reservoirs ». Dans Proceedings of the International Field Exploration and Development Conference 2018, 959–72. Singapore : Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-7127-1_89.
Texte intégralJi, Zhen, Chuanjun Li et Xingcheng Li. « The Design of Simulation System of GPS/INS Ultra-tight Integration under High Dynamic Environment ». Dans AsiaSim 2012, 258–64. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-34390-2_30.
Texte intégralWang, Liao, Jun Li, Zhan-wei Yang, Ming-guang Che et Guo-wei Xu. « Analysis of Stimulation Effect and Optimization of Stimulation Mode for Ultra-deep Tight Gas Reservoir ». Dans Springer Series in Geomechanics and Geoengineering, 361–69. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2485-1_34.
Texte intégralRodríguez, F. J., A. Camacho et L. Quiroga. « A Tight-Binding Study of Interface States in Ultra-Thin Quantum Wells of HgTe in CdTe ». Dans Springer Proceedings in Physics, 423–28. Berlin, Heidelberg : Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-76376-2_63.
Texte intégralActes de conférences sur le sujet "Ultra-tight"
Ros, Eduardo, Javier D�az, Pablo Mar�n et Andr�s Rojo. « Ultra Tight Relative Timing in Finance Trading ». Dans 48th Annual Precise Time and Time Interval Systems and Applications Meeting. Institute of Navigation, 2017. http://dx.doi.org/10.33012/2017.15014.
Texte intégralMews, Kim S., Mustafa M. Alhubail et Reza Gh Barati. « A REVIEW OF BRITTLENESS INDEX CORRELATIONS FOR UNCONVENTIONAL TIGHT AND ULTRA-TIGHT RESERVOIRS ». Dans Joint 53rd Annual South-Central/53rd North-Central/71st Rocky Mtn GSA Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019sc-326962.
Texte intégralXu, Han. « Performance analysis and model for ultra-tight coupling ». Dans Sixth International Conference on Electronics and Information Engineering, sous la direction de Qiang Zhang. SPIE, 2015. http://dx.doi.org/10.1117/12.2202339.
Texte intégralFernandez-Prades, C., P. Closas et J. Vila-Valls. « Nonlinear Filtering for Ultra-Tight GNSS/INS Integration ». Dans ICC 2010 - 2010 IEEE International Conference on Communications. IEEE, 2010. http://dx.doi.org/10.1109/icc.2010.5502037.
Texte intégralNarayan, S. P., Z. Yang, S. S. Rahman et Z. Jing. « Propant Free-Shear Dilation : An Emerging Techology for Exploiting Tight to Ultra-Tight Gas Resources ». Dans SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1998. http://dx.doi.org/10.2118/49251-ms.
Texte intégralBarati, Reza. « Nanoparticles as Fluid Loss Control Additives for Hydraulic Fracturing of Tight and Ultra-Tight Hydrocarbon-Bearing Formations ». Dans ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23279.
Texte intégralChakraborty, Nirjhor, et Zuleima T. Karpyn. « Gas Permeability Evolution with Soaking Time in Ultra Tight Shales ». Dans SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/178740-stu.
Texte intégralWang, D., et J. Zhang. « Surfactant Drive Process in Ultra-Tight Fractured Reservoirs for EOR ». Dans 80th EAGE Conference and Exhibition 2018. Netherlands : EAGE Publications BV, 2018. http://dx.doi.org/10.3997/2214-4609.201801113.
Texte intégralMu, Yajie, Xinyi Wang, Mingliang Huang et Chao Ni. « Ultra-wideband 1bit reconfigurable reflectarray based on tight coupling method ». Dans 2021 13th International Symposium on Antennas, Propagation and EM Theory (ISAPE). IEEE, 2021. http://dx.doi.org/10.1109/isape54070.2021.9753440.
Texte intégralBabu, Ravindra, Jinling Wang et Gottapu Rao. « Analysis of Ultra-tight GPS/INS Integrated System for Navigation Performance ». Dans 2008 International Conference on Signal Processing, Communications and Networking. IEEE, 2008. http://dx.doi.org/10.1109/icscn.2008.4447195.
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