检索结果-内蒙古大学图书馆

作者： Deng, Yanyan Ganzhou Teachers College Ganzhou341000 China

To improve the accuracy of the translation software English results, this article, taking the research of translation correction algorithms, this paper discusses mainly the present situation of the English translation software, demonstrated to improve the accuracy of translation in the necessity, after the correction algorithm were analyzed, and a basic algorithm model, finally for validation algorithm model, first for translation in the process of system design, and then on the basis of this system, The advantages of the proposed algorithm can be verified by comparison with the two mainstream translation systems. Through this study, the algorithm system can effectively improve the accuracy of English translation results, and has certain advantages compared with mainstream translation systems. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： correction algorithm English translation Machine translation

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Quantitative Analysis Method and correction algorithm Based on Directivity Beam Pattern for Mismatches between Sensitive Units of Acoustic Dyadic Sensors

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SENSORS 2023年第12期23卷 5709-5709页

作者： Yang, Lingmeng Zhu, Zhezheng Chen, Wangnan Gao, Chengchen Hao, Yilong Yang, Zhenchuan Peking Univ Sch Integrated Circuits Beijing 100871 Peoples R China

Acoustic dyadic sensors (ADSs) are a new type of acoustic sensor with higher directivity than microphones and acoustic vector sensors, which has great application potential in the fields of sound source localization and noise cancellation. However, the high directivity of an ADS is seriously affected by the mismatches between its sensitive units. In this article, (1) a theoretical model of mixed mismatches was established based on the finite-difference approximation model of uniaxial acoustic particle velocity gradient and its ability to reflect the actual mismatches was proven by the comparison of theoretical and experimental directivity beam patterns of an actual ADS based on MEMS thermal particle velocity sensors. (2) Additionally, a quantitative analysis method based on directivity beam pattern was proposed to easily estimate the specific magnitude of the mismatches, which was proven to be useful for the design of ADSs to estimate the magnitudes of different mismatches of an actual ADS. (3) Moreover, a correction algorithm based on the theoretical model of mixed mismatches and quantitative analysis method was successfully demonstrated to correct several groups of simulated and measured beam patterns with mixed mismatches.

关键词： acoustic dyadic sensor mismatch quantitative analysis correction algorithm

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Stray Light correction algorithm for High Performance Optical Instruments: The Case of Metop-3MI

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REMOTE SENSING 2022年第6期14卷 1354-1354页

作者： Clermont, Lionel Michel, Celine Stockman, Yvan Univ Lege Ctr Spatial Liege STAR Inst B-4031 Liege Belgium

Stray light is a critical aspect for high performance optical instruments. When stray light control by design is insufficient to reach the performance requirement, correction by post-processing must be considered. This situation is encountered, for example, in the case of the Earth observation instrument 3MI, whose stray light properties are complex due to the presence of many ghosts distributed on the detector array. We implement an iterative correction method and discuss its convergence properties. Spatial and field binning can be employed to reduce the computation time but at the cost of a decreased performance. Interpolation of the stray light properties is required to achieve high performance correction. For that, two methods are proposed and tested. The first interpolate the stray light in the field domain while the second applies a scaling operation based on a local symmetry assumption. Ultimately, the scaling method is selected and a stray light reduction by a factor of 58 is obtained at 2 sigma (129 at 1 sigma) for an extended scene illumination.

关键词： stray light radiometric accuracy Earth observation correction algorithm ghost reflections

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Demonstration of a large viewing angle and high-resolution floating three-dimensional display based on the multichannel and multivariable correction algorithm

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OPTICAL ENGINEERING 2020年第10期59卷 102410-102410页

作者： Du, Jingyan Sang, Xinzhu Yu, Xunbo Gao, Xin Gao, Chao Yan, Binbin Beijing Univ Posts & Telecommun State Key Lab Informat Photon & Opt Commun Beijing Peoples R China

Floating three-dimensional (3-D) display can provide a natural and realistic 3-D scene. Nowadays, because of stray light and aberration, most floating 3-D displays cannot realize a large viewing angle and high resolution simultaneously, and it directly deteriorates the viewing effect of the 3-D scene. A large viewing angle floating and high-resolution 3-D display based on multichannel and multivariable (MCMV) correction algorithm are presented. The optical system consists of a time-sequential autostereoscopic 3-D display with the directional backlight, a floating lens, and an eye tracker. The 3-D display with the directional backlight provides loss-free resolution for the system. To realize a large viewing angle floating 3-D display, MCMV correction algorithm based on eye tracking is proposed. The 3-D images can be reconstructed by the optical system within the viewing angle of 60 deg. The feasibility of the proposed display method is verified with the experimental results. (C) 2020 Society of Photo-Optical Instrumentation Engineers (SPIE)

关键词： floating three-dimensional display large viewing angle correction algorithm

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A passive synthetic aperture phase correction algorithm for the asymmetric twin-line array sonar

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Chinese Journal of Acoustics 2007年第4期26卷 337-344页

作者： LI Yu ZHANG Yangfan HUANG Haining LI Shuqiu LI Qihu ZHANG Chunhua Institute of Acoustics The Chinese Academy of Sciences Beijing 100080

A passive synthetic aperture based on phase correction algorithm for solving the port-starboard discrimination problem in the non-aligned towed twin-line array sonar, is described. This method creates a virtual array through applying the estimated phase correction into one array of twin-line arrays. Because the synthetic virtual array is aligned with the other array in twin-line arrays, the right port-starboard discriminated results can be obtained by array processing based on the new synthetic twin-line array. The effect of proposed method has been shown by simulated and sea-trials results in towed twin-line array sonar. With low extra computational loads, the proposed method is easy to apply to the practice.

关键词： correction algorithm synthetic aperture

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Evaluation of correction algorithm for the Reflectance Measured with Optical Glass

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Journal of Donghua University(English Edition) 2003年第2期20卷 52-55页

作者：车江宁周志华陈东辉 School of Graduate Donghua University Shanghai 200051 School of Graduate Donghua University Shanghai 200051he proposed algorithm for reflectance measured with optical glass has been verified with materials of various forms. The reflectances measured with optical glass ( raw) without glass (true) and corrected by the algorithm are compared. The results show that the corrected reflectance agrees very well with true one and their color differences fall below the acceptable limit which indicates the validity of the correction algorithm. The algorithm could be used not only for fiber-forming materials but also for powder-forming granulate-forming etc.

The proposed algorithm for reflectance measured with optical glass has been verified with materials of various forms. The reflectances measured with optical glass ( raw), without glass (true) and corrected by the algorithm are compared. The results show that the corrected reflectance agrees very well with true one and their color differences fall below the acceptable limit, which indicates the validity of the correction algorithm. The algorithm could be used not only for fiber-forming materials, but also for powder-forming, granulate-forming, etc.

关键词： correction algorithm Reflectance Optical Glass

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A New Post correction algorithm (PoCoA) for Improved Transportation Mode Recognition

A New Post Correction Algorithm (PoCoA) for Improved Transpo...

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IEEE International Conference on Systems, Man, and Cybernetics

作者： Zelun Zhang Stefan Poslad School of Electronic Engineering and Computer Science Queen Mary University of London London UK

ISBN: (纸本)9781479906505

Transportation mode plays an important role in enabling us to derive a mobile user's context, and to adapt intelligent services to this. However, current methods have two key limitations: a low recognition accuracy and coarse-grained recognition capability. In this paper, we propose a new Post correction algorithm (PoCoA) that is applied after the use of typical classifiers to address these limitations. We evaluated the use of PoCoA for the following transportation modes, walking, cycling, bus passenger, metro passenger, car passenger, and car driver. PoCoA enhances a typical accelerometer-based transportation recognition method with a more accurate subclassification of motorized transportation modes when tested on a dataset obtained from 15 individuals. Overall accuracy improved from 69% to 88% when comparing with a state of the art two-stage classifier (Decision Tree + Discrete Hidden Markov Model).

关键词： Transportation mode recognition Accelerometer Post correction algorithm Hidden Markov Model (HMM) Transportation modes accelerometers state of the art correction algorithm Passenger cars Recognition (Psychology) Hidden Markov models Enabling passengers

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Hardware Implementation and Verification of the Sensor Defective Pixels correction algorithm

Hardware Implementation and Verification of the Sensor Defec...

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Wave Electronics and its Application in Information and Telecommunication Systems (WECONF)

作者： Yu. A. Polovneva A. A. Skitev A. N. Hailov National Research Nuclear University "MEPhI" Moscow Russian Federation LLC"OhT" Moscow Russian Federation

ISBN: (数字)9781728149448

ISBN: (纸本)9781728149455

algorithms for correction of defective pixels of sensor raw data are considered. A modification of the directed average sum algorithm is proposed. Implemented module includes multiple stages conveyor. Two parameters that can influence on module's and conveyor's performance: size of color component and number of pixels per clock. A numerical study of the quality of image correction by the selected algorithm depending on the module parameters was carried out, as well as a comparison of the result with correction by the average method. A verification environment has been developed, and the module has been verified via UVM (IEEE 1800.2-2017 Universal Verification Methodology).

关键词： image correction dead pixels hot pixels FPGA verification UVM IMAGE RECTIFICATION Verification Field programmable gate arrays dead pixels pixel correction algorithm algorithms

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Theoretical Analysis and Simulation of Phase Difference correction algorithm

Theoretical Analysis and Simulation of Phase Difference Corr...

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2016 IEEE International Conference on Power and Renewable Energy （ICPRE 2016）

作者： Feng Pan Qiang Song Guoying Lin Linglong Li Electric Power Research Institute of Guangdong Power Grid Corporation School of Electrical and Electronic Engineering Huazhong University of Science and Technology

The paper presents a discrete spectrum analyzing method based on DFT, which can effectively reduce the phase error by choosing the window function with a real even function that has the linear phase spectrum. Since the traditional DFT algorithm could result in larger measurement error because of the spectral leakage and fence effect, the phase difference correction algorithm is proposed to cope with the problem. The simulation results indicate that the correction algorithm with Hanning window function can effectively improve the metering precision.

关键词： phase difference correction algorithm window function frequency fluctuation DFT

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Calculating the Leaf-Area Based on Non-Loss correction algorithm

Calculating the Leaf-Area Based on Non-Loss Correction Algor...

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2010 International Conference of Informationa Science and Management Engineering(2010年信息科学与管理工程国际学术会议 ISME 2010)

作者： Tan Feng Wang Chun College of Information and Technology Heilongjiang Bayi Agricultural University DaQing China College of Engineering Heilongjiang Bayi Agricultural University DaQing China

In order to realize non-lost measurement of Characters on plant leaves , a method based bilinear mapping has been advanced. Firstly, Bilinear space transformation is used to mapping the pixels position between distortion image and original image, secondly, calculating the value of leaf-area and related values. The validity of measurement has not been influenced by size and figure differentia, the experiment shows that distort image of plant leaves can be corrected, and effective area can be extracted commendably, the accuracy can reach to more than 99％ when using this method to correct the images of plant leaves, the results shows that the method of technology of computer vision is accurate, simple and convenient in measuring leaf area , which is very important to the collecting and use of plant information of digital agriculture.

关键词： Image Processing Soybean Plant leaves Theory of Bilinear mapping correction algorithm

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