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Peize Zhang, Haiming Wang, Wei Hong,pzzhang@seu.edu.cn,hmwang@seu.edu.cn,weihong@seu.edu.cn
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 4, Pages 471-487 doi: 10.1631/FITEE.2000489
Keywords： 毫米波通信；分簇；绕射；多路通道；传播测量
100 Years of Gear Measurement Technology——Review & Prospect
Shi Zhaoyao,Fei Yetai,Xie Huakun
Strategic Study of CAE 2003, Volume 5, Issue 9, Pages 13-17
The evolution of gear measurement technology in the past 100 years is fully reviewed, and 6 key issues related to gear metrology are listed. Emphases are laid on the development of gear measurement principles, the evolution of technical measures realizing them and the interpretation & utilization of measurement results. Meanwhile, the principle, configuration and features of present-day CNC Gear Measuring Center are introduced. A few of new phenomena in the field of gear measurement technology are remarked, and some research topics in the near future are proposed.
Keywords： gear gear measurement gear deviation gear measuring instrument
Performance Analysis and Evaluation of Geometric Parameters in Stereo Deflectometry Article
Yongjia Xu, Feng Gao, Xiangqian Jiang
Engineering 2018, Volume 4, Issue 6, Pages 806-815 doi: 10.1016/j.eng.2018.10.007
This paper presents a novel geometric parameters analysis to improve the measurement accuracy of stereo deflectometry. Stereo deflectometry can be used to obtain form information for freeform specular surfaces. A measurement system based on stereo deflectometry typically consists of a fringe-displaying screen, a main camera, and a reference camera. The arrangement of the components of a stereo deflectometry system is important for achieving high-accuracy measurements. In this paper, four geometric parameters of a stereo deflectometry system are analyzed and evaluated: the distance between the main camera and the measured object surface, the angle between the main camera ray and the surface normal, the distance between the fringe-displaying screen and the object, and the angle between the main camera and the reference camera. The influence of the geometric parameters on the measurement accuracy is evaluated. Experiments are performed using simulated and experimental data. The experimental results confirm the impact of these parameters on the measurement accuracy. A measurement system based on the proposed analysis has been set up to measure a stock concave mirror. Through a comparison of the given surface parameters of the concave mirror, a global measurement accuracy of 154.2 nm was achieved.
Keywords： Optical metrology Error analysis Stereo deflectometry Three-dimensional shape measurement Performance evaluation Simulation
Study on Several Radio Propagation Models in ITU - R Recommendations
Zhang Minggao
Strategic Study of CAE 2000, Volume 2, Issue 7, Pages 74-78
Studies are presented on five radio propagation models in ITU - R recommendations. The mcxlels include statistical prediction method for tropospheric scatter transmission loss, prediction method for sea reflection fading in maritime mobile satellite telecommunications, conversion method for ionosphereic scintillation fading, simplified prediction method for attenuation by atmospheric gases and modified prediction method for field strength in land mobile services.
Keywords： radio propagation tropospheric scatter sea reflection ionospheric scintillation attenuation by atmospheric gases
Appication of digital photogrammetry grid in the fast response for Wenchuan Earthquake rescue
Zhang Zuxun,Ke Tao,Guo Dahai,Wang Jianchao
Strategic Study of CAE 2009, Volume 11, Issue 6, Pages 54-62
The aerial photogrammetry is the main method of surveying and mapping, and it can mosaic thousands of aerial images into the ortho-image and provide us detailed information about the disaster area. But the traditional Digital Photogrammetry Workstation (DPW) is based on serial computing and cannot process the unconventional aerial photogrammetry data, so it cannot meet the needs of high production efficiency and rapid respond. The paper introduces the application of Digital Photogrammetry Grid System in the fast response for China earthquake rescue, and discusses its distributed computing technique and key analyses method for unconventional aerial photogrammetry data.
Keywords： aerial photogrammetry DPGrid China earthquake rescue fast response
Editorial for the Special Issue on Geodesy and Survey Engineering
Jiancheng Li
Engineering 2020, Volume 6, Issue 8, Pages 847-848 doi: 10.1016/j.eng.2020.07.011
Faster Than Light and EM-Wave Anomalous Propagation
Huang Zhixun
Strategic Study of CAE 2000, Volume 2, Issue 10, Pages 80-92
In this paper, the historic background of the study on faster than light (FTL) and the possibility of working within the frame work of special relativity are discussed. The previous experimental studies with single photon, laser pulse and microwaves have revealed superluminal behavior in the quantum tunneling process. That phenomenon exists only in the case of special physical condition. The analogy between classical Telegraphist equation and Klein-gordon equation can be used to study particle tunneling and superluminal behavior. A discussion on the FTL experiment by Dr. L. Wang recently is included. Remarks on the future of FTL research is given in this article.
Keywords： faster than light microwave anomalous propagation tachyon quantum tunneling process e-vanescent mode negative group velocity
A Spatial–Temporal Network Perspective for the Propagation Dynamics of Air Traffic Delays Article
Qing Cai, Sameer Alam, Vu N. Duong
Engineering 2021, Volume 7, Issue 4, Pages 452-464 doi: 10.1016/j.eng.2020.05.027
Intractable delays occur in air traffic due to the imbalance between ever-increasing air traffic demand and limited airspace capacity. As air traffic is associated with complex air transport systems, delays can be magnified and propagated throughout these systems, resulting in the emergent behavior known as delay propagation. An understanding of delay propagation dynamics is pertinent to modern air traffic management. In this work, we present a complex network perspective of delay propagation dynamics. Specifically, we model air traffic scenarios using spatial-temporal networks with airports as the nodes. To establish the dynamic edges between the nodes, we develop a delay propagation method and apply it to a given set of air traffic schedules. Based on the constructed spatial–temporal networks, we suggest three metrics—magnitude, severity, and speed—to gauge delay propagation dynamics. To validate the effectiveness of the proposed method, we carry out case studies on domestic flights in the Southeastern Asia region (SAR) and the United States. Experiments demonstrate that the propagation magnitude in terms of the number of flights affected by delay propagation and the amount of propagated delays for the US traffic are respectively five and ten times those of the SAR. Experiments further reveal that the propagation speed for US traffic is eight times faster than that of the SAR. The delay propagation dynamics reveal that about six hub airports in the SAR have significant propagated delays, while the situation in the United States is considerably worse, with a corresponding number of around 16. This work provides a potent tool for tracing the evolution of air traffic delays.
Keywords： Air traffic Transport systems Delay propagation dynamics Spatial–temporal networks
Antimicrobial Resistance Exchange Between Humans and Animals: Why We Need to Know More Views & Comments
Julian Parkhill
Engineering 2022, Volume 15, Issue 8, Pages 11-12 doi: 10.1016/j.eng.2022.04.007
Research on the data processing methods of airborne vector gravimetry using SINS/GNSS
Ning Jinsheng
Strategic Study of CAE 2014, Volume 16, Issue 3, Pages 4-13
Airborne vector gravimetry is an advanced and efficient technology to determine high frequency information of earth’s gravity field in the future，and is a complement to ground gravimetry，marine gravimetry and satellite gravimetry. The principle of airborne vector gravimetry using SINS（strapdown inertial navigation system）/GNSS（global navigation satellite systems）is introduced in the paper，and then the data preprocessing，data reduction，band-limited topographical effect and downward continuation are discussed，as well as the geoid determination from airborne vector gravimetry. It provides the support for the development of airborne vector gravimetry in our country.
Keywords： airborne vector gravimetry SINS/GNSS data fusion earth gravity field geoid
Measurement and Information Technology
Zhang Guoxiong
Strategic Study of CAE 2000, Volume 2, Issue 3, Pages 62-66
Measurement is an important means for obtaining information in research and production. Both the quality of products and the productivity of production highly depend on measurement. An important trend in the development of measurement is its merging with information technology. The requirements in high accuracy of measurement, on-line and dynamic measurements, measurements of complicated parameters and under complex conditions and intelligent measurements ask for the merging of measurements with information technology. This merging is carried out through the whole process. Modulation and demodulation, data sampling and reconstruction, signal merging, data compression, filtering, signal transformation, time series analysis, spectrum analysis, data fitting and modeling, pattern recognition, neural network, simulation and virtual measurement, error separation, error compensation, redundancy technique, decision making, intelligent techniques, etc. , are widely used in measurements. Some practical examples of this merging are given in the paper. The accuracy of coordinate measuring machines (CMMs) can be greatly enhanced by using error compensation technique. Modeling, error calibration and compensation software are three key techniques in error compensation of CMMs. Applications of redundancy technique in roundness and spindle error motion measurement, in large scale metrology are presented as well. Redundancy technique provides a powerful means in optimization of measurements, system self-calibration, error compensation, recovering the lost information and many other applications.
Keywords： measurement information technology error compensation modeling redundancy technique error separation
Error analysis and compensation of compound measuring system for blade surface
Li Bing,Chen Lei,Ding Jianjun,Jiang Zhuangde
Strategic Study of CAE 2013, Volume 15, Issue 1, Pages 39-44
The high-accuracy measurement of complex airfoil surfaces is a critical issue in the inspection of blades. Aiming at this problem, a compound measuring principle is proposed in this paper. Using the principle, the airfoil surface and root datum of a blade are measured based on contact inductance method and non-contact laser triangular method, respectively. And a four-coordinate measuring system is designed and established. Then, on the basis of the mechanical structure of the measuring system, the geometric error of which is analyzed syste-matically. And a corresponding extraction and compensation method is proposed based on the laser interferometry. The experimental results show that the proposed error analysis and compensation methods can improve the accuracy of the four-coordinate measuring system effectively.
Keywords： blade airfoil surface compound measuring principle error analysis error compensation laser interferometry
Construction survey technology on concrete construction of Three Gorges Project ship lift tower
Luo Chen,Yan Chunbo
Strategic Study of CAE 2013, Volume 15, Issue 9, Pages 97-101
Three Gorges Project vertical ship lift is high-walled tower structure. According to the precision requirements of construction for concrete body and built-in embedded parts, the plane, elevation datum transmission and positioning measurement methods for embedded parts in construction survey of concrete and built-in embedded parts of Three Gorges Project ship lift tower were studied. The construction survey technologies, including zenith telescope planar cast point, electromagnetic distance measuring and cylindrical nut type positioning device with a sighting mark in center are applied to size-control measurement for concrete structure and positioning measurement for built-in embedded parts respectively. Through the statistical analysis on the measured data, the construction survey technology solutions for concrete construction of Three Gorges Project ship lift tower are proved to be reliable and feasible.
Keywords： construction survey zenith telescope cast point electromagnetic distance measuring spatial positioning measurement for casing Three Gorges Project ship lift
Improved binary similarity measures for software modularization Article
Rashid NASEEM, Mustafa BinMat DERIS, Onaiza MAQBOOL, Jing-peng LI, Sara SHAHZAD, Habib SHAH
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 8, Pages 1082-1107 doi: 10.1631/FITEE.1500373
Keywords： Binary similarity measure Binary features Combination of measures Software modularization
A Local Quadratic Embedding Learning Algorithm and Applications for Soft Sensing Article
Yaoyao Bao, Yuanming Zhu, Feng Qian
Engineering 2022, Volume 18, Issue 11, Pages 186-196 doi: 10.1016/j.eng.2022.04.025
Inspired by the tremendous achievements of meta-learning in various fields, this paper proposes the local quadratic embedding learning (LQEL) algorithm for regression problems based on metric learning and neural networks (NNs). First, Mahalanobis metric learning is improved by optimizing the global consistency of the metrics between instances in the input and output space. Then, we further prove that the improved metric learning problem is equivalent to a convex programming problem by relaxing the constraints. Based on the hypothesis of local quadratic interpolation, the algorithm introduces two lightweight NNs; one is used to learn the coefficient matrix in the local quadratic model, and the other is implemented for weight assignment for the prediction results obtained from different local neighbors. Finally, the two sub-models are embedded in a unified regression framework, and the parameters are learned by means of a stochastic gradient descent (SGD) algorithm. The proposed algorithm can make full use of the information implied in target labels to find more reliable reference instances. Moreover, it prevents the model degradation caused by sensor drift and unmeasurable variables by modeling variable differences with the LQEL algorithm. Simulation results on multiple benchmark datasets and two practical industrial applications show that the proposed method outperforms several popular regression methods.
Keywords： Local quadratic embedding Metric learning Regression machine Soft sensor
Title Author Date Type Operation
Radio propagation measurement and cluster-based analysis for millimeter-wave cellular systems in dense urban environments
Peize Zhang, Haiming Wang, Wei Hong,pzzhang@seu.edu.cn,hmwang@seu.edu.cn,weihong@seu.edu.cn
Journal Article
100 Years of Gear Measurement Technology——Review & Prospect
Shi Zhaoyao,Fei Yetai,Xie Huakun
Journal Article
Performance Analysis and Evaluation of Geometric Parameters in Stereo Deflectometry
Yongjia Xu, Feng Gao, Xiangqian Jiang
Journal Article
Appication of digital photogrammetry grid in the fast response for Wenchuan Earthquake rescue
Zhang Zuxun,Ke Tao,Guo Dahai,Wang Jianchao
Journal Article
A Spatial–Temporal Network Perspective for the Propagation Dynamics of Air Traffic Delays
Qing Cai, Sameer Alam, Vu N. Duong
Journal Article
Antimicrobial Resistance Exchange Between Humans and Animals: Why We Need to Know More
Julian Parkhill
Journal Article
Research on the data processing methods of airborne vector gravimetry using SINS/GNSS
Ning Jinsheng
Journal Article
Error analysis and compensation of compound measuring system for blade surface
Li Bing,Chen Lei,Ding Jianjun,Jiang Zhuangde
Journal Article
Construction survey technology on concrete construction of Three Gorges Project ship lift tower
Luo Chen,Yan Chunbo
Journal Article
Improved binary similarity measures for software modularization
Rashid NASEEM, Mustafa BinMat DERIS, Onaiza MAQBOOL, Jing-peng LI, Sara SHAHZAD, Habib SHAH
Journal Article
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