Yigang Wang

Collaborative Innovation Center of Advanced Microstructures

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Xiao-Diao Chen

Hangzhou Dianzi University

Bin Chen

Nanjing University of Aeronautics and Astronautics

Xiaodong Zhu

Jilin University

Keliang Zhou

Jiangxi University of Science and Technology

Bin Zhang

University of South Carolina

Wanbin Pan

University of Science and Technology of China

Xuesong Yin

Hangzhou Dianzi University

Zizhao Wu

Hangzhou Dianzi University

Danwei Wang

Nanyang Technological University

Yongqiang Ye

Nanjing University of Aeronautics and Astronautics

Cooperative Institutions

Zhejiang University

Hangzhou Dianzi University

Chinese Academy of Sciences

Nanjing University

Shanghai Jiao Tong University

Tsinghua University

University of Chinese Academy of Sciences

Ningbo University

Nanjing University of Aeronautics and Astronautics

Fudan University

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3D Hydro Environmental Model of Dissolved Oxygen Distribution in Yangtze Estuary

Springer eBooks (2009)

Yigang Wang Xi Li

Contour line

Yangtze river

Biochemical oxygen demand

10.1007/978-3-540-89465-0_119

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Citations (6)

Millimeter-wave fixed-tuned subharmonic mixers with planar Schottky diodes

Journal of Semiconductors (2012)

Changfei Yao Ming Zhou Yunsheng Luo Yigang Wang Conghai Xu

Two different frequency bandwidth subharmonic mixers (SHM) using planar Schottky mixing diodes are discussed and fabricated. Full-wave analysis is carried out to find the optimum diode embedding impedances with a lumped port for modeling the nonlinear junction. The SHM circuit is divided into several different parts and each part is optimized using the calculated diode impedances. The divided parts are then combined and optimized together. The exported S-parameter files of the global circuit are used for conversion loss (CL) discussion. For the 150 GHz SHM, the lowest measured CL is 10.7 dB at 153 GHz, and typical CL is 12.5 dB in the frequency range of 135–165 GHz. The lowest measured CL of the 180 GHz SHM is 5.8 dB at 240 GHz, and typical CL is 13.5 dB and 11.5 dB in the frequency range of 165–200 GHz and 210–240 GHz, respectively.

Subharmonic

Extremely high frequency

Varicap

10.1088/1674-4926/33/11/115007

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Citations (3)

<title>Selective refinement of progressive meshes using vertex hierarchies</title>

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2003)

Yigang Wang Bernd Froehlich Martin Goebel

This paper presents a general method for selectively refining or coarsening progressive meshes. Our method works for arbitrary meshes, deals with non-manifolds, and allows the change of manifold and genus properties of the mesh. We introduce new definitions for edge contraction and expansion operations, which make solely use of the vertex hierarchy. These definitions in conjunction with their legal conditions lead to many provable properties of the refinement process. In addition, we propose a locally re-stripping method to dynamically generate the strips during selective refinements, which efficiently forms strips for meshes coarsening or refining process.

STRIPS

Edge contraction

Manifold (fluid mechanics)

10.1117/12.497741

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Laguerre based adaptive control of piezoelectric actuator for nanopositioning

2021 60th IEEE Conference on Decision and Control (CDC) (2010)

Yigang Wang Kevin C. Chu Herrick L. Chang Tsu‐Chin Tsao

This paper considers the Laguerre based adaptive control of piezoelectric actuator for nanopositioning. Laguerre-based adaptive filters provide an attractive alternative to adaptive FIR filters in the sense that they provide better approximation of system with a long impulse response with a restricted order. Laguerre also keeps many of the advantages of adaptive FIR filter, such as unique global minimum and guaranteed stability. In this paper, the Laguerre based model matching problem is studied. A better optimal solution can be achieved by proper chosen pole location of all-pass filter in Laguerre filter. The Least-Mean-Square (LMS) algorithm based on Laguerre structure is then discussed. The results show that with same step size constraint, the Laguerre based LMS algorithm introduces less excessive mean-square-error. The Laguerre-based LMS algorithm is then applied to the adaptive control for reference tracking. Due to the model mismatch, the traditional adaptive feed-forward structure is modified to the adaptive inverse control structure for better tracking performance. The proposed approach is implemented in FPGA with 100 kHz sampling rate and applied to piezoelectric actuator for nanopositioning. Experimental results show effectiveness of the proposed approach.

Laguerre polynomials

Finite impulse response

10.1109/cdc.2010.5718127

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Extending Intelligent Space with Ubiquitous Computing Technology: the Rich Servants Service Model

Tingting Fu Yigang Wang Huaidong Shi Hao Fu

With the rapid development of embedded system, distributed and mobile computing technologies, more and more intelligent space are establishing around us, such as smart meeting room, smart home, intelligent museum, digital library and so on. Meanwhile, ubiquitous computing has received an intensive interest in the past years. Many models have been proposed. How to utilize these models to enhance those intelligent spaces is a challenging research problem. We have introduced the prototype of rich servants service (RSS) model (Shi et al., 2007). In this paper, we will extend the RSS model to fulfill those intelligent spaces. The model defines elements, interfaces, agents, services discovery and other facts related to the system. Through a case, we show how to combine the RSS model with real-world applications.

RSS

Service model

Ambient Intelligence

Urban Computing

10.1109/icnsc.2008.4525525

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One-Step Leapfrog LOD-BOR-FDTD Algorithm with CPML Implementation

International Journal of Antennas and Propagation (2016)

Yigang Wang Yun Yi Bin Chen Hailin Chen Kang Luo

An unconditionally stable one-step leapfrog locally one-dimensional finite-difference time-domain (LOD-FDTD) algorithm towards body of revolution (BOR) is presented. The equations of the proposed algorithm are obtained by the algebraic manipulation of those used in the conventional LOD-BOR-FDTD algorithm. The equations forz-direction electric and magnetic fields in the proposed algorithm should be treated specially. The new algorithm obtains a higher computational efficiency while preserving the properties of the conventional LOD-BOR-FDTD algorithm. Moreover, the convolutional perfectly matched layer (CPML) is introduced into the one-step leapfrog LOD-BOR-FDTD algorithm. The equation of the one-step leapfrog CPML is concise. Numerical results show that its reflection error is small. It can be concluded that the similar CPML scheme can also be easily applied to the one-step leapfrog LOD-FDTD algorithm in the Cartesian coordinate system.

Perfectly Matched Layer

10.1155/2016/8402697

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Citations (3)

A Parfocality Measurement Method of a Continuous Zoom Stereo Microscope

International Journal on Smart Sensing and Intelligent Systems (2013)

Yigang Wang Gangyi Jiang Mei Yu Feng Shao Yuan Wang

Abstract To satisfy the demands of the continuous zoom stereo microscope, a parfocality measurement method is proposed. First, the mechanical parameters of the focusing system are estimated by testing the highest and the lowest displacements of the lens group and the rotation angle of the knob simultaneously. Second, by analyzing images captured under different zoom rates, the relatively sharpest displacement under a specified zoom rate is obtained according to the values of the four definition functions, including the variance function, the gradient square function, the discrete Fourier transform function and the Walsh-Hadamard transform function. Then, an in-focus model is presented and implemented to determine whether or not the relatively sharpest displacement under a specified zoom rate is an in-focus displacement, and to obtain the discrete in-focus displacements under multirates. Finally, by using discrete in-focus displacements, a continuous zoom in-focus curve is fitted. Results from the experiments show that the proposed method can accurately and effectively measure the parfocality of a continuous zoom stereo microscope.

Zoom lens

10.21307/ijssis-2017-597

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Towards GUI test based on interactive event-flow model

International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (2012)

Yongjie Xu Xiaodong Zhu Yigang Wang

Event-flow model is a GUI testing model that describes the immediate execution relationship between GUI events, while GUI is based on event-driven mode. To improve the relationship between GUI events, information to describe the interactive relationship between GUI events is added in the event-flow model. The interactive relationship is based on sharing variables or exchanging messages. Then, an algorithm is given to generate effective and interactive GUI test cases based on interactive event-flow model, and the result of an experiments shows that this method obviously reduced the number of GUI test cases.

Graphical user interface

10.1109/icqr2mse.2012.6246224

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Citations (1)

Visual aggregation of large multivariate networks with attribute-enhanced representation learning

Neurocomputing (2022)

Yuhua Liu Miaoxin Hu Rumin Zhang Ting Xu Yigang Wang

Abstraction

Closeness

Representation

10.1016/j.neucom.2022.04.110

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Citations (3)

An Automatic Texture Generation Algorithm for 3D Shapes Based on cGAN

Journal of Physics Conference Series (2019)

Xiao Huang Yigang Wang Zizhao Wu

Abstract Texturing 3D shapes is of great importance in computer graphics with applications ranging from game design to augmented reality. However, the processes of texture generation are usually tedious, time-consuming and labor-intensive. In this paper, we propose an automatic texture generation algorithm for 3D shapes based on conditional Generative Adversarial Networks (cGAN). The core of our algorithm includes sampling the model outline and building a cGAN in order to generate model textures automatically. In particular, we propose a novel edge detection method using 3D model information which can accurately find the outline of the model to improve the quality of the generated texture. Due to the adaptability of the algorithm, our approach is suitable for texture generation for most 3D models. Experimental results show the efficiency of our algorithm which can easily generate high quality model textures.

Texture (cosmology)

Adaptability

Texture Synthesis

10.1088/1742-6596/1335/1/012006

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Citations (1)