Search scope:
排序： Display mode:
A compact ultra-wideband crossed-dipole antenna for 2G/3G/4G/IMT/5G customer premise equipment applications Correspondences
Jingli GUO, Lun CUI, Ying LIU, Baohua SUN, Xiaofeng LI,guojl@xidian.edu.cn,ID_CLXX@163.com
Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 2, Pages 339-345 doi: 10.1631/FITEE.2000456
Keywords： 5G；交叉振子；双极化天线；终端天线；超宽带
A novel algorithm to counter cross-eye jamming based on a multi-target model Research Articles
Zhi-yong SONG, Xing-lin SHEN, Qiang FU
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 7, Pages 988-1001 doi: 10.1631/FITEE.1800394
Cross-eye jamming is an electronic attack technique that induces an angular error in the monopulse radar by artificially creating a false target and deceiving the radar into detecting and tracking it. Presently, there is no effective anti-jamming method to counteract cross-eye jamming. In our study, through detailed analysis of the jamming mechanism, a multi-target model for a cross-eye jamming scenario is established within a random finite set framework. A novel anti-jamming method based on multitarget tracking using probability hypothesis density filters is subsequently developed by combining the characteristic differences between target and jamming with the releasing process of jamming. The characteristic differences between target and jamming and the releasing process of jamming are used to optimize particle partitioning. Particle identity labels that represent the properties of target and jamming are introduced into the detection and tracking processes. The release of cross-eye jamming is detected by estimating the number of targets in the beam, and the distinction between true targets and false jamming is realized through correlation and transmission between labels and estimated states. Thus, accurate tracking of the true targets is achieved under severe jamming conditions. Simulation results showed that the proposed method achieves a minimum delay in detection of cross-eye jamming and an accurate estimation of the target state.
Keywords： Particle identity labels Probability hypothesis density Cross-eye jamming Anti-jamming Random finite set Monopulse radar
Editorial for the Special Issue on Energetic Materials and Interdisciplinary Sciences
Xuguang Wang, James Short
Engineering 2020, Volume 6, Issue 9, Pages 957-957 doi: 10.1016/j.eng.2020.08.002
Fire Safety Science——A Promising and Interdisciplinary Engineering Scientific Field
Fan Weicheng,Liu Naian
Strategic Study of CAE 2001, Volume 3, Issue 1, Pages 6-14
During the past several decades, much progress has been made in fire safety science which aims at understanding the complexities of fire behavior as well as providing the technological principle for fire safety engineering. In this paper, the background and history of fire safety science are reviewed, the major fire safety technological principles to be developed are summarized, and the significant fundamental research topics are outlined in detail.
Keywords： fire fire safety science interdisciplinary science
Zhou Wu,Lin Mingsen,Li Yanmin,Wang Zhenzhan and Huang Lei
Strategic Study of CAE 2013, Volume 15, Issue 7, Pages 75-80
HY-2A scanning microwave radiometer cold shy calibration method and Geophysical parameters retrieval algorithm were studied. According to HY-2A satellite scanning microwave radiometer on observation and scanning design principle and observation geometry, the earth's signal into cold reflector based on the earth observation data of microwave radiometer was corrected, and cold sky reflector weight coefficient matrix by the ground observation brightness temperature to correction cold sky observation signal was established. Based on the sea surface temperature, sea surface wind speed, moisture content and cloud liquid content and microwave radiometer radiative transfer model, HY-2A scanning microwave radiometer model theory brightness temperature under different conditions of each frequency and polarization was calculated, and a linear regression model was established to fit different geophysical parameters retrieval coefficient, using multiple linear regression algorithm retrieving HY-2A microwave scanning radiometer geophysical parameters, compared to international microwave radiometer data, and the product accuracy was obtained.
Keywords： scanning microwave radiometer multiple linear regression multi satellites cross over cold shy calibration
Development of space-based diffractive telescopes Review Article
Wei Zhao, Xin Wang, Hua Liu, Zi-feng Lu, Zhen-wu Lu,wangxin971241@163.com,liuhua_rain@aliyun.com
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 6, Pages 809-962 doi: 10.1631/FITEE.1900529
Keywords： 薄膜衍射光学元件；衍射望远系统；超大口径
Zhu Xuewang,Liu Qinglin
Strategic Study of CAE 2008, Volume 10, Issue 10, Pages 36-41
The contribution level of cross modality to vibration response of structure is governed by damp and modality. The larger the damping and the denser the modality, the higher the contribution. In engineering vibration analysis' a system hypothesis with lightly damping and sparse modality is generally applied to solve approximately vibration response of structure where the contribution of cross modality is neglected due to the contribution small enough. Approximate solution of displacement response can satisfy engineering requirement with certain precision but the error between approximate response and exact one, maybe tiny, can heavily effect the peak frequency and irregular factors of spectral diagram in time domain vibration analysis and change the results of fatigue damage accumulation identification. With a simple supported beam in this paper the contribution of cross modality to fatigue damage accumulation is investigated. Random response is obtained by means of superposition methods and fatigue damage accumulation of structure under random vibration is analysised with Miner's linear damage ruler. Numerical simulation shows that the contribution of cross modality to fatigue damage accumulation of structure can not be neglected even if the structure is characterized with lightly damping and sparse modality.
Keywords： cross modality random vibration fatigue damage accumulation random vibration response modality superposition lightly damping and sparse modality system
Modern Advances in Neutrino Researches
Huang Zhixun
Strategic Study of CAE 2002, Volume 4, Issue 10, Pages 90-93
Work on neutrino's mass has been going on in Japan and several other countries since the early work of V. Lubimov in USSR inl980 and that of a work with W. Kundig at Zurich University inl986. At the present time, there are several laboratories concerned with the research aspects of such particles. It among the advances of all sorts of neutrinos, two main cruxes should be considered for this subject. One is that the similarity between the photon and the neutrino, the other is that the very interesting superluminal theory for neutrinos.
Keywords： neutrino faster than light (superluminal) tachyon photon
Development Strategy of “New Medicine” Under the Background of Healthy China
He Ke, Wang Ling
Strategic Study of CAE 2019, Volume 21, Issue 2, Pages 98-102 doi: 10.15302/J-SSCAE-2019.02.007
This paper starts with the connotation of “new medicine” under the background of Healthy China, focuses on the “new medicine” talent training system, and illustrates the necessity and urgency of developing “new medicine” from three aspects, which are new strategic requirements for serving China’s health construction, external demands for meeting the country’s transformation and development, and internal demands for meeting the medical reform. This paper further elaborates the basic strategy of “1234” for developing “new medicine”, namely, adhering to the “new concept” of “one center”, establishing the “new quality” of “two types of balance”, promoting the “new system” of “three coordinations”, and strengthening the “new model” of “four kinds of crossing”. And this paper suggests that we should actively seek for strong support from government departments, comprehensively promote the overall development of medical personnel, and accelerate innovation in interdisciplinary integration, thus to provide useful reference for high-level medical personnel training in China.
Keywords： healthy China new medicine interdisciplinary integration
Xiaohua Yu, Paulos Y. Mengsteab, Ganesh Narayanan, Lakshmi S. Nair, Cato T. Laurencin
Engineering 2021, Volume 7, Issue 2, Pages 153-161 doi: 10.1016/j.eng.2020.02.010
We have previously developed a poly(L-lactic) acid (PLLA) bioengineered anterior cruciate ligament (ACL) matrix that has demonstrated enhanced healing when seeded with primary ACL cells prior to implantation in a rabbit model, as compared with the matrix alone. This suggests that improving cell adhesion on the matrix may beneficially affect the healing response and long-term performance of the bioengineered ACL matrix. One regenerative engineering approach involves enhancing the surface properties of the matrix to support cell adhesion and growth in combination with point-of-care stem cell therapy. Herein, we studied the cell adhesion properties of PLLA braided microfiber matrices enhanced through the physical adsorption of fibronectin and air plasma treatment. We evaluated the kinetics and binding efficiency of fibronectin onto matrices at three time points and three fibronectin concentrations. Incubating the matrix for 120 min in a solution of 25 μg·mL−1 fibronectin achieved the greatest binding efficiency to the matrix and cellular adhesion. Exposing the matrices to air plasma treatment for 5 min before fibronectin adsorption significantly enhanced the cell adhesion of rabbit bone marrow-derived mesenchymal stem cells (R-BMMSCs) 24 h post cell seeding. Finally, cellular proliferation was monitored for up to 21 d, the matrices were exposed to air plasma treatment, and fibronectin adsorption was found to result in enhanced cell number. These findings suggest that exposure to air plasma treatment and fibronectin adsorption enhances the cellular adhesion of PLLA braided microfiber matrices and may improve the clinical efficacy of the matrix in combination with point-of-care stem cell therapies.
Keywords： Anterior cruciate ligament Ligament Poly(L-lactic) acid plasma treatment Fibronectin Stem cells Adhesion
A Comparative Assessment of Aerodynamic Models for Buffeting and Flutter of Long-Span Bridges
Igor Kavrakov, Guido Morgenthal
Engineering 2017, Volume 3, Issue 6, Pages 823-838 doi: 10.1016/j.eng.2017.11.008
Wind-induced vibrations commonly represent the leading criterion in the design of long-span bridges. The aerodynamic forces in bridge aerodynamics are mainly based on the quasi-steady and linear unsteady theory. This paper aims to investigate different formulations of self-excited and buffeting forces in the time domain by comparing the dynamic response of a multi-span cable-stayed bridge during the critical erection condition. The bridge is selected to represent a typical reference object with a bluff concrete box girder for large river crossings. The models are viewed from a perspective of model complexity, comparing the influence of the aerodynamic properties implied in the aerodynamic models, such as aerodynamic damping and stiffness, fluid memory in the buffeting and self-excited forces, aerodynamic nonlinearity, and aerodynamic coupling on the bridge response. The selected models are studied for a windspeed range that is typical for the construction stage for two levels of turbulence intensity. Furthermore, a simplified method for the computation of buffeting forces including the aerodynamic admittance is presented, in which rational approximation is avoided. The critical flutter velocities are also compared for the selected models under laminar flow.
Keywords： Buffeting Flutter Long-span bridges Bridge aerodynamics Bridge aeroelasticity Erection stage
Prospects of Photovoltaic Technology
Zhenguo Li
Engineering 2023, Volume 21, Issue 2, Pages 28-31 doi: 10.1016/j.eng.2022.07.008
Advances of ecological restoration of lakeside zone
Chai Peihong,Dai Yanran,Liang Wei,Cheng Shuiping,Wu Zhenbin
Strategic Study of CAE 2010, Volume 12, Issue 6, Pages 32-35
In this paper, the definition and function, together with the different stages of restoration and management methods of lakeside zone were introduced. The research status and prospects were summarized.
Keywords： lakeside zone ecological restoration research advances prospect
The Next Breakthroughs of Artificial Intelligence: The Interdisciplinary Nature of AI
Yueting Zhuang, Ming Cai, Xuelong Li, Xiangang Luo, Qiang Yang, Fei Wu
Engineering 2020, Volume 6, Issue 3, Pages 245-247 doi: 10.1016/j.eng.2020.01.009
Multi-stage Model Updating Method via Substructure Analysis
Guo Li,Li Zhaoxia,Chen Hongtian
Strategic Study of CAE 2006, Volume 8, Issue 9, Pages 42-48
Basing on substructure analysis, original research on multi-stage model updating method (MSMUM) is presented to reduce the uncertainties in traditional model updating process. The kernel philosophy of the multi-stage model updating method is used to update a complicated FE model with multi steps, i. e. firstly localize the model errors and then update the error parameters. Comparing with the computed results, it is shown that the error localization methods and the parameter updating methods developed here are fine. As a case study, the model of the Runyang Nancha suspension bridge tower is updated with the MSMUM. Comparing the updated FE model here with the updated model using traditional updating method, it could be concluded that the multi-stage updating method is more effective.
Keywords： model updating substructure error localization parameters updating Runyang Bridge
Title Author Date Type Operation
A compact ultra-wideband crossed-dipole antenna for 2G/3G/4G/IMT/5G customer premise equipment applications
Jingli GUO, Lun CUI, Ying LIU, Baohua SUN, Xiaofeng LI,guojl@xidian.edu.cn,ID_CLXX@163.com
Journal Article
A novel algorithm to counter cross-eye jamming based on a multi-target model
Zhi-yong SONG, Xing-lin SHEN, Qiang FU
Journal Article
Editorial for the Special Issue on Energetic Materials and Interdisciplinary Sciences
Xuguang Wang, James Short
Journal Article
Fire Safety Science——A Promising and Interdisciplinary Engineering Scientific Field
Fan Weicheng,Liu Naian
Journal Article
Study of cold sky calibration and geophysical parameters retrieval for HY-2A satellite scanning microwave radiometer
Zhou Wu,Lin Mingsen,Li Yanmin,Wang Zhenzhan and Huang Lei
Journal Article
Development of space-based diffractive telescopes
Wei Zhao, Xin Wang, Hua Liu, Zi-feng Lu, Zhen-wu Lu,wangxin971241@163.com,liuhua_rain@aliyun.com
Journal Article
The contribution of cross modality to fatigue damage accumulation of structure subjected to random vibration
Zhu Xuewang,Liu Qinglin
Journal Article
Development Strategy of “New Medicine” Under the Background of Healthy China
He Ke, Wang Ling
Journal Article
Enhancing the Surface Properties of a Bioengineered Anterior Cruciate Ligament Matrix for Use with Point-of-Care Stem Cell Therapy
Xiaohua Yu, Paulos Y. Mengsteab, Ganesh Narayanan, Lakshmi S. Nair, Cato T. Laurencin
Journal Article
A Comparative Assessment of Aerodynamic Models for Buffeting and Flutter of Long-Span Bridges
Igor Kavrakov, Guido Morgenthal
Journal Article
Advances of ecological restoration of lakeside zone
Chai Peihong,Dai Yanran,Liang Wei,Cheng Shuiping,Wu Zhenbin
Journal Article
The Next Breakthroughs of Artificial Intelligence: The Interdisciplinary Nature of AI
Yueting Zhuang, Ming Cai, Xuelong Li, Xiangang Luo, Qiang Yang, Fei Wu
Journal Article
京公网安备 11010502051620号
