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Planar dual-polarized millimeter-wave shared-aperture array antenna with high band isolation Correspondence
Yuyan CAO, Zijun GUO, Zhangcheng HAO
Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 10, Pages 1568-1578 doi: 10.1631/FITEE.2200122
A planar millimeter-wave shared-aperture array antenna is proposed and designed in this paper. By composing the substrate integrated waveguide (SIW) and the stripline, the K-band antenna is embedded inside the Ka-band antenna to achieve a smaller size and a low profile by sharing an aperture. The Ka-band antenna radiates through the parallel slot pairs on the surface of the SIW cavities with horizontal polarization, while the K-band antenna radiates through the butterfly-shaped slots with vertical polarization, which are also designed on the surface. Then the two array antennas can radiate by sharing a common aperture with high isolation. To verify this idea, a prototype of an 8×8 shared-aperture array antenna has been designed with center frequencies of 19 and 30 GHz and fabricated using multilayer printed circuit board (PCB) technology. The measurement results show that the −10 dB impedance bandwidths in the K- and Ka-bands are 7.73% and >20%, and the corresponding isolations are higher than 60 and 44 dB, respectively. The proposed shared-aperture antenna has a small footprint, a low profile, and high isolation, and is a promising candidate to design compact millimeterwave wireless systems.
Keywords： 共口径；平面天线；高隔离度；基片集成波导
Design of the Optical System with Large Relative Aperture and Large Linear Field of View
Pan Junye
Strategic Study of CAE 2000, Volume 2, Issue 8, Pages 89-90
In this paper following discussion the author concluded that the optical system for IR detecting in the distance should be an total reflecting off-axis aspheric system with large relative aperture and large field of view. A system with diameter φ600 mm, f=1000 mm, and linear field of view ± 5° was designed.
Keywords： IR detecting relative aperture large field of view off-axis system aspheric surface
Application of the Chemical-Looping Concept for Azoetrope Separation Article
Xin Gao, Xueli Geng
Engineering 2021, Volume 7, Issue 1, Pages 84-93 doi: 10.1016/j.eng.2020.06.022
The need for the separation of azeotropic mixtures for the production of high-end chemicals and resource recovery has spurred significant research into the development of new separation methods in the chemical industry. In this paper, a green and sustainable method for azeotrope separation is proposed based on a chemical-looping concept with the help of reversible-reaction-assisted distillation. The central concept in the chemical-looping separation (CLS) method is the selection of a reactant that can react with the azeotrope components and can also be recycled by the reverse reaction to close the loop and achieve cyclic azeotrope separation. This paper aims to provide an informative perspective on the fundamental theory and applications of the CLS method based on the separation principle, reactant selection, and case analysis, for example, the separation of alkenes, alkane, aromatics, and polyol products. In summary, we provide guidance and references for chemical separation process intensification in product refining and separation from azeotropic systems for the development of a more sustainable chemical industry.
Keywords： Chemical-looping Azeotropes Reactive distillation Reactants screening Process intensification
Bioprinting of Small-Diameter Blood Vessels Review
Xia Cao, Sushila Maharjan, Ramla Ashfaq, Jane Shin, Yu Shrike Zhang
Engineering 2021, Volume 7, Issue 6, Pages 832-844 doi: 10.1016/j.eng.2020.03.019
There has been an increasing demand for bioengineered blood vessels for utilization in both regenerative medicine and drug screening. However, the availability of a true bioengineered vascular graft remains limited. Three-dimensional (3D) bioprinting presents a potential approach for fabricating blood vessels or vascularized tissue constructs of various architectures and sizes for transplantation and regeneration.
In this review, we summarize the basic biology of different blood vessels, as well as 3D bioprinting approaches and bioink designs that have been applied to fabricate vascular and vascularized tissue constructs, with a focus on small-diameter blood vessels.
Keywords： Bioprinting Small-diameter blood vessel Bioink Vascular engineering
Development Strategy for Integrated Rice Field Aquaculture
Ma Dawen,Qian Jing,Liu Jiashou and Gui Jianfang
Strategic Study of CAE 2016, Volume 18, Issue 3, Pages 96-100 doi: 10.15302/J-SSCAE-2016.03.016
Paddy field fish culture is a traditional integrated aquaculture method. During the past few years, many new integrated rice-fish aquaculture modes focusing on high-valued aquatic species have been adopted and resulted in significant economic, social and ecological results. In order to extend the experiences of integrated rice-fish aquaculture, the author presented two typical approaches for integrated rice-fish aquaculture in Hubei Province. The crayfish-rice co-culture has an average net profit of over 3 000 RMB for per acre, which is 3~4 times the profit of single rice planting. The turtle-crayfish-fish-rice aquaculture has an average net profit of nearly 10 000 planting. This paper also puts forward some suggestions for strengthening the industry, including enlarging planting and farming space, promoting industrial convergence and strengthening policy support.
Keywords： paddy field integrated rice field aquaculture crayfish-rice co-culture turtle-crayfish-fish-rice co-culture
High-Quality Development of China Railway Express Based on Win–Win Co-construction
Chen Yun, Lu Chunfang, Sheng Liming, Liu Yanhong
Strategic Study of CAE 2020, Volume 22, Issue 3, Pages 125-131 doi: 10.15302/J-SSCAE-2020.03.019
This paper expounds upon the economic function definition of China Railway Express in the new era and sorts out its current operating situation and major risks and challenges. The main influencing factors of China Railway Express toward high-quality development are analyzed, such as the trade environment and infrastructure construction along the line, international multilateral communication and cooperation, goods supply support and logistics service level, as well as market-oriented operation. The practice of China Railway Express toward high-quality development is deeply explored based on win–win co-construction, and three development paths are presented: to develop in the direction of growing support from hinterland areas, increasing importance of hubs and nodes, and improving route network; to implement the comprehensive development strategy of “train transportation + logistics hub construction+ supporting service capacity” ; and to build a multi-value chain of international trade, industrial upgrading, and financial services. Finally, this paper proposes safeguard measures from four aspects, namely strengthening coordination and cooperation and actively promoting customs clearance convenience; optimizing transportation organization and providing whole-process logistics services; improving price mechanism to attract multi-channel capital investment; promoting platform construction and strengthening talents as well as scientific and technological innovation, in order to provide reference for the boosting of the high-quality development of China Railway Express.
Keywords： win–win co-construction，China Railway Express，strategy of high-quality development
Featurematching using quasi-conformalmaps Article
Chun-xue WANG, Li-gang LIU
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 5, Pages 644-657 doi: 10.1631/FITEE.1500411
Keywords： Feature correspondence Quasi-conformal map Splitting method
Influence of motor cable on common-mode currents in an inverter-fed motor drive system None
Peng-kang XIE, Jia-zheng LU, Guo-zhu CHEN, Heng-lin CHEN
Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 2, Pages 273-284 doi: 10.1631/FITEE.1601518
Keywords： Common-mode currents Cable model Motor drive system Parameter extraction
Study on Co-Pyrolysis Characteristics of Biomass Components and Polyethylene by TG-MS
Fan Honggang,Gu Jing,Wang Yazhuo,Yuan Haoran,He Mingyang, Sun Fuan
Strategic Study of CAE 2018, Volume 20, Issue 3, Pages 102-108 doi: 10.15302/J-SSCAE-2018.03.015
In order to explore the synergetic effect and the variation of small molecule gas products in the co-pyrolysis process of main components of biomass with plastics , a thermogravimetry-mass spectrum (TG-MS) method was used to study the co-pyrolysis characteristics of cellulose, xylan, lignin with polyethylene. The blending ratio of each co-pyrolysis sample was 1∶1(w/w). The weight loss intervals of the single components and the mixed components were obtained by the TG experiment, and the theoretical and experimental values were obtained by fitting the TG data of the individual components. It can be confirmed that the synergetic effect exists in the process of co-pyrolysis , and this effect promotes the decomposition of the samples. MS experimental data shows that the presence of polyethylene could facilitate the decomposition of the biomass components and increase the yield of small molecule gas products during the process of co-pyrolysis. The production of H2O and CO2 in the small molecular products in the pyrolysis of cellulose with polyethylene was increased. The xylan and polyethylene will promote the decomposition of each other during the co-pyrolysis process, and the yield of H2O, CH4, H2 and C2H4 will be raised. The co-pyrolysis between lignin and polyethylene could promote the the yield of CO, C2H4 and H2.
Keywords： cellulose xylan lignin polyethylene co-pyrolysis
Xiao-Dong Mo, Xiao-Hui Zhang, Lan-Ping Xu, Yu Wang, Chen-Hua Yan, Huan Chen, Yu-Hong Chen, Wei Han, Feng-Rong Wang, Jing-Zhi Wang, Kai-Yan Liu, Xiao-Jun Huang
Engineering 2021, Volume 7, Issue 2, Pages 162-169 doi: 10.1016/j.eng.2020.12.005
We aimed to develop a disease risk comorbidity index (DRCI) based on disease risk index (DRI) and Hematopoietic Cell Transplantation-Specific Comorbidity Index (HCT-CI) in patients receiving haploidentical hematopoietic stem cell transplantation (haplo-HSCT). We identified the prognostic factors of disease-free survival (DFS) in a training subset (n = 593), then assigned a weighted score using these factors to the remaining patients (validation subset; n = 296). The multivariable model identified two independent predictors of DFS: DRI and HCT-CI before transplantation. In this scoring system, we assigned a weighted score of 2 to very high-risk DRI, and assigned a weighted score of 1 to high-risk DRI and intermediate- and high-risk HCT-CI (i.e., haplo-DRCI). In the validation cohort, the three-year DFS rate was 65.2% (95% confidence interval (CI), 58.2%–72.2%), 55.8% (95% CI, 44.9%–66.7%), and 32.0% (95% CI, 5.8%–58.2%) for the low-, intermediate-, and high-risk group, respectively (P = 0.005). Haplo-DRCI can also predict DFS in disease-specific subgroups, particularly in acute leukemia patients. Increasing score was also significantly predictive of increased relapse, increased non-relapse mortality (NRM), decreased DFS, and decreased overall survival (OS) in an independent historical cohort (n = 526). These data confirmed that haplo-DRCI could effectively risk stratify haplo-HSCT recipients and provide a tool to better predict who will best benefit from haplo-HSCT.
Keywords： Disease risk index Disease risk comorbidity index Hematopoietic cell transplantation comorbidity index Hematopoietic stem cell transplantation Haploidentical
Bai Yunxiang,Wu Guoliang,Zhang Chunfang,Gu Jin,Sun Yuping
Strategic Study of CAE 2014, Volume 16, Issue 7, Pages 79-83
PVP/EVAL blend membranes was prepared by blending of PVP with poly(ethylene-co-vinyl alcohol) (EVAL) via immersion precipitation and were used to separate the oil/water emulsion. The chemical structure, morphology, mechanical performance and hydrophilicity of PVP/EVAL blend membranes were characterized by FTIR-ATR, scanning electron microscopy, tension test and water contact angle measurement. The effect of PVP content on the separation performance of oil/water emulsion was investigated. The results indicate that PVP content had distinct effect on the morphology of PVP/EVAL membranes. The tensile strength and elongation at break of PVP/EVAL blend membrane with 10 wt% (the mass percent of PVP in the casting solution) PVP were 1.88 and 1.34 times, respectively, that of pure EVAL membrane. When the content of PVP increased to 4 wt%, oil/water emulsion flux of PVP/EVAL blend membrane were 1.81 times that of the pure EVAL membrane. The rejection ratio was 92.2 %, slightly higher than the pure EVAL membranes. When the content of PVP increased to 10 wt%, the flux recovery ratio after washing increased from 51 % to 77.98 %.
Keywords： PVP EVAL blend membrane oil/water separation immersion precipitation
Development Strategy for Co-mining of the Deep Mineral and Geothermal Resources
Cai Meifeng, Duo Ji, Chen Xiangsheng, Mao Jingwen, Tang Chun´an, Liu Zhiqiang, Ji Hongguang, Ren Fenhua, Guo Qifeng, Li Peng
Strategic Study of CAE 2021, Volume 23, Issue 6, Pages 43-51 doi: 10.15302/J-SSCAE-2021.06.006
Co-mining of the deep mineral and geothermal resources is crucial for the sustainable development of deep mining and provides a brand-new technical means for geothermal mining in deep high-temperature strata. In this article, we analyze the important values of the co-mining, introduce the current status of development and utilization of geothermal resources worldwide, and summarize the basic research progress of the co-mining in China. Subsequently, we analyze the technical and management challenges faced by the co-mining and establish a technical system that is urgently required for comprehensive development and utilization, which involves (1) the investigation and prospect judgment of the joint development and utilization of deep mineral and geothermal resources, (2) the excavation and construction of underground tunnels and chambers in high-temperature and hard rock strata, (3) the key theory and technical system of co-construction, coexistence, and sharing of a deep mineral resource exploitation system and a geothermal development system, and (4) the theories and technologies of geothermal energy exchange and transmission in the deep high temperature strata. Furthermore, development suggestions are proposed in terms of geological exploration, scientific and technological innovation, supporting policies, top-level planning, and scientific research demonstration bases; these aim to provide a reference for the sustainable and high-quality development of the mining and geothermal industries in China.
Keywords： deep mineral resources geothermal resources co-mining high-temperature strata geothermal energy exchange and transmission
A Co-Point Mapping-Based Approach to Drivable Area Detection for Self-Driving Cars Article
Ziyi Liu,Siyu Yu,Nanning Zheng
Engineering 2018, Volume 4, Issue 4, Pages 479-490 doi: 10.1016/j.eng.2018.07.010
The randomness and complexity of urban traffic scenes make it a difficult task for self-driving cars to detect drivable areas. Inspired by human driving behaviors, we propose a novel method of drivable area detection for self-driving cars based on fusing pixel information from a monocular camera with spatial information from a light detection and ranging (LIDAR) scanner. Similar to the bijection of collineation, a new concept called co-point mapping, which is a bijection that maps points from the LIDAR scanner to points on the edge of the image segmentation, is introduced in the proposed method. Our method positions candidate drivable areas through self-learning models based on the initial drivable areas that are obtained by fusing obstacle information with superpixels. In addition, a fusion of four features is applied in order to achieve a more robust performance. In particular, a feature called drivable degree (DD) is proposed to characterize the drivable degree of the LIDAR points. After the initial drivable area is characterized by the features obtained through self-learning, a Bayesian framework is utilized to calculate the final probability map of the drivable area. Our approach introduces no common hypothesis and requires no training steps; yet it yields a state-of-art performance when tested on the ROAD-KITTI benchmark. Experimental results demonstrate that the proposed method is a general and efficient approach for detecting drivable area.
Keywords： Drivable area Self-driving Data fusion Co-point mapping
Yuan liang
Strategic Study of CAE 2009, Volume 11, Issue 5, Pages 72-80
This thesis, based on innovations and practices of methane drainage in multiseams of low permeability and complicated geology in Huainan mining district, systematically describes theories and key technologies of integrated pillarless coal production and methane extraction with "Y" type ventilation system in multiseams of low permeability. Through analyses of deformation, fracturing and failure of rocks around goaf, methane movement and accumulation in and around the goaf are revealed, technologies to retain goaf edge roadways with innovative fill technologies are developed, and technological innovations in methane extraction are made with the retained goaf edge roadways and "Y" type ventilation systems.
Keywords： coal seams of low-permeability integrated pillarless retained roadway methane coal production and methane extraction
FAST: The Five-Hundred-Meter Aperture Spherical Radio Telescope
Peng Jiang, Hengqian Gan, Rui Yao, Jinghai Sun, Jiguang Lu, Dongjun Yu, Hui Li, Jinglong Yu, Bin Dong, Xiaoming Chai, Jianing Yin
Engineering 2023, Volume 28, Issue 9, Pages 21-25 doi: 10.1016/j.eng.2023.04.001
Title Author Date Type Operation
Planar dual-polarized millimeter-wave shared-aperture array antenna with high band isolation
Yuyan CAO, Zijun GUO, Zhangcheng HAO
Journal Article
Design of the Optical System with Large Relative Aperture and Large Linear Field of View
Pan Junye
Journal Article
Application of the Chemical-Looping Concept for Azoetrope Separation
Xin Gao, Xueli Geng
Journal Article
Bioprinting of Small-Diameter Blood Vessels
Xia Cao, Sushila Maharjan, Ramla Ashfaq, Jane Shin, Yu Shrike Zhang
Journal Article
Development Strategy for Integrated Rice Field Aquaculture
Ma Dawen,Qian Jing,Liu Jiashou and Gui Jianfang
Journal Article
High-Quality Development of China Railway Express Based on Win–Win Co-construction
Chen Yun, Lu Chunfang, Sheng Liming, Liu Yanhong
Journal Article
Influence of motor cable on common-mode currents in an inverter-fed motor drive system
Peng-kang XIE, Jia-zheng LU, Guo-zhu CHEN, Heng-lin CHEN
Journal Article
Study on Co-Pyrolysis Characteristics of Biomass Components and Polyethylene by TG-MS
Fan Honggang,Gu Jing,Wang Yazhuo,Yuan Haoran,He Mingyang, Sun Fuan
Journal Article
Disease Risk Comorbidity Index for Patients Receiving Haploidentical Allogeneic Hematopoietic Transplantation
Xiao-Dong Mo, Xiao-Hui Zhang, Lan-Ping Xu, Yu Wang, Chen-Hua Yan, Huan Chen, Yu-Hong Chen, Wei Han, Feng-Rong Wang, Jing-Zhi Wang, Kai-Yan Liu, Xiao-Jun Huang
Journal Article
Preparation of polyvinylpyrrolidone / poly(ethylene-co-vinyl alcohol) blend membranes and the oil/water separation performance
Bai Yunxiang,Wu Guoliang,Zhang Chunfang,Gu Jin,Sun Yuping
Journal Article
Development Strategy for Co-mining of the Deep Mineral and Geothermal Resources
Cai Meifeng, Duo Ji, Chen Xiangsheng, Mao Jingwen, Tang Chun´an, Liu Zhiqiang, Ji Hongguang, Ren Fenhua, Guo Qifeng, Li Peng
Journal Article
A Co-Point Mapping-Based Approach to Drivable Area Detection for Self-Driving Cars
Ziyi Liu,Siyu Yu,Nanning Zheng
Journal Article
Theory and practice of integrated pillarless coal production and methane extraction in multiseams of low permeability
Yuan liang
Journal Article
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