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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
A high-isolation coupled-fed building block for metal-rimmed 5G smartphones Correspondence
Aidi REN, Chengwei YU, Lixia YANG, Wei CUI, Zhixiang HUANG, Ying LIU
Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 11, Pages 1657-1664 doi: 10.1631/FITEE.2300203
The Consolidation of Highly Saturated Soils and Saturation Degree's Influence
Jin Zhigao
Strategic Study of CAE 2004, Volume 6, Issue 9, Pages 73-76
Based on Terzaghi's consolidation theories and Biot's consolidation theories, the consolidating mechanism and consolidating process of highly saturated soil are discussed according to the variety of saturation degree. The influence of saturation degree changing on porous fluid compressibility as well as the whole consolidation process are studied deeply in this paper.
Keywords： consolidation saturated degree elasticity modulus compressing
The effective large-scale system of mega project
Ren Hong,Zeng Deheng,Zhang Wei,Zhang Jiangao
Strategic Study of CAE 2012, Volume 14, Issue 12, Pages 75-80
Mega project belongs to complex systems category and its overly complex system structure results in more management difficult. In order to improve management efficiency and complete project target, it is proposed to use new concept to identify and streamline size, scope and elements of mega project system, which is called effective large-scale system. Firstly, the concept of large-scale system and its effectiveness sources are defined. And then, the elements’ contribution degree and correlation degree criteria are presented. The contribution and correlation degree are based on fuzzy relationship matrix. Finally, coordination problems between the elements are solved by domination cooperative game model.
Keywords： mega project effective large-scale system contribution degree correlation degree cooperative game
Sexual satisfaction and its influencing factors of postmenopausal women in rural areas
Jing Xiu,Yang Jigao,Liu Jun and Zhang Lihua
Strategic Study of CAE 2014, Volume 16, Issue 5, Pages 105-109
To explore the factors affecting women’s sexual satisfaction after menopause in rural areas，thus to provide scientific evidence for elder women’s health，the authors used a multi-stage random sampling method on postmenopausal women in rural areas from five areas of Chongqing from March to August 2012. We adopted a unified approach questionnaire and physical examination. The results showed that the proportion of rural postmenopausal women’s sexual satisfaction and dissatisfaction accounted for 83.7 % and 16.3 %，respectively. The univariate analysis showed that postmenopausal women’s sexual satisfaction was correlated with 12 variables (P<0.05) including their marital status，education level，household income，family structure，whether suffering from gynecological diseases，genital tract discomfort last two weeks，living way，the need for sex，frequency of sexual life，sexual health knowledge of gerontism，perceived physical condition and conscious living conditions. The multivariate logistic regression analysis showed that the separation methods (odds ratio (OR) =1.711，95 % confidence interval (CI) is 1.334～2.194)，a high frequency of sexual life (OR=1.694，95 % CI is 1.334～2.152)，poor performance status conscious (OR=1.281，95 % CI is 1.018～1.613) were risk factors，while the high household income (OR=0.651，95 % CI is 0.512～0.826) and a history of gynecological diseases (OR=0.689，95 % CI is 0.486～0.977) were protective factors.Therefore，there were varieties of relevant factors affecting rural postmenopausal women’s sexual satisfaction. Postmenopausal women should be paid attention to sex education so as to improve their life quality.
Keywords： postmenopausal women sexual satisfaction influencing factor Logistic analysis
Fuzzy Control on Vehicle Motion Based on Subjective-objectiveJudgment of Driving Tenseness
Chen Xuemei and Gao Li
Strategic Study of CAE 2007, Volume 9, Issue 1, Pages 53-57
It is very important whether a driver can give correct decision and precise operation in emergency． So，it is necessary to judge the emergency degree of environment and provide control algorithm of vehicle motion for ensuring the lives and properties’safety．The emergency degree is firstly given based on relative distance， velocity and drivers’characteristics．Then the control algorithm of vehicle motion based on fuzzy logic is established and is simulated with Simulink．The results show that the higher the emergency degree，the bigger the maximum deceleration is used to control the vehicle．The results also show that the drivers’characteristics have obvious effect on the braking operation．The fuzzy logic is valid to control vehicle’s deceleration．
Ying Zhang, Ou Han, Angui Li, Li´an Hou, Thomas Olofsson, Linhua Zhang, Wenjun Lei,
Engineering 2022, Volume 8, Issue 1, Pages 130-137 doi: 10.1016/j.eng.2020.10.020
The transmission of coronavirus disease 2019 (COVID-19) has presented challenges for the control of the indoor environment of isolation wards. Scientific air distribution design and operation management are crucial to ensure the environmental safety of medical staff. This paper proposes the application of adaptive wall-based attachment ventilation and evaluates this air supply mode based on contaminants dispersion, removal efficiency, thermal comfort, and operating expense. Adaptive wall-based attachment ventilation provides a direct supply of fresh air to the occupied zone. In comparison with a ceiling air supply or upper sidewall air supply, adaptive wall-based attachment ventilation results in a 15%–47% lower average concentration of contaminants, for a continual release of contaminants at the same air changes per hour (ACH; 10 h–1). The contaminant removal efficiency of complete mixing ventilation cannot exceed 1.0. For adaptive wall-based attachment ventilation, the contaminant removal efficiency is an exponential function of the ACH. Compared with the ceiling air supply mode or upper sidewall air supply mode, adaptive wall-based attachment ventilation achieves a similar thermal comfort level (predicted mean vote (PMV) of –0.1–0.4; draught rate of 2.5%–6.7%) and a similar performance in removing contaminants, but has a lower ACH and uses less energy.
Keywords： Ventilation efficiency Air change rate COVID-19 Attachment ventilation Air distribution Isolation ward
Material Mechanical Properties Necessary for the Structural Intervention of Concrete Structures Article
Tamon Ueda
Engineering 2019, Volume 5, Issue 6, Pages 1131-1138 doi: 10.1016/j.eng.2019.02.012
Structural intervention involves the restoration and/or upgrading of the mechanical performances of structures. In addition to concrete and steel, which are typical materials for concrete structures, various fiber-reinforced polymers (FRP), cementitious materials with fibers, polymers, and adhesives are often applied for structural intervention. In order to predict structural performance, it is necessary to develop a generic method that is applicable to not only to steel, but also to other materials. Such a generic model could provide information on the mechanical properties required to improve the structural performance. External bonding, which is a typical scheme for structural intervention, is not applied for new structures. It is necessary to clarify material properties and structural details in order to achieve better bonding strength at the interface between the substrate concrete and an externally bonded material. This paper presents the mechanical properties of substrate concrete and relevant intervention material for the following purposes: ① to achieve better shear strength and ultimate deformation of a member after structural intervention; and ② to achieve better debonding strength for external bonding. This paper concludes that some of the mechanical properties and structural details for intervention materials that are necessary for improvement in mechanical performance in structures with structural intervention are new, and differ from those of structures without intervention. For example, high strength and stiffness are important properties for materials in structures without structural intervention, whereas high fracturing strain and low stiffness are important properties for structural intervention materials.
Keywords： Structural intervention High fracturing strain No yielding Low stiffness Roughness fiber-reinforced polymers Polymers
High Sensitive Electron-Bombarded CCD for Low Light Level Imaging
Zhou Liwei,Liu Guangrong,Gao Zhiyun,Wang Zhongchun
Strategic Study of CAE 1999, Volume 1, Issue 3, Pages 56-62
The present paper reviews the recent developments of electron-bombarded charge coupled devices (EBCCD) for low-light-level imaging. The EBCCD eliminates the complicated image transfer chain associated with conventional image intensifier fibrecoupled CCD (ICCD) by integrating a thinned back-illuminated CCD directly into the vacuum of the image tube in replacement of the phosphor screen. The photoelectrons emitted from the photocathode are “proximity focusing” or “sharp focusing” directly onto the electron sensitive CCD, and the video-signal occurs. It has been shown that the EBCCD image tubes offer nearly noiseless gain, high signal to noise ratio and excellent MTF and, for this reason, are superior to conventional ICCD approaches under all light level conditions. This paper will give a detailed description on the thinned back-illuminated CCD imager design and fabrication, such as CCD chip thinning and thinned CCD backside treatment, as well as the technical parameters of different kinds of inverter type EBCCD. The performance of the proximity type EBCCD, the inverter type EBCCD and ICCD will also be compared and analyzed. Finaly, the present paper shows that these new, high performance devices of EBCCD are in an advantageous position for many applications in low-light-lev-el surveillance imaging, high energy physics and medical diagnostics.
Keywords： low-light-level imaging charge-coupled-devices electron-bombarded
J. Patel, F. McGain, T. Bhatelia, S. Wang, B. Sun, J. Monty, V. Pareek
Engineering 2022, Volume 15, Issue 8, Pages 126-132 doi: 10.1016/j.eng.2020.12.024
By providing a means of separating the airborne emissions of patients from the air breathed by healthcare workers (HCWs), vented individual patient (VIP) hoods, a form of local exhaust ventilation (LEV), offer a new approach to reduce hospital-acquired infection (HAI). Results from recent studies have demonstrated that, for typical patient-emitted aerosols, VIP hoods provide protection at least equivalent to that of an N95 mask. Unlike a mask, hood performance can be easily monitored and HCWs can be alerted to failure by alarms. The appropriate use of these relatively simple devices could both reduce the reliance on personal protective equipment (PPE) for infection control and provide a low-cost and energy-efficient form of protection for hospitals and clinics. Although the development and deployment of VIP hoods has been accelerated by the coronavirus disease 2019 (COVID-19) pandemic, these devices are currently an immature technology. In this review, we describe the state of the art of VIP hoods and identify aspects in need of further development, both in terms of device design and the protocols associated with their use. The broader concept of individual patient hoods has the potential to be expanded beyond ventilation to the provision of clean conditions for individual patients and personalized control over other environmental factors such as temperature and humidity.
Keywords： COVID-19 Vented individual patient hood Airborne transmission Healthcare worker Infectious disease
Self-deployed execution environment for high performance computing Research Articles
Mingtian SHAO, Kai LU, Wenzhe ZHANG
Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 6, Pages 845-857 doi: 10.1631/FITEE.2100016
Traditional (HPC) systems provide a standard preset environment to support scientific computation. However, HPC development needs to provide support for more and more diverse applications, such as artificial intelligence and big data. The standard preset environment can no longer meet these diverse requirements. If users still run these emerging applications on HPC systems, they need to manually maintain the specific dependencies (libraries, environment variables, and so on) of their applications. This increases the development and deployment burden for users. Moreover, the multi-user mode brings about privacy problems among users. Containers like Docker and Singularity can encapsulate the job's , but in a highly customized HPC system, cross-environment application deployment of Docker and Singularity is limited. The introduction of container images also imposes a maintenance burden on system administrators. Facing the above-mentioned problems, in this paper we propose a self-deployed (SDEE) for HPC. SDEE combines the advantages of traditional virtualization and modern containers. SDEE provides an isolated and customizable environment (similar to a virtual machine) to the user. The user is the root user in this environment. The user develops and debugs the application and deploys its special dependencies in this environment. Then the user can load the job to compute nodes directly through the traditional HPC job management system. The job and its dependencies are analyzed, packaged, deployed, and executed automatically. This process enables transparent and rapid job deployment, which not only reduces the burden on users, but also protects user privacy. Experiments show that the overhead introduced by SDEE is negligible and lower than those of both Docker and Singularity.
Keywords： Execution environment High performance computing Light-weight Isolation Overlay
Zhi-feng ZHANG, Yan-hu CHEN, De-jun LI, Bo JIN, Can-jun YANG, Jun WANG
Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 11, Pages 1328-1339 doi: 10.1631/FITEE.1601843
Cabled seafloor observatories play an important role in ocean exploration for its long-term, real-time, and in-situ observation characteristics. In establishing a permanent, reliable, and robust seafloor observatory, a highly reliable cable switching and fault isolation method is essential. After reviewing the advantages and disadvantages of existing switching methods, we propose a novel active switching method for network configuration. Without additional communication path requirements, the switching method provides a way to communicate with a shore station through an existing power transmission path. A coded voltage signal with a distinct sequence is employed as the communication medium to transmit commands. The analysis of the maximum bit frequency of the voltage signals guarantees the accuracy of command recognition. A prototype based on the switching method is built and tested in a laboratory environment, which validated the functionality and reliability of the method.
Keywords： Cabled seafloor observatories Cable switching and fault isolation Coded voltage signal Maximum bit frequency
High linearity U-band power amplifier design: a novel intermodulation point analysis method Research Article
Jie CUI, Peipei LI, Weixing SHENG,cuijie@njust.edu.cn
Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 1, Pages 176-186 doi: 10.1631/FITEE.2200082
Keywords： CMOS silicon-on-insulator (SOI) Linearity analysis Milimeter wave (mm-Wave) Power amplifier
Xianliang Wang, Jiao Wang, Jin Shen, John S. Ji, Lijun Pan, Hang Liu, Kangfeng Zhao, Li Li, Bo Ying, Lin Fan, Liubo Zhang, Lin Wang, Xiaoming Shi
Engineering 2021, Volume 7, Issue 7, Pages 908-913 doi: 10.1016/j.eng.2021.03.010
The coronavirus disease 2019 (COVID-19) pandemic increased the burden on many healthcare systems and in the process, exposed the need for medical resources and physical space. While few studies discussed the efficient utilization of medical resources and physical space so far. Therefore, this study aimed to summarize experiences related to facilities used for centralized isolation for medical observation and
treatment during the COVID-19 pandemic in China and to provide suggestions to further improve the management of confirmed cases, suspected cases, and close contacts. In China, three types of facilities for centralized isolation (Fangcang shelter hospitals, refitted non-designated hospitals, and quarantine hotels) underwent retrofitting for the treatment and isolation of confirmed and suspected cases. These
facilities mitigated the immediate high demand for space. Moreover, in order to minimize infection risks in these facilities, regulators and governmental agencies implemented new designs, management measures, and precautionary measures to minimize infection risk. Other countries and regions could refer to China’s experience in optimally allocating social resources in response to the COVID-19 pandemic.
As a conclusion, government should allocate social resources and construct centralized isolation and quarantine facilities for an emergency response, health authorities should issue regulations for centralized isolation facilities and pay strict attention to the daily management of these facilities, a multidisciplinary administration team is required to support the daily operation of a centralized isolation facility, in-depth studies and international collaboration on the centralized isolation policy are encouraged.
Keywords： Centralized isolation Risk control Infectious patients Close contacts Coronavirus disease
Chao Peipei, Hu Qingao, Wan Xinming, Zhong Zhihua
Strategic Study of CAE 2016, Volume 18, Issue 4, Pages 61-68 doi: 10.15302/J-SSCAE-2016.04.010
To better support our new energy vehicles industry further decision, and promote the development of the industry rapidly and healthily, our research group fully research the development situation of domestic new energy vehicle industry, summarize the achievements of China's "12th Five-Year", systemly analysis the impact and effectiveness of the demonstration project and technology innovation project,and further evaluate the maturity level of technology,manufacturing and market.Finally make a pre-judgment of the base on the latest developments and rules.
Keywords： new energy vehicles industry sumarry typical cases Situation prediction suggestion
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
A high-isolation coupled-fed building block for metal-rimmed 5G smartphones
Aidi REN, Chengwei YU, Lixia YANG, Wei CUI, Zhixiang HUANG, Ying LIU
Journal Article
The Consolidation of Highly Saturated Soils and Saturation Degree's Influence
Jin Zhigao
Journal Article
The effective large-scale system of mega project
Ren Hong,Zeng Deheng,Zhang Wei,Zhang Jiangao
Journal Article
Sexual satisfaction and its influencing factors of postmenopausal women in rural areas
Jing Xiu,Yang Jigao,Liu Jun and Zhang Lihua
Journal Article
Fuzzy Control on Vehicle Motion Based on Subjective-objectiveJudgment of Driving Tenseness
Chen Xuemei and Gao Li
Journal Article
Adaptive Wall-Based Attachment Ventilation: A Comparative Study on Its Effectiveness in Airborne Infection Isolation Rooms with Negative Pressure
Ying Zhang, Ou Han, Angui Li, Li´an Hou, Thomas Olofsson, Linhua Zhang, Wenjun Lei,
Journal Article
Material Mechanical Properties Necessary for the Structural Intervention of Concrete Structures
Tamon Ueda
Journal Article
High Sensitive Electron-Bombarded CCD for Low Light Level Imaging
Zhou Liwei,Liu Guangrong,Gao Zhiyun,Wang Zhongchun
Journal Article
Vented Individual Patient (VIP) Hoods for the Control of Infectious Airborne Diseases in Healthcare Facilities
J. Patel, F. McGain, T. Bhatelia, S. Wang, B. Sun, J. Monty, V. Pareek
Journal Article
Self-deployed execution environment for high performance computing
Mingtian SHAO, Kai LU, Wenzhe ZHANG
Journal Article
Use of a coded voltage signal for cable switching and fault isolation in cabled seafloor observatories
Zhi-feng ZHANG, Yan-hu CHEN, De-jun LI, Bo JIN, Can-jun YANG, Jun WANG
Journal Article
High linearity U-band power amplifier design: a novel intermodulation point analysis method
Jie CUI, Peipei LI, Weixing SHENG,cuijie@njust.edu.cn
Journal Article
Facilities for Centralized Isolation and Quarantine for the Observation and Treatment of Patients with COVID-19
Xianliang Wang, Jiao Wang, Jin Shen, John S. Ji, Lijun Pan, Hang Liu, Kangfeng Zhao, Li Li, Bo Ying, Lin Fan, Liubo Zhang, Lin Wang, Xiaoming Shi
Journal Article
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