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The Technical Scheme and Key Equipment for Solving the Difficult Technical Problems of Underground RadioCommunications

Situ Mengtian

Strategic Study of CAE 2001, Volume 3, Issue 7,   Pages 64-69

Abstract:

Two difficult tedhnical problems in underground radio communications, i.e. weak signal reception and

Keywords： underground radio communications     weak signal reception     counter lightning interference    

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Geological Disposal of High Level Radio Active Waste：Progress and Challenges

Wang Ju

Strategic Study of CAE 2008, Volume 10, Issue 3,   Pages 58-65

Abstract:

Safe disposal of high level radioactive waste is a challenging task facing the scientific and technological world. This paper introduces the latest progress of high level radioactive waste disposal programs in the world,and discusses the key scientific challenges: the precise prediction of the evolution of a repository site; the characteristics of deep geological environment;the behaviour of deep rock mass,groundwater and engineering material under coupled conditions(intermediate to high temperature, geostress, hydraulic, chemical, biological and radiation process, etc); the geochemical behaviour of transuranic radionuclides with low concentration and its movement with groundwater;and the safety assessment of disposal system. Several large-scale research projects and several hot topics relating to high-level waste disposal are also introduced.

Keywords： high level radioactive waste     geological disposal     underground research laboratory     key scientific challenges    

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Polarizationmultiplexing based duplex radio-over-fiber link for millimeterwave signal transmission toa ring of multiple radio access units None

Tayyab MEHMOOD, Hina QAYYUM, Salman GHAFOOR

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 2,   Pages 300-306 doi: 10.1631/FITEE.1700056

Abstract:

A radio-over-fiber (RoF) distributed antenna system (DAS) architecture is proposed, where millimeterwave (mm-wave) signals are transmitted to four different radio access units (RAUs) arranged in a ringThe radio frequency (RF) signals are transmitted by polarization multiplexing a multi-wavelength source

Keywords： Radio over fiber     Millimeter wave     Radio access units    

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Distinct mononuclear diploid cardiac subpopulation with minimal cell–cell communications persists in

Frontiers of Medicine   Pages 939-956 doi: 10.1007/s11684-023-0987-9

Abstract: paths were identified: two switching to cardiomyocytes (CM) maturation with close CM–fibroblast (FB) communicationsand one maintaining MNDCM status with least CM–FB communications.having interactions with macrophages and non-proliferative MNDCMs (non-pMNDCMs) with minimal cell–cell communicationsIn conclusion, a novel non-pMNDCM subpopulation with minimal cell–cell communications was unveiled, highlighting

Keywords： mononuclear diploid cardiomyocytes     cell–cell communication     cardiac fibroblast     single-cell RNA sequencing     cardiac regeneration    

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From Terahertz Imaging to Terahertz Wireless Communications Review

Yi Huang,Yaochun Shen,Jiayou Wang

Engineering 2023, Volume 22, Issue 3,   Pages 106-124 doi: 10.1016/j.eng.2022.06.023

Abstract: With the roll-out of 5G mobile networks, research into 6G wireless communications is heating up.It is envisioned that THz technology will be used for 6G and future wireless communications.In this paper, we review how THz technology has been employed for imaging and wireless communicationsThe possibility of integrating THz imaging/sensing and wireless communications is considered, and challengesIt is shown that THz technology is indeed a key enabling technology for both imaging and wireless communications

Keywords： Communications     Imaging     Terahertz technology     Wireless communications    

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FM Radio Based Non-cooperative Bistatic Radar Experimental System

Wang Yan

Strategic Study of CAE 2007, Volume 9, Issue 11,   Pages 39-42

Abstract:

An experimental FM radio based non-cooperative bistatic radar is briefly

Keywords： FM radio     non-cooperative bistatic radar     LOS signal     equalization     DBF    

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Kinematic calibration of precise 6-DOF stewart platform-type positioning systems for radio telescope

Juan Carlos JáUREGUI, Eusebio E. HERNáNDEZ, Marco CECCARELLI, Carlos LóPEZ-CAJúN, Alejandro GARCíA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 3,   Pages 252-260 doi: 10.1007/s11465-013-0249-7

Abstract:

The pose accuracy of a parallel robot is a function of the mobile platform posture. Thus, there is no a single value of the robot’s accuracy. In this paper, two novel methods for estimating the accuracy of parallel robots are presented. In the first method, the pose accuracy estimation is calculated by considering the propagation of each error, i.e., error variations are considered as a function of the actuator’s stroke. In the second method, it is considered that each actuator has a constant error at any stroke. Both methods can predict pose accuracy of precise robots at design stages, and/or can reduce calibration time of existing robots. An example of a six degree-of-freedom parallel manipulator is included to show the application of the proposed methods.

Keywords： pose errors     error estimation     parallel robot     radio telescopes    

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A numerical framework for underground structures in layered ground under inclined P-SV waves using stiffness

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 10-24 doi: 10.1007/s11709-022-0904-3

Abstract: A numerical framework was proposed for the seismic analysis of underground structures in layered groundNumerical results show that SV-waves are more destructive to underground structures than P-waves, andthe responses of underground structures are significantly affected by the incident angles.

Keywords： underground structures     seismic response     stiffness matrix method     domain reduction method     P-SV waves    

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A collaborative approach for urban underground space development toward sustainable development goals

Fang-Le PENG, Yong-Kang QIAO, Soheil SABRI, Behnam ATAZADEH, Abbas RAJABIFARD

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 20-45 doi: 10.1007/s11709-021-0716-x

Abstract: The utilization of urban underground space (UUS) offers an effective solution to urban problems but maybetter concerted guidelines to coordinate various urban systems and the multiple components of the undergroundwhich should be viewed as important yardsticks for UUS development, do not explicitly mention urban underground

Keywords： urban underground space     Sustainable Development Goals     spatial data infrastructure     underground land administration    

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Modeling of heat and mass transfer for timber during radio-frequency and convective drying

Jia Xiaoran,Zhao Jingyao and Cai Yingchun

Strategic Study of CAE 2014, Volume 16, Issue 4,   Pages 106-112

Abstract: medium heat and mass transfer，combined with the mechanism and characteristics of heat mass transfer in radio-frequency

Keywords： timber     radio- frequency- convective drying     mathematical model     difference equation    

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Prediction of characteristic blast-induced vibration frequency during underground excavation by using

Tae Un PAK; Guk Rae JO; Un Chol HAN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 8,   Pages 1029-1039 doi: 10.1007/s11709-022-0861-x

Abstract: In this study, blasting vibration signals were measured during underground excavation in carbonaceous

Keywords： wavelet analysis     blast-induced vibration     frequency characteristics     underground excavation    

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Rhizosphere immunity: targeting the underground for sustainable plant health management

Zhong WEI, Ville-Petri FRIMAN, Thomas POMMIER, Stefan GEISEN, Alexandre JOUSSET, Qirong SHEN

Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 3,   Pages 317-328 doi: 10.15302/J-FASE-2020346

Abstract:

Managing plant health is a great challenge for modern food production and is further complicated by the lack of common ground between the many disciplines involved in disease control. Here we present the concept of rhizosphere immunity, in which plant health is considered as an ecosystem level property emerging from networks of interactions between plants, microbiota and the surrounding soil matrix. These interactions can potentially extend the innate plant immune system to a point where the rhizosphere immunity can fulfil all four core functions of a full immune system: pathogen prevention, recognition, response and homeostasis. We suggest that considering plant health from a meta-organism perspective will help in developing multidisciplinary pathogen management strategies that focus on steering the whole plant-microbe-soil networks instead of individual components. This might be achieved by bringing together the latest discoveries in phytopathology, microbiome research, soil science and agronomy to pave the way toward more sustainable and productive agriculture.

Keywords： rhizosphere     soil microbiome     plant immunity     microbial ecology     plant health     soilborne pathogens    

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Development and utilization of underground space for the protection of relics in the Yang Emperor Mausoleum

CHEN Zhilong, ZHANG Ping, LI Juxi

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2,   Pages 229-233 doi: 10.1007/s11709-007-0028-9

Abstract: that have been unearthed at the Yang Emperor Mausoleum of the Han Dynasty, and China s first wholly undergroundrelics that is under construction, the article expounds the importance of relic site protection through underground

Keywords： importance     architecture     preservation     harmonious relationship     construction    

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Study on Several Radio Propagation Models in ITU - R Recommendations

Zhang Minggao

Strategic Study of CAE 2000, Volume 2, Issue 7,   Pages 74-78

Abstract:

Studies are presented on five radio propagation models in ITU - R recommendations.

Keywords： radio propagation     tropospheric scatter     sea reflection     ionospheric scintillation     attenuation by atmospheric    

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Analysis and research for risk assessment criteria of underground engineering

Yao Xuande,Wang Mengshu

Strategic Study of CAE 2009, Volume 11, Issue 7,   Pages 86-91

Abstract:

In this paper, the characteristics of underground works and constructiveguidelines for risk assessment of underground works were intro.The results of the research were successfullyapplied to the study of the Beijing Municipal City Planning and Design of the underground road system

Keywords： underground engineering     risk assessment     criteria    

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Title Author Date Type Operation

The Technical Scheme and Key Equipment for Solving the Difficult Technical Problems of Underground RadioCommunications

Situ Mengtian

Journal Article

Geological Disposal of High Level Radio Active Waste：Progress and Challenges

Wang Ju

Journal Article

Polarizationmultiplexing based duplex radio-over-fiber link for millimeterwave signal transmission toa ring of multiple radio access units

Tayyab MEHMOOD, Hina QAYYUM, Salman GHAFOOR

Journal Article

Distinct mononuclear diploid cardiac subpopulation with minimal cell–cell communications persists in

Journal Article

From Terahertz Imaging to Terahertz Wireless Communications

Yi Huang,Yaochun Shen,Jiayou Wang

Journal Article

FM Radio Based Non-cooperative Bistatic Radar Experimental System

Wang Yan

Journal Article

Kinematic calibration of precise 6-DOF stewart platform-type positioning systems for radio telescope

Juan Carlos JáUREGUI, Eusebio E. HERNáNDEZ, Marco CECCARELLI, Carlos LóPEZ-CAJúN, Alejandro GARCíA

Journal Article

A numerical framework for underground structures in layered ground under inclined P-SV waves using stiffness

Journal Article

A collaborative approach for urban underground space development toward sustainable development goals

Fang-Le PENG, Yong-Kang QIAO, Soheil SABRI, Behnam ATAZADEH, Abbas RAJABIFARD

Journal Article

Modeling of heat and mass transfer for timber during radio-frequency and convective drying

Jia Xiaoran,Zhao Jingyao and Cai Yingchun

Journal Article

Prediction of characteristic blast-induced vibration frequency during underground excavation by using

Tae Un PAK; Guk Rae JO; Un Chol HAN

Journal Article

Rhizosphere immunity: targeting the underground for sustainable plant health management

Zhong WEI, Ville-Petri FRIMAN, Thomas POMMIER, Stefan GEISEN, Alexandre JOUSSET, Qirong SHEN

Journal Article

Development and utilization of underground space for the protection of relics in the Yang Emperor Mausoleum

CHEN Zhilong, ZHANG Ping, LI Juxi

Journal Article

Study on Several Radio Propagation Models in ITU - R Recommendations

Zhang Minggao

Journal Article

Analysis and research for risk assessment criteria of underground engineering

Yao Xuande,Wang Mengshu

Journal Article