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The μ Robust Control Design for Mobile Satellite Antennas

Li Guo,Hu Jianfei,Ji Xianzheng

Strategic Study of CAE 2007, Volume 9, Issue 5, Pages 22-26

Abstract: >This paper investigates the use of the μ robust controller for improving control performance of mobilesatellite antennas.A robust control system of mobile satellite antennas is presented, and the μ robust controlleris designed according to the mobile satellite antennas systems model. It is clarified that the control performance of mobile satellite antennas is improved and the control

Keywords： mobile satellite antennas theμdesign robust control

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The General Conceptual Design Simulation of the Satellite Mobile Network

Jin Shiyao

Strategic Study of CAE 2004, Volume 6, Issue 1, Pages 30-36

Abstract:

The satellite mobile network is a sky-based communication network whose basic physical architectureis satellite constellation, and it covers the global areas with the communication links between theThe satellite mobile network gives great impetuses to social development, scientific and technical advancementThis paper introduces the general concept of the satellite mobile network, and designs a platform thatmobile network with some examples.

Keywords： satellite mobile network general simulation

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Consideration on Developing Mobile Satellite Communication

Zhang Naitong,Zhang Zhongzhao,Chu Haibin,Liu Huijie

Strategic Study of CAE 2002, Volume 4, Issue 10, Pages 11-16

Abstract: The paper discusses the development and trend of the satellite communication system, and then some viewpointson developing mobile satellite communication system are put forward.

Keywords： mobile satellite communication constellation communication system broad band service

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Diversity Glass Antennas for Tri-Band WiFi Applications Article

Peng Fei Hu, Kwok Wa Leung, Kwai Man Luk, Yong Mei Pan, Shao Yong Zheng

Engineering 2023, Volume 23, Issue 4, Pages 157-169 doi: 10.1016/j.eng.2022.09.011

Abstract: 0.0001pt">This paper investigates two novel polarization- and pattern-diversity glass dielectric resonator antennasAll three of the new diversity antennas were fabricated and measured to verify the simulations.In our experiment, the bit error rate (BER) of the three diversity glass antennas and the reference space-diversity

Keywords： WiFi Diversity antennas Multi-frequency Glass Dielectric resonator antennas Multiple-input multiple-output

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Research and practice on system engineering management of a mobile payment project

Yongkai ZHOU, Hongfeng CHAI

Frontiers of Engineering Management 2017, Volume 4, Issue 2, Pages 127-137 doi: 10.15302/J-FEM-2017011

Abstract: The popularization of the mobile internet has given rise to demand for flexible and convenient paymentit is necessary to keep pace with or even lead the trend of innovation and development in the age of mobileperspective of systems engineering, this paper introduces research and implementation of China UnionPay’s mobileThe general requirements and core engineering problems of the mobile payment project are summarized basedThe launch of the mobile payment project also opens the window to coordinating and upgrading the whole

Keywords： systems engineering mobile payment engineering management method Mobile QuickPass national information

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Motion control of multi-actuator hydraulic systems for mobile machineries: Recent advancements and future

Bing XU, Min CHENG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2, Pages 151-166 doi: 10.1007/s11465-018-0470-5

Abstract: upcoming trends in motion control technologies employed in designing multi-actuator hydraulic systems for mobileHydraulic systems have been extensively used in mobile machineries due to their superior power densityThen, the advanced operation methods of multi-actuator mobile machineries are reviewed, including coordinated

Keywords： motion control electrohydraulic control energy efficiency mobile machineries

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Satellite scheduling engine: The intelligent solver for future multi-satellite management

Frontiers of Engineering Management 2022, Volume 9, Issue 4, Pages 683-688 doi: 10.1007/s42524-022-0222-4

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The Polar Orbit Meteorological Satellite in China

Meng Zhizhong

Strategic Study of CAE 2004, Volume 6, Issue 10, Pages 1-5

Abstract:

Meteorological satellite is one kind of applied satellite that has tremendous benefit to both economicThe development of polar orbit meteorological satellite in China has experienced the processes from experimentThis paper introduces briefly the development and performance of the FY-1 polar meteorological satelliteMoreover, the general information of the new generation polar FY-3 meteorological satellite is presentedThe technology specialty of the satellite is summarized.

Keywords： polar orbit meteorological satellite FY-1 satellite FY-3 satellite

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The Thinking Concerning Technique Way of China’s Satellite Engineering

Ye Peijian

Strategic Study of CAE 2001, Volume 3, Issue 9, Pages 16-20

Abstract: In the next 20 years, application satellite and satellite application is still the dominant field inT6 build-up some application satellite systems for long-term stable operation is the main target amongThe application satellite will be the base of such systems.Satellite engineering design has to be done from top level with considering simultaneously the largeSo the satellite products can be obtained with a faster, better and more e-conomic results.

Keywords： space exploitation application satellite satellite application satellite-bus

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Wide-Angle Scanning Antennas for Millimeter-Wave 5G Applications Article

Raj Mittra, Abdelkhalek Nasri, Ravi Kumar Arya

Engineering 2022, Volume 11, Issue 4, Pages 60-73 doi: 10.1016/j.eng.2021.10.017

Abstract: using a reconfigurable metasurface type of panels.Graphical abstractA number of designs for scanning antennas

Keywords： Luneburg lens Scanning arrays Millimeter-wave antennas Switchable phase shifters Reconfigurable metasurfaces

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High resolution satellite imaging sensors for precision agriculture

Chenghai YANG

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 4, Pages 393-405 doi: 10.15302/J-FASE-2018226

Abstract: Recent developments in high resolution satellite sensors have significantly narrowed the gap in spatialresolution between satellite imagery and airborne imagery.Since the first high resolution satellite sensor IKONOS was launched in 1999, numerous commercial highresolution satellite sensors have become available.This article will provide an overview of commercially available high resolution satellite sensors that

Keywords： high resolution satellite sensor multispectral imagery precision agriculture spatial resolution temporal

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A new efficient optimal path planner for mobile robot based on Invasive Weed Optimization algorithm

Prases K. MOHANTY,Dayal R. PARHI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 4, Pages 317-330 doi: 10.1007/s11465-014-0304-z

Abstract:

Planning of the shortest/optimal route is essential for efficient operation of autonomous mobile robotIWO), a new meta-heuristic algorithm, has been implemented for solving the path planning problem of mobile

Keywords： mobile robot obstacle avoidance Invasive Weed Optimization navigation

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Output tracking control of mobile manipulators based on dynamical sliding-mode control

WUYuxiang, FENG Ying, HU Yueming

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1, Pages 110-115 doi: 10.1007/s11465-007-0019-5

Abstract: A dynamical sliding-mode controller is devised to track the output of mobile manipulators.investigation, firstly a reduced dynamic model considering the dynamics of the driving motor is developed for mobilea design method of the dynamical sliding-mode controller that is applied to the output tracking of mobile

Keywords： lower-dimensional nonlinear trajectory tracking diffeomorphism

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Assessment of mobile and potential mobile trace elements extractability in calcareous soils using different

Mohsen Jalali, Ziba Hurseresht

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1186-4

Abstract: DTPA and NH4OAc, HNO3 and EDTA, and MgCl2 and NH4NO3 had similar behavior. In NH4OAc, DTPA, and EDTA, the possibility of re-adsorption of trace elements is low. CaCl2 may be more suitable than other extracts in calcareous soils. Understanding trace elements mobility in soils, extracting agents, and their relationships with soil components, are essential for predicting their movement in soil profile and availability to plants. A laboratory study was conducted to evaluate extractability of cadmium (Cd), cobalt (Co), copper (Cu), nickel (Ni), and zinc (Zn) from calcareous soils utilizing various extracting agents to be specific CaCl2, DTPA, EDTA, HNO3, MgCl2, NaNO3, NH4NO3, and NH4OAc. Cluster analysis indicated that DTPA and NH4OAc, HNO3 and EDTA, and MgCl2 and NH4NO3 extracting agents yielded comparative values, whereas NaNO3 and CaCl2 have shown different behavior than other extracting agents for all studied trace elements. The speciation of extracted trace elements in solutions indicated that in the CaCl2, NaNO3, NH4NO3, and MgCl2 extracting agents most extracted Cd, Co, Ni, Zn, and part of Cu were as free ions and may be re-adsorbed on soils, leading to lower extractability, whereas, in the case of HNO3 extracting agent, the likelihood of re-adsorption of trace elements may be little. The results of speciation of trace elements using NH4OAc, DTPA, and EDTA extracting agents showed that Me-(Acetate)3–, Me-(Acetate)2(aq), Me(DTPA)3−, Me(EDTA)2−, and MeH(EDTA)– complexes dominated in solutions indicating that the extracted trace elements may not be re-adsorbed on soils, leading to higher extractability. The results of this study are useful for short and long-term evaluations of trace elements mobility and further environmental impacts.

Keywords： Mobility Calcareous soils Extracting agents Trace elements