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Artykuły w czasopismach na temat „Structural control technology”

Autor: Grafiati

Data publikacji: 6 września 2023

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1

Soong, T. T., A. M. Reinhorn, S. Aizawa i M. Higashino. "Recent structural applications of active control technology". Journal of Structural Control 1, nr 1-2 (grudzień 1994): 1–21. http://dx.doi.org/10.1002/stc.4300010101.

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Forrai, A., H. Funato, K. Kamiyama i S. Hashimoto. "Structural control technology: system identification and control of flexible structures". Computing & Control Engineering Journal 12, nr 6 (1.12.2001): 257–62. http://dx.doi.org/10.1049/cce:20010602.

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Hirsch, S. M., V. Jayachandran i J. Q. Sun. "Structural-acoustic control for quieter aircraft interior-Smart Trim Technology". Composite Structures 42, nr 2 (czerwiec 1998): 189–202. http://dx.doi.org/10.1016/s0263-8223(98)00074-9.

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FUJITA, Satoshi. "Structural Control Technology for Realization of Safety and Reliable Society". Journal of the Society of Mechanical Engineers 114, nr 1106 (2011): 40–44. http://dx.doi.org/10.1299/jsmemag.114.1106_40.

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Marchamalo, M., D. Galán, J. A. Sánchez i R. Martínez. "La tecnología DGPS en la construcción: control de movimientos en grandes estructuras". Informes de la Construcción 63, nr 522 (1.06.2011): 93–102. http://dx.doi.org/10.3989/ic.10.008.

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Akkaram, Srikanth, Jean-Daniel Beley, Bob Maffeo i Gene Wiggs. "Analytical derivatives technology for structural shape design". Structural and Multidisciplinary Optimization 34, nr 2 (12.12.2006): 165–78. http://dx.doi.org/10.1007/s00158-006-0069-z.

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Zhu, Yong Jian. "Research on Control Technology and Structural Characteristics of Very Instable Surrounding Rocks in Structural Belt". Advanced Materials Research 261-263 (maj 2011): 1743–48. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.1743.

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According to the actual state of the 1150 horizontal main haulageway of Tailai colliery is in the affected areas of many faults, both on the roof to floor and two sides convergences are about 1000mm,the YTJ20 strata structure detector was used to detect the strata structure character of the roadway roof, it showed the surrounding rock of 1150 horizontal main haulageway is very broken and the maximum failure depth reached to 6m; meanwhile we took 4 group of rock samples from the broken zone to carry out x diffraction, the results showed that the surrounding rock in the broken contained high expansibility rock, so measure of rock surrounding grouting reinforcement was proposed without changing the original supporting parameters. Comparative analysis of rock surrounding reinforcement effect before and after grouting was calculated by FLAC simulation soft. The result shows only supported “bolts + shotcrete layer + cables”, both the deformation speed and deformation amount are very obviously, the community of “rock-support” shows loose and breaking state; But using the combined supporting method of grouting reinforcement and “bolts + shotcrete layer + cables”, the surrounding rock deformation obtained effectively control with less stress release, the community of “rock-support” shows higher integrity degree, It can ensure the safe use of the roadway.

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Yang, J., S. S. Sun, S. W. Zhang i W. H. Li. "Review of Structural Control Technologies Using Magnetorheological Elastomers". Current Smart Materials 4, nr 1 (2.07.2019): 22–28. http://dx.doi.org/10.2174/2405465804666190326152207.

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It is critically important to protect civil structures from unpredictable events, including earthquakes and strong winds, as well as maintaining their structural integrity and serviceability. To this end, considerable attention has been paid on the research and development of aseismic technology. This paper provides a literature review on the recent progress of Magnetorheological Elastomer (MRE) and the development and application of MRE devices on structure control technology. Firstly, this paper reviewed the investigations into the MR effect, mechanical property of MRE and its ingredients during the past decades. Then, research interests arising in the implementation and development of smart devices using MREs on structure control will be systematically reviewed. Basically, MRE base isolation and MRE based tuned mass damper are two major technologies to attenuate structural vibration, which will be the main focus of this paper.

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9

Naito, Makio, Hiroya Abe i Kazuyoshi Sato. "Nanoparticle Bonding Technology for the Structural Control of Particles and Materials". Journal of the Society of Powder Technology, Japan 42, nr 9 (2005): 625–31. http://dx.doi.org/10.4164/sptj.42.625.

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Zhou, Lijun, i Qinghong Zhao. "Research on Structural Seismic and Vibration Control Technology of Modern Buildings". IOP Conference Series: Earth and Environmental Science 526 (8.07.2020): 012181. http://dx.doi.org/10.1088/1755-1315/526/1/012181.

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MATSUSHITA, Hiroshi. "Active Controls of Aircraft Structural Modes(Semsing and Active Control Technology in Recent Dynamic Problems)". Journal of the Society of Mechanical Engineers 89, nr 811 (1986): 662–67. http://dx.doi.org/10.1299/jsmemag.89.811_662.

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Liu, S. C., H. J. Lagorio i K. P. Chong. "Status of U.S. Research on Structural Control Systems". Earthquake Spectra 7, nr 4 (listopad 1991): 543–50. http://dx.doi.org/10.1193/1.1585642.

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This paper assesses the current status of control technology and its potential application to structural safety against seismic, wind and other dynamics loads. An intensive effort underway to develop a national research program is described. Research needs and important problems remaining from both the technological and practical standpoints are suggested.

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13

Jin, Hui-Wu, Guo-An Wang i Zhan-Ming Chen. "Temperature Control Technology for Construction of Jinsha River Bridge". Advances in Civil Engineering 2021 (3.11.2021): 1–14. http://dx.doi.org/10.1155/2021/3452167.

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The key problem of mass concrete temperature control is to effectively control the maximum temperature inside concrete, the temperature difference between inside and outside concrete, and the temperature difference between surface and environment. The size of the main tower cap of No. 3 Jinsha River Bridge is 37 m × 23.5 m × 5.5 m, and the cubic volume of concrete reaches 4782.3 m3, which is poured in two times. In order to ensure construction quality of mass concrete structure, prevent the large mass concrete temperature stress, through the numerical simulation of the temperature control and optimization scheme, by optimizing the mixture ratio design, reducing the temperature of concrete pouring into the mold, cooling water cycling, insulation keeping in good health and a series of measures to effectively achieve the control goal, and eliminating the temperature cracks. The measured data show that the maximum temperature inside concrete, the temperature difference between inside and outside, and the temperature difference between surface and environment are qualified, but the temperature difference control of cooling water inlet and outlet has hysteresis effect, and the temperature difference between inlet and outlet will be greater than 10°C, which should be noticed.

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14

Xiong, Qingchun, i Qinghua Zhou. "Development Trend of NC Machining Accuracy Control Technology for Aeronautical Structural Parts". World Journal of Engineering and Technology 08, nr 03 (2020): 266–79. http://dx.doi.org/10.4236/wjet.2020.83022.

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15

SONG, Pung Keun, i Yuzo SHIGESATO. "The Latest ITO Technology Innovating LCD Processes. Structural Control of TCO Films." Journal of the Surface Finishing Society of Japan 50, nr 9 (1999): 770–75. http://dx.doi.org/10.4139/sfj.50.770.

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16

Gang, Li, Liu Qifeng i Li Hongnan. "Inelastic Structural Control Based on MBC and FAM". Mathematical Problems in Engineering 2011 (2011): 1–18. http://dx.doi.org/10.1155/2011/460731.

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A complex structure has the characters of many degrees of freedom and intricate shape, especially inelastic behavior under strong external loadings. It is hard to apply the structural control technology to it. In this paper, a new method that combines the Market-Based Control (MBC) strategy and Force Analogy Method (FAM) is presented to analyze the inelastic behavior of structure with magnetorheological dampers. The MBC is used to reduce the structural vibration response, and FAM is proposed to perform the inelastic analysis. A numerical example is used to compare the control effect of the new method and LQR algorithm, which show the accuracy and efficiency of the proposed computational method.

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17

Xu, Jun Cai, Qing Wen Ren i Hai Wei. "Automatic Control Model of Concrete Temperature". Advanced Materials Research 261-263 (maj 2011): 344–47. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.344.

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Most temperature control measurement methods are based on artificial work with anti-cracking during concrete construction. Automatic temperature control model proposed to implement computer control technology in concrete structural construction temperature control with anti-cracking to create an automatic concrete temperature control model. The model is based on temperature sensation technology, wireless transmission technology, water-pipe cooling technology, numerical simulation for the concrete structure of dynamic simulation and real-time monitoring. It can implement concrete inner temperature control to prevent temperature stress from producing cracks in concrete structure.

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18

Gaudenzi, Paolo, i Gianluca Facchini. "Wireless Structural Sensing". Advanced Materials Research 745 (sierpień 2013): 155–65. http://dx.doi.org/10.4028/www.scientific.net/amr.745.155.

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The evolution of the smart structure technology on one side and the recent innovations in ICT have generated a new functionality in structural engineering: wireless structural sensing (WSS). This concept refers to the idea of measuring the structural response of a mechanical component and transmitting in remote the data to a control centre. WSS can be viewed as an extension of the features of a smart structure that includes now not only a sensing capability but also the possibility of transmitting signals, in the presence of a transceiver. In the paper, the characteristics of this technology and the potential outcomes in terms of products and services are illustrated. The constituent elements of the system are also described and the evolution of structural design for such structural systems is highlighted in terms of the driving design parameters. Some basic demonstrators produced by the research group of the authors are also illustrated as practical implementation of the WSS technology.

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19

Chiachío, Manuel, María Megía, Juan Chiachío, Juan Fernandez i María L. Jalón. "Structural digital twin framework: Formulation and technology integration". Automation in Construction 140 (sierpień 2022): 104333. http://dx.doi.org/10.1016/j.autcon.2022.104333.

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Measson, Y., O. David, F. Louveau i J. P. Friconneau. "Technology and control for hydraulic manipulators". Fusion Engineering and Design 69, nr 1-4 (wrzesień 2003): 129–34. http://dx.doi.org/10.1016/s0920-3796(03)00280-1.

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21

Kasai, Kazuhiko. "Special Issue on Japan’s Advanced Technology for Building Seismic Protection". Journal of Disaster Research 4, nr 3 (1.06.2009): 173–74. http://dx.doi.org/10.20965/jdr.2009.p0173.

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Modern buildings have more complex, important functions than ever before, and damage to these functions adversely impacted on socioeconomic activity during and after the 1995 Hyogo-Ken Nanbu Earthquake that leveled much of Kobe, Japan. Although many such buildings protected the lives of occupants, their impaired functioning required costly structural and nonstructural repair. Questions have been raised about conventional building structure performance enabling inelastic deformation or considerable damage during a major earthquake, as shown in Fig. 1a. Advanced technology such as building base isolation, shown in Fig. 1b, and passive control by dampers, shown in Fig. 1c, was developed prior to the Kobe disaster and became rapidly accepted after it, in line with a strong desire to better protect structural and nonstructural components. In base isolation, a building is placed on a flexible isolator that absorbs lateral ground movement, preventing vibration in the upper parts of the structure, as shown in Fig. 1b. In passive control, dampers connected to the structural frame dissipate seismic input energy, reducing kinetic energy and vibration of the building, as shown in Fig. 1c. Such advanced technology is currently used for all major buildings and even for small residences in Japan to better protect buildings and their contents. Japan has produced a large number of buildings with the technology, and is believed to have conducted the most extensive research in realizing base isolation and passive control schemes. This special issue of JDR addresses the present and future of Japan’s advanced technology with special reference to major activities related to design, construction, and research. Its purpose is to globally disseminate and share knowledge on promising schemes to help protect lives and social assets against catastrophic earthquakes. This issue covers the current status of base isolation and passive control schemes, unique projects promoting technology for structurally challenging cases, building requirements necessitating the use of advanced technology, the status of current codes and specifications, and new directions in technology. Papers in this issue were authored by leading structural designers and researchers in Japan, to whom we hereby express our deepest gratitude for their invaluable efforts.

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22

Zhu, Houyao, Zicong Chen, Jianhui Wang, Yunchang Huang, Wenli Chen, Zheng Huang i Huaqi Zhao. "Fuzzy Adaptive Compensation Control for Uncertain Building Structural Systems by Sliding-Mode Technology". Complexity 2018 (16.10.2018): 1–6. http://dx.doi.org/10.1155/2018/9801240.

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Earthquake is a kind of natural disaster, which will have a great impact on the building structure. In the vibration control field of building structures, the timeliness of system stability is extremely important. In traditional control methods, the timeliness is not paid enough attention for systems with uncertain seismic waves. For setting this problem, fuzzy adaptive compensation control for uncertain building structural systems by sliding-mode technology is proposed. It is combined with fuzzy adaptive control and sliding-mode control to ensure that the system can be stable with satisfied timeliness. Also, saturation function is used to ensure the feasible physical implementation of the control system. Compared with the traditional LQR (linear quadratic regulator) control, the simulation results showed that the proposed method can make the system reach a stable state with rapid convergence performance and has a feasible physical implementation.

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23

Liu, Si Meng, Fang Ping Liu i Lu Liu. "Bridge Structural Safety Assessment Technology Based on Statistic Analysis". Applied Mechanics and Materials 178-181 (maj 2012): 2486–91. http://dx.doi.org/10.4028/www.scientific.net/amm.178-181.2486.

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This paper aims to analyze the statistic rules of the live load effect and the degradation effect and propose some ideas on the bridge structural safety assessment on the condition that both effects closely relate to bridges’ structural performance. Besides, the technology of bridge structural safety assessment based on statistic analysis is also supported by a EWMA controlling Figure with double control limits suitable for bridge structures. After the application in the Ma Sang Xi Yangtze River Bridge project, the technology is proved as reliable, visualized, and perspective in application.

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24

Pashin, Jack C., i Richard H. Groshong. "Structural control of coalbed methane production in Alabama". International Journal of Coal Geology 38, nr 1-2 (grudzień 1998): 89–113. http://dx.doi.org/10.1016/s0166-5162(98)00034-2.

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Li, Ji Yang, i Wen Fang Zhang. "Brief Introduction of Traditional Seismic Technology and Emerging Isolation Technology". Advanced Materials Research 1010-1012 (sierpień 2014): 250–53. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.250.

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Seismic can be divided into passive seismic and active seismic. Seismic isolation technology belong to the second type. Base isolation structure is defined by setting the isolation layer between the superstructure and foundation building, to extend the natural period architecture, increasing the damping to reduce structural seismic response. It is a passive control system. Compared with the traditional seismic structure, it mainly through the isolation layer to absorb and dissipate energy, reducing the response to the earthquake.

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26

Fayomi, O. S. I., D. Olusanyan, C. A. Loto i N. E. Udoye. "Insight on the Electrodeposition Technology and Parameter for Corrosion Control of Structural Steel". IOP Conference Series: Materials Science and Engineering 1036, nr 1 (1.03.2021): 012056. http://dx.doi.org/10.1088/1757-899x/1036/1/012056.

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CUI, Huaifeng. "Active Structural Acoustic Control Technology of Enclosure Based on a Multi-agent System". Journal of Mechanical Engineering 49, nr 13 (2013): 85. http://dx.doi.org/10.3901/jme.2013.13.085.

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Serna, P., S. Arango, T. Ribeiro, A. M. Núñez i E. Garcia-Taengua. "Structural cast-in-place SFRC: technology, control criteria and recent applications in spain". Materials and Structures 42, nr 9 (31.07.2009): 1233–46. http://dx.doi.org/10.1617/s11527-009-9540-9.

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Firago, V. A., O. G. Devoino, A. S. Lapkovsky i A. N. Sobchuk. "CONTROL OF LASER PROCESSING OF STRUCTURAL MATERIALS USING THERMAL IMAGING AND SPECTRAL TECHNOLOGY". Journal of Applied Spectroscopy 89, nr 4 (20.07.2022): 568–79. http://dx.doi.org/10.47612/0514-7506-2022-89-4-568-579.

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The possibilities of thermal imaging and spectral technology in organization of the control of laser technological processes of high-temperature modification of structural materials are analyzed. It is shown that the application of thermal imaging technology is reasonable when adjusting these processes. For continuous control it is more perspective to apply small spectral technique. Solutions are proposed that allow continuous monitoring on the basis of determination of two parameters: the effective heating temperature Te of the treated surface in the area of influence of laser radiation and parameter a associated with the effective heating area. It is shown that introduction of small-sized spectral devices for continuous monitoring into the feedback loop of the control system for laser set-ups is promising.

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Emelianov, Mikhail. "Considering the information technology for structural health monitoring (SHM) systems". E3S Web of Conferences 97 (2019): 03011. http://dx.doi.org/10.1051/e3sconf/20199703011.

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The purpose of the research is to develop information technology for designing systems for monitoring load-bearing structures elements of buildings and structures of a high responsibility category based on the information about on the construction site and engineering survey results to obtain the automatic mode of results required for the development of these systems. The article describes the procedure for developing structural health monitoring (SHM) projects for the building and structures, based on the specific features of the development control and measuring system for building and structures and the engineering experience of designing these systems. The article presents the algorithms and macros that form the basis of the developed information technology, recommendations for determining the control parameters, the composition of the measuring equipment. The fundamentals of information technology development outlined in the article allow the development of algorithms and programs for the automated analysis of information about the construction and the construction site. The result of the analysis is the data necessary for the development of monitoring systems for buildings and structures of a higher category of responsibility.

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31

Li, Hongnan, i Linsheng Huo. "Advances in Structural Control in Civil Engineering in China". Mathematical Problems in Engineering 2010 (2010): 1–23. http://dx.doi.org/10.1155/2010/936081.

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In the recent years, much attention has been paid to the research and development of structural control techniques with particular emphasis on alleviation of wind and seismic responses of buildings and bridges in China. Structural control in civil engineering has been developed from the concept into a workable technology and applied into practical engineering structures. The aim of this paper is to review a state of the art of researches and applications of structural control in civil engineering in China. It includes the passive control, active control, hybrid controland semiactive control. Finally, the possible future directions of structural control in civil engineering in China are presented.

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32

Soong, T. T., i B. F. Spencer. "Active, semi-active and hybrid control of structures". Bulletin of the New Zealand Society for Earthquake Engineering 33, nr 3 (30.09.2000): 387–402. http://dx.doi.org/10.5459/bnzsee.33.3.387-402.

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In recent years, considerable attention has been paid to research and development of passive and active structural control devices, with particular emphasis on alleviation of wind and seismic response of buildings and bridges. In both areas, serious efforts have been undertaken to develop the structural control concept into a workable technology, and today we have many such devices installed in a wide variety of structures. The focus of this state-of-the-art paper is on active, semi-active and hybrid structural control with seismic applications. These systems employ controllable force devices integrated with sensors, controllers and real-time information processing. This paper includes a brief historical outline of their development and an assessment of the state-of-the-art and state-of-the-practice of this exciting, and still evolving, technology. Also included in the discussion are their advantages and limitations in the context of seismic design and retrofit of civil engineering structures.

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33

Baaklini, G. Y. "NDE Reliability and Process Control for Structural Ceramics". Journal of Engineering for Gas Turbines and Power 109, nr 3 (1.07.1987): 263–66. http://dx.doi.org/10.1115/1.3240034.

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The reliability of microfocus x-radiography and scanning laser acoustic microscopy for detecting microvoids in silicon nitride and silicon carbide was statistically evaluated. Materials and process-related parameters that influenced the statistical findings in research samples are discussed. The use of conventional x-radiography in controlling and optimizing the processing and sintering of an Si3N4-SiO2-Y2O3 composition designated NASA 6Y is described. Radiographic evaluation and guidance helped develop uniform high-density Si3N4 modulus-of-rupture bars with improved four-point flexural strength (857, 544, and 462 MPa at room temperature, 1200°C, and 1370°C, respectively) and reduced strength scatter.

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34

Fonnesbech, Jens Kr. "Ice Control Technology with 20 Percent Brine on Highways". Transportation Research Record: Journal of the Transportation Research Board 1741, nr 1 (styczeń 2001): 54–59. http://dx.doi.org/10.3141/1741-09.

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Du, Hai Cun. "Research on Intelligent Variable Frequency of Air-Conditioner Control System Based on Fuzzy Control". Applied Mechanics and Materials 110-116 (październik 2011): 4076–84. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.4076.

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In this paper, we determine the fuzzy control strategy of inverter air conditioner, the fuzzy control model structure, the neural network and fuzzy control technology, structural design of the fuzzy neural network controller as well as the neural network predictor FNNC NNP. Simulation results show that the fuzzy neural network controller can control the accuracy greatly improved the compressor, and the control system has strong adaptability to achieve a truly intelligent; model of the controller design and implementation of technology are mainly from the practical point of view, which is practical and feasible.

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Huang, Guo Jian, Dong Hui Wang, Wei Xiong Wang i Xin Hua Wang. "Structural Health Monitoring of Gantry Crane Based on EDGE Technology". Applied Mechanics and Materials 333-335 (lipiec 2013): 1629–34. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.1629.

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The closely combination of Internet of Things and on-site monitoring and control technology is the development tendency of the site monitoring and control technology, especially the special equipment safety monitoring technology. EDGE technology is one way of Internet of Things technology realization. EDGE technology is a digital mobile phone technology which allows improved data transmission rates as a backward-compatible extension of GSM. It is also considered as a pre-3G (2.75G) radio technology and is part of ITU's 3G definition. It is used as one of the aims of the project which allows the operators to keep abreast of the crane operation status. Then a software platform is developed to monitor the real-time stress. A software platform is developed via a lot of preliminary work as mentioned above. The information is collected by FBG sensors and transmitted to the demodulator, and then the software calculates strain by a formula given in. Finally we acquire the real-time stress in different parts of the crane. If the real-time stress exceeds the allowable stress, it issues an alarm signal to the operator.

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Fan, Maohong, Radisav D. Vidic, Dionysios (Dion) D. Dionysiou i Raymond A. Ferrara. "Recent Developments in CO2 Emission Control Technology". Journal of Environmental Engineering 135, nr 6 (czerwiec 2009): 377. http://dx.doi.org/10.1061/(asce)ee.1943-7870.0000070.

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Zhang, Chengyi, i David Arditi. "Automated progress control using laser scanning technology". Automation in Construction 36 (grudzień 2013): 108–16. http://dx.doi.org/10.1016/j.autcon.2013.08.012.

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Lu, Fei, Fan Chen i Qianye Zhang. "Key Technology of Lifting Cushion Device Design". Advances in Higher Education 3, nr 4 (17.12.2019): 28. http://dx.doi.org/10.18686/ahe.v3i4.1522.

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<p>To reduce inertia brake role in the process of ascension, this paper puts forward a new kind of improve buffer device, involving the overall design of the structural system, key technology and implementation plan. Including parts production and assembly technology, based on the technical advancement and reliability of the research. Ensure the safety and reliability of the device, solve the problem of structural instability control during the lifting process and have good engineering benefits.</p>

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40

Wang, Qinzheng, Xianfeng “Terry” Yang i Yun Yuan. "Dynamic Multipath Signal Progression Control Based on Connected Vehicle Technology". Journal of Transportation Engineering, Part A: Systems 147, nr 10 (październik 2021): 04021054. http://dx.doi.org/10.1061/jtepbs.0000565.

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Wu, Chengjia, Tao Qin, Lei Wang i Zhi Liu. "Research on Surrounding Rock Control Technology of Dongbaowei Deep Mining Roadway". Advances in Civil Engineering 2021 (18.01.2021): 1–10. http://dx.doi.org/10.1155/2021/6660989.

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In order to explore the stability control of surrounding rock in the process of deep mining, comparative analysis of stress, deformation, and fracture characteristics of surrounding rock of deep and shallow mining roadway in dongbaotou coal mine, laboratory experiments, field measurement, numerical simulation, and field industrial experiments were adopted to put forward the control plan of the surrounding rock in deep roadway, which were verified by field industrial experiments. The results of laboratory experiments and field experiments show that the mechanical properties of deep roadway surrounding rock of Dongbaowei Coal Mine are significantly lower than those of the shadow roadway, mainly due to the development of joints and fractures of the overlying strata in the deep stope, serious impact on the disturbance of the roadway which has been made by the strong pressure of the stope, and reduced crushing strength of surrounding rock. Through comparative analysis of deep roadway support plan carried out by numerical simulation, the support scheme suitable for Dongbaowei Coal Mine is put forward, which is applied in the field. Field industrial experiments show that after the optimization of support parameters, the deformation of surrounding rock of roadway is well controlled. The displacement of surrounding rock of roadway is basically stable after 10∼15 days. The support of surrounding rock of roadway has good effect, which achieves the goal of stability control of deep roadway surrounding rock.

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Zhu, Xiaojun, Feng Zha, Guangli Guo, Pengfei Zhang, Hua Cheng, Hui Liu i Xiaoyu Yang. "Subsidence Control Design Method and Application to Backfill-Strip Mining Technology". Advances in Civil Engineering 2021 (12.10.2021): 1–15. http://dx.doi.org/10.1155/2021/5177174.

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Intensive and massive coal mining causes a series of geological hazards and environmental problems, especially surface subsidence. At present, two major types of subsidence control technology are applied: backfilling technology and partial mining technology. However, the cost of backfill mining is high and partial mining has a low recovery ratio. Therefore, the backfill-strip mining is used to solve the problems of high cost and shortage of filling materials in coal mines at present. A subsidence control design method of backfill-strip mining was proposed in this paper based on the subsidence control effects and economic benefits. First, the stability of the composite support pillar of the filling body and coal pillars in the backfill-strip mining is analyzed, and the values of the main subsidence influencing factors that include the filling material, the size of the backfilling working face, caving mining face, and residual coal pillar are preliminarily determined. Then, the surface movement and deformation are predicted based on the equivalent superposition probability integral method (PIM). The subsidence influencing factors are optimized and determined by comparing the requirements of the safety fortification index of the antideformation ability of surface buildings, resource recovery rate, and coal mining cost. Finally, the mining scheme design parameters of the backfill-strip mining technology are determined. This method is applied in the subsidence control design of backfill-strip mining in the Ezhuang coal mine. Research results show that backfill-strip mining can ensure the safety of surface buildings, increase the resource recovery rate, and reduce coal mining costs through the reasonable design of this method. This study can provide scientific guidance for subsidence disaster control, prevention, and engineering design in backfill-strip mining.

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De Breuker, Roeland, Tigran Mkhoyan, Nakash Nazeer, Vincent Stuber, Xuerui Wang, Iren Mkhoyan, Roger Groves, Sybrand van der Zwaag i Jurij Sodja. "Overview of the SmartX Wing Technology Integrator". Actuators 11, nr 10 (20.10.2022): 302. http://dx.doi.org/10.3390/act11100302.

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This article describes the challenges of integrating smart sensing, actuation, and control concepts into an over-sensed and over-actuated technology integrator. This technology integrator has more control inputs than the expected responses or outputs (over-actuated), and its every state is measured using more than one sensor system (over-sensed). The hardware integration platform is chosen to be a wind tunnel model of a low-speed aircraft wing such that it can be tested in a large university-level wind tunnel. This hardware technology integrator is designed for multiple objectives. The nature of these objectives is aerodynamic, structural, and aeroelastic, or, more specifically; drag reduction, static and dynamics loads control, aeroelastic stability control, and lift control. Enabling technologies, such as morphing, piezoelectric actuation and sensing, and fibre-optic sensing are selected to fulfil the mentioned objectives. The technology integration challenges are morphing, actuation integration, sensor integration, software and data integration, and control system integration. The built demonstrator shows the intended level of technology integration.

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Zhu, Benchi, Zhuang Mu, Wenbo He, Longxin Fan, Guolong Zhao i Yinfei Yang. "Research on Clamping Action Control Technology for Floating Fixtures". Materials 15, nr 16 (13.08.2022): 5571. http://dx.doi.org/10.3390/ma15165571.

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By adaptively releasing deformation during machining, floating clamping significantly raises the machining quality of aircraft structural parts. The fundamental issue to be resolved is how to precisely control the clamping action of the floating fixtures. In this study, the machining process of aircraft beams was studied, utilizing the finite element method (FEM) from the perspective of strain energy evolution. The study found that the increment of deformation and the variation of the strain energy between adjacent removed layers of the material showed the same trend of change, and targeted clamping loosening at the stage of an excessive strain energy evolution gradient is beneficial to reducing the final deformation of the workpiece. Therefore, a clamping action control method based on strain energy evolution gradient regulation is proposed, and a clamping action control strategy of floating fixtures was formulated. Furthermore, a cutting experiment was carried out, and the results showed that the maximum deformation of the aircraft beam using the clamping action control strategy was only 0.112 mm, which was reduced by 74.6% compared to traditional clamping.

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Barannik, Volodymyr, Yuriy Ryabukha, Pavlo Hurzhii, Vitalii Tverdokhlib i Oleh Kulitsa. "TRANSFORMANTS CODING TECHNOLOGY IN THE CONTROL SYSTEM OF VIDEO STREAMS BIT RATE". Cybersecurity: Education, Science, Technique 3, nr 7 (2020): 63–71. http://dx.doi.org/10.28925/2663-4023.2020.7.6371.

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The conceptual basements of constructing an effective encoding method within the bit rate control module of video traffic in the video data processing system at the source level are considered. The essence of using the proposed method in the course of the video stream bit rate controlling disclosed, namely, the principles of constructing the fragment of the frame code representation and approaches for determining the structural units of the individual video frame within which the control is performed. The method focuses on processing the bit representation of the DCT transformants, and at this processing stage transformant was considered as a structural component of the video stream frame at which the encoding is performed. At the same time, to ensure the video traffic bit rate controlling flexibility, decomposition is performed with respect to each of the transformants to the level of the plurality of bit planes. It is argued that the proposed approach is potentially capable to reducing the video stream bit rate in the worst conditions, that is, when component coding is performed. In addition, this principle of video stream fragmen code representation forming allows to control the level of error that can be made in the bit rate control process. However, in conditions where the bit representation of the transformant is encoded, the method is able to provide higher compression rates as a result of the fact that the values of the detection probability of binary series lengths and the values of detected lengths within the bit plane will be greater than in the case of component coding. This is explained by the structural features of the distribution of binary elements within each of the bit planes, which together form the transformer DCT. In particular, high-frequency transformer regions are most often formed by chains of zero elements. The solutions proposed in the development of the encoding method are able to provide sufficient flexibility to control the bit rate of the video stream, as well as the ability to quickly change the bit rate in a wide range of values.

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Zhang, Hao Jie, Zi Qiang Peng, Bao Lai Li i Xiao Chun Fan. "Control Technology on Jacking Closure Construction of Liangjiang Great Bridge". Applied Mechanics and Materials 587-589 (lipiec 2014): 1430–34. http://dx.doi.org/10.4028/www.scientific.net/amm.587-589.1430.

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Prestressed concrete continuous rigid frame bridge is widely used in bridge engineering. Its closure is one of very important working procedure in the bridge construction. In this paper, taking Liangjiang Great Bridge in Xinxu Highway as an example, the methods for determining the Jacking force and displacement are discussed. The implementation of the process and construction technology of closure jacking scheme is introduced in detail. Through the finite element simulation, the stress state of on the structural pusher is analyzed. And the maximum stress of the pier bottom and the displacement of the pier top are obtained. They can verify the feasibility of the scheme. Monitoring results from the site construction verify the safety of the scheme. The method has a certain reference value on jacking closure construction for the similar bridge.

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Kowalski, K. J., A. J. Brzeziński, J. B. Król, P. Radziszewski i Ł. Szymański. "Traffic Analysis and Pavement Technology as a Tool for Urban Noise Control". Archives of Civil Engineering 61, nr 4 (1.12.2015): 107–26. http://dx.doi.org/10.1515/ace-2015-0039.

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Traffic related noise is currently considered as an environmental pollution. Paper presents results of multidirectional study attempting to serve urban traffic without the need to erect noise barriers interfering urban space. Initial concept of the road expansion included construction of 1000 m of noise barriers dividing city space. Improvement in the acoustic conditions after construction completion is possible due to the applied noise protection measures: vehicle speed limit, smooth of traffic flow, use of road pavement of reduced noise emission and the technical improvement of the tramway.

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Luyanda, Felipe, Douglas Gettman, Larry Head, Steven Shelby, Darcy Bullock i Pitu Mirchandani. "ACS-Lite Algorithmic Architecture: Applying Adaptive Control System Technology to Closed-Loop Traffic Signal Control Systems". Transportation Research Record: Journal of the Transportation Research Board 1856, nr 1 (styczeń 2003): 175–84. http://dx.doi.org/10.3141/1856-19.

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ACS-Lite is being developed by FHWA to be a cost-effective solution for applying adaptive control system (ACS) technology to current, state-of-the-practice closed-loop traffic signal control systems. This effort is intended to make ACS technology accessible to many jurisdictions without the upgrade and maintenance costs required to implement ACS systems that provide optimized signal timings on a second-by-second basis. The ACS-Lite system includes three major algorithmic components: a time-of-day (TOD) tuner, a run-time refiner, and a transition manager. The TOD tuner maintains plan parameters (cycle, splits, and offsets) as the long-term traffic conditions change. The run-time refiner modifies the cycle, splits, and offsets of the plan that is currently running based on observation of traffic conditions that are outside the normal bounds of conditions this plan is designed to handle. The run-time refiner also determines the best time to transition from the current plan to the next plan in the schedule, or, like a traffic-responsive system, it might transition to a plan that is not scheduled next in the sequence. The transition manager selects from the transition methods built in to the local controllers to balance the time spent out of coordination with the delay and congestion that is potentially caused by getting back into step as quickly as possible. These components of the ACS-Lite algorithm architecture are described and the similarities and differences of ACS-Lite with state-of-the-art and state-of-the-practice adaptive control algorithms are discussed. Closed-loop control system characteristics are summarized to give the context in which ACS-Lite is intended to operate.

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Harrison, Michael I. "Professional Control as Process: Beyond Structural Theories". Human Relations 47, nr 10 (październik 1994): 1201–31. http://dx.doi.org/10.1177/001872679404701003.

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HONGNAN, LI, i HUO LINSHENG. "RECENT DEVELOPMENTS OF STRUCTURAL VIBRATION CONTROL IN CIVIL ENGINEERING IN CHINA". Journal of Earthquake and Tsunami 04, nr 01 (marzec 2010): 9–21. http://dx.doi.org/10.1142/s1793431110000601.

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In recent years, much attention has been paid to research and development of structural control techniques with particular emphasis on alleviation of wind and seismic response of buildings and bridges in China. Structural control in civil engineering has been developed from the concept into a workable technology and applied into practical engineering structures. The aim of this paper is to review a state-of-the-art of researches and application of structural control in civil engineering in China. It includes the passive control, active control, hybrid control, and semi-active control. Finally, the possible future directions of structural control in civil engineering in China are presented.

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