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Copyright of China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Automotive Digest is the property of Automotive Digest Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Refrigeration is the property of Journal of Refrigeration Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Automotive Engineer (1674-6546) is the property of Auto Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to actively respond to the national dual carbon policy and promote the sustainable development of railway wireless communication system, this paper analyzes the green operation strategy of railway 5G-R based on the green development of 5G base stations in the public network and the application characteristics of railway wireless communication services. The green operation of railway 5G-R is analyzed mainly from three aspects: base station energy-saving control, base station new energy technology, and integrated application of intelligent air conditioning control technology and fresh air energy saving technology in base station machine room, and the main research contents are proposed. It is hoped that it will have certain reference and guiding significance for the research on green operation of railway 5G-R base stations. [ABSTRACT FROM AUTHOR]

Copyright of Rolling Stock (1002-7602) is the property of Rolling Stock Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Xi'an Polytechnic University is the property of Editorial Department of Journal of Xi'an Polytechnic University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Chongqing University of Technology (Natural Science) is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Chongqing University of Technology (Natural Science) is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Control Theory & Applications / Kongzhi Lilun Yu Yinyong is the property of Editorial Department of Control Theory & Applications and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Refrigeration Technology is the property of Shanghai Society of Refrigeration and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Beijing University of Technology is the property of Journal of Beijing University of Technology, Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To achieve the goals of carbon emission-peak and carbon neutrality, the energy conservation problem of subway air-conditioning system has become more and more prominent. Since the load of the subway equipment management room varies obviously with the start and stop of the equipment, the traditional air-conditioning system of constant air volume cannot change the air supply volume of the system, which would cause the waste of the cooling capacity. The air-conditioning system of variable air volume can be used to achieve the air supply on demand for different rooms at different times. This paper builds a simulation platform of the VAV air-conditioning system for a subway station in Zhengzhou and the platform is integrated with the load model of the subway equipment room to achieve on-demand air supply. The simulation platform is used to simulate the control characteristics and air volume characteristics of the VAV system. By adjusting the valve opening of the VAV-box terminal, the demanded air volume of the room is supplied on according to different load demands. The results show that the actual operating air volume basically matches the demand air volume and the deviation is less than 1%. The control effects of room temperature between the constant air volume system and the VAV system are compared. The room temperature with the constant air volume system is decreased to 34 °C, which is lower than the design temperature of 36 °. While, the room temperature with the VAV system can be precisely controlled at 36 °, and the waste of cooling capacity is avoided. [ABSTRACT FROM AUTHOR]

Copyright of Nuclear Safety is the property of Nuclear & Radiation Safety Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rolling Stock (1002-7602) is the property of Rolling Stock Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The equipment supercooling problems have been observed in the operating condition of the air supply system in some pumped storage power stations. It is a critical safety risk for the air supply system when it is working with the compressed air. Especially for the different valves in the pipelines, which feature short-length and complex internal structure, usually cause air velocity increasing rapidly and temperature decreasing sharply, challenging the system sealing performance and connection strength. Since the numerical simulation researches about air supply system are still rarely reported, it puts forward the urgent need of some related researches. In this paper, the SA turbulence model is adopted for the transient full-channel numerical simulation research on the air supply system of pumped storage power stations. Present work puts emphasis on the extreme temperature decreasing phenomenon of the valves, occurring when the air supply system releases highly compressed air to drain the water out of the runner chamber. And some critical aspects of the above valve temperature-drop problem, including the occurrence location, drop level and mechanism are focused on and analyzed. [ABSTRACT FROM AUTHOR]

Copyright of Experimental Technology & Management is the property of Experimental Technology & Management Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of New Architecture is the property of New Architecture Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of South Architecture / Nanfang Jianzhu is the property of South Architecture Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A three-degree-of-freedom fighter model is established to solve the maneuver decision problem in cooperative air combat, and an extended basic maneuver decision set is designed according to the pilot's actual operation in air combat. The air combat situation assessment model is established by constructing angle, velocity, distance and altitude superiority functions. Based on group decision making theory, Cook-Seiford decision making algorithm is designed and applied to the research of multi-aircraft cooperative air combat maneuver decision making for the first time, which effectively optimizes the decision flow. Under the initial situation disadvantage, Cook-Seiford group decision algorithm, Copeland and Dodgson group decision algorithm are used to simulate adversarial air combat under typical air combat conditions of 2 versus 2 and 3 versus 2. The simulation results show that the cooperative maneuver decision algorithm based on Cook-Seiford group decision algorithm can effectively obtain obvious countermeasures advantage, which verifies the effectiveness and superiority of the algorithm designed in this paper, and provides a new idea for using the group decision algorithm to solve multi-aircraft cooperative air combat decision. [ABSTRACT FROM AUTHOR]

Copyright of Rolling Stock (1002-7602) is the property of Rolling Stock Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Chongqing University of Technology (Natural Science) is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Shanghai Jiao Tong University (1006-2467) is the property of Journal of Shanghai Jiao Tong University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Smart Rail Transit is the property of Smart Rail Transit Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to maintain thermal comfort of the cabin environment of a pure electric vehicle and improve efficiency of energy use, this paper studies the control strategy of the heat pump air conditioning system for pure electric vehicles. AMESim is used to build a cabin simulation platform of the pure electric vehicle heat pump air conditioning system, and three control strategies are designed : compressor on/off control strategy, PID control strategy and fuzzy control strategy. Matlab/Simulink is used to simulate the three control strategies respectively, and then feedforward control is added and simulated on the basis of the fuzzy control strategy. The results show that the COP values under the compressor on/off control strategy, the PID) control strategy and the fuzzy control strategy are about 1.5, 1.8 and 1.85 respectively; the temperature fluctuation is about 0.5 °C before the introduction of feedforward control, and there is no significant change after the introduction. The control performance of the fuzzy control strategy is better than that of the compressor on/off control and the PID) control in terms of dynamic response and energy efficiency ratio of the system; after adding the feedforward control, the fuzzy control strategy effectively improves the dynamic response of the system when the external environment changes, and reduces the fluctuation of the cabin temperature. [ABSTRACT FROM AUTHOR]

Copyright of Rolling Stock (1002-7602) is the property of Rolling Stock Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Beijing University of Technology is the property of Journal of Beijing University of Technology, Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food & Machinery is the property of Food & Machinery Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rolling Stock (1002-7602) is the property of Rolling Stock Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science & Technology of Food Industry is the property of Science & Technology of Food Industry Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Guangdong Architecture Civil Engineering is the property of Guangdong Architecture Civil Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to improve the energy efficiency and cooling performance of evaporative cooling air conditioning system, the problems existing in the thermal process of traditional evaporative cooling air conditioning system were analyzed in this paper, and a dew point evaporative cooling air conditioning system based on cross flow dew point indirect evaporative cooler was proposed. An analytical model of air treatment process of dew point evaporative cooling air conditioning system is established. Thermodynamic calculation and analysis are carried out under typical working conditions, and the calculation results are compared with the traditional evaporative cooling system. The results showed that the air supply temperature of dew point evaporative cooling system is 1.7 ℃ lower than that of traditional evaporative cooling system, and the moisture content is 0.9 g/kg lower. At the same time, when the exergy efficiency is increased by about 2%,the effective output of exergy is increased by about 16.9%.It shows that the dew point evaporative cooling system has better thermodynamic performance than the traditional evaporative cooling system. [ABSTRACT FROM AUTHOR]

Copyright of Railway Standard Design is the property of Railway Standard Design Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Aiming at the application of prognostic and health management（PHM）technology in civil aircraft maintenance engineering，this paper discusses the design of predictive maintenance mode based on PHM，and puts forward the analysis process of initial maintenance task considering PHM and the implementation method of predictive maintenance mode based on PHM. Taking B737NG air conditioning system as an example，the validation research is carried out，the PHM model of air conditioning system based on data drive is established，the PHM maintenance mode of air conditioning system is designed，and the maintenance cost under planned maintenance mode and predicted maintenance mode is compared and analyzed based on historical operation data. The results show that the maintenance mode based on PHM can both cancel some regular inspections，and reduce unplanned maintenance events through early monitoring，so as to reduce the life‑cycle maintenance cost of civil aircraft system. Cost benefit analysis shows that compared with traditional planned maintenance，PHM maintenance can reduce the cost by more than 40%. Further popularization and application to other systems of the whole machine will bring greater economic and safety benefits. [ABSTRACT FROM AUTHOR]

Copyright of Rolling Stock (1002-7602) is the property of Rolling Stock Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Smart Rail Transit is the property of Smart Rail Transit Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To solve data imbalance and insufficient prior knowledge problems in using quick access recorder （QAR）for health management and abnormal detection of large passenger aircraft air⁃conditioning system, this paper carries out an algorithm based on improved fuzzy C⁃means （FCM） to evaluate components degradation status. This algorithm is to calculate the distance between fault state and normal state. Based on the physical characteristics of large passenger aircraft’s air⁃conditioning system, the distance function of FCM algorithm is improved, and the difference of the left and the right packs is adopted as the evaluation standard. The overfitting problem of current methods is effectively solved, and the improved FCM algorithm is more sensitive to the degradation of the components in the early stage. It can also effectively reflect the intermediate process of performance degradation. This study provids strong technical support for airlines in arranging maintenance plan and reducing operation cost. [ABSTRACT FROM AUTHOR]

In order to improve energy efficiency and overcome the shortcomings of single refrigeration technology, a new type of composite refrigeration air-conditioning system driven by low grade energy is proposed:solar energy refrigeration and dew point evaporative cooling coupling air-conditioning system. Take a project in Nanjing as an example. The cooling capacity, power consumption and coefficient of performance of dew-point evaporative cooling subsystem and solar ejector refrigeration subsystem are calculated and analyzed respectively. By comparing the Pcop with indirect evaporative cooling-ejector refrigeration air conditioning system, it is concluded that the system performance of the proposed system increases by 6.38%, and the energy saving is about 6%. Compared with the traditional mechanical compression refrigeration system, the Pcop of the proposed system is increases by more than 70% and the power consumption is reduced by 44%. In the last part of this paper, the initial investment and operating cost of the composite system was analyzed, showing that the system can save 476.5 RMB annually, with a payback period of 6 years. It is economical and environmentally friendly. [ABSTRACT FROM AUTHOR]

In order to explore the applicability and application characteristics of water-side evaporative cooling technology in data center, this paper discusses the thermal environment characteristics of data center and the temperature relationship in the heat transfer process of air conditioning system in computer room, and analyzes the application cases of open cooling tower, closed cooling tower and evaporative cooling chiller in data center. It is concluded that data centers in dry areas with outdoor air conditioning design and wet-bulb temperature lower than 22 °C in summer can completely use water side evaporative cooling to provide cooling for data centers, and the auxiliary mechanical cooling mode in non-dry areas is beneficial to improve the natural cooling time of data centers. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Railway Science & Engineering is the property of Journal of Railway Science & Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Cotton Textile Technology is the property of Cotton Textile Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mycosystema is the property of Mycosystema Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objectives] In response to the need for improved habitability arising from the harsh environment of submarine accommodation, this paper studies the conditioned air distribution for submarine accommodation equipped with spherical air distributors,and evaluate the thermal comfort of the accommodation.[Methods] A high-precision three-dimensional model of accommodation is constructed with CATIA,and according to the actual boundary conditions,the numerical simulation of air distribution in the accommodation under surface and underwater conditions in summer and winter,and the numerical simulation of the conditioned air distribution in the accommodation with spherical air distributors under summer surface condition are carried out by using the Computational Fluid Dynamics(CFD)technology. Besides,the distribution of the air temperature and velocity in the accommodation under each working condition is analyzed and compared,and the PMV value of the accommodation is calculated and analyzed.[Results] It is shown that the PMV values of the accommodation are -1-1 under each working condition, the air velocity distribution in most areas of the accommodation is uniform,with the average air velocity of less than 0.3 m/s,and the temperature distribution in most areas of the accommodation is uniform,with average air temperature of about 24.5-26℃ in summer,and about 22-23.5℃ in winter.[Conclusions] The typical air conditioning comfort of the submarine accommodation equipped with spherical air distributors is up to the standard.