Research Institute of Physical and Chemical Engineering of Nuclear Industry
Research Institute of Physical and Chemical Engineering of Nuclear Industry
Cheng H.,Qingdao University of Science and Technology |
Zhang Y.,Qingdao University of Science and Technology |
Kong L.,Research Institute of Physical and Chemical Engineering of Nuclear Industry |
Meng X.,Qingdao University of Science and Technology
IOP Conference Series: Earth and Environmental Science | Year: 2017
Light gasoline etherification technology can effectively improve the quality of gasoline, which is environmental- friendly and economical. By combining BP neural network and PID control and using BP neural network self-learning ability for online parameter tuning, this method optimizes the parameters of PID controller and applies this to the Fcc gas flow control to achieve the control of the final product- heavy oil concentration. Finally, through MATLAB simulation, it is found that the PID control based on BP neural network has better controlling effect than traditional PID control. © Published under licence by IOP Publishing Ltd.
Yang J.,Beihang University |
Li L.,Beihang University |
Yang L.,Research Institute of Physical and Chemical Engineering of Nuclear Industry |
Li J.,Research Institute of Physical and Chemical Engineering of Nuclear Industry
Applied Thermal Engineering | Year: 2017
Total thermal resistance (TTR) is the main index to weigh the heat transfer capability of the pin-fins channel heat sink (PFCHS). The structural parameters and operational parameters of the PFCHS are important factors to influence the TTR of PFCHS. With the goal of achieving the lowest TTR of the PFCHS and modeling the relationship between the parameters and TTR, the structure of the PFCHS is illustrated in detail. Then, we schedule the experimental plan for the PFCHS based on the uniform design (UD), where the width of PFCHS, height of pin-fins, pressure drop of the fluid and power of the heat source are defined as the control parameters. According to the experimental data, a regression model is obtained to describe the relation between the control parameters and TTR, and then the optimal combination of the control parameters is determined. Verification tests show that the effectivity of the optimal parameters and the validity of the regression model. © 2017 Elsevier Ltd
Wu C.,Nanjing Southeast University |
Song A.,Nanjing Southeast University |
Li H.,Nanjing Southeast University |
Xu B.,Nanjing Southeast University |
Xu X.,Research Institute of Physical and Chemical Engineering of Nuclear Industry
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | Year: 2014
Aiming at the demand of rehabilitation training of upper limb hemiplegia patients, a gesture adjustable rehabilitation training robot is proposed. The composition of the robot is described. The kinematics analysis of the designed robot mechanism is conducted, and the transformation matrix and the Jacobian matrix of various links of the robot are obtained. On the basis of the description of the robot system architecture, a controller with affected limb condition monitoring function was designed, which satisfies the trajectory tracking requirement of the robot in rehabilitation training process; and when abnormal phenomena such as twitches occur, the robot can release the bondage of the robot on the affected limb timely to avoid secondary injury to the affected limb. Experiment was conducted to verify the proposed design; the experiment results prove the effectiveness of the designed rehabilitation training robot system.
Tao L.-R.,Research Institute of Physical and Chemical Engineering of Nuclear Industry
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2014
The model of rigid cascade was built up in this paper. The model has two pipe lines, and there is waste orifice plate in each stage of rigid cascade. The parameters influencing effect of rigid cascade are mainly orifice plate size and feed flow. The two factors were analyzed and compared. The calculation results indicate that the product concentration minishes with the increase of feed flow. The influence on waste was obvious. The influence of orifice plate size on the product in cascade is larger than that on waste. When the orifice plate size deviates to the original size, smaller size is chosen.
Li J.,Tianjin University of Technology and Education |
Guo Y.-G.,Research Institute of Physical and Chemical Engineering of Nuclear Industry
2010 International Conference on E-Product E-Service and E-Entertainment, ICEEE2010 | Year: 2010
This article introduces the make-up and principle of intelligent wheat dampen control system, establishes system mathematical models , analyses PID control and the fuzzy roles of parameter on-line dynamic self -tuning, develops a fuzzy PID controller. ©2010 IEEE.
Song T.,Tsinghua University |
Zeng S.,Tsinghua University |
Sulaberidze G.,National Research Nuclear University MEPhI |
Borisevich V.,National Research Nuclear University MEPhI |
Xie Q.,Research Institute of Physical and Chemical Engineering of Nuclear Industry
Separation Science and Technology | Year: 2010
The possibility of estimating the minimum total flow in a cascade with concentrations of a target component given in the product and waste flows by means of a model match abundance ratio cascade (MARC) is studied. The parameters required to describe MARC characteristics are the total number of separation stages, the feed flow location, and the M* parameter, which is equal to a half-sum of mass numbers of the target and the supporting components. Specific research carried out independently in two scientific labs in China and Russia has demonstrated that the integral parameters of the MARC, optimized by the M* parameter, are very close to that of the optimum by the minimum total flow cascade found by means of numerical optimization. The calculation is performed for separation of krypton isotopes when the end component 78Kr and the intermediate component 83Kr are considered to be the targets. It paves the way to use the optimized MARC parameters for two purposes: first, for fast and easy evaluation of the real cascade parameters and second, as an initial guess in its further direct numerical optimization, thereby allowing significant savings in computation time. © Taylor & Francis Group, LLC.
Cheng H.X.,Qingdao University of Science and Technology |
Zhang G.Q.,Qingdao University of Science and Technology |
Li J.,Qingdao University of Science and Technology |
Cheng L.,CAS Xinjiang Technical Institute of Physics and Chemistry |
Kong L.L.,Research Institute of Physical and Chemical Engineering of Nuclear Industry
Advances in Energy, Environment and Materials Science - Proceedings of the International Conference on Energy, Environment and Materials Science, EEMS 2015 | Year: 2016
For the character of nonlinear and the time-varying in industrial boiler liquid level control process, which has been difficult to meet the requirements of control precision of nonlinear system based on the conventional PID cascade control, the paper puts forward the boiler liquid level control based on fuzzy neural network. It aims to put the self-learning ability of neural network into fuzzy control, which does not need to establish specific mathematical model to achieve the level control. Through the MATLAB design and simulation of the boiler liquid level system, the results are compared with the conventional PID control and fuzzy PID control, then it shows that the method is effective. © 2016 Taylor & Francis Group, London.
Li H.,Tsinghua University |
Wang P.,Research Institute of Physical and Chemical Engineering of Nuclear Industry |
Wang X.,University of Science and Technology of China |
You W.,Xi'an Jiaotong University |
And 2 more authors.
Gaodianya Jishu/High Voltage Engineering | Year: 2015
Atomic vapor laser isotope separation process involves the metal atomization sub-process, selective excitation and ionization sub-process of the isotope atoms of interest, and the ion extraction and collection sub-process. In order to understand the mechanisms of the atomic vapor laser isotope separation process, we summarized and reviewed the state-of-the-art of the theoretical, especially, the numerical methods used for studying the preceding sub-processes, including the fluid model for describing the heat transfer and flow patterns inside a crucible and the direct simulation Monte Carlo or Bhantagar-Gross-Krood (BGK) equations for studying the metal evaporation and expansion in the metal atomization sub-process, the semi-classical theory and classical rate equations for the description of the laser photo-ionization sub-process, the fluid model with an assumption of Boltzmann electron density distribution and the particle-in-cell with Monte Carlo collision (PIC-MCC) method for predicting the ion extraction sub-process, and the major research results concerning the atomic vapor laser isotope separation process based on the preceding methods. Moreover, we discussed the further possible research. This is helpful for the future studies in this field. ©, 2015, Science Press. All right reserved.
Smirnov A.,National Research Nuclear University MEPhI |
Sulaberidze G.A.,National Research Nuclear University MEPhI |
Xie Q.,Research Institute of Physical and Chemical Engineering of Nuclear Industry |
Borisevich V.D.,National Research Nuclear University MEPhI
Chemical Engineering Research and Design | Year: 2015
A method to produce relatively high concentrations of intermediate components from isotope mixtures in a separation cascade with local extension of a working substance flow at its inner stages is demonstrated. The cascade under consideration consists of two square parts of different width and has 4 external flows: the feed and waste ones and the end and interjacent product flows. The research demonstrates that the cascade with flow extension built by simple reshaping of a square cascade enables provide considerable increasing an intermediate component concentration in an interjacent product flow in comparison with the conventional 4 flows square cascade having the same values of the total and additional flows. In the example, it was examined enrichment of the 183W isotope for which an increase in concentration provided by a cascade with flow extension is about 5 abs% whereas the compared cascades keep at their end product flows almost the same concentration of separating components. © 2015 The Institution of Chemical Engineers.
Chai J.,Research Institute of Physical and Chemical Engineering of Nuclear Industry |
Chen R.,Research Institute of Physical and Chemical Engineering of Nuclear Industry |
Xu W.,Research Institute of Physical and Chemical Engineering of Nuclear Industry
Guangxue Xuebao/Acta Optica Sinica | Year: 2015
According to physical process of light induced drift (LID) and hyperfine structure of lithium absorbing spectrum, the Boltzmann collision equation of gas diffusion and density matrix equation of semiclassical theory are combined to gain the dynamic simulation model of LID, in which, the delay time approximation and chaotic field model are used, and hyperfine structure and redistribution of excited state are taken into account. Using the statistic method of laser line width in LID, the differential equations of distribution on base and excited states of lithium atom with different velocities is proposed with chaotic field approximation. ©, 2015, Chinese Optical Society. All right reserved.