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| 1 | New Optimization Method, the Algorithms of Changes, for Heat Exchanger Design显示文摘Heat exchangers are widely used in the process engineering such as the chemical industries,the petroleum industries,and the HVAC applications etc.An optimally designed heat exchanger cannot only help the optimization of the equipment size but also the reduction of the power consumption.In this paper,a new optimization approach called algorithms of changes (AOC) is proposed for design and optimization of the shell-tube heat exchanger.This new optimization technique is developed based on the concept of the book of changes (I Ching) which is one of the oldest Chinese classic texts.In AOC,the hexagram operations in I Ching are generalized to binary string case and an iterative process,which imitates the I Ching inference,is defined.Before applying the AOC to the heat exchanger design problem,the new optimization method is examined by the benchmark optimization problems such as the global optimization test functions and the travelling salesman problem (TSP).Based on the TSP results,the AOC is shown to be superior to the genetic algorithms (GA).The AOC is then used in the optimal design of heat exchanger.The shell inside diameter,tube outside diameter,and baffles spacing are treated as the design (or optimized) variables.The cost of the heat exchanger is arranged as the objective function.For the heat exchanger design problem,the results show that the AOC is comparable to the GA method.Both methods can find the optimal solution in a short period of time. | TAM Houkuan TAM Lapmou TAM Sikchung CHIO Chouhei GHAJAR Afshin J | 2012 | Chinese Journal of Mechanical Engineering2012，25，1： | 6 |
| 2 | A Sequential Simulation Technique for Adequacy Evaluation of Generating Systems Including Wind Energy显示文摘 | Billinton R HUA Chen Ghajar R | 1996 | IEEE Trans on Energy Conversion1996，11，4： | 1 |
| 3 | Time-series models for reliability evaluation of power systems including wind energy显示文摘 | Billinton R Chen H Ghajar R | 1996 | Microelectronics Reliability1996，36，9： | 1 |
| 4 | Time-series models for reliability evaluation of power systems including wind energy 显示文摘 | Billinton R CHEN H GHAJAR R | 1996 | Microelectronies Reliability1996，，9： | 1 |
| 5 | Semi-empirical modeling of volumetric efficiency in engines equipped with variable valve timing system显示文摘Volumetric efficiency and air charge estimation is one of the most demanding tasks in control of today's internal combustion engines.Specifically,using three-way catalytic converter involves strict control of the air/fuel ratio around the stoichiometric point and hence requires an accurate model for air charge estimation.However,high degrees of complexity and nonlinearity of the gas flow in the internal combustion engine make air charge estimation a challenging task.This is more obvious in engines with variable valve timing systems in which gas flow is more complex and depends on more functional variables.This results in models that are either quite empirical(such as look-up tables),not having interpretability and extrapolation capability,or physically based models which are not appropriate for onboard applications.Solving these problems,a novel semi-empirical model was proposed in this work which only needed engine speed,load,and valves timings for volumetric efficiency prediction.The accuracy and generalizability of the model is shown by its test on numerical and experimental data from three distinct engines.Normalized test errors are 0.0316,0.0152 and 0.24 for the three engines,respectively.Also the performance and complexity of the model were compared with neural networks as typical black box models.While the complexity of the model is less than half of the complexity of neural networks,and its computational cost is approximately 0.12 of that of neural networks and its prediction capability in the considered case studies is usually more.These results show the superiority of the proposed model over conventional black box models such as neural networks in terms of accuracy,generalizability and computational cost. | Mostafa Ghajar Amir Hasan Ka Kaee Behrooz Mashadi | 2016 | Journal of Central South University2016，23，12： | 1 |
| 6 | A novel three-dimensional model to quantify metastatic melanoma invasion 显示文摘 | Ghajar CM Suresh V Peyton SR | 2007 | Mol Cancer Ther2007，6，2： | 1 |
| 7 | Comparison of void frac- tion correlations for different flow patterns in horizon- tal and upward inclined pipes显示文摘 | Woldesemaya~ M A Ghajar A J | 2007 | International Journal of Multiphase Flow2007，33，4： | 1 |
| 8 | Economic costs of power inter- ruptions: a consistent model and methodology 显示文摘 | Ghajar R Billinton R | 2006 | Electrical Power and Energy Systems2006，28，1： | 1 |
| 9 | Early indicators of prognosis in severe traumatic brain injury 显示文摘 | Chesnut RM Ghajar J Mass A1 | 2006 | J Neurotrauma2006，17，67： | 1 |
| 10 | Comparison of void fraction correlations for different flow patterns in horizon- tal and upward inclined pipes显示文摘 | Woldesemaya~ M A Ghajar A J | 2007 | International Journal of Multiphase Flow2007，33，4： | 1 |
| 11 | Tine-series models for reliability evalution of power systems including wind energy 显示文摘 | Billinton R Chen H Ghajar R | 1996 | Microelectron Reliab1996，36，9： | 1 |
| 12 | A flow pattern independent drit flux model based void fraction correlation for a wide range of gas-liquid two phase flow显示文摘 | Bhagwat S M Ghajar A J | 2014 | International Journal of Multiphase Flow2014，59，2： | 1 |
| 13 | Traumatic brain injury 显示文摘 | Ghajar J | 2000 | Lancet2000，，356： | 1 |
| 14 | Mesenchymal stem cells enhance angiogenesis in mechanically viable prevascularized tissues via early matrix metalloproteinase upregulation 显示文摘 | Ghajar CM Blevins KS Huqhes CC | 2006 | Tissue Eng2006，12，： | 1 |
| 15 | Traumatic brain injury显示文摘 | Ghajar J | 2000 | Lancet2000，356，9： | 1 |
| 16 | Turbulent mixing correlation -s for a thermocline thermal storage tank显示文摘 | Y H Zurigat P R Liche A J Ghajar | | 0，，263： | 1 |
| 17 | Tumor engineering: the other face of tissue engineering显示文摘 | Ghajar C M Bissell M J | 2010 | Tissue Engineering Part A2010，12，7： | 1 |
| 18 | Time-series models for reliability evaluation of power systems including wind energy显示文摘 | Billinton R Chen H Ghajar R | 1996 | Microelectronics and Reliability1996，36，9： | 1 |
| 19 | Traumatic brain injury 显示文摘 | Ghajar J | 2000 | Lancet2000，356，9233： | 1 |
| 20 | Response anticipation and re- sponse conflict: an event-related potential and functional mag- netic resonance imaging study 显示文摘 | Fan J Kolster R Ghajar J | 2007 | J Neurosci2007，27，9： | 1 |
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