Optimization Design Scheme of Oracle Database

2014 ◽  
Vol 608-609 ◽  
pp. 589-592 ◽  
Author(s):  
Shu Chun Yao
Keyword(s):  
Information Technology ◽  
Optimization Design ◽  
System Structure ◽  
Operating Mechanism ◽  
Oracle Database ◽  
Application Range ◽  
Design Scheme ◽  
Data Optimization

With the development of information technology, the system structure of Oracle database is increasingly complicated. The performance is improved, and the application range is expanded, but there are still many unstable factors. Combined with Oracle system structure, the paper expounds data optimization from many aspects including OFA free structure, rollback segment, operating mechanism, hardware and OS environment, and the paper formulates the corresponding optimization strategies.

scholarly journals Integrated Optimization Design of Combined Cooling, Heating, and Power System Coupled with Solar and Biomass Energy

Energies ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 687 ◽  
Author(s):  
Lizhi Zhang ◽  
Fan Li ◽  
Bo Sun ◽  
Chenghui Zhang
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
Optimization Design ◽  
Design Method ◽  
Renewable Energy Sources ◽  
Optimal Operation ◽  
Biomass Energy ◽  
System Structure ◽  
Energy Sources ◽  
Combined Cooling

The combined cooling, heating, and power (CCHP) systems coupled with solar energy and biomass energy can meet the needs of island or rural decentralized and small-scale integrated energy use, which have become increasingly popular in recent years. This study presents a renewable energy sources integrated combined cooling, heating, and power (RES-CCHP) system, driven by a biogas fueled internal combustion engine (ICE) and photovoltaic (PV) panels, which is different from the traditional natural gas CCHP system. Owing to the solar energy volatility and the constraint of biomass gas production, the traditional optimization design method is no longer applicable. To improve the energetic, economic and environmental performances of the system, an integrated design method with renewable energy capacity, power equipment capacity and key operating parameters as optimization variables is proposed. In addition, a case study of a small farm in Jinan, China, is conducted to verify the feasibility of the proposed RES–CCHP system structure and the corresponding optimal operation strategy. The results illustrate that the implementation of the optimal design is energy-efficient, economical and environmentally-friendly. The values of primary energy saving ratio, annual total cost saving rate and carbon emission reduction ratio are 20.94%, 11.73% and 40.79%, respectively. Finally, the influence of the volatility of renewable energy sources on the optimization method is analyzed, which shows that the RES–CCHP system and the method proposed are robust.

Sound & vibration control for a single-cylinder gasoline engine based on parameter optimization of timing-chain system

2017 ◽  
Vol 232 (13) ◽  
pp. 1815-1827
Author(s):  
Xianjun Hou ◽  
Songze Du ◽  
Chihua Lu ◽  
Zien Liu ◽  
Hao Zheng ◽  
...  
Keyword(s):  
Optimization Design ◽  
Gasoline Engine ◽  
Subjective Evaluation ◽  
Dynamic Performance ◽  
Transverse Displacement ◽  
Single Cylinder ◽  
Chain System ◽  
Design Scheme ◽  
Single Cylinder Engine ◽  
Timing System

In order to promote the idling noise quality of a single-cylinder gasoline engine, this paper addresses sound source identification and noise control research. The noise was identified by the application of subjective evaluation, acoustic spectrum and sound intensity analysis. It was found that the noise was caused by the anomalous dynamic performance of the timing system under idling conditions. Furthermore, sound and vibration characteristics of timing system were improved by design methodology research of key components. A multi-body dynamic model was established to characterize dynamic characteristics of the timing system under idling conditions. The key factor of producing noise was that the fluctuation of contact force between the chain and guide and transverse displacement of the chain were much higher than those of the allowable design limit. For the lowest design alternation and manufacturing costs, the work analyzed six timing system improvement schemes obtained by cross combination of tensioner blade line and guide strip radian parameters. After that, the optimal design scheme which could improve dynamic performance parameters of the timing system was derived. The design scheme was conducted with a acoustic test of engine to derive the following results. The noise level of a single-cylinder engine under idling conditions decreased by 3 dB(A). The abnormal noise of the original engine was eliminated under subjective evaluation. The sound quality under other working conditions had no apparent deterioration. Research shows that guide and tensioner blade line optimization design could improve dynamic performance of the timing chain system to eliminate abnormal noise, thereby significantly improving the acoustic characteristic of a single-cylinder engine.

ANSYS Finite Element Analysis of a Large Space Steel Tower Frame Optimization Design Research

2012 ◽  
Vol 538-541 ◽  
pp. 520-524
Author(s):  
Fu Long Zhao
Keyword(s):  
Finite Element ◽  
Optimization Design ◽  
Design Research ◽  
System Structure ◽  
Element Calculation ◽  
Large Space ◽  
Element Analysis ◽  
Transformer Substation ◽  
Design Requirements ◽  
Steel Weight

Based on the ANSYS finite element calculation and analysis results to do the optimization design research of a large space transformer substation steel tower．To meet the constraints in steel tower frame under the minimum steel weight as the goal, the original web members of tower system structure would be optimized which was in different web members system as contrast．The optimization of the determined web members system met the design requirements and were more reasonable in economy．

Numerical Simulation Research of Optimization Design of Supporting Half-Coal Roadway in Deep Stope Working Face

2014 ◽  
Vol 945-949 ◽  
pp. 1169-1174
Author(s):  
Xian Tao Zeng ◽  
Ning Wang ◽  
Cong Jiang ◽  
Yun Yi Zhang ◽  
Chang Hai He
Keyword(s):  
Numerical Simulation ◽  
Optimization Design ◽  
Mining Area ◽  
Support Design ◽  
Simulation Research ◽  
Actual Measurement ◽  
Design Scheme ◽  
Coal Roadway ◽  
Working Face ◽  
Ground Stress

In this paper, design of roadway with stope working face Yeqing 8459 had been optimized combined with geological characteristics of the working face based on the actual measurement of ground stress and mechanical properties of coal rock of Yangquhe mine in Feng Feng mining area. Analyzing eight kinds of roadway support design scheme through numerical simulation and evaluating the supporting effect of each supporting design scheme, designating the construction guidelines ultimately.

scholarly journals Optimization Design and Flexible Detection Method of Wall-Climbing Robot System with Multiple Sensors Integration for Magnetic Particle Testing

Sensors ◽  
2020 ◽  
Vol 20 (16) ◽  
pp. 4582 ◽  
Author(s):  
Xiaojun Zhang ◽  
Xuan Zhang ◽  
Minglu Zhang ◽  
Lingyu Sun ◽  
Manhong Li
Keyword(s):  
Optimization Design ◽  
Detection Method ◽  
Flaw Detection ◽  
Force Sensor ◽  
Operating Conditions ◽  
System Structure ◽  
Curved Surface ◽  
Climbing Robot ◽  
Detection Mechanism ◽  
Multiple Sensors

Weld detection is vital to the quality of ship construction and navigation safety, and numerous detection robots have been developed and widely applied. Focusing on the current bottleneck of robot safety, efficiency, and intelligent detection, this paper developed a wall-climbing robot that integrates multiple sensors and uses fluorescent magnetic powder for nondestructive testing. We designed a moving mechanism that can safely move on a curved surface and a serial-parallel hybrid flexible detection mechanism that incorporates a force sensor to solve the robot’s safe adsorption and a flexible detection of the curved surface to complete the flaw detection operation. We optimized the system structure and improved the overall performance of the robot by establishing a unified mechanical model for different operating conditions. Based on the collected sensor information, a multi-degree of freedom component collaborative flexible detection method with a standard detecting process was developed to complete efficient, high-quality detection. Results showed that the developed wall-climbing robot can move safely and steadily on the complex facade and can complete the flaw detection of wall welds.

The Application of Genetic Algorithm in Valve Spring Optimization Design of Internal Combustion Engine

2015 ◽  
Vol 741 ◽  
pp. 810-813
Author(s):  
Shao Ni Wang
Keyword(s):  
Genetic Algorithm ◽  
Internal Combustion Engine ◽  
Optimization Design ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Technical Problems ◽  
Intelligent Computing ◽  
Application Range ◽  
Valve Spring ◽  
Design Variables

This paper described examples of genetic algorithm in valve spring optimization design of internal combustion engine, which solve the optimal values of the design variables by constructing multi-objective function. The technical problems that complex performance can't be considered in the calculation were solved in designing the spring, the method has many advantages such as simple universal, strong robustness, and wide application range; it is an essential and critical intelligent computing technology in the future mechanical optimization design.

scholarly journals Optimization Design of a Double-Channel Pump by Means of Orthogonal Test, CFD, and Experimental Analysis

2014 ◽  
Vol 6 ◽  
pp. 545216 ◽  
Author(s):  
Binjuan Zhao ◽  
Douhua Hou ◽  
Huilong Chen ◽  
Yu Wang ◽  
Jing Qiu
Keyword(s):  
Experimental Analysis ◽  
Optimization Design ◽  
Stokes Equations ◽  
Design Method ◽  
Reference Value ◽  
Orthogonal Test ◽  
Optimized Design ◽  
Range Analysis ◽  
Design Scheme ◽  
Double Channel

A new approach to optimizing a double-channel pump was presented, based on combined use of orthogonal test, computational fluid dynamics (CFD), and experimental analysis. First, a preliminary pump was designed according to design specifications, implementing the traditional design method. Later, a standard L9 (34) orthogonal table including 9 representative design schemes was implemented to find the best parameter combination for the impeller of the pump. Reynolds averaged Navier-Stokes equations accompanied by Smith modified k-ε turbulence model were solved to obtain the inner flow fields of the pump as well as its hydraulic performance for each design scheme. The optimized design scheme was obtained after range analysis. Finally, CFD analyses and experiments were carried out to evaluate the optimized design. The results show that the characteristics of the optimized pump were obviously improved, and the simulated pump head and efficiency increased by 3.622% and 9.379%, respectively. This research not only provides an effective way to improve the hydraulic design of double-channel pumps, but also has certain reference value in multiobjectiveoptimization design of other pumps.

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