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Describing the electron-electron interaction contribution to the Helmholtz free energy, we obtained a new fitting formula by revising the electronic exchange contribution to the Helmholtz free energy of the previous fitting formula. Using Fortran program, we calculated the curves with some sensitive parameters like the electron-electron interaction contribution to the free energy and the Coulomb coupling parameter , temperature , the mean distance between the electrons making a comparison between the revised fitting formula and the formers. It is concluded that the theoretical value of the revised fitting formula basically has agreement with the previous theoretical value at , when , the revised value completely has a consistent with the previous results. It is illustrated that the curve of the revised fitting formula is more smooth, perfect, and we obtained a very good agreement between the theoretical result of the revised Helmholtz free energy and the theoretical result of the former Padé formulas, which illustrates us to get a more accurate fitting formula and result. Therefore, the revised fitting formula is a more complete and accurate description of the thermodynamic properties of the electron-electron interaction contribution to the Helmholtz free energy.

Elastic modulus of a coating is an important property for design and use of the coating. At present, many methods have been put forward to evaluate the coating elastic modulus. However, each methods has special property, which make the elastic moduli from them are different. In the study, elastic modulus of a porous Ti coating has been evaluated by three-point bending test and indentation method. The results show that the coating elastic moduli from the two different methods agree well, which can reflect the uniformity of the pore structures of the porous coating. Meanwhile, the little deviations among the different test points of indentation method could reflect the uniformity of the coating structure partly.

In this paper, the development and basic theory of co-rotational finite element method is introduced. The framework of constructing nonlinear element with co-rotational finite element method is proposed. Based on this framework, linear shell and beam element is easy to be extended to nonlinear problem analysis

A dynamic characteristics test and analysis system for CNC machine tool is developed based on C++/Qt platform and NI-DAQmx data acquisition driver. The function modules include hammer experiment, signal continuous acquisition, spectral analysis, frequency response function analysis and signal coherence analysis, etc. The analysis results provide the basis of dynamics characteristics simulation and cutting parameters optimization. The system can be also used to analysis the vibration of the cutting process. Spectrum analysis modules help to assess the cutting stability and diagnose problems. Experiments show that the system has good accuracy and efficiency while the size and price are decreased compare with traditional equipment.

Collection of selected, peer reviewed papers from the 2013 International Conference on Advanced Materials & Sports Equipment Design (AMSED 2013), September 21-23, 2013, Singapore.
Volume is indexed by Thomson Reuters CPCI-S (WoS).
The 73 papers are grouped as follows:
Chapter 1: Materials and Their Application;
Chapter 2: Biochemistry and Medicine;
Chapter 3: Engineering Research;
Chapter 4: Development of Sport Equipment;
Chapter 5: Computer Technology in Sports;
Chapter 6: Applied Research in Sport.

In this paper the clamping forces of the HSK-E50 toolholder-spindle interface was first analysed and found the FEM analysis model. Then calculated the stress distribution of toolholder-spindle interface respectively effects by the spindle speed, interference and pull in force and finally find out how this three factors influence the connection characteristics of HSK-E50. The research results provide the designer a theoretical basis for designing and applying HSK tool system of the high speed spindle.

In order to get an economical and high-efficiency corrosion inhibitor, in this paper the weight loss method were used to investigate the corrosion inhibition rate of the combined inhibitor. The thiourea, urotropine and Cetyltrimethyl Ammonium Bromide (CTAB) were combined each other. The results showed that double combined and triple combined inhibitor all had a high corrosion inhibition rate. Especially the thiourea combined with urotropine, whose concentration were 0.02 g/L and 0.08 g/L respectively, had a lowest cost and the corrosion inhibition rate was 91.22%.

In order to reduce sinking after subgrade construction, impact compaction technology was put forward. The engineering characteristics of Yellow River sandy soil located in Kaifeng, and impact compaction technologies were analyzed. The contrast tests were also carried through, including vibration compaction and impact one. The results show that the subgrade can obtain higher compaction degree with impact compaction technology than the other method, with 2%-5% increasing.

Combining RFID and LBS technology, this paper discusses a survey conducted for developing a Car Locator system which can provide help to users to quickly find their vehicles in a large parking lot, and the system architecture and a prototype is developed from the survey results.

A PID temperature control system was designed with the LabVIEW graphical programming language and the PID toolkit. Data collection, PID control, data record and data check were experimented to a practicable instrument with the purchased programming power supply and data collection record system. The hardware and software of the computer with the virtual instrument system was proofed to be practical and the smooth control of the system temperature with the accuracy of 1 was available.