Applied Mechanics and Materials Vols. 121-126

Abstract: The terrain in the virtual realistic environment will determine the scene generation level of realism. It has been a hot topic in computer graphics. In this paper, the analysis of the current generation of multi-terrain texture mapping method is carried out firstly. At the same time, the advantage and disadvantage of the method is pointed out. A new means is put forward. It is that while the gray images are proposed to provide terrain height field constraints, the image intensity information generated by the random noise is used as constraints to determine the random distribution information on different texture of terrain. At last, a realistic terrain using OpenGL Library Standard in Win32 console application is developed which is close to the natural environment with a high application value.

Abstract: This article analyzes the current phenomena of enterprise culture construction, and it points out the existing shortcomings as well as its reasons. In consideration of the current condition of petroleum enterprise, it puts forward several suggestions. This article also has an important reference value to the current efficient construction of petroleum enterprise culture As is known to us all, oil is one of the most important energy at present, and the petroleum enterprise has a pivotal position in our country's economic field. Enterprise culture research is booming now, but its theoretical summary is still very weak. Although there have been many papers study on the petroleum enterprise culture, the research has still found some worried phenomena, such as, the overall number is less , the study is insufficient, and the contemporary condition of petroleum enterprise culture is not good enough. This article aims to find out proper ways to promote the construction of petroleum enterprise culture.

Abstract: This paper analyzed the current state of logistics personnel and logistics requirements by analyzing a number of shortcomings in personnel training. Then, the paper discussed the necessity of introducing the logistics experimental teaching in the common logistics professional training to achieve effective education of logistics professional teaching. Finally, some important conditions and necessary implementation processes are listed out.

Abstract: Acceleration sensors array can effectively measure 6-DOF high-frequency vibration parameters of many dimensions linear vibration and angular vibration. In engineering, single axis sensors introduce several errors. They also require more space to fix in and increase the computational complexity. The new scheme applying 3-axis acceleration sensors instead of single axis sensors can solve the problem above with effect. Simultaneously, the feasibility of the scheme was verified by principle derivation and model simulation.

Abstract: A vibration simulation model of a dust-cast device for imitating the different environments has been established, and ADAMS has been used for analyzing the performance parameters. Through the analysis of the simulation results, the device has been designed, and the position of loading was optimized.

Abstract: According to the performance and features of AT89C55WD and CAN bus, a nod design method of alarming system for coal gas based on AT89C55WD and CAN bus is proposed in this paper. The hardware structure and the design process of software are discussed in detail. The hardware system consists of microprocessor AT89C55WD, CAN controller SJA1000 and CAN transceiver PCA82C250. Under the support of corresponding software, the gas density, temperature and humidity can be effectively monitored by this alarming system.

Abstract: High-power light emitting diode (LED) develops greatly owing to its energy efficiency, light mono-direction and long operating life. But it is critical to have a secondary optics design for the LED street light, for obtaining good output efficiency and light distribution pattern. This article introduces many advantages of LED as street lightings source, and also analyzes the status and features of LED lamps’ application as street lightings. This article mainly designs a secondary optical light distribution implement using Lighttools 7.1. This paper also gives an example of one kind of freeform surfaces lens which can realize rectangular light shape.

Abstract: Some functional azobenzene derivatives with aromatic substituted groups have been synthesized and their photoisomerization have also been investigated. It has been found that depending on different substituted groups, such as phenyl or naphthyl segments, the formed azobenzene derivatives showed different properties, indicating distinct regulation of molecular skeletons. Spectral data confirmed commonly the characteristic absorption of substituted groups and aromatic segments in molecular structures. In addition, the photoisomerization of all compounds in solution can show trans-to-cis photoisomerization by UV light irradiation, and demonstrate distinct isomerization ratio depending on effect of different substituted headgroups. The difference is mainly attributed to the aromatic substituted headgroups and methyl group in molecular structure. The present results have showed that the special properties of azobenzene derivatives could be effectively turned by modifying molecular structures of objective compounds with proper substituted groups, which show potential application in sensor and functional material field.

Abstract: A preliminary study of optimal designing the curvilinear tapered coat-hanger die is conducted by the method of evolution strategy combined with the finite element method. The design parameters are searched according to the evolution strategy and the objective function is achieved by the three-dimensional finite element method. Design results are attractive in very low coefficient of variation of polymer flow velocity at the die outlet. It shows that the provided method is feasible and effective in the design of the curvilinear tapered coat-hanger die. However, For the purpose of decreasing the coefficient of variation value further, both the curve equation and the tapered equation of the manifolds should be considered.

Abstract: The optimization for petroleum high pressure wellhead gate valve stem is significant. Valve stem load calculation method is developed, and petroleum high pressure wellhead gate valve stem optimization model based on MATLAB is established, taking 2 9/16 inch 35MPa wellhead gate valve for an example, the stem weight decreases by 27%, consequently decreasing valve weight.