Advanced Materials Research Vols. 129-131

Abstract: Aimed at the problem that the deformation resistance can’t be measured in the cold rolling processing and it influence the precision of rolling force directly , propose the secant method to calculate the non-linear equation of deformation resistance. Solve the high-level non-linear equation with the iteration calculation, in which the deformation resistance is the independent variable, to improve the calculation precision of the deformation resistance and rolling force. It is proved that the secant method has less iterations, simpler calculation and smaller relative error, which has a vital meaning in improving the accuracy of rolling force.

Abstract: In order to improve the low speed stationary of continuous rotary electro-hydraulic servo motor and avoid the pressure impact in the sealed cavity during the oil distribution, based on fluid and solid interaction theory, this paper adopted ADINA to analyze the pressure field distribution of sealed cavity in certain radial and axial gap, the computed model of the motor was established, and the pressure change of sealed cavity under the given dimension of the buffer groove was analyzed. The result shows that the pressure changes stably and buffer groove’s dimension is reasonable, which lays foundation for the structure design and experimental research of large displacement servo motor and improve the low speed performance of continuous rotary electro-hydraulic servo motor.

Abstract: The mechanics properties of P. ussuriensis Kom lumber compressed by rollers decreases a little, the loss of which in tangential compression is more than that in radial one. The loss of mechanics strength increases with the rise of the compression rate. The Compressive strength parallel to the grain of wood is from 2.391% to－4.589%, the Shearing strength parallel to the grain is from－2.071% to－14.213%, the Tensile strength parallel to the grain is from 2.246% to－11.535%, the Tensile strength perpendicular to the grain is from－0.217% to－16.877%, the Cleavage strength of wood is from 1.785% to－16.235%, the Bending strength of wood is from 4.417% to－27.793%, the Modulus of elasticity in static bending is from 1.045% to－19.455%, and the Toughness of wood is from 3.413% to－28.929%.

Abstract: To solve the deficiency of ant colony optimization as falling into local optimal solution easily, the paper proposes a dynamic globe pheromone ant system which based on the small world network phenomenon of information exchange in ant colony system and simulates this mechanism by meanings of the wave equation of volatilization pheromone, and then constructs the particle wave function of diffuse pheromone as well as the corresponding condition shift formula. Through dynamic surveying proliferation wave information, the ant is able to effectively absorb the effective information containing in the inferior solutions during the process of seeking superior solution, and can carry on the condition shift using the globe distributed pheromone information, thus enhance the quality of solution. Taking vehicle routing problem as example, the computed result shows that compared the basis colony optimization DGPAS has higher globe search ability.

Abstract: During the past decade a new class of magnetic materials-amorphous metals, has been under development. This material offers the potential of reducing the core losses of motors dramatically due to its excellent magnetic performance. Thus, the incentive is tremendous to develop cost-competitive motors utilizing amorphous alloys. However, there were some deficiency of a relatively high brittleness and a low stacking factor, which makes it difficult to stamp or cut the material to the shapes that motors required. This paper will briefly review some of the important process technical of magnetic amorphous alloys cores and will describe the results of applying this material in all kind of test motors.

Abstract: Disaster, emergency and epidemic diseases occur often bring huge losses, these losses in large part due to the loss of emergency logistics after disaster. So how to schedule schemes within shortest time in unpredictable situations, sent emergency resources to emergency locations within the shortest time is the key. According to the principle, GERT function, moment generating function, flow chart of theory and mason formula, then, combined with examples, construct an emergency distribution model. By calculating, distribution probability of success for each line and risk probability, the distribution of time and variance were achieved, then, analyze the defects in the model and areas in which need of improvement, and finally according to the defects put forward the improved solution.

Abstract: Phosphoaluminate cement (PAC) sets quickly and develops high early strength. As a novel cementitious material, its hydration mechanism and microstructure are more complex than ordinary cement. Based on nitrogen adsorption isotherm method, investigated characteristic of adsorption isotherm of PAC paste, adsorption loop and pore distribution at different hydration period with various W/C ratio, results show that adsorption and desorption isotherm are tight relate to pore structure and pore distribution. In addition, the study analyzed the scope of application of nitrogen adsorption isotherm method on investigating pore structure of cement paste.

Abstract: Based on systematically illustrating the current research of dynamic vehicle routing problem and one-off optimization strategies, the paper takes dynamic vehicle routing problem with time window as the study object, proposed a new INTER-SQM dynamic programming strategy to optimize the traffic path of moving vehicle, which highlights the robustness of INTER-SQM strategy, the corresponding ant colony optimization is presented also. Random test compares the operating performance of various optimization strategies in different strong dynamic degrees scenario, discusses the characteristics of the INTER-SQM strategy and points out the research direction of dynamic vehicle routing problem.

Abstract: The aim of this paper is to prepare an in-situ composite of 6061 TiB2 particles using vortex method and study the chemical kinetics of the ongoing in-situ reaction by X-ray diffraction (XRD) technique. In addition, it is characterized for its mechanical and wear properties. XRD studies indicated that the reinforcement was formed only at the later stages after a prolonged stirring. The tensile strength of the composite was found to enhance by 57.58% at 6% TiB2, while hardness by 47.3% at 12 % TiB2. The composites showed decreasing volume loss with increasing TiB2 content with all the composites exhibiting lower volume loss compared to that of the base alloy. On the other hand, the volumetric wear showed a decreasing trend with increasing volume fraction of reinforcement and the sliding distance. These results are explained using scanning electron microscopy, which showed more debris on the wear track of the composite having lower amount of TiB2, while with increasing TiB2 reinforcement, the composite showed more even wear track with lower amount of debris.

Abstract: The virtual simulation laboratory supplements the traditional ones with its extension of ideas and space. Nowadays many universities offer courses related to photography, however, students are furnished with enough chances to practice owing to the lack of finance, out-mode facilities, and depreciation of the equipment resulted from the increasing number of students. To solve this, we developed the experimental platform of simulation camera with the help of Adobe’s Flash, thus lowering the rate of the equipment depreciation, increasing the teaching efficiency, economic benefit and teaching results.