This design is a temperature detection and automatic control system based on STC89S52 micro controller for the cold storage. Mainly consists of a power supply, a temperature detection circuit, a system control circuit , actuator, the temperature display circuit, alarm circuit and other parts, using DS18B20...

The angular traffic flows of the bidirectional marshalling station would greatly increase the task for its characteristic of repeated unmarshalling with subsequently affecting the productive efficiency. Therefore, how to decrease the amount of trains of angular remains an urgent problem needed to be...

In the paper ,a new approach to design discrete sliding mode guidance laws is presented based on the target-missile relative motion equation in three-dimensional space. The paper also proposes a new method to estimate the real-time target acceleration through the Extended State Observer. Finally, by...

In order to reveal the correlation between the road transportation industry and national economy in China from 1985 to 2013, the grey relational analysis method is chose to calculate the gray correlation degree between GDP as main performance index in national economy system and other four factors,such...

The RANS method and turbulence model are adopted to numerically investigate the turbulent flow and heat transfer performance of dimple/protrusion arranged in rectangular channel with the working fluid of supercritical carbon dioxide and air. Investigated is 90000. The distribution, the flow resistance...

This paper discussed an automotive collision avoidance and warning system based on millimeter-wave radar. With the theory and application research of proactive early-warning and avoidance control, we have established the avoidance control strategy and algorithm. This system can identify dangerous targets...

In this paper, the grey correlation analysis is used to analyze the influence of each industry added value on GDP of Sichuan province. The GDP, the first, second and third industry added value of Sichuan data in 2005-2012 is analyzed. The grey GM (1.1) model is used to establish a forecasting model for...

This paper is concerned with the disturbance rejection of weighted multiple-model adaptive control (WMMAC), in which the error index of weighting algorithm has been improved to filter out the influence of severe disturbance. Simulation results verified the effectiveness of the proposed scheme.

Supercritical carbon dioxide power cycle can reduce the power consumption and achieve higher system efficiency with the properties mutation phenomenon of supercritical fluids near the critical point. Turbine is the critical component of the heat-work conversion in cycle which has advantages of compact...

In order to make a better railway transportation safety system and reduce the number of railway accidents, we establish a safety status index to assess the railway transportation safety level. We calculate the risk value by classifying the safety information provided by the China Railway in accordance...

This work discusses performance analyses of a flywheel energy storage system rotor using ansys. Design of a rotor based on 3D modeling and simulation is presented, the flywheel theory is also studied. A basic static structure and modal analyzes were carried out to evaluate the performance of the model...

The pile-anchor supporting system is wildly used in the excavation supported system, and waist beams play an important role in the supported system. If the waist beam is destroyed, it may lead to the collapse of the retaining structure. But now, the designers tend to ignore the specifically designed...

Viscous damper is a kind of velocity-related damper without rigidity. It can dissipative seismic energy and also can effectively reduce vibration of the structure .In this paper, a dynamic experiment for L-shaped eccentric structure was carried out to compare and verify seismic energy dissipation effect...

In linear vibration system, it is difficult to determine the relationship between generalized coordinates and the natural frequency and to obtain the coupling relationship between generalized coordinates. Therefore, based on the MATLAB language the energy decoupling method is used to calculate the energy...

In this study, the three-dimensional stress distributions in the area surrounding indentation pattern for three different materials, Al2O3, Si3N4 and SiC were analyzed by FEM. Those theoretical results were also compared with the experimental ones by Rockwell hardness test. The effect of loading stress...

The FEM simulation of flow of extruding plastic gear during cooling and die design was studied in this paper. A capillary rheometer MLW-400 was used to measure the curve of shear rate VS viscosity of POM-500P, the Power Law constitutive equation was used to describe the POM rheological characteristics,...

Now days, Computer science and technology program is not only one of the required programs in the modern colleges and universities, but also necessary knowledge and skill that are required by the information age on talented personnel to possess. At present, seen from the teaching activities and training...

RTV is one of effective methods of power transmission equipment external insulation properties improving. However, the performance of RTV coating was affected by spraying operation, which was mainly artificial spraying on site. In this paper, automatic spraying equipment was developed to deal with the...

This paper introduces a test for the dynamic split tension of fiber concrete. The dynamic-split-tension test, which used a Hopkinson bar, was performed for plain concrete, steel fiber concrete, and polypropylene fiber concrete. Test phenomena were described and analyzed. The effects of different fiber...

Metal-assisted chemical etching (MaCE) of silicon (Si) is a well-used method for the fabrication of Si nanostructures. To simplify the control etching for the fabrication of Si 3D nanostructures, we developed a new method using direct electric field to control the etching direction. We examined the MaCE...

Research on the deformation and failure of surrounding rock is very important to the excavation of tunnel, in this paper, based on the geological data and mining conditions of a tunnel engineering using the finite element software FLAC3D to simulate the process of tunnel excavation, and the failure characteristics...

This paper introduces the principle of the excitation inrush transient calculation firstly, including the basic thoughts of simulation calculation and the basic method of numerical calculation. And then the dynamic magnetization of the transformer core is described, and the simulation of inrush current...

The finishing force acting on workpiece surface generated by magnetic cluster is an important factor which affects cutting behavior of abrasives in magnetic abrasive finishing (MAF). In this study, we measured finishing force in alternating magnetic field and direct magnetic field, respectively. Experimental...

The PECVD (Plasma Enhanced Chemical Vapor Deposition) process chamber is dynamic sealed by the Multi-layer Linkage Sealing Mechanism, which is installed in front of process boxes. The leak rate attach uniformity requirement of process gas and RF flow distribution. Meanwhile, The efficiency of aSi/uc...

For researching the influence of the width of corridor to the smoke distribution in room-corridor geometry fire, based on similar principle to build a model-entity ratio of 1:4 model experiment system, conducted three conditions of model experiment, analyzed the temperature distribution in corridor,...

The paper deals with the bending tests of new designed joints for bus skeletons. The frames of buses have to satisfy various demands, but the safety of the passengers is the priority. The actual welded joints should be replaced by new type of profiles connections in the future. Finite elements method...

The article deals with the research of the pressures originate inside the cooling system and also in the mould cavity during the injection moulding process. The reason for this research is the fact that the wear on the injection device reduces with the decreasing of pressure in the mould cavity during...

Traditional thermal nanoimprint lithography (TNIL) needs high temperature. This limits its application in the biological and medical area where substrate cannot sustain high temperature. Low temperature nanoimprint lithography (LTNIL) allows imprint conducted under temperature a little higher than transition...

This paper introduces the working process and technical parameters of drive head on CBM vehicle drill rig in detail. With structural parameters as design variables, minimum volume as objective function and parameter and checking conditions of single gear transmission axis and gear as constraint conditions,...

For the electrical transformer equipment state analysis to obtain the accurate status, and reliable maintenance strategy, to long-term safe, reliable and economic operation of the power grid is particularly important. So, it is proposed the condition evaluation method of the power transformer equipment,...

Power transmission equipment condition is fatal in the power system. Incipient fault of transformer is detected as early as possible, which can make for reducing the loss by the interruptions of temporary ceasing run and increasing the level of the run and maintenance. Thus, it is proposed the condition...

This paper presented a design using full-duplex wireless signal inversion adaptive cancellation. Signal inversion using a transmitter based on balanced / unbalanced design was simple (Balun). The new design, different from the previous work in support of broadband and high-power systems. In theory, this...

Nowadays, 3D simulation technology is widely used for training electric grid employees in term of simulating transformer substations. However, there is also the need for accident handling and simulation that transitional 3D technologies cannot be applied. This paper introduces an accident-based 3D simulation...

To development of Guilin plants and flowers tourism, Guilin tourism plants and flowers has been studied by computer. A lot of date of Guilin climatic change and tourism plants has been study by computer. It is mainly analysis of climate change effected on some main ornamental plants optimal viewing period...

Power transmission network depends on various sensors to obtain the real-time status of the network, due to the huge number of sensors and random distribution, direct access to the network will bring huge waste of bandwidth resources, and in the process of communication, the key data of the power transmission...

In the field of the power supply enterprise, it is urgent to use the mobile workflow to carry out the process management. This paper adopts low coupling and high available workflow design, which design the workflow client through the long connection and SMS with the power mobile operation state manager...

The nonlinear frequency modulation technology is applied to the fuze detection system, which makes the modulation signal in a period of a nonlinear change, so that the interference of the enemy is difficult to detect. Studies have shown that the fuze system has good speed resolution performance and the...

For the problem of fault diagnosis of aircraft oil system, a new method using CLIPS to build expert system is presented in this paper. By building Knowledge Base, Infer Engine and using CB tool, the relevant software environment is set up. Consequently the fault diagnostic system of aircraft oil system...

The firing error rule of the weapon equipment test was studied, and before and after test’s distribution density was confirmed on two conditions with prior information and without prior information. Based on this, the Bayes estimation and hypothesis inspection for the firing accuracy was given, and a...