First we establish the definition of J-System, and by some actual case according to this definition to illustrate that many scientific knowledge system are J-System which is consist of three concept sets by some cognitive pattern. This paper discusses that the J system is composed of the paradigm set...

In order to clarify the failure characteristics and influencing factors of overlying soil during vertical jacking, using secondary development of discrete element program to simulate the construction process of vertical jacking, which reveals the failure mechanism, scope and development path of the overlying...

The new reform of college entrance examination has given students the right to choose subjects freely, but it puts forward higher requirements for school resources. This paper establishes the course scheduling optimization model to give the optimal courses arrangement which can help schools use their...

Domestically, virtually very little has been done in this area in the printing and dyeing production process scheduling, while some work using dispatch rule for modeling and solution is reported abroad. In this paper, a mathematical model is presented to describe the printing & dyeing production process...

The molecular model of PVDF is established by the calculation method of density functional theory(DFT). A process of applying an electric field of different magnitude to PVDF to cause a phase transition was simulated. The transformation of the molecular chain of PVDF molecules under the electric field...

The catapulting device is widely used in the aerospace field. In the process of simulated impact test of a certain type of missile, a design method of the pulley group ejection device is proposed for the test system with large load mass, large impact speed and short acceleration time, which elaborates...

In order to effectively predict high-risk students, this paper proposed a weighted voting combination prediction model based on Hadoop for high-risk students. Firstly, the design idea of the model was given, and the data of students were stored and processed by Hadoop platform. Secondly, according to...

For the problem which the subjectivity of confirming weight is too strong and depending on accurate data in VIKOR, we propose a method of ballistic missile threat assessment based on improved VIKOR. In our method, VIKOR is improved at two aspects. On the one hand, the algorithm of confirming weith is...

Considering the image distortion and the masking effect of human visual system, the Just Noticeable Distortion (JND) model is used to construct the model based on the Sigmoid function, using the Just Noticeable Distortion threshold and the absolute value of the pixel change of the image to correct the...

Based on the autoregressive distribution lag model, this paper studies the short-term power load forecasting problem in a certain area of Ningbo in summer. Firstly, the characteristics of time periodicity and temperature sensitivity of power load are analyzed. Secondly, on the basis of this analysis,...

In this paper, the two-dimensional water mathematical model of the Pearl River Estuary is established. Based on the verification of the hydrological data, the tidal current characteristics of the prefabricated immersed pipe pouring area and the floating channel are simulated, and the characteristics...

Suspension is an important part of the automobile, it is the vehicle ride comfort and control stability and other performance which have a great impact. Therefore, suspension design has always been one of the concerns of automobile designers. In this paper, suspension system mathematic model was built...

The casing of underground gas storage is under complex stress conditions because of the injection-production alternating loads and the influence coming from the intensive injection and withdrawal of injection-production wells. It is crucial for the long-term safety of injection-production wells of underground...

Aiming at the problem of pressure fluctuation in front of injector of a certain type of marine steam power plant fuel system caused by working condition change, a system optimization method is proposed, which combines the star-delta connection method of electric motor with the main pressure feedforward...

User logon failure accounted for a relatively large proportion in network fault. Therefore, it is of great significance for service providers to diagnose and locate login failures quickly. In this paper, a login fault diagnosis method based on bayesian network is proposed. Firstly the login fault events...

In order to prevent the leakage of the electromagnetic field and control the electromagnetic field within the limit of the safety limit, the electromagnetic shielding device will be installed in the coupling mechanism of the wireless power energy transmission system. The edge effect will be produced...

As an important way to absorb clean energy, micro-grid is studied in this paper. Compared with photovoltaic or wind independent power supply system, wind-solar complementary system can better adapt to the change of environment. Coupled with the regulating function of battery, wind, solar and battery...

The fuel injector of marine auxiliary boiler burner was took as the research object in this paper. Firstly the UG NX_8.5 software was used to establish the 3D model of the boiler injector and related components, then the virtual assembly and disassembly system of the boiler injector was researched and...

As a new generation of light source, the organic light-emitting diode (OLED) has many advantages, and Apple has adopted OLEDs display on the latest version of mobile phones. However the low light output rate is an important factor restricting its performance. In this paper, FDTD solutions software is...