In this paper, first, based on the principle of sensitivity analysis, the key combustion control parameters that influence the combustion characteristics index indicated mean effective pressure (IMEP)and crank angle of 50% heat release (CA50) of diesel low temperature combustion(LTC)are determined by...

As a province with rich resources, Jiangxi Province has many metallurgical enterprises. However, most of Jiangxi metallurgical enterprises' production pattern are not environmentally friendly. The government urgently needs to formulate policies to reduce pollution. This paper uses the method of system...

To make sure the major factors and their influence for pulverized coal plasma ignition(PCPI), the way predicting the PCPI was investigated in this paper. The back propagation(BP) neural network was used to established a prediction model which can study by itself for PCPI. Then the sample database was...

Freak wave is a kind of instantaneous disastrous wave with large wave height, which has great destructive effect on the navigation of ships at sea. Based on the Boussinesq equation, a phase-focusing model for focusing simulation of freak wave is established, and the numerical generation of freak wave...

This paper presents an improved adaptive backstepping control method based on uncertain parameters of ship model to design the ship course controller. The K-class function is introduced into every step of the virtual function design to ensure the stability of the closed-loop system and accelerate the...

In order to greatly reduce the operation frequency of actual equipment, shorten the training cycle, and improve the effect and credibility of equipment maintenance training. This system selected a type of engineering equipment as a research object. On the basis of the systematic analysis of this type...

In order to study the influence of the density distribution of the liner on the jet velocity gradient and the penetration performance, two numerical models of the typical density distribution of the powder liner were established. One is the uneven distribution of the axial density of the powder liner,...

This paper used DEA model to evaluate the operating efficiency of sample enterprises, and analyzed the influencing factors of business efficiency through Tobit regression. The results of DEA evaluation show that the operating efficiency of the listed agricultural enterprises is low and the difference...

In order to solve some defects of single deep neural network in Chinese entity Relationship Extraction task, a hybrid neural network entity relationship extraction model is designed and implemented in this paper. The model combines convolution network and bidirectional GRU model with a unified architecture,...

In high voltage grade power networks, people usually use capacitive voltage transformers (CVT) to measure the harmonic voltage, but the results exist errors. This paper studied the basic structure of CVT, established the equivalent circuit model of CVT, and proposed a method to calculate the harmonic...

In this paper, a three-dimensional temperature field simulation model of metal surface irradiated by laser is established to analyze the temperature field distribution of Q235 metal plate irradiated by laser beam. The difference of temperature history and temperature field between Gauss fundamental mode...

It is meaningful to investigate the road roughness model and simulation approach for modern vehicle suspension design and development. Mathematical modeling of the road roughness was systematically carried out in this study, which includes modeling the Power Spectral Density (PSD) of road roughness in...

A linear active disturbance rejection control compound Kalman filter (LADRC-KALM) control method was proposed aiming to three-motor synchronous system in this paper. The system was controlled by the use of ADRC’s strong anti-interference ability and decoupling performance. The observation results of...

With the rapid development of the Internet, a new business model emerged as the times require, that is, online car appointment. The Internet platform acts as a transaction intermediary to match passengers and drivers reasonably, which saves time cost and achieves decision-making autonomy to a great extent....

Stimulated Reservoir Volume (SRV) is one of new emerging hydraulic fracturing techniques to develop shale gas, tight sandstone and other unconventional reservoirs. The favorable geological conditions and reasonable fracturing design are critical factors to form complex fracture network that is different...

Airport passenger throughput prediction is of great significance to the operation and development of the airport. Based on the grey prediction method, this paper studies the future passenger throughput of the Capital International Airport and the Beijing New Airport. In this paper, the traditional grey...

How to evaluate and identify the potential default risk of the borrower before issuing the loan is the basis and important link of the credit risk management of modern financial institutions. Based on the data provided by an auto finance institution, This paper mainly studies how to analyze the historical...

Analysis of the motion state of the free-standing equipment under blast shock and vibration has important guiding significance for the safety of the equipment. In this paper, the model of shaking motion of the free-standing equipment under blast shock was established, and the governing equations of shaking...

Owing to the limitations of overall capacity and scattered allocations against marine environment, archipelago is always regarded as the typical area of high-level conflicts between human settlement and regional sustainability. The paper tries to apply the coupling and coordination model to clarify the...

This paper proposed a method to forecast the short-term passenger flow, which is a vital component of urban rail transit system. We used a hybrid EMD-LSTM prediction model which combines empirical mode decomposition (EMD) and long short-term memory (LSTM) to forecast the short-term passenger flow in...

Digital signal processing techniques are widely used in complex electromagnetic environment. In this paper, digital filtering techniques in PMR are studied to reduce the influence of high frequency interference, noise and burrs on angle measurement. Firstly, the digital filter for PMR is designed instead...

Based on the structural equation model and the characteristics of University Of Science and Technology Beijing(USTB), a graduate satisfaction evaluation model is constructed by using PLS estimation algorithm, and the fitting degree of the model is tested. It is found that the perceived quality has a...

In this paper, the hyperchaotic system in the same structure with unknown parameters are anti-synchronized using the active control technique. The designed controller ensures the full anti-synchronization between the drive and the response systems in state variables and the update rule of the unknown...

In this article, we present the results of automatic extraction of speech articulator contours from Magnetic Resonance Imaging movie by employing the Active Appearance Model. An Active Appearance Model based framework is proposed to deal with the high nonlinear property of articulatory deformation during...

This Paper discusses a kind of needling machine producing felt jacket with small diameter. The structural design and optimization of assembly and disassembly components and supporting bed will lead to quality improvement of felt jacket produced through reducing the bed’s bending deformation. As the critical...

MOOC (Massive open online courses) is developing rapidly, but the pass rate of the course is very low. It is significant to study the characteristics of learners who have obtained certificates. This article analyzes the video and completion behavior of various learners. The results show that the learner...

In dealing with emergencies, strong noise can effectively disperse the unruly crowd gathered illegally. Matlab was used to select different ultrasonic frequencies and individual transducer diameters, respectively, to carry out directional simulation of noise propagation, comparative analysis, to determine...

As/RS (Automated Storage and Retrieval System) is an important part of modern logistics System, which is widely used in various industries. At present, it has become one of the signs of enterprise production and management informatization. In this paper, the method of software simulation aided design...

In order to study the deformation mechanism of the friction pair of electronic limited slip differential, a coupled thermal-structural mathematical model of the friction pair is established. The temperature and stress field distribution of the friction pair are obtained by finite element method. This...

Quantum computing is a novelty type of calculation mode that follows the rules of quantum mechanics regulating quantum information units. The general theoretical model of a quantum computer is a universal Turing machine that is reinterpreted by using the laws of quantum mechanics. Quantum computing can...

We design a novel sensor for weak transient electromagnetic pulse fields by using a non-Foster circuit to achieve negative impedance for low VSWR. The sensor consists of an asymptotic cone dipole, connected by the non-Foster circuit to achieve low VSWR from 700MHz to 2300MHz. The sensor is good for measuring...

A method of solving the Bagley-Torvik equation with time delay has been presented in this article, which is based on the physical meaning of that equation and thus avoid the history dependence of it. The most important thing is that the fractional term of the Bagley-Torvik equation is transformed into...

It is a key technology to select the optimal spatial resolution of the remote sensing imagery to achieve the accuracy of map scale in the process of drawing satellite remote sensing maps. In this paper, through investigating the relationship between pixel size, the minimum unit on the map, the image...

An unmanned surface vessel (USV) platform that could realize the ship course-keeping [1] experiment is proposed in this paper. Integrated the high-precision Global Positioning System (GPS) into the USV platform, the high accuracy position and USV dynamics data could be obtained. Then a steering controller...

The operational test of weapon and equipment involves many factors and has complex interrelationships, so it can be regarded as a complex system and be studied by complexity theory and method. First of all, the complexity of operational test is analyzed on the basis of the concept of operational test....

According to the status quo of a reservoir dam, relevant hydraulic calculations and structural calculations are carried out on the dam body and its ancillary buildings, which reveal that the dam body was not up to standard for flood control, the left abutment of the dam body was leaking, sliding resistance...

The classical two-dimensional airfoil flutter equations can be established by many ways. For the simplicity of solving it, a sinusoidal structure motion hypothesis and some kind of aerodynamic theory must be proposed in advance. However, when a wing flutter occurs, its structural movement is likely to...

The transportation is the movement of people, animals and goods from one place to another. Nowadays it includes several modes: air, rail, road, water and other modes. In mathematically, the transportation theory is to optimize transportation and allocation of results. In reality, the problem is more...

One circulating fluidized bed boiler (CFB) generator set of a thermal power plant in Inner Mongolia power grid planned to put into automatic power generation control (AGC) by transforming the software and hardware of the unit. This can reduce the electricity allocation and punishment by the power grid....

After the spur dike is laid in the curved channel, the water flow characteristics are significantly different with the angle of the installation. To explore this problem, by using MIKE3 FM within 60°bend channel model of single spur dike to choose different angle to the three-dimensional numerical simulation...

In order to make full use of the advantage of fuzzy set theory in discretizing continuous variables and reduce the uncertainty brought by traditional static Bayesian network, this paper applies the method of fuzzy dynamic Bayesian network to reasoning learning of battlefield target tactical intention...

A novel sliding cable element that takes friction into account is presented to solve the analysis problem, such as the slider reefing parachute systems, the suspended cable systems and the space net systems. According to the force analysis of the slider point, a formulation is obtained, which aims to...

Through the application of S7-300, HIM touch screen, DP/AS-i, ET200M, configuration programming, and screen design through the control of the production line, the sensor counts the empty bottle, the full bottle, whether the raw materials are sufficient, and whether the processing is sufficient Qualified,...

The pulse sequence frequency is an important control parameter of shake-out machine. Traditionally, the selection is done by trial and error. This method is low in efficiency, wastes energy in repeated impact tests, and the selected pulse frequency reliability is low, so it often fails to get good shake-out...

The relationship between the surface cracks and the internal fractures of a Slope based on fracture degree is proposed. Fracture degree of a slope is defined as the ratio of the current crack number to the catastrophic crack number. The relationship between surface crack and internal fracture state is...

According to OIML R111, for determining the conventional mass, there are two methods: the subdivision, and the direct comparison. Comparing with the direct comparison method, the functional relationship in the subdivision/multiplication method is very complicated. Thirteen calculation equations are used...

This paper introduces a new approach to unit selection and unit concatenation, in which Chinese character is the smallest unit in speech corpus and at concatenation stage, speech segments are not only concatenated in phase, but also in amplitude. A conventional hybrid system is used in this paper. Firstly,...

Surface defects of cathode filaments of microwave magnetron would cause magnetron failure and scrapped microwave systems. Therefore, surface defects on cathode filaments must be carefully inspected. Conventionally, filaments are manually and visually inspected using their amplified images under an optical...

In order to improve the efficiency of coal mine locomotive locomotive dispatching and avert locomotive collision and clogging, a time-dependent petri net model was established according to the characteristics of underground locomotive dispatching. And the concepts of deadlock state and potential deadlock...

More and more attentions have been paid to the problem of the shear failure in the conventional straight rockbolt support for underground excavations. Different bolting innovations have been tried over the years. The bent rockbolt with promise is a new mean of rock support. Through numerical simulation...

Background: To understand the occurrence trend of earthquake casualties and identify key risk factors. Methods: We constructed a dynamic estimation model to analyze and simulate the occurrence of casualties after earthquakes and to predict the influence of earthquake magnitude and rescue team arrival...

This article presents an investigation on the flow characteristics of the air in complex probe. The flow fields around the complex probe in different Mach numbers is simulated to analysis the relation between flow field structure and text parameters. The investigation on complex probe shows that the...

Discrimination of mine water inrush source has always been the focus of academic circles. In order to do a good job in mine water inrush prevention and control, it is necessary to find out the source of mine water inrush. Combining with the relevant research results in recent years, this paper focuses...

Mine discharge refers to the total amount of surface water, fissure water, old kiln water and karst water inflow into the mine roadway. It is an important indicator in the process of coal mine production safety, and also the focus of scholars' attention. Based on a large number of previous research results,...

This article is based on the design of the IT service platform system construction project undertaken by Shanghai Zhenhua Heavy Industry (Group) Co., Ltd. It is to standardize the IT operation and maintenance work flow of the “LiangHua” Department, clearly define the functions of the Ministry of Chemical...

In order to study the temperature field (TF) distribution and material flow (MF) in the friction stir welding process, the finite element model of friction stir welding (FSW) was established to simulate the welding process. The temperature field results showed that the temperature on the advancing side...

Lithium-ion (Li-on) battery state of charge (SOC) estimation is important for electric vehicles (EVs). To eliminate the effects of colored noise on SOC estimation, a new estimation method that based on Unscented Kalman Filter (UKF) Algorithm is proposed for high-power Li-ion batteries. First of all,...

The coal feeder system is a part of coal conveying system of thermal power plant, which is mainly used for supplying coal to the boiler. During the operation of the coal feeder control system, the coal feeding rate is controlled according to the set value and the feedback information from the system,...

According to the forming characteristics of FDM process in the Additive manufacturing, an algorithm for automatic generation of thin plate structure support based on the slice projection method is proposed. For the closed surface model (such as STL model, NURBS model), the algorithm uses slice projection...

As the growing amount of data stored on the Internet, the work of searching for information becomes complicated. The traditional collection method cannot achieve a certain effect, it is cumbersome and time-consuming. Using natural language processing technology and web crawler technology to collect and...

The core idea of comprehensive positioning, navigation and time (PNT) is the technique that uses all the available resources to provide PNT services in the whole area, including inside and outside door, air, space, under water and underground, which does not solely on the GNSS. The definition and basic...

Fatigue analysis of a railway vehicle axle-box hydraulic damper was carried out in this study. The damping force profiles under nominal and actual in-service load conditions were simulated, and the corresponding load spectra were obtained using the rain-flow cycle counting approach. Further fatigue analyses...

In order to assess and appraise the electromagnetic environment adaptability of informationized weapon, some ideas about the construction requirements of complex electromagnetic environment of shooting range are proposed in this paper. Starting from the two general standards in the field of electromagnetic...

During the execution of flight schedule, the capacity of airport and airspace is often reduced by external dynamic factors such as weather conditions and flow control, which makes it impossible to meet the flow demand of airport and airspace, resulting in flight delay. In order to better implement tactical...

In short-term traffic volume clustering, one important issue is the representation of traffic profiles. This article focuses on how the LOESS smoothing technique enhances the clustering effect and what the best value of parameter span of LOESS is. This article used K-Means clustering algorithm and compared...

A discussion about image pattern recognition for Tradition Chinese Medicine (TCM) materials was explained in this paper. 150 images of each category of TCM materials were gathered, in total of five categories. 80% of the images were distributed as training samples randomly and the other 20% were used...

A gaussian naive bayesian data classification model based on clustering algorithm was proposed for fast recognition and classification of unknown continuous data containing a large number of non-priori knowledge. Firstly, the unknown data were extracted from the representative samples according to the...

In deep space exploration missions, one of the main methods used to achieve accurate landing of small celestial body by detectors is the terrain-matching navigation method based on optical images. Image matching technology is the key technology of this method. This paper proposed a small celestial image...

In this paper, we propose a special course scheduling problem with class combination. By dismantling the restrictions of given classes, students with similar foundations are reorganized into new classes. It helps to improve the efficiency of the class and the acceptance of students. However, it is difficult...

It is significant to inspect whether the vacuum degree of food container meets the standard. This paper proposes to treat it as a one-class classification problem. And for this, we present a one-class classification algorithm based on semi-non-negative matrix factorization: the classifier only needs...

We used the DEA cross-efficiency method to explore the health effects of provincial differences in dietary patterns in China. The result showed that for the group aged 0-14, Inner Mongolia and Guizhou provinces rank the top, and children in Zhejiang province should add more dairy products and eggs in...

This paper aims to expose the current management situation of Chinese seafarer intermediary companies, such as "black intermediary". To speed up the standardization of Chinese seafarer intermediary organizations to make contributions. Through extensive reading of relevant literature and research, data...

Eu3+-doped CaZrSi2O7 phosphors with promising luminescent properties have been successfully prepared through microwave heating. The crystallinity and luminescent performance were characterized by powder X-ray diffraction pattern, photoluminescence spectra, respectively. The results show that the obtained...

The exquisite appearance of concrete components not only reflects the management level of construction units and the overall quality of operators, but also transmits the reliability of the inherent quality of the whole project and the aesthetic feeling of art.. The new demoulding agent prepared in this...