Indentation-flattening compound deformation technology (IFCDT) is defined, and the characteristics and stress-strain state of IFCDT are analyzed. The mechanism of grain refinement and texture weakened of AZ31 magnesium alloy sheet which deformed by IFCDT is analyzed. The influence law of parameters of...

A large amount of haze in the fire scene greatly affects the survey on the scene for fire fighters. The intelligent fire control can greatly improve the fire rescue efficiency and reduce the casualty rate. In this paper, an algorithm based on the hardware conditions of the intelligent fire helmet platform...

In view of the backward lighting control methods in many domestic railway stations,an automatic lighting control scheme using industrial PC as control core and wireless sensor network to collect illuminance information for feedback control is proposed.The wireless sensor network is designed to achieve...

The rapid development of science and technology has provided more efficient ways for the intelligent industrial control management. As one of the popular control systems, PLC control system plays an important role in determining the control of whole power supply system. The stability of power supply...

Obtaining useful information from massive data and then feeding useful information back to users, which has become a new trend in the development of library information service in the big data era. University libraries must meet the development trend of big data, integrate information resources of library...

With the development of communications equipment network and computer science, new generation of mobile end-user has higher requirements for the functionality and performance of mobile devices. Because Android intelligent platform occupies the first place in market share with its inherent advantages,...

In view of the fact that the fault of railway signal equipment is difficult to diagnose, this paper designs an expert system to simulate human experts to make decisions and improve the science of fault diagnosis. The design includes four aspects: First, a system structure composed of a database, a knowledge...

In this paper, the vector equilibrium problem in topological vecror spaces is discussed. By using the well-known Ky Fan section theorem, its existence theorems of solution are proved and the main results of reference [3][4] are generalized.

By applying the theory of inequality on time scales and the Lyapunov function method, we obtain some sufficient conditions which guarantee the permanence and existence of a unique uniformly asymptotically stable almost periodic sequence solution of a Lotka-Volterra system with feedback controls.

In this thesis, cationic monomer-grafted wood was prepared by using hard-wood chips with channels that can be used for wastewater treatment. The cationic modified hardwood has the ability to adsorb anionic dye wastewater. The cationic modified wood was used for the adsorption of dye wastes. The paper...

The new media, represented by the internet and the mobile Internet, has been showing strong growth in recent years. It has a wide range of influence and has caused great changes in all aspects of social life. In the new media environment, the vigorous development of the cultural and communication industry...

Stock price index prediction is an important part of stock investment. Due to the highly nonlinear and highly noisy features of the volatility of stock market, it is extremely difficult to predict stock price trend. In this paper, we use machine learning method to give stock price index prediction model...

In recent years, machine translation has made outstanding achievements, but there are also the problems such as fuzzy rules, insufficient data and improper order in the machine translation practice, which makes it still unsatisfactory. Machine learning can abstract learning features, and establish complex...

The physical model of a tracked tank cleaning robot that working on the sludge ground is set up, it provides a theoretical basis for optimizing the chassis design of the tank cleaning robot. In the modelling process, the sludge resistance of the track and the ground friction are taken into account, and...

Indoor environmental quality (IEQ) is very important to people's health, and the leakage of natural gas and chemical gas in the application seriously affects the IEQ and threatens human life and property safety. Aiming at the potential safety hazard caused by flammable gas leakage, a real-time monitoring...

According to the time-varying and nonlinear characteristics of rod-less pumping system with water as power, a fault identification method was put forward based on BP neural network. Through studying fault mechanism and vibration signal characteristics on pumping unit, the time and frequency domain feature...

The seed metering device is the core working part of the precision seed drill, and its seeding performance directly decides the precision sowing machines. The seed-discharging mechanism and seeding performance of the adjustable nest-type seed metering device are studied, and optimal working parameters...

By analyzing the working environment and mode of manipulator, the structure of manipulator was designed, which has four shafts, the upper and lower shaft, the shaft of rotation, the telescopic shaft, and the rotation shaft. The main structure of manipulator was divided into three parts, which are the...

An intelligent detection robot that can realize air flight and land accesses is studied in this paper, mechanical structure and control system of the robot is designed. The robot is a new type of detection device, it consists of two parts which are unmanned aerial vehicle and crawler and these two parts...

With the improvement of people's living standards, aesthetic values and values, more and more style boiled water pots emerge as the times require. One of the most critical processes is the flattening of the flanges in the pot, which restricted the quality and production of this kind of boiling water...

A kind of high automatic manipulator is designed, the joints of manipulator is controlled by servo motor The manipulator is used for manufacturing lower cover of soybean milk machine. The manipulator includes four axis which are the upper and lower axis, the rotary axis, the telescopic axis and the arm...

To improve the stability and precision performance of partial least square regression (PLS) model in near-infrared analysis application, the consensus strategy was applied in the wavelet domain. Taking the advantage of multiscale property of wavelet packet analysis, a new modelling method was developed...

With the further advance of ocean research and the national security needs, the mooring data buoy has been widely used as an important part of ocean engineering high-tech research. How to deploy them in a convenient and economic way is very important. In the past, the deployment is often accomplished...

The synthesis rate of 2- picolinic formic acid catalyzed by 2-methyl pyridine was studied to investigate the activity of mesoporous catalyst. The purpose is to prove that the mesoporous catalyst we used is a high performance heterogeneous catalyst. It was found that the amount of catalyst, reaction time,...

With the Fluent module of ANSYS software, simulation is conducted on the protection in contaminated areas for a certain type of transport vehicle encountering chemical attack. The distribution of contaminants in the vehicle is grasped, and the contamination of typical parts is analyzed to providence...

By means of core observation, conventional thin slice, cathodoluminescence, scanning electron microscopy, and basin simulation, the environment cause of the sandstone micropore in the reservoir were analysed, the organic fluid and the densification development of the reservoir were studied. The results...

As an important strategic resource, berth and quay crane are relatively scarce. If we can make reasonable allocation of berth and quay crane and make full use of them, then we can greatly improve the efficiency of port’s operations. The first objective of most of issues in the study is to minimize the...

The emergency resource scheduling of hazardous material incidents involves many problems, which affect the people's life and property safety. On the one hand, the paper analyzed the causes of hazardous material incidents caused by human factors; on the other hand, we have put forward corresponding emergency...

Through the search for penetration cracks in the lower bushing of the main bushing, the effectiveness of the combination of oil chromatography and electrical testing is demonstrated. The structure and composition of the main transformer bushing and the common discharge forms and locations are introduced...

In order to analyze the inter-harmonic affections on the voltage flicker, the relationship between the inter-harmonics and flicker analysis are carried out. In order to be able to accurately determine the level of inter-harmonics to make the electric light flicker, inter-harmonic-flicker limit curve...

With the advent of the smart grid era, the concept of power load management has also become more deeply rooted, in recent years, the popularization and installation of load control terminals have greatly improved the accuracy and timeliness of power data collection, which has important practical significance...

Using investigation on Cd in surface waters in 1988 in Jiaozhou Bay, this paper analyzed the vertical changes of Cd contents in waters, defined the settlement processes of Cd contents at temporal and spatial scales. Results showed that in April 1988, in the outer side of the bay mouth, Cd contents in...

With the rapid improvement of the economic level of our country, people have put forward more and more high demands on the safe operation of the power grid. The safety of substation operation is directly related to the safe and reliable power supply of the power network. Therefore, in the operation of...

In the process of rapid social development, there is an increasing demand for electricity in all walks of life, it makes people pay more and more attention to the accuracy of power measurement. In order to the legitimate rights and interests of both sides are effectively guaranteed, it needs to be on-site...

The activities of the wild bird in the natural environment open space make the normal and stable technical performance of overhead transmission lines caused serious obstacles. The effective governance measures of bird hazard are active from thorn, the windmill anti-bird instrument and insulating repelling...

Electric measurement is a very important factory enterprise work, it is also the key for the energy measurement and product cost accounting. The quality management of electric energy metering device is a very important work and is also the key to electric power enterprises and users to establish a trust...

The infrared leak detection technology of SF6 equipment can detect and locate the gas leakage without power failure, and realize the real-time transmission of fault image, improve the efficiency of maintenance, ensure the safe and stable operation of SF6 electrical equipment. In this paper, the problem...

Tree obstacles are trees that may affect the safety and stability of power transmission lines. The paper introduces that the high-voltage transmission line is an important part of the power grid. In the construction and operation of the transmission line in China, it is often challenged by environmental...

The current transformer (CT) is a kind of transformer. The working principle of CT is briefly introduced.Combined with the actual case of relay error trip accident, the specific cause of the accident caused by two point grounding of the secondary circuit loop of the current transformer is further analyzed....

In power system, the normal operation of power grid is based on the intact equipment. According to the past operation experience, once the abnormal state of circuit breaker rejection occurs in the operation of power network, it is very likely that the accident will happen. And such abnormal state often...

Voltage transformer (PT) is an instrument transformer, which is used to transform voltage on line. Chaoyang power supply company has occurred two 10kV three-phase five column voltage transformer burnt out accident. From the angle of accident analysis, the cause of the accident is analyzed. The main reason...

Transformer is the main equipment, whose stable and reliable operation play an important role in the state grid. The process and method of finding overheating faults are illustrated through the case of a 66kV transformer internal fault. At the same time, it is verified that the gas chromatographic analysis...

Using investigation data on As in Jiaozhou Bay in 1982, this paper analyzed the seasonal variation, vertical variations and horizontal distributions of As, and revealed the gravity characteristic and sedimentation of As. Results showed that As’s contents in surface and bottom waters in July 1982 were...

The equipment mainly includes isolating switch, circuit breaker, conductor, insulator, arrester and measurement and control protection device. According to the survey, there were 180 failures in 2017, and the failure rate of the high voltage isolation switch was 10. 53%. In order to improve the power...

This paper states the common stealing electricity types, it is remote control stealing electricity, resistance is strung into watt-hour meter, there is space of stealing electricity, obvious short current coil, interference of high power electric signal and using electricity bypass the metering device...

The rapid development of large-scale photovoltaic power generation is an effective means to alleviate the energy crisis and saving haze. With the continuous expansion of photovoltaic grid-scale, grid access conditions are increasingly demanding. Given the inverter under different grid conditions, its...

In paralleled grid connected PV inverters system, when the design of the inverter control system is connected with the weak grid, the control performance will become poor, and even the operation is not stable. In this paper, a method of impedance analysis is presented, and the equivalent impedance of...

The line project of pole and tower grounding device in Sichuan Province are analyzed in this paper,It points out some problems transmission line tower grounding existing at present.Several kinds of grounding types for transmission line pole and tower are discussed in detail.A closed loop grounding device...

This paper mainly discusses statistical arbitrage model in the application of agriculture futures inter-commodity arbitrage. Based on the substitution relationship, three arbitrage strategies have been designed. Different from the traditional threshold setting method, this paper puts forward the optimization...

This paper examines the crush arbitrage of soybean and rapeseed futures, which is based on inter-commodity arbitrage in the oil processing process. The paper takes soybean, soybean meal and soybean oil futures listed on the Dalian Commodity Exchange, rapeseed, rapeseed meal and rapeseed oil futures listed...

Based on the principle of financial market prices of infection and linkage, the Markov state transition autoregressive model is used to make a comparative study on the Dalian Commodity Exchange and the Chicago Board of Trade soybean futures price linkage relationship. Research model can be well portrayed...

In view of the relationship between diseases and insect pests in the growth process of ginseng, the safety of ginseng planting production and the key scientific problems of product quality and yield are solved, and the signal identification model of ginseng disease and insect pest is adopted to ensure...

During the machining process, in order to ensure the machining accuracy of the workpiece, the workpiece occupy a certain position relative to the machine tool and the tool, and it also can be clamped quickly and reliably, this process equipment that accepts processing or inspection is called the machine...

This paper mainly studies the problem of entity set extension in domain data. On the basis of bipartite graph methods, given an improved algorithm which consider the general case that the edges of the graph have different weights. The designed algorithm can dynamically adjusts the the size of the entity...

In the breeding industry, the use of manual feeds has problems such as inefficiency and high labor costs. In view of the actual needs of the capital and factory buildings in the farm, this paper determines that the electrical system of the intelligent feed truck adopts an economical human-machine interface,...

With the rapid development of the cloud computing, personal health record (PHR) has become a hot topic recently. However, the most important issue is how to implement secure and efficient data sharing scheme since PHR is often outsourced to be stored at a third party. Therefore, the research on a secure...

In order to realize the clock synchronization function of dSPACE real-time simulation platform, RT-LAB simulation platform, Vortex real-time dynamic simulation system and hardware controller, etc, a hybrid clock synchronization method is proposed in this paper. The master clock server output includes...

Numerical simulation is of great importance as implementation guides of polymer flooding projects. The history matching process is one of the main tasks of numerical simulation. However, there are still significant difficulties remaining in the history matching process of polymer flooding simulation...

With high concentration or high molecular weight with high concentration plugging slug can enhance recovery further, which make full use of high concentration polymer viscoelastic before stopping polymer flooding. These layers are usually well developed and connected, and has a certain pressure rise...

This paper proposes a new method of image enhancement. Firstly, the image is sharpened by Laplace operator, and then the low frequency part of the image is removed by non-sharpening filtering, the high frequency part of the image is retained which will obtain a high pass image. At last the high filtering...

Structural Parameters of frame of electric sightseeing vehicle are designed, three-dimensional model of frame is established using CATIA Software, static analysis of established frame model is conducted under full-load condition using Ansys, the result shows that designed intensity satisfies intensity...

With the popularization of network technology, the construction and application of network resource database has become a hot spot. However, there are common problems in the construction and application of the resource database, such as the slow update and unstable quality of resource database construction,...

The harmful substance in food and drink often brings the harm of different degrees to people's health. The lack of effective substance in health food cannot meet the needs of people's supplementary nutrients. Therefore, it is very important to detect the amount of harmful substance in common food and...

Summarizes the status of Tibetan text sentiment analysis, and analyzes that its current problems are mainly the deficiency of basic tools for text processing and the lack of annotated sentimental corpus. This paper proposes to apply cross-language techniques to the construction of Tibetan sentiment dictionary...

In order to satisfy the requirement of equipment layout of the decontamination station, using SLP theory and method to transform the decontamination objects and decontaminant into logistics objects, and the internal equipment layout of the decontamination station is designed. First, determine the decontamination...

The development of computer technology has now been integrated into our daily lives and played a good role in the integration of various production activities and other technologies. This article will briefly discuss computer-related applications and developments, and combine information security with...

Several protocols implementing attribute-based group key exchange, which allows users with certain set of attributes to establish a session key, have been proposed in recent years. However, attacks on attribute-based group key exchange in current research have been considered only in stand-alone fashion....

Now, with the rapid development of science and technology in China, computer networking technology is leading the development of the time, giving a strong support for people’s daily life. Various traditional industries have been integrated with computer technology, which is an evitable trend in line...

According to the macroeconomic data in Xi’an real estate industry from 1988 to 2016, the long-term development and short-term fluctuations of real estate investment (REINV) conform to the following rules: firstly, continue their own developmental inertias; secondly, the impact on Xi’an REINV mainly comes...

Cleaning robot can provide cleaning services, which is greatly needed in the market. Matlab software can be applied to better conduct the simulation of cleaning robot controller, which can solve contradictory problems between requirements of students for the class and actual class environment, and can...

In order to cope with the problem of electric power stealing in the power supply company for a long time, according to the influence factors of the accuracy of the electric energy measurement, from the four aspects of current, voltage, phase and installation connection, several common ways of stealing...

The application of fuzzy PID algorithm in air conditioning control system not only offers the latter a chance to adjust parameters intelligently, but also helps to get the capability of intelligent frequency modulation. This paper hereby explains the realization methods of fuzzy PID algorithm in air...

On March 12, 2017, in the Qingyishan area of Dandong City, a number of multi-point accidents with similar accidents occurred in a short period of time. Through the accident investigation, it was found that white powder adhered to the surface of the failed power equipment. After the accident, the white...

This paper starts from domestic and foreign current status of space laser communication, and analyzes the development trend and key technology of space laser communication.

With the transformation of power network in recent years, the metering function of electric energy meters plays an important role in electric power work. Due to the defects of the electric energy meter and the external uncertainties, measurement error is easy to cause when measured. In addition, a certain...

Cleaning robot is widely applied in modern society. This paper introduces the development of cleaning robot and its utilization characteristics and requirements, and briefly analyzes the design and simulation of cleaning robot controller from various aspects.

In the management of electric power enterprises, meter reading, accounting and charging are not only three important aspects of electric power marketing, but also the key-point of the work at the same time. This paper puts forward opinion on how to improve the efficiency and quality of meter reading...

Android is an advanced development language applied to mobile devices, with great prospect for the application to market. This paper analyzes the development and characteristics of Android, and introduces the development and relevant application of urban logistics platform based on Android.

With the advanced development of the society, ice storage air conditioning system develops towards intellectualization. The control system of ice storage air conditioning is required to be equipped with parameters of intellectual regulation to control the temperature. In operation, ice storage air conditioning...

According to the statistics of the National Bureau of Statistics, the number of fires in China has been increasing progressively year after year and it is more than 125,000 each year on average; thereinto, 152,157 fires occurred in 2012, with 1028 deaths and direct economic losses of 2.177 billion yuan....