White organic light-emitting device have been fabricated by using highly blue fluorescent dye 9,10-di (2-naphthyl) anthracene(ADN) and 4- (dicyanomethylene) -2-t-butyle-6-(1,1,7,7- tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB), together with well known green fluorescent dye 10- (2-benzothiazolyl) -2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,11H(1)-benzopyroyran-o...

We generally try to understand the concept of smart education from the perspective of ecology. The so-called smart education is a sort of education information ecology, whose operation should be backed up by modern information technology, including the Internet of Things and cloud computing etc., and...

Smart education system, an advanced form of modern educational informatization supported by technologies like cloud computing, Internet of things and mobile Internet, builds ubiquitous network environment, cloud computing data center, sensing system of multidimensional Internet of things and all kinds...

Structure and working principle of parallel hybrid car power system were introduced. Design method of power system parts, such as engine, motor, gearbox and battery pack were proposed. A parallel hybrid car power system design was introduced as an example. Power system performance simulation model based...

When articulated heavy vehicles (AHV) are turning or under the action of lateral force, a serious swing and folding often occurs owing to the interaction between the tractor and the trailer. In order to solve this problem, the AHV is simplified into two parts, i.e., tractor and trailer, then the dynamics...

NaNbO3 and KNbO3 powders were prepared respectively by the hydrothermal synthesis method. The obtained powders were mixed with the molar ratio of 1:1 and dry-pressed, the (K0.5Na0.5)NbO3 (KNN) lead-free piezoelectric ceramics were obtained by sintering at 1060-1100 øC at normal atmosphere. The effect...

The coarse tracking system of compound axis control system has been determined. But the deep understanding of the coarse tracking system can only be analyzed by the measured operation data. Thus the linear model of the coarse tracking system can be identified only by the measured data. In this paper,...

In this era of rapid subversion of the Internet, China's traditional enterprises are experiencing unprecedented transition pains. Based on the tea industry business models, analysis of tea industry's traditional business model, as well as new business models, and as a basis for further analysis of problems...

Low power consumption has become an extremely important design goal for system-on-chip(SOC). This paper analyzes the impact of power consumption on the digital chip and the composition of power consumption in the circuit, and then proposes a low-power implementation strategy for SOC system with embedded...

Sound source separation (SSS) is a very important processing in room with multi-source. Common methods for SSS do not perform well in reverberation room. Time reversal technique (TRT) has many advantages to provide a solution for room acoustic problem. We propose a novel method of SSS based on TRT (TRS)...

The coarse turntable has been determined. An important prerequisite for designing the composite axis control system and selecting the device for the precision tracking system is to establish an accurate coarse tracking model. Only have a set of measured operating data with non-differentiable nonlinear...

Automatic navigation system of the facility agricultural machinery (FAM) is designed to realize the operation accuracy, production efficiency and using security, so that the farmers can be liberated from the heavy and monotonous field work. According to the indoor working characteristics of facility...

Vibrating wire sensor has advantages of strong anti-interference ability, high sensitivity, easy to long-distance transmission, etc. However, currently only used for static testing technique, in geotechnical engineering and other fields. In order to make the advantages into full play, expand its application...

According to the characteristics of teaching of urology, teaching can be applied individually in accordance with students' aptitude in the teaching of urology. By switching the teacher-centered class to the learner-centered discussion, we can build multidimensional learning environment, guide the students...

This paper analyses the mechanism of impact vibration on electronic equipment of the sensor and the vibration isolation, as well as buffering mechanism of cushioning materials. And for the impact environment of electronic equipment of the sensor, the design of the structure against the impact of high...

Medical students through a variety of forms of pre-service training, can eliminate the strangeness of the internship, fear, have confidence in upcoming internship. Realize the transition, strengthen the practice of the students' ability to adapt and their sense of mission and sense of responsibility....

According to the characteristics of diseases of urology, doctor-patient communication can be applied individually in accordance with patients' comprehension. Improve the understanding of diseases. The development of multimedia technology makes the isolation ward is no longer isolated space, use of multimedia...

Aiming at the light-weight design of tower for under typhoon wind turbine, the typhoon environment load cases and control strategy were researched. Based on the conventional design of under typhoon wind turbine and GB/T 31519-2015 wind turbine generator system under typhoon condition standard, a developed...

Research on lateral-directional attitude under-actuated control of the hypersonic vehicle with only the aileron, a new lateral-directional control strategy based on the idea of cascade was proposed, that can realize the roll angle control and guarantee the stabilization of the sideslip angle. Using the...

Hall voltage sensor is one of the most widely used sensors in the field of today's electronic measurement. It can completely replace the traditional transformer and shunt, and with the advantages of high precision, good linearity, wide frequency band, fast response, strong overload capacity and without...

In the paper, we develop a new car-following model considering the prevision driving behavior on a single-lane road. The model's linear stability condition is obtained by applying the linear stability theory. And through nonlinear analysis, a modified Korteweg-de Vries (mKdV) equation is derived to describe...

The present study develops a conceptual design methodology for battery-powered mini-UAVs. The methodology is adapted to address the peculiar characteristics of battery-powered mini-UAV and rewrites master and sizing equations which are related to the airframe weight and weight portions of battery and...

A model test is executed to verify a reverse derivation method for acquiring input excitations from dynamic responses of pier under collision loads, upon the train-bridge system test platform. A dynamic strain is measured at the bottom of pier under collision, and then the corresponding collision forces...

Authentication and key agreement scheme is an important mechanism for legal users to access the services of wireless sensor network. However, the design of authentication and key agreement schemes in WSNs is still quite a challenging problem. In this paper, we analyze a strong authentication scheme with...

In order to solve the problem of accurate modeling of main steam temperature in ultra-supercritical (USC) unit under variable load conditions, the BP neural network model was established based on the field operation data. Considering the operation mechanism of the process, combing the relevant analysis...

To ensure the security of high speed railway, the basic principle of MFL detection was analyzed. The absolute peak value, the peak-peak value and the peak spacing are selected as the MFL signal features. The relationships between the defect geometry parameters and the MFL signal features are researched...

Based on a temperature measurement principle of Brillouin optical time-domain fiber sensor, an optical fiber temperature distributed sensing system was established. Brillouin frequency shift temperature coefficient of the system is calibrated by measuring the Brillouin frequency shift spectrums of the...

Wireless underground sensor networks (WUSN) are an emerging research area that promises to provide communication capabilities for buried sensors. The main difference between the WUSN and the terrestrial wireless sensor networks is the aspect of wireless underground sensor networks which communicates...

When space robot arm implement the task, there was a certain requirement to tracking and contacting force in order to ensure the accuracy of the mission, and the structure of the robot arm was also affect the controlling effect. For this reason, we took considering the effect of the flexible joint /...

Combine ZigBee and GPRS communication technology to design farmland image acquisition and transmission system. The system is composed of JN5139 ZigBee communication network and remote server monitoring software. Use JN5139 ZigBee chip to control the camera module with serial port to collect farmland...

Aimed at the formation of multi-robot in 3D space, a new path planning method was proposed based on the market auction method and tangent circle method. This method makes use of the market auction method to allocate tasks so that the robot can obtain the coordinates of each task in the low energy consumption...

A new intelligent temperature-controlling, speed-regulating electric fan was designed. Environment temperature and human body surface temperature were separately detected by using a temperature sensor DS18B20 and a non-contact measuring transducer for surface temperature. On this basis, fuzzy expert...

Food safety events continue to emerge in China, which exposures the issues existing in food safety supervision and food safety information service. We should explore and research the rational solution to track the process of food production and circulation of the chain, to release and collect information...

With the development of HVDC, transmission capacity and transmission voltage level are both increasing. Under this situation, designing reliable grounding grid is more demanding. For areas with high soil resistivity, the grounding parameters can hardly meet relevant requirements. To solve this problem,...

Canonical correlation analysis (CCA)-based methods have been widely applied to frequency recognition in steady-state visual evoked potential (SSVEP)-based brain-computer interface (BCI). However,it is hardly to obtain optimal recognition accuracy from electroencephalogram (EEG) signal mixed with variety...

Under the influence of environmental problems,there are increasingly large scale fitness group puts forward higher requirements on the bike.At present, there are various form and pecifications of the bicycle. The recombination of bicycle when unpacking the case affected the the trend of the development...

A research has been carried out on the dynamic analysis and simulation of parallel robots due to the situation where parallel robots tend to break down on account of large stress during movements. In order to study the force condition of the robot on the move, a mathematical model, based on the Kane...

This paper mainly optimizes the level and period of congestion pricing in single-step-toll method on a bottleneck link. Firstly, Greenshields model is applied to obtain the queue length and the speed of the moving part at a stable state. Then, the bi-level programming model is established, in which the...

To meet the need of electric power parameter acquisition in intelligent street light control system, STM32F103 as main control chip, ATT7022E for electric energy metering chip, three-phase power parameter acquisition module is designed. This module has the instantaneous voltage and current, active and...

Ultra-low frequency electromagnetic transmitter is typically used equipment that tracking position in the pipeline. Effective receiving distance which is determined by the emission field strength is one of the most important performance parameters of such equipment. Moreover, transmitting antenna coil...

Objective To investigate the effect of attenuation correction on the gating data based on the true coincidences event of detector ring with the application of PET/CT.Methods Use the software GATE that can simulate the imaging of PET/CT to do the pixel phantom simulation in order to simulate the respiratory...

Making a virtual design and optimization of Front suspension aimed at FSAE. Based on parameter calculation and design of front suspension and use the ADAMS/Car to make a simulation analysis to get the unreasonable function parameters as the objectives basis of the optimization. Determine design variables,...

Micro in-pipe robot is a kind of mobile robot, which is suitable for small caliber pipe. The mobile mechanism is one of the important research contents in the field of robot research. ADAMS software is used to simulate the 3D solid motion of the six wheeled robot, and the kinematic model of the constrained...

To study the temperature distribution characteristics of small artillery barrel under different shoot conditions, this article first establishes the propellant gas temperature equations during the interior ballistic period and the aftereffect period, based on which the initial conditions of heat transfer...

In this paper, a two-degree of nonlinear vibrating system of landing gear is studied. A delayed velocity feedback is applied to suppress the vibration of the landing gear structure. The dynamical behavior of landing gear system is investigated when the 1:3 internal resonance and primary external resonance...

In order to improve the design efficiency and quality of hydraulic manifold blocks, architecture of intelligent CAD system for hydraulic manifold blocks was proposed. A component layout rule library and an oil circuit connection pattern library were established to integrate empirical knowledge, design...