This study analyses a disk braking caliper bench testing machine under braking conditions, to testify its structure characteristics. The analyzed objects include rotating axes and six counterweights. The first step is to use the design software SolidWorks to build axis and counterweights models. Next,...

With the accelerating of urbanization in China, the urban land use efficiency has relationship to allocation of resources, and has influence on the quality of human life and sustainable development. Aiming at the shortage that traditional DEA model can't make further evaluation on effective Decision...

This paper had explored the effects of different contents of silicone defoamer for time of coagulation and compressive strength of building phosphogypsum. At last, this paper had used origin software to deal with the data of test and verified fitting equation.

Two support equipment range merging optimization methods, i.e. direct optimization method and dynamic programming optimization method, were proposed in this paper. Direct optimization method is more suitable for simple systems with only limited types of support equipment, while dynamic programming optimization...

In order to study the applicability of instrument rating test for different types of fabrics in color fastness experiment, spectrophotometer and digital image grading system were used to rate in different conditions for different types of fabrics .Testing conditions include color-different formulas,...

Gas explosion is a kind of serious natural disaster in coal mines. In order to prevent gas explosion accidents, it is necessary to study the characteristics of gas explosion under different temperature and different pressure conditions. In this paper the influence of gas explosive limits under coupling...

Metal streamline is the organization of fibrous distribution of impurities, compound, and segregation along main deformation direction on macro test block, which is of great influence on mechanics of members, use and process performance. Pump body is the key part of diesel engine which adopts longitudinal...

It was analyzed by using flat-type specimens that studied the influence of sand percentage on early-age cracking behaviors. The results showed that concrete early cracking area was decreased first and then increased, while early cracking area was the smallest, as sand ratio of C30 and C50 were separately...

The surface worn date of the bullets shot from three type guns were collected by applying collection instrument, and the worn topography of bullet surface was studied by application of fractal theory, its surface worn show the fractal characteristics. The fractal dimensions about the profile curve of...

From three dimensions of reviews features,reviewers and readers, an empirical study on 361 valid samples of Jumei.com,to discuss the affecting factors of online reviews helpfulness.The results show that text length, reviewer rating and response number have significant positive impact on review helpfulness,...

The deep transformation of green development of economic is the trend of the new normal of China's economy. Nanchang National Hi-tech Industrial Development Zone has developed rapidly, but there are still many problems in the process of its development, which need to ensure the sustainable development...

Business model innovation is helpful for enterprises to gain competitive advantage, to create long-term economic profit, more and more enterprise management experts and scholars began to pay attention to and study business model innovation. How can we achieve the business model innovation, and ultimately...

With the development of the lightweight trend, the wheel rim of automobile is always made of aluminum alloy, which put forward higher requirements to the capability of the rim. Because of its big size, complex figure, and material with hard deformation, the wheel rim always take on cracks during the...

This paper mainly discusses the tool condition monitoring based on dynamic sensitivity, and explores a method for characterizing tool condition characterization. Firstly, the sensitive directions and components of different orders low modes were analyzed in the static state. Modal parameters and the...

The possibility of dispatching misoperation under integrated dispatching and controlling and the defects of the existing dispatching misoperation prevention system were analyzed. A method about the integration between real-time data from dispatching SCADA system and data from substation misoperation...

In the age of the flush creative products, products with the idea of Without Thought can always agree with users' preference, which makes them occupy a good market. By studying product design method based on Without Thought, this thesis will try to explore the innovative design method from different...

To effectively manage and control the cost of flue-cured tobacco has a strong theoretical significance and practical guidance. Firstly, the concept of the sensitivity of tobacco production cost index is introduced, and the sensitivity analysis model of tobacco production cost index is established. Secondly,...

This paper explains and demonstrates a Anti-misoperation system based on UHF and LF RFID combined with sensor network, which can avoid the vices of the current system in the substation. It introduces the principle, framework, hardware design and main functions. This system has improved the reliability...

A new method for improving resolution of displacement measuring system is developed in this paper. The core parts of the system is a grating interferometer and a phase-shift device. Moving the photoelectric sensor, between the two interference fringes, the signal phase of the interference fringe will...

Coal tar sample was extracted by supercritical n-pentane. The mass ratios of solvent to solute were researched in different pressures and the extraction yields were explored in 4-12MPa at 215 . The results show that, the mass ratio affects extraction yield distinctly and the extraction yield increases...

The morphology of work piece surface obtained by electrical discharge texturing (EDT) is systemically analyzed in theory in this paper. By using negative electrode, graphite electrode and different electrical parameters (peak current, pulse width, pulse interval) experimental method to machining Non...

In the electric power system, the traditional unlocking key management method has many drawbacks, such as inconvenient examination and authorization, troubled operation, inaccurate records. An intelligent unlocking key management system is presented, which is based on network centralized control. This...

A kind of combined seal of magnetic fluid seal and mechanical seal was designed in order to improve the capacity in the magnetic fluid seal for sealing liquid for the performance of increasing saturation magnetization and magnetic field strength was not satisfied. It mainly indicates the pressure-resistant...

According to the shortcoming of current financial early warning model, a early warning model considering the overall risk in the production and operation of enterprises was built. By comprehensive risk analysis, this early warning model can mining the fundamental problems existing in the company. According...

The mechanical behaviors of composite bolted joints which are typical connection units of aircraft structures might change due to the application of liquid shim or laminated shim with different thickness. In this paper, the bearing capacity of composite bolted joints with different shim are studied numerically...

There is much condensate water formed on the surface of the pipeline carrying low temperature crude oil in Da Hinggan Ling Prefecture,because of the coefficient of the high relative humidity and the difference in temperature between the pipeline and air. In this article, a new superhydrophobic & anti-corrosive...

The 3D solid models of two different testing physical model case of a diesel engine block are established. Based on those two cases, a static analysis on the preload working conditions and explosion working conditions are conducted for the engine block structure. The results shows that the stresses of...

To study the deformation behavior of the nanorods and further explore the deformation difference among nanorods, nanowires and bulk materials, the uniaxial tension of aluminum nanorod under different stretching rate was conducted by the molecular dynamics method. The effect of stretching rate on the...

In the period of China's express delivery market rapid expansion, the postal express business has declined in Shaanxi Province. Improving customer satisfaction has become the important tool to maintain and increase market. after analyzing postal express logistics business situation and competitors in...

The revolution of computer and network technology forcing the science and technology departments to realize the science, standardization, modernization of science and technology management. According to MIS system model, this paper did the overall design of science and technology management information...

Based on the typical T joint full position automatic welding, the mathematical model of the saddle shaped trajectory of the intersection line is established, and the drive system of the multi dimension and multi degree of freedom is designed. The control system uses the distributed control mode, based...

The existing time could be years or even decades for goafs formed in mining. The rheological property of pillars may cause tensile failure in roof, and finally induce goaf catastrophic accidents which put serious threats to people underground and buildings on ground. Previous studies on goaf safety involving...

Considering the process of inland waterway transport modernization and the practice of Chinese government "Inland ship standardization project" in recent years, this paper aims to study on the index system of inland ship modernization, which can be summarized as "safety, efficiency, green, and advance",...

This project is focused on the critical parameters affecting nugget formation through both electrical-thermal analysis and thermal-mechanical analysis during resistance spot welding (RSW) process. The object of this study is three stacked up sheets instead of conventional two sheets assemblies because...

The acoustic signal of the distribution transformer contains a much of information about the state of the transformer operation. Therefore, the fault diagnosis method of distribution transformer based on MFCC and HMM is proposed. The acoustic diagnosis process of transformer fault can be divided into...

As the most potential development method of heavy oil reservoir, in-situ combustion has the maximal recovery factor due to its multiple displacement mechanisms. The paper presents the enhancing oil recovery mechanism of in-situ combustion through analyzing the combustion principle of crude oil in reservoir...

Based on the application of ceramic furniture and material in traditional furniture design, analyze the probability of ceramic material application in modern bamboo furniture design and further search the methods of such application.ÿIt can enrich the design content and pattern of manifestation of modern...

The thermoplastic composites have widely regarded as high property structural materials for aerospace field for the excellent advantages, which were usually procured based on the moulding process under the high processing temperature and cooling rate. The thermo-residual stresses of the composites will...

Determination of compaction degree is an important method in the foundation treatment, especially in the foundation quality detection after the replacement of crushed stone. According to the basic engineering, foundation treatment and other relevant theoretical knowledge, to calculate the degree of compaction...

The 42CrMo bar has been widely used for its outstanding mechanical performance. Before bar leaves rolling factory, the straightening process should be used to keep bar's straightness. However, the residual stress is also generated simultaneously, which largely affects the bar in using. In this article,...

Since the Belt and Road Initiative was proposed by Xi Jinping, the ASEAN-China Free Trade Area has been increasingly upgrading. In this background, this article thoroughly analyses the complementation of the aquatic trade between China and ASEAN based on the HS classification, by calculating the Grubel-Lloyd...

In the unstructured Peer-to-Peer systems, a core operation is efficient location of resources. Conventional informative searching algorithms, however, always cannot perform well under peer churn rate network environments. In this paper, we designed a robust unstructured peer-to-peer files sharing system....

The Sm2Fe17 fine columnar crystals ribbon was obtained by melt-spinning at 6m/s surface rotating velocity of Cu wheel and in suitable thickness of ribbon. Preparation process of its nitride powder was primarily explored by means of XRD, SEM and the measurement of magnetic properties. The columnar crystal...

The moulding process of 3D-braided PEEK/LQ prepreg is studied by optical microscope, scanning electron microscope and tensile testing machine in this paper. The mechanical property of composite with different fiber content is analyzed as well. The results show that a better impregnation of moulded PEEK...

On the basis of the text extraction based on the density of text, the Web page text extraction algorithm based on the adaptive threshold was proposed and applied in the new rural community employment information service system for the employment information fetching from the related government affairs...

In this paper, the bearing forces and anti-seismic properties of the wall panels and connection through the experimental research on the two connecting modes of the two composite wall panels with the steel frame are obtained, which provides the theoretical reference for the development and popularization...

This research is presenting a strengthening technique for increasing punching shear resistance in reinforced concrete two way flat slabsusingdifferent concrete mix with different ratios of high performance micro polypropylene fibers as an additive.Sixteen experimental testshave been performed for the...

This research is presenting a strengthening technique for increasingone-way shear resistance in reinforced concrete flat slabs based on addingmicro polypropylene fibers during concrete mixing. Concentric loading is used in this research for studying the influence of different ratios of fiber on the behaviorof...

Experimentalresults offlat slabs cast with concrete enforced with micro-polypropylene fibers showed increased shear strength; this was attributed to increased tensile strength associated with the added fibers. It was also observed that the mid-span deflection at ultimate load increased for concrete strengths...

With the continuous development of science technology and society, machinery industry got the unprecedented development. Among them, the loader played an indispensable role. As a core part of the loader work, loader lift arm has the effect of bearing and transmission power. The loader lift arm often...

LS-DYNA and ANSYS software are adopted to simulate hot stamping and quenching processes of M-shaped 1038mm*1.85mm B1500HS automobile anticollision beam. Different stress distribution are obtained among different start temperature as 800 , 850 , 900 , 950 and different stamping velocity as 25mm/s, 50mm/s,...

In order to study the influences of different thermal curing methods on volcanic activity and mechanism of rich-silicon iron ore tailing powder (IOTP), different specific surface area and curing conditions of IOTP were tested, at the same time, the strength, pore size distribution(MIP) and the structure...

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...

A fluorescent non-doped white organic light-emitting device (WOLED) with double emissive layers was fabricated. The yellow and blue dyes, 4- (dicyanomethylene) -2-t-butyle-6-(1, 1, 7, 7- tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) and 9, 10-di (2-naphthyl) anthracene (ADN), can be realized by blending...

In this study, we propose a novel complex neural network algorithm, which extends the neural network based approaches that can asymptotically compute the largest or smallest eigenvalues and the corresponding eigenvectors of real symmetric matrices, to the case of directly calculating the largest real...