Composites made from phenolic resin are filled with natural graphite powders and carbon fibers were prepared through hot compression molding. Effects of carbon fiber content on the mechanical and tribological properties were investigated. The results indicated that the impact strength increased, friction...

In this paper, the TiN-based of CrTiAlN multiple composite coating were deposited on die steel substrates .The phase structure, chemical composition and morphology of the coating were tested by XRD, SEM and EDS respectively. The adhesive strength between film and substrate and microhardness about the...

Multi-drug resistance (MDR) is an important element which leads to ineffectiveness of chemotherapeutics. The discovery of histone acetylase’s unusual activities in tumor cells provides a new area for the cure of cancer. And histone deacetylases inhibitor (HDACi) is used as a new agent in clinical therapy....

Graphite/phenolic-based composite was fabricated through hot compression molding followed by heat-treatment process. The length, density, flexural strength and electrical conductivity of composite are analyzed to determine the influences of heating rate on the physical, mechanical and electrical properties...

Geothermal water is a material widely used to provide thermal energy for heating supply in China. To protect the water resource, save energy and ensure the sustainable economic development, more attention must be paid to reach the rational utilization of the geothermal water. In this paper, gradient...

The energy consumption is increasing year after year with the development of economy in our country. Improving and optimizing the way of energy use constantly is necessary. Industrial waste heat is the energy which is not used in the thermal conversion equipment and energy-using equipment in the process...

This paper uses heat pump technology to study a novel thermal energy efficient utilization system for geothermal water. It is a comprehensive utilization of heating system that high temperature geothermal water directly supplies heat stage by stage with combining two-stage water source heat pumps. Results...

By using the Fluent built wind field for 6 types multi structures of louver fins by numerical simulation. Through the comparison of the heat transfer and flow properties of region division method, obtains the best. The results of the study show that, in the wind speed for the 2.5m/s case, region partition...

Noise is one of the most main factors that affect the reliability of the power line communication; its time-varying characteristic is very strong, so noise acquisition and efficient storage is a must. But now, the noise sampling rate is too high, only a few hours, the amount of data storage may reach...

This paper presents an fine approach to improve the process planning of Rapid Prototyping/Manufacturing (RP/M) .Corrected curves were introduced to maintain the accuracy of slicing layers. A mixed algorithm combined by tangent line and ellipse fitting method was developed to balance accuracy and build...

In the present work ,according to the present situation that casing pipe are frequently applied in the high temperature environment containing hydrogen sulfide and carbon dioxide, degradation of mechanical properties of casing pipe in the environment with hydrogen sulfide and carbon dioxide is also investigated...

A novel route was developed to construct luminescent lanthanide-based mesoporous materials. Ligand 2-(2-hydroxyethyl)carbamoyl-benzoic acid (L = HCBC) was synthesized by modification of phthalic acid, and then was introduced into a preparing MCM-41 host by the reaction between the hydroxyl group and...

A FeCoNiAlTiCrSi high entropy alloy coating was cladding on the surface of Q235 steel by laser using FeCoNiAlTiCrSi as basic alloy powder in which B, C, and Y2O3 were added as a in situ synthesized elements. The results show that the 2mm thickness coating with no crack and pores was prepared under the...

Based on power bond graph-block diagram method the general mathematical models of the suspension cylinder, hydraulic pipes and accumulator are established and the simulation model is established based on SIMULINK control simulation software. A heavy-duty anti-rolling suspension system is used as a study...

In order to solve the problem that lower hole-making rate of gas drainage in soft outbursting coalbeds, the ZDY12000 drill is designed. The drill is composed of drilling system and dynamic system. The drilling system including spinner,gripper,feeding body and frame, dynamic system including electromotor-pump,...

ZnMn2O4 films with a structure of Ag/ZnMn2O4/p-Si were fabricated on p-Si substrate by magnetron sputtering. The effects of sputtering power on microstructure, resistance switching properties and endurance characteristics of ZnMn2O4 films were investigated. ZnMn2O4 films are spinel structure and the...

The effect of substrate temperature on the resistance switching properties and the endurance characteristics of ZnMn2O4 films, deposited on p-Si substrate by magnetron sputtering, was investigated. The ZnMn2O4 films deposited at various substrate temperatures are polycrystalline with spinel structure....

Ligand N2,N6-bis(2-hydroxyethyl)pyridine-2,6-dicarboxamide (BHPC) was synthesized and used to construct lanthanide-based mesoporous material Tb-BHPC-MCM-41. In the structure of the luminescent material, BHPC was anchored into the forming MCM-41 host by the reaction between the hydroxyl group and active...

The absence of highly tensile residual stress which distributed in laser welded joint is primary factor of decreasing fatigue life. Laser Shock Peening (LSP) experiments were conducted on TC4 laser welded joints of 2.5mm thickness, using circular laser spot with pulse duration of 10ns, laser power density...

Factors affected drying speed of energy saving and environment friendly water-based self-drying / fast-drying foundry coatings and its regularity changing were analyzed. The results show that the self-drying speed of coating is improved significantly with the decrease of humidity and the increase of...

The warpage in a glass fiber-reinforced polyamide molded part caused by the sharp corner effect and differential shrinkage could be effectively reduced by optimizing the injection process parameters using numerical simulations. The results showed that adopting a three-gate injection method could effectively...

A Numerical method of frictional behaviors in the microscale is presented to meet the simulation demands of the tribological characteristics for composite sealing ring in the transmission of heavy-duty vehicle. The microscopic dynamic responses of sealing surfaces are visualized when loads are applied...

The relationship between natural frequency and prestress-force is built to evaluate effective prestress-force of beams based on the theory. Two corresponding test mode beams are built up to verify the theory, the experiment results show that the natural frequency will decrease along with prestress-force...

Grasping the field distribution rule of oxygen, gas and other gases in gob of coalmine is the basis to study the oxidation spontaneous combustion, gas combustion and explosion of gob, having important significance in coal fire prevention and gas control of gob. Due to the destructiveness and concealment...

Monoclinic Li1+xV3O8 is an attractive cathode candidate for lithium-ion batteries. Here Li1+xV3O8 precursor was synthesized via a electrospinning process using LiNO3, NH4VO3 and citric acid as raw materials, and followed by a thermal treatment at 450°C for 5 h in air atmosphere, to get well formed Li1+xV3O8...

Titanium nitrides composite ceramic coatings are a material which possesses high mechanical properties, being often used in order to protect the substrate thus increasing their lifetime and also working in harsh environments.In this study, the paper presents the experimental results on deposition of...

Al2O3-metal composite coatings were successfully prepared on carbon steel substrate by self-propagating high-temperature synthesis(SHS) melting-casting means.The effects of transition layers of a bi-layered structure on the interface combination status of the coating were studied in detail,including...

In order to improve the surface compatibility of bamboo pulp fibers (BPF) with plastic materials, enlarge the application fields, BPF macromolecule which was modified by 2-bromoisobutyryl bromide (BIBB) was chosen as the initiator. Copper(II)bromide/ N,N,N ,N ,N - pentamethyldiethylenetriamine PMDETA...

A novel themosensitive in situ gel was prepared by using Poloxamer407 and poloxamer188 combined with membrane penetration enhancer Guanidine-Chitosan. Orthogonal experiment optimization was used to study of formulations conditions that suit to intranasal drug delivery. The optimal intranasal gel formulation...

A novel glycyrrhizic acid (GA) mediated Calcium-alginate nanogel was successfully prepared by using GA, calcium chloride (CaCl2) and sodium alginate (SA) through reverse W/O microemulsion combined with controlled internal gelation method. Nanogels were characterized by Fourier transform infrared spectroscopy...

For it is hard to develop experiments for the gun breechblock system, a shock test bed is designed for it. During designing, the breechblock operating force is one of the key test parameters of the shock test bed for gun breechblock system. In order to choose a reasonable value to open breechblock, influence...

Aerodynamic heating would generate high temperature rise on aero engine structure and severe temperature gradient on the body of assembling materials at the front of gas inlet which would develop heterogeneous temperature and thermal stress field and influence the kinetic characteristics of mechanical...

The effect of the spoilers depend considerably on the lift and trim moment that change the floating condition of the ship and then influence the flow field near the stern and the resistance of the ship. To investigate the effect of the spoilers on on the ship resistance caused by lift and trim moment...

The residual stress and welding deformation were measured for the bogie frame steel plate SMA490BW butt joint welded by using the plasma-MIG hybrid welding process and the general MAG welding process respectively, as well as in different groove angle conditions. The results indicate that the plasma-MAG...

Recoil displacement, recoil velocity, recoil resistance and gun carriage stress were selected as the key dynamic parameters. Measurement programs were developed respectively according to the characteristics of dynamic parameters. Live firing test was carried out, and measurement results of dynamic parameters...

Soda slag, produced as the solid waste from the ammonia-soda process, was treated by heating, adding additives and other methods. It was found that the chlorine ion content changed with the treatment of heating or adding additives. Heating treatment showed little effect on the decrease of chlorine ion...

As an important city of Songhua River Basin the ecological pattern of urban landscape in Harbin not only has the common characteristics with frigid cities but also has its own distinctive characteristics. The thesis made research of structural layout of water space and development direction of landscape...

Early deformation cracking is a widespread problem in base concrete walls of high-rise building. In the view of material to solve concrete cracking at early age, new-anti cracking functional materials make it by reducing shrinkage and regulating hydration heat. In this paper, several groups of concrete...

The conditions of roasting activation of fly ash with NaF as assistant and extraction of Al2O3 by acid leaching were studied. The effects of conditions of roasting activation and acid leaching on the leaching rate of aluminum from fly ash were investigated of the pre- and post-extracted fly ash were...

The composite photocatalyst La-TiO2/H was prepared by coprecipitation method, the methylene blue (MB) was used as the target pollutant and the influence factors of degradating MB by La-TiO2/H were discussed. The results showed that the optimum conditions were that the initial mass concentration of MB...

The wind turbine blade is the most complex part of wind turbine generator system (WTGS).The blade itself will produce flutter and divergence under the joint effect of vibration model and aerodynamic force. That the coupling resonance of tower and wind turbine impeller will be produced, when the natural...

With the development of transportation industry, there’re more and more traffic accidents caused by the vehicle driving, bring great potential safety hazard and economic risks to the drivers and their families. Therefore, it’s of great importance to take a study on airbag application especially on computer...

Sunshine one of the most severe factors makes great effects on the mass concrete construction, especially on larger reinforced concert silo. In order to calculate the temperature distribution of the reinforced concrete silo subjected to the solar radiation, an easy-to-use tool is required for a transient...

Heilongjiang province is the lowest temperature provinces in China, the cold environment cause the freeze injury of the hydraulic engineering, the soil slopes of larger canal often collapse, so there is many difficulties in the water transmission of irrigation and draining canals and the engineering...

This research work has focused on the examination and verification of the influence for road user that the presence of the width of a traffic securing in winter in the snowy region, by conducting several experiments using driving simulator and the real car. And then, the management widths for senses...

To achieve a high-resolution imaging of targets in space, it is important to reduce the effects of atmospheric turbulence in adaptive optics systems. In this paper, we propose a simple and tunable low-order robust compensator for adaptive optics system, based on the robust model matching method. We have...

The construction process of project group is full of uncertain factors, large numbers of resources are required, and it is easy to lack of certain resources. Based on programming theory, the project group resource reallocation optimization model is established when supplied resource quantities are insufficient....

The investigation and testing of the rural building in Ningxia found that the indoor thermal environment of existing residential buildings was not enough to meet the requirement of local residents. Taking Zhongwei city of Ningxia province as study area, the energy saving construction system for solar...

A ternary compound Er10Ga3Si3 was synthesized and studied by means of X-ray powder diffraction technique using Rietveld methods. The ternary compound Er10Ga3Si3 crystallizes in the hexagonal structure, space group P63/mcm (N0.193) with the Mn5Si3 structure type and lattice parameters a= 8.3595(1) , c=6.3095(1)...

This paper applies the attribute mathematics theory to prefabricated building construction safety evaluation, establishes the attribute mathematics model of prefabricated building construction safety evaluation. Based on the analysis of main causes of prefabricated building construction safety, personnel...

Glass curtain wall has received widespread attention because of architectural aesthetics that people persistent pursuit. But using glass curtain wall can bring the sharp increase of building energy consumption. For today's situation of energy scarcity, it is important to find a way to improve energy...

Biogas slurry as an inevitable outcome of biogas project contains a lot of nutrients such as nitrogen and phosphorus. In order to solve the difficulties in storage of biogas slurry and recycle the nutrients, phosphorus from simulated biogas slurry was concentrated by reverse osmosis membrane. Economic...

The paper aims to employ emerging technologies to recycle the abandoned mining pits, and build urban complex to recycle the space, thus improving the local natural environment and creating a livable environment. The paper intends to explore the direction of urban construction in the future.

The structural and optical properties of lead-free Barium strontium titanate Ba0.5Sr0.5TiO3 with oxygen vacancies (BST-O) were investigated by first-principles calculations of density functional theory. The results show that the O vacancy has significant influence on the electronic structure and optical...

Co-digestion is becoming an important method to increase specific biogas production. Co-digestion of cow manure with corn straw was investigated and optimized in this study, and the influence of vegetable residues additive on co-digestion was explored preliminarily. The research was divided into two...

Due to the lack of theoretical basis for the design of inverted arch, the inverted arch design of many tunnels is not reasonable, and the problem is more prominent in the design of the shallow buried tunnel. By analyzing the relationship between the soft foundation and the stability of tunnel structure,...

Currently, advanced support technology of leading pipe –shed is often used in the excavation of the portal section, but the design parameters of leading pipe –shed and the support structure haven’t yet form a unified standard. The author analyzes its force theory and design parameters. Combined with...

Most existing Application layer multicast (ALM) solutions use a tree structure to deliver the multicast data. However, the data distribution of tree-based ALM is unreliable because of group members’ dynamics and the error correlation of the ALM tree. In this paper, we propose a SDN-like loss recovery...

Since the outbreak of pandemics, acute hemorrhagic conjunctivitis (AHC) has caused extensive attention in the field of public health. The purpose of this study was to quantitatively evaluate the influences of super spreader, passenger source and social relation structure on the AHC transmission in terminal....

This paper introduced fingerprint recognition to protect USB Key’s pin number. Pin number is easily stolen and sometimes it’s too hard to keep in mind. To overcome these problems, a fingerprint key based USB Key pin number protection system has been proposed. Using biometric like fingerprint to protect...

Cooperative Road Hazard Warning (C-RHW) is an event-driven and active road safety application and is performed through direct V2V/I2V communications. Whether or not a C-RHW application could work well is much dependent on the application-working pattern, the current spatial-temporal relation with the...

This paper is mainly design of alcohol concentration detector. Single chip microcomputer STC89C52 is employed to process data and control logic. Alcohol concentration sensor MQ-3 as its core detection device, which test the ethanol vapor concentration in the air. AD converter ADC0832 as auxiliary chips,...

In terms of existing time series clustering method based on Euclidean distance metric, with the increasing dimension of time series, the time complexity of the algorithm will be increased too; and this method can also lead to incorrect clustering result because of it unable to recognize the abnormal...

In order to improve the information management level in the process of automobile tire tread production, the actual condition for the tire production process is analyzed in this paper. The information management system of the extruding line in the process of automobile tire tread manufacturing is designed...

In order to realize the automatic measurement of total sugar content in the process of chlortetracycline (CTC) fermentation and optimize the carbohydrate supplement adjustment process, we designed the digital signal processor TMS320F2812 as the core of automatic measurement controller. The functions...

BP Algorithm, as a well-known training method for artificial neural network, has been widely used in all the main fields of science and engineering. However, owing to the overwhelming dependency on gradient of loss function, BP-ANN still suffers several drawbacks, for example, the training process is...

As one of the effective ways to mitigate earthquake hazards, earthquake early warning (EEW) has been studies by many countries and regions around the world and significant mitigation effectiveness has been achieved during practical application. However, the data format for real-time data transmission...

IPv6 backbone Network has been deployed in 2004 in China, such as CNGI, but the main IPv6 network equipment was provided by foreign supplies. Although we are facing the danger of IPv4 addresses exhaustion, but IPv6 Customer Premise Network was not deployed widely, and the applications based on IPv6 Network...

The paper analyses the construction model of enterprise information systems (EIS), and puts forward a layering and service-oriented integrated framework. The paper expounds that the major function and realization model from four aspects of data, component, service, and portal integration, which provides...

In this paper, we study Moving Checkers Game, an interesting shifting checkers game consisting of n black checkers and 1 white checkers. We have proved that the minimum number of steps needed to play the game for general n is 2n+1. We have also presented an optimal algorithm to generate all of the optimal...

Along with the socio-economic development, more high living standards have being pursued by human beings. However, more time has been spent engaging in work and they have no extra time to look after their playthings (e.g., fishes, flowers). The primary objective is to design a smart monitoring and control...

Image is main source for human to acquire information,therefore,accuracy of image information is very important.In real life,due to the reasons of haze in the image,which we have obtained is degraded.The degraded image not only reduces the application value of image,but also brings many negative influences...

Among various attacks against watermarking security, copy attack can embezzle other people’s copyright information, which brings challenge to copyright protection of digital works. In this paper, a new watermarking algorithm based on information layer encryption is proposed. This algorithm uses two keys...

With the rapid development of modern information technology, more and more people believe that the protection of hardware equipment must be enhanced in order to improve the security capabilities of computer information systems better. Trusted computing improve the trustworthiness of system through the...

In this paper, Optimization problem is introduced. Some computer tool-kits used to solve optimization problems are outlined with their respective strength and weakness. A state of the art optimization programming language-IBM ILOG OPL is presented. This high level OPL facilitates modeling and solving...

Based on actual demand of the bell system, this visual intelligent doorbell system was designed and implemented to be a high reliability, good performance and low cost embedded bell system combined with the embedded technology, image processing technology, image transmission technology, Zigbee technology...

According to the problem that the intelligence is not high of the soccer robot, using the mechanical theory as a guide, making some mechanical analyses and calculations on the pressure and transmutation states of chip kick mechanics, and conducting optimal design too, then making the structure of chip...

To solve the problem that many test points are needed in radar antenna servo system when fault diagnosis is needed for this system, a new test points selection method based on Particle Swarm Optimization algorithm is researched. Test points selection is a many-target optimization problem which could...

order to improve the reliability of aviation electronic sub-system in UAV, the analysis method based on Failure Mode and Effects Analysis (FMEA) is put forward. The risk factors and correction measurement feasibility parameters are quantified with fuzzy theory. Then the fault modes with higher risk priority...

This paper analyzes the benefits and limitations of several attendance systems that have been used in universities and describes the design of an Attendance System which combines the attendance recording and dormitory management. The system described in this paper is based on MySQL and featured by synergetic,...

Study on the ground target recognition for radar on multiple platforms based on SAR has been perfected gradually, however in view of the radar on missile platform, its velocity is high, and its trajectory is limited, using HRRP has advantages of strong real-time, low computational complexity compared...

Oriented at the actual application demands of the remote control with the information security equipment, this paper proposed an information security equipment structure supporting remote control, the workflow and the functional structure of the equipment module are introduced. The structure is compatible...

Noise control of signals is a key challenge problem in signal enhancement, signal recognition, communication, radar, and sonar applications. The most widely used method is adaptive linear filtering method, which can adaptive change filter parameters with the stochastic property of the stationary Gaussian...

Inventory inaccuracy is common in the modern supply chain and it attracts much attention from many researchers. This paper considers a supply chain with inventory shrinkage and misplacement, and the supply chain consists of a single supplier and multiple retailers who are engaged in both price and inventory...

A harmonic reducer is a kind of gear transmission with high performance, as the servo mechanism with a harmonic reducer is widely used in the fields such as aviation and aerospace. For meeting the more higher precision of the servo mechanism, according to the operation principle and the configuration...

In the industry, the damage detection of stayed cable is an important research subject. A proper method for the vibration signal processing is indispensable. The Hilbert-Huang Transform (HHT), which has been successfully applied to many different fields in the last ten years, may provide a promising...

An analytical solution based on slab method is first proposed to calculate the rolling force and rolling torque in asymmetrical sheet rolling where the work roll radii, their speeds, and the interfacial frictions may be different. In the solution, the shear stress acting along the vertical sides of each...

DNA methylation is an important epigenetic modification mechanism, interacting with histone modification, changing the structure of chromatin and regulating gene expression. Meanwhile, there is a close relationship with cell proliferation, aging, cancer and other life phenomena. DNA methylation includes...

In the 21st century, ever increasing energy and environmental problems such as pollution, fossil fuel depletion and global warming are ringing the alarm bell to human society. Therefore, clean and renewable energy materials as well as their devices are urgently demanded. In this paper we first give the...

The US Navy Product Data Standard defines a set of requirements for an effective IPDE, focusing primarily on the traditional data management capabilities and interfaces with CAD/CAM/CAE/CAO, PDM, ERP and catalog systems used for the design, construction and in-service support of Navy ships. The purpose...

The exhaust flue gas cooler in a 300MW oxy-coal fired boiler is taken as an object of study. The simulation model of the cooler was established by the method of lumped parameter. The change rule of the exhaust flue gas cooler parameters and the flue gas thermal physical property parameters were analyzed...

The flue gas compression system in a 300MW oxy-coal fired boiler unit is taken as an object of study. By the leakage test of quad-section rotary gas-gas preheater on B-MCR condition, the influence from the leakage on the operation parameters of the flue gas compression system were analyzed. The results...

It studies the optimization model of medicine-chest design. Given four different conditions of the medicine-chest design, it sets up a corresponding nonlinear, double objective optimization model to realize medicine-chest design.

There is a problem of poor cementing quality at the overlay segment of the liner hanger in the conventional liner hanger cementing and it can be solved by the technique of expandable liner hanger which adopts the steel tube expansion and the high strength rubber materials as the hermetic hanging mechanism;...

In this article, Wireless Ad hoc Networks and routing classification are briefly presented and ZRP Routing Protocols are analyzed. In large wireless Ad hoc networks, ZRP routing protocol takes long time to find routing path. It puts forward the improved routing protocol IZRP. This protocol uses the Beidou...

In this paper, from the experimental teaching, to describe the process of timing signal produce in the micro-program controller, and using Altera Quartus that is integrated development platform to validation logic functions. By the simulation design, you can see the design effect visually, to get a ring-pulse...

Ultra Wideband (UWB: Ultra-Wideband) with high spatial resolution and positioning measurement, has the ability of suppressing the multi-path effect and penetration loss medium. It contains abundant target information in the received signal. The compressed sensing theory is introduced into the imaging...

Multicast is an important communication way, which addresses how to distribute the data from one or many sources to a group of destination computers simultaneously. Recently emerging software-defined networking (SDN) separates the network control plane from the data forwarding plane with the promise...

Accurate endpoint detection is crucial for speech recognition accuracy. This paper presents a new technique for speech endpoint detection in a noisy environment based on the empirical mode decomposition (EMD) algorithm and higher order statistics. With the EMD, the noise speech signals can be decomposed...

First, the algorithm converts 3d models into an affine invariant space, in order to obtain rotation in-variance and scale in-variance of the model; then we transform the distance of the grid point to the center to a signal in frequency domain using one-dimensional DFT. We embed a watermark into the signal...