bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Study of Marangoni Convection around a Single Vapor Bubble during Pool Boiling
Authors: Xu Chun Long , Shi Yong Chao , Jin Xiao Xing , Lei Zuo Sheng , Zhong Yun Bo , Guo Jia Hong
Published: August 2014

Boiling is known to be a very efficient mode of heat transfer in earth gravity, however, in microgravity bubble behavior is different because the buoyancy effects are replaced by surface tension effects such as Marangoni convection. The modeling of nucleate boiling with the effect of Marangoni convection in 0 g is accomplished by using Phase Field Method. Numerical simulation is carried out of single nucleating vapor bubble on a heated wall with and without Marangoni convection. The results show that the flow field consists of a major vortex that recirculates colder fluid from the upper region, pulling it toward the hot surface to the point where the bubble meets the heated surface. This type of flow pattern has been observed in various experiments.
Structural Design and Finite-Element Analysis of Packing Seal with Self-Adaption and Resilience
Authors: Liu Peng , Zeng Tao , Xie Jun Ke , Qi Fu Ji
Published: August 2014

For lack of structure rigidity foundation and radial force diminishing exponentially with the distance of gland, a newly packing sealing structure with opening and hollow metal ring supporting is designed. Through finite element analysis, it comes out that the disadvantages are divided adding effect of high pressure resistant. The radial force is increased,preload is reduced, and the mechanical seals can be replaced under certain condition.
Vehicle Dynamics Modeling Based on Vortex
Authors: Jin Ting , Gong Yun Qiu , Wei Chun Yu
Published: August 2014

The six degrees of freedom platform in vehicle driving simiulator simulates vehicle motion based on the calculation results of the dynamics model, so good dynamics model is the basis and prerequisite of simulator’s good performance. This paper describes the process of applying the Vortex software to establish vehicle dynamics model and focuses on the problem of damping matching in the vehicle suspension system based on the ride comfort and stability.
SAR Image Recognition via Local Gradient Ratio Pattern
Authors: Yuan Xiao , Tang Tao , Xiang De Liang , Su Yi
Published: August 2014

Synthetic Aperture Radar recognition is a non-trivial problem. New features of SAR image are proposed. Based on the gradient ratio pattern for each pixel, the Local Gradient Ratio Pattern Histogram is then computed. Next, multi-scale LGRPH is constructed for dimensionality reduction. Finally, the similarity is obtained by utilizing K-L discrepancy to measure the distance of MLGRPH. The proposed method is theoretically proved to be insensitive to speckle noise, and the adaptability to local gradient variation is also discussed. Experimental results show that the proposed approach performs well.
The Research on Underground Millimeter-Wave Detection System
Authors: Ma Ming Xiao , Liu Hao Yu , Shao Qiang
Published: August 2014

This paper puts forward a safety inspection system for the security issues of miners carry contraband under well. This paper give the composition block diagram of the underground millimeter-wave detection system, and design the data acquisition module, present a design scheme and give the work flowchart.
Design of Fitness Device with Power Generation and Multi-Function
Authors: Qiu Hai Fei , He Jin Wei , Gu Long
Published: August 2014

In this paper, a fitness device which could generate electricity was designed into rod group structure based on theoretical calculation and experiment. The device could make mechanical energy into electrical energy in process of fitness, and the storage power could used to daily life lighting and small household electrical appliances power. Physical prototype of the device was developed successfully, the actual test results show that, the safe load of the device was 100kg, the charging voltage was 5V and 12V. People could generated available energy in process of fitness, positivity of fitness for people were removed, in results, the device contained certain practical value of popularization.
The Design of Multiplier in Integrated Circuit Based on Low-Power Algorithm
Authors: Zhou Duo
Published: August 2014

With rapid development of integrated circuit technologies, power consumption has been a key factor for long time, beside speed and area. Currently, in order to obtain the optimal low power result, we try to reduce system power consumption in each stage of integrated circuit design. Base on the traditional methodologies, a dual optimization methodology is developed, which reduces not only the number of addition operations, but also the width of one multiplier. From implementation point of view, the result of first optimization can be used for the second one, such implementation save the computation effort of second optimization, and promote operation speed and efficiency of whole methodology. The dissertation develop the low power technique for multipliers in different stages, it has reference value to integrated circuit front-end low power design for fixed coefficient multipliers.
Design Methodology of ALU Based on Resource-Sharing
Authors: Gao Da Rong , Geng Yu Ru
Published: August 2014

In combination with ALU design, this paper proposes a design method based on the sharing of resources equivalent transformation. Based on the analysis of a resource-shared ALU design example, an ALU function is presented. Compared with method based on the instruction function design, the resource sharing design methods have unique advantages in terms of saving resources. The design method is not suitable for modern HDL-based design method described herein, but also to the schematic design of a conventional method.
Research of Novel Phosphor Membrane Packaging Technology for LED Illuminant
Authors: Liu Rui Heng , Liang Chao , Li Shu Ya
Published: August 2014

A ultra-thin phosphors membrane which realized a good matching of the SMD bracket was prepared by the silk screen printing technology, and the white LED illuminant with the ultra-thin phosphors membrane had a significant advantage over the traditional packing production. The experiment results indicated that the white LED of conventional color rendering index made by membrane packing technology had the same luminous efficiency with the standard sample, while it had an obvious advantage in luminous decay. In 3000 hours, the luminous decay of the white LED illuminant made by membrane packing technology was less than 2%, better than the standard sample with the luminous decay of 3%. The luminous efficiency of the high color rendering index white LED illuminant made by membrane packing technology was higher about 3% than the standard sample; also the luminous decay performance was outstanding.
The Research of Model-Driven Architecture in the Embedded System
Authors: Huang Jin
Published: August 2014

Model Driven Architecture (MDA) as a software independent of the specific platform and software suppliers architecture design and development methodology has been great concern. The system is expanding at the same time, in order to solve the high reliability of embedded software development code, real-time, and the resulting system efficiency of the implementation issues, the paper used in the field of embedded software development according to MDA, and achieved good results. And this research work is summarized and analyzed, pointing out the challenges facing the sector and future research work.
Research on Routing Protocol for Wireless Sensor Network
Authors: Zhang Yong , Pan Hong
Published: August 2014

With the rapid development of computer technology,wireless sensor network (WSN) is widely used in many fields of society, This paper introduces the characteristics of wireless sensor network and its routing protocol. Based on the hierarchical model, a dynamic selection of the sink node and the hierarchical model of multipath routing protocol is proposed which can balance the energy consumption of nodes, and it also can prolong the network lifetime, improve the data transfer rate.
Fuzzy C-Means Image Segmentation Algorithm Based on Chaotic Simulated Annealing
Authors: Yang Qing , Wang Zhi Qiang , Xu Yan
Published: August 2014

Considering the problem that the traditional fuzzy c-means (FCM) image segmentation algorithm is often caught in a specific range in local search and fails to get the globally optimal solution, this paper proposed a modified FCM algorithm based on chaotic simulated annealing (CSA). It traverse all the states without repetition within a certain range to calculate the optimal solution. Experimental results show that our method converges more quickly and accurately to the global optimal and proves a promise global optimization method of high adaptability and feasibility.
Design of Infrared Communication System Based on Phase-Locked Loop Frequency Modulation
Authors: Wang Jun , Feng Shuo
Published: August 2014

The paper introduces a system using PLL frequency modulation and demodulation technique, and using infrared as the carrier to realize wireless communication. CD4046 is a common CMOS low-frequency phase locked loopintegrated circuit, and it has the characteristics of high VCOlinearity, tunable center frequency and acquisition frequency range, low power consumption and simple for use. The paper introduces the design scheme using the technique for infrared communication, and proposes a method using sing-chip microcontroller to control single channel to realize the simultaneous transmission of acoustic signal and digital signal, which has great practicability.
Study on Path Optimization Method of Traffic Guidance System under the Condition of the Car Networking
Authors: Wang Dan Ping , Hu Kun Yuan
Published: August 2014

Intelligent Transportation System is the primary means of solving the city traffic problem. The information technology, the communication, the electronic control technology and the system integration technology and so on applies effectively in the transportation system by researching rationale model, thus establishes real-time, accurate, the highly effective traffic management system plays the role in the wide range. Traffic flow guidance system is one of cores of Intelligent Transportation Systems. It is based on modern technologies, such as computer, communication network, and so on. Supplying the most superior travel way and the real-time transportation information according to the beginning and ending point of the journey. The journey can promptly understand in the transportation status of road network according to the guidance system, then choosing the best route to reach destination.
Application of Cubic Spline Interpolation Method for Track Profile Irregularity Adjustment
Authors: Tao Jia Yuan , Xu Yu De
Published: August 2014

To solve the problem that there is vertical track profile irregularity with long wavelength and large amplitude a method of adjustment based on cubic spline interpolation was proposed in this paper. The key step of the method is to set up reference sleepers. This paper made an adjustment scheme for a 500-meter-long ballastless track section as an application case. An evaluation for the scheme was done by considering the evaluation indexes of regularity indexes, rail curvature and vehicle-track system dynamic responses. The evaluation result indicates that the method based on cubic spline interpolation is effective on track profile irregularity adjustment.
The Deflection of Orthotropic Saddle Membrane under the Snow Load
Authors: Zeng Hong , Zhang Yin Hui , Long Jun
Published: August 2014

This paper reviews the research on the deflection of orthotropic saddle membrane under the external snow load. First the authors build the model of orthotropic saddle membrane under the snow load. Second we deduce the equations set of the saddle membrane which has the effect of pretension. Then we solve the equations set with the perturbation method. So we obtain the relational expression between the maximum deflection of the membrane’s centre point and the external load. At last, suppose that the load was determinate, the authors analyze the change of the deflection of the centre point of the membrane with different pretensions, side lengths and other parameters.
Design of a New Flexometer for the Safety Monitoring System of Bridge
Authors: Cao Hong Mei
Published: August 2014

Large span bridges are very important infrastructure of the nations. The enormous investment and significance in state economy make them get more and more recognition. At present, the technology of the safety monitoring of bridges is becoming a hotspot in both academic and engineering field. Now, safety monitoring systems of the structures have been applied to many large bridges in the world. Among all these parameters which can indicate the safety status of bridges, the deflection is indispensable. Although there are lots of sensors now used to measure the degrees of the deflection, it is still very scarce that the sensors can be made for long-distance, real-time and automatic online completely. The photo-electricity and liquid level deflection sensors (PLLD) introduced here are cheaper and of better-automaticity and higher precision and can work online continuously without contact. This paper will show the structure, performance and theory of our new sensor based on ARM7 in detail. In the end, a concrete application instance in XiaoGou bridge of ShanXi province will be given.
A Novel Fracturing Fluid System with Ultra-Low Concentration and High Temperature Resistant
Authors: Wang Chao , Ouyang Jian , Zhu Zhuo Yan
Published: August 2014

According to the low permeability reservoir, fracturing transformation has some requirements on fracturing fluid system with low cost, low damage, and high temperature resistant. First of all, we are able to begin from the concentration of thickener and cross-linking system and then see Synthesis of high temperature resistant polymers as thickening agent. In addition, Non metal ion compounds are introduced as cross-linking agent. Moreover, we will have a performance evaluation on the fracturing fluid system which has been formed, obtaining the best receipe with ultra low concentration and high temperature resistance (calculate according to the mass concentration ):0.075% thickener agent +0.015%pH value regulator +0.25% cross-linking agent +0.01% coagulant +0.4% cleanup agent. This fracturing fluid system has a lot of excellent characteristics such as low density, low cost, low residue, low fluid loss, no metal ion and so on . It also cuts down the use-cost of fracturing fluid and reduces the damage to the Stratum towards which fracturing fluid has. The favorable Cross-linking system fill the gap that we use the non metal ion as cross-linking agent in our present fracturing fluid system at home and abroad.
Accounting Information Systems Development (Subsystems: Production Process in XYZ Ltd)
Authors: Kurniawan Yohannes , Hiererra Siti Elda
Published: August 2014

The aims of this research are to identify and to analyze the need of accounting information systems, including the processes, procedures, and also the documents which related to the production process in XYZ. Next step, We conduct designing accounting information systems which is useful to support current business process. Analysis and design the systems that we conducted, related to the organizational structure and current business processes. Its analysis and design systems based on the theories of accounting information systems, production process and also internal control. The result achieved is an application model, which can assist production process activities, especially in documenting and storing data transaction and also generating reports in accordance with organization’s needs. The conclusion is the implementation of the accounting information systems application which can improve the XYZ’s systems performance and the current business processes. Therefore, it can obtain the required information in a timely and accurately.
Effects of PMN Volume Fraction on the Damping Properties of 1-3 Piezoelectric Damping Composites
Authors: Guo Xiao Jing , Zhang Jin Sen , Xu Dong Yu , Xie Xin Chun , Sha Fei , Huang Shi Feng
Published: August 2014

1-3 piezoelectric-damping composites were fabricated using piezoelectric ceramic as functional filler and epoxy resin as matrix by cut-filling method. The fabrication procedure of the composites was introduced. The effect of ceramic volume fraction on the damping behavior and the piezoelectric strain factord33were studied. The results show that the damping property was firstly improved, and then decreased with the increase of the ceramic volume fraction. An optimal ceramic volume fraction of 15% was shown.TAincreased from 29.78 to 32.34. The piezoelectric strain factord33reached 323pC·N-1.
Research Status of Flexible Substrate Transparent Conductive
Authors: He Ping , Zhai Bo Li , Qiu Jing
Published: August 2014

This paper summarize the transparent conductive oxide (TCO) market application of aluminum doped most widely used in the film Zinc Oxide AZO and ITO thin films and the development trend is prospected. Reports the photoelectric properties of ITO films requirements, prepared on flexible substrate ZnO films on the substrates, preparation technology and development, summarizes the latest research achievements in this field and the present problems, which describes the next step of work in the domain.
Effect of Quenching Temperature and Medium on Properties of TiO2 Nanotube Arrays in DSSC
Authors: Zhang Chuan Xiang , Bao Zu Guo , Tao Hai Jun
Published: August 2014

TiO2nanotube arrays (TNAs) fabricated by anodization were quenched to obtain high-quality samples for the application of such electrodes in dye-sensitized solar cells (DSSC). The morphology, crystallization structure and photoelectrochemical properties of the samples were studied. The results showed that the quenched nanotubes assembled together into bundles but every single one maintained tubelike shape. In transient photocurrent response of electrode, photocurrent increased with the increasing of bias potential and photoelectrochemical properties of quenched electrodes were better than the unquenched, displaying obvious characterization of slow current response. When applied in DSSC, the sample quenched at-100 °C in ethanol displayed the best performance with Jsc= 4.186 mA/cm2, Voc= 0.781 V, FF = 0.48, η = 1.569 %.
Interaction Study of Carbide Precipitation and Impurity Segregation under Temper Embrittlement Conditions in a Coarse-Grained Heat-Affected Zone in Q690 Steel
Authors: Li Zhen Shun , Li Sheng Li , Zhang Xiang Hai , Liu Ji Zhi
Published: August 2014

This work studied the interaction between carbide precipitation and impurity segregation under temper embrittlement (TE) conditions in a coarse-grained heat-affected zone (CGHAZ) in Q690 steel, a low-alloy high-strength structural steel used in the hydraulic support in the fully-mechanized mining face. From the perspective of carbide precipitation, through thermodynamics calculation and analysis, it was found that the existence of cementite at the grain boundaries was preceded by impurities segregation (primarily phosphorus). The precedent phosphorus segregation thus enhances the nucleation rate of cementite at the grain boundaries by lowering the ferrite/cementite interfacial energy. Both carbide precipitation and impurity segregation at the grain boundaries reached a maximum as a result of their mutual role in the temperature range of TE.
Effect of Y and Heat Treatment on Microstructure and Deformation Performance of ZK60 Alloy
Authors: Li Quan , Yang Jin , Liu Wen Jun , Luo Su Qin , Cheng Ren Ju , Li Cheng , Jiang Xian Quan , Pan Fu Sheng
Published: August 2014

The ZK60 magnesium alloys add Y were deformed with extrusion simulation system, and extruded products for various heat treatment processes. The mechanism properties of Y element in ZK60 and its effect on microstructure were analyzed. as well as heat treatment process for ZK60 and ZK60 +1.0Y two influence of alloy microstructure and properties were investigated. The results showed that the addition of rare earth Y can effectively refine the grain ZK60 alloy, and can significantly improve the performance of ZK60 alloy plasticity. Artificial aging treatment can improve ZK60 and ZK60 +1.0Y alloy yield strength and ductility, the best artificial aging treatment ZK60 and ZK60 +1.0Y alloy extrusion products for the 180°C×24h.
Effect of Intercritical Hardening on Properties of 60Si2Mn Steel
Authors: He Bin Feng
Published: August 2014

Effect of subcritical quenching on austenite crystal and the degree of hardness of 60Si2Mn steel were studied by experiment. The results show that non-dissolved ferrolites inhibited austenite’s growth, so grains of 60Si2Mn steel after intercritical hardening was thinner than conventional quenching. With the elongation of holding time the grain size grown up, and the hardness decreased sharply, and the optimum holding time is 0.5h. What’s more, the temperature made a sharply effect to the hardness of 60Si2Mn steel when the holding time is 0.5h, and the optimum temperature is 820°C.
Feasibility Study of Concrete Production Using Sea Sand Wased by Reclaimed Water
Authors: Zhang Wei
Published: August 2014

This paper presents the use of water to wash sand approach can effectively achieve the purpose of washing sand chloride. Desalination of sea sand after a qualified construction sand, and the production process is simple, has a price advantage, saving fresh water resources, use as a building material has good prospects.
Study of Characterization Methods on the Particle Size of SMG
Authors: Ye Yin Zhu , Wu Xing Cai , Wang Zheng Bo , Shao Li Ming , Zeng Zhi Hui
Published: August 2014

Soft moveable gel (SMG) is a new kind of deep profile control microgels used in many oilfields. SMG has many advantages of high temperature, salt tolerance, shear resistance, controllable grain size, good control and oil displacement effect. The SMG deep profile control technique can remarkably improve oil recovery of the high temperature and high salinity oilfields. While the successful applications of SMG deep profile control technique are greatly decided by the size matching ability between SMG microgels micelle particles and reservoir pore throat. Therefore, three different experimental methods such as microscope, SEM analysis, and laser scattering method are used for particle characterization at first. Based on that, the new method utilizing near-infrared spectroscopy is innovated and developed. The method has the advantages of non-destructive measurement of original state, convenient, accurate and reliable results etc.. Finally, three levels of SMG particle size entitled by nanometer, micron, and sub-millimeter are systematically evaluated. The results show the sizes are 0.06, 21.37, about 39.24 μm respectively in the new method. Different particle size of SMG can be applied in deep profile control of high, medium or low permeability reservoirs correspondingly with high temperature and high salinity.
Removal of Coal-Fired Pollutants Using a Novel Composite Collector in a Wet Electrostatic Precipitator
Authors: Zhao Jian , Chang Jing Cai , Song Jia Qiu , Tao Ai Ping , Gao Ming Feng
Published: August 2014

Rigorous new regulations in coal-fired pollutants emissions from power plant strengthen the requirements for electrostatic precipitator (ESP) technology. The study was inspired by the requirement to use the new composite collectors as substitutes for typical steel collector to save energy and structural materials. A bench scale and a pilot scale experimental system have been set up to investigate the performance of the novel wet composite collector. Contrastive collection efficiencies of different assembled modes were investigated. The removals of coal-fired pollutants including acid aerosol, ammonia aerosol, slurry droplets and fine particles were performed in new wet ESP, as well as to quantify the key properties of the new wet ESP. The results show that the collection efficiency of the new composite collector was higher than that by typical collectors using a thimbleful of water penetrating the surface via capillary flow. The new wet ESP device acts in synergy with WFGD and SCR systems for controlling coal-fired pollutants emissions and solves the adverse impacts caused by wet flue gas desulfurization (WFGD) and selective catalytic reduction (SCR) systems at the same time.
The Influence of Nano-Montmorillonite on High Temperature Performance of Asphalt
Authors: Zhang Zeng Ping , Wu Xing Jiao , Nan Xiao Fen , Jia Meng , Han Ji Cheng
Published: August 2014

In order to increase the life of bituminous pavement, quality of bitumen needs to be enhanced and modified. Different dosages of nano-organic montmorillonite (nano-OMMT) were used as modifier for base asphalt. The effect of the contents of nano-OMMT on high temperature performance of asphalt was investigated. Experimental results showed that with the increase of nano-OMMT of content, the high temperature performance of asphalt was gradually improved. And the high temperature sensitivity of asphalt is also enhanced. The nano-OMMT modified asphalt is expected to possess superior rutting resistance to the base asphalt.
Preliminary Research on One Multiband Smoke Material Preparation
Authors: Xu Wei Dong , Liu Heng , Zhang Sha Shi , Wu Jiang Hua , Zhu Jin Song
Published: August 2014

Precision guided weapons (PGWs) have valuable application in field warfare. In order to interfere with Laser, Thermal Infrared (TIR) and Television guidance, this paper intends to research and develop a smoke-generating material that is capable of shielding visible lights, TIR and Millimeter Wave (MMW), based on the attenuation characteristic of expandable graphite to IR and MMW. The formulation is studied by orthogonal design, camouflage effect is verified by experiment, and the material with multiband interfering capacity is preliminarily prepared.
Effect of Low-Temperature Plasma Treatment on Surface Properties of LDPE Film
Authors: Meng Jiang Yan , Wang Yun Ying
Published: August 2014

Low-density polyethylene (LDPE) film was treated by low-temperature plasma. Scanning electronic microscope, electronic universal testing machine, contact angle/interfacial tension measuring instrument were used to analyze the surface morphology, surface contact angle, bonding strength and performance of LDPE film before and after they were treated by low-temperature plasma. The results show that air ambience is more appropriate than N2, CO2 for treatment. Specifically, plasma treatment in air ambience, under conditions of 44 W (power), 30 s (duration) and 60 Pa (vacuum degree), can decline static contact angle of LDPE film from 101° to 13.5°. The transiency of plasma-treated LDPE film is so obvious that storage time of longer than one hour will result in a contact angle up to 74° and loss of plasma treatment effect (timeliness). Therefore, the reversible plasma-treated LDPE film should be processed immediately.
Analysis of the Flow Velocity of Heavy Oil Reservoir Flooding Vent Complex Process
Authors: Geng Jia Mei
Published: August 2014

With the deepening of the degree of oil exploration and development, as well as the rapid growth of world demand for oil, heavy oil reservoir development is becoming increasingly important in the position in oil exploration. For reserves a great deal of ultra heavy oil reservoir at present, conventional thermal recovery technology is difficult to obtain a good development effect. In this study we use computational fluid dynamics software ANYSY CFX to analyze the impact of horizontal and vertical pressure gradient on the seepage velocity difference..
Preparation of Medical Low-Temperature Wood-Plastic Polycaprolactone Composites and their Properties
Authors: Zou Ting Song , Huang Yue Shan , Zeng Wei Jie , Lao Yong Hua
Published: August 2014

Traditional medical external fixation material represented by gypsum is brittle, heavy and prone to adverse reactions, clinical effect is not ideal. The pine wood fiber particles (size for 10 ~ 40 mesh) and polycaprolactone (PCL) are used to prepare a new kind of wood-plastic polycaprolactone composites (WPC) by the blending method. The experimental results show that the increase of PCL mass ratio can enhance the material strength and flexibility, especially the match force between the pine wood fiber particles. Meanwhile, when the mass ratio of PCL reached 65%, this enhancement effect significantly diminished; after the mass ratio of PCL reached 70%, the phenomenon of material mechanics performance decline. In this paper, the prepared WPC, which can soften under temperature 50°Cand repetitively finalize the design, have good mechanical properties, low-temperature thermoplastic and environment protection.
Electrospun PLGA/SF Modified with Electrosprayed Microparticles: A Novel Biomimetic Composite Scaffold for Vascular Tissue Engineering
Authors: Yu Li , Hao Xue Fang , Li Qian , Shi Chang Can , Feng Ya Kai
Published: August 2014

Here, a novel biomimetic scaffold with controlled diameters and mechanical properties was prepared from negatively charged silk fiber (SF) and poly (lactide-co-glycolide) (PLGA) by electrospinning technique. The fiber diameters and mechanical properties of the scaffolds were controlled by varying the weight ratio of PLGA/SF. Furthermore, in order to promote endothelialization on the scaffolds, pEGFP-ZNF580 loaded microparticles (MPs) were used to modify the surface of the electrospun scaffolds via electrospraying technique. Results showed that the composite scaffolds with these MPs could promote proliferation and migration of EA.hy926 cells significantly.
Atomistic Simulation of the Self-Diffusion in Very Thin Cu (001) Film by Using MAEAM
Authors: Wen Yan Ni , Fang Xiao Bin , Jia Xiao Fei
Published: August 2014

The self-diffusion in very thin Cu (001) film that formed by 2~11 atomic layers have been studied by using modified analytic embedded atom method (MAEAM) and a molecular dynamic (MD) simulation. The vacancy formation is the most easily in of Cu (001) thin film formed by any layers. The vacancy formation energy 0.5054eV in of the Cu (001) thin film formed by layers is the highest in all the values in the ones that formed by layers. The vacancy in and 3 is easily migrated to layer, and the vacancy in is easily migrated in intra-layer, and the vacancy in is easily migrated to when the corresponding atomic layer is existed. The vacancy formation and diffusion will not be affected by the atomic layer when the Cu (001) thin film is formed by more than ten layers ().
Preparation of Chitosan-Diatomite Adsorbent and Adsorption to Cu(II) in Waste Water
Authors: Li Zeng Xin , Zhou Xu Yi , Kuang Tang Bin , Tian Zhong He , Liang Qiang
Published: August 2014

The chitosan with the deacetylated degree 95%was mixed with the diatomite in the mass ratio of one chitosan to one point two diatomite to prepare the solid adsorbent for the sorption of the copper wastewater, which was based on the abilities of diatomite to adsorb cations and chitosan to chelate with metal ions. The absorbance of copper ions that were adsorbed before or after the adsorption can be measured at wavelength of 600nm by using spectrophotometer model 722, and both of the adsorption efficiency and capacity can be calculated then. The parameters to influence the adsorption of copper were studied under such conditions as different pH, concentrations, sizes, the sorption temperature and the sorption time. The results show that the adsorption efficiency can reach to 84.3% for 1L copper solution of concentration 0.8mol/L when 1g adsorbents are used at 27°C ,the value of the pH 6 and the sorption time for 1 hour. The cost of the adsorbent is low and it not only could be used to control the pollution of industrial copper wastewater but also provides references to the treatment of other heavy metal wastewater.
Stable and Metastable Phase Equilibria of the Lithium-Containing Salt-Water Systems
Authors: Li Long , Gao Dao Lin , Zeng Jiang Ping , Guo Ya Fei , Deng Tian Long
Published: August 2014

Salt lake brine resource is one of the strategic resources in the western of China. Phase equilibria and phase diagrams are the theoretic foundation for the exploitation of salt lake brine resources. Hence, studies for the stable and metastable phase equilibria of lithium-containing salt-water systems are of the great importance for the development of salt lake brine resources. In this paper, the stable and metastable phase equilibria of lithium-containing salt-water systems were summarized, and the problems existed at present and the new trends in the future are also discussed.
Phase Equilibria of the Aqueous Systems Containing Magnesium and Borate Ions
Authors: Han Xu Nian , Zhao Mei Ling , Wang Shi Qiang , Guo Ya Fei , Deng Tian Long
Published: August 2014

It is well known that the comprehensive utilization of salt lake resources can not only create a good economic benefit, but also effectively protect ecological environment of salt lake and achieve sustainable development. After potassium separating for potassium fertilizer from salt lakes, the rest of mother liquor brines are rich resources of magnesium and boron. Research on phase equilibria of salt-water systems containing magnesium and borate can provide reference data for comprehensive development and utilization of salt lake resources.
The Influence of Donor-Doped Content on PTC Effect of Ba-Excess BaTiO3 Based Ceramics Fired in Reducing Atmosphere
Authors: Cheng Xu Xin , Cui Hai Ning , Zhou Dong Xiang , Fu Qiu Yun
Published: August 2014

We investigated the influence of the Sm-doped contentration on the electrical properties and PTC effect of Ba-excess BaTiO3Based Ceramics, which were fired at 1300 °C for 30 min in a reducing atmosphere and then reoxidized at 850 °C for 1 h. The results showed that the donor dopant affected PTC characteristics and the electrical properties of the BSMT ceramics, whose room temperature resistivity first decreased and then increased with an increase in the Sm3+-doped content across the range from 0.1 to 0.5 mol%. The BSMT specimens exhibited a remarkable PTC effect, with a resistance jump greater by 2.7 orders of magnitude, along with a low room temperature resistivity of 128.6 Ω∙cm at the donor-doped content of 0.3 mol%. The influence of the donor dopant on the grain size of the as-fired samples has been also investigated.
Preparation Nano-Sized ZnO/Ag Particles and Photocatalytic Degradation of UDMH Wastewater
Authors: Jia Ying , He Ya Nan , Liang Feng Hao , Yuan Mei , Liu Tian Tian
Published: August 2014

Different morphologies of nanoZnO have been synthesized by hydrothermal method and ethanol-assisted hydrothermal method, the quantum yield has been improved by noble metal doping, and also the range of spectral absorption has been widened. Then the products are used in the photocatalytic process of UDMH waste water. It is found that the crystallite size of the products is about 41~46nm, the maximum degradation rates of ZnO/Ag are 92.7% under the ultraviolet light, and 80.2% under the sunlight. The variation of the photocatalytic middle-product under different light sources is analyzed and it is found that the middle-product is decomposed more quickly and throughly under sunlight.
Interfacial Wetting Behavior under Low-Density Ultrasonic Field and Solvent - Assisted Wet Condition
Authors: Li Y.L.
Published: August 2014

In this paper, the author had adopted the low-density ultrasonic field coupling method, coupled the ultrasonic directional beam to metallic melt, and then coupled energy to C/Al interface by sound propagation, eventually accomplish C/Al interfacial wettability and interfacial reaction by using ultrasonic field coupling method, and synthesize Al-Ti-C master alloys by using the same method. Some experiments showed that in the low-density ultrasonic field and under flux auxiliary wetting, there is no explicit incubation period in the prophase of wetting, in the medium term of wetting, the wetting angle between aluminum melt and carbon will reduce with time extension, however, the wetting spreading radius will increase with the extended holding time, and reach wetting balance state in 20 minutes. In the condition of 1023K, the equilibrium wetting angle is less than 22°,and wetting spreading radius is close to 20mm.
The Influence of Donor-Doped Content on PTCR Effect of (Ba1-xSmx)TiO3 Based Ceramics Prepared by the Reduction Sintering-Reoxidation Method
Authors: Cheng Xu Xin , Zhao Zhao Xiong , Zhou Dong Xiang , Fu Qiu Yun
Published: August 2014

We investigated the effect of the donor-doped content on the positive temperature coefficient of resistivity (PTCR) of (Ba1-xSmx)TiO3(BST) Based Ceramics that were sintered at 1300 °C for 30 min in a reducing atmosphere and re-oxidized at 850 °C for 1 h. The results indicated that the resistance jump first increased and then decreased with an increase of the donor-doped concentration. Moreover, the specimens achieved a low room temperature resistivity of 383.1 Ω·cm at a donor-doped content and exhibited a pronounced PTCR characteristics with a resistance jump of 3.1 orders of magnitude. Furthermore, the RT reisistivity of the samples reduced and increased with the increasing of the donor-dopant content in the range of 0.1−0.5 mol% Sm3+. In addition, the effect of the Sm3+-doped concentration on the grain size of the ceramics was investigated in our paper.
First Principles Study on Adsorption for Different Concentration of H2S on Fe(100)
Authors: Zhang Qiang , Hu Ping Jun , Luo Qiang , Qiu Yi , Ran Zeng Ling
Published: August 2014

Using the first principles method, which is based on the density function theory (DFT), the structures and electronic properties for different concentration of H2S are adsorbed on the Fe (100) surface, and their molecular orbital and absorption energies were calculated with the generalized gradient approximation. The results show that, whether one or two molecules of H2S adsorpted Fe (100) surface, adsorption of single molecules Fe (100) surface partial density of states between pure Fe (100) and two molecules, and the total density of states is mainly composed of 3d electronic contribution.
Influence of Evaporation Temperature on the Morphology, Polymorph and Mechanical Properties of Poly(vinylidene fluoride) Solution-Cast Membranes
Authors: Liu Jie , Li Ji Ding , Lu Xiao Long
Published: August 2014

In this study, PVDF membranes were prepared by solution-cast method. The effects of evaporation temperature on the morphology, polymorph and mechanical properties of such prepared membranes were studied. It was found that perfect spherulites were observed in the solution-cast membranes. FESEM photomicrographs of the membranes showed dense structure. PVDF mainly crystallized into α phase. In the solution-cast process, the spherulite size increased as evaporation temperature was increased from 120 °C to 150 °C, when the evaporation temperature was 165 °C, spherulite size decreased. And the tensile strength increased with the decrease in spherulite size.
Research on the Effect of Calcined Mg/Al Layered Double Hydroxides on Fluoride in Water Based on Adsorption Kinetics Model
Authors: Guo Zi Xin
Published: August 2014

Calcined Mg/Al layered double hydroxide is called CLDH for short. It is one of lamellar compound which has been wildly applied in water treatment. Its structure is relatively complex and has a strong adsorption capacity for the fluoride in water. The basic structure is the charge-layered structure with memory function. This paper introduces the theory of partial differential equation into CLDH dynamic adsorption model and establishes partial differential equation of adsorption stress of CLDH and analyses experimental data through Matlab algorithm. In order to validate the validity and reliability of dynamic model and Matlab algorithm, this paper roasts LDH through experiments and obtains CLDH fluoride-adsorption capacity curves with different PH values ​​and different calcination temperature which provides a theoretical basis for the study of the ability of CLDH to remove fluoride ion in water.
The Respond Characteristic Property in Different Temperatures of SAW Sensor with p-tertbutylcalix[4]arene Coatings to Detect DMMP
Authors: Cao Bing Qing , Huang Qi Bin , Pan Yong , Qin Mo Lin
Published: August 2014

This paper presents new effective approachs for the supermolecule film deposition of surface acoustic wave (SAW) chemical sensors for detecting DMMP. 25-(thioalkyl-alkoxy)-p-tertbutylcalix [4] arene self-assembly molecular imprinted film as the sensitive film was coated on the gold delay line of SAW sensors to detect DMMP. The sensor has special response to organoosphorus compounds and the respond characteristic property in different temperatures of SAW sensor was studied in detail, had important reference value in counter-terrorism.
Doping with Metal and Compound to Improve the Properties of Hydrogen Storage of MgH2
Authors: Wang Yan , Wu Shi Wei , Li Tian Le , Li Shen Shen , Cao Zhong Qiu
Published: August 2014

Recently, Magnesium hydride MgH2is one of the attractive hydrogen storage materials because it reaches a high hydrogen capacity. However, the reaction kinetics is too slow and needs high temperature for progressing hydrogen absorption and desorption reactions, which hinders the process of practical applications and it is necessary to improve the hydrogen storage propesties. In this paper, most used or under research methods (Doping with metal and compound) of improving on the hydrogen storage of magnesium hydride are reviewed, in particular to elements substitution, addition of transition metal oxides or fluorine and so on. The advantages and disadvantages of vaious methods of improving on the hydrogen storage of magnesium hydride are compared. The trend of the methods of improving is also introduced.
Research of Microwave - Ethanol Auxiliary V2O5-WO3/TiO2 SCR Catalyst Regeneration Experiment
Authors: Wang Zhuang Kun
Published: August 2014

Using selective catalytic reduction (SCR) that takes NH3 as the reducing agent to remove NOx is one of the most often used coal-fired flue gas denitration technology that of the highest denitration efficiency. As the core of the SCR system, catalyst is the important factors that affect the whole SCR system denitration efficiency. As the growth of the running time, catalyst tends to lose active energy because of the surface channel jam and toxic element enrichment and deactivation. Each year the deactivation catalyst regeneration process, can save a lot of money, thus help to avoid pollution of the environment. So study of the SCR catalyst regeneration technology is around the corner, which is of great practical significance for lowering the cost of the SCR system, promoting the application of the SCR technology, and protecting the environment. In this paper, the research takes vanadium series SCR catalysts as the object to study the regeneration technology of catalyst, new physical structure recovery method, and effect of regeneration process in the treatment on the performance of catalyst.
Study on the Field Emission of Titanium-Based Nanodiamond Diode Structure by Electrophoretic Deposition
Authors: Liu Qiao Ping , Yang Yan Ning , Jiang Shuo , Li Wei Xia
Published: August 2014

A cathode process of nanodiamond field emission display based on diode structure by electrophoretic deposition has been explored. In this process, a certain proportion of nanodiamond electrophoresis liquid has been developed, the nanodiamond field emission cathode has been deposited on the polished metal titanium substrate by electrophoresis. The surface appearance and microstructures of the coating has been observed by scanning electron microscopy and Raman spectroscopy and the field emission properties of the prepared cathode coating has been tested. The experimental results show, the diamond-coated surface which has been deposited on titanium substrate is thin and uniform. Compared with the cathode prepared by the spin coating process, it has more field emission current density and better field emission current uniformity and stability. With a simple, low cost and large-area production and other advantages, it can be widely used in flat panel displays.
The Effect of Metal Source on the Preparation of Metallofullerenes
Authors: Wang Xun Yang , Lian Yong Fu
Published: August 2014

Endohedral metallofullerenes were prepared by DC arc discharge method with yttrium oxide and yttrium-nickel alloy as metal source, respectively. Mass spectroscopy and high-performance liquid chromatography analyses evidence that yttrium-nickel alloy has advantages over yttrium oxide in higher yield of soot, more species and higher yield of soluble metallofullerenes.
New Material Research and Application for Few Piece Leaf Spring of Heavy Vehicles
Authors: Meng Xian Yun , Wang Zhi Bao , Gao Wei
Published: August 2014

To solve the heavy vehicle leaf spring material issues, developed heavy vehicle leaf spring with a new material. This article focuses on technical solutions and new materials, materials testing trial and material properties, structure and toughening mechanism of tissue material analysis, leaf spring using new materials bench and road tests. The test results show that the new material with high strength, high ductility and excellent manufacturability. And fewer leaf spring meet material requirements, such as the high stress, high-performance and high reliability fatigue. The development of leaf spring using new materials has high fatigue properties, and it uses for liberation series replacement truck leaf spring.
Synthesis of Microstructured ZnO in Hydrazine Hydrate Using a Hydrothermal Method and its Optical Properties
Authors: Fei Xiao Yan , Liu Ting Zhi , Zhang Hao , Xu Xiang Min , Duo Shu Wang
Published: August 2014

Microstructured ZnO have been synthesized by a simple hydrothermal approach, using ZnCl2as the zinc source and N2H4·H2O as the amine precursor in water-ethylene glycol solution at 120 °C for 8 h. The X-ray diffractrometer pattern indicates the pure phase formation of ZnO. Scanning electron microscope images show that the aspect ratio of the ZnO microrod increases by the amount of N2H4·H2O ranging from 0.5 to 1mL, but continuing to 3ml, the aspect ratio of the ZnO microrods decreases. Moreover, the optical band gaps calculated through UV spectroscopy are found to increase from 2.94 (±0.02) to 3.0 (±0.02) eV for samples synthesized at different amounts of hydrazine hydrate ranging from 0.5 to 1mL, respectively.
Experimental Investigation on the Liquid Distributor Performance for the Falling Film Evaporation Process
Authors: Feng Dong Dong , Zhang Feng Ming , Yang Wei , Xu Yu , Pei Xiao Bin , Chen Shun Quan , Xu Shi Ming
Published: August 2014

In this paper, the liquid distributor performance for the falling film evaporation process was tested, and the relationship between the liquid height and flow rate were studied in the experiment. The results showed that the liquid height of liquid distributor is proportional to flow, liquid distributing hole diameter and flow, but inversely proportional to liquid distribution aperture. Overflow may be present at a high flow.
Dairy Farming Simulated Organic Wastewater of Degradation Experiment by Hydrogen Peroxide
Authors: Bi Yong Guang , Zhang Kuan Xin
Published: August 2014

In dairy farming simulated wastewater resorcinol as the research object, using hydrogen peroxide treatment method to study the effect of resorcinol, the results showed that: when the initial concentration of hydroquinone 1.0g / L, 1.5g / L, 2.0g / L, 2.5g / L, 3.0g / L, the degradation rate was: 45.95%, 44.72%, 40.86%, 35.37%, 31.23%. Resorcinol degradation rate increases with the decrease of the initial concentration, that is beneficial to the low initial concentration of degradation, but the higher the initial concentration of the degradation rate. When the amount of hydrogen peroxide is 1mL, 1.5mL, 2mL, 2.5mL, when 3mL, the degradation rate was: 60.40%, 63.54%, 68.13%, 75.87%, 80.94%. Studies have shown that ultrasound combined with hydrogen peroxide is a good resorcinol degradation of organic pollutants in new ways.