bluuebunny/crossref_metadata_2025 huggingface dataset:
Flicker Noise in Opto-Electronic Oscillator and Photonic-Delay Homodyne Phase Noise Measurement System
Authors: Li Zu Lin , Yao Yuan , Hong Jun
Published: January 2015

In this paper, the effect of device flicker noise on the characteristics of both opto-electronic oscillator and Photonic-delay homodyne phase noise measurement system is analyzed. An analytic theory model of opto-electronic oscillator (OEO) is derived and verified by experiments in this paper, where the flicker and white noise are both considered. The sensitivity of Photonic-delay homodyne phase noise measurement system is improved by using high-linear photodetector and low-phase noise amplifier resulting from decreasing systematic phase noise.
A Research of the Essence of SQL Injection Attacks Vulnerability
Authors: Wan Min , Liu Kun
Published: January 2015

Semantic Gap problem is the essence of the SQL Injection Attacks vulnerability in Web applications. Web application loses the semantic information while the SQL statement is constructed dynamically. This paper analyzes the cause of the SQLIA vulnerability. And then it analyzes several suggested techniques, such as the filtering techniques and the static analysis, and points out their drawbacks in the SOLIA prevention, which leads to the conclusion that the key problem for the eradication of SQLIA is to solve the semantic gap problem causing by the unstructured SQL statement in the process of constructing a Web system dynamically.
Characteristics of Flow around a Modified Square Prism
Authors: Zou Lin , Hu Yong , Xu Han Bin , Lu Hong , Wang Miao
Published: January 2015

The present investigations focus attention on PIV measurements and three-dimensional numerical investigation on flow past a modified square prism with a sinusoidal surface. The detailed near wake vortex structures and velocity fields of such modified square prism are captured and compared with a straight square prism in the same flow conditions. The three-dimensional free shear layers behind the modified square prism extend further downstream and become more stable than those of the straight one. For a modified square prism, significant mean drag coefficient reduction and fluctuating lift suppression are obtained at the Reynolds numbers of 600 and 5900. It indicates that such modified square prism is capable of minimization of flow induced vibration and force reduction.
The Experimental Research of Air Explosion of Non-Ideal Explosives
Authors: Chen Jian Yu , Xu Geng Guang
Published: January 2015

The relationship of shock wave peak overpressure and the positive impulse of 10kg TNT, PW0,PW20,PW30 high energy explosives with different Al content and distance were studied through air explosion experiments. Besides, the damage of 140kg explosives to concrete and human being were analysized and calculated based on the fitted formulas, which shows that the damage area of PW20 is larger than other explosives.
Research on Mechanical Behavior of Hold-Welding Beams with Different Solder Joint Arrangements in Pallet Racks
Authors: Tang Gan , Zhang Chun Wei , Yin Ling Feng , Li Yong
Published: January 2015

Nowadays market demand for storage racks are becoming larger and larger in China, especially in logistics industry. Hold-welding beams are important components in storage racks, and searching for more reasonable solder joint arrangements on them is a problem. On the basis of traditional arrangement, this paper came up with another five schemes with differences in solder joint numbers and location. Then ANSYS was used to analyze the mechanical behavior of the beam in every scheme. According to the numerical analysis results, the most reasonable scheme was recommended.
Discuss on Tunnel Design for High Speed Metro Line
Authors: Kuang Jiang Hong , Yu Bin
Published: January 2015

When trains with high speed pass through the tunnel, there is pressure fluctuation in the tunnel which will cause discomfort of the driver and the passengers. Using unsteady one dimensional flow model, the aerodynamic effect caused by the train with speed of 120km/s running through the tunnel was calculated and analyzed. The results show that the routine tunnel size of Ф5.5m for metro lines can not meet the standard for comfort level. Instead, tunnels with inner diameters of 6.8m and 10.36m were recommended.
Mechanism of the Modified Carbon Nanotubes Toughening DSP Cement Mortar
Authors: Tan Jing Mei , Wang Ai Guo , Su Wen Jun
Published: January 2015

The analysis is made for the modification of multi-walled carbon nanotubes and the mechanical properties and microstructure of the modified carbon nanotubes toughening DSP cement mortar, the existence and toughening effect of modified carbon nanotubes on the fracture surface of materials were analyzed. Results shows that, the surface of the carbon nanotubes in the sample is covered with cement hydration products, with the carbon nanotubes in drawing state on the fracture surface and both ends of the tube connected firmly with cement materials, thus carbon nanotubes improve the toughness of materials effectively.
Research on Bearing Capacity of Concrete Filled Double Skin (CHS Inner and SHS Outer) under Eccentric Compression
Authors: Zhou Rong , Zhao Jun Hai , Wei Xue Ying
Published: January 2015

The ultimate load calculation formula for the solid multi barrel tube-confined concrete columns (CHS inner and SHS outer) was derived based on the Unified Strength Theory (UST) in this paper. The influence of intermediate principal stress and the double restriction effect and the decrease of longitudinal stress were considered in the formula. Based on the axial compression load and consider the eccentricity ratio and slenderness ratio, by introducing the reduction factor of concrete strength and the equivalent restriction reduction factor, based on unified strength theory solutions of thick tube, combined with concrete filled skin tube unified theory, deduce the calculation formula of eccentric compression bearing capacity of concrete filled steel tubular columns and analysis the influence complication.
Progresses in Concrete Technology
Authors: Clement Francis Deng , Zhang Hong , Liu Cong
Published: January 2015

Investigationofrecentprogressesinconcretetechnology,withemphasisonresearchachievedattheCenterforAdvancedCementBasedMaterials (ACBMCenter) atLiYang, china, as explored during our recent visit is presented.Ultra-high-strengthconcrete (UHSC),withcompressivestrengthof200MPa,devisesbeenindustrialized. Thepropertiesandusesof reactivepowderconcrete,onetypeof UHSC,areargued.Fiberreinforcementisrecycledtoovercometheinherentbrittlenessandincreasethetensilestrengthofconcrete,particularlyhigh-andultra-high-strengthconcrete.Fiber-reinforcedcementitiousaggregatescan bedesignedforparticularuseswiththeuseofdistinctiveprocessingtechniques,suchasextrusion,and hybridfiberreinforcement.Significantdeclinesindryingshrinkageareattainedwithanewlyadvancedshrinkage reducingadmixture.Productioncostscanbereducedwiththepracticeofself­compressingconcrete (SCC),whichdoesnotrequirevibrationatplacement.Thedesign ofSCCisexpeditedwitharecentlyadvancedrheologicalmodel.Anondestructiveestimationproceduredevisesremaineddevelopedtomonitorthehardeningprocessoffreshconcrete.
Theoretical Research of Vertical Crack Propagation in Overlaid Cement Concrete Pavement
Authors: Gao Yuan Yuan , Jin Hai Jing , Jia Tao
Published: January 2015

In this paper, overlaid cement concrete pavement with crack is considered based on fracture mechanics. Cement concrete pavement is reduced to an elastic plate on Winkler foundation. Fourier integral transform, residue theorem and Lobatto-Chebyshev integration formula are used to obtain the analytical solutions of this problem. To analyze the effect of overlay for the old pavement, stress intensity factors ofItype crack and II type crack are calculated respectively for various overlay thicknesses, elastic moduli of the overlay. The stress intensity factors of the crack tips in the pavement with 10cm thickness overlay are reduced heavily. However, stress intensity factors are less affected by elastic modulus of overlay material.
The Effect of Micro and Nano Particle Sizes of HZSM-5 for Coupling Conversion of Methanol and 1-Butene
Authors: Bai Ting
Published: January 2015

Nano HZSM-5 has been tested in the coupling conversion of methanol and 1-butene reaction together with a micro HZSM-5. The catalysts were characterized with X-ray powder diffraction (XRD), scanning electro microscopy (SEM), N2 isothermal adsorption-desorption, temperature-programmed desorption of ammonia (NH3-TPD) and thermal gravity analysis (TGA). Nano sized HZSM-5 showed higher activity and stability compared to the micro sized HZSM-5.
Microsture and Properties of a Cu-Cr-Zr-Fe-Ti Alloy
Authors: Huang Fu Xiang
Published: January 2015

The effect of 0.45 wt. % Fe and 0.2 wt. % Ti additions on the age hardening behavior of Cu-Cr-Zr-Zn alloys has been investigated with respect to hardness, electrical conductivity and microstructure. It was showed that the addition of Fe /Ti to Cu-Cr-Zr-Zn alloys enhance strength and hardness, but decrease the electrical conductivity, and increase the aging temperature and time for attaining peak hardness. The scanning electron microscope (SEM) and transmission electron microscopy (TEM) results showed that there are four types of phases in the alloy, Cu-matrix, Cr-rich, (Cu,Zr)-rich and (Fe,Ti)-rich phases.
Parameter Evaluation of the Chaboche Model with Kinematic Recovery Term for a Nickel-Based Superalloy
Authors: Zhan Zhi Lan
Published: January 2015

The Chaboche unified model with kinematic recovery term was used to describe the cyclic plasticity and viscoplasticity of a new nickel-based superlloy. The model response sensitivities to the change of each parameter of this Chaboche model under either stress control or strain control are calculated and analysed. Influential parameters were identified. This has facilitated the design of an efficient test matrix and the development of a gradient-driven non-linear optimisation algorithm.
Fabrication and Analysis of β-Sialon Whiskers from Fly Ash by Carbon Thermal Reduction-Nitridation
Authors: Zhang Jing , Yu Jiang Long , Zhao Huan , Liu Jun Shuai
Published: January 2015

β-Sialonwhiskers which the molecular structuralformula of β-Sialonis Si3Al3O3N5(z = 3) were synthesized from fly ash and graphite under appropriate technological conditions by carbothermal reduction–nitridation process. The effects of carbon content, reaction temperature and reaction time on synthesis ofβ-Sialonwere analysed by XRD, SEM techniques. The results proved that, the condition of the carbon content over 80% is the best parameter to promote theβ-Sialon powder production. Compared to other kinds of temperature, 1430 °C is the optimal temperature to promoteβ-Sialon powder generation. Compared to 3h, holding time of 6h is promoting theβ-Sialon powder generation.The main morphology of β-Sialon was rod-like whisker.
Synthesis of High-Purity Methylal by Reactive and Extractive Distillation
Authors: Liu Ji Quan , Wang Peng
Published: January 2015

The process for production high-purity methylal, which used methanol and formalin in the presence of cation-exchange resin catalyst, was investigated in the reactive and extractive distillation column. Effect of feed mole ratio of formaldehyde in the extracting and reacting section, molar ratio of methanol and formaldehyde, reflux ratio on the content of methylal in the distillate were investigated. The results show that the purity of methylal can reach 99.1% under the optimum conditions.
Synthesis of a New Fluorinated Carbon Material
Authors: Jiang Sheng Bo , Lu Jia Chun , Huang Ping , Liu Zhi Chao
Published: January 2015

Lithium/fluorinated carbon batteries (Li/CF), which have the highest theoretical capacity, long shelf life, a wide operating temperature, safety and non-pollution, have been becoming the best potential storage batteries. Bamboo charcoal with high specific surface area and large layer spacing is suitable for preparing the fluorinated carbon material. By means of ameliorating the preparation process and gas-solid fluorination, the moderate output fluorinated bamboo charcoal was synthesized. Used for the cathode material of lithium battery, it also reveals the novel discharged voltage of 3V versus Li/Li+ electrode and the special capacity over 800 mAh⋅g-1.
Synthesis of Photoluminescent Carbon Nanodots and their Inarching with Quercetin
Authors: Li Hong Xia , Wang Xing Yu , Guan Feng , Wang Kun Jie , Zhang De Yi , Feng Hui Xia
Published: January 2015

Carbon nanodots (CDs) have been synthesized by chemical oxidation of C6H12O6 in NaOH solution . The as-prepared CDs possess strong blue luminescence.KH560 serve as coupling agent to modify the quantum dots by the method of ultrasound reaction .Finally the obtained C-dots powder have been successfully grafted with quercetin,which is one kind of flavone .This process made the drug have better thermal stability.
Finite Element Analysis of Single Quantum-Dot's Spontaneous Emission in Photonic Crystal Slabs
Authors: Yu Xu Guang , Yu Zhong Yuan , Liu Yu Min
Published: January 2015

We present a finite element method to analyze the spontaneous emission of a single quantum dot in photonic crystal slabs. Through changing the geometry of the photonic crystal slabs and the position of the quantum dot the spontaneous emission can be funneled into a mode that we desired efficiently. Different photonic crystal cavities and waveguides are demonstrated. The physical mechanism of this phenomenon is discussed and the application prospects of this design are proposed.
Research of Dinosaurs Weathering Mechanism in Zhucheng Shandong
Authors: Zhang Shang Kun , Du Sheng Xian , Yu Xue Feng , Zhang Guo Rong , Luo Xiang Yu , Jia Chao , Zhang Zeng Qi , Chen Jun
Published: January 2015

In recent years, more and more domestic and international dinosaur fossils geological heritage were found, and many dinosaur fossils severe weathering within a few years after excavation.This study were based on Zhucheng dinosaur fossils ,the research of weathering mechanism of dinosaur fossils were from aspects of physical - mechanical characteristics.Means of laboratory experiments, physical models, theories and numerical experiments were used to explores the effect of weathering by the factors of excavation process, water, temperature , acidic substances and other factors on dinosaur fossils and relics.The results reveal the physical destruction of Shandong Zhucheng dinosaur fossils in the mechanism and characteristics of weathering process can provide theoretical and scientific basis for the protection of fossils, and other parts of the mechanism of weathering and protection of dinosaur fossils study provides reference value.
AZ80 Magnesium Alloy Mold Temperature Field Analysis in Isothermal-Forging by the Boundary Element Method
Authors: Li Wei Min
Published: January 2015

Using the boundary element method, AZ80 magnesium alloy isothermal forging mould temperature field has be calculated. the outer wall of mold base temperature control at 360 °C, the model of cavity surface minimum temperature at 281.382 °C, the model of cavity on the surface of the highest temperature at 282.319 °C. Mold base outside the cavity wall and the model shows that the maximum temperature at 78.618 °C, the model of the maximum temperature difference between the cavity surface is 0.937 °C.
A Global Tribological Approach of Friction Dry Contact Polymer with SGF on Steel, in Terms of Consequences on Metallic Surface Condition (Comparative Wear Coefficients of Steel Surface)
Authors: Florescu Virgil , Capitanu Lucian , Rus Dorin
Published: January 2015

In this paper, we present a global tribological approach of friction dry contact polymer with SGF on steel, in terms of consequences on metallic surface condition (comparative wear coefficients of polished steel surface) based on extensive experimental determinations between the value and the evolution of the friction coefficient, wear of steel surfaces and contact temperature, in the case of linear dry contact, for thermoplastic material reinforced with short glass fibers (SGF) and various steel surfaces. The aim was to highlight the evolution of the wear process depending on the friction coefficient, as well as the dependence of the loading wear and the sliding speed. Wear depth and volume were calculated based on the “wear imprint” method. As a result, it was possible to graphically illustrate the evolution of the friction coefficient, of the contact temperature, and the change of the wear process, emphasizing the abrasive, adhesive and corrosive wear. The evolution of the plastic material transfer function of the contact temperature, namely of the power lost by friction was highlighted. It has been demonstrated that in the case of a 30% SGF content it can reach and even exceed contact temperatures very close to the yield limit of the plastic material. The influence of the normal load and sliding speed was evaluated in detail. The influence of SGF content, normal load, relative sliding speed and contact temperature over the metal surface wear and over the nature of wear mechanism was recorded. The reaction to wear of different steel surfaces in linear dry friction contact on polymers with SGF (polyamide + 20% SGF, polyamide + 30% SGF and polycarbonate with 20% SGF), observing the friction influence over the metallic surfaces wear. The paper includes also its analysis over the steel’s wear from different points of view: the reinforcement content influence and tribological parameters (load, contact pressure, sliding speed, contact temperature, etc.). Thus, authors' findings related to the fact that the abrasive component of the friction force is more significant than the adhesive component are presented, which generally is specific to the polymers’ friction. Authors’ detections also state that, in the case of the polyamide with 30% glass fibres, the steel surface linear wear rate order are of 10-4mm/h, respectively the order of volumetric wear rate is of 10-6cm3/h. The resulting comparative volumetric wear coefficients are of the order (10-11to 10-12) cm3/cm and respectively linear wear coefficients of 10-9mm/cm.
Water/Methanol-Repellency and Wetting Mechanism of Moth Wing Surface
Authors: Sun Gang , Fang Yan
Published: January 2015

The water-and methanol-repellent properties of moth wing surfaces were determined by a contact angle (CA) meter, the chemical composition and microstructures of moth wing surfaces were investigated by a Fourier transform infrared spectrometer (FT-IR) and a scanning electron microscope (SEM). The wing surface is composed of naturally hydrophobic material and possesses hierarchical rough structures. The wing surface exhibits high repellency against water (CA 139.2~155.6°) and methanol solution. The critical concentrations for wetting and spreading-wetting of methanol solution on the wing surfaces are 60% and 80%, respectively. The complex wettability of the wing surface ascribes to the coupling effect of chemical composition and micro/nanostructure. Moth wing can be used as a template for bionic design of special functional surface.
Frequency Response Analysis of Damped Dual Mass Flywheel
Authors: Zeng Rong , Jiang Zheng Feng , Wan Xing
Published: January 2015

s:Aiming at circumferential arc spring dual mass flywheel (CSDMF), this paper carries out analysis on the piecewise linear model and calculates the frequency response of damped model under sinusoidal excitation. Being combined with the calculate results, the research respectively analyzes the value of inertia ratio, torsional stiffness and damping parameters. The analysis results show that the greater the damping, inertia ratio of primary and secondary flywheels are, the torsional stiffness, the more obvious vibration damping of the dual mass flywheel would be. To meet the vibration damping requirements, the detail design of the three parameters need to be combined with power train and the torsion characteristic of CSDMF.
Monolayer Cable-Stayed Steel Moment Resistant Frame and its Lateral Force Resisting Performance
Authors: Lan Sheng Ning , Li Chun Xiang
Published: January 2015

A new lateral force resisting system (LFRS), referred to as the monolayer cable-stayed steel moment resistant frame (MCSMRF) system, is proposed in order to improve capacity of original MRF system and reduce lateral displacement of the system effectively. The MCSMRF integrates the respective advantages of both the steel moment resistant frame (MRF) and inclined cables, Likewise, the CSMRF renders both the dual seismic defense line and self-centering capacity. The working mechanism of the CSMRF are introduced. Secondly, the floor displacement (relative to the ground) approximation formula is developed for the MCSMRF under the lateral loading. Eventually, the numerical analysis is made of the MCSMRF with resorting to the developed approximation formula. The results show that the interstorey drift and the floor displacement significantly reduce with respect to the original steel MRF. Approximate calculation formula of elastic floor displacements can provide a theoretical basis for the preliminary design of its components.
Development of Data Info Library Management System on the Basis of SharePoint Portal Server
Authors: Zhang Bing
Published: January 2015

data information management has thoroughly changed the traditional mode of data management, whose real ability is not only presented on a more efficient work way, but also on the creation of a new work approach, which is the core content of department work flow reorganization, and also the embodiment of the ultimate goal of department workflow reorganization. With the continuous development of enterprise information, the establishment shall be constantly perfected of data management information system.
Linear Static Analysis of Composite Hat Stiffener Based on ANSYS
Authors: Li Hong Yuan , Xu Li , Mei Lei , Wang Da Zheng
Published: January 2015

In order to research the effect of core material on strength and stiffness of hat stiffener, using the finite element method which establishes a series of hat stiffener finite element models with different core materials. This research indicates that foam core material in simple models can be negligible, and pinewood needs to be considered. For large and complex composite material structures, from the security and efficiency aspects to consider, the core material of hat stiffener could be ignored in their models.Using Beam188, Beam189, Shell99 element to simulate rectangular hat stiffeners, the results shows that the beam elements can simulate the hat stiffeners instead of shell elements when setting up a finite model of the whole ship in order to simplify the modeling.This study provides a basis for the simplification of GFRP fishing vessel finite element model and makes great significance to its direct calculations and rapid design. Meanwhile, this study has a certain reference value for the design and calculation of the hat stiffeners in composite ship．
Research on the Material Differences of 7050-T7451 Aluminum Alloy
Authors: Wang Wei Han , Zhang Wei Fang , Zhang Wei , Yang Jin Song
Published: January 2015

Microstructure analysis and tensile fracture analysis were conducted on the domestic and imported 7050-T7451 aluminum alloy to investigate the material differences between them. Tensile test shows that the yield strength and tensile strength of domestic 7050-T7451 aluminum alloy are both higher than imported 7050-T7451 aluminum alloy, however, the material elongation and the reduction of area are both lower than imported material. Microstructure analysis shows that compared with domestic 7050-T7451 aluminum alloy, in the imported 7050-T7451 aluminum alloy, the degree of recrystallization and anisotropy is less, and the grain size is smaller. In addition, the transition from material surface to center organization of imported 7050-T7451 aluminum alloy is more smooth and uniform than domestic material. From tensile fracture analysis, it concluded that the domestic 7050-T7451 aluminum alloy has large grain size, low structural homogeneity, and little toughness characteristic of fracture, and those characteristics cause low elongation and low reduction of area of domestic 7050-T7451 aluminum alloy.
Research of Fire Behavior and Toxicity of the Typical Building Decoration Materials
Authors: Chen Yan Fei , Zhuang Shuang , Yang Liang
Published: January 2015

In this paper, the development of indoor fire and burning characteristics of thedecorative materials and toxic fumes produced were analyzed. In addition, toxicitytests were made on the typical decorative materials based on animals exposedexperiment. As a result, such as calcium silicate board and gypsum board areall up to AQ1, other decoration materials, carpet, toxicity levels of otherdecoration materials such as carpet,wood and fabrics are from ZA3 to ZA1，which are quite differentof the same type material, and accordingly, the fire hazard of those materialsare also different significantly.
Mechanical Properties of the Ecological Filling Blocks of the New Composite Wall Based on the Unified Strength Theory
Authors: Huang Wei , Zhang Ting
Published: January 2015

In order to make the new composite wall structure the group developed to adapt different regional natural conditions, and along with the demand of gradually in-depth study the damage characteristics of the new composite wall, need to research the mechanical properties of the wall filling materials. In this paper, the ZG-CSS Electronic Universal Testing Machine was used on the uniaxial compressive test of the three blocks(the mud billet block, the cotton stalk block, the recycled EPS lightweight concrete block), to analyze the failure characteristics of the blocks and the other mechanical properties, such as Poisson’s ratio, elastic modulus, then the full compressive stress-strain curves are given, and at last fitting the mathematical expression of the uniaxial compressive stress - strain curves. And this paper also gives the yield criterion based on the unified strength theory of the three ecological filling blocks.
Application of Modified Nano TiO2 in the Binder of Artificial Marble
Authors: Yang Min , Pan Ling , Fan Zhi Qiang
Published: January 2015

The research studies the chemical modification of nano TiO2 and its application in the preparation of binder of artificial marble with superior comprehensive performance. Considering the content of coupling agent(KH-570), modification time, hydrolysis temperature and condensation temperature as the main influence factors, through orthogonal test designs, the optimal modification parameters were obtained. The results show that the hydrophobic of modified nanoTiO2 can reache 47%, and the artificial marble using polyster binder with modified nono TiO2 as binder obtains compressive strength as high as about 100 MPa.
Compressive Strength of Ground Waste Seashells in Cement Mortars for Masonry and Plastering
Authors: Woon Chin Peow , Shek Poi Ngian , Tahir Mahmood Md , Kueh Ahmad Beng Hong
Published: January 2015

For environmental protection and sustainable development, many research studies have been carried out on the utilization of waste materials in construction such as fly ash, mine tailings, slags, construction and demolition waste, wood sawdust, rice husk ash, crumb rubber and etc. In this study, two types of waste seashells; green mussel and cockle were tested experimentally to replace fine aggregate in cement mortar. The compressive strength of the cement mortar with seashells were compared with those of a control mortar that was made of a conventional river sand. The main parameter of this study was the proportion of ground seashells used as sand replacement (25%, 50%, 75% or 100% by weight). Incorporation of cockle in cement mortar resulted in higher compressive strength as compared to conventional mortar up to 110 percent. However, incorporation of green mussel resulted in decrement in compressive strength by 67 percent. The results indicate that ground seashells can be applied as a sand replacement in mortar mixes and may improve the compressive strength of rendering and plastering mortar.
Research on Ultra-Weak Bioluminescence Detection and Features for Freshness of Corn
Authors: Hu Hong Sheng , Niu Qun Feng , Cui Bo Yuan
Published: January 2015

Detection of ultra-weak bioluminescence for freshness of corn is not only a problem of corn safe storage but also related to corn quality. The paper built a Virtual Instrument platform based on LabVIEW and PXI4220 modularized hardware of NI. Then, a testing and analysis system for corn ultra-weak bioluminescence features was designed. Different freshness corns were tested and analyzed about the relation of freshness and ultra-weak bioluminescence features. The experimental results shows that the ultra-weak bioluminescence voltage peak values of different freshness corns all maximize about 1 hour, and voltage peak values between different freshness corns have no evident relationship. However, the ultra-weak bioluminescence voltage energy sum of different freshness corns increase progressively with the freshness degree. So, detection of voltage energy sum of different freshness corns can reflect wheat freshness effectively. Comparing with traditional method, the freshness detection method based on wheat ultra-weak bioluminescence features can realize precise, rapid and nondestructive examination.
Study on 6H-SiC Crystal Substrate (0001) C Surface in FA-CMP Based on Diamond Particle
Authors: Zhang Zhu Qing , Xing Kang Lin
Published: January 2015

Through experimental study on the role of the free abrasive in chemical mechanical polishing, in this paper, four different types of abrasive which were chosen were used for the research of material removal rate(MRR) and surface quality of SiC single crystal . Finally ,Diamond abrasive which is considered was the most suitable for chemical mechanical polishing(CMP) abrasive of SiC Crystal Substrate. With diamond Particle polish pad polishing, it is draw a comparison result on the influence of the free abrasive and consolidation abrasive for the material removal rate and surface quality of 6H-SiC. The results showed that: the MRR is 140nm / min, the material removal rate if fixed abrasive chemical mechanical polishing(FA-CMP) more than three times that of traditional CMP, fixed abrasive chemical mechanical polishing pad, are involved in a large proportion of micro abrasive cutting, can greatly improve the material removal efficiency. And results from the test procedure, the FA-CMP surface has scratches after more technical problems for the polishing pad, the surface damage is relatively free of abrasive chemical mechanical polishing is more serious.
The Relationship between Superhydrophobicity, Self-Cleaning Performance and Microstructure of Butterfly Wing
Authors: Sun Gang , Fang Yan
Published: January 2015

The microstructure and hydrophobicity of butterflywing surfaces were investigated by a scanning electron microscope (SEM), an atomicforce microscope (AFM) and a contact angle meter. The relationship between hydrophobicity,self-cleaning performance and microstructuralcharacteristic was analyzed. The butterfly wing surface is of lowadhesion (water SA 1~3°) and high hydrophobicity (water CA 138~157°). Theaverage rate of CaCO3 pollutionremoval from the wing surface is as high as 86.2%. There is a good positive correlation (R2=0.873)between pollution removal rate and roughness index of the wing surface. The coupling effects of hydrophobic material andrough microstructure contribute to the complex wettability and remarkableself-cleaning property of the wing surface. Butterfly wing can be potentiallyused as a template for design of micro-controllable superhydrophobic surfaceand nano self-cleaning material. This work may offer inspirations forbiomimetic fabrication of novel interfacial material with multi-functions.
The Research of LEDs with Metal Substrates
Authors: Kuang Hai , He Shi An , Xu Meng
Published: January 2015

There are good thermal conductivity, high luminous efficiency in the LEDs with metal substrates, which can effectively solve the problems such as poor heat dissipation、poor reliability of LEDs. The copper substrate LEDs have successfully developed with good performance by SemiLEDs, which indicates the direction of the high-power semiconductor devices for lighting.
Influence of Material and Constitutive Models on Friction Analysis for Modelling in Machining Cellular Metal Structures
Authors: Guerra Silva Rafael , Teicher Uwe , Nestler Andreas , Brosius Alexander
Published: January 2015

The selection of an adequate friction model is an important aspect inthe finite element modeling of machining. Previously, different friction modelshave been compared, but the influence of the constitutive model or theworkpiece material have not been considered. This article focuses on theinfluence of the material and the constitutive model on the evaluation of thefriction model in machining. Numerical experiments are performed on threedifferent materials using different constitutive models. For every combinationof material and constitutive model, several simulations using different Coulombcoefficients, but the same cutting parameters, are performed. Several variablesare evaluated: cutting force, shear plane angle, chip-tool contact length,maximum temperature and maximum stress. The results reveal that the workpiecematerial plays an important role in the evaluation of the friction model. Theyalso show that there is significant influence from the constitutive models oncontact length, curvature ratio and chip thickness.
Synthesis and Dielectric Properties of PPy/TiO2 Composite
Authors: Zhao Hai Tao , Liu Rui Ping , Wang Qiao , Yang Kai Xin
Published: January 2015

TiO2/PPy composite was prepared by in situ polymerization of pyrrole on TiO2 microparticles. The results show that PPy chains have ordered arrangement to some extent. The average diameter of PPy microspheres is roughly 500 nm. TiO2 microspheres obtained are anatase-type. PPy/TiO2 composite particles are similar to spheres and there is some reunite phenomenon. The tanδe value for TiO2/PPy composite is higher than PPy in the frequency range of 8.2-12.4 GHz and it has achieved a maximum of 0.57 at 11.9 GHz.
Design of Work-Piece Rapid Handling Device
Authors: Song Zhi Dong
Published: January 2015

The rapid handling device for work-piece is designed to solve the inconvenience of using bolts, nuts and pressing plate combination for clamping work-piece in traditional machining process, which solves the problem of inconvenience and time consumption caused by the can-not-be-moved-freely supporting plate and the pressing plate that may fall off freely as well as the problem of improper positioning caused by work-piece movement. The rapid handling device improves work-piece positioning accuracy and work efficiency.
Design of Push Frame and its Machining Fixture
Authors: Liu Bing Chang
Published: January 2015

In the article we have carried on the design to promote frame and processing clamp. Formulate rules of mechanical processing technology fistly, mainly including:1. The production process and mechanical processing technology process.2. Formulate the original data to develop mechanical process. By analyzing the data, draw the processing technology of promote frame parts. Design the machining process, formulate the process route of machining. Finally, complete the design of fixture by Selection of locating datum, the cutting force and clamping force calculation, positioning error analysis.
Factor Analysis and Regression of the Air Source Heat Pump Water Heater Energy Efficiency Coefficient
Authors: Yu Hua Ming
Published: January 2015

Using the orthogonal experiment method, the factors of air source heat pump water heater energy efficiency coefficient (COP) were analyzed. It was determined that the temperature of water influenced the energy efficiency coefficient the most, then the surrounding temperature and the surrounding humidity. Regression equation about the energy efficiency coefficient was obtained and was testified to be of great significance to industrial production.
Review of Laser Ignition for Methane-Air Mixtures
Authors: Wang Hong Tao , Xu Cang Su
Published: January 2015

Reducing vehicle pollutant emissions and fuel consumption is becoming more and more important challenges, while lean-burning are a promising development. However, lean-burning may leads to other problems including combustion instability and incomplete combustion. Recently, laser ignition system has become an attractive field of research in order to replace the conventional spark plug ignition systems in the internal combustion engines to solve problem above. Moreover, methane was regarded as very promising fuel. Therefore, the objective of this article is to review the ignition and combustion characteristics of methane-air mixtures by laser-induced ignition.
A Correlation Model Based Failure Mode Analysis Method for Mechatronics Systems
Authors: Liu Ying , Hu Zheng , Zhang Shi Gang
Published: January 2015

Failure mode analysis formechatronics systems has many problems in real applications in terms of excessivedependency on experience, lack of uniform description and tedious analysis work. In order to increaseits effectiveness, an automatic failure modes analysis framework is constructedand an extended fuzzy cognitive map is used as a reasoning technique toanalysis the effect of the failures. A function-failure correlation model witha standard description is adopted to describe the relationship between failuremodes and functions, so that designers and engineers from different fields cancomprehend and communicate within the same framework. Functional flows andfailure modes are defined as basic concepts in the fuzzy cognitive map, whichprovides an easy way to carry out an automatic cause and effect reasoning.
Design and Implementation of PID Algorithm Based on PLC Closed Loop Control System
Authors: Guo Zhi Wei , Hu Cong Quan
Published: January 2015

The article describes three usual manners and introduces about one Siemens S7-200PLC’s closed loop control system how to realize the PID , the principle of the PID digital controller, how to use the PID digital controller, an example about how to program with it, and how to convert the input-output variable.
Design and Implementation of the Highway Traffic Safety Early Warning Information Service System
Authors: Liu Sheng Rui
Published: January 2015

This paper is aimed to establish to car networking as the foundation, a new traffic information service system in large data environment, the system is built based on vehicle network, meaning lies in providing the expressway traffic safety early-warning information services, further improve the quality of service of freeway traffic warning information and intelligence level. In this system, also conducted a small scale experimental validation, test showed that the effect of new application of traffic information service system is good. The system helps to ensure transportation safety and efficient operation for car, Internet users more traffic information service of intelligent and personalized.
Process Optimization and Characterization of Copper Oxide/Zeolite for Heterogeneous Catalytic Wet Oxidation of Dyeing Wastewater
Authors: Liu Ting , Jiang Bo Quan
Published: January 2015

Waste coal fly ash was used, as a cheap and handy material, to synthesize zeolite.The synthesized zeolite was then taken, as a carrier, to load CuO by dipping method for heterogeneous catalytic wet oxidation of acid bright red GR wastewater. The optimal process parameters of CuO loading were determined by orthogonal test. The comparison of XRD patterns of zeolite and CuO/zeolite displayed that CuO was successfully loaded on the zeolite.The SEM morphology of CuO/zeolite revealed that the cotton shape structure with more loose surface of CuO/zeolite was obtained compared with the SEM morphologies of fly ash and synthesized zeolite. The experimental results of water treatment showed that high CODCr and chroma removal rates of 88.27% and 99.97% were achieved by the prepared CuO/zeolite sample,respectively.
The Study of a New Type of Cast Iron Material Used in the Glass Mould
Authors: Kong Jian , Che Lin
Published: January 2015

Develop a new type of alloy cast iron material.Design experimental scheme and research method, choose low tin vermicular cast iron as raw materials, to determine the main alloying element and trace alloying elements, formulate the necessary particularizing alloy. On the basis of strict technology and process, to complete the cast iron smelting, produce vermicular cast iron that has a good comprehensive performance. To observe the metallographic structure of cast iron under a microscope. Finally，test the stretchability of the developed vermicular cast
Multi-Source Information Fusion Based on Kalman Filtering
Authors: Zhou Meng Meng , Gao G.M. , Yang Hong Bo
Published: January 2015

Thehigh-frequency angular micro-vibration on satellite platform results in theoptical axis pointing decreasing accuracy. The Kalman filtering based on attitudeinformation fusion method is presented to solve this case and improve the pointing accuracy of attitude determination. Thesimulation results indicate that the estimated accuracy of Kalman filteringattitude information fusion method is better than the result only fromconventional low frequency sensor. Accordingly, the attitude information fusionmethod is verified and accuracy.
The Intelligent Fault Diagnosis Based on Bayesian Network Inference Algorithm Solution
Authors: Wang Hao , Sha Sha
Published: January 2015

In this thesis a remote intelligent fault diagnosis system based on wireless network is put forward. A method of data-transmission based on wireless network is analyzed and a scheme for intelligent fault diagnosis on the basis of Bayesian network is laid out.This thesis also researches on how to build a fault diagnosis model taking advantage of Bayesian network and how to improve the system's resolving ability and reasoning quality in the process of intelligent fault diagnosis.
Design and Implementation of Error Simulator Based FPGA for Optical Data Link Transfer Test
Authors: Deng Bin Wei , Liu Chong Han
Published: January 2015

There is the extremely high radiation in the detector of ATLAS for LHC (Large Hadron Collider). The upgrading ATLAS Liquid Argon Calorimeter readout optical data link includes on-detector (front-end) and off-detector (back-end). There are the data stream burst continuous multi-bits errors and bit slip when the high-speed data are collected and transferred under the extremely high levels of radiation environment on the front-end. The data is restored on the back-end by FPGA. The design and implementation of error simulator based a Xilinx Kintex 7 for front-end is proposed in this paper to support the design and simulation test of the decoder and encoder of LOCic. Experimental and data analysis show it is valid.
Finite Element Analysis of High Strength Recycled Concrete Beam Flexural Properties
Authors: Zhang Hai Long , Pei Chang Chun
Published: January 2015

By ANSYS finite element analysis we study the impact-span moment and deflection of high strength recycled concrete beam in state of initial cracking and yield with different water-cement ratio and recycled coarse aggregate replacement rate. The results showed that: 1With the increase of water-cement ratio and recycled coarse aggregate replacement rate, the deflection is on the rise. 2With the increase of recycled coarse aggregate replacement rate, the yield moment has a slight upward trend. And with the increase of water-cement ratio and recycled coarse aggregate replacement rate, the span deflection at the state of yield has a growing trend.
Research on the Influence of Coal Mining on Aquifer
Authors: Wang Peng Jie , Jin Hua , Zhang Tian Ju
Published: January 2015

The height of the water flowing fractured zone and the extent of water inrush caused by coal mining are the main influence factors on aquifer systems. Taking a coal mine of Shanxi province as research object, the impact of coal mining on regional surface water and groundwater was evaluated. The heights of the water flowing fractured zone of coal seams in No.3, No.8-2, No.15-1 and No.15-3 were 68.62~98.62m, 31.21~58.25m, 30.59~33.41m and 31.45~42.33m respectively. The results showed that the surface would not be penetrated and the surface water environment could not be impacted seriously. While the lower shihezi formation aquifer which was the mined-out area of coal seams in No.3 and No.8-2 would be penetrated. Coal seam in No.15-3 belongs to relatively safe area, which water inrush coefficient ranged from 0MPa/m to 0.0148MPa/m.
Strength Test Research on Cement-Soil of Peat Soil in Kunming
Authors: Gao Song , Zhao Hui Min , Cao Jing , Song Zhi Gang
Published: January 2015

Based on the engineering properties of the peat soil in Kunming, through indoor unconfined compressive strength test in this article, and changing the different cement mixing ratio including 12%, 15%, 18%, 21%, 24% and 27% and age including 3 d, 7 d, 14 d, 28 d, 60 d and 90 d, and we focus on the influence on unconfined compressive strength of cement-soil by both of them. Through the study of the regression analysis of test results, we obtain the basic strength characteristics of cement-soil of peat soil which is that cement-soil unconfined compressive strength increases with group of the cement mixing ratio and age and showing a good correlation between them. And the unconfined compressive strength of cement-soil with the increase of ratio presents approximate linear growth and a logarithmic curve approximation along with the age growth, and the growth rate is smaller and smaller.
Prediction of Karst Groundwater Level Based on R-Language - Taking Jinci Spring Basin as an Example
Authors: Shi Hui Jun , Qi Xin , Jin Hua
Published: January 2015

Considering the complexity and randomness of the karst groundwater systems, a multiple linear regression model was developed for groundwater-level prediction based on the R language. The Jinci Spring basin was taken as a case study. Results show that the established model can predict the dynamics of the karst groundwater levels with high accuracy at an annual time scale, which can be served for macroscopic groundwater management.
The Adsorption of Heavy Metal from Aqueous Solutions onto the Porous Biomorphic-Genetic Composite of Hydroxyapatite/Carbon with Eucalyptus and Bamboo Template
Authors: Cao Shuang , Huang Bin , Zhu Zong Qiang , Zhu Yi Nian
Published: January 2015

This study used two types of plant, eucalyptus and bamboo, to produce sorbents for copper (II), cadmium (II), zinc (II), and lead (II) metal ion removal in a water bath shake. The porous biomorphic-genetic composite of hydroxyapatite/carbon with eucalyptus template (PBGC-Fe/C-E) and the porous biomorphic-genetic composite of hydroxyapatite/carbon with bamboo template (PBGC-Fe/C-B) were prepared using eucalyptus and bamboo as plant templates, and through various processes including ammonia leaching, cyclical impregnation using calcium hydroxide and diammonium solutions, and aerobic firing inside muffle furnaces. Tests were conducted on the HAP/C composites to observe their adsorption effects on Cu (II), Zn (II), Pb (II), and Cd (II). The results show that the prepared composites were able to adsorb heavy metals in water effectively. The results indicated that the adsorbed amount of PBGC-Fe/C-E were found to be 16.4371, 4.6725,24.5528, 17.0194 mg/1 for Cu (II), Zn (II), Pb (II) and Cd (II) ions at initial concentration of 50mg/L (25°C), respectively. The adsorbed amount of PBGC-Fe/C-B were found to be 10.5876, 3.9142,21.2463, 13.4721 mg/1 for Cu (II), Zn (II), Pb (II) and Cd (II) ions at initial concentration of 50mg/L (25°C), respectively. The prepared adsorbent is expected to be a new material for the removal of heavy metals from contaminated water.