bluuebunny/crossref_metadata_2025 huggingface dataset:
Heat Analysis of Vehicle Drive Axle
Authors: Wang Yong Cong , Zhang You Kun , Lu Yan Hui
Published: September 2016

The vehicle drive axle is one of the main sources of power loss in drivetrain system, and its improvements can have a significant impact on vehicle fuel economy. Gears churning loss, bearing friction loss and engaging friction loss all make a great contribution to the heat generation. The temperatures of lubricants, the gear tooth contacting surfaces, and the bearing surfaces are critical to the overall axle performance in terms of power losses, fatigue life, and wear. So it is important to understand the heat generation and dissipation in automotive drive axle. However, the quantities of understandings of drive axle temperature is limited and published information is deficient.In this paper, we establish the mathematical model of heat generation and dissipation to investigate the connection between thermal behavior and power loss. Power loss is consist of churning loss, bearing friction loss and engaging friction loss. And also we simulate the model to get the conclusion and then conduct the experiments to verify the correctness of the theories and models.
Microstructure and Microhardness of Alumina-3wt. % Titania Coating Formed by a New Multi-Chamber Gas-Dynamic Accelerator
Authors: Kovaleva M.G. , Prozorova M.S. , Arseenko M.Yu. , Novikov V.Yu. , Sirota V.V.
Published: September 2016

Alumina-titania coatings are widely used in industry for wear, abrasion or corrosion protection components. This paper presents the results of the investigation of the structure and microhardness of the alumina-titania (Al2O3:Ti wt ratio = 97:3) coating was prepared by a new multi-chamber gas-dynamic accelerator on corrosion-resistant steel substrate. Morphology of the powder particles, microstructure and phase composition of the coating were characterized with the use of scanning electron microscopy, X-ray phase analysis and Vickers hardness tester at a test load 0.2 kg. The results show that the microstructure of the alumina–3wt.% titania coating consists of region with different degrees of melting: the lamella built up from the fully melted particles of the powder, and partially melted regions. The developed coating by this method is highly dense (porosity of less than 0.2%) and tightly adherent.
Calculation of the Grading Wheel Rotor’s Critical Speed and the Analysis of its Structure Parameters
Authors: Zhang Zhen Wei , Jin Ying Ying , Zhang Zhe
Published: September 2016

In a hierarchical system, grading wheel plays a very important role in material scattering and classifying. This article calculates the critical speed of the grading wheel rotor, a small part of the SZ spin flash dryer, based on finite element analysis software ANSYS. Meanwhile, in order to provide a theoretical evidence for the design of the grading wheel’s dynamic performance, analyze the influence of the bearing’s radial stiffness and some geometry parameters of the structure on the critical speed, including bearing stiffness, bearing span, cantilever length and wheel’s weigth. The result indicates that bearing span is approximately proportional to the critical speed, the cantilever length and runner quality are inversely proportional to the critical speed and the bearing span and the cantilever length have a greater impact on the critical speed.The final purpose of this paper is to find a set of proper parameters on the basis of the analysis result and optimize the rotor’s structure.
Numerical Simulation by FDM of Unsteady Heat Transfer in Cylindrical Coordinates
Authors: Takayama Mori Cláudia Narumi , Romão Estaner Claro
Published: September 2016

In this paper the heat transfer problem in transient and cylindrical coordinates will be solved by the Crank-Nicolson method in conjunction the Finite Difference Method. To validate the formulation will study the numerical efficiency by comparisons of numerical results compared with two exact solutions.
Fault Feature Detection of Rolling Bearing Based on LMD and Third-Order Cumulant Diagonal Slice Spectrum
Authors: Jie Bian , Huo Chang Qing , Yu Jing Jing
Published: September 2016

Bearing fault signal presents obvious nonlinear and non-stationary characteristics, and local mean decomposition (LMD) method can adaptively process nonlinear and non-stationary signal. Quadratic phase coupling is one of the commonest nonlinear phenomena, and three-order cumulant diagonal slice spectrum is suitable for the extraction of the frequency components involved in quadratic phase coupling. In order to effectively detect the fault features of rolling bearing, a fault feature detection method of rolling bearing based on LMD and diagonal slice spectrum was proposed in the paper. Diagonal slice spectrum was applied in the extraction of the frequency components involved in quadratic phase coupling from the simulation signal, and it successfully extracted the quadratic phase coupling frequency components of the , and . The method was finally used in the detection of the bearing inner race fault features, and the results demonstrated that compared with diagonal slice spectrum of the PF component signals, the diagonal slice spectrum of the PF component envelope signals can identify fault characteristics much clearer and brighter. Meanwhile, the effective extraction of the inner race fault features verified the effectiveness and practicability of the method proposed in this paper.
Study on Noise Characteristics of Facility Equipment and Subjective Responses
Authors: Shin Hye Kyung , Kim Kyoung Woo , Yeon Jun Oh , Yang Kwan Seop
Published: September 2016

For a house to maintain the standards of a quiet residential environment, it is necessary to reduce not only inter-floor noise delivered from neighboring houses but internal noise sources as well. Currently, noise measures on facility and equipment have been established in apartment houses in South Korea. This study aimed to provide foundational data needed to provide institutional standards on facility noise in apartments. Thus, this study analyzed noise level and acoustical parameters (loudness, sharpness, and roughness) with regard to noises from hoods and boilers in kitchens. This study also studied an annoyance rating, which was a subjective response to the noise, using 36 subjects. It also quantified a subjective response by calculating a %HA (percentage of highly annoyed) according to the maximum noise level from a boiler and kitchen hood, and a mean value of annoyance. No significant difference between the two rating scales was found.
Numerical Investigation of the Influence of the Flow Channel Gap on Performances of Axial Flow Maglev Blood Pump
Authors: Ren Yong Wu , Wu Hua Chun , Yang Shi Ping , Yang Wei Bo
Published: September 2016

Artificial heart pump (referred to as blood pump) has become an essential means to save patients with heart failure. The pump head, the flow shear stress, blood cell flow path have a close relationship with hemodynamic characteristics. And the flow channel gap is one of the main structural parameters of the blood pump that affects the flow characteristics. For an axial flow maglev blood pump, based on CFD, using k-ε model, unstructured mesh, establishing the whole flow channel model, a three-dimensional numerical simulation of axial flow maglev blood pump was carried. The relationship between the port clearance ratio and the pump head, the flow shear stress, blood cell flow path was explored. Simulation results show that: the port clearance ratio δ=0.75, the flow channel gap h = 2.5mm, blade height b = 1.8mm, the optimal performance was attained. The pump head reached 120mmHg, the maximum shear force was less than 450Pa, both meet the functional requirements and reduce the blood damage. This results provide an important basis for structure design of axial flow maglev blood pump.
One-Dimensional Simulation and Experimental Investigation of the Shell-Integrated Condenser of the Underwater Closed-Loop Thermal Propulsion System
Authors: Han Yong Jun , Lu Jun , Yang Cheng Shi , Bai Chao , Guo Zhao Yuan , Ma Wei Feng
Published: September 2016

In order to understand heat transfer of the shell condenser in the closed-loop thermal propulsion system of the unmanned underwater Vehicles, the one-dimensional thermal model based on the hull-integrated condenser with helix channels is developed. After this, experimental research is conducted. Through the experiment data and theoretical calculation results compared, the accuracy of the heat transfer mathematical model is verified, and the correlation formulas about heat transfer are developed. In addition, the impacts of three factors on the performance of the shell condenser are investigated, including cross-sectional area of the cooling channel, flow rate and temperature of inlet steam. The research results indicate that the model and the correlation formulas about heat transfer is reliability and accuracy, which can provide a theoretical basis for simulation and optimization design of the shell condenser.
Modeling an Explosive Liquid Outflow from High Pressure Thin Tubes and Nozzles
Authors: Bolotnova Raisa , Topolnikov Andrey , Korobchinskaya Valeria
Published: September 2016

To describe the explosive flow in thin tubes the model of vapor-liquid mixture with heat and mass transfer in two-dimensional axisymmetric formulation is employed. The phase transformation is significantly amplified with increasing of initial saturation temperature. The radial expansion of the jet outflow occurs due to the intensification of vaporization from cylindrical to conical form and parabolic form for supercritical initial state. Another problem applied to the outflow of a detonation wave in liquid filled with chemically active gas bubbles from the thin cylindrical tube. Modeling shows the important role of the opening angle of the outflow jet, which can either support the detonation or put it down.
Design and Fabrication of Gamma-Type Stirling Engine on Parabolic Dish of Solar Concentrator by a Compression Ratio Method
Authors: Saenyot Khanuengchat , Locharoenrat Kitsakorn , Lekchaum Sarai
Published: September 2016

In this article, we have designed and fabricated the gamma-type Stirling engine based on the compression ratio technique. This engine is attached on a parabolic dish of a solar collector. The engine shows a good performance in terms of compression ratio, external work, total pressure, and engine’s speed. Our engine offers the thermal efficiency of 30.59 % so that it can reach the output mechanical power of 0.934. The temperature difference of 137 K can maintain very well for the heat collection of the solar collector even when the weather conditions are poor. Furthermore, our materials are environmentally friendly and this design is expected to be in the applications of the solar tracker in the future.
Development of the Field of Cotton Plant Protection Robot Precise Multi-Topping Control System
Authors: Sun Xuan , Zhang Yan , Tang Cheng Long , Zhao Hong Hua , Ai Chang Sheng
Published: September 2016

For cotton multi-topping manual operation efficiency is low, small mechanical operation precision is low, is developed in the field of C310 industrial controller as the control core of cotton plant protection robotic multi-multi-topping control system. The system according to the sensor detects the plant protection robot walking speed and cotton top position, dynamic adjustment in multi-multi-topping blade height, in order to realize accurate, efficient and intelligent multi-multi-topping. By experimental verification, the system operation precision is above 90%, conform to the actual requirements.
BLDC Motor Torque Ripple Control Using Self-Tuning PID Fuzzy Control System
Authors: Wang Chao , Li Zhuang , Kang Guang Qing , Zeng Chun Yan
Published: September 2016

In order to suppress the torque ripple of the BLDC motor, at the same time considering the nonlinear and uncertainty of the BLDC motor, this paper mainly proposes a self-tuning PID fuzzy algorithm to control the torque ripple. Self-tuning PID fuzzy control is integrating the advantages of PID control system and fuzzy control system, using the error and change of error as inputs, and adjustment of PID parameter on-line by fuzzy control rules. Self-tuning PID fuzzy has the advantages of flexible and adaptable, and also have the characteristics of traditional PID control system such as broad applicability and high control precision. The results of simulation show that the self-tuning PID fuzzy control can suppress the torque ripple of BLDC motor effectively, the optimization of the dynamic and static characteristic of the system, satisfying the requirements of system performance, the superiority and reliability of the control strategy was verified.
Research on the Influence of Wood Nitrocellulose Coatings Modified by Nano-TiO2
Authors: Hui Xiao Yu , Wang Xiao Tang , Wu Yan
Published: September 2016

Using nano TiO2 nitro coating was modified, and the mechanical properties of modified wood nitro coating (wear resistance, hardness, adhesion and impact resistance performance) and optical properties of tested effects of nano TiO2 film mechanical properties and optical properties of the inquiry. The results show that: the nanometer TiO2 addition of different had not significant effects on the hardness and adhesion of the film, add the amount to 0.1g, the film with better wear resistance and impose on Matt state. At this time of nano TiO2 with the coating quality than when 1.30am, further use 0.01g alkyl ketene dimer of 0.1g nano TiO2 after surface modification and coating performance obtained at best. At this time film hardness Hb. The adhesion was grade 1 and the wear value for 0.024g and gloss was 19%. The study enriched the inorganic nanoparticles (TiO2) change the scope of application of the nitro paint.
Piezoelectric Energy Harvester Adjusted by Light-Induced Actuator
Authors: Mao Ya Na , Chen Guo Jin
Published: September 2016

Shape-memory polymer has two different effects, i.e. shape memory effect and variable stiffness effect. Significant Young’s modulus changes when an external stimulus is applied. Light-induced shape memory polymer exhibits great potential in application of actuators because of its reconfigurableness, adaptiveness and non-contact control. In this paper, a smart actuator based on light-induced shape memory polymer is applied to improve the output power of piezoelectric energy harvester. This energy harvester is a laminated beam structure which includes five layers. Two piezoelectric layers are attached on the upper and lower surfaces of substrate layer. Then two light-induced actuators are bonded on the piezoelectric layers to adjust the frequency of this laminated beam via variable stiffness effect. Output power of the energy harvester could be promoted after the light-induced actuation since the natural frequency approaching the excitation frequency.
Study on Features of 532nm Laser as Laser Source of Lidar
Authors: Zhang Peng , Xi Ming Ming , Wang Manman , Liu Pu , Liu Tao , Peng Hui , Ren Gui Dong , Tian Chun Lin
Published: September 2016

The laser source of Lidar usually use the high power solid laser, the performance of Lidar depend on the laser features, so that to study the laser features is contribute to optimize the performance of Lidar. Set up and design a pulse solid laser of Nd3+:YAG as the working substance. Through adopt the KTP crystal frequency multiplication technology outside the laser cavity and electro-optic q-switch technique, the maximum dynamic pulse energy of 155mJ and pulse width of 9.6 ns with the 532nm laser is generated. Using the oscilloscope, photoelectric pulse sensor and laser energy meter to measurement the experimental data of the laser source features Through analyze and discuss the experimental data, the relationship between the pulse width, the static and dynamic ratio, the peak power of the pulse Nd3+:YAG laser, the frequency doubling efficiency of the KTP crystal and the input power of laser are given, the solid laser system and the experimental data can provide a basic equipment and reference data to the further study.
Processing Method for End Effect of Local Mean Decomposition Based on Extreme Point and Distant
Authors: Chi Qi Cai , Zhou Min , Zhou Shi Jian , Wang Feng Wei
Published: September 2016

The end effect of the local Mean Decomposition (LMD) causes serious distortion of the LMD decomposition results. And the most important factor of influence end effect is the extreme point and its distance, so the paper extracted the several factors, and composed of different sequences, using support vector machine (SVM) method respectively on the sets of data to predict, makes the original data can be extended. The research on the simulation signal and vibration signal shows that the method can effectively restrain the end effect of the decomposition.
Personalized Ring Design and Rapid Manufacturing Based on Reverse Engineering and 3D Printing
Authors: Liu Jie , Dong Guan Ping , Fan Yan Bin
Published: September 2016

Ring as a souvenir and decorations for common people. Due to the design of the market a lot of repetition, people often wish have a unique custom ring , which often have personal logo. This paper Introduces a method of through the fingers to do a CT scan, reverse engineering software and 3 d printing to manufacture custom unique ring for people, This method has high practical value.
Information Feedback for Human Motor Skill Transferring System Using Augmented Reality
Authors: Tonggoed Tarinee , Charoenseang Siam
Published: September 2016

This paper presents the study and development of information feedback for human motor skill transferring system. The proposed system has an ability of capturing the demonstrator’s bimanual movement using Kinect which is the Microsoft’s sensing device. Then, the spatial and temporal data of the recorded movement will be encoded into the probabilistic model. When the learner wants to learn the demonstrator’s movement, the reproduced trajectory will be retrieved from the encoded model. After that, the augmented information guidance which is in the form of computer graphics using augmented reality technique will be presented to the learner during the practicing process. A virtual music performance is selected as the case study of transferring the demonstrator skill to the novice. The performance of proposed system guidance on the human motor skill transferring will be investigated. The experimental results indicate that augmented visual feedback leads to reducing the average position error of the novice’s movement with 67.2%. Moreover, 75% of the participants can improve their movement accuracies after being trained with augmented system guidance.
Preparation and Characterization of Silica Nanotubes with Cellulose as Template
Authors: Cao Kun Li , Wu Yan , Wang Jun , Hui Xiao Yu , Wang Xiao Tang
Published: September 2016

Cellulose is a kind of renewable biological template with complex microstructure. Surface sol-gel technology, a practical and environmental-friendly approach to produce silica nanotubes, was discussed in this paper. A series of characterization techniques, namely thermal field emission scanning electron microscopy (SEM), and Aztec X-act spectrometer were used to characterize these samples. The design of the nanotube structure was achieved by natural cellulose and cellulose nanocrystals (CNC), and this nanocopying methodology provided silica nanotubes of cellulose template in nanometer precision.
Study of XML Indexing Structure Based on XISS
Authors: Tang Hong Jie
Published: September 2016

The study is based on XISS(XML Indexing and Storage System) of Dietz’s Numbering Schema to determine the ancestor-descendant relationship. According to the results of research, this paper proposes an improved method of node encoding, realizes its indexing structure, and discusses its query path. Finally, the paper analyzes the property of this improved method.
New Green Building Materials
Authors: Wang Zheng , Han Feng
Published: September 2016

With our country economy has already came second in the world, urbanization development, but the rapid economic development also brings great hidden trouble, for example, the environmental problems, the population problem, such as water pollution problems. Which is closely related to the construction industry, therefore, make the green building industry, environmental protection and governance environment in China, such as water pollution problem plays an important role. This article is through the introduction to green materials, the classification of the new green building materials to do an overview.
Study on Fundamental Frequency of Airport Runway Based on Elastic Layered Soil Model
Authors: Liang Liang , Hou Yong Sheng
Published: September 2016

The relationship between fundamental frequency and structural layerof runway is discussed based on a series of ANSYS models. The research results indicate that the coupling effect of runway plates on fundamental frequency could not be neglected. According to the analysis on fundamental frequency of runways of different sizes, an area of 45m times 15m affects fundamental frequency the least. Thickness and strength of the base significantly affects fundamental frequency. Fundamental frequency of runway ranges from6.8Hz to 25.6 Hz.
Present and Future Research of Mortise and Tenon Joint in Timber Structure
Authors: Li Ling Xu , Xu Zong Heng , Ma Ming Chang , Chu Yan
Published: September 2016

Through the analyze and the research of seismic resistance of wooden structural, which summarized its characteristics, the seismic strengthen of tenon joints , seismic performance research status and aseismatic constructions. Pointed out that is a emphases to wooden seismic performance, and combine the earthquake damage in Wenchuang province, sum up the experience, put forward the corresponding opinions and suggestions which let wooden structural used better in China.
Structural Strength Analysis and Measurement of Composite Laminate Using Finite Element Method and FBG Sensor
Authors: Lin Yu Chuan , Hsueh Wen Jeng
Published: September 2016

The aim of this study is to develop structural strength analysis technique and real-time measuring system of composite laminate using finite element method (FEM) and fiber bragg grating (FBG) sensor. A composite laminate of cantilever beam was designed and fabricated using glass fiber reinforced plastic (GFRP) for structural mechanics behavior research. Six design cases of different orientations composite laminate were considered for the better combinations by using FEM program. The bending test of a composite laminate of cantilever beam was performed by using FBG sensor to obtained relationship between strain and displacement. The study result shows that the higher stiffness of composite laminate of cantilever beam was obtained in the [0/90/0/90] orientation. The first natural frequency is 34.83 Hz and corresponding mode shape is bending mode in Z-direction. The FEM and FBG sensor have been successfully used in variety of composite laminate design with different layering sequences by this article.
The Appraisal and Strengthening Design of a Large Adding Layer Supermarket
Authors: Lu Li Qi , Lei Hong Gang , Jiao Jin Feng
Published: September 2016

This paper takes a large supermarket as the research object. Based on its adding layer directly without identification, these implementations including reviewing design drawing, witnessed inspections, indoor test and theoretical analysis are carried. The identification results show that: the layer-adding design has a serious problem on the conception; part of the foundation's short concrete column misplaced seriously to its upper concrete column whose maximum is up to 50mm, and between the gap, there are some obvious weak positions existing some crossing pipelines which are filled completely with cement mortar; part of the concrete column's tails have serious phenomenon of cellular pits; the upper steel structure's support system is imperfect and unreasonable; the seismic capability of the blindly adding layer structure could not meet the national code's requirements. Based on the above structure defects, this paper ensure the safety of the adding layer structure through sticking steel's reinforcement method, section enlargement method and adding some structure 's support system.
Brief Introduction of Visualization of Optimum Structural Design
Authors: Sun Yu Hong
Published: September 2016

It is presented the idea of establishing a visual platform for optimum structural design called visualization of optimum structural design. The overall framework, the detailed process, the component modules and the key techniques of the implementation of the platform are introduced. The optimum design of the antenna back frame is discussed as an example.
Brief Discussion about the Changsha Yuan Da Steel Structure Residence System
Authors: Gong Zhao Lei , Lei Hong Gang
Published: September 2016

The study of the steel structure residence system has always been not only the hot part but also the difficult part in Chinese steel structure research area recent years. With theresidence industrialization getting more and more popular, the steel structure residence will get into a rapid developing period. The steel structure residence system of Chang Sha Yuan Da is well-known domestically and internationally, also have gotten the different responses. This paper puts focus on the analysis of the advantages and the disadvantages of this system, and have proposed some recommendations for the future modifications of this system.
Stress Analysis of Dongjiang Arch dam by Finite Element Method under Different Concrete Elastic Modulus and High-Low Temperature Seasons
Authors: Tang Wei Ping , Zhang Jun , Tian Hai Ping
Published: September 2016

Elastic modulus and temperature are the main influences of dam stress. In order to study the Dongjiang dam stress for crack controlling, the critical parts stress of dam under different elastic modulus and high-low temperature seasons is analyzed by the finite element method. The results show that: (1) the arch crown and abutment principal tensile stress at upstream face and principal compressive stress at downstream face under high temperature season are greater than the calculation results under low temperature season for the whole at the normal storage water level; (2) the influence on stress caused by elastic modulus are more significant under high temperature season compared to low temperature season at arch crown and abutment, the maximum stress increase with the increasing of elastic modulus. (3) Dongjiang arch dam should pay more attention to the safety control under high temperature season and surface crack prevention and control work in low temperature season.
Review of Thermal Performance: A Terrace House in Melaka, Malaysia
Authors: Abdul Rashid Fahanim , Ab Ghaffar Norafida , Aminuddin Asrul Mahjuddin Ressang , Ismail Muhammad Azzam
Published: September 2016

A field study of residents’ thermal comfort in a naturally ventilated intermediate single storey terrace house was carried out at Merlimau, Melaka. An intermediate single storey terrace house was chosen as a case study and indoor thermal condition measurements were recorded for three days. The indoor ambient temperature, relative humidity and air speed were measured using on-site monitoring equipment to evaluate the thermal performance of this house. A questionnaire survey was also conducted involving all occupants to determine their thermal comfort perception of the same case study house. The aim of this study is to analyse the indoor thermal condition of an intermediate single storey terrace house in order to propose architectural features to climatically adapt to the local climate. In naturally ventilated condition, results showed that this house is thermally uncomfortable and the indoor thermal condition was between 2.7°C to 5.9°C higher than suggested temperatures stipulated in ASHRAE Standard 55. Consistently, five out of eight occupants or less than 80% of occupants voted the house as thermally acceptable according to ASHRAE Standard 55.
Mass and Stiffness Matrices Updating Using the First Modal Data
Authors: Li Shi Qi , Zhang Zhe , Liu Shi Ping , Zhang Heng
Published: September 2016

This paper presents a new direct approach to simultaneously update the analytical mass and stiffness matrices in an undamped model .First, we assume that the difference between the finite element model and the real model is little. Second, only by utilizing the first order modal data orthogonal normalization conditions and eigen equations , we derive the updated matrices. Third, the method can maintain matrices symmetry and sparsity and preserve system connectivity. The merit of the proposed method is simple and accurate in a practical engineering computation. Finally,a numerical example is given to demonstrate the accuracy and effectiveness of the presented updating method.
Application of Support Vector Machine for Prediction of Slope Stability Coefficient Considering the Influence of Rainfall and Water Level
Authors: Tao Gui Lan , Yao Zi Shun , Tan Bin Zheng , Gao Cong Cong , Yao Yi Wen
Published: September 2016

Slope stability estimation is a complex engineering problem involving many factors. A hybrid model based on the combination of finite element software GEO-STUDIO and support vector machine (SVM) is proposed to address the problem. The study took a high slope of Jingjiang reach of Yangtze River as the research object. Several important parameters, including values of geometric and geotechnical properties of slope as well as rainfall and water level data were used to establish the finite element model for the high slope. Besides, the validity of the model was estimate using the measured data of pore water pressure. The slope stability coefficients were calculated in GEO-STUDIO environment. And the data were used as the input samples to train and test SVM model. Results show that the agreement achieved in pore water pressure between measurement and analysis using the finite element model can be considered very reasonable. And the slope stability coefficient results by SVM coincided well with that of finite element analysis. It suggests that the proposed model has the potential to be a useful tool for the prediction of slope stability coefficient considering the influence of rainfall and water level.
Influence of Compaction Energy and Bentonite Clay Content in the Soil Hydraulic Conductivity
Authors: de Freitas Neto Osvaldo , dos Santos Jr. Olavo Francisco , de França Fagner Alexandre Nunes , Nascimento Flores Severo Ricardo
Published: September 2016

This paper intends to evaluate changes in permeability of a soil sample from Formação Barreiras, in Natal, the capital city of Rio Grande do Norte State, related to the degree of compaction and the adding of clay to the soil sample. In field works, samples were collected and permeability and density tests were performed. In laboratory, grain size distribution, Attemberg limits and particle density tests were conducted. Afterwards, compaction and permeability tests fulfilled the set of laboratory tests, with changes in compactive energy and sample clay content. The results from field and laboratory tests were compared and the relationship between compaction energy and sample clay content were portrayed. The soil was classified as silty sand. Field and laboratory test results were quite similar. As expected, the tests indicated that permeability is inversely proportional to both compaction energy and sample clay content in the soil tested.
Analysis on the Causes of Fatigue Accidents of a Bolt-Ball Structure Plant in Shanxi
Authors: Lin Jian , Lei Hong Gang
Published: September 2016

This paper take a bolt-ball node network frame factory building collapse in shanxi as the research background,it suddenly had a partial collapse after used 13 years. Based on the field testing,fracture analysis and theoretical calculation with the finite element analysis software ABAQUS and MIDAS,including the simulating of the M33 high streng bolt’s stress concentration factor and the analysis of the grid structure’s force conditions, we found the cause of the high strength bolt’s fatigue fracture ,and finally,we concluded that this was a rare low cycle fatigue destruction under the action of indirect dynamic load.
Research on the Visual Impact of the Mobile Device Chinese Word Colors and Fonts for the Aged
Authors: Chen Chih Sheng
Published: September 2016

Technologically advanced age, the aged has become this era of disadvantaged groups. In the past there is a large button cell phone use for the aged. But mobile communications in recent years has developed into a smartphone with touch screen, resulting in the aged inconvenient to use and easy to recognize. However, not only mobile communications products, including the use of computer pages, software and other information equipment, but also most of these reasons are caused because the elderly person's eyesight due to aging and gradual degradation due to unrecognized normal average person can accept the font size and color. Therefore, the present study the way of creating web pages, design a different font size and color and with different backgrounds, the use of the Tablet PC and the smartphone, to community centers let the aged test which screens more acceptable, after comparing statistics, induction, and for the subsequent production of the aged web designers use the reference basis, to cope with the future aging society.
Analysis of Safety Hazard Factors and Fuzzy Comprehensive Evaluation of Mine Main Ventilator
Authors: Gong Xiao Yan , Gu Xiao Meng , Jiao Wan Ying , Xue He , Zhuang Ze Cheng
Published: September 2016

Forecasting and evaluating the safety of mine main ventilator are helpful to prevent mine ventilation safety accidents from happening. First, on the basis of collecting and analyzing a large quantity of fault information of main ventilator in the nationwide coal mine, the index system was established for safety evaluation of coal mine ventilator. Second, the remark set was set up. Then, weights of safety estimation index of mine main ventilator was determined by using Analytic Hierarchy Process(AHP). With the experts grading method, single-factor matrix of fuzzy evaluation was established. Last, mathematical model of fuzzy comprehensive evaluation was settled for mine main ventilator based on fuzzy theory and used to evaluate the safety of the coal mine main ventilator. The current safety assessment level of coal mine ventilator is “basically safe” and the result can be used to make decisions.
Collaborative Information Research on Fresh Production under Supply Chain Environment
Authors: Wang Yong , Zhang Pei Lin
Published: September 2016

Through the analysis of collaborative development process of supply chain and information system, this dissertation analyses how to achieve the collaboration between fresh supply chain and efficient information system. Meanwhile, it puts forward the concept of collaborative management information system of supply chain. The paper introduces the construction scheme of the collaborative agricultural supply chain management information system. In the end, the paper makes five reasonable suggestions about material procurement, transportation, warehousing, and distribution and information system construction, which with respect to integrated supply information, supplier management and produce-marketing integration.
Design and Development of Fumigation Treatment Bed Based on Simulation Technology
Authors: Xuan Liang , Jiang Heng , Guan Tian Min , Kong Ling Zhe
Published: September 2016

This paper is based on completed the design of the main structure of the fumigation treatment bed according to the size of the human body’s structure. And the solid modeling of each part is carried out in the CATIA environment. Then the working process of the fumigation bed is simulated by using the virtual prototype module of CATIA software. Using the FLUENT flow field analysis software to analyze the temperature field and velocity field of the fumigation tank’s inward under different conditions. With setting different variables in each condition gradually optimize the temperature field and velocity field in the fumigation tank’s inward.
Ultra-High-Precision Machining of Microscale-Diameter Zirconia Ceramic Bars by Means of Magnetic Abrasive Finishing
Authors: Park Nam Jun , Heng Li Da , Wang Rui , Kim Min Soo , Mun Sang Don
Published: September 2016

The paper proposes a new ultra-high-precision machining technique, based on magnetic abrasive finishing, to achieve both high dimensional accuracy and surface accuracy of microscale-diameter materials that are difficult or impossible to machine conventionally. Microscale-diameter zirconia ceramic bars were used as the workpieces, and were machined by means of the proposed technique at different workpiece revolution speeds (1,000, 10,000, 20,000, and 35,000 rpm). Machining depth increased with workpiece revolution speed, and was the greatest for the highest speed studied of 35,000 rpm. The technique also yielded excellent performance in terms of the surface roughness; the initial surface roughness (Ra) of 0.18 µm was decreased to 0.02 µm under machining at 35,000 rpm for 40 s. SEM and AFM micrographs gave evidence of the technique’s high performance.
Indexing of Journals
Authors: Mahaliyanaarachchi Rohana P.
Published: September 2016

Indexation of a journal is considered as a reflection of its quality. Indexed journals are considered to be of higher scientific quality as compared to non-indexed journals, because a journal is indexed by indexing data base authorities only after careful and extensive reviewing process. Further, indexing will help a journal to achieve wider accessibility to the audience and simultaneously improve the reputation of the journal as a reliable source of high-quality information in the relevant field of study.There are number of abstracting and indexing services available throw-out the world. Some are affiliated with institutions such as AGRICOLA maintained by the United States National Library of Agriculture and TEEAL maintained by the Albert R Mann Library of the Cornell University, USA while some are provided by publishers such as Scopus by Elsevier and SCIE by Thomson Reuters. The Directory of Open Access Journals (DOAJ) is an online directory that indexes to high quality, open access, peer-reviewed journals. Today most of the indexing data bases such as AGORA request the indexing of DOAJ as a prerequisite for indexing in their data bases.However today there is a discussion among scholars and researchers which indexation is best and most valid? How to compare the quality of articles published in journals indexed with different indexation services? First, importance of publication of indexed journals is being increasingly recognized by the universities and academic institutions. Second, recently many more indexation services have come up. Are these indexations services equally valid and recognized? Would a journal indexed with any of these databases be considered “indexed”? I would like to open this to discussion among the research community.Currently the JAS has been included in more than 35 journal databases including AGRICOLA, AGORA, Cabi Abstracts, TEEL and DOAJ. It shows the wider acceptance of JAS by international citations and journal databases. This is an indicator for our progress in journal quality during past years. There were many people behind this success. This honour must go to Dr. Chandrika Dissanayake - Coordinating Editor of JAS, Mr Prasad C. Iddamalgoda, Ms Suiox Cummings and Andy Nobes of SLJOL, all the authors, reviewers and editorial committee members.
Assessment of Awareness and Adoption of Fish Farming Technologies in Obio-Akpor Local Government Area of Rivers State, Nigeria
Authors: Olatunji S. O. , Ogunremi J. B.
Published: September 2016

Fish farming has great potentials for ameliorating the problems of youths unemployed, poverty and nutritional deficiencies because it has been found to be economically rewarding and capable of providing vast employment, augmenting farmers’ income and improving standards of living of the citizenry. The study assessed farmers’ awareness and adoption of fish farming technologies in Obi-Akpor Local Government Area of Rivers State. A sample of 87 fish farmers was selected from the population of about 570 through multistage random sampling technique. Structured interview schedule was used to collect relevant research data. Data were analyzed with descriptive statistics (percentage and ranking). It was found that cat fish was cultured by more than 81% of the respondents. More than 72% of the farmers were aware of the eight fish farming technologies under study. More than 71% adopted aerator, flow through system, float fish feed and ova-prim but adoption of pituitary gland and re-circulatory system were at very low ebbs. High cost of feed, erratic power supply, inadequate capital and untimely or unavailability of production information were the major constraints to adoption of fish farming technologies. It was recommended that farmers continue to culture catfish which is hardy, easier to rear and tolerant to stressful conditions. Intervention programmes should be implemented to ensure that farmers adopt technologies whose adoptions were at low ebbs. The Government should subsidize the prices of fish feeds and other inputs while improving the perennial poor power supply.
Development of a Novel Carrot-based Synbiotic Beverage using Lactobacillus casei 431®
Authors: Alwis A.D.P.S. , Perera O.D.A.N. , Weerahewa H.L.D.
Published: September 2016

Lactobaccilus casei 431® is a probiotic microorganism, intentionally introduced into fruits and vegetable juices due to its great activity and survivability. Carrot is comprised with many functional food components such as vitamins (A, C, D, and K) minerals (calcium, potassium, phosphorus, sodium, and iron) and prebiotic compounds (Fructo-oligosaccharide (FOS) and inulin). This research was undertaken to determine the suitability of carrot as raw material for production of synbiotic beverage. The beverage was formulated by incorporating L. casei 431® into carrot juice and fermenting for 0, 2 or 4 h at 37°C. Viable counts of L. casei 431®, pH, total soluble solids (oBrix), titratable acidity, crude fiber, sugars and sensory characteristics were investigated weekly for a period of six weeks under refrigerated (5±1°C) storage. The beverage fermented for 2 h yielded the highest consumer acceptability. L. casei 431® reached 108 CFU/ mL after 2 h of fermentation at 37°C meeting the standards to be considered as a functional food for 6 weeks of storage at (5±1°C). The utilization of FOS by L. casei 431® was minimized with the addition of sucrose and there was no significant difference (p ≥ 0.05) in the amounts of crude fiber during storage. The carrot-based synbiotic fermented beverage could be served as a ready to drink product for 6 weeks under refrigerated storage, meeting the standards (108 - 1010 CFU/ mL) of a functional drink.
Chestnut: from coppice to structural timber. The case study of "Uso Fiume" beams sampled in Liguria
Authors: Togni Marco , Cavalli Alberto , Mannozzi Davide
Published: September 2016

Recently Agriculture Department of Liguria Region had supported studies and researches on the timber quality of living trees in local coppice chestnut forests, with the prospect to produce also timber for structural use. Under some ad-hoc funds a 30 years old coppice forest in the high Bormida Valley, never thinned after the last utilization, has been chosen for sampling. 18 selected trunks were felled and the assortment called “Uso Fiume” (UF) was chosen, getting 49 beams (cross-section from 12¥12 to 24¥24 cm), by way of saw-mill operations The UF-beam is a structural element, derived from Italian tradition. Such elements are used in Italian buildings over the time, in substitution to structural sawn timber, principally for roofing. The UF-beam is a square edged log with wane; more precisely it is a full log, edged on four sides, maintaining boxed heart and an approximately central pith. Today the features of such a beam is established according to the specific Italian standard UNI 11035-3 for spruce and fir and to the CUAP (Common Understanding of Assessment Procedure) n. 03.24/22 for chestnut and conifers. The beams were visually graded according to the Visual Strength Grading procedure and the physical and mechanical properties (density, modulus of elasticity-MOE and modulus of rupture- MOR) were determined according to the standard requirements (EN 408, EN 384, ISO 3131), disregarding the moisture content: the mechanical tests were performed with wood in green state (moisture content M.C.>30%) because it is the actual condition of use in building, due to the very low permeability of the chestnut heartwood which entails long seasoning time of large cross section beams. The study showed very high yields considering the stems-to-beams volume ratio, close to 70%. Characteristics values of the sample resulted: char. density 􀀀 􀀀􀀀kg/m³, char. modulus of elasticity E0,mean 10,3 GPa and char. bending strength fm,k 28,5 MPa. These results can be considered very promising because the data match the Strength Class D24 (EN 338), the same Class as full cross-section chestnut beams (at M.C.=12%).
Harvesting techniques for non-industrial SRF biomass plantations on farmland
Authors: Spinelli Raffaele , Schweier Janine , De Francesco Fabio
Published: September 2016

The goal of this study was to compare the technical and economic performance of terrain chipping and roadside chipping, applied to short rotation biomass plantations. The null hypothesis was that no significant difference are in the performance of the two work systems, when applied to short rotation coppices. Those systems especially designed for non-industrial SRF plantations, were used for conventional logging operations. The difference on the above mentioned systems consisted especially in the chipping location: chipping was performed directly to the field (containers reach the chipper in the field) or at the field’s edge (roadside chipping). Both systems were tested on two of the most common SRF poplar clones in Italy, namely: AF2 and Monviso. Plots were allocated randomly to the two treatment levels ( roadside or field chipping) than blocked for two main clone types ( AF2 and Monviso ) so that each of the 4 treatments level and clone types has a minimum repetition plot of 6 times (total of 24 replications). The Plot were identified with paint markings at the stump so each plot area could be identified at the ground. Net weight of each charge was obtained by a certified weighbridge, so each plot has its own productivity in terms of weight and time consumption. Results were encouraging: harvesting cost varied from 16.3 to 23.2 􀀔 tonne-1, and was lower for terrain chipping and for the most productive clone (Monviso). Despite its higher cost, roadside chipping was preferred for its better terrain capability and for the superior storage quality of uncomminuted biomass. Both systems were suboptimal in their current configurations. They could offer a better performance, subject to minor improvements.
Analysis of a double steering forest trailer for long wood log transportation
Authors: Marinello Francesco , Grigolato Stefano , Sartori Luigi , Cavalli Raffaele
Published: September 2016

A cost effective technical solution of a forest double steering trailer was studied and tested, allowing decrease of radius of curvature and increase of the maneuverability, independently from the length of the transported logs. The steering system improves the so called “stingertype truck” configuration using an articulated frame; through a rearward hinge, the front wheels direction mechanically controls and adapts the direction of rear twin wheels. The study was based on CAD simulations considering the dimensions of the trailer transporting logs with a length up to 12 m. For different log lengths the simulation analyzed the total maneuver area, in terms of minimum curve radius and curve widening. A field test on a prototype operated for transport of long logs along a representative forest road in the Alps was carried out. The results confirm the improvements foreseen by CAD simulations, with allowed curve radius down to 6 m, even with 12 m logs.