bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Perforated Tabs on the Noise Field of an Axisymmetric Jet
Authors: Hussain G. Fayaaz , Nasser Afthab Shaban , Nawaz Mohammad Mohiudeen , Mondal Bikash Kumar , Karthikeyan N.
Published: March 2013

Effect of triangular tabs with circular perforations on the acoustic far-field of an axisymmetric jet issued from a convergent nozzle of exit diameter of 30.16 mm was studied for both subsonic and sonic underexpanded cases. It was found that the noise in the low frequency range (Strouhal number < 0.29) reduced in both subsonic and supersonic jet mach numbers with a penalty in high frequency noise. OASPL plots showed that overall noise levels in subsonic jets increased due to the introduction of tabs except for far downstream angles where the noise levels reduced by 2 dB. Overall noise levels in underexpanded jets decreased in all directions and at all jet mach numbers without the penalty of high frequency noise. Comparison between tabs without perforation and perforated tabs showed that both the tabs were equally effective.
PMSM Control System Based on a Improved Sliding Mode Observer
Authors: Zhang Yu Feng , Li Sheng Jin , Zhou Yong , Zhou Qi Xun
Published: March 2013

In order to improve the performance of sensorless PMSM control system, an improved sliding mode observer (SMO) is proposed in this paper. To decrease the vibration of SMO, a variable switching gain which changes according to the winding currentn is adopted. To improve the estimated value of rotor position, a extra low pass filter (LPF) is employed and the linear interpolation method is used to calculate compensation value of the phase delay caused by LPF. To verify the performance of proposed SMO, a sensorless field oriented vector control system of PMSM is designed. At last, the performance of the improved SMO and the sensorless PMSM vector control system are verified by experimental results.
CFD Simulation of Natural Draught Cooling Tower Wind-Covering
Authors: Darbandi Masoud , Salemkar Hossein , Behrouzifar Ali , Abrar Bagher
Published: March 2013

Past experiences have shown that a local wind can considerably affect the performances of powerplant cooling towers and factory chimneys. In thermal powerplants, the performance of Rankin cycles would reduce if the temperature of its condenser increases. This issue is very important to powerplants located in countries with strong local winds. To remedy the mal-performance of a natural cooling tower in windy conditions, it is required to understand the physics of flow around cooling towers more clearly. One adverse physics is known as the wind covering problem which can drastically affect the natural draught through a cooling tower in windy conditions. In this paper, we focus on wind-covering problem and its adverse impact on a real natural draught cooling tower. Contrary to the past studies, we show that wind can generally affect either positively or negatively in cooling tower performances. Surprisingly, the positive and negative roles can simultaneously occur in most times. In this paper, we use computational fluid dynamics tool to quantify the positive and negative impacts of wind on natural draught flow through dry cooling towers.
Load Analysis of Offshore Wind Turbine Tower Based on Multi-Physics Coupling Analysis
Authors: Huang Xi , Zhu Long Biao , Zhu Zhi Song , Hua Guo Ran , Ji Cai Yun
Published: March 2013

The offshore wind turbine (OWT) tower is the important support of the whole wind turbine components, it is necessary to design and research the tower reasonably in order to ensure reliable operation of the OWT. In this paper, 3MW OWT tower is chosen as the object of study. A gas-liquid-solid model of the OWT tower and its external environment is built using COMSOL Multiphysics software. Combined with the two-phase flow theory of gas-liquid, loads of the tower under the coupling action of wind and wave are computed, which provides a new direction for the load analysis of the tower. The results calculated by this method are closer to the physical truth, which provides a more reliable basis for analyzing the fatigue life of the tower further.
Study on the Field Dynamic Balance of Diesel Engine Crankshaft
Authors: Jiang Shi Xun , Zhang Shi Hai , Yu Zhi Min
Published: March 2013

Abstract：Based on the actual situations of diesel engines, significance of dynamic balance for marine diesel engine crankshaft system is discussed and as well vibration monitoring and field dynamic balance system for diesel engine crankshaft system is constructed. The least square method is applied to fit fundamental frequency vibration signals of crankshaft system and the field dynamic balance strategy is designed on the basis of the influence coefficient method. The feasibility of the dynamic balance system is tested through experiments in the paper.
Calorimetric Analysis of Precipitation in Undercooled Ni-Si Alloy
Authors: Fan Kai , Liu Feng , Fu Bao Quan , Luo Wen Zhong , Zhou Yao He
Published: March 2013

In order to study the precipitaion of Ni3Si particle in undercooled Ni-Si alloy, calorimetric analyses were carried out using non-isothermal measurements by DSC. The scanning electron microscopy (SEM) and the transmission electron microscopy (TEM) measurements were used to describe qualitatively and quantitatively the precipitate microstructures. The non-isothermal DSC thermograms exhibited one reaction peaks and it indicated that the precipitation process is an exothermic reaction. The evolution for the precipitate was obtained in the as-solidified Ni-Si alloy subjected to DT=195K, meanwhile, the precipitate size was found increased with decreased heating rate in the TEM images. The largest precipitate size was about 120nm, and the precipitates still kept spherical shape. Model prediction for the precipitation of Ni3Si particle has been performed. Good agreement with experimental data has been achieved
The Effect of Temperature on the Stick-Slip Friction Behavior of Optical Glasses in Precision Glass Molding
Authors: Mosaddegh Peiman , Ziegert John
Published: March 2013

Understanding the frictional behavior between glass and metals at elevated temperatures is necessary for accurate modeling and simulation of the precision glass molding (PGM) process, and can help in determining the required geometry of molds, inserts, and dies to produce various optical components. In this research, the frictional behavior of N-BK7, an oxide glass, at elevated temperatures in contact with plain steel has been studied. The results show two important phenomena related to temperature. First, the stick-slip phenomenon is more pronounced at higher temperatures close to the glass transition temperature. This is expected since relaxation and creep of glass occur by molecular diffusion, which becomes more rapid as temperature increases. Second, when the temperature is above the glass transition temperature and the glass begins to behave viscoelastically, the stick-slip friction behavior shows an exponential increase in friction force prior to the onset of sliding that is characterized by a jump in the position data on the order of several micrometers, and is consistent with the response of a viscoelastic material to applied load.
The Dynamic Quality Control Method Based on Relation Analysis
Authors: Diao Guang Zhou , Zhao Li Ping , Yao Y.Y.
Published: March 2013

To improve product quality in manufacturing process, a dynamic quality control method based on relation analysis is proposed. With the method, the dynamic regulated principal component analysis is constructed by introducing discount factor to eliminate the autocorrelation via the data, and the limit of multiple control charts is calculated by squared prediction error (SPE) statistics. Then, a dynamic adjusting policy by support vector machine (SVM) is proposed based on control chart pattern recognition. Finally, a case study for applicability is presented to verify the proposed method.
Preliminary Study on Voxel-Based Virtual Geographic Environment Representation
Authors: Jiang Bing Chuan , You Xiong , Xia Qing , Zhang Wei
Published: March 2013

The expression of virtual geographic environment is based on the surface modeling, such as three-dimensional terrain modeling and rendering most of which are based on the polygon grid and 2D textured. In the expression of extreme terrain, such as caves, cliffs, canyons it seems powerless. However, the voxel-based terrain modeling has been more useful than polygon modeling expression in the field of real-time terrain deformation, extreme terrain simulation and geographic process expression. Furthermore, virtual geographic environment based on the traditional surface model is difficult to realistically simulate the real world which is volumetric. This paper analyzes the trends of the geographical environment representation, and discusses the typical voxel-based applications in natural phenomena simulation, terrain modeling and spatial process analysis. It provides the references for the integrative representation of the unified voxel and surface model, and for the construction of virtual geographic environment unified platform.
PDF417 Barcode and its Application in Aviation Spare Parts Management
Authors: Gan Xu Sheng , Duanmu Jing Shun , Gao Jian Guo
Published: March 2013

The necessity of PDF417 barcode technology in application of aviation spare parts management is described. And through the careful requirement analysis and discussion the feasibility of automatic identification system for aviation spare parts management information barcode is also discussed. In addition, the development and design ideas of the production system and application system on PDF417 barcode are introduced. It can be included from the research that, the technology can effectively overcome the drawbacks such as error easiness, low efficiency that the manual input bring on in supply and management for aviation spare parts, and can realize the automatic identification, input and monitoring for aviation spare parts information.
Numerical Study of Batoid with Asymmetrically Undulating Pectoral Fins
Authors: Wu Zhi Jun , Chen Wei Shan , Liu Jun Kao , Shi Sheng Jun
Published: March 2013

This paper presents a numerical study of three dimensional flows around a self-propelled batoid with asymmetrically undulating pectoral fins. During the dynamic simulation, the difference of phase angle of the asymmetric motion is set to 180° between left pectoral fin and right pectoral fin. To evaluate the swimming performance of batoid with asymmetric undulating fins, kinematic and dynamic parameters have been used comparing with that of batoid with symmetric undulating fins. The simulation results show that asymmetric motion can achieve better starting and accelerating performance than symmetric motion.
The Occurring of the Breakage of Parts Made of Creep-Resisting Chrome Steel and Prevention
Authors: Fabianova Jarmila
Published: March 2013

Influence of the technological procedures by process production of the parts and long-term operation on the material features. The formulation and analysis of the most frequent reasons and characteristic of damage on the parts made of creep-resisting chrome steel by breakage and suggestion of the prevention of their occurrence. The result present one of essential presumption for the diagnostics of operational States of products made of creep-resisting chrome steel.
The Operation Monitoring Condition of the Production Machinery and Facilities Using the Tools of Technical Diagnostics
Authors: Šoltésová Stanislava , Baron Petr
Published: March 2013

Technical diagnostics is currently the most important factor of reliability, dealing with forms of disorder manifestation, developing of disorders, their detection and working principles. As tool it has great value in operation and maintenance of facilities. It denotes great interest not only in scientific sphere but also in sphere of results application in the new developing methods and their using in professional practice. Using methods of technical diagnostics taking into account the reliability of measurement results both with new methods IT is one of the main tool for effective management of facilities, elimination of unacceptable conditions and other aspects. The article describes the application of technical and diagnostic tools on workplaces for monitoring behavior of the production machines and facilities.
Monitoring of Operating Conditions of Biomass Combustion Process
Authors: Boržíková Jana , Mižák Jozef , Piteľ Ján
Published: March 2013

This paper describes technical realization of operation monitoring of biomass combustion process. Due to specific properties of biomass fuel and specific demands for economic and ecological conditions of operation of biomass combustion devices, process control system has to be monitored. During process monitoring problem with sensing process variables occurs and that’s why this paper also deals with a method of signal filtration of carbon monoxide and oxygen concentration, because signal includes an interference parts.
Evaluation of Capability of Measuring Device on the Basis of Diagnostics
Authors: Straka Ľuboslav , Čorný Ivan , Kreheľ Radoslav
Published: March 2013

In capability evaluation of measuring devices on the basis of diagnostics, it is important to compare variability of measurement with certain proportion of tolerance zone width of observed qualitative parameter. Determined index of capability of particular measuring device indicates its applicability for inspection of selected qualitative parameters in a given tolerance range. The paper is focused on evaluation of capability of digital micrometer DIGIMATIC within its entire measuring range (0 to 25mm) by the means of capability index Cgm and Cgmk. Evaluation of capability of the given measuring device was carried out by repeated measurements of standards with dimensions representing lower, middle and upper range of the measuring instrument at given accuracy (2μm) of measuring device.
Abrasive Water Jet Cutting of the Steels Samples Cooled by Liquid Nitrogen
Authors: Uhlář Radim , Hlaváč Libor M. , Gembalova Lucie , Jonšta Petr , Zuchnický Ondřej
Published: March 2013

The paper is aimed at abrasive water jetting of non-corroding steels treated by cryogenic temperatures in liquid nitrogen. The investigation of cut walls shows that cryogenic temperatures influence material structure and respective properties. This research is focused on improvement of material reliability in various states of production systems and operation conditions.
Representation of Asynchronous Motor Dynamics by Generalized Kloss Characteristics
Authors: Riečičiarová Eva , Nánási Tibor
Published: March 2013

The paper presents experimental results and mathematical modeling aimed to describe complex machine aggregates working under dynamic conditions. From parameters obtained experimentally the generalized Kloss characteristics is derived for nominal operational speeds of 1,450 min-1, 1,000 min-1 and 750 min-1 under sinusoidal excitation. The steady-state motion is conveniently reinterpreted as an ellipse centered at the working point. Working point is given as the intersection of moment characteristics of the asynchronous motor with the loading characteristics of DC motor with separate excitation. The results of measurements show, that it is necessary to consider the linear dynamic characteristics especially for dynamic response computations near to the resonance.
Tool Logistics in the Centre of Excellence of 5-Axis Machining
Authors: Baránek Ivan , Buranský Ivan
Published: March 2013

Tool logistics is expected for economic and just-in-time production, whereas expensive machine tools require instantly available supplies of the right cutting tools. In this context demand for high tool availability is a need to reduce non-productive times by shortening tool`s set-up times. A solution of the tool logistics depends on a level of automation and integration of manufacturing systems. The article presents current state of the tool logistics system established on the intelligent technologies. It applies general solutions in tool logistics system in the Centre of Excellence of 5-axis Machining at Faculty of Materials Science and Technology in Trnava. There are described some important processes and equipments for their implementation.
Development of the Logistics Support Data Basis System at a Flood Protection
Authors: Kiss Imrich , Sedlák Vladimír
Published: March 2013

The paper specifies the development marks of the logistic support system at a flood-prevention and its mater-of-fact oriented volume with the elements structure which respond to development of the floods risks and menace. The mentions the integration tendencies in up-to-date database information systems by reason of which the logistic processes crisis management of protection and saving in a defined endangered territorial locality will become more effective. Geographical Information Systems (GIS) for generation maps of flood risks and modelling predicted flowage maps are the base of study case. The databases characterizing identity, place and number of persons and elements of the protected interests entities and elements and place of a territorial infrastructure including potential of the disposable humane interests and technical and technological capacities are continued the bases. There is the idea of harmonizing crisis management of a logistic support in real time in the visual map of an operation centre of the integrated safety system by means of using development information base concept in the end of this paper.
The Development of a GPS Based RF Signal Strength Measurement System
Authors: László Méhes
Published: March 2013

Nowadays the wireless communication networks are the bigger part in the communication area. It is very important to choose the best place for the wireless nodes. To support the placement of these devices I wanted to create a signal strength measurement system that I implemented on ZigBee platform with GPS positioning.
A Four-Stage Framework for the Identification of Information Flow Inefficiencies in the Manufacturing Environment
Authors: lo Storto Corrado
Published: March 2013

A four-stage methodological framework useful to analyze the performance of a product development process, with a focus on the information flow inefficiencies is presented. The formal and informal communication exchange between interacting tasks is captured through the Dependency Structure Matrix (DSM) representation, while the properties of the information flow structure are explored calculating metrics of Social Network Analysis (SNA). Information exchange inefficiency of process tasks is calculated performing Data Envelopment Analysis (DEA).
Using Graphic Hardware to Accelerate Pocketing Tool-Path Generation
Authors: Lee Chien Yu , Lin H.S. , Yau H.T.
Published: March 2013

In this paper, we propose a new approach to accelerate the pocketing tool-path generation by using graphic hardware (graphic processing units, GPU). The intersections among tool-path elements can be eliminated with higher efficiency from GPU-based Voronoi diagrams. According to our experimental results, the GPU-based computation speed was seven to eight times faster than that of CPU-based computation. In addition, the difference of tool-path geometry between the CPU-based and GPU-based methods was insignificant. Therefore, the GPU-method can be efficiently used to accelerate the computation while the precision is assured for the tool-path generation in pocketing machining.
Implementation of Face Recognition Based on 3D Image
Authors: Sheu Jia Shing , Shou Ho Nien , Wang Li Peng , Huang Tsong Liang
Published: March 2013

Biometric is used to confirm the unique of identity. In general, face is the most characteristic to recognize a person. In this paper, it is emphasized and compared the quality of 2D and 3D face recognition. There are three parts in this paper. First part is the detection of skin color which is used RGB color space. In order to reduce color red and green which are sensitive to illuminant, Normalized Color Coordinate (NCC) method is chosen to pick up the range of skin color directly. Second, to increase choosing of the important characteristics by Principle Component Analysis (PCA) the wavelength distinguishes technique is used to make 3D images. The third part is about identifying. An improved PCA through a transfer matrix to get optimal total scatter matrix of within-class scatter matrix is used. The optimal total scatter matrix represents the eigenvalue of face characteristics. Finally, the recognition rate and process performance between 2D and 3D images are compared via Euclidean Distance. The efficiency and recognition rate of 3D images are superior to 2D images. The recognition rate of 3D images attains to 92% and costs 0.39 second to recognize each image. It is improved 28% compared with the recognition rate of 2D images.
The Implementation of Sub-1GHz Wireless Personal Area Monitoring System
Authors: Lin Wei Cheng , Lan Ching Chun , Pan Tsung Lung , Lee Long Kun , Yeh Tsung Yu
Published: March 2013

This paper presents the development of a brand new hardware framework of low-cost, tiny and power-efficient wireless monitoring system. The framework of this wireless personal area monitoring system (WPAMS) includes sub-1GHz RFID interrogator subsystem, antenna subsystem and passive RFID transponder subsystem. Compare to other interrogators, sub-1GHz interrogator achieves larger communication range and suffers fewer reflections in the indoor space. The sophisticated commercial transponder can be easily embedded in the personal belongings without any battery inside. In addition, a lightweight three-pass authentication process helps to form a simple point-to-point short-range identification network which makes our monitoring system is superior to other monitoring systems using active communication technologies, such as Bluetooth, ZigBee, UWB, Wi-Fi, and so on. Six experimental scenarios have been developed to demonstrate the performance on item-level identification. By connecting +5.7/5.5dBi right-hand circularly polarized commercial antennas and +1.7dBi linear polarized antenna, under 1 watt power limitation, the proposed WPAMS has successfully identified all the items within 2-meter range. The current PCB size of interrogator is 2-inch×3.25-inch×0.25-inch and can be reduced in the near future.
Cultural Color Inspiration: Learning Color Context in Cultural Reflections
Authors: Chang Tsen Yao , Lin Miao Chen , Huang Kuo Li , Chang Wen Hsin
Published: March 2013

The purpose of this study is to explore creative color teaching activities and their value in education. To understand the teaching method used in color science in university foundation design courses and to lead students to comprehend their own culture in application of design, the study explores solutions and strategies from the perspective of the curriculum. The study is based on the concept of action research used in a course the researcher conducted for half a semester. This study proposes to develop the color sensitivity of students, and to inspire their cultural consciousness for creative color ombination. The conclusion has three principal aspects. First, for curriculum design, the course should integrate issues to explore culture. Students could search for the mark of culture in daily life and flexibly apply their five senses to enhance their observation in color exploration and materials application. Second, for teacher tutorial, teachers should encourage hinking in every step and provide comments or direction. Teachers could implement teamwork activities to motivate the students to be inspired in their creativity. Third, for student learning, in observing culture, self-examination and group participation are essential tools in discussion. Feedback can motivate students to learn, encourage diversity in their abilities, and reach a wider field. The research suggests that chromatics foundation curriculum design should emphasize the importance of course structure and the combination of activities. Connecting the local color survey properly could raise the capability in analyzing a larger project. Moreover, self-examination transforms into the sensibility of cultural aesthetics, and develops the sense of good taste. It arouses the strength of color application, broadens range of knowledge and depth in professional development. Eventually, the learner can develop practical design talents in color acuity and observation.
Numerical Investigation in the Factors on the Pool Boiling
Authors: Hsu Li Chieh , Chen Yong Jhih , Liou Jia Huang
Published: March 2013

A numerical investigation is conducted to understand the factors of influence on a pool boiling in a micro system. The nucleation activities within microlayer were captured clearly to provide details of phase change process. Boiling curve of water under ambient pressure at 1atm is obtained, numerically, which makes good agreements with several experimental results. The effects of ambient pressure, contact angle and surface roughness on heat transfer were also studied, systematically
A Study on the Sleep Forehead EEG
Authors: Lee Yi Yeh , See Aaron Raymond , Chen Shih Chung , Liang Chih Kuo
Published: March 2013

The purpose of this study was to utilize prefrontal EEG to discuss the theta EEG on the sleep quality of good and poor sleepers. Prefrontal EEG was chosen as it was positively correlated with reduced performance on neuropsychological tasks during total sleep deprivation. Hence, two test groups of ten volunteers were taken as test groups of good and poor sleepers. In addition, six tasks were performed using single channel forehead EEG. Results showed that audio stimulation provided the largest difference in theta amplitude between good and poor sleepers. Second, a large difference in the theta amplitude could be observed before and after the audio stimulation for poor sleepers. Third, it was also proven that prefrontal EEG could be conveniently applied for studying poor sleep qualities as it exhibited significant changes in the subject’s prefrontal EEG after biofeedback stimulation. In conclusion, the current research was able to provide significant differences between good and poor sleepers using prefrontal EEG through measuring and analyzing EEG theta wave.
Design of Photo-Induced Biofeedback Fabric and Study of its Influence on Brain Wave
Authors: Chu Wei Cheng , Lin Hsin Ju , Chiu Shu Ping
Published: March 2013

Because of stress and sleeping obstacle for 21th century people, the purpose of this study is to design a home decorative fabric which has the function of releasing from stress and enhancing sleeping quality. The optical fiber were sewn on the surface of optical fabric in form of three kinds of curvature patterns. Guiding the LED light into the optical fiber, the light will emit out of the optical fiber and stimulate our visual system in order to change the form of brain wave. Afterwards, the EEG instrument was used to evaluate the function of stress relaxation of such fabrics. The results were shown that human’s brain wave can be changed from relaxed and sober status to shallow-sleeping status after the stimulation of light emitting from the optical fiber fabrics. For the effect of causing shallow-sleeping status, female is more significant than male. Therefore, the light stimulating visual system by using the optical fiber fabrics can change the form of brain wave and achieve the effect of stress relaxation.
Assessment of Climate Change and the Sustainable Refurbishment of the Northern Paiwan Slabstone House in Taiwan
Authors: Huang Li Mei
Published: March 2013

Climate change has increased the vulnerability of physical environments and natural disasters can cause serious loses. Climate change and the plight of the world's indigenous people of Taiwan, the South Island nation and other aboriginal peoples of the world has been a very popular topic and the similarities and differences of both situations are being discussed; it has been suggested that each country should develop its own system to evaluate the disaster risk caused by climate change. Therefore, this study is based on the climate circumstance that drafts evaluation indexes through literature and now saves the most completed existing slabstone houses as the case, review and experts workshop. Furthermore, this study sorts evaluation indexes through the Fussy Delphi method. Finally, the entire evaluation system includes three themes: climate change factor, physical environment condition, and social economic condition. Indictors include: typhoon season, rainy season, summer, geological hazards sensitive area, awaiting migration of the settlements, and slabstone house renovation system.
Cyberbullying: An Empirical Analysis of Factors Related to Anonymity and Reduced Social Cue
Authors: Wu Wei Pang , Lien Chung Chang
Published: March 2013

This study exams the nature of adolescents’ experience of cyberbullying and determines independently the impact of anonymity and lack of social cues on cyberbullying behavior among middle school students. The preliminary analysis of a survey data collected from middle school students in Taiwan. The results of this study provide support for our hypotheses and explore the effects of anonymity and reduced social cue on cyberbullying behavior of middle school students. This implies that those with high level of anonymity and reduced social cue lead to create high degree of cyberbullying behavior.
Study on Development of Indian Film Industry
Authors: Lee Yi Yeh , Hsieh Meng Jhe , Fan Kuo Kuang
Published: March 2013

Since movies were introduced into India, they have become one of the key industries in the country. Besides the wide support in the local market, Bollywood films have started to stand out on the world stage. There are 3.6 billion international audiences of Indian films. Different from Hollywood movies which we are familiar with, Indian films reveal strong national culture. This study probes into the success factors of Indian films by literature review on the development of Indian films, special film culture and policy of the Indian government, and generalizes the following success factors of Indian film industry: high population, ticket price & low cost, local cultural environment, governmental policy, and combination of tradition and innovation. This study analyzes the factors above and compares the related factors with American films.
Stress Redistributions Due to Creep Behavior and Seismic Response of Model Geosynthetic Reinforced Soil Retaining Structures
Authors: Chao Sao Jeng , Hwang Howard , Cheng An
Published: March 2013

Geosynthetic reinforced soil retaining structures (GRSRS) become popular in the recent decades because of the advantages of easy construction, consuming waste soil in the construction site, supreme seismic resistance ability, etc. For the reason that clayey soils cover a wide area in Taiwan, clayey soils are often used as the backfilled materials for the GRSRS. Besides, during the 921 Chi-Chi Earthquake, a few GRSRS were destroyed. Consequently, the dynamic analysis of GRSRS turns out to be another significant research topic. In this paper, we investigate the creep behavior and the seismic response of model GRSRS by using finite element simulation. The predicted results indicated that the tensile stress of the reinforcement is increasing with time as well as under earthquakes. The tendency of the incremental tensile forces due to the clayey backfill soil creep behavior is significant in the initial stage but slows down with time goes on. Observing the predicted results of the GRSRS under different earthquake scales, it is found that the acceleration variations and the tensile force distribution of the reinforcement layers can not be evaluated with a simple factor.
Jaw Crusher Based on Discrete Element Method
Authors: Mu Fu Sheng , Li Hui , Li Xing Xue , Xiong Hong Zhi
Published: March 2013

In order to analyze the force condition and crushing power of crusher teeth plate, the discrete element method models of jaw crusher and double-cavity jaw crusher are set up respectively using EDEM, a kind of software for discrete element analysis. Meanwhile, the working process, the loading force on the teeth plate and crushing power are simulated. The results show that: the rationality of the DEM simulation is declared, and the crushing process of the particles is also shown intuitively. The loading force condition and the crushing power of the moving jaw teeth plate serve as basis for its abrasion and energy consumption respectively.
Optimization Design of Feeding Unit of the Forward Type Flute Laminating Machine
Authors: Xie Run , Cai Ji Fei , Chen Jia Cong
Published: March 2013

For paper forward unit of the current forward type flute laminating machine, the contact surface of the paper forward unit may damage paper during high speed paper forwarding. In view of this phenomenon, a solution is proposed through the study on the feeding unit of the flute laminating machine. In this paper, the corresponding sprocket driveshaft is controlled by a servo motor to slowly forward paper at the beginning and accelerate its forwarding speed gradually, until the entire feeding process is completed. In this way, the problem of paper pile-up and damages during the paper forwarding process can be solved, while matching backing paper feeding, so as to improve the feeding accuracy of the full-automatic flute laminating machine and hence its laminating accuracy.
Characteristic Analysis of Side Impact of MDB and Rigid Column of Automobile
Authors: Wang Xi Ting , Zhao Yi Feng , Li Xue Jiao
Published: March 2013

Aimed at the design mathematical modeling of a certain brand of automobile, the finite element modeling of the whole car was built with the help of HyperWorks software based on FEA principle. According to the C-NCAP and E-NCAP principles and in the environment of LS-DYNA, the paper did a computer simulation of the side MDB impact and side rigid column impact to the car. From the perspectives of the invasion, invading velocity and invading acceleration of pillar B and the door, as well as the whole car conversion of energy, the paper evaluated the effects of the two impact simulation experiments and contrasted the simulation results of these two impact experiments, which helped study the different impact characteristics and further improve the side impact security of this car.
Research of Unpowered Cleaning Equipment for Blanket Cylinder
Authors: Lv Chuan Dong , Cai Ji Fei , Xie Run
Published: March 2013

In order to enhance the cleaning speed, reduce the cleaning cost and solve other problems of the existing cleaning equipment for blanket cylinder, we put forward a new-type unpowered cleaning equipment for blanket cylinder after a comparative analysis between powered spurt brush type cleaning equipment and unpowered cleaning cloth type cleaning equipment with respect to their structures and characteristics. Furthermore, after we study the cylinder structure of printing press and the cleaning effect of the existing cleaning equipments, a spurt brush type is proposed. We obtain the optimal pressure of this cleaning equipment through repeated experimental analyses on the pressure exerted by brush roller on blanket cylinder. The velocity parameter is determined by analyzing the cleaning principle of brush roller.
Study on Energy Saving of Hybrid Hydraulic Excavator
Authors: Wu Wen Hai , Ke Jian , Liu Huan Long , Yang Yu Lan , Zheng Hui
Published: March 2013

For the high energy consumption and poor emission of a medium-sized hydraulic excavator, energy consumption point is analyzed combined with the advantages of the electric hybrid system. The energy recovery schematic of the system is designed. Mathematical models of the slewing system are established and theoretical simulation is conducted, and it is compared with the traditional structure. The velocity, displacement, and energy consumption curves of the two systems are concluded under the same conditions. The comparison shows that: energy saving of the electric hybrid slewing system is 37.27% compared with the traditional system. And the electric hybrid slewing system has the characteristics of the better control function and the higher energy utilization.
Kinematical Analysis of Dismount of Double Salto Backwards Stretched with 2/1 Twists
Authors: Zhou Ji He
Published: March 2013

The aim of this study was to revealed the top-notch gymnast Kai Zous dismount of double salto backwards stretched with 2/1 twist. The findings showed that (1) at flight phase, (a) kinematics parameters had slightly different at off-bar moment in 2011 and 2012, (b) flight posture fitted with gymnastic rules, (2) at landing phase, (a) the lower limbs of Kai Zou didnt stretch, it was unfavorable for the following buffering, (b) his hip joint angle was smaller and knee joint angle was larger after landing in 2012, and these were favorable for the finish of buffering element, it will increase the horizontal distance of C.G. and improve stability of landing, (c) mean hip joint angle was 117.9o at landing, the buffering time was 0.215s.
Testing Technology of Dynamic Road Friction Coefficient
Authors: Zhang Peng , Cui Li Lin , He Le , Xia Qun Sheng
Published: March 2013

The dynamic road adhesion coefficients at 30km/h and 50km/h for dry condition were measured through the real vehicle equipped with a test system driving on the asphalt dry road. The test system included the fifth wheel instrument, the wheel speed sensors, the programmed strain amplifier and ACME portable industrial personal computer. The results show that longitudinal peak adhesion coefficients at 30km/h and 50km/h for the dry condition are about 0.7. Longitudinal adhesion coefficient increases rapidly with the slip rate increasing and soon reaches the maximum. The longitudinal peak adhesion coefficient occures when the slip rate is about 12%.
Analysis of Fatigue of Cylindrical Roller Bearing in Printing Press
Authors: Wu Ji Mei , Chen Yan , Gao Bo , Yi Tuan Yong
Published: March 2013

By means of considering improved Lundberg-Palmgren (L-P) fatigue life theory and rollers and other comprehensive factors, a model of fatigue life is setup for eccentric double row cylindrical roller bearing under rotation. On this basis, the calculation flow chart is given and the fatigue life is calculated. Then come to the conclusions that the fatigue life of bearing is influenced by radial load, rotating speed, radial clearance.
Research on Vibration Bench of Vehicle Suspension by Finite Element
Authors: Liu Xian Yu
Published: March 2013

By establishing and analyzing mathematical model for vibration bench of vehicle suspension, this paper optimized and simulated vibration bench of vehicle suspension based on finite element. As a result, the paper got stress field and its distribution during transformation process and set a foundation for structural design of vibration bench of suspension.
Analysis of Steel Rope Shock Absorber Amplitude Frequency Characteristics under the Basic Excitation
Authors: Zhao Yan Ping , Zhao Zi Long , Lu Guo Yun
Published: March 2013

In this paper, the differential equations of the steel rope shock absorber are established under the basic excitation, using the Fourier series expansion method and the Harmonic balance method, the corresponding frequency response equations are derived, then their numerical solutions is got, and the influence of the mass, damping, stiffness, and hysteretic force on the frequency response characteristic is analyzed under the basic excitation. It can be drawn by analyzing and comparing. Under the basic excitation, with the basic simplified mass increasing, the natural frequency will decrease, while the resonance amplitude will increase. With the steel rope damping, stiffness and the foundation damping increasing, the natural frequency will not change significantly, while the resonance amplitude will decrease. With the foundation stiffness increasing, the natural frequency and the resonance amplitude will increase significantly. The equipment mass and steel rope hysteretic force have no significant effect on the frequency response characteristics.
Rotor Dynamics Analysis of the Flywheel Energy Storage System
Authors: Li Guang Xi , Zhang Yin Shan , He Lin , Yang Li
Published: March 2013

In this paper, a dynamics model of flywheel rotor - support system is build. Obtained the dynamic characteristics of the flywheel rotor by finite element method .The results indicate that the rotor system is stability and security. This provides the basis for the subsequent optimization of flywheel rotor.
Influences of Raw Materials and Concentration on Properties of Natural Cellulose Films
Authors: Li Dong Na , Ma Xiao Jun , Qiao Hua
Published: March 2013

To study the effects of different raw materials and concentration on properties of natural cellulose films, the dissolution of different raw materials and propyl gallate (PG) in N-methylmorpholine-N-oxide (NMMO) by rotary vacuum evaporation machine were operated, and glycerol was used as plasticizer. The results show that the mechanical properties, oxygen barrier, moisture barrier, transparency of the films which used cotton pulp as raw materials are superior to wood pulp and reed pulp. Cellulose concentration increase from 5% to 7%, the elongation, oxygen permeation flux, water vapor permeability, light transmittance decrease by 17.2%, 1.4%, 4.4%, 16.6%, respectively, the tensile strength of cellulose film increases by 103.1%.
Synthesis of Flame Retardant of Melamine Phosphate
Authors: Xie Kai Ming
Published: March 2013

This paper was reported a method of making intumescent flame retardant from pentaerythritol, Phosphorus oxychloride and melamine, The effects of molar ratio, reaction temperature and time on the reaction were obtained ,and the best reaction condition was established : the molar of PDD and melamine is 1:2.5, reaction temperature60°C, reaction time about 10h, the yield was 82%.
Interference Character Analysis of Multi-Ring Composite Flywheel Rotor
Authors: Li Guang Xi , Ding Zhao , He Lin , Yang Li
Published: March 2013

In order to improve the radial strength of energy storage flywheel, this paper design and analyses the multi-ring flywheel rotor in different conditions by finite element method. From the results, we can confirm that interference condition is critical influence on the stress gradient of the rim. The results can provide a guide for high energy density multi-ring composite flywheel rotor design.
A Brief Discussion on Nucleophilic Substitution Reaction on Saturated Carbon Atom
Authors: Ding Yan
Published: March 2013

Nucleophilic substitution reaction is an important reaction of haloalkane. By such a reaction, halogen functional group can turn into various other functional groups. Therefore, it is widely used in organic synthesis and there are many researches on its reaction mechanism. Hydrolysis reaction of bromoalkane is especially a nucleophilic substitution reaction that is studied quite fully. This paper mainly discusses the nucleophilic substitution reaction on saturated carbon atom.
Study of Cyclical Fluctuation during the Paper Transmission of Inkjet Printing System
Authors: Liang Yan Mei , Cheng Chang Xian , Wang Zhao Xia
Published: March 2013

With the gradually maturing super-speed inkjet printing technology, people are pursuing steadier and higher speed as well as better quality presswork for the sake of increasing economic benefit. To provide an overview of the velocity fluctuation of the inkjet machine platform and the cyclical fluctuation of the incremental encoder, external clock and corresponding internal clock were applied separately to print the equally spaced lines under the same platform speed. Then a magnifier was used to measure distance between the lines, according to which the velocity fluctuation mentioned above can be obtained. Thus conclusion can be drawn from the fluctuation analysis that the velocity cycle of platform is 60mm, however, number of those produced by the incremental encoder is up to 3, including 60mm influenced by the platform, 300mm produced by the perimeter of encoders pressure wheel and 600mm produced by the circumference of dance roller. Furthermore, dance roller contributes more influence on narrow coated paper. Through this research, inkjet technician can do directional compensation for every factors to reduce the fluctuation.
Research and Application of Integrated Electronic Commerce Platform in the Steel Industry Chain
Authors: Zhang Hong , Wu Ping , Li Zhen , Zhang Dong
Published: March 2013

In the 21st century, with the further deepening of informationalization, competition among the steel industry chain has gradually upgraded to that of its e-commerce service. On the basis of bus-based industry chain theory, the architecture of integrated e-commerce platform in the steel industry chain is built. The platform involves upstream and downstream enterprises, including manufacturers, processing centers, trading companies, third-party logistics companies, and customers, etc. different from previous decentralized model of e-commerce platform, through the integrated e-commerce platform, customers can complete all business with one-stop, and improved their service perception and satisfaction. And new model is more promoted and implicated in other industry. The system has been applied in the enterprises, and the result is very good. The bus-based integrated e-commerce platform will become one of the paths for enterprise to further development.
New Algorithm for Ink Trapping Ratio Based on Transmittance
Authors: Xu Yong Chi , Zhou Shi Sheng , Xu Jin Lin
Published: March 2013

To reflect the relationship between the trapping effect and colorimetric value of prints, this paper establishes an algorithm to calculate the ink trapping ratio. The new algorithm assumed that the second ink of two-color overprint solid forms an evenly distributed and thinner ink layer by keeping the total ink volume as constant and it employed the transmittance of single solid ink and overprint solid to compute the ratio of the thickness of the second ink layer printed on the first ink layer and on the blank paper on basis of Lambert's law. Because of the difficulties of measuring the transmittance of prints, it used the Clapper-Yule model to calculate them. To evaluate it, the ink trapping ratio computed by the densitometry method and the new algorithm for two sets of two-color overprint solid were adopted to predict the spectral reflectance of them. By comparing the CIELAB color difference between the calculated and measured value of spectral reflectance, the proposed new algorithm is precisely defined and it improves the calculation accuracy of ink trapping.
Study of Powder Removing Technique for Film Laminating
Authors: Zhang Yang , Cai Ji Fei , Zou Kang Le
Published: March 2013

According to the result of survey and research, the device combining powder sweeping and powder sticking is used for powder removing. Powder sweeping section is to use three soft brush rollers, covered with a large air suction device. Powder sticking section is to use a rubber roller and a hot pressing steel roller, with a hard brush roller which can sweep the powder on the rollers surface, extracting the powder to the filter device via exhausting pipe.
PS Plate Cuttolength Cutting Based on Flying Cutter
Authors: Zhao Hong Yan , Zhang Jun Bao
Published: March 2013

To discuss the flying cutter used in PS plate production line.From mechanical and control two aspects to optimization improvement, in order to adapt to the cutting requirements. For new control scheme, in the theoretical derivation and actual operation were introduced, the new scheme in the actual operation of the encountered problems were analyzed, and the method of solution to meet the Plate material. Through the practical application and theoretical checking, proves the validity and feasibility of the scheme.