bluuebunny/crossref_metadata_2025 huggingface dataset:
Formation and Evolution of Liquid Pools Entrapped within Primary Particles of In Situ Mg2Si/AM60B Composite with Fine-Grains during Partial Remelting
Authors: Zhang Su Qing , Chen Ti Jun , Ma Ying , Li Yuan Dong , Hao Yuan
Published: November 2013

The formation mechanism and evolution of liquid pools entrapped within solid grains have been investigated during partial remelting of in-situ Mg2Si/AM60B composite with fine-grains during partial remelting. The results indicate that the merging of dendrite arms during the initial stage of partial remelting is the main cause for the formation of the entrapped liquid pools. In view of phase transformations, the formation of the entrapped liquid pools is attributed to the reactions of α+β→L and α→L, essentially. The evolution of the liquid pools during latter heating can be divided into two stages: the agglomeration of each others and connection with intergranular liquid.
Analysis of Lubricating Oil Deterioration in Four-Wheeler
Authors: Bhosale A.A. , Joshi Ketaki , Karadkar Trupti , Mangidkar Khushbu , Mundhe Pradnya
Published: November 2013

Lubricating oil used in vehicles deteriorates over the period of use, due to various causes. These include, high temperatures, great variety of contaminants like carbonic acid etc [1]. Deteriorated oil must be changed periodically, to ensure smooth performance of vehicle. Changing the lubricant too early, cause inefficient use of already depleting resources, also unwanted impact on environment. However, changing the oil too late may affect vehicle performance. Hence to compromise between these two necessities, optimum oil change point must be found.
Design of a Hybrid 5-Axis Machine Tool with Fused-Deposition-Modeling Capability
Authors: Lee Wei Chen , Chung Shan Chen
Published: November 2013

The objective of this paper is to present the design and fabrication of a hybrid 5-axis machining and rapid prototyping machine tool. The rapid prototyping used for this machine was fused deposition method. The extruder of the fused deposition method and the cutting spindle were installed on each end of the rotary axis respectively to reduce the complexity of this machine. Preliminary experimental results demonstrated that the machine can increase the accuracy of the product made by low-cost fused deposition method.
Study on the Inspection & Planning System for Sheet Metal Parts Based on its Three Dimensional Model
Authors: Hua Lei , Wang Dong , Hao Bo , He Li
Published: November 2013

Aiming at the short comings and limitations of traditional inspection method of sheet metal parts, the inspection solution based on the three dimensional model of sheet metal parts was described in this paper. According to the shape, size, accuracy requirements and so on, the system can give different inspection method. The inspection result will be achieved and the system can judge if the measured sheet metal part is qualified. The characteristics of this system are high accuracy, environmental protection and high efficiency.
The Research on Natural Characteristic and Eigensensitivity of Ravingneaux Compound Planetary Gear Sets
Authors: Qian Bo , Wu Shi Jing
Published: November 2013

The dynamic model of Ravingneaux compound planetary gear sets has been built. Then the Natural frequency and vibration model have been solved in the Ravingneaux compound planetary gear sets. The eigensensitivity to parameters have been researched based on the dynamical model. The varying trend of natural frequency according to the varying of parameters have been researched, which include gear mass (sun gear, ring gear , or planet gear), the moment of inertia of gears, the support stiffness , the torsional stiffness.
Terminal Area Energy Management Trajectory Planning for an Unpowered Reusable Launch Vehicle with Gliding Limitations
Authors: Zhou Min , Zhou Jun , Guo Jian Guo
Published: November 2013

RLVs' gliding capability, determined by its maximum dive and maximum range, provided a significant restriction in TAEM trajectory planning in this paper. The maximum-dive trajectory was generated based on Eq.(3) for a constant maximum dynamic pressure. In the guidance, it was optimized to be Eq.(13) for the open-loop command of bank angle in HAC segment. The simplified closed-loop command of angle of attack contained errors of altitude and path angle except the controlled velocity. Energy propagating as Eq.(8) calculated the reference velocity for the speed brake to track. Finally, an illustrative example was given to confirm the efficiency of the trajectory planning algorithm and optimized command. The simulation results in Fig.2 and Fig.3 indicate the proposed trajectory planning algorithm and guidance method are useful for the gliding capability limited RLV's TAEM with initial deviations.
Comparison of Two New T-Shape Standing-Wave Ultrasonic Motors
Authors: Hou Xiao Yan , Lee Heow Pueh , Ong Chong Jin , Lim Siak Piang
Published: November 2013

This paper compares the performance of two newly designed ultrasonic motors. Based on the finite element analysis, it is found that the motor with piezoelectric stack as functioning components can produce much better mechanical output properties.
Synthesis of Y2O3 Nanoparticles by Modified Transient Morphology Method
Authors: Amirabadizadeh Ahmad , Momeni Larimi Zobedeh
Published: November 2013

Yttrium oxide nanopowder has been successfully synthesized by a modified transient morphology. In the first step, a foamy structure was produced by combustion synthesis using yttrium nitrate and glycine. This was followed by the addition of sulfate ions and calcination at 1100 °C for 4 h. The sulfated powders were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM). The XRD pattern shows Y2O3 single phase after calcination. The TEM images confirm the nanometric size of the particles in the range of 40-100nm.
Flow Pattern and Efficiency Changes of Squirrel Cage Fans due to Inlet Diffuser Diameter Changes - Using CFD Method and Experimental Validation
Authors: Gholamian Mojtaba , Rao Gurram Krishna Mohan , Bhramara Panitapu
Published: November 2013

Inlet is one the basic elements of squirrel cage fans that has a significant effect on fan performance and efficiency. Recently using the CFD calculation methods with sufficient related tools for finding the flow pattern and related parameters, applying modifications and representing proper solutions, has being increased. In the present case study to study the effect of inlet diffuser diameter on the fan efficiency and flow pattern, using numerical simulations and experimental validations, three different inlet diffuser diameters are used as inlet instead of inlet nozzle. To simulate these cases some geometries with special additional element, proper mesh pattern and size and proper turbulence model was chosen.It is observed performance and efficiency curves of fans with respect to use of inlet nozzle are more flattened with higher magnitude. So fan operation around the best performance point is more stable without significant fluctuation of head pressure and efficiency.
Investigation on Structure & Dynamics of Rail Flaw Detection Vehicle
Authors: Yuan Qi Gang , Zhang Ji Min , Man Li Wen
Published: November 2013

The rail flaw detection vehicle which is according to a city rail system construction features has been developed. This vehicle has been used for more than two years and all aspects of the vehicle performance reaches design requirements. The vehicle can meet the demand for rail flaw detection. This paper has introduced the general layout of this vehicle including main technical parameters, the main structure and the rail flaw detection system. Finally, the strength and dynamics calculation of this vehicle has been performed. The results of the calculation are presented and discussed.
Applied Research on Reliability Evaluation of CNC Machine Tools Based on D-S Evidence Theory
Authors: Yu Jie , Tang Wu Sheng , Wang Ting Ting , Li Qiao Chan , Li Zhan Guo
Published: November 2013

Reliability is most important to the CNC machine tools and reliability estimation is a very important part of the reliability which has magnificence to allocate resources and put forward scientific policy. Reliability evaluation of computer numerical control machine tools can use all sorts of effective information to decrease the size of test samples and save the development costs and shorten the production cycle. The paper put forward to use D-S evidence theory and the information of experts system to decrease the uncertainty of the reliability evaluation of computer numerical control machine tools. The results show that the method can effectively decrease the uncertainty of the reliability evaluation of computer numerical control machine tools.
Stamping Die Design of a Kind of Textile Machine Needle
Authors: Hu Xin Ping , Wang Guan Ying
Published: November 2013

This paper introduces a stamping die design of a kind of textile machine needle. According to the size,material and mass production requirements of needle, the blanking technological property of parts are analyzed, and its general principles, methods and steps of die design are introduced. The structure of stamping die is gap-frame press, and JB23-25 is selected to do the work. The dimensions of cutting edge and dimensional tolerance are calculated. Finally designing components, checking stamping equipment and drawing assembly diagram are finished. This stamping die is mainly composed by punch die and concave die, positioning parts, discharge unit, die set, stamping machine and fasteners.
The Structural Design and Analysis for the Box-Wrench’s Hot Extrusion Die
Authors: Hu Xin Ping , Diao Wei Long
Published: November 2013

Box-Wrench is a tool widely used in industry and especially suitable for screwing the bolt and the nut in the place where the space is very narrow and dent. In this paper, a process of hot extrusion box-wrench was presented. The structure of hot extrusion die and its working process were discussed. The feasibility of the process and the workability of the die were analyzed with Finite Element Analysis. The external diameter and the length of the box-wrench are designed according to the equipment's shape and size, the box-wrench's structure should be relatively flexible. How to manufacture the box-wrench in high efficiency and with high quality is the most important question of the box-wrench producing.
Design of the New System of Verify Gas Relay
Authors: Liu Kan , Xiao Xin , Zhang Jun Zhe
Published: November 2013

Oil-immersed transformer is the use of transformer oil as an insulating and cooling medium. The gas relay protects the transformer by detecting the methane,and plays a crucial role in the safe operation of the power system. Verify gas relay system has these advantages: automatic test, easily operation, and the calibration precision is high. This paper introduces the design of the gas relay verificaton system based on STM32F107 chip. The mechanical principle, the hardware and software flow chart are described also.As a demonstration, we show the test results using this system.
Performance Enhancement of a Stack Ultrasonic Motor Using PZNPT Material
Authors: Hou Xiao Yan , Lee Heow Pueh , Ong Chong Jin , Lim Siak Piang
Published: November 2013

This paper investigates the performance enhancement of a newly designed stack ultrasonic motor by using PZNPT material. Based on the numerical simulations, it is concluded that PZNPT can greatly improve the mechanical performance of the motor.
A Comparative Analysis of Three-Phase, Multi-Phase and Dual Stator Axial Flux Permanent Magnet Synchronous Generator for Vertical Axis Wind Turbine
Authors: Khan M. Shahrukh Adnan , Rajkumar Rajprasad K. , Rajkumar Rajparthiban K. , Aravind C.V.
Published: November 2013

In this paper, the performances of all the three kinds of Axial type Multi-Pole Permanent Magnet Synchronous Generators (PMSG) namely Three-phase, Multi-phase or Five Phase and Double Stator fixed in Vertical Axis Wind Turbine (VAWT) were investigated and compared in order to get an optimal system. MATLAB/Simulink had been used to model and simulate the wind turbine system together with all the three types Permanent Magnet Generators. It was observed from the result that with the increasing number of pole in both low and high wind speed, the five phase generator produced more power than the other two generators. In general, it was observed that the responses of the Multi-phase generator at both high and low speed wind showed promising aspect towards the system followed by Dual Stator. But with the change of the variables such as wind velocity, turbine height, radius, area together with the generator pole pairs and stator resistance, the optimum system should be chosen by considering the trade-off between different configurations which were firmly analyzed and described in this paper.
Design, Modeling and Finite Element Static Analysis of a New Two Axis Solar Tracker Using SolidWorks/COSMOSWorks
Authors: Ferroudji Fateh , Ouattas Toufik , Khélifi Chérif
Published: November 2013

This paper presents the now design, modeling and static analysis of a new two-axis solar tracker (Azimuth and Altitude). The tracker is an electro-hydraulic device that keeps photovoltaic panels in an optimum position perpendicularly to the solar radiation during daylight hours. The tracker of 24 m² panel’s size was designed using the SolidWorks 3D CAD software. The finite element method (FEM) is adopted to ensure the stability and the reliability of the tracker. COSMOSWorks was used to determine displacement, equivalent stress and safety factor of the tracker under its own weight and wind load critical, namely wind speed of 130 km/h. Simulation results show that the maximum displacement of the structure is 1.18 mm, the level of the maximum equivalent stress is 74.43 MPa and the safety factor is about 3. The tracker structure completely satisfies the design requirements.
Modeling and Static Analysis of an Areogenerator Savonius Cracked by Using SolidWorks/CosmosWorks Software
Authors: Khelifi Cherif , Ouali Mohammed , Ferroudji Fateh , Adjilout L.
Published: November 2013

The increasing complexity of rotating machinery and atrocity competitions of current industrial sectors to launch a new designs on markets or to improve products quality and to reduce design cycle and operating cost, request overload use of the computer industrial software. The presence of cracks in the frameworks may lead to a dangerous and catastrophic effect on the static behavior and cause serious damage to the system. However, modeling and static analysis of frameworks is also a crucial stage preliminary to the fabricate process. It is allowed to predicting performances, optimizing system design and checking its rigidity, stress in most significant points. This paper aim to use ¶SolidWorks (SW) and COSMOSWorks (CW) solvers for modeling Savonius aerogenerator with and without cracks and to simulate its static behaviors by Finite Element Analysis (FEA) under its free weight and critical wind load of 30m/s. Statics strain and stress obtained are strongly influenced by the presence of cracks on the weld sides of the wind turbine. However, the presence of one crack sized of 0.5mm in the system increased respectively VonMises stress of 9.26%, displacement of 0.8%, strain of 19.95% and reduced the security factor of 9.24%.
Rapid Solidification and Phase Composition of Gd-16wt%Co Alloy in Laser Melting Conditions
Authors: Yao Wen Jing , Zhang Feng Jie , Lu Zhe , Wang Nan , Jung Yeon Gil , Lee Jeh Yun
Published: November 2013

Solidification microstructure of Gd-16wt%Co master alloy is characterized by the primary (Gd), CoGd3, and Co7Gd12 dendrites plus (Co3Gd4+Co7Gd12) eutectic. In the laser melting conditions, the rapid solidification of melting pool shows three layers along the radial direction. The size of melting pool decreases with the increase of scanning speed. The dendrites are refined and the eutectic disappears in the pool. Near the top of the pool, the metastable phases and the peritectic reaction are restrained in the rapid solidification conditions.
Research on Nonlinear Modeling for Power Transformer over Wide Frequency Range
Authors: Zhang Zhong Yuan , Ge Xin , Wang Zeng Chao
Published: November 2013

This paper proposes a new nonlinear broadband model of the power transformer which is both fit for steady state and transient simulation in power system. The model consists of high-frequency module and low-frequency module in parallel. Based on the black-box method, the high-frequency block is built in the form of π-type equivalent circuit, and the low-frequency block is in the form of conventional gamma-type circuit, in which core saturation characteristic is expressed by a nonlinear inductor. A power transformer is studied in the laboratory, simulations and experiments are carried out in case of power-frequency steady state, excitation currents distortions, lightning overvoltage, and very fast transient overvoltages (VFTO) respectively. The comparisons between the simulated and measured results verify the feasibility and validity of the model.
An Improved Calculation Method for the Wide Frequency Admittance Parameters of Transformer Based on FEM
Authors: Zhang Zhong Yuan , Zhang Xu Dong , Gao Li Ming
Published: November 2013

The calculation of the admittance parameters of the power transformer is the basis of establishing its black-box model and studying its freqency response analysis. An improved calculation method for wide frequency admittance parameters is proposed based on multi-conductor transmission lines model, combined with the finite element method. Firstly, multi-conductor transmission lines model of the transformer windings is established. In order to reduce the order of the parameter matrix, several turns which are continuous in capacitive coupling are treated as a transmission line by applying finite element method. Then after the boundary conditions are applied to the model, zero and non-zero values of the matrix are separated to calculate respectively, which avoids the complex equation solution of the previous calculation method, as well as improves the computational efficiency. At last, a 10kV single-phase two-winding transformer is measured. By the comparisons of the calculated and the measured results the method is proved to be validation.
Review of Smart Grid Demand Response with Clean Energy Access
Authors: Wang Zhi Qi , Leng Yue
Published: November 2013

The smart grid has expanded the capacity of clean energy, has made the power grid load consume clean energy reasonably, it can realize the maximization of social benefit, it is a scientific problem to be resolved in the field of energy. This article will apply the interruptible load to the power system with wind power, study the significance of the interruptible load, summarize the research and practice of clean energy carried out at home and abroad, consider the impact of the wind machine on power grid after it is connected to the grid, finally put forward the power package by analyzing the method of the demand response.
A Study on Generating Electricity by Using Exhaust Waste Heat in a Diesel Engine
Authors: Aydogan Hasan , Ozcelik A. Engin , Acaroglu Mustafa , Işik Hakan
Published: November 2013

Internal combustion engines are widely used in our day. Internal combustion engines first transform fuel energy into heat energy. Afterwards, approximately 30% of this heat energy is transformed into mechanical energy. Approximately 5% of the heat energy is expelled through friction and radiation, 30% through cooling and 35% through the exhaust system. In the present study, electricity was generated by using thermoelectric equipment and the waste heat expelled from the exhaust system. It was observed that as the exhaust temperature increased, the amount of electricity generated also increased.
Total Harmonic Reduction Using Switching Frequency in H-Bridge Cascaded Multilevel Inverter
Authors: Dhal P.K. , Rajan C. Christober Asir
Published: November 2013

This paper presents total harmonics elimination in H-bridge Multi-Level Inverter. The basic concept of this reduction is to eliminate harmonics in different level with an appropriate choice of switching angles. This paper employs Homotopy algorithm to solve the transcendental equations for finding the switching angles. This method solves the nonlinear transcendental equations. It is much simpler formulation without complex analytical calculations for any number of voltage levels. In this technique, it is not required transformer allows the use of a single dc power source (e.g., a battery or a fuel cell stack) with the remaining n − 1dc sources being capacitors, which is referred to as hybridcascaded H-bridge multilevel inverter (HCMLI). It has several informative Mat lab simulation results verify the validity and effectiveness of the proposed algorithm.
Electrical Characteristics of n-Type Nanocrystalline FeSi2/Intrinsic Si/p-Type Si Heterojunctions Prepared by Facing-Targets Direct-Current Sputtering
Authors: Promros Nathaporn , Funasaki Suguru , Iwasaki Ryūhei , Yoshitake Tsuyoshi
Published: November 2013

n-Type nanocrystalline FeSi2/intrinsic Si/p-type Si heterojunctions were prepared by FTDCS. In order to estimate their diode parameters such as ideality factor, barrier height and series resistance, their current-voltage characteristics were measured in the temperature range from 300 to 77 K and analyzed on the basis of thermionic emission theory and Cheungs method. Based on thermionic emission theory, the ideality factor was calculated from the slope of the linear part from the forward lnJ-V characteristics. The barrier height was calculated once the saturation current density was derived from the straight line intercept of lnJ-V plot at a zero voltage. The obtained results exhibit an increase of ideality factor and a decrease of barrier height at low temperatures, which might be owing to inhomogeneity of material and non-uniformity of charge at the interface. Based on Cheungs method, the ideality factor and barrier height were estimated from y-axis intercept of dV/d (lnJ)J plot and y-axis intercept of H(J)J plot, respectively. The series resistance was analyzed from the slopes of dV/d (lnJ)J and H(J)J plots. The values of ideality factor and barrier height obtained from this method are in agreement with those obtained from the thermionic emission theory. The obtained series resistances from dV/d (lnJ)J and H(J)J plots, which were approximately equal to each others, were increased as the temperature decreased. This result should be owing to the increased ideality factor and remarkably reduced carrier concentrations at low temperatures.
A Multi-Channel, 16-Bit, 250[kHz], Simultaneous Sampling ADC
Authors: Gao Wei Qi , Wan Hui , Zhang Jin , Yang Pin , Zhang Yan Lin , Tao Yi
Published: November 2013

A 16-bit multi-channel simultaneous sampling ADC of wide analog input was designed. This ADC had a maximum conversion rate of 250[kSPS]. The ADC was implemented in 0.6[um] 2P3M standard CMOS process+high voltage CMOS process. For ±10 [V]/10[kHz] sine analog input and 250[kSPS] sampling rate, the testing result of the ADC at room temperature is that INL is 1.7[LSB], SINAD is 85.3[dB], EFS-is 0.055[%FS], EFS+ is 0.039[%FS].
Multiband Camera System Using Color and Near Infrared Images
Authors: Kang You Sun , Shin Duk
Published: November 2013

Various applications using a camera system have been developed and deployed commercially to improve our daily life. The performance of camera system is mainly dependent on image quality and illumination conditions. Multiband camera has been developed to provide a wealth of information for image acquisition. In this paper, we developed two applications about image segmentation and face detection using a multiband camera, which is available in four bands consisting of a near infrared and three color bands. We proposed a multiband camera system to utilize two different images i.e. color image extracted from Bayer filter and near infrared images. The experimental results showed the effectiveness of the proposed system.
Improved RX Algorithm with Global Statistics
Authors: Wang Liang Liang , Li Zhi Yong , Sun Ji Xiang
Published: November 2013

Anomaly detection of hyperspectral is a hot issue in the remote sensing field. Anomaly detection algorithms currently proposed can be classified into two class, global algorithm and local algorithm. Global algorithm may lead to miss alarm since the discrimination is not accurate enough. On the contrary, local algorithm may bring about false alarm because of lack of global statistics. An improved RX algorithm integrating local and global statistics is proposed. Firstly K-means algorithm is carried out to cluster the whole image into K class which is determined with a virtual dimension estimation method. Then the improved RX is proposed by integrating the global cluster information and the local statistics. Experiment results show that the improved algorithm can obtain a better detection performance than RX algorithm.
An Algorithm for Large-Scale Terrain Generation Based on Quadtree
Authors: Fan Nai Mei , Zhang Zhi Feng
Published: November 2013

The paper puts forward an algorithm for multi-resolution terrain model generation based on quadtree. This algorithm puts elements as view-dependent and terrain relief into the evaluation standards for level of detail and raises appropriate methods to remove cracks in the course of terrain generation according to the law of node partition and rendering. In drawing terrain, optimized display technologies as frustum culling, backface culling, triangle fan and static data storage. Test results show, this algorithm can realize the real-time visualization of large-scale terrain.
Diagnosis Information Sharing of Weapon Equipment Based on SOA
Authors: Jiang Hui Xia , Wei Bao Hua , Wang Cheng
Published: November 2013

After analyzing the problem of the sharing and reuse of diagnosis knowledge in the diagnostic domain under open-architecture ATS environment, the method of software portability and extensibility of ATS information model is put forward in this paper. A genetic ATS open software system architecture of diagnosis information sharing of weapon equipment based on SOA is established, in which information sharing service and test function service are defined using service-oriented idea. It provides a method for high efficient equipment support.
Analysis of PCB via for Signal Integrity Using ANOVA
Authors: Zhou Shi Lei , Guan Ya Lin , Tang Xin Kun
Published: November 2013

This paper based on ANOVA (ANalysis Of VAriance) presents an investigation in the design of signal via in multilayered printed circuit boards (PCB) technology from a signal integrity point of view. Using the concept of the orthogonal array (OA), different vias physical aspect ratios have been set in the analysis. The impacts of these parameters are investigated with the help for a full-wave electromagnetic simulation soft HFSS. This study demonstrates the factors which is the most influence on the signal integrity.
2D-Laser Scan Registration Using Multi-Scale NDT with Polar Scan Clustering
Authors: Saranrittichai Piyapat , Niparnan Nattee , Sudsang Attawith
Published: November 2013

Scan registration plays an important role in robotics. The problem is to figure out the optimal transformation between two frames of data points, reference points and scene points. One approach to perform this task is using Normal Distribution Transform (NDT). The concept of NDT is to convert reference point cloud into Gaussian mixture distribution and then match scene points with this distribution. Nevertheless, this approach is likely to suffer from local optimum problem especially when the initial transformation error is large. Therefore, in recent researches, multi-scale registration technique is applied. In this work, multi-scale registration can be achieved by using polar scan clustering with different degree of separations. In registration problem, polar scan clustering has advantage over other clustering approaches because it is aware of the fact that the structure of data obtained from laser range finder is sorted by measured angle. To evaluate the performance of our approach, the experiment is conducted to compare transformation error resulted from our approach and a recent approach. As a result, the result from the proposed approach is better than the recent one significantly.
Experimental Validation of Nominal Model Characteristics for Pneumatic Muscle Actuator
Authors: Hošovský Alexander , Židek Kamil
Published: November 2013

Pneumatic artificial muscles belong to a category of nonconventional pneumatic actuators that are distinctive for their high power/weight ratio, simple construction and low price and maintenance costs. As such, pneumatic artificial muscles represent an alternative type of pneumatic actuator that could replace the traditional ones in certain applications. Due to their specific construction, PAM-based systems have nonlinear characteristics which make it more difficult to design a control system with good performance. In the paper, a gray-box model (basically analytical but with certain experimental parts) of the one degree-of-freedom PAM-based actuator is derived. This model interconnects the description of pneumatic and mechanical part of the system through a set of several nonlinear differential equations and its main purpose is the design of intelligent control system in simulation environment. The model is validated in both open-loop and closed-loop mode using the measurements on real plant and the results confirm that model performance is in good agreement with the performance of real actuator.
Study of the Surface Material AISI 304 Usable for Actuator after the Process of Turning
Authors: Panda Anton , Duplák Ján , Vorobeľ Tomáš , Jurko Jozef , Fabian Stanislav
Published: November 2013

Innovation of the technological processes is a very important part of continuous improvement of each manufacturing company. Every manufacturing company is trying to optimize the production processes to achieve the improvement of basic indicators, which include price, quality and speed of the production process. One of the means to achieve these indicators is to optimize the cutting parameters, which ensure the desired quality of the surface in a shorter manufacturing time. Innovation of the technological parameters of the manufacturing company means to repair, improve, and transform these parameters, which are used and show loss limitations. Application of updated parameters for manufacturing company may refer to significant reduction of engineering times, improving the material flow and the other factors, but it is mainly costs saving. This article is specialized on the study of the surface quality of the material AISI 304 by turning technology with selected cutting tool of sintered carbide. This material is usable for actuator (actuators and reduction gears) too.
Material Damping of Fibrous Composites for Devices Driven by Artificial Muscles
Authors: Murčinková Zuzana
Published: November 2013

The paper dealt with material damping of fibrous composites for devices driven by artificial muscles as non-conventional driver. The composite material is intended mainly for rehabilitation devices, as well as for human artificial limbs, exoskeletons etc. The manipulator (rehabilitation) devices have potential to find usage in different periods of human life. Material properties of composites are suitable for applications with dynamic load, especially for their weight and material damping. On the base of experimental measuring, the material damping of several materials is analyzed.
An Investigation for Recovering Zinc and Iron from Gossan
Authors: Yang Jin Lin , Zhang Hong Mei , Feng Jin Peng , Ma Shao Jian , Su Xiu Juan
Published: November 2013

In recent years, recovering zinc from low grade oxidized zinc ore has been a matter of discussion. In this paper, the investigation for recovering zinc and iron from gossan ores was carried out. In generally, the conventional physical separation methods, such as flotation, gravity separation and magnetic separation, were used to treat the low grade ore, and flotation is the most commonly used method for beneficiation and pretreatment of oxidized zinc minerals. However, gravity separation and magnetic separation are used to deal with the gossan ores because of the special zinc oxide ore bearing iron 40.2% in this study. The effects of grinding fineness and magnetic intensity were investigated, respectively. The results show that the grade of zinc and iron increase slightly, and the best result is that the grade of zinc and iron are 13.35% and 40.25%, the recovery of zinc and iron are 53.45% and 52.19%.
Study on Flotation Mechanism of Separation of Potassium Feldspar from Quartz with Anion and Cation Mixed Collector
Authors: Liu Jie , Chen Wen Yue , Han Yue Xin , Yuan Hong Qian
Published: November 2013

Potassium feldspar and quartz are all silicate minerals with frame structure,and have the similar crystal structure and physicochemical properties. Therefore, flotation has become the main method to separate potassium feldspar from quartz. The separation of potassium feldspar from quartz with anion and cation mixed collector was studied in the paper. The sodium oleate and sodium dodecyl benzene sulfonate were respectively used as collector agents in potassium feldspar and quartz single mineral flotation tests. The analysis of the variation of the surface properties of potash feldspar and quartz after using the collectors was conducted with infrared spectra and electrokinetic potential, followed by the mechanism of separation of potassium feldspar from quartz with anion and cation mixed collector.
Sulfuric Acid Leaching on Low Grade Oxide Ore
Authors: Yang Jin Lin , Zhang Hong Mei , Wang Gui Fang , Ma Shao Jian , Zhang Min
Published: November 2013

In this paper, sulfuric acid leaching was carried out to assess the effect of several parameters on metal extraction in a low grade complex gossan ore in which the grade of zinc and iron is 13% and 40.2%, respectively. Parameters, such as sulfuric acid concentration, liquid to solid ratio and leaching temperature, were studied. The results show that the zinc leaching rate is almost 80%, while the iron leaching rate is about 45% used strong acid with 200g/L. It can be seen from the results that sulfuric acid leaching could not effectively recover zinc from gossan ores studied in this paper because of iron dissolving greatly.
The Status of Fine Grained Minerals Flotation and Facility
Authors: Yu Lian Tao , Dai Shu Juan , Zhao Tong Lin , Han Jia Hong , Zhang Meng
Published: November 2013

Fine disseminated ore extent of growing with the continuous mining. Fine grained minerals have become an important part of the mineral separation and it gets a lot of people's attention. This paper expounds the status of fine particle flotation process and fine particle separation facility.
The Study on Properties Change of Bauxite Crushed by High Pressure Grinding Roller
Authors: Yan Zan , Yuan Zhi Tao , Peng Meng Su , Chen Jun Tao
Published: November 2013

High Pressure Grinding Roll (HPGR) is a modern and energy-efficient surface area and pore volume of HPGR and jaw crusher comminuted products. The results indicate that HPGR products have lower work index, higher specific surface area and pore volume than its counterpart. Therefore HPGR is capable of lowering the energy consumption on plants, as well as improving the utilization of bauxite. In total, the HPGR is a better crushing solution than jaw crusher, at least in the perspective of energy efficiency.
Development of Lignite Wax Production Technology
Authors: Ma Zhi Jun , Li Yuan , Huo Jin , Li Bing Chuan
Published: November 2013

Lignite wax, an important chemical material, has good physical and chemical properties and is widely used in precision casting, wire and cable and other fields. This article briefly introduces the international and domestic markets of the lignite wax,and proposes the development direction of lignite wax production. Provide the basis for the production process through summary basic research data, and look for efficient solvent to improve yield and quality, and develop integrated production to realize comprehensive utilization of resources.
Effects of Microcrystalline Grinding on Physical Characteristics and Element Release in K-Feldspar Rocks
Authors: Lv Le Fu , Gai Guo Sheng , Liu Chun Sheng , Yang Yu Fen , He Zhen Quan , Li Wan Cai , Zhang Xian Mei
Published: November 2013

The K-feldspar rocks, mechanically activated by a microcrystalline mill with an organic activator, were used to study their physical properties and kinetics of element release. The results showed that the microcrystalline grinding reduced particle size, significantly increased specific surface area, obviously improved the morphologies, and broke the lattice structure and increased abundance of amorphous and disordered constituents in K-feldspar rocks within 45 minutes of grinding. Further grinding beyond 45 minutes resulted in an undesirable effect. The microcrystalline grinding also improved release amount of K, Na, Si, Al, Fe and P, and increased the value of pH and EC in extracting solution. Among the grinding treatments, the best physicochemical properties were obtained at 45 minutes and the energy consumption was lower. In comparison to the ordinary K-feldspar rocks, the physical characteristics of the activated K-feldspar rocks were changed significantly. These changes enhanced the nutrient release from the K-feldspar rocks. Thus, microcrystalline grinding technology was important to exploit and utilize the K-feldspar rocks.
Preparation of Perovskite Type SrNiO3 Photocatalyst Material by Microwave Heating Method
Authors: Wang Xin
Published: November 2013

A new microwave heating method for reparation of SrNiO3 photocatalyst material was described. The optimum preparation conditions are that the microwave power is 560W, the microwave heating time is 30min, the calcination temperature is 700°C and the calcination time is 5h.The compound was measured by X-ray diffraction. In visible light and under the conditions of simulated fuel waste water, the photocatalytic properties of the catalyst material have been studied. The results showed the photocatalytic material prepared by that microwave heating have a high photocatalytic performance of degradation, and the degeneration rate of the dye may reach 98%.
Preparation of SiO2/Cenoshpere Composites and Super-Hydrophobic Surface
Authors: Yang Bing , Yang Yu Fen , Gai Guo Sheng
Published: November 2013

Nano SiO2/ cenoshpere composites were prepared to obtain the core-shell structure by chemical precipitation and heterogeneous nucleation. This kind of composites can be further used to fabricate super-hydrophobic surface. In this study, industrial fly ash cenoshpere and water glass solution were used as raw materials. The aim was to coat a layer of Nano SiO2 on the surface of cenosphere. By tests of SEM, XRD, FTIR, XPS, the mechanism of coating process was discussed. Treat the composites with KH-570, and then use this kind of particles to prepare super-hydrophobic surface.
Research on Tourmaline of Huapi Ditch, Yichun City, Helongjiang Province
Authors: Li Zhi Feng , Gao Ye , Dai Shu Juan
Published: November 2013

Tourmaline is the floorboard of the mineral tourmaline family with piezoelectricity and thermoelectricity[. In 1989, Japanese scholars Kubo found tourmaline spontaneous permanent electrode[,which led to a new boom of tourmaline development and research. Tourmaline, as the prospect of new mineral materials, has the attention of the scientists from multiple disciplines and has obtained great development in environmental protection, electronics, medicine, chemical industry, light industry, architecture and other fields. The domestic research on tourmaline resources development and utilization is limited. The mineral dressing method are mainly two kinds: magnetic separation and flotation separation.
Synthesis and Raman Behaviors of ZnO Nanorods by a Surfactant-Free and Low-Temperature Process
Authors: Ma Zheng Xian , Liu Qiao Ling , Wang Lan Qin , Pang Lu Feng
Published: November 2013

ZnO nanorods were successfully synthesized using ZnCl2 and NaOH as the starting materials without surfactants, template supporting and structure-directing solvent at low temperatures (20 °C 90 °C). X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) were used to analyze the crystal structure and surface morphology. Analysis of XRD patterns showed that ZnO clusters are single hexagonal phases of wurtzite structure with no other impurities. Also, TEM images revealed that the size of a single ZnO nanorod was between 32 and 60 nm in diameter and between 470 and 740 nm in length. Furthermore, the ZnO nanorods exhibited significant Raman spectrum optical properties suggesting that they have potential for opto-electronic application.
The Research on the Experiment Conditions for the Preparation of New Geopolymer by the Utilization of Tailings
Authors: Cao Yang , Yin Wan Zhong , Dong Shuai
Published: November 2013

Admix different tailings for preparing new inorganic mineral polymer. To explore the preparation conditions by testing the different performances of mortar specimens. The results show that, the strength performance is the best when the tailing dosage is 20%, the modulus of water glass is 1.2, water glass content (Na2O) is 4.5% and the ratio of liquid to solid is 0.6.
Adsorption Characteristics of Directly Modified Bentonite
Authors: Wang Gui Ping , Wang Gui Yan , Cao Chun Yan
Published: November 2013

Directly modified bentonite was obtained by directly adding modifier cetyl trimethyl ammonium bromide (CTMAB) to sodium bentonite.The modified bentonites adsorption performance to methyl orange and methylene blue was studied, and it was compared with modified bentonite prepared by classical method. The results show that directly modified bentonite has a greater and faster absorption for both methyl orange and methylene blue; the relationship between adsorption quantity and equilibrium concentration conforms to the Langmuir isotherm equation; absorption kinetics is in accordance with the secondary dynamics equation.
Determination of Trace Heavy Metal Ions in Water by FAAS after Preconcentration with ASTO
Authors: Song En Jun
Published: November 2013

A new method of preconcentration with nanometer-strontium titanate immobilized on aluminum oxide (ASTO) combined with flame atomic absorption spectrometry (FAAS) was proposed for the determination of trace heavy metal ions, included Cu2+, Ni2+ and Ag+, in environmental water. The optimum experimental parameters for preconcentration of the heavy metals studied, such as pH, shaking time, eluent and coexisting ions, have been investigated. The results showed that Cu2+, Ni2+ and Ag+, could be quantitatively retained by the ASTO in the pH range of 5-8, and then eluted completely with 2 mol·L-1 HNO3. The detection limits of this method for Cu2+, Ni2+ and Ag+ were 0.031μg·L-1, 0.15μg·L-1and0.041μg·L-1 with an enrichment factor of 50, respectively. The method has been applied to the simultaneous determination of trace amounts of Cu2+, Ni2+ and Ag+ in environmental water, the recoveries were all in 95%-105%.
The Sedimentation Experiment of the Fine White Slime Water
Authors: Zhang Hong Bo , Shi Qi Lei
Published: November 2013

There are a lot of white ore in Jixi Qingshan coal mine. Argillization of this ore is very terrible. This ore quickly turns to fine white slime in water and forms the stable suspending liquid. It leads that slime water form sediment is very terrible. This paper analyzed and researched the characters of the fine white slime water. The experiment results showed that the combined applied effect of MgCl2 and NPAM can enhance form sediment effect.
The sample is the coal sample used in Jixi Qing Shan coal mine, which contains lots of white ore and is dipped in water for observation. This ore quickly turns to fine white slime in water, superfine, forming the stable suspending liquid. This suspending liquid become sedimentation in the natural placement for several days, which seriously effect the normal operation of the system of the manufacturing part of coal cleaning. This research on the sedimentation experiment of the fine white slime water will be introduced in this thesis.
Experimental Studies on a Mineral Containing Titanium in Baoding Area
Authors: Liu Guo Zhen , Dai Shu Juan , Bai Li Mei , Ma Yu Xin , Zhang Yong
Published: November 2013

The main elements can be recovered for mineral processing in a mineral containing titanium of Baoding area were Ti, Fe and V, and the elements in the main gangue minerals were Si and Al. Gravity concentration, gravity concentration-high intensity magnetic separation and gravity concentration-flotation tests were performed on the ore sample respectively. The results showed that, in the test of shaking table, when the grinding fineness was -0.074mm 93%, the productivity of concentrate can reach 32.24%; when grinding fineness was -0.074mm 93%, after gravity concentration-magnetic separation, 30.25% of concentrate productivity can be attained; when the grinding fineness was -0.074mm 85%, after gravity concentration-flotation, the productivity of concentrate was 3.31%. Maybe it's the condition of the tests wasn't controlled well, especially adjusting pH value in the flotation stage, it's hard to control, so the results were not very good.
Experimental Study on Improving Grade of Talc Ore by Floatation
Authors: Hu Zhi Gang
Published: November 2013

The experimental sample consists of talc, magnesite and a little quartz, the grade of talc is 80%. By the floatation flowsheet of rougher and two times cleaner, and middling after regrinding return to rougher, the high grade talc concentrate can be obtained. The concentrate contains talc 95.67% (SiO2 61.68%). Talc recovery rate is 89.43%. By this way, the output of high class talc product is increased and talc resources are exploited very well.
Experimental Research on a Cyanidation of Gold Ore Containing Arsenic
Authors: Zhang Meng , Dai Shu Juan , Yu Lian Tao , Han Jia Hong , Liu Guo Zhen
Published: November 2013

The main metal minerals are magnetic pyrite arsenopyrite pyrites, galenite sphalerite,etc.The main gangue minerals are quarts,sericite,chlorite,carbonate,etc.Nature gold,electrum,bullion and nature silver are main gold silver minerals. The useful element is gold and silver and the impurity is arsenic. The experimental results of cyanide leaching crude and flotation concentrate show that the index of leaching rate of gold and silver being 93.90% and 81.38% are got on the condition of grinding fineness being 95.3%-0.074mm，pulp thickness being 33%，dosage if CaO being 2.5kg/t（pH≈11），dosage of NaCN being 3.0kg/t,leaching time being 24h by leaching crude of gold and silver grade being 0.82g/t、4.78g/t.
Kaolin's Dispersion Degree Change with Aids in Vibrating Mill
Authors: Xu Zheng , Yue Tao , Shen Zhi Gang
Published: November 2013

Dispersion is the major factor to influence the behavior of calcined kaolin in the vibrating mill. The dispersion degree of powder affects not only the fluidity of the powder, but also the efficiency of the grinding. Organic and inorganic aids are used to promote the dispersion degree of powder in the vibrating mill. All of the aids can improve the dispersion degree. When the aids dosage is 5 for organic aids and 1 for inorganic aids respectively, the dispersion degree of the powder in the vibrating mill are the best. The aids can also improve the final powder size and their distribution.
Research on Separating Low-Grade K-Feldspar from Quartz without Hydrofluoric Acid
Authors: Lv Zhen Fu , Li Hong Chao , Zhang Hong Xin , Tian Min
Published: November 2013

Flotation technology without fluorite was studied to separate low-grade K-feldspar with quartz. It is shown in the results that qualified K-feldspar concentrate can be gained by grinding, desliming, flotation and high intensity Magnetic Separation process. Feldspar concentrate obtained in closed-circuit had a content of K2O and Na2O 12.12%, quartz concentrate with a yield of 19.94% containing 97.12% SiO2 was obtained in the same time.