scholarly journals INSTRUMENTED BALL DESIGN AND DEVELOPMENT

2011 ◽  
Author(s):  
Suda Martins ◽  
Wei Li ◽  
Peter Radziszewski
Keyword(s):  
Motion Simulation ◽  
Charge Motion ◽  
Ball Mills ◽  
Processing Industry ◽  
Tumbling Mills ◽  
Simulation Results ◽  
The Relationship ◽  
Instrument Package ◽  
Tumbling Mill ◽  
Mill Charge

In the mineral processing industry, tumbling mills are used in the size reduction or comminution of ore to a target size distribution. As the tumbling mill environment is quite violent it is difficult to monitor mill charge motion let alone single ball or particle motion. An effort was initiated to investigate the development of an instrumented ball that includes data collection capabilities. A variety of sensors, including accelerometers and gyros, form the instrument package. The data collected by the instruments allow the calculation of a number of dynamic and kinematic quantities as a function of time. Using instrumented ball data, the error model of the instrument can be found. Finally, the importance of the data with respect to ball mills is discussed along with the relationship between the instrumented ball data and charge motion simulation results is discussed.

scholarly journals EXPLORING THE DESIGN AND DEVELOPMENT OF AN "ON-THE-SHELL" TUMBLING MILL ACOUSTING MONITORING SYSTEM

2011 ◽  
Author(s):  
Suda Martins ◽  
Joachim Zepeda ◽  
Benoit Picard ◽  
Peter Radziszewski
Keyword(s):  
Data Acquisition System ◽  
Trial Data ◽  
Acoustic System ◽  
Charge Motion ◽  
Acoustic Data ◽  
Tumbling Mills ◽  
Toe Angle ◽  
Tumbling Mill ◽  
Mill Charge

In the mineral processing industry, tumbling mills are used in the size reduction or comminution of ore to a target size distribution. As the tumbling mill environment is quite violent it is difficult to monitor mill charge motion. One way is to develop an “on-the-shell” acoustic system. This system will be used in the determination of the charge toe angle of an operating tumbling mill. The instrument, microphone system with the appropriate data acquisition system, collects the acoustic data. An analysis of the signal determines the location of the toe. The results of this development along with some trial data are presented.

scholarly journals LINE WEAR SENSOR DESIGN

2011 ◽  
Author(s):  
Peter Radziszewski ◽  
Suda Martins ◽  
Wei Li ◽  
Benoit Picard ◽  
Yu Yun Quan
Keyword(s):  
Thin Film ◽  
Failure Modes ◽  
Operating Environment ◽  
Film Sensor ◽  
Processing Industry ◽  
Thin Film Sensor ◽  
Line Wear ◽  
Tumbling Mills ◽  
Industrial Machine ◽  
Tumbling Mill

In the mineral processing industry, tumbling mills are used in the size reduction or comminution of ore to a target size distribution. The tumbling mill environment is characterised by frequent and violent interactions all of which are associated with wear either of the steel media or the mill liners. Liner profiles are monitor periodically using manual measurements. In this paper, the design and development of a liner wear sensor is investigated. The thin-film sensor operates within a mill, measuring liner wear while protecting the shell. Also, it is designed to avoid failure modes due to the operating environment. A prototype sensor was built and tested in dry and wet laboratory conditions. The results of the grind test show the feasibility of using the sensor in an industrial machine.

TCAD Study of the Raised SiGe Source/Drain in 40nm PMOS

2015 ◽  
Vol 645-646 ◽  
pp. 70-74 ◽  
Author(s):  
Min Zhong ◽  
Yu Hang Zhao ◽  
Shou Mian Chen ◽  
Ming Li ◽  
Shao Hai Zeng ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Critical Role ◽  
Sige Layer ◽  
Strain Engineering ◽  
Effect Transistor ◽  
Simulation Results ◽  
Aided Design ◽  
The Relationship ◽  
Growth Experiments ◽  
Good Agreement

An embedded SiGe layer was applied in the source/drain areas (S/D) of a field-effect transistor to boost the performance in the p channels. Raised SiGe S/D plays a critical role in strain engineering. In this study, the relationship between the SiGe overfilling and the enhancement of channel stress was investigated. Systematic technology computer aided design (TCAD) simulations of the SiGe overfill height in a 40 nm PMOS were performed. The simulation results indicate that a moderate SiGe overfilling induces the highest stress in the channel. Corresponding epitaxial growth experiments were done and the obtained experimental data was in good agreement with the simulation results. The effect of the SiGe overfilling is briefly discussed. The results and conclusions presented within this paper might serve as useful references for the optimization of the embedded SiGe stressor for 40 nm logic technology node and beyond.

scholarly journals DOA Estimation for Coprime Linear Array Based on MI-ESPRIT and Lookup Table

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 3043 ◽  
Author(s):  
Weike Zhang ◽  
Xi Chen ◽  
Kaibo Cui ◽  
Tao Xie ◽  
Naichang Yuan
Keyword(s):  
Linear Array ◽  
Estimation Algorithm ◽  
Doa Estimation ◽  
Spatial Spectrum ◽  
Angle Measurement ◽  
Lookup Table ◽  
Signal Parameters ◽  
Estimation Precision ◽  
Simulation Results ◽  
The Relationship

In order to improve the angle measurement performance of a coprime linear array, this paper proposes a novel direction-of-arrival (DOA) estimation algorithm for a coprime linear array based on the multiple invariance estimation of signal parameters via rotational invariance techniques (MI-ESPRIT) and a lookup table method. The proposed algorithm does not require a spatial spectrum search and uses a lookup table to solve ambiguity, which reduces the computational complexity. To fully use the subarray elements, the DOA estimation precision is higher compared with existing algorithms. Moreover, the algorithm avoids the matching error when multiple signals exist by using the relationship between the signal subspace of two subarrays. Simulation results verify the effectiveness of the proposed algorithm.

scholarly journals Research on the Performance of Electric Vehicles in Peak Load Shifting

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Qingshan Xu ◽  
Yujun Liu ◽  
Maosheng Ding ◽  
Pingliang Zeng ◽  
Wei Pan
Keyword(s):  
Potential Energy ◽  
Electric Vehicles ◽  
Peak Load ◽  
Load Shifting ◽  
Vehicle To Grid ◽  
Capacity Level ◽  
Simulation Results ◽  
The Relationship

Electric vehicles (EVs) are developing remarkably fast these years which makes the technology of vehicle-to-grid (V2G) easier to implement. Peak load shifting (PLS) is an important part of V2G service. A model of EVs’ capacity in V2G service is proposed for the research on PLS in this paper. The capacity is valued in accordance with three types of situations. Based on the model, three different scenarios are suggested in order to evaluate the capacity with MATLAB. The evaluation results indicate that EVs can provide potential energy to participate in PLS. Then, the principle of PLS with EVs is researched through the analysis of the relationship between their power and capacity. The performance of EVs in PLS is also simulated. The comparison of two simulation results shows that EVs can fulfill the request of PLS without intensely lowering their capacity level.

scholarly journals Barycenter Theorem in Phase Characteristics of Symmetric and Asymmetric Windows

Symmetry ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 329
Author(s):  
Jiufei Luo ◽  
Haitao Xu ◽  
Kai Zheng ◽  
Xinyi Li ◽  
Song Feng
Keyword(s):  
Frequency Estimation ◽  
Random Noise ◽  
Estimation Algorithm ◽  
Frequency Component ◽  
Phase Response ◽  
Numeric Simulation ◽  
Simulation Results ◽  
The Time Domain ◽  
Short Time ◽  
The Relationship

Asymmetric windows are of increasing interest to researchers because of the nonlinear and adjustable phase response, as well as alterable time delay. Short-time phase distortion can provide an essential improvement in speech coding, and also has better performance in speech recognition. The merits of asymmetric windows in the aspect of spectral behaviors have an important function in frequency component detection and parameter estimation. In this paper, the phase response of windows were further studied, and the phase characteristics of symmetric and asymmetric windows are described. The relationship between the barycenter of windows in the time domain, and the phase characteristic at the center of the main lobe in the frequency domain, was established. In light of the relationship, an improved version of the asymmetric window- based frequency estimation algorithm was proposed. The improved algorithm has advantages of straightforward implementation and computational efficiency. The numeric simulation results also indicate that the improved approach is more robust than the traditional method against additive random noise.

scholarly journals A Theoretical Framework on Market Orientation-firm Performance Linkage in Textile Processing Industry: Mediating Effect of Entrepreneurial Orientation

Webology ◽  
2021 ◽  
Vol 18 (Special Issue 03) ◽  
pp. 261-273
Author(s):  
Dibyendu Pal ◽  
Kumar Shalender
Keyword(s):  
Firm Performance ◽  
Organizational Performance ◽  
Conceptual Model ◽  
Market Orientation ◽  
Entrepreneurial Orientation ◽  
Mediating Effect ◽  
Textile Processing ◽  
Processing Industry ◽  
Relationship Of ◽  
The Relationship

The objective of this theoretical paper is to explore the relationship of market orientation (MO) and organizational performance in the context of Indian textile processing industry. The study also aims to construct a conceptual model which can hypothesize the relationship between market orientation, firm performance, and entrepreneurial orientation (EO). The conceptual model is drawn with the help of extant literature review of studies conducted by various authors in the area of market orientation and entrepreneurial orientation. The study presents a model depicting the inter-relationship among MO, EO and firm performance. The proposed model also propounds that the relationship between market orientation and firm performance is mediated by entrepreneurial orientation. This work will be helpful for different stakeholders of textile processing industry to understand the importance of MO and EO and their impact on the performance of the organization. Also, the proposed conceptual model showing inter-relationship among MO, EO and firm performance is an addition to the existing pool of knowledge.

scholarly journals BER Performance Analysis of Non-Coherent Q-Ary Pulse Position Modulation Receivers on AWGN Channel

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6102
Author(s):  
Xianhua Shi ◽  
Yimao Sun ◽  
Jie Tian ◽  
Maolin Chen ◽  
Youjiang Liu ◽  
...  
Keyword(s):  
Gaussian Noise ◽  
Additive White Gaussian Noise ◽  
Theoretical Formula ◽  
Pulse Position Modulation ◽  
Error Performance ◽  
Optimal Receiver ◽  
Awgn Channel ◽  
Simulation Results ◽  
The Relationship ◽  
Better Than

This paper introduces the structure of a Q-ary pulse position modulation (PPM) signal and presents a noncoherent suboptimal receiver and a noncoherent optimal receiver. Aiming at addressing the lack of an accurate theoretical formula of the bit error rate (BER) of a Q-ary PPM receiver in the additive white Gaussian noise (AWGN) channel in the existing literature, the theoretical formulas of the BER of a noncoherent suboptimal receiver and noncoherent optimal receiver are derived, respectively. The simulation results verify the correctness of the theoretical formulas. The theoretical formulas can be applied to a Q-ary PPM system including binary PPM. In addition, the analysis shows that the larger the Q, the better the error performance of the receiver and that the error performance of the optimal receiver is about 2 dB better than that of the suboptimal receiver. The relationship between the threshold coefficient of the suboptimal receiver and the error performance is also given.

scholarly journals Development of a method to measure charges in tumbling mills

2014 ◽  
Vol 67 (3) ◽  
pp. 311-316
Author(s):  
Eduardo Nozawa Caetano de Araujo ◽  
Homero Delboni Jr.
Keyword(s):  
Low Cost ◽  
Total Charge ◽  
Main Aspect ◽  
Product Size ◽  
Confined Spaces ◽  
Power Draw ◽  
Grinding Media ◽  
Tumbling Mills ◽  
The Common ◽  
Tumbling Mill

Tumbling mills are often taken as the object of optimization studies because they are a type of equipment that consume large amounts of energy. Among the current available resources to conduct such studies, mathematic modelling presents great efficiency due to its low cost, speed and reliability. The total charge and grinding media charge are very important variables to conduct modelling exercises that aim at power draw and product size distribution forecasting. However, the common measurement methods require people entering the equipment, which carries a number of adversities related to confined spaces. In this regard, this paper presents the development of a method and the prototype of a device able to measure tumbling mill charges, quickly, precisely, with low cost and, above all, ensuring safety. The result of this work is a method that allows equivalent or superior precision in comparison to the existing methods, whose main aspect is to eliminate the requirement of people entering dangerous environments, such as tumbling mills.

Optimal Patent Design

2013 ◽  
pp. 280-302
Author(s):  
Anthony Brabazon
Keyword(s):  
Product Space ◽  
Policy Instruments ◽  
Agent Based Modeling ◽  
Technological Advance ◽  
Patent Policy ◽  
Agent Based ◽  
Simulation Results ◽  
The Relationship ◽  
Patent Design ◽  
Patent Breadth

Patents provide a patentee with a degree of monopoly power over a region of product space. The “breadth” and “duration” of patents are policy choices. Increasing patent breadth and duration will ceteris paribus increase the rent, which an individual inventor could earn from a commercially successful invention. However, the precise nature of the relationship between patent policy and the rate of societal technical advance, which is stimulated by a given patent design, is not well understood. In this chapter, the authors novelly investigate this issue using an agent-based modeling approach. The simulation results obtained raise questions about the real utility of patent policy in promoting technological advance and suggest that other policy instruments are actually more important.

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