The Influence and Simulation of Crank Shaft Length over Upper Knife Holder Trace of Rolling-Cut Bilateral Shear

2012 ◽  
Vol 572 ◽  
pp. 317-321
Author(s):  
Xian Jia ◽  
Zhi Bing Chu ◽  
Qing Xue Huang ◽  
Li Feng Ma
Keyword(s):  
Auxiliary Equipment ◽  
Shaft Length ◽  
Theoretical Support ◽  
Pure Rolling ◽  
Working Principle ◽  
Movement Trace ◽  
Shearing Mechanism ◽  
Relationship Of ◽  
The Relationship ◽  
Different Thickness

Rolling-cut bilateral shear is a sort of auxiliary equipment with arc upper blade performing pure rolling over flat lower one. The working principle are characterized as up-and-down movement of upper blade by crank shaft, after the rotation caused by the phase difference between two shafts, which makes upper blade rotate to adapt to steel shearing with different thickness. Through analysis the processing of rolling-cut bilateral shear and make the shearing mechanism simplify 8-linkage, and then the kinetics formula of shearing mechanism was established. The relationship of crank shaft length of rolling-cut bilateral shear in shearing process and movement trace of upper blade (shearing overlapping) was obtained as well as the change rule of length of linkage over upper blade, which provides the theoretical support for the design of rolling-cut bilateral shear.

scholarly journals Techniques for postmortem tenderisation in meat processing: effectiveness, application and possible mechanisms

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Haibo Shi ◽  
Fereidoon Shahidi ◽  
Jiankang Wang ◽  
Yan Huang ◽  
Ye Zou ◽  
...  
Keyword(s):  
Meat Industry ◽  
Meat Processing ◽  
Protein Biomarkers ◽  
Theoretical Support ◽  
Exogenous Enzymes ◽  
Home Cooking ◽  
Relationship Of ◽  
The Relationship ◽  
Combined Interventions ◽  
Calpain System

Abstract Developing efficient and promising tenderising techniques for postmortem meat is a heavily researched topic among meat scientists as consumers are willing to pay more for guaranteed tender meat. However, emerging tenderising techniques are not broadly used in the meat industry and, to some degree, are controversial due to lack of theoretical support. Thus, understanding the mechanisms involved in postmortem tenderisation is essential. This article first provides an overview of the relationship of ageing tenderisation and calpain system, as well as proteomics applied to identify protein biomarkers characterizing tenderness. In general, the ageing tenderisation is mediated by multiple biochemical activities, and it can exhibit better palatability and commercial benefit by combining other interventions. The calpain system plays a key role in ageing tenderisation functions by rupturing myofibrils and regulating proteolysis, glycolysis, apoptosis and metabolic modification. Additionally, tenderising techniques from different aspects including exogenous enzymes, chemistry, physics and the combined methods are discussed in depth. Particularly, innovation of home cooking could be recommended to prepare relatively tender meat due to its convenience and ease of operation by consumers. Furthermore, the combined interventions provide better performance in controlled tenderness. Finally, future trends in developing new tenderising techniques, and applied consideration in the meat processing industry are proposed in order to improve meat quality with higher economical value. Graphical abstract

scholarly journals Analysis of the Azimuth Ambiguity and Imaging Area Restriction for Circular SAR Based on the Back-Projection Algorithm

Sensors ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 4920 ◽  
Author(s):  
Bang Du ◽  
Xiaolan Qiu ◽  
Lijia Huang ◽  
Songlin Lei ◽  
Bin Lei ◽  
...  
Keyword(s):  
Beam Width ◽  
Bp Algorithm ◽  
Projection Algorithm ◽  
Parameter Design ◽  
Observation Angle ◽  
Back Projection ◽  
Theoretical Support ◽  
Relationship Of ◽  
The Relationship ◽  
Small Observation

Circular synthetic aperture radar (CSAR) has a 360° observation capability on the central observation scenario. A typical way to process CSAR imaging is to cut data into small sub-apertures because most targets are only coherent at a very small observation angle. There are many sub-aperture imaging methods after development in recent years. The back-projection algorithm is widely used because it is simple and can be applied to an arbitrary trajectory. Because of the limitation of the Nyquist sampling frequency and influence of the antenna sidelobe, azimuth ambiguity is a phenomenon that may occur in the radar imaging process. The existing researches typically choose the back-projection (BP) imaging area according to the SAR platform flight path and the antenna beam width. The limitation of the CSAR imaging area and its azimuth ambiguity region are rarely analyzed theoretically. This paper focus on the sub-aperture imaging of CSAR, based on the BP algorithm, which derives the relationship of azimuth ambiguity with CSAR parameters such as the pause repeat frequency (PRF), slant range angle, velocity of radar platform, etc. This paper proposes an equation for the calculation of the azimuth ambiguity region and analyzes the limitations, which provides theoretical support for CSAR parameter design, imaging area selection, and azimuth ambiguity analysis.

Research on the Method of Circumferential Spring Dual Mass Flywheel Damper Matching with Diesel Engine

2009 ◽  
Vol 419-420 ◽  
pp. 65-68
Author(s):  
Zheng Feng Jiang ◽  
Lei Chen
Keyword(s):  
Diesel Engine ◽  
Torsional Vibration ◽  
Torsional Stiffness ◽  
Vibration Damper ◽  
Passenger Car ◽  
Inertia Coefficient ◽  
New Type ◽  
Working Principle ◽  
Relationship Of ◽  
The Relationship

As a new type of torsional vibration damper, a Dual Mass Flywheel (DMF) has different configuration and working principle from the traditional clutch. Focusing on the problem of matching DMF with a diesel engine, the relationship of circumferential spring dual mass flywheel (CS-DMF) and gearbox is analyzed based on a multi-freedom model, and then the methods of gearbox selection, rotary inertia coefficient ascertain and optimization of torsional stiffness are proposed in this paper. The methods have been applied to a CS-DMF matching with a passenger car with diesel engine. Modal simulation and torque fluctuating experiment show the CS-DMF has excellent damping performance.

Study on High Frequency Hydraulic Exciter Based on Rotary Valve Control

2012 ◽  
Vol 490-495 ◽  
pp. 1441-1445 ◽  
Author(s):  
Jian Zhuo Zhang ◽  
Li Zhe Guan ◽  
Kang Kang Li
Keyword(s):  
Mathematical Model ◽  
High Frequency ◽  
Rotary Valve ◽  
Exciting Frequency ◽  
Working Principle ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Valve Control

A kind of hydraulic exciter based on rotary valve control was studied in this paper, the composition of the exciter and its working principle were introduced, and the mathematical model of the system was established. The characters of the system were simulated using MATLAB. From the results of the simulation, we get the relationship of the amplitude of Vibration oil cylinder between the system’s pressure and the exciting frequency. The results can provide theoretical bases to design the hydraulic exciter.

Theories and Applications of Pulsed-Jet Drilling With Mechanical Specific Energy

SPE Journal ◽  
2016 ◽  
Vol 21 (01) ◽  
pp. 303-310 ◽  
Author(s):  
Wei Minghui ◽  
Li Gensheng ◽  
Shi Huaizhong ◽  
Shi Shuaishuai ◽  
Li Zhaokun ◽  
...  
Keyword(s):  
Specific Energy ◽  
Field Tests ◽  
Cleaning Efficiency ◽  
Pulsed Jet ◽  
Mechanical Specific Energy ◽  
Main Work ◽  
Theoretical Support ◽  
Relationship Of ◽  
The Relationship ◽  
Conventional Drilling

Summary Mechanical specific energy (MSE) is the amount of energy required to destroy a unit volume of rock. The main work of this study is to bring the hydraulic energy of a pulsed jet into an MSE model and further analyze the mechanism of improving the rate of penetration (ROP) for pulsed-jet drilling on the basis of the model. Laboratory experiments are used to obtain the relationship of bit hydraulic horsepower between pulsed jet and continuous jet, and then the MSE model of pulsed-jet drilling is established. According to the MSE theory, the major mechanisms of improving ROP in pulsed-jet drilling are changing the breaking strength of rock and improvement of downhole-cuttings-cleaning efficiency. Field tests and data presented in this study showed that this model could be used to evaluate drilling efficiency and identify abnormal conditions for pulsed-jet drilling. All tests were operated with similar parameters and on the same drilled formation. The field results illuminate that pulsed-jet drilling has higher drilling efficiency compared with conventional drilling. Moreover, the specific patterns for abnormal conditions can be detected in real time in the process of pulsed-jet drilling. This model is less ambiguous as well as robust. Therefore, it could provide theoretical support for the wide application of pulsed-jet drilling.

scholarly journals Proposing a theoretical framework to investigate the relationships between an organization and its environment

2007 ◽  
Vol 11 (1) ◽  
pp. 75-96 ◽  
Author(s):  
Ricardo Corrêa Gomes ◽  
Luciana de Oliveira Miranda Gomes
Keyword(s):  
Resource Dependence ◽  
Open Systems ◽  
Theoretical Models ◽  
Theoretical Framework ◽  
Extensive Literature ◽  
Theoretical Support ◽  
External Agents ◽  
And Performance ◽  
Relationship Of ◽  
The Relationship

This paper proposes a theoretical framework for investigating stakeholder theory in organizations. The organizations theory can be understood in three theoretical models: rationalist, natural and open systems. These models are presented to justify that organizations should be analyzed taking into account that social system aspects and the natural and open system models are employed. The applications of this paper rely upon the theoretical framework which is based on an extensive literature review comprising environment based theories. This paper would be of help to researchers examining the whole set of the relationship of organizations with their environment instead of only the relationships with external agents. Employing the theoretical basis presented in this analysis, the researcher will be able to identify both feasible theoretical sources for his/her studies and useful approaches for carrying on his/her investigations. The paper presents theories for explaining the organization's behavior and performance as being influenced by stakeholders who inhabit its environment. Resource dependence and institutional theory are employed to give theoretical support to the stakeholder. At the end of the paper, a diagram representing the theoretical framework is presented.

scholarly journals Can environmental regulation solve China's employment dilemma: Empirical analysis based on scale and structure effects

2021 ◽  
Author(s):  
Mengjie Li ◽  
Weijian Du
Keyword(s):  
Environmental Regulation ◽  
Institutional Environment ◽  
Environmental Regulations ◽  
Employment Structure ◽  
Theoretical Support ◽  
Regulation Policy ◽  
Enterprise Innovation ◽  
Internal And External Factors ◽  
Relationship Of ◽  
The Relationship

Abstract Whether the environmental regulation policy can achieve the double dividend of pollution control and employment promotion is a problem worthy of further discussion. This paper studies the effect of environmental regulation on employment scale and employment structure. Based on the matching data, the empirical results show that environmental regulations enhance the employment scale of enterprise. From the perspective of employment structure, labor redistribution, which is caused by environmental regulation, is mainly reflected in the employment creation and employment destruction effects, which lead to the optimization of the employment structure. Further research shows that environmental regulations expand employment scale but have different impacts on the employment structure in the developed and undeveloped regions of China. In addition, internal and external factors, such as enterprise innovation and institutional environment, may affect the relationship of environmental regulation and employment of enterprise. This paper provides theoretical support for the promotion of the construction of ecological civilizations and the solving of the employment dilemma.

Synthesis of N-Lobed Involute Modified Noncircular Bevel Gears

2014 ◽  
Author(s):  
Kan Shi ◽  
Jiqiang Xia ◽  
Chunjie Wang ◽  
Chunming Geng ◽  
Rui Wang
Keyword(s):  
3D Models ◽  
Tooth Profile ◽  
Transmission Ratio ◽  
Bevel Gears ◽  
Pure Rolling ◽  
Modification Method ◽  
Variable Transmission ◽  
Pitch Curve ◽  
Relationship Of ◽  
The Relationship

Noncircular bevel gears (NBG) can achieve variable transmission between intersecting axes. The transmission ratio function is obtained when giving the involute NBG’ pitch curve equations during their pure rolling. The relationship of least number of teeth avoiding undercutting and the pitch curve curvature of NBG is analyzed. Being directed against N-lobed involute NBG drive, a kind of varying-coefficient-profile-shift-modification method has been presented. The equations of the modified addendum and dedendum curves are implemented. The algorithm for generating tooth profile of NBG by shaper cutter under UG platform is proposed and significant examples are included. The 3D models of a pair of conjugate N-lobed involute modified NBG are demonstrated to verify the correctness of this modification method.

Measurement Error of Left-Turn Vehicle Trajectory by Video Detection

2013 ◽  
Vol 401-403 ◽  
pp. 1068-1073
Author(s):  
Bo Hang Liu ◽  
Xiao Xia Liu ◽  
Shi Jie Zhang
Keyword(s):  
Measurement Error ◽  
Research Field ◽  
Left Turn ◽  
Theoretical Support ◽  
Detection Technology ◽  
Video Detection ◽  
Transverse Distance ◽  
Vehicle Trajectory ◽  
Relationship Of ◽  
The Relationship

The video detection technology is a very active branch in the research field of machine vision, and the detection of vehicle trajectory by the stationary camera has become more and more important. However, there is little research on the measurement error of left-turn vehicles trajectory.This paper not only studies the relationship between the measurement error and longitudinal distance; but also relationship of measurement error and transverse distance. Their mathematical models are constructed and each of the variables in the models is analyzed. Then in the case analysis of certain intersection, the experimental results have shown that the proposed funtions can describe the relationship between measurement error and the parameters. It can provide the theoretical support for the measurement error problems of obtaining trajectory by video detection.

Study on Effects of Input Rotational Speed on Output Torque of Magnetorheological Torque Servo

2010 ◽  
Vol 37-38 ◽  
pp. 1278-1282
Author(s):  
Feng Lu ◽  
Di Zheng ◽  
Yong Jie Shi ◽  
Bin Huang
Keyword(s):  
Shear Stress ◽  
Rotational Speed ◽  
Critical Speed ◽  
Magnetorheological Fluid ◽  
Factors Affecting ◽  
Output Torque ◽  
Critical Rotational Speed ◽  
Working Principle ◽  
Relationship Of ◽  
The Relationship

Magnetorheological fluid torque servo (MRT) is a novel torque generating and controlling device. It converts the rotational input of active shearing disc into the torque output of passive shearing disc by controlling the rheological property of the magnetorheological fluid. In this paper, the working principle of the MRT was introduced. The effects of the input rotational speed on the shear stress of the magnetorheological fluid and then the output torque were analyzed. The model describing the relationship of the output torque with respect to the rotational speed of the active shearing disc as well as to other parameters was established. A critical rotational speed was deduced. The factors affecting the critical speed were discussed, and an experiment was conducted to ascertain the validity of the theoretical analysis.

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