Theoretical analysis of the yarn fracture mechanism of self-twist jet vortex spinning

2016 ◽  
Vol 87 (11) ◽  
pp. 1394-1402 ◽  
Author(s):  
Chenchen Han ◽  
Wenliang Xue ◽  
Longdi Cheng ◽  
Zhuanyong Zou
Keyword(s):  
Theoretical Analysis ◽  
Tensile Properties ◽  
Contact Area ◽  
Fracture Mechanism ◽  
The Self ◽  
Mutual Contact ◽  
Spun Yarn ◽  
Spinning Speed

According to the yarn mechanism of self-twist jet vortex spinning, this article analyzes the structure and the fracture mechanism of self-twist jet vortex spinning yarn. Combined with experiments, this article established that the fiber in self-twist jet vortex spun yarn has self-twist, which increases the mutual contact area and the cohesion between the fibers in the yarn. This is helpful to improve the evenness and tensile properties of jet vortex spun yarn. The self-twist jet vortex spinning can keep the high spinning speed of the jet vortex spinning at the same time. The research on self-twist jet vortex spinning lays the foundation for the research and the development of jet vortex spinning.

scholarly journals Self-realisation, self-actualisation and self-efficacy concepts theoretical analysis

2021 ◽  
Vol 27 (2) ◽  
pp. 7-15
Author(s):  
Tatyana Petrovna Opekina ◽  
Natalya Sergeevna Shipova
Keyword(s):  
Comparative Analysis ◽  
Theoretical Analysis ◽  
Goal Setting ◽  
Self Efficacy ◽  
Theoretical Study ◽  
The Self ◽  
Social Orientation ◽  
Similarities And Differences ◽  
The Individual ◽  
External Forces

This article presents the results of a theoretical study of self-realisation, self-actualisation and self-efficacy phenomena. The main aspects of understanding and correlating these phenomena in classical and modern Russian and foreign psychology are described. The highlighted concepts related to the phenomenon of self-realisation, both in the field of psychology and pedagogy. The similarities and differences of the self-realisation, self-actualisation, self-efficacy phenomena, as well as their correlation and comparison are presented. A comparative analysis of the studied concepts is given. According to the results of the theoretical analysis, the processes of self-realisation and self-actualisation are based on the inner motivation of a person to grow, develop personality, realise its potential. Both of these processes, due to their subjectivity, are difficult to observe and measure from the outside. We have highlighted the main differences, consisting in a greater awareness and orderliness of the process of self-realisation, as well as its predominantly "social" orientation, while self-actualisation is often associated with the struggle with external forces, the desire for self-realisation is rather approved and supported by the society. The concepts of self-realisation and self-efficacy are united by their inherent representation in the external plane of the life of the individual, as well as awareness, activity, goal-setting, and an orientation towards achieving success. In contrast to self-efficacy, self-release is a process rather than a sustainable phenomenon, and can be expressed both externally and internally through a connection with the value-semantic, motivational spheres of the individual.

scholarly journals The representation features of the personal experience substructures of students with different self-concept profiles

2019 ◽  
Vol 32 (2) ◽  
pp. 30-35
Author(s):  
P. Sevostianov
Keyword(s):  
Theoretical Analysis ◽  
Personal Experience ◽  
Self Regulation ◽  
Well Being ◽  
The Self ◽  
Negative Evaluation ◽  
Self Concept ◽  
General Level ◽  
Individual Experience ◽  
Self Perception

 The article is devoted to the substructures of the personal component of individual experience research. In the framework of theoretical analysis, the structural organization of individual experience is reviewed. The author's position consists in sticking to the O.M. Laktionov three-component model of the experience. During the theoretical analysis contemporary studies devoted to the study of individual experience are reviewed. Several substructures of the personal component of individual experience, that require attentive study, are defined. The self-concept notion is analyzed. For the first time, an analysis of the features of relationship between the feeling of self-concept well-being and the personal experience substructures are presented. The analysis, described in this article, is a continuation of the research, which devoted to the study of self-concept in the framework of the structure of the students` personal component of individual experience, during which on the basis of analysis the substructures of personal experience formation features the self-concept profiles were received. Four self-concept profiles were taken into consideration out of the results of the study: the "Conflict profile": persons for whom the simultaneous inclusion of the prosperous and problematic types of self-perception is inherent; "Prosperous profile": persons for whom the prosperous self-concept perception, that combines with low level of problem self-concept perception, is inherent; "Tendency to well-being": persons who are characterized by the tendency to decrease the negative evaluation of their self-concept, having the average indicators of their self-concept well-being; "Tendency to conflict": individuals, who are characterized by average indicators of their self-concept perception in a problematic context in a tendency to decrease the assessment of their self-concept well-being. Directly in the course of the work, described in the article, a comparative analysis of students with different profiles was performed, that was based on the degree of representation of individual experience personal component substructures. The comparison was made using the rank criterion of Kruskal-Wallis. During the comparison, the following results were obtained: for the students with different self-concept profiles was not revealed any differences in the indicators of self-esteem, neuroticism, extraversion, cooperation, conscientiousness, planning self-regulation, self-regulation flexibility, goal purpose in life orientation, and such values as conformance, traditions, kindness, universality and security. Openness to experience, modeling, results estimation, independence, general level of self-regulation, process and result orientation, locus of control myself, general life meaningfulness and independence as a value were the most expressive for students with a prosperous self-concept profile, and the least expressive – for students with a conflict profile and profile with a tendency to conflict. Programming, as well as the stimulation, achievement and power values were the most expressive for the students with a tendency to a prosperous self-perception. The locus of life control and hedonism as the value was found the most expressive among the students with a tendency to a conflict in their own self-perception; the least expressive it was for students with a prosperous profile.

On minimum of static breakdown voltage for gas-filled gap

2021 ◽  
pp. 59-64
Author(s):  
A.V. Kozyrev ◽  
◽  
V.Yu. Kozhevnikov ◽  
A.O. Kokovin ◽  
S.Y. Medvedev ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Electric Field ◽  
Breakdown Voltage ◽  
Spherical Geometry ◽  
The Self ◽  
Planar Geometry ◽  
Plane Parallel ◽  
Discharge Gap

Based on the self-sustaining condition of the discharge, a theoretical analysis was carried out in order to identify the minimum possible breakdown voltage. It is shown that a weak nonuniformity of the electric field in the discharge gap leads to an increase in the static breakdown voltage in comparison with the Paschen’s law. A strong nonuniformity of the field in diodes of coaxial and spherical geometry also cannot provide a decrease in the minimum breakdown voltage in comparison with the case of a plane-parallel gap. It is proved that of all symmetric geometries of a gas-filled diode, the planar geometry has the lowest breakdown voltage.

Design and Tests of Audio Directional System

2012 ◽  
Vol 198-199 ◽  
pp. 1047-1052
Author(s):  
Yang Zhang ◽  
Li Min Tao
Keyword(s):  
Theoretical Analysis ◽  
Light Beam ◽  
Test Data ◽  
Harmonic Distortion ◽  
Experimental System ◽  
The Self ◽  
Far Field ◽  
Sound Beam ◽  
System Components ◽  
Working Principle

Audio directional system is a new-style loudspeaker, which can project the sound beam onto a given region as light beam. In this paper, the basic working principle and the system components of audio directional system are proposed. The total harmonic distortion of the self-demodulated signal is analyzed based on “Berktay far-field solution”. Besides, this paper has designed the audio directional experimental system whose performances have been tested. The shortcomings of the self-demodulation theory are pointed out after the comparison between the test data and the theoretical analysis results.

A Study on Physical Properties of Microfilament Composite Yarns

2016 ◽  
Vol 11 (3) ◽  
pp. 155892501601100 ◽  
Author(s):  
Esin Sarioğlu ◽  
Osman Babaarslan
Keyword(s):  
Tensile Properties ◽  
Textile Industry ◽  
Ring Spinning ◽  
Twist Factor ◽  
Statistical Effect ◽  
Spun Yarn ◽  
Spun Yarns ◽  
Yarn Count ◽  
Ring Spun Yarn ◽  
Sheath Material

In the textile industry, composite yarns with multifilament cores are used to impart strength. There are various spinning systems to produce composite core-spun yarns. In this study, to determine the effects of filament fineness on yarn characteristics of composite yarns, polyester filaments with medium, fine and micro fiber linear densities were used as the core portion and cotton fiber was used as the sheath material. Yarn samples were manufactured using a modified ring spinning system with four different yarn counts and constant twist factor (ae). The effect of filament linear density on yarn tensile properties, unevenness and imperfections was determined. Yarn evenness and tensile properties were compared with 100% cotton ring spun yarn and to each other. When relative amount of core increases, it was observed that composite yarns had improved tenacity and elongation compared to 100% cotton ring spun yarn. Although filament fineness was found to have a significant effect on the CVm % properties, there was no statistical effect on imperfections other than yarn count parameter.

Equivalent-Beam Theory of the Self-Anchored Suspension Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 801-805
Author(s):  
Biao Wei ◽  
Qing Yuan Zeng ◽  
Wei An Liu
Keyword(s):  
Mechanical Properties ◽  
Theoretical Analysis ◽  
Structural Response ◽  
Beam Theory ◽  
Suspension Bridge ◽  
The Self ◽  
Analysis Method ◽  
The Future

Taking one typical two-tower three-span self-anchored suspension bridge as an example, structural response has been characterized in detailed followed by its own construction steps. Meanwhile, the structure’s mechanics properties have been mathematically formulated through theoretical analysis method. Finally, the formulation has been further expressed by using a simplified beam subjected to external equivalent forces, and then the equivalent-beam theory of the self-anchored suspension bridge has been well established thereafter. As been demonstrated, the equivalent-beam theory can be easily and clearly applied to determine the vertical mechanical properties of the self-anchored suspension bridge, and could be utilized to guide the self-anchored suspension bridge deign in the future.

Design of Walking Mechanism for All-Terrain Mobile Platform

2015 ◽  
Vol 798 ◽  
pp. 64-69
Author(s):  
Fa Liang Zhou ◽  
Xiao Jun Xu ◽  
Cun Yun Pan ◽  
Hai Jun Xu
Keyword(s):  
Theoretical Analysis ◽  
Theoretical Basis ◽  
Parametric Design ◽  
Human Mobility ◽  
The Self ◽  
Mobile Platform ◽  
Parameter Design ◽  
Working Principle ◽  
Walking Mechanism ◽  
Structure Environment

The new all-terrain mobile platform can improve the human mobility in non-structure environment, which is mainly determined by the walking mechanism quality. In this paper, the walking mechanism structure is designed, and its working principle is analyzed. Theoretical analysis and parameter optimization are completed during the parameter design of the tracked circle, which verifies the parameter rationality of the self-tension mechanism. Besides, the dynamic analysis of the multi-degree of freedom suspension system is accomplished. The results show that the structure and parameter design of the walking mechanism is available, which provides theoretical basis for the new mobile platform parametric design.

Analysis of the Additional Twists on the Fiber Band in Compact Field of Compact Spinning

2011 ◽  
Vol 175-176 ◽  
pp. 380-384
Author(s):  
Jun Wang ◽  
Han Guang Liu ◽  
Jian Ping Yang ◽  
Guang Wei Chen ◽  
Ting Fu
Keyword(s):  
Mathematic Model ◽  
Factors Affecting ◽  
Tilting Angle ◽  
Compact Field ◽  
Spun Yarn ◽  
Compact Spinning ◽  
Spinning Speed ◽  
Suction Slot

Based on the analysis of the motion of fiber band in compact field, a mathematic model is proposed in this article. The factors affecting the additional twists and final twists of the compact spun yarn, such as diameter of the fiber band in the compact field, tilting angle of suction slot in profile tube and spinning speed, were discussed in detail. The validity of the model was validated by experiments.

Analysis and Research on the Picking Roller of the Half-Feed Peanut Combine Harvester

2014 ◽  
Vol 597 ◽  
pp. 502-506
Author(s):  
Xiao Lian Lü ◽  
Zhi Chao Hu ◽  
Bao Liang Peng
Keyword(s):  
Theoretical Analysis ◽  
Research And Development ◽  
Significant Influence ◽  
Loss Rate ◽  
Structural Parameters ◽  
The Self ◽  
The Core ◽  
Design Basis ◽  
Core Technology ◽  
Combine Harvester

Picking peanuts is the key operational link and the core technology of peanut combine harvester. On the basis the theoretical analysis of picking mechanism and structural parameters of the half-feed picking roller, and combined with the picking performance experimental, the structural parameters of the picking blades and blades quantity of picking roller were studied. The results show that: when the straight-shaped blade is picking, the picking force is strong, the broken branch and seedling phenomenon is serious, peanut broken rate and peanut with handle rate are higher; the arc-shaped blade reduced peanut damage, and effectively reduced the rate of the peanut with handle. The picking blade radian has a large impact to the peanut broken and loss rate. When the blade radian is 70° and the blade radius is 35mm, total loss rate is the lowest on the picking segment of the blade. The blade quantity has significant influence to the peanut broken and loss rate. The peanut broken rate of the 8 blades is 2 to 3 times of the 4 and 6 blades; the picking net rate of the 4 blades is much lower than 6 and 8 blades. The self-design the picking roller is 6 arc-shaped blades, the blade radius is 35mm, and the blade radian is 70°. The study provides the design basis for the research and development of the half-feed peanut picking device.

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