scholarly journals Research on double-faced jacquard fabric with compound full-backed structure of three wefts

2021 ◽  
Vol 72 (05) ◽  
pp. 491-502
Author(s):  
LINLIN BAI ◽  
JIU ZHOU
Keyword(s):  
Design Method ◽  
Single Layer ◽  
Colour Difference ◽  
Compound Structure ◽  
Critical Position ◽  
Shading Effect ◽  
Transition Effect ◽  
Structure Database ◽  
Step Number ◽  
Colour Effect

Weft-backed structures with compound weft colours can express the mixed colour effect. However, this structure is not suitable for jacquard fabrics with a double-faced shading effect in the traditional single layer design mode. Taking twenty-thread sateen with a step number (S) of 7 as an example, this paper investigates a design method for compound full-backed structure with three shaded-weave databases (SWDs) by selecting the primary weaves (PWs), designing the compound full-backed technical points and establishing the compound structure database with three SWDs. With this design method, a double-faced shading effect in combination with non-backed and full-backed effects on different sides of the jacquard fabric at the same position is generated. The fabric colour card was produced with three SWDs and three sets of different coloured wefts, and their colour values were measured, followed by an analysis of the compound structures on the reverse side, lightness, colour purity and colour difference (DE*ab) of the specimens. The results showed that the three covering effects on the reverse side, partly covered, critical position and totally covered, could be adjusted by controlling the step number and the transition direction of PW-C. For the specimens on the edges of the fabric colour card, their lightness and colour purity values showed a uniform transition effect along with the shading process; their colour differences ranged from 1.23 to 3.69, both in the range of 2–5, and showed a trace or slight colour difference between two adjacent fabric specimens, indicating that the colour shading effect with the three SWDs is stable.

Design Principle and Method of Visual 2.5D Effect Black-and-White Digital Jacquard Fabric

2011 ◽  
Vol 418-420 ◽  
pp. 2215-2218
Author(s):  
Jiu Zhou ◽  
Lan Qian Tang ◽  
Ding Ting Hu ◽  
Jie Yuan Liu
Keyword(s):  
Design Principle ◽  
Design Method ◽  
Compound Structure ◽  
Shading Effect ◽  
Black And White ◽  
Full Color ◽  
Proper Design ◽  
Design Innovation

Research on innovation design of visual 2.5D effect black-and-white digital jacquard fabric is carried out based on layered-combination design mode and design method of full-color compound structure. Black-and-white digital jacquard fabric designed by combining two digital patterns together can express two patterns on face of fabric at same time. As long as lustrous yarns are employed to produce jacquard fabric with full-color compound structure, and juxtaposed colorless yarns cannot be covered by each other, black-and-white digital jacquard fabric could express good grey shading effect. Viewed from different angle, two overlapping patterns will show figured shot effect so-called visual 2.5D effect. In this paper, design principle and method of visual 2.5D effect black-and-white digital jacquard fabric were introduced clearly with proper design illustrations. It provides good value for design innovation of black-and-white digital jacquard fabric.

Research and Creation of Printing-Like Effect Digital Jacquard Fabric

2011 ◽  
Vol 295-297 ◽  
pp. 2568-2571 ◽  
Author(s):  
Jiu Zhou
Keyword(s):  
Design Method ◽  
Single Layer ◽  
Color Theory ◽  
Compound Structure ◽  
Innovative Design ◽  
Full Color ◽  
Layer Structures ◽  
Proper Design ◽  
Layered Design ◽  
Fabric Design

In this paper, innovative design of printing-like effect digital jacquard fabric based on layered-combination design mode is introduced with proper design illustrations. Directly borrowed from layered design method of digital image and corresponding color theory, the innovative design method theoretically can be divided into colorless mode and colorful mode two parts. Following design method of full-color compound structure invented specially for layered-combination design mode, several colorless single-layer structures can be combined to form a full-color compound structure, which enables digital jacquard fabric to express printing-like effect with mega-level mixed colors. The results of study provided the possibility of opening creative horizon and aesthetical dimension for jacquard fabric design.

Angle and polarization-independent miniaturized UWB FSS design

2021 ◽  
pp. 1-9
Author(s):  
Yanning Yuan ◽  
Yuchen Zhao ◽  
Xiaoli Xi
Keyword(s):  
Design Method ◽  
Incident Angle ◽  
Stop Band ◽  
Single Layer ◽  
Wireless Systems ◽  
Frequency Selective Surface ◽  
Ultra Wideband ◽  
Band Frequency ◽  
Gain Enhancement ◽  
Polarization Independent

Abstract A single-layer ultra-wideband (UWB) stop-band frequency selective surface (FSS) has several advantages in wireless systems, including a simple design, low debugging complexity, and an appropriate thickness. This study proposes a miniaturized UWB stop-band FSS design. The proposed FSS structure consists of a square-loop and metalized vias that are arranged on a single layer substrate; it has an excellent angle and polarization-independent characteristics. At an incident angle of 60°, the polarization response frequencies of the transverse electric and magnetic modes only shifted by 0.003 f0 and 0.007 f0, respectively. The equivalent circuit models of the square-loop and metallized vias structure are analysed and the accuracy of the calculation is evaluated by comparing the electromagnetic simulation. The 20 × 20 array constitutes an FSS reflector with a unit size of 4.2 mm × 4.2 mm (less than one-twentieth of the wavelength of 3 GHz), which realizes an UWB quasi-constant gain enhancement (in-band flatness is <0.5 dB). Finally, the simulation results were verified through sample processing and measurement; consistent results were obtained. The FSS miniaturization design method proposed in this study could be applied to the design of passband FSS (complementary structure), antennas and filters, among other applications.

Elastic Strength of Defective Steel Bolt Group under Eccentric Load Design

2018 ◽  
Vol 773 ◽  
pp. 299-304
Author(s):  
Jen Jen Yang ◽  
Kun Ze He ◽  
Wei Ting Hsu
Keyword(s):  
Geometric Distribution ◽  
Design Method ◽  
Group Analysis ◽  
Steel Structure ◽  
Steel Structures ◽  
Strength Analysis ◽  
Material Strength ◽  
Eccentric Load ◽  
Critical Position ◽  
Design Strength

Steel bolt groups are often used for joining steel structures. The design strength of the steel bolt group is related to the geometric distribution, the eccentric load distance, the material strength and the load angle, thus making the analysis complicated and not easy for the user. The existing analysis methods are two kinds of elasticity and ultimate analysis. Both methods consider the stress distribution of each steel bolt and find the steel bolt at the critical position is obtained, the design load analysis is deduced. This study will consider the geometric distribution of steel bolting group affected, for a row, two rows, three rows and four rows of bolt group, considering different eccentric distance and angle of influence. Using a simple elastic analysis method to Studied the strength analysis results produced when a corner bolt is damaged due to a defect. The results show that the greater the eccentric load distance, the lower the design strength, and the load change on the vertical is more obvious than the horizontal. When the corner of the steel bolt group is removed, its design strength is likely to decrease, but at low eccentricity distance and large angles, the strength of the complete bolt is higher. This study organizes the design method of steel bolts and reviews the geometric rules of the bolt group analysis. It founded that the regular geometry needs to be reviewed in the case of large eccentric loads with small eccentricities. This study for the bolt connections strength of a certain understanding and awareness, expect the future for the safety of steel structure contribute.

scholarly journals Rutting Resistance Evaluation of Structural Combinations of Asphalt Pavement Subjected to Heavy Duty

2012 ◽  
Vol 5 ◽  
pp. 316-321 ◽  
Author(s):  
Ze Jiao Dong ◽  
Xiang Bing Gong ◽  
Gui Qing Xiao ◽  
Teng Long
Keyword(s):  
Structural Design ◽  
Design Method ◽  
Asphalt Pavement ◽  
Single Layer ◽  
Asphalt Mixtures ◽  
Heavy Duty ◽  
Wheel Load ◽  
Rutting Resistance ◽  
Pavement Structures ◽  
Resistance Performance

Rut，referred to as a common damage of asphalt pavement ，is still a knotty problem to pavement researchers. Many reasons could cause rut, among which heavy duty, improper pavement structural combination design are two principal factors. As a result, three pavement structures and seven types of asphalt mixtures were used to evaluate the rutting resistance performance of different structural combinations. At first, through Marshall design method, the properties of asphalt mixtures were obtained such as gradation, asphalt content and so on. Based on the comparison of gradations and anti-rutting additives, the single layer rut was tested by wheel tracking test. Then, in order to consider influence of pavement structural design on pavement rut, six types of structure combinations under identical heavy duty condition were designed to perform rutting test. It shows that anti-rutting gradation and anti-rutting additives can improve rutting resistance performance of single layer. Also, a proper structural design could provide a better bearing capacity of wheel load even for heavy duty. It is better to integrate the anti-rutting gradation and anti-rutting additives into structural design. In this paper the results provide some new insight into the relationship between rutting resistance and mixture gradation, anti-rutting additives, heavy duty and structural combination. The consideration of these factors will give a better pavement design.

Two- and Four-Pole Multilayer SIW Filter with High Selectivity and Higher-Order Mode Suppression

Frequenz ◽  
2019 ◽  
Vol 73 (5-6) ◽  
pp. 209-217 ◽  
Author(s):  
Dinghong Jia ◽  
Quanyuan Feng ◽  
Qianyin Xiang
Keyword(s):  
High Selectivity ◽  
Filter Design ◽  
Design Method ◽  
Single Layer ◽  
Cross Coupling ◽  
Bandpass Filters ◽  
Coupling Scheme ◽  
Transmission Zeros ◽  
Compact Size ◽  
Spurious Mode

Abstract This letter presents an approach to design two-pole source-load coupling and four-pole cross-coupling substrate integrated waveguide (SIW) bandpass filters based on multilayer process. Utilizing the field distribution, the vertical magnetic and electric coupling of fundamental mode is designed by suppressing the first spurious mode. Then, source-load and cross-coupling schemes are realized with controllable features in two-pole and four-pole filters, respectively. The harmonic passband produced by TE102 mode can be suppressed by proper coupling technique enabling the connection with TE102 mode in two- and four-pole filter designs, respectively. Three transmission zeros, which are derived from source-load coupling, are introduced around the passband of two-pole filter to improve its selectivity. In the four-pole filter design, a six-order cross-coupling scheme including source and load produces four transmission zeros around the passband, leading to a sharp selectivity. In addition, another transmission zero is generated at the adjacent location of the passband to improve the out-of-band rejection. Compared with conventional horizontally coupled filters made of single layer, the proposed filters show a compact size. To demonstrate the proposed design method, a two-pole and a four-pole double-layered SIW bandpass filters are fabricated and measured. Measured results show that the proposed filters exhibit high selectivity and good out-of-band rejection, as well as a good agreement between simulated and measured results.

Double-faced shading effect based on two wefts full-backed structure for traditional weft-backed woven fabrics

2019 ◽  
Vol 32 (2) ◽  
pp. 231-243
Author(s):  
Linlin Bai ◽  
Jiu Zhou
Keyword(s):  
Design Method ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Color Purity ◽  
Shading Effect ◽  
Content Type ◽  
Different Color ◽  
Shading Effects ◽  
Color Rendering ◽  
Color Shading

Purpose The purpose of this paper, on innovative design of traditional weft-backed woven fabric, is to investigate a design principle and method for full-backed structure with double-faced shading effect to realize two types of double-faced shading effects for traditional weft-backed fabric that are impossible to be realized under plane design mode. In addition, the study on the color rendering law is conducive to the design application, and the effectiveness of the design method has been verified by the design practices. Design/methodology/approach This paper presents a design method for full-backed structure with two shaded weave databases (SWDs) by selecting two primary weaves (PWs), establishing the corresponding SWDs, selecting the proper compound structures for database of full-backed structure with double-faced shading effect. Color card fabric with 544 specimens is produced and their color values are measured, their color difference and variance are analyzed to evaluate the color rendering characteristics. Finally, double-faced weft-backed fabrics are produced under layered-combination design mode to verify the practicality of full-backed structure with double-faced shading effect. Findings Weft-backed woven fabrics with “SPDC” (same pattern and different color) and “DPDC” (different pattern and different color) shading effects can be produced using full-backed structure with double-faced shading effect. The color expression is extremely enhanced (136 compound structures on one side for one color weft). In the shading process, two sets of wefts do not affect each other, and stable and ideal color shading effect with high color purity can be expressed according to the analyses on the L* (lightness) values, color purity, color differences (0.47–3.20) and variance (0.25–1.21) of the color card fabric. Originality/value Breaking through the structural limitations and achieving the double-faced shading effects that cannot be expressed in plane design mode. The research on two weft-backed fabric with the most basic weft-backed structure provides not only a theoretical base for further study on weft-backed structures, but also some references for structure innovation design of traditional weft-backed woven fabrics.

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