Wyniki wyszukiwania - BazTech

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Hidden Messages: Connotation analysis of Textile Trademarks in the Republic of China (1912-1949)

Cong Tianzhu, Zhang Yi, Shen Linlin, Cui Rongrong

Fibres & Textiles in Eastern Europe

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2023

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Vol. 31, no. 2

56--64

EN

This study analyses trademarks of the textile industry issued between 1912–1949 in the Republic of China, revealing the trademarks’ art features and hidden messages. The trademarks’ images and information folders were critically examined within their historical context. The work, by analysing the themes and patterns of the trademarks, revealed that the people-oriented conception, humanistic spirit, nationalist sentiment and the multiple connotations of era development were behind the trademarks, which answers questions about the social connotations of textile trademarks of the Republic of China and also gives us some guidance to understand how to use these connotations for innovation trademark design to inherit better traditional culture in the future.

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Cultural Interaction: The Transformation of Textile design for Traditional Cheongsam in the Republic of China

Zhang Jingnan, Zhang Yi, Cui Rongrong

Fibres & Textiles in Eastern Europe

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2022

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Vol. 30, no. 6

19--26

EN

This paper aims to discuss the artistic characteristics of traditional cheongsam and the transformation that has taken place in cheongsam textile design in the Republic of China. By analysing a collection consisting of 259 traditional cheongsam material samples in various museums such as the China Silk Archives in Suzhou, we explored the transformation of cheongsam textile design during the Republic of China from the perspective of Eastern and Western art cultural exchanges and explored the spread of Western artistic thought in China. Our search shows that, firstly, with the development of industrialization, the traditional cheongsam textile business absorbed new design concepts; secondly, in terms of material selection and pattern style, it widened the range of fabrics used and broke the monotony of traditional Chinese patterns. Moreover, it reduced connotations of social class implied by traditional textile design. Finally, these textile designs reflect the progress that has been made in the development of this artistic trend and the cultural fusion of Eastern and Western arts during the Republic of China.

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Virtual–real fusion maintainability verification based on adaptive weighting and truncated spot method

Ge Zhexue, Zhang Yi, Wang Fang, Luo Xu, Yang Yongmin

Eksploatacja i Niezawodność

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2022

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Vol. 24, no. 4

738--746

EN

Maintainability is an important general quality characteristic of products. Insufficient maintainability will lead to long maintenance time and high maintenance cost, thus affecting the availability of products. Maintainability verification is an important means to ensure maintainability meets design requirements. However, the cost of traditional real maintainability verification method is very high, and the virtual maintenance method has insufficient verification accuracy due to the lack of large maintenance force feedback when the human body is moving. In order to reduce the evaluation error and test sample size, the paper conducts maintainability verification based on the mixed physical and virtual maintainability test scenarios. Aiming at the problem that traditional methods are difficult to deal with the real test information and synchronous virtual simulation information in the test process, this study proposes a virtual–real fusion maintainability evaluation algorithm based on adaptive weighting and truncated SPOT (Sequential Posterior Odd Test) method. It can weigh real test information and virtual human simulation information adaptively to obtain a virtual–real fusion maintainability test sample. Then, the SPOT method is used to evaluate the maintainability of small samples. The adjustment of valve clearance, replacement of air filter element and replacement of starting motor maintenance tasks of ship engine are taken as examples for demonstration. The virtual–real fusion and virtual maintainability verification methods are respectively used for verification, and compared with the physical maintenance scenario constructed by 3D printing, indicating that the accuracy of virtual–real fusion maintainability test verification is 89%, while the virtual maintainability verification is only 33%.

4

An inverse procedure for characterization of material parameters of passive skeletal muscle using FEM and experimental data

Liu Shuailong, Sang Jianbing, Zhang Yi, Zhao Luming, Liu Guirong

Journal of Theoretical and Applied Mechanics

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2020

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Vol. 58 nr 1

247--259

EN

This work develops an inverse procedure which combines an improved niche genetic algorithm, finite element models and experimental data to identify material parameters of biological tissues behaving like hyperelastic materials. A novel objective function is proposed with two coefficients, which controls the contributions in a well-balanced fashion, respectively, for the small deformation stage and the large deformation stage. This allows us to obtain a global minimizer (of material constants) for the error between FEM solutions and experimental data. Moreover, simple uniaxial compression tests at two different angles (0◦ and 90◦) with respect to the muscle fiber orientation are performed on fresh muscle tissues. This enables us to obtain anisotropic properties of the muscle tissue from the present inverse procedure. The result shows that the proposed inverse procedure is stable and reliable to determine material constants in hyperelastic models for soft biological tissues like skeletal muscles considering anisotropy.

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Thermal damage of CFRP laminate in fiber laser cutting process and its impact on the mechanical behavior and strain distribution

Li Maojun, Gan Guocui, Zhang Yi, Yang Xujing

Archives of Civil and Mechanical Engineering

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2019

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Vol. 19, no. 4

1511--1522

EN

Fiber laser cutting is a promising alternative to the conventional methods in machining CFRP with high efficiency, while the influence of machined quality on strain distribution and mechanical behavior of CFRP laminates is yet not fully understand. The aim of this paper is to study the effect of laser cutting parameters on thermal defects and related mechanical performance. DIC technique was successfully employed to assess full-field strain distribution under tensile loading. The relationship between strain distribution and failure evolution/mode was also investigated. Results showed that various thermal defects including matrix recession, resin decomposition, fiber burrs and delamination were observed on entry and exit surfaces, while microcracks, cavities and striations were prevalent on machined surface. Tensile strength of CFRP laminate with open hole was highly related to applied laser processing parameters. DIC technique indicated that the crack propagation and failure mode were in good agreement with the high level of strains developed around the hole. Matrix-fiber interface cracking, fiber breakage and splitting were the main failure modes at test cessation.

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An improved UPLC method for determining uric acid in rat serum and comparison study with commercial colorimetric kits

Wen Shaoshi, Zhang Zixin, Chen Xiaopeng, Liu Jinchang, Yu Haiyang, Han Lifeng, Jin Lijun, Zhang Yi, Wang Tao

Acta Chromatographica

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2019

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Vol. 31, no. 3

201--205

EN

Uric acid (UA) is the final product of purine metabolism in humans. Elevated serum UA levels lead to the development of hyperuricemia, gout, kidney diseases, and metabolic syndrome. Accurate determination of UA plays a critical role in clinical diagnosis and laboratory investigation. An ultra-performance liquid chromatography (UPLC) with ultraviolet detection method has been developed and validated for UA analysis. Separation was achieved by a Waters ethylene bridged hybrid (BEH) Amide column (50 mm × 2.1 mm i.d., 1.7 μm) with acetonitrile and 0.1% acetic acid in deionized water in the proportion of 90 to 10 (v/v) as the mobile phase. The limit of detection and limit of quantification were 0.09 and 0.18 μmol/L, respectively. The method was validated by evaluating recovery (98.37–104.20%), accuracy (0.47–0.90%), and precision (1.24–1.81% for intra-batch and 1.76–3.98% for inter-batch). This method was then applied to UA determination in rat serum of hyperuricemia model. The results from UPLC, high-performance liquid chromatography (HPLC), and uric acid kits (phosphor-tungstic acid-based kit and uricase-based kit) were compared. The UPLC results were in very good agreement with HPLC. The developed method could be employed as a useful tool for the determination of UA in biofluids.