Design 3D Garments for Scanned Human Bodies

Dongliang Zhang,Jin Wang (사)한국CDE학회 2013 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8

In this study we present a 3D garment design method for scanned human bodies. Firstly, a slicing method is proposed to reconstruct a symmetric body from a scanned human body to make it suitable for garment design. Secondly, a sketch modeling method is used to interactively create the garment surface based on the new body. Thirdly, seam lines are drawn on the garment surface, and then a flattening algorithm is employed to design 2D patterns. Finally, a seam line template is used to design the same style for different bodies. Experiments show that the resulted garment well fits the scanned body. Our method provides an efficient design tool for customizing garments in the fashion industry.

Simulation study on CFRP strengthened reinforced concrete beam under four-point bending

Dongliang Zhang,Qingyuan Wang,Jiangfeng Dong 사단법인 한국계산역학회 2016 Computers and Concrete, An International Journal Vol.17 No.3

This paper presents numerical modeling of the structural behavior of CFRP (carbon fiber reinforced polymer) strengthened RC (reinforced concrete) beams under four-point bending. Simulation of debonding at the CFRP-concrete interface was focused, as it is the main failure mode of CFRP strengthened RC beams. Here, cohesive layer was employed to model the onset of debonding, which further helps to describe the post debonding behavior of the CFRP strengthened RC beam. In addition, the XFEM approach was applied to investigate the effects of crack localization on strain field on CFRP sheet and rebar. The strains obtained from the XFEM correlate better to the test results than that from CDP (concrete damaged plasticity) model. However, there is a large discrepancy between the experimental and simulated loaddisplacement relationships, which is due to the simplification of concrete constitutive law.

Design 3D garments for scanned human bodies

Dongliang Zhang,Jin Wang,Yuping Yang 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.7

We present a 3D garment design method for scanned human bodies. First, a slicing method is proposed to reconstruct a symmetricbody from a scanned human body to make it suitable for garment design. Second, a sketch modeling method is used to interactively createa garment surface based on the symmetric body. Third, seam lines are drawn on the garment surface, and then a flattening algorithmis employed to design 2D patterns. Finally, a seam line template is used to design the same style of garments for different bodies. Experimentsshow that the resulting garment fits the scanned body well. Our method provides an efficient design tool for customizing garmentsin the fashion industry.

Optimized interfacial compatibility of carbon fiber and epoxy resin via controllable thickness and activated ingredients of polydopamine layer

Wu Dongliang,Xing Yuxuan,Zhang Denglu,Hao Zhenna,Dong Qi,Han Yongqin,Liu Lei,Wang Maoju,Zhang Ruliang 한국탄소학회 2024 Carbon Letters Vol.34 No.1

In this work, the trend in the performance of carbon fiber (CF) and its composite during self-polymerization of polydopamine (PDA) at carbon fiber surface was investigated by varying the self-polymerization time of dopamine in an aqueous solution. Research has shown that the PDA coating elevated the surface roughness and polarity of the inert fiber. The tensile strength of single carbon fiber was significantly improved, especially after 9 h of polydopamine self-polymerization, increasing by 18.64% compared with that of desized carbon fiber. Moreover, the interlaminar shear strength (ILSS) of CF-PDA9-based composites was 35.06% higher than that of desized CF-based composites. This research will provide a deep insight into the thickness and activated ingredients of dopamine oxidation and self-polymerization on interfacial compatibility of carbon fiber/epoxy resin composites.

Modelling and Control of Nine-Switch Converter-Based DFIG Wind Power System

Dongliang Liu,Xu Zhang,Lei Pan,Aqiang Li 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.6

In this paper, nine-switch converter (NSC) is used to replace the Back-to-Back converter of DFIG wind power system. In order to simplify the control process and improve the performance, the switching function model of nine-switch converter under ABC coordinate system is established, and the mapping relationship between the parameters of NSC’s loads and those of DFIG wind energy conversion system is given. Meanwhile, a Resonant-proportional-integral (Resonant-PI) control strategy for NSC-based DFIG wind energy conversion system is proposed, and the PI controller is used for static control under steady state and the resonant controller for suppressing harmonic content in this method. The proposed method performs better than PI control in harmonic content and dynamic response. The simulations and experimental results verify the validity and reliability of the proposed mathematical model and control algorithm.

Research Progress on Non-coding RNAs in Cholesteatoma of the Middle Ear

Dongliang Liu,Hang Zhang,Xiulan Ma,Yaodong Dong 대한이비인후과학회 2023 Clinical and Experimental Otorhinolaryngology Vol.16 No.2

Cholesteatoma of the middle ear is a common disease in otolaryngology that is receiving increasing attention. It is estimat-ed that over five million people around the world have suffered from middle ear cholesteatoma. The annual incidence ofmiddle ear cholesteatoma has been reported to be 9.2 per 100,000 in adults and 3 per 100,000 in children. Without timelydiscovery and intervention, cholesteatomas can become perilously large and damage intratemporal structures, causing vari-ous intracranial and extracranial complications. No practical nonsurgical treatments are currently available. Although multi-ple hypotheses exist, research directions have consistently focused on cell proliferation, apoptosis, and bone destruction. Non-coding RNAs (ncRNAs), especially microRNAs (miRNAs), long ncRNAs (lncRNAs), and circular RNAs (circRNAs),have recently received increasing attention because of their key roles in gene expression, cell cycle regulation, and the de-velopment of many diseases. Although ncRNAs are not involved in protein translation, they are abundant in the genome,with only approximately 2% of genes encoding proteins and the remaining approximately 98% encoding ncRNAs. Thepurpose of this review is to summarize the current state of knowledge regarding the specific role of ncRNAs in middle earcholesteatoma.

Correction to: Modelling and Control of Nine-Switch Converter-Based DFIG Wind Power System

Dongliang Liu,Xu Zhang,Pan Lei,Li Aqiang 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.2

Calcium phosphate with well controlled nanostructure for tissue engineering

Dongliang Jiang,Jingxian Zhang 한국물리학회 2009 Current Applied Physics Vol.9 No.3

Calcium phosphates comprise a large family of compounds with important biological applications, including osteologic implant coatings, grafts, scaffolds and bone cavity fillings, and vehicles for drug, protein and gene delivery, due to its similarity with the mineral constituents of human bones and teeth. Properties of calcium phosphate, including bioactivity, biocompatibility, solubility, mechanical properties and absorption can be tailored over wide ranges by controlling the particle composition, size, morphology and assembly. For these reasons, it is of great importance to develop synthesis methods focused on the precise control of particle size, morphology, and chemical composition. Herein, we present our approaches related with calcium phosphate with careful size and structural control through template guided process. First, HA nanorods were prepared through hydrothermal method. Phosphate ester was used as the structure directing agent. After hydrothermal treatment, calcium phosphate rods were obtained with well controlled particle size and porosity. Second, sodium salt carboxymethyl cellulose (CMC) was used as the template to guide the formation and assembly of HA nanoparticles. The composites contain nanosized hydroxyapatite with structural features close to those of biological apatites. These composites with special structural features might be attractive for bone tissue engineering applications. Calcium phosphates comprise a large family of compounds with important biological applications, including osteologic implant coatings, grafts, scaffolds and bone cavity fillings, and vehicles for drug, protein and gene delivery, due to its similarity with the mineral constituents of human bones and teeth. Properties of calcium phosphate, including bioactivity, biocompatibility, solubility, mechanical properties and absorption can be tailored over wide ranges by controlling the particle composition, size, morphology and assembly. For these reasons, it is of great importance to develop synthesis methods focused on the precise control of particle size, morphology, and chemical composition. Herein, we present our approaches related with calcium phosphate with careful size and structural control through template guided process. First, HA nanorods were prepared through hydrothermal method. Phosphate ester was used as the structure directing agent. After hydrothermal treatment, calcium phosphate rods were obtained with well controlled particle size and porosity. Second, sodium salt carboxymethyl cellulose (CMC) was used as the template to guide the formation and assembly of HA nanoparticles. The composites contain nanosized hydroxyapatite with structural features close to those of biological apatites. These composites with special structural features might be attractive for bone tissue engineering applications.

Development of a Novel Multiple Cross-Linking Spiral Amplification for Rapid and Sensitive Detection of HPV16 DNA

( Donghong Zhang ),( Dongliang Liu ),( Bing Liu ),( Xiulan Ma ) 한국미생물생명공학회(구 한국산업미생물학회) 2021 Journal of microbiology and biotechnology Vol.31 No.4

There has been increasing interest in the head and neck squamous cell carcinoma (HNSCC) that is caused by high-risk human papillomavirus (HR-HPV) and has posed a significant challenge to Otolaryngologists. A rapid, sensitive, and reliable method is required for the detection of HR-HPV in clinical specimens to prevent and treat HPV-induced diseases. In this study, a multiple cross-linking spiral amplification (MCLSA) assay was developed for the visual detection of HPV-16. In the MCLSA assay, samples were incubated under optimized conditions at 62°C for 45 min, and after mixing with the SYBR Green I (SGI) dye, the positive amplicons showed bright green fluorescence while the negative amplicons exhibited no obvious change. The specificity test revealed that the developed MCLSA technique had high specificity and could effectively distinguish all five HPV-16 strains from other pathogenic microorganisms. In terms of analytical sensitivity, the limit of detection (LoD) of MCLSA assay was approximately 5.4 × 10¹ copies/tube, which was 10-fold more sensitive than loopmediated isothermal amplification (LAMP) and RT-PCR. The detection results of laryngeal cancer specimens collected from 46 patients with suspected HPV infection in the Liaoning region demonstrated that the positive detection rates of MCLSA and hybridized capture 2 kit were 32.61% (15/46). The true positive rate of the MCLSA assay was higher than that of RT-PCR (100% vs. 93.33%) and LAMP (100% vs. 86.67%). Therefore, the MCLSA assay developed in the present study could be a potentially useful tool for the point-of-care (PoC) diagnosis of HR-HPV, especially in resourcelimited countries.

Statistical evaluation method for cylindricity deviation using local least squares cylinder

Peng Zheng,Dongliang Liu,Fengxia Zhao,Linna Zhang 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.20 No.8

Accurately evaluating cylindricity deviation is the most important requirement for the quality analysis and control of cylindrical products in modern industrial manufacturing processes. The cylindricity deviation of a whole cylinder is usually evaluated with measured points from the target surface. In practice, there are many local intrinsic characteristics that can be related to defects or manufacturing errors, and some precision cylindrical workpieces such as large bearings and rollers are very sensitive to the local cylindricity quality. Hence, it is necessary to evaluate and analyze the local cylindricity variation. In previous works, few methods have focused on the deviation evaluation of local patches of the measured workpieces, and variation of local characteristics could not be directly reflected. In this paper, we propose a new statistical evaluation method for cylindricity deviation using local least squares reference cylinder, which not only evaluates the local and global cylindricity deviations, but also presents deviation change features. This paper illustrates the theoretical basis of the statistical evaluation method, provides the evaluation operation process and parameters, and finally demonstrates the accuracy and feasibility of the proposed method according to the experimental results. The proposed method can be effectively used to provide a reliable verification of the product quality and to analyze the error sources in manufacturing and inspection phases.