An Optimized CLBP Descriptor Based on a Scalable Block Size for Texture Classification

( Jianjun Li ),( Susu Fan ),( Zhihui Wang ),( Haojie Li ),( Chin-chen Chang ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.1

In this paper, we propose an optimized algorithm for texture classification by computing a completed modeling of the local binary pattern (CLBP) instead of the traditional LBP of a scalable block size in an image. First, we show that the CLBP descriptor is a better representative than LBP by extracting more information from an image. Second, the CLBP features of scalable block size of an image has an adaptive capability in representing both gross and detailed features of an image and thus it is suitable for image texture classification. This paper successfully implements a machine learning scheme by applying the CLBP features of a scalable size to the Support Vector Machine (SVM) classifier. The proposed scheme has been evaluated on Outex and CUReT databases, and the evaluation result shows that the proposed approach achieves an improved recognition rate compared to the previous research results.

Investigating the miscibility of poly (butylene adipate-co-terephthalate)/poly (lactic acid) mixtures through multi-scale simulation and experiments

Xuezhi Li,Yuanyuan Qin,Haojie Li,Guangjun Liu,Junyu Fu,Feng Li,Zhanchun Chen 한국고분자학회 2023 Macromolecular Research Vol.31 No.9

The processability and practical applications of poly (butylene adipate-co-terephthalate) (PBAT) /poly (lactic acid) (PLA) blends are limited due to their lower miscibility. To investigate the miscibility of various PBAT/PLA composite ratios and the mechanism of miscibility between them, PBAT/PLA blends with different ratios were prepared using the melt mixing method. A combination of multi-scale simulations and experiments were employed to investigate the miscibility of the composites. Molecular dynamics simulations analyzed PBAT/PLA mixtures that are incompatible and showed the molecular basis of their incompatibility through the radial distribution function (RDF). The degree of miscibility of different ratios of PBAT/PLA composites was described using the Flory–Huggins interaction parameter, indicating that the 50/50 PBAT/PLA blend has the worst miscibility. Mesoscopic dynamics described the mesoscopic morphology of PBAT and PLA blends visually. The results obtained from the simulations were consistent with scanning electron microscope (SEM) and differential scanning calorimeter (DSC) experiments, indicating the simulations' reliability. This work provides a molecular perspective on the mechanism of thermodynamic insolubility of PBAT and PLA, which can inspire future PBAT/PLA hybrid modifications.

Design and analysis of fiber placement for composite conical shell

Haojie Xu,Jiuru Lu,Kangmei Li,Jun Hu 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.3

Composite conical shells have a wide range of applications. The 3D printing technology based on FDM constrains the fibers in a plane and it is difficult to fill the fibers in the thin wall. This paper proposes a rapid prototyping method for composite materials based on curved surface fiber placement. The conical shell is divided into a series of equidistant offset surfaces. Then we designed three initial paths for fiber placement and rotated them to cover the surface of the conical shell. The resin paths are designed for filling the border layers and the gaps between the fibers. The placement process is simulated by MATLAB (R2016b) and we analyzed the parameter range, direction angle, curvature and fiber content of the three paths. When the critical parameters 0 ϕ = [0°, 42°], ξ is equal to any value and C = (0, 0.032], the corresponding initial path can reach the top of the cone shell in this study. The direction of the constant curvature curve can be designed best; when C = 0.032, the direction angle range is -90 to 90. The curvature of the geodesic path is the smallest; when 0 ϕ = 10°, the normal curvature is about 0.0001 and the geodesic curvature is equal to 0. The fiber content of the geodesic path is greatly affected by the parameter 0 ϕ , and the difference can reach 40 %. The fiber content of the linear curve is greater than 90 %. When ξ is equal to 4, the fiber content is 95 %. For the constant curvature curve, the fiber content is generally very low, about 20 %. We used a six-axis robot and a spindle to produce composite conical shell. The results show that the present design method for composite conical shell is reliable and is able to provide a useful reference for design and production of composite conical shell.

Response of angle-ply laminated cylindrical shells with surface bonded piezoelectric layers

Haojie Wang,Wei Yan,Chunyang Li 국제구조공학회 2020 Structural Engineering and Mechanics, An Int'l Jou Vol.76 No.5

A state-space method is developed to investigate the time-dependent behaviors of an angle-ply cylindrical shell in cylindrical bending with surface-bonded piezoelectric layers. Both the interfacial diffusion and sliding are considered to describe the properties of the imperfect interfaces. Particularly, a matrix reduction technique is adopted to establish the transfer relations between the elastic and piezoelectric layers of the laminated shell. Very different from our previous paper, in which an approximate numerical technique, i.e. power series expansion method, is used to deal with the time-dependent problems, the exact solutions are derived in the present analysis based on the piezoelasticity equations without any assumptions. Numerical results are finally obtained and the effects of imperfect interfaces on the electro-mechanical responses of the laminated shell are discussed.

Cross-Linked Poly(cyclotriphosphazene-co-phloretin) Microspheres and Their Application for Controlled Drug Delivery

Sahid Mehmood,Haojie Yu,Li Wang,Md Alim Uddin,Bilal Ul Amin,Fazal Haq,Shah Fahad,Muhammad Haroon 한국고분자학회 2022 Macromolecular Research Vol.30 No.9

In this work, cross-linked poly(cyclotriphosphazene-co-phloretin) (PCTPPT) microspheres were synthesized and characterized by Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscope (SEM). In FT-IR spectra, the new appeared bands at 1009 cm-1 and 1132 cm-1 confirmed the successful polymerization between hexachlorocyclotriphosphazene (HCCP) and phloretin (Pht). While the SEM results showed that the size of the microspheres was strongly dependent on the HCCP:Pht mole ratio. The crystalline nature of the PCTPPT microspheres was checked by X-ray diffraction (XRD) and provided evidence for the successful preparation of the microspheres. The thermal stability of the PCTPPT microspheres was investigated by thermogravimetric analysis (TGA). The obtained TGA results showed that the increase in thermal stability was attributed to the highly cross-linked covalently bonded structure of PCTPPT microspheres. The particle size distribution was determined by dynamic light scattering (DLS) and the results showed that the decreased HCCP:Pht mole ratio increases the size of the microspheres. The PCTPPT-3 microspheres were used as drug carriers for a model drug camptothecin (CPT). The experimental findings showed a cumulative release of 41.0% in pH 4.0 and 32.6% in pH 7.4 after 350 h and the PCTPPT-3/CPT microspheres have good drug loading capability and controlled release property for CPT.

An encoder-decoder framework for predicting jaywalker-vehicle conflicts

Ziqian Zhang,Haojie Li 대한교통학회 2023 대한교통학회 학술대회지 Vol.89 No.-

Synthesis of carboxymethyl starch grafted polyvinyl imidazole (CMS-g-PVIs) and their role as an absorbent for the removal of phenol

Fazal Haq,Haojie Yu,Li Wang,Lisong Teng,Sahid Mehmood,Muhammad Haroon,Bilal-Ul-Amin,Shah Fahad,Md Alim Uddin,Di Shen 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.5

Cigarette industry plays an important role in the economy of the advanced countries. But the cigarette smoke contains toxic chemicals such as phenol which causes various kind of diseases and affect human life. In this paper, we synthesized carboxymethyl starch grafted poly vinyl imidazole (CMS-g-PVIs) by reacting carboxymehtyl starch (CMS) with vinyl imidazole (VI). The structures of the CMS-g-PVIs were investigated by 1H NMR and FT-IR. The crystalline properties of the CMS and CMS-g-PVIs were checked by XRD. The thermal properties of the original CMS and CMS-g-PVIs were investigated by TGA analysis. It was found that the modified starches had high thermal stability due to aromatic imidazole ring. The modified starches also showed more rough and distorted morphology as compared to native CMS. The CMS-g-PVIs were subjected for phenol adsorption and showed adsorption efficiencies of 0.170 g/g, 0.190 g/g, 0.192 g/g and 0.199 g/g for CMS, CMS-g-PVI 1, CMS-g-PVI 2 and CMS-g-PVI 3, respectively. Due to higher grafting ratio, CMS-g-PVI 3 showed good adsorption efficiency of 0.199 g/g for phenol. The obtained results showed that the grafting of vinyl imidazole on CMS can increase the adsorption efficiency of native CMS towards phenol.

An encoder-decoder framework for predicting jaywalker-vehicle conflicts

Ziqian Zhang,Haojie Li 대한교통학회 2023 대한교통학회 학술대회지 Vol.89 No.-

Camera Source Identification of Digital Images Based on Sample Selection

( Zhihui Wang ),( Hong Wang ),( Haojie Li ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.7

With the advent of the Information Age, the source identification of digital images, as a part of digital image forensics, has attracted increasing attention. Therefore, an effective technique to identify the source of digital images is urgently needed at this stage. In this paper, first, we study and implement some previous work on image source identification based on sensor pattern noise, such as the Lukas method, principal component analysis method and the random subspace method. Second, to extract a purer sensor pattern noise, we propose a sample selection method to improve the random subspace method. By analyzing the image texture feature, we select a patch with less complexity to extract more reliable sensor pattern noise, which improves the accuracy of identification. Finally, experiment results reveal that the proposed sample selection method can extract a purer sensor pattern noise, which further improves the accuracy of image source identification. At the same time, this approach is less complicated than the deep learning models and is close to the most advanced performance.

Structurally ordered nanofiltration membranes prepared by spatially anchoring interfacial polymerization for highly efficient separation properties

Ao Sheng,Hao Wang,Haoji Jiang,Yaxin Zhao,Hao Li,Hao Jia,Zhong Wei,Heyun Wang 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.9

The incorporation of various nanofillers into the interfacial polymerization (IP) process is widely applied to prepare higher performance NF membranes. However, few studies have reported the influence of nanofillers on nanocomposite membrane formation in the IP process. Here, an optical microscope was employed to study the change rule in the 8-NH2-POSS/PSA nanocomposite membrane formation process due to the addition of 8-NH2-POSS nanoparticles. First, the addition of 8-NH2-POSS reduced the diffusion rate of the polyacrylamide hydrochloride (PAH) water phase on the surface against the oil phase because of the interaction with the PAH molecules. Furthermore, the 8-NH2- POSS/PSA nanocomposite membrane structure was more homogeneous and exhibited uniform pinhole defects distribution due to the interaction of the 8-NH2-POSS nanoparticles to the PAH segment. A significant separation performance was observed in the 8-NH2-POSS/PSA nanocomposite membrane due to the hydrophilicity and positive charge of the 8-NH2-POSS nanoparticles. The permeation flux and MgCl2 rejection of the 8-NH2-POSS/PSA nanocomposite membrane increased up to 50.5 L/m2 h at 0.5MPa and 94.8%, respectively, which corresponded to increases of 73.5% and 8.7% as compared to the pristine PSA membrane. 8-NH2-POSS/PSA nanocomposite membranes have great application potential in the water softening and treatment of divalent metals ions under acidic conditions.