Effect of Laminated Structure on the Mechanical Properties of Reclaimed Bamboo Chopsticks-Wood Veneer Hybrid Laminated Composite

Haiying Zhou,Xin Wei,Fuming Chen,Ge Wang,Lee M. Smith 한국섬유공학회 2019 Fibers and polymers Vol.20 No.7

The waste created by disposable bamboo chopsticks used in dine in restaurants, fast food, and takeaway has anincreasingly enormous impact. The object of this study was to investigate the effect of the type of laminate structure on themechanical properties of a novel type of biodegradable bamboo-wood hybrid composite processed from the reclaimedbamboo chopsticks and wood veneer hybrid laminate composite (BWHC). Four types of laminate structures were chosen forcomparison namely: bamboo chopsticks parallel laminate (Type I), bamboo chopsticks cross-laminate (Type II), bamboochopsticks-wood veneer parallel laminate (Type III), and bamboo chopsticks-wood veneer cross-laminate (Type IV). Theresults revealed that the modulus of rupture MOR of Type I>Type III>Type IV>Type II. The optimum bonding strength forBWHC was displayed by the structural Type III, followed by Types I, IV and II. The horizontal wood veneers layer betweenthe bamboo chopsticks layers effectively improve the bonding strength of BWHC which was confirmed by SEM observation. The dynamic mechanical properties of BWHC were examined by performing low velocity impact loading tests. The impactperformance of BWHC was significantly greater in the samples designed with a cross-laminate structure. Mixed failuremodels for the BWHC under the impact test were found, including debonding, delamination, fiber tensile fracture, andstructural collapse. Structural collapse was main failure model of BWHC with a cross hybrid lamination and their values ofthe total energy absorbed was far greater than BWHC with parallel laminate. This study suggest that bamboo-wood hybridcomposite with low cost, biodegradability, and excellent physical and mechanical properties can be manufactured by therecycling utilization and structural design.

Advances in the Development of Anti-Adhesive Biomaterials for Tendon Repair Treatment

Zhou Haiying,Lu Hui 한국조직공학과 재생의학회 2021 조직공학과 재생의학 Vol.18 No.1

Peritendinous adhesion that simultaneous with tendon healing link the healing tendon to the surrounding tissue. It results in functional disability, and has a significant adverse impact on health as well as social and economic development.Based on a search in the PubMed and Web of Science database, the research articles were screened by their time, main idea, impact factor index, while the ones with no credibility were excluded. Afterwards, we go through the analysis of the reliability and characteristics of the results were further screened from selected articles.A total of 17 biomaterials used to evaluate the adhesion mechanism and the properties of the material were found. All of these biomaterials contained randomized controlled studies and detailed descriptions of surgical treatment that support the reliability of their results which indicates that biomaterials act as barriers to prevent the formation of adhesion, and most of them exhibit satisfactory biocompatibility, biodegradability or selective permeability. Moreover, a few had certain mechanical strength, anti-inflammatory, or carrier capacities. However, there still existed some defects, such as time, technology, clinical trials, material targeting and different measurement standards which also lowered the reliability of their results.In future, anti-adhesion biomaterials should focus on affordable raw materials with wide sources, and the production process should be simplified, in this way, the versatility and targeting of materials will be improved.

Research on the Electric Vehicle Control System

Haiying Wang,Tianjun Sun,Xingbo Zhou,Qi Fan 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.8

With the development of electric vehicle electronic control unit (ECU) for vehicle control technology and the key to raise the level of design electric vehicles the optimization control of the vehicle performance as direction. In order to achieve the rational, coordination of vehicles within the system of integrated control, based on the modular thought, through constructing the distributed control network design overall structure of the control system of pure electric vehicle, the vehicle controller is analyzed on the working principle and its function realization degree, as a pure electric vehicle control system provides the theory basis for performance evaluation.

A Transportation Problem with Uncertain Costs and Random Supplies

Haiying GUO,Xiaosheng WANG,Shaoling ZHOU 국제이네비해양경제학회 2015 International Journal of e-Navigation and Maritime Vol.2 No.1

Transportation problem is an optimization problem. In general, it was studied under random or uncertain condition. Considering the recent complexity, it is not enough to make should be a perfect transportation plan only based on. Usually, there is not only uncertainty but also randomness in many systems. In this paper, the aim is to investigate a transportation problem under uncertain and random environment. As a result, a conceptual uncertain random model is proposed for the problem, where the supplies are considered as random variables, and the costs and the demands are uncertain variables. By minimizing the expected value of uncertain objective function and taking confidence levels on constraints, transforming the model into a crisp mathematical form is the main conclusion. By minimizing the expected value of uncertain objective function and taking confidence levels on constraints, the above model can be turned to a mathematical form. Then transforming the model into a typical mathematical programming model is the main conclusion by using uncertainty theory and probability theory. At the end, a numerical example is given to show the feasibility of the model.

Structure and magnetic properties of CrN thin films on La0.67Sr0.33MnO3

Zhongpo Zhou,Dingbo Zhang,Haiying Wang,Tianxing Wang,Zhansheng Lu,Zongxian Yang,Zhiwei Ai,Hao Wu,Chang Liu 한국물리학회 2018 Current Applied Physics Vol.18 No.11

High crystalline quality CrN thin films have been grown on La0.67Sr0.33MnO3 (LSMO) templates by molecular beam epitaxy. The structure and magnetic properties of CrN/LSMO heterojunctions are investigated combining with the experiments and the first-principles simulation. The Nėel temperature of the CrN/LSMO samples is found to be 281 K and the saturation magnetization of CrN/LSMO increases compared to that of LSMO templates. The magnetic property of CrN/LSMO heterostructures mainly comes from Cr atoms of (001) CrN and Mn atoms of (001) LSMO. The (001) LSMO induces and couples the spin of the CrN sublattice at CrN/LSMO interface.

Research in Equalizing Charging Control Strategy in Li-ion Power Battery

Bo Wu,Hang Liu,Haiying Wang,Zongru Zhou,Qi Fan 보안공학연구지원센터 2013 International Journal of Control and Automation Vol.6 No.2

Analysis of the running quality and road friendliness of the virtual track train in multiple running stages between stations

Chengping Wang,Jimin Zhang,Hechao Zhou,Haiying Lu 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.2

A virtual track train runs at fixed stations on designated lines. The short distance between stations requires frequent traction, uniform and braking, which will have a serious impact on vehicle performance and road life. A three-dimensional dynamics model of the virtual track train comprising three vehicles was established based on the theory of vehicle dynamics, tire dynamics, and nonlinear dynamics. The dynamics model comprised vehicle model and tireroad model, considering the dynamic coupling between vehicles and tire-road dynamic interaction. The field dynamic acceleration test of the actual virtual track train was used to validate the developed dynamics model. The running quality and road friendliness of the virtual track train in multiple running stages between stations were evaluated by theoretical analysis and numerical calculation. The results indicated that the running quality in the traction stage and braking stage is smaller than that in the uniform stage. The road friendliness in the uniform stage is better than that in the traction and braking stage. The increase in running speed and the decrease in road grade both reduce the running quality and road friendliness. The increase in acceleration or deceleration makes the road friendliness worse, and it has less impact on the running quality. The research results provide recommendations for the running mode of the virtual track train to improve the running quality. At the same time, they can provide guidance for asphalt pavement laying to slow down the road damage.

AP2α negatively regulates PDHA1 in cervical cancer cells to promote aggressive features and aerobic glycolysis in vitro and in vivo

Lijie Zhao,Rong Geng,Yi Huang,Jiping Zhang,Haiying Cheng,Cankun Zhou,Yifeng Wang 대한부인종양학회 2023 Journal of Gynecologic Oncology Vol.34 No.5

Objective: As a gate-keeper enzyme link, pyruvate dehydrogenase E1 subunit alpha (PDHA1) functions as a key regulator during glycolysis and the mitochondrial citric acid cycle, which has been reported in several tumors. Nevertheless, the effects of PDHA1 on biological behaviors and metabolism remain unclear in cervical cancer (CC) cells. The study aims to explore the PDHA1 effects on glucose metabolism in CC cells and its possible mechanism. Methods: We first determined the expression levels of PDHA1 and activating protein 2 alpha (AP2α) as a PDHA1 potential transcription factor. The effects of PDHA1 in vivo were evaluated through a subcutaneous xenograft mouse model. Cell Counting Kit-8 assay, 5-ethynyl-2′-deoxyuridine (EdU) labeling assay, Transwell invasion assay, wound healing assay, Terminal deoxynucleotidyl transferase dUTP nick end labeling assay and flow cytometry were performed in CC cells. Oxygen consumption rate (OCR) levels were determined to reflect aerobic glycolysis level in gastric cancer cells. Reactive oxygen species (ROS) level was measured with 2′, 7′-dichlorofluorescein diacetate kit. The relationship between PDHA1 and AP2α was examined by conducting chromatin immunoprecipitation assay and electrophoretic mobility shift assay. Results: In CC tissues and cell lines, PDHA1 was downregulated, while AP2α was upregulated. Overexpression of PDHA1 remarkedly inhibited the proliferation, invasion and migration of CC cells, and tumor growth in vivo, as well as promoted OCR, apoptosis and ROS production. Moreover, AP2α directly bound to PDHA1 within suppressor of cytokine signaling 3 promoter region to negatively regulate PDHA1 expression level. What is more, PDHA1 knockdown could effectively reversed the AP2α silencing-mediated suppressive effects on cell proliferation, invasion, migration, and the promotive effects of AP2α knockdown on OCR, apoptosis and ROS production. Conclusions: Our findings demonstrate that AP2α negatively regulated PDHA1 via binding to PDHA1 gene promoter to promote malignant CC cell behaviors, which may provide a potential approach for CC therapeutics.