Active Speed Control of Belt Conveyor with Variable Speed Interval Based on Fuzzy Algorithm

Zhou Qixun,Gong Hao,Sun Wenhao,Yan Qi,Shi Keke,Du Guanghui 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.3

Aiming at the problems of too fast adjustment frequency, unstable material flling rate and fuctuation of material fow at the boundary of speed interval caused by unreasonable setting of speed interval in traditional active speed control strategy based on hierarchical speed regulation. An active speed control strategy based on fuzzy algorithm is proposed for belt conveyor. The material flling rate of the belt is taken as input, and the double-layer fuzzy boundary is set according to the expected value of the material flling rate to adjust the speed of the belt conveyor. The adjustment time of diferent speed intervals is given according to the estimation-calculation-optimization method. The simulation results of the double belt conveyor system show that compared with the active speed control strategy based on hierarchical speed regulation, the active speed control strategy can not only stabilize the material flling rate of the downstream belt conveyor near the expected value and improve the stability of transportation, but also reduce the energy by about 20.69% per hour on average. The subsequent experimental results also verify the efectiveness of the proposed active speed control strategy, which can achieve more sustainable operation of the belt conveyor.

Comparison of organic acids supplementation on the growth performance, intestinal characteristics and morphology, and cecal microflora in broilers fed corn-soybean meal diet

Sun, Hao Yang,Zhou, Hong Bin,Liu, Yang,Wang, Yue,Zhao, Cheng,Xu, Liang Mei Asian Australasian Association of Animal Productio 2022 Animal Bioscience Vol.35 No.11

Objective: The aim of this study was to compare the effects of three kinds of organic acid (OA) products on the growth performance, intestinal characteristics and morphology, and cecal microflora in broilers fed a corn-soybean meal meal diet. Methods: A total of 420 one-day-old male Cobb 500 broilers with an average initial body weight of 49.11±1.02 g were used in this 42-day experiment. Birds were randomly allotted to one of five treatments (7 replicates with 12 birds per replicate). Treatments consisted of negative control (NC), basal diet; positive control (PC), basal diet+100 mg/kg of Aviramycin; OA1, basal diet+500 mg/kg of OA product 1; OA2, basal diet+1,000 mg/kg of OA product 2; and OA3, basal diet+1,200 mg/kg of OA product 3. Results: The results indicated that OA product addition had no effect on growth performance parameters, such as body weight gain, feed intake, and feed conversion ratio, from days 1 to 14, 15 to 28, and 0 to 42, or on the pH values of the intestine, intestinal weight, or intestinal weight to body weight ratio. The intestinal morphology in terms of villus height and crypt depth were affected by dietary supplementation of OA products, respectively. Furthermore, dietary addition of OAs had positive influences on the maintenance of the cecal microflora based on the results of 16S rRNA analysis. Conclusion: Dietary inclusion of three kinds of OA products all benefit broilers, but the mode of action may be different. This study provides a basis for the application of OA products used in the poultry industry.

Ternary Phase Diagram-Facilitated Rapid Screening of Double Perovskites As Electrocatalysts for the Oxygen Evolution Reaction

Sun, Hainan,Hu, Zhiwei,Xu, Xiaomin,He, Juan,Dai, Jie,Lin, Hong-Ji,Chan, Ting-Shan,Chen, Chien-Te,Tjeng, Liu Hao,Zhou, Wei,Shao, Zongping American Chemical Society 2019 Chemistry of materials Vol.31 No.15

<P>The development of cost-effective, non-noble metal electrocatalysts for the oxygen evolution reaction (OER) is of paramount importance for sustainable technologies. Efficient screening strategies for electrocatalysts can greatly increase the commercialization speed of these advanced technologies. Here, ternary phase diagrams with large-scale tuning and designated-scale tuning strategies are applied for the first time to provide a new method for screening perovskite oxide-based electrocatalysts for OERs. Specifically, the family of double perovskites (Sr<SUB>2</SUB>Fe<SUB>1.5-<I>x</I>-<I>y</I></SUB>Co<SUB><I>x</I></SUB>Ni<SUB><I>y</I></SUB>Mo<SUB>0.5</SUB>O<SUB>6−δ</SUB>, 0 ≤ <I>x</I>, <I>y</I> ≤ 1.5) was utilized to understand the role of transition metals in perovskite oxides. Ternary phase diagrams can facilitate a rapid screening process, provide a straightforward relationship between phase structures and catalytic activities, and help to confirm the effects of various combinations of transition metals on the OER activity. The Fe-Co system (Sr<SUB>2</SUB>Fe<SUB>1.5-<I>x</I></SUB>Co<SUB><I>x</I></SUB>Mo<SUB>0.5</SUB>O<SUB>6−δ</SUB>) improves the catalytic activities, as demonstrated by the reduced Tafel slope and enhanced stability, while the Fe-Ni system (Sr<SUB>2</SUB>Fe<SUB>1.5-<I>y</I></SUB>Ni<SUB><I>y</I></SUB>Mo<SUB>0.5</SUB>O<SUB>6−δ</SUB>) improves the surface kinetic properties of the OER, as demonstrated by its reduced overpotential. Significantly, the Co, Ni, and Fe ternary phase systems can serve as the synergistic coactive sites (Sr<SUB>2</SUB>Fe<SUB>1.5-<I>x</I>-<I>y</I></SUB>Co<SUB><I>x</I></SUB>Ni<SUB><I>y</I></SUB>Mo<SUB>0.5</SUB>O<SUB>6−δ</SUB>) to catalyze the OER, resulting in an improved overall OER performance. This systematic study not only demonstrates a new strategy to allow the rapid screening of double perovskite OER catalysts based on large-scale tuning and designated-scale tuning strategies but, more importantly, also provides an insightful understanding of the use of multitransition metal-based double perovskites for catalysis of the OER.</P> [FIG OMISSION]</BR>

Boosting the oxygen evolution reaction activity of a perovskite through introducing multi-element synergy and building an ordered structure

Sun, Hainan,Xu, Xiaomin,Hu, Zhiwei,Tjeng, Liu Hao,Zhao, Jie,Zhang, Qin,Lin, Hong-Ji,Chen, Chien-Te,Chan, Ting-Shan,Zhou, Wei,Shao, Zongping The Royal Society of Chemistry 2019 Journal of Materials Chemistry A Vol.7 No.16

<P>If different active sites in a catalyst have optimal binding to different reaction intermediates and short reaction paths among them, they may work cooperatively to enhance the oxygen evolution reaction (OER) activity. Based on this design principle, in this study, we start with a B-site ordered double perovskite Sr2FeMoO6−δ with poor OER activity as the host material to fulfill the requirement of a short pathway, and then, replace Mo with Ni and Fe with Co to optimize the synergistic interplay of the multi-active sites. Replacing Mo with Ni indeed dramatically enhances the OER activity and structural/operating stability. Further improvement in OER performance is realized by partial substitution of Fe with Co, leading to the development of a material with the nominal composition of Sr2Fe0.8Co0.2Mo0.65Ni0.35O6−δ, which outperforms the noble metal oxide IrO2 and is better than most of the electrocatalysts developed based on a single descriptor, such as Ba0.5Sr0.5Co0.8Fe0.2O3−δ (eg occupancy close to unity), PrBaCo2O5+δ (O 2p-band center relative to the Fermi level), and La0.5Sr0.5CoO3−δ (charge-transfer energy) in many aspects. As a universal method, combined structural and compositional tuning to create a cooperative effect among different active sites for intermediate adsorption and reaction in an ordered structure may provide a new way for the design of superior electrocatalysts for various applications.</P>

Enzymatic Synthesis of Theanine with L-glutamine-Zn(II) Complexes

Hao-Qi Wang,Zhong Yao,Zhi Zhou,Yun Sun,Ping Wei,Ping-Kai Ouyang 한국생물공학회 2012 Biotechnology and Bioprocess Engineering Vol.17 No.6

Theanine, a unique amino acid found in tea plants, has many important physiological functions. Theanine can be enzymatically synthesized via the γ-glutamyltranspeptidation reaction. In this study, we described a new method of theanine synthesis using the L-glutamine-Zn(II)(Zn(Gln)2) complex instead of glutamine as the donor,which successfully reduced the side autotranspeptidation reaction and led to higher yield of theanine. We prepared the Zn(Gln)2 complexes and showed that they are stable in liquid bulk under 9.0 pH. After using the Zn(Gln)2 in the γ-glutamyltranspeptidation reaction, we utilized HPLC and Mass spectrometry analysis to demonstrated that Zn(Gln)2was an more effective γ-glutamyl donor than glutamine. The autotranspeptidation reaction was restrained effectively. As a result, the theanine yield and the conversion rate for glutamine were vastly improved. In a reaction mixture containing 48 mM of Zn(Gln)2, 1.6 M ethylamine, and 0.5 U/mL GGT, the final concentration of theanine obtained was 61.3 mM after incubation at 37oC for three hours. The conversion rate for glutamine was 63.8%, which showed a 16.9% increase as compared to when using glutamine alone as the donor substrate.

Research on Rolling Bearing Fault Diagnosis with Adaptive Frequency Selection based on LabVIEW

Hongxin Zhang,Hao Zhou,Xianjiang Shi,Ju huang,Jixiang Sun,Lei Huang 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.3

Aspartate Transaminase to Platelet Ratio Index (APRI) and Albumin-Bilirubin Grade (ALBI) Predict Postoperative Morbidity Following Hepatectomy for Hepatocellular Carcinoma A Multicenter Cohort Study

( Tian Yang ),( Li-yang Sun ),( Lei Liang ),( Ya-hao Zhou ),( Wei-min Gu ),( Hong Wang ),( Ting-hao Chen ),( Yong-yi Zeng ),( Wan Yee Lau ),( Meng-chao Wu ),( Feng Shen ) 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1

Aims: Postoperative morbidity following hepatectomy remains high, and understanding its risk factors is important to improve perioperative outcomes. We aimed to identify the role of two non-invasive markers - albumin-bilirubin (ALBI) and aspartate transaminase to platelet ratio index (APRI) - in predicting postoperative morbidity following hepatectomy for hepatocellular carcinoma (HCC). Methods: A multicenter data of patients undergoing hepatectomy for HCC at 8 centers were retrospectively analyzed. These patients were divided into normal and high groups according to preoperative ALBI and APRI scores. ALBI and APRI’s predictive accuracy of postoperative 30-day overall and major morbidity were evaluated by the area under the receiver operating characteristic curve (AUC) and compared with two conventional scores: Child-Pugh grade and model for end-stage liver disease (MELD). Results: In 2,301 patients, 866 (37.6%) and 400 (17.4%) were in the high ALBI and APRI groups, respectively. There were significant differences of postoperative overall morbidity between the normal and high ALBI groups (26.2% vs. 40.1%, P<0.001), as well as between the normal and high APRI groups (29.2% vs. 42.4%, P<0.001). The AUCs of the ALBI and APRI scores for predicting overall morbidity are greater than those of Child- Pugh grade and MELD score. Multivariable analyses revealed that ALBI and APRI were independent predictors of overall morbidity in both preoperative and postoperative prediction models. Similar results existed in predicting postoperative major morbidity. Conclusions: Preoperative ALBI and APRI could predict postoperative 30-day overall and major morbidity following hepatectomy for HCC before or after surgery.

Bilibili: Soaring to be China's largest Video Community for Young People

Ting Liu,Yubo Zhou,Huili Chen,Hao Sun,Rocky P. Chen Academy of Asian Business (AAB) 2023 Academy of Asian Business Review Vol.9 No.1

Bilibili, the most popular software in China among young people, deserves further exploration. This report aims to analyze how Bilibili has grown from a small website full of pirate videos to a preferred video community for China's younger generation (under 35 years old) today through community atmosphere building, content ecology maintenance, and understanding the mindset of Generation Z+ (born from 1985 to 2009). There are four main segments in this report. The timeline shows the major events that have shaped Bilibili since its foundation. Second, this report analyzes its four important turning points. Moreover, the success factors exhibit what makes Bilibili stand out from the many short-form video platforms in China. For example, Bilibili grasped the psychology of young people, managed to attract young people, and came out with its differentiation strategy. Finally, this report summarizes the lessons that students and entrepreneurs can learn from Bilibili's success.

Transferrable single-crystal silicon nanomembranes and their application to flexible microwave systems

Jung-Hun Seo,Hao-Chih Yuan,Lei Sun,Weidong Zhou,Zhenqiang Ma 한국정보디스플레이학회 2011 Journal of information display Vol.12 No.2

This paper summarizes the recent fabrication and characterizations of flexible high-speed radio frequency (RF) transistors,PIN-diode single-pole single-throw switches, as well as flexible inductors and capacitors, based on single-crystalline Si nanomembranes transferred on polyethylene terephthalate substrates. Flexible thin-film transistors (TFTs) on plastic substrates have reached RF operation speed with a record cut-off/maximum oscillation frequency (fT/fmax) values of 3.8/12 GHz. PIN diode switches exhibit excellent ON/OFF behaviors at high RF frequencies. Flexible inductors and capacitors compatible with high-speed TFT fabrication show resonance frequencies (fres) up to 9.1 and 13.5 GHz, respectively. Robust mechanical characteristics were also demonstrated with these high-frequency passives components.

Improving Soil-Water Characteristics and Pore Structure of Silty Soil Using Nano-aqueous Polymer Stabilisers

Wei Huang,Cuiying Zhou,Zhen Liu,Hao Sun,Jiaxin Du,Lihai Zhang 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.9

Polymer soil stabilisers have been shown to improve soil strength and erosion resistance, for example on slopes where topsoil can be easily eroded. However, fundamental mechanisms of soil stabilisers in soil enhancement through modifying the soil-water characteristic and microstructure of soil (e.g., distribution of pore size) have not been fully understood. This gap in understanding is not conducive to the subsequent development and engineering applications of soil stabilisers. This paper reports a series of experimental studies on the influence of nano-aqueous adhesive (NAA) in modifying the pore size distribution and water content of the soil. The results show that NAA can change the soil-water characteristic curve and has the potential to increase water retention capacity, which is essential for vegetation growth on a slope. In addition, they indicate that NAA could improve soil microstructure and pore uniformity by blocked small pores. The results also show that the NAA could reduce wilting coefficient, improve air entry value, and thereby protect vegetation, which helps stabilise the slope.