Detection of Strawberry Mottle Virus by RT-PCR

Hongyi Yang,Zhihong Zhang,Hongyan Dai,He Li 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

Hydrophobic Waterborne Epoxy Coating Modified by Low Concentrations of Fluorinated Reactive Modifier

Hongyi Shi,Weiqu Liu,Maiping Yang,Xinsheng Liu,Yankun Xie,Zhengfang Wang 한국고분자학회 2019 Macromolecular Research Vol.27 No.4

Fluorinated (meth) acrylate oligomer modified epoxy resin (PHFBMA-DGEBA) and polyether-modified epoxy resin (MPEG-DGEBA) were successfully synthesized and used as reactive modifier and emulsifier for epoxy resins, respectively. GPC, FTIR and 1H NMR were employed to verify the synthesis. The influence of both the concentration and the molecular weight of PHFBMA-DGEBA on the properties of waterborne epoxy resin coatings was investigated. Surface energy and surface composition were probed by contact angle measurements and X-ray photoelectron spectroscopy (XPS), which strongly confirmed the enrichment of fluorinate atoms on the surface. The surface energy of waterborne epoxy coating was decreased from 44.46 mN/m to 23.20 mN/m by adding just 0.09 wt% PHFBMADGEBA- 2, indicating its high effectiveness in improving the surface hydrophobicity. Moreover, the physical properties of waterborne epoxy coatings prepared with different concentration and molecular weight of fluorinated reactive modifier, such as water absorption, Shore D hardness, adhesion, thermal properties and optical transmittance, were also analyzed in detail. Taken together, the waterborne epoxy coatings prepared with low concentrations of reactive modifier are economical and have great potential in large scale industry applications.

Interference Cancellation for Relay-Assisted D2D Communication

( Hongyi Zhao ),( Yang Cao ),( Yingzhuang Liu ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.9

Relay-assisted D2D communication extends the communication range of the D2D pairs and helps users to form D2D pairs effectively. However, due to the introduction of the multi-hop relaying, the D2D communication has to occupy extra transmission time, which may decrease the efficiency of the communication system. In this paper, we propose a scheme to make node receive D2D signal and BS signal at overlapping time to improve the spectrum efficiency according to ZigZag decoding and successive-interference-cancellation (SIC). In this way, more data can be delivered during the same duration, thus the network throughput can be further improved. Numerical results verify the performance improvement of the proposed scheme when compared with a baseline scheme. Moreover, we expand the proposed scheme from one-hop relay scenario to multi-hop relay scenario.

A Slot Allocated Blocking Anti-Collision Algorithm for RFID Tag Identification

( Yang Qing ),( Li Jiancheng ),( Wang Hongyi ),( Zeng Xianghua ),( Zheng Liming ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.6

In many Radio Frequency Identification (RFID) applications, the reader recognizes the tags within its scope repeatedly. For these applications, some algorithms such as the adaptive query splitting algorithm (AQS) and the novel semi-blocking AQS (SBA) were proposed. In these algorithms, a staying tag retransmits its ID to the reader to be identified, even though the ID of the tag is stored in the reader`s memory. When the length of tag ID is long, the reader consumes a long time to identify the staying tags. To overcome this deficiency, we propose a slot allocated blocking anti-collision algorithm (SABA). In SABA, the reader assigns a unique slot to each tag in its range by using a slot allocation mechanism. Based on the allocated slot, each staying tag only replies a short data to the reader in the identification process. As a result, the amount of data transmitted by the staying tags is reduced greatly and the identification rate of the reader is improved effectively. The identification rate and the data amount transmitted by tags of SABA are analyzed theoretically and verified by various simulations. The simulation and analysis results show that the performance of SABA is superior to the existing algorithms significantly.

A Versatile Method to Construct Superhydrophobic Fabrics with Good Durability and Self-cleaning Performance

Maiping Yang,WeiQu Liu,Liyan Liang,Chi Jiang,Yankun Xie,Hongyi Shi,Fengyuan Zhang,Ke Pi 한국섬유공학회 2020 Fibers and polymers Vol.21 No.8

In this paper, various fabrics with good self-cleaning performance were prepared via a facile dip-coating method. The fabrics composed with different fibers and woven techniques were firstly immersed in ZnO sol to increase the surfaceroughness, then dip-coated in fluoroalkylsilane (HFT) solution to reduce the surface energy. The coated fabric showedexcellent superhydrophobicity with a water contact angle (WCA) of 157.8 o and water shedding angle (WSA) of 5 o. Themorphologies and chemical compositions of prepared fabrics were observed with SEM, XPS and EDS. The obtained fabrickept stable water-repelling property in acidic and alkaline solutions, solvents and UV irradiation. Benefited from its high antiwaterability and photocatalysis function of ZnO, the coated fabric demonstrated excellent self-cleaning performance. Thisversatile approach of constructing superhydrophobic fabrics is attractive and could be large-scaled employed in industrialproduction process.

The Relationship between Servitization Improvements and Business Performance of Manufacturing Companies : A Strategic Fit Perspective

Yong Jia,Yezhuang Tian,Yang Yang,Hongyi Sun,Shahab Alam Malik 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.5

Though servitization is hot in theory and practice, empirical research on the relationship between servitization and business performance is limited. Furthermore, existing empirical studies yield mixed results which constrains the development of servitization. Different from most servitization researches focusing on the service business, this empirical research, based on an international large-scale survey database-International Manufacturing Strategy Survey (IMSS), investigates the servitization improvements from the strategic fit perspective. “Service extension, service skill improvement and product design modification”, three improvement actions directly related to service business, are investigated. The results show that the strategic fit of “service extension” and “service skill improvement” significantly influence the business performance. The findings highlight the importance of the strategic fit of servitization improvements, reveal the conditions when servitization will enhance the business performance, and offer guidelines on the implementation of servitization.

Electromagnetic Counter-recoil Mechanism Based on Adaptive Sliding Mode Control

Wenbin Yu,Guolai Yang,Liqun Wang,Lei Li,Hongyi Zhang 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.9

Traditional counter-recoil machines always have problems of difficulty in adjusting the movement process flexibly, maintenance difficulties, and so on. To end these, this paper proposes a new electromagnetic counterrecoil scheme using cylindrical linear motors. Firstly, the mathematical expression of counter-recoil movement under the linear motor is formulated, and the ideal movement trajectory is designed using the piecewise polynomial of velocity based on acceleration. To obtain a better performance, of the motor controller, a composed approach of an adaptive sliding mode control based on barrier function (BFASMC) and the finite-time disturbance observer (FTDO) is introduced into the modeling and computation. The stability of the controller is proved by establishing the Lyapunov function. The new adaptive laws based on the barrier function effectively make up for the shortcomings of the exponential function and improves control chattering. At last, the new scheme is simulated. The results show that it has a strong robustness and anti-interference ability.

Cascaded controllable source circuit and control of electromagnetic transmitters for deep sea exploration

Haijun Tao,Naitong Yang,Hongyi Wang 전력전자학회 2024 JOURNAL OF POWER ELECTRONICS Vol.24 No.2

The electromagnetic detection method is the main method of marine oil and gas resource exploration, and the marine electromagnetic transmitter is the key equipment of marine electromagnetic detection systems. At present, the power factor of the controllable source circuit of the electromagnetic transmitter is low, energy cannot be fed back, and the capacitance of the filter capacitor is large, which results in a large volume of the electromagnetic transmitter and high maintenance costs. Thus, a cascaded H-bridge controllable source circuit combined with active power decoupling technology is introduced in this paper. First, the topological structure and working principle of the controllable source circuit of the electromagnetic transmitter are analyzed, and an improvement plan is proposed for the existing problems of the controllable source circuit. Second, the working principle of the improved controllable source circuit is analyzed, and the advantages of the improved scheme are expounded. Then a control strategy based on linear active disturbance rejection control (ADRC) is proposed, and a linear ADRC controller is designed. Simulation results show that the improved controllable source circuit reduces thecapacitance value, improves the power factor, reduces the volume of the underwater towing body, and reduces the maintenance cost of the system. The proposed control strategy makes the DC voltage have better anti-disturbance performance, and improves the reliability of the electromagnetic transmitter in deep sea exploration.

Preparation and Investigation of Reinforced PVP Blend Membranes for High Temperature Polymer Electrolyte Membranes

Xiaorui Ren,Huanhuan Li,Ke Liu,Hongyi Lu,Jingshuai Yang,Ronghuan He 한국섬유공학회 2018 Fibers and polymers Vol.19 No.12

Poly(vinylpyrrolidone) (PVP), as the low-cost and commercial material, exhibits superior phosphoric acid doping capability due to the presence of heterocycle and carbonyl groups in the repeat unit. However, it can’t be used as the high temperature polymer electrolyte membrane (HT-PEM) alone because of its significant hydrophilicity and poor mechanical stability. In the present work, polyethersulfone (PES), polysulfone (PSU), polyetherketone-cardo (PEK-c), polyvinylidene fluoride (PVDF) and poly(vinylidene fluoride-co-hexafluoropropylene) (PHFP), five kinds of engineering thermoplastics with excellent mechanical properties and chemical inertness, are chosen to prepare a series of PVP blend membranes by the polymer blending method in order to enhance the dimensional and mechanical stabilities of PVP based membranes. The influence of structures of enhanced polymers on properties of HT-PEMs was investigated systematically. PVP blend membranes with aromatic polymers (i.e. PES, PSU and PEK-c) exhibited decreased volume swellings, increased acid doping contents, superior conductivities and improved mechanical strengths, which determined that they are more suitable for electrolytes of fuel cell applications comparing with PVP/PVDF and PVP/PHFP membranes blended with aliphatic polymers.