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SVC: Secure VANET-Assisted Remote Healthcare Monitoring System in Disaster Area
( Xuefeng Liu ),( Hanyu Quan ),( Yuqing Zhang ),( Qianqian Zhao ),( Ling Liu ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.3
With the feature of convenience and low cost, remote healthcare monitoring (RHM) has been extensively used in modern disease management to improve the quality of life. Due to the privacy of health data, it is of great importance to implement RHM based on a secure and dependable network. However, the network connectivity of existing RHM systems is unreliable in disaster area because of the unforeseeable damage to the communication infrastructure. To design a secure RHM system in disaster area, this paper presents a Secure VANET-Assisted Remote Healthcare Monitoring System (SVC) by utilizing the unique “store-carry-forward” transmission mode of vehicular ad hoc network (VANET). To improve the network performance, the VANET in SVC is designed to be a two-level network consisting of two kinds of vehicles. Specially, an innovative two-level key management model by mixing certificate-based cryptography and ID-based cryptography is customized to manage the trust of vehicles. In addition, the strong privacy of the health information including context privacy is taken into account in our scheme by combining searchable public-key encryption and broadcast techniques. Finally, comprehensive security and performance analysis demonstrate the scheme is secure and efficient.
Hanyu Zhu,Yuan Yuan,Juan Liu,Liesheng Zheng,Liguo Chen,Aimin Ma 한국미생물학회 2016 The journal of microbiology Vol.54 No.5
To gain insights into dimorphism, cell wall polysaccharides from Tremella fuciformis strains were obtained from alkaliextracted water-soluble fractions PTF-M38 (from the mycelial form), PTF-Y3 and PTF-Y8 (from the yeast form) of T. fuciformis strains were used to gain some insights into dimorphism study. Their chemical properties and structural features were investigated using gel permeation chromatography, gas chromatography, UV and IR spectrophotometry and Congo red binding reactions. The results indicated that the backbones of PTF-M38, PTF-Y3 and PTF-Y8 were configured with α-linkages with average molecular weights of 1.24, 1.08, and 1.19 kDa, respectively. PTF-M38 was mainly composed of xylose, mannose, glucose, and galactose in a ratio of 1:1.47:0.48:0.34, while PTF-Y3 and PTF-Y8 were mainly composed of xylose, mannose and glucose in a ratio of 1:1.65:4.06 and 1:1.21:0.44, respectively. The sugar profiles of PTF-M38, PTF-Y3 and PTF-Y8 were also established for further comparison. These profiles showed that all three polysaccharides contained the same sugars but in different ratios, and the carbon sources (xylose, mannose, glucose, and galactose) affected the sugar ratios within the polysaccharides.
Hanyu Gu,Yilin Liu 대한산업공학회 2021 Industrial Engineeering & Management Systems Vol.20 No.4
Rapid population growth and increased demand for freight transport have multiplied the necessity for designing an efficient transportation system in recent years. The use of hubs facilities in distribution networks has resulted in a re-markable reduction in costs, the number of communication routes, and energy consumption. This study was carried out to design a multi-objective hub facilities location-allocation problem under uncertainties with important parame-ters, considering the importance of using hub networks in transportation systems. The aim was to diminish fixed and variable costs of the distribution network and the maximum time elapsed in the network. For this, a new mathematical model was developed and proposed to orient hubs under uncertainties. The mathematical model was solved using the epsilon constraint method and genetic algorithm (GA) and artificial bee colony (ABC) algorithm. From the results, the ABC algorithm performs better than the GA algorithm on a large scale.
Liu Ying,Li Bing,Song FangFang,Gao HanYu,Huang LiangDong,Chen XuXuan 한국전기전자재료학회 2022 Transactions on Electrical and Electronic Material Vol.23 No.6
High quality power is the prerequisite for high precision measurement of an electronic voltage transformer. In order to ensure a compact structure and stable operation of the transformer, this paper proposes a circuit and high voltage energy harvest of high precision electronic voltage transformer based on coupling capacitance. The energy extraction circuit is directly connected with the high voltage terminal through a capacitor, and the low DC voltage is obtained through the diode rectifier bridge. A self-holding duty cycle regulating circuit is installed on the DC side, and the power required by the load can be automatically adjusted to match the load. Because the overall load of the power extraction circuit is capacitive, there is no ferro-resonance problem. Furthermore, there is also no MCU in the device, so that the whole circuit has the advantages of small power loss, small volume, strong anti-interference ability, and can provide a stable DC power for the metering device. The proposed method is verifi ed in simulations using PSCAD/EMTDC.
( Hanyu Zhu ),( Xueyan Sun ),( Dongmei Liu ),( Liesheng Zheng ),( Liguo Chen ),( Aimin Ma ) 한국균학회 2017 Mycobiology Vol.45 No.4
An improved method for extracting high quality and quantity RNA from a jelly mushroom and a dimorphic fungus―Tremella fuciformis which is especially rich in polysaccharides, is described. RNA was extracted from T. fuciformis mycelium M1332 and its parental monokaryotic yeast-like cells Y13 and Y32. The A260/280 and A260/230 ratios were both approximately 2, and the RNA integrity number was larger than 8.9. The yields of RNA were between 108 and 213 μg/g fresh wt. Downstream molecular applications including reverse transcriptional PCR and quantitative real-time PCR were also performed. This protocol is reliable and may be widely applicable for total RNA extraction from other jelly mushrooms or filamentous fungi rich in polysaccharides.
Hu Hanyu,Shan Weifeng,Tang Yixiang,Heidari Ali Asghar,Chen Huiling,Liu Haijun,Wang Maofa,Escorcia-Gutierrez José,Mansour Romany F,Chen Jun 한국CDE학회 2022 Journal of computational design and engineering Vol.9 No.6
The sine cosine algorithm (SCA) is a metaheuristic algorithm proposed in recent years that does not resort to nature-related metaphors but explores and exploits the search space with the help of two simple mathematical functions of sine and cosine. SCA has fewer parameters and a simple structure and is widely used in various fields. However, it tends to fall into local optimality because it does not have a well-balanced exploitation and exploration phase. Therefore, in this paper, a new, improved SCA algorithm (QCSCA) is proposed to improve the performance of the algorithm by introducing a quick move mechanism and a crisscross mechanism to SCA and adaptively improving one of the parameters. To verify the effectiveness of QCSCA, comparison experiments with some conventional metaheuristic algorithms, advanced metaheuristic algorithms, and SCA variants are conducted on IEEE CEC2017 and CEC2013. The experimental results show a significant improvement in the convergence speed and the ability to jump out of the local optimum of the QCSCA. The scalability of the algorithm is verified in the benchmark function. In addition, QCSCA is applied to 14 real-world datasets from the UCI machine learning database for selecting a subset of near-optimal features, and the experimental results show that QCSCA is still very competitive in feature selection (FS) compared to similar algorithms. Our experimental results and analysis show that QCSCA is an effective method for solving global optimization problems and FS problems.
A New Variational Bayesian-based Kalman Filter with Random Measurement Delay and Non-Gaussian Noises
Chenghao Shan,Weidong Zhou,Hanyu Shan,Lu Liu 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.8
To improve the estimation accuracy of the Kalman filter in the scenario of random measurement delay and non-Gaussian process and measurement noises, a new variational Bayesian (VB)-based Kalman filter is proposed in this paper. First, the state expansion method and Bernoulli random variable (BRV) are utilized to characterize random measurement delay. Second, the one-step predicted probability density function (PDF) and measurement noise vectors are modeled as Student’s t (ST) distributions. Third, the likelihood function of two ST distributions is converted from a weighted sum to an exponential product to establish a hierarchical Gaussian state space model (HGSSM). Finally, the system state, BRV and intermediate random variables (IRV) are simultaneously estimated using the variational Bayesian (VB) method. Simulation experiment results indicate that the proposed filter has superior estimation performance to current filters to address the filtering problem of random measurement delay and non-Gaussian process and measurement noises.
Rapid Microwave Irradiation Synthesis and Photoelectrochemical Performance of Cu3BiS3 nanoparticles
Wei Wang,Guowei Zhi,Liu Liu,Yujie Fei,QinYang Sheng,Yushi Shi,Hanyu Yao,Hongqiang Qian 대한금속·재료학회 2022 ELECTRONIC MATERIALS LETTERS Vol.18 No.6
A photocatalytic material with high performance and low cost plays a decisive role in the industrialization of photocatalytichydrogen evolution. In this work, Cu3BiS3 nanoparticles were successfully synthesized by the microwave irradiationmethod, and the formation mechanism of Cu3BiS3 was studied. The Cu3BiS3 was a nanorod structure with 122 nm diameterand 41 nm length. The band gap was 1.31 eV and the EVB was located at 0.15 eV from the Mott-Schottky analysis. The Cu3BiS3 electrode exhibited an excellent HER performance with an onset potential of 870 mV, a Tafel slope of 251.07mV/dec. And the charge transfer resistance (Rct) of Cu3BiS3 electrode was 7.2 Ω. The electrode also revealed the goodphotoelectric response ability. The electrode also revealed the good photoelectric response ability and good stability bytime course of the photocurrents. This work provided a fast, low-cost method to prepare the Cu3BiS3 for photocatalysiswater splitting.
Likui Wang,Shichen Lu,Feng Xie,Hanyu Liu,Jiaping Li,Wei Shang,Zhe Zhang,Yuqing Wen 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.128 No.-
Aluminum (Al) alloys are used in a wide range of applications due to their advantages. However, theexisting corrosion protection methods have insufficient protection ability and cannot achieve longtermprotection. In this paper, reactive protective film on the surface of aluminum alloys using 1-hydroxyethyl-1,1-diphosphonic acid (HEDP) molecules. Then, Lauric acid/Graphene (LA/rGO) film is usedto prepared on the surface of HEDP film. SEM, XRD, EDS, Raman, XPS and WCA were conducted to analyzephysical and chemical features of coatings. The total resistance of the film reaches 1.0 1020 Xcm2, in asalt spray test using 5wt% NaCl as the corrosion medium, corrosion spots appeared on day 28 with a corrosioninhibition efficiency of 99.99%. Theoretical studies with quantum chemical calculations haveshown that HEDP/LA/rGO composite films can be adsorbed on Al alloy surfaces through P-O-Al and PO-C chemical bonding. The influence of phosphate synergistic effect on the corrosion resistance of theself-assembled superhydrophobic composite film on the surface of 6061 aluminum alloy is discussed. This study presents a scientific and innovative design concept to develop coatings with excellent corrosionprotection for aluminum alloy, and then extend their application to certain areas.