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Research on the Scheduling of Legal Operating Vehicles based on NFC
Jiyan Lin,Peini Shang,Fei Yang,Yongheng Zhang 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.11
In the study of reasons that cause the flush illegal operating vehicles, we found out that the insufficient legal operating vehicles were the main cause. In order to efficiently solve the illegal operating, the paper brings out the research of scheduling algorithm about the legal operating vehicles based on NFC. The research uses the NFC technology to realize the intelligent and fast identification and the scheduling algorithm to realize the problem of insufficient legal operating vehicles. The scheduling can be divided into two stages--the multi-level queues high response ratio first scheduling and the multi-level queues earliest available time first scheduling. The algorithm can choose the user whose response ratio is the highest from the users’scheduling list and allocate the user who has the highest ratio to the legal operating vehicle who has the earliest available time that in the same area. Experiment indicates that the scheduling success ratio, throughput, average waiting time of the scheduling algorithm are superior to random travel of the drivers and can efficiently resolve the insufficient of legal operating vehicles.
Liang, Weizheng,Gao, Min,Lu, Chang,Zhang, Zhi,Chan, Cheuk Ho,Zhuge, Lanjian,Dai, Jiyan,Yang, Hao,Chen, Chonglin,Park, Bae Ho,Jia, Quanxi,Lin, Yuan American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.9
<P>Vanadium dioxide (VO<SUB>2</SUB>) is a strong-correlated metal-oxide with a sharp metal-insulator transition (MIT) for a range of applications. However, synthesizing epitaxial VO<SUB>2</SUB> films with desired properties has been a challenge because of the difficulty in controlling the oxygen stoichiometry of VO<SUB><I>x</I></SUB>, where <I>x</I> can be in the range of 1 < <I>x</I> < 2.5 and V has multiple valence states. Herein, a unique moisture-assisted chemical solution approach has been developed to successfully manipulate the oxygen stoichiometry, to significantly broaden the growth window, and to significantly enhance the MIT performance of VO<SUB>2</SUB> films. The obvious broadening of the growth window of stoichiometric VO<SUB>2</SUB> thin films, from 4 to 36 °C, is ascribed to a self-adjusted process for oxygen partial pressure at different temperatures by introducing moisture. A resistance change as large as 4 orders of magnitude has been achieved in VO<SUB>2</SUB> thin films with a sharp transition width of less than 1 °C. The much enhanced MIT properties can be attributed to the higher and more uniform oxygen stoichiometry. This technique is not only scientifically interesting but also technologically important for fabricating wafer-scaled VO<SUB>2</SUB> films with uniform properties for practical device applications.</P> [FIG OMISSION]</BR>
Assessment of phenanthrene bioavailability in aged and unaged soils by mild extraction.
Khan, Muhammad Imran,Cheema, Sardar Alam,Shen, Chaofeng,Zhang, Congkai,Tang, Xianjin,Shi, Jiyan,Chen, Xincai,Park, Joonhong,Chen, Yingxu D. Reidel Pub. Co ; Springer 2012 Environmental monitoring and assessment Vol.184 No.1
<P>It has become apparent that the threat of an organic pollutant in soil is directly related to its bioavailable fraction and that the use of total contaminant concentrations as a measure of potential contaminant exposure to plants or soil organisms is inappropriate. In light of this, non-exhaustive extraction techniques are being investigated to assess their appropriateness in determining bioavailability. To find a suitable and rapid extraction method to predict phenanthrene bioavailability, multiple extraction techniques (i.e., mild hydroxypropyl-β-cyclodextrin (HPCD) and organic solvents extraction) were investigated in soil spiked to a range of phenanthrene levels (i.e., 1.12, 8.52, 73, 136, and 335?μg?g(?-?1) dry soil). The bioaccumulation of phenanthrene in earthworm (Eisenia fetida) was used as the reference system for bioavailability. Correlation results for phenanthrene suggested that mild HPCD extraction was a better method to predict bioavailability of phenanthrene in soil compared with organic solvents extraction. Aged (i.e., 150?days) and fresh (i.e., 0?day) soil samples were used to evaluate the extraction efficiency and the effect of soil contact time on the availability of phenanthrene. The percentage of phenanthrene accumulated by earthworms and percent recoveries by mild extractants changed significantly with aging time. Thus, aging significantly reduced the earthworm uptake and chemical extractability of phenanthrene. In general, among organic extractants, methanol showed recoveries comparable to those of mild HPCD for both aged and unaged soil matrices. Hence, this extractant can be suitable after HPCD to evaluate risk of contaminated soils.</P>