EBKCCA: A Novel Energy Balanced k-Coverage Control Algorithm Based on Probability Model in Wireless Sensor Networks

( Zeyu Sun ),( Yongsheng Zhang ),( Xiaofei Xing ),( Houbing Song ),( Huihui Wang ),( Yangjie Cao ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.8

In the process of k-coverage of the target node, there will be a lot of data redundancy forcing the phenomenon of congestion which reduces network communication capability and coverage, and accelerates network energy consumption. Therefore, this paper proposes a novel energy balanced k-coverage control algorithm based on probability model (EBKCCA). The algorithm constructs the coverage network model by using the positional relationship between the nodes. By analyzing the network model, the coverage expected value of nodes and the minimum number of nodes in the monitoring area are given. In terms of energy consumption, this paper gives the proportion of energy conversion functions between working nodes and neighboring nodes. By using the function proportional to schedule low energy nodes, we achieve the energy balance of the whole network and optimizing network resources. The last simulation experiments indicate that this algorithm can not only improve the quality of network coverage, but also completely inhibit the rapid energy consumption of node, and extend the network lifetime.

A Nonlinear Multiple-target Coverage Protocol Based on Data Integration of Wireless Sensor Networks

Zeyu Sun,Yongsheng Zhang,Chuanfeng Li,Yangjie Cao,Yalin Nie,Yuanbo Li 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.10

In the process of coverage for multiple targets, due to the existence of a large number of redundant data make the effective monitoring area coverage decreased and force the network to consume more energy. Therefore, this paper proposes a multi-target k-coverage preservation protocol. First of all, establish the affiliation between the sensor nodes and target nodes through the network model, present a method to compute the coverage expected value of the monitoring area; secondly, in the network energy conversion, using scheduling mechanism in sensor nodes to attain the network energy balance, and achieve different network coverage quality through different nodes energy conversion. Finally, simulation results show that NMCP can effectively reduce the number of active nodes meeting certain coverage requirements and then improve the network lifetime.

Ion-imprinted antifouling nanocomposite membrane for separation of lithium ion

Dongshu Sun,Tianyu Zhou,Yang Lu,Yongsheng Yan,Chunbo Liu,Guangbo Che 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.9

Membrane fouling is a primary challenge restricting the practical application of membrane separation technology. Inspired by the idea that improving hydrophilicity would lead to antifouling performance of membrane material. In this work, ion-imprinted antifouling nanocomposite membrane (LiI-NcMs) blended with GO and TiO2 nanomaterialwas fabricated for selective separation of lithium ion. As a result, markedly improved hydrophilicity was achievedon LiI-NcMs (55.1o for contact angle). LiI-NcMs also showed good selective adsorption capacity in the mixed solutionof Mg2+ and Li+. Moreover, LiI-NcMs exhibited superior stability; after 20 adsorption/desorption cycles a maximumadsorption capacity of 88.1% can be maintained. This work demonstrates a new and facile approach to prepare novelmembrane separation material for a particular substance for efficient selective separation in industrial applications.

Geochemistry of Late Carboniferous sedimentary rocks from the Zongwulong structural belt and adjacent areas, Qaidam Basin, China: implications for provenance and tectonic setting

Yuan Peng,Yongsheng Zhang,Jiaopeng Sun,Enyuan Xing,Huatai Yu 한국지질과학협의회 2018 Geosciences Journal Vol.22 No.2

This paper documents the geochemistry of clastic sedimentary rocks from the Upper Carboniferous Zongwulong Group in the Zongwulong structural belt of the Qaidam Basin, NW China, in order to trace the sources of the sediments and to understand their tectonic settings at the time of deposition of the Zongwulong Group. Although the major elements differ among different samples, their low mean chemical index of alteration mean CIA = 51.04–64.79), plagioclase index of alteration (mean PIA = 51.41–69.54), and relatively high mean index of compositional variability (mean ICV = 1.18–1.56) indicate relatively low maturity and weak to moderate chemical weathering of their source. The Zr/Sc-Th/Sc diagram and relatively high mean ICV suggest that all sediments of Zongwulong Group have undergone no significant sediment recycling. All samples yield relatively high Al2O3/TiO2 ratios (16–27), strong LREE/HREE differentiation (mean LaN/YbN = 10.83–12.66), and obvious negative Eu anomalies (mean Eu/Eu* = 0.61–0.79). Combined with characteristic ratios (La/Sc, Th/Sc, Cr/Th, and Th/Co) and the provenance discriminant diagrams (Al2O3-(CaO* + Na2O)-K2O and Ni-TiO2), these results indicate felsic source rocks. Combined with the findings of previous studies, the representative values (La, Ce, ΣREE, V, Rb/Sr, Eu/Eu*, La/Sc, Th/Sc, and Zr/Th) and tectonic setting discriminants (SiO2-K2O/Na2O, Fe2O3 + MgO-Al2O3/SiO2, La/Sc-Ti/Zr, and Th-Sc-Zr/10) indicate that the Zongwulong Group sediments were deposited in a back-arc extensional basin behind the active continental margin-continental island arc tectonic setting.

Growth behavior and kinetics of magnetite during magnetization roasting

Qiang Zhang,Yongsheng Sun,Shuai Wang,Yuexin Han,Yanjun Li,Peng Gao 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-

The magnetization roasting of hematite with two particle sizes was performed to investigate the growthbehavior and kinetics of magnetite. The magnetite exhibited comparable growth trends throughout themagnetization roasting process at different roasting temperatures, and enhancing the roasting temperaturecan facilitate the growth of magnetite. The nascent magnetite nuclei appeared acicular, predominantlydeveloped along the edges and fissures of the hematite particles before progressively growinginward. Moreover, the temperature stress and magnetite formation led to the loose and porous structureof the nascent magnetite particles. The growth kinetics demonstrated that the growth process of magnetitecould be divided into induction period and growth period based on the different growth rates. For the same hematite sample, the growth rate of magnetite in the induction period was lower than thatin the growth period. The magnetization roasting of hematite with a smaller particle size may be completedin a shorter time, even if increasing the particle size of hematite can accelerate the growth rateof magnetite. The growth kinetic models were established based on the parabolic law, and the reliabilityof describing the growth process of magnetite was verified by comparing the predicted values with theexperimental values.

Producing magnetite concentrate via self-magnetization roasting in N2 atmosphere: Phase and structure transformation, and extraction kinetics

Qi Zhang,Yongsheng Sun,Yuexin Han,Yanjun Li,Peng Gao 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.104 No.-

In this work, a green self-magnetization roasting technology for producing magnetite was proposed withoutadding additional. The regulatory mechanisms of the main factors (siderite dosage, roasting temperature,and roasting time) on the self-magnetization roasting process were investigated. In-situ kinetic ofthe self-magnetization roasting process was analyzed by the infrared gas analyzer, and the phase transformationwas investigated by in-situ X-ray diffraction and Mössbauer. Under the optimal roasting conditionsof 30% siderite dosage, 730 C, and 7.5 min, the iron concentrate with Fe grade 68.82% and Ferecovery 99.48% was obtained. The kinetic and phase transformation results indicated that the selfmagnetizationroasting process was divided into two stages: siderite pyrolysis in the prophase stage,and hematite reduced to magnetite by reductant (FeO and CO) from siderite pyrolysis in the anaphasestage. The SEM analyses showed that the newborn magnetite crystals were mainly coarse-grained andneedles, which fitted the kinetics characteristics for the Nucleation model. Using self-magnetizationroasting technology, siderite and hematite would promote mutual reduction to improve product magnetismand roasting efficiency without adding reductant. Also, self-magnetization roasting will enhancethe utilization rate of siderite, and it contributes to energy conservation and CO2 emission reduction.

Magnetic imprinted nanomicrosphere attached to the surface of bacillus using miniemulsion polymerization for selective recognition of 2,4,6-trichlorophenol from aqueous solutions

Ping Yu,Yongsheng Yan,Qilong Sun,Jianfeng Li,Zhenjiang Tan,Chunxiang Li 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-

In the work, we reported an effective method for the preparation of surface molecularly imprintedpolymers based on bacillus as substrate material with superparamagnetic property throughminiemulsion polymerization. Then, the obtained magnetic surface molecularly imprinted polymers(MMIPs) were evaluated as adsorbents for selective recognition 2,4,6-trichlorophenol (2,4,6-TCP) fromaqueous medium. The resulting MMIPs were characterized by several techniques including FT-IR, SEM,TEM, Raman, XRD, VSM and TGA. The results demonstrated rod-shaped MMIPs was covered withimprinted layer, and exhibited chemical stability and good magnetic sensitivity. Batch mode of bindingstudies were carried out to determine the equilibrium isotherm, kinetics, selectivity adsorption andregeneration of MMIPs toward 2,4,6-TCP. The results indicated that the selective adsorption behaviors ofMMIPs were well described by the Langmuir isotherm model and the pseudo-second-order kineticsmodel. The specific adsorption capacity of MMIPs was 45.16 mg g 1 at 298 K, which was 2.15 timeshigher than that of magnetic non-imprinted polymers (MNIPs). The selective recognition studiesdemonstrated the outstanding affinity and selectivity toward 2,4,6-TCP in the presence of competitivephenols. The regeneration study showed excellent adsorption capacity even after five regenerationcycles. In addition, MMIPs were successfully applied to the extraction of 2,4,6-TCP from milk sample.

Pyrolysis mechanism of bastnaesite during roasting in N2 atmosphere: An in-situ study of gas products, phase transition, and kinetics

Qiang Zhang,Yongsheng Sun,Yuexin Han,Peng Gao,Wenbo Li 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-

The application of suspension magnetization roasting technology in ferruginous rare earth bearing orehas gained significant attention. Bastnaesite, due to its pyrolysis characteristics, has been proposed asa reductant for iron minerals. In this study, the pyrolysis of bastnaesite was investigated through variousin-situ methods. The results showed that during pyrolysis, CeOF and CO2 were first generated, followedby the reaction of CO2 with Ce2O3 and Ce7O12 to produce CO. Pyrolysis occurred initially on the particlesurface and then progressed inward. Increasing the roasting temperature promoted the pyrolysis of bastnaesiteand CO generation. The addition of CO2 during the roasting process enhanced the formation of CO. The pyrolysis kinetic mechanisms under isothermal and non-isothermal conditions were phaseboundarycontrolled reaction mechanism (n = 4) and phase-boundary controlled reaction mechanism(n = 2–4), respectively. This detailed analysis of the pyrolysis behavior of bastnaesite facilitates the efficientand low-carbon development of ferruginous rare earth ores through suspension magnetizationroasting.

Performance evaluation of high g accelerometers

Yubin Lu,Yongsheng Cheng,Yuancheng Sun 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.11

A numerical model for the split Hopkinson bar fly-away technique is presented to evaluate the performance of accelerometers measuring large amplitude pulses. Simulation results based on the numerical model indicate that the rise time of the incident stress pulse in the incident bar and the disk length are of appropriate lengths for the disk response to be accurately approximated as a rigid-body motion. Strain–time histories demonstrate that the incident strain pulse is non-dispersive. The rigid-body acceleration of the disk is derived from analytical models with stress at the incident bar/disk interface, incident strain–time data, and particle velocity on the free end of the disk calculated from numerical results. Thus, accelerations measured using the accelerometer and those derived from the models can be compared. These acceleration-time pulses show good agreement. The numerical model of the split Hopkinson bar fly-away technique can be used to calibrate high g accelerometers.

Murine Model Study of a New Receptor-Targeted Tracer for Sentinel Lymph Node in Breast Cancer

Chonglin Tian,Xiao Sun,Bin-Bin Cong,Pengfei Qiu,Yongsheng Wang 한국유방암학회 2019 Journal of breast cancer Vol.22 No.2

Purpose: Sentinel lymph node biopsy (SLNB), a critical staging and treatment step, has replaced axillary lymph node (LN) dissection as the standard staging procedure for early stage breast cancer patients with clinically negative axillary LNs. Hence, using a murine sentinel lymph node (SLN) model, we investigated the localization effect of the new receptor-targeted tracer, indocyanine green (ICG)-rituximab, on breast cancer SLNB. Methods: After establishing the murine SLN model, different doses of ICG-rituximab were subcutaneously injected into the hind insteps of BALB/c mice to determine the optimal dose and imaging time using continuous (> 3 hours) MDM-I fluorescence vasculature imaging. To explore the capacity of ICG-rituximab for sustained SLN localization with the optimal dose, MDM-I imaging was monitored at 6, 12, and 24 hours. Results: The popliteal LN was defined as the SLN for hindlimb lymphatic drainage, the iliac LN as the secondary, and the para-aortic or renal LN as the tertiary LNs. The SLN initial imaging and optimal imaging times were shortened with increased ICG-rituximab doses, and the imaging rates of the secondary and tertiary LNs increased accordingly. The optimal ICG dose was 0.12 μg, and its optimal imaging time was 34 minutes. After 24 hours, the SLN imaging rate remained 100%, while those of the secondary and the tertiary LNs increased from 0% (6 hours) and 0% (6 hours) to 10% (12 hours) and 10% (12 hours) to 20% (24 hours) and 10% (24 hours), respectively. Conclusion: ICG-rituximab localized to the SLN without imaging from the secondary or tertiary LNs within 6 hours. The optimal ICG dose was 0.12 μg, and the optimal interval for SLN detection was 34 minutes to 6 hours post-injection. This novel receptor-targeted tracer is of great value to clinical research and application.