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Shuttle-run synchronization in mobile ad hoc networks

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Frontiers of physics 2015年第3期10卷 105-112页

作者： Sheng-Fei Ma hong-jie bi Yong Zou Zong-Hua Liu Shu-Guang Guan Department of Physics East China Normal University Shanghai 200241 China State Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China

In this work, we study the collective dynamics of phase oscillators in a mobile ad hoc network whose topology changes dynamically. As the network size or the communication radius of individual oscillators increases, the topology of the ad hoc network first undergoes percolation, forming a giant cluster, and then gradually achieves global connectivity. It is shown that oscillator mobility generally enhances the coherence in such networks. Interestingly, we find a new type of phase synchronization/clustering, in which the phases of the oscillators are distributed in a certain narrow range, while the instantaneous frequencies change signs frequently, leading to shuttle-run-like motion of the oscillators in phase space. We conduct a theoretical analysis to explain the mechanism of this synchronization and obtain the critical transition point.

关键词： synchronization phase transition ad hoc network

Anaerobic ammonium oxidation for advanced municipal wastewater treatment: is it feasible?

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Journal of Environmental Sciences 2005年第6期17卷 1022-1024页

作者： LI jie XIONG bi-yong ZHANG Shu-de YANG hong ZHANG jie School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China Key Lab of Water Quality Science and Water Environment Recovery Engineering Beijing University of Technology Beijing 100022 China

Anaerobic ammonium oxidation（ANAMMOX） is a recently developed process to treat ammonia-rich wastewater. There were numerous articles about the new technology with focus on the ammonium-rich wastewater treatment, but few on advanced municipal wastewater treatment. The paper studied the anaerobic ammonium oxidation （ANAMMOX） process with a down flow anoxic biofilter for nitrogen removal from secondary clarifier effluent of municipal wastewater with low COD/N ratio. The results showed that ANAMMOX process is applicable to advanced wastewater treatment with normal temperature as well as ammonia-rich high temperature wastewater treatment. The results indicated that ammonia removal rate was improved by raising the nitrite concentration, and the reaction rate reached a climax at 118.4 mgN/L of the nitrite nitrogen concentration. If the concentration exceeds 118.4 mgN/L, the ANAMMOX process was significantly inhibited although the ANAMMOX bacteria still showed a relatively high reactivity. The data also indicated that the ratio of NO2^- -N：NH4 ＊ -N = 1.3：1 in the influent was appropriate for excellent nitrogen removal. The pH increased gradually along the ANAMMOX biofilter reactor. When the ANAMMOX reaction was ended, the pH was tend to calm. The data suggested that the pH could be used as an indicator to describe the course of ANAMMOX reaction.

关键词： ANAMMOX anoxic biofilter advanced treatment nitrogen removal nitrite

The effect of the endosymbiont Wolbachia on the behavior of insect hosts

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Insect Science 2020年第5期27卷 846-858页

作者： jie bi Yu-Feng Wang School of Life Sciences Hubei Key Laboratory of Genetic Regulation and Integrative BiologyCentral China Normal UniversityWuhanChina

As one of the most successful intracellular symbiotic bacteria,Wolbachia can infect many arthropods and *** infection usually affects the reproduction of their hosts to promote their own proliferation and ***,most of the studies focus on the mechanisms of Wolbachia interactions with host ***,in addition to distribution in the reproductive tissues,Wolbachia also infect various somatic tissues of their hosts,including the *** raises the potential that Wolbachia may influence some somatic processes,such as behaviors in their ***,information about the effects of Wolbachia infection on host behavior is still very *** present review presents the current literature on different aspects of the influence of Wolbachia on various behaviors,including sleep,learning and memory,mating,feeding and aggression in their insect *** then highlight ongoing scientific efforts in the field that need addressing to advance this field,which can have significant implications for further developing Wolbachia as environmentally friendly biocontrol agents to control insect-borne diseases and agricultural pests.

关键词： aggression insect hosts learning and memory capacity mating sleep Wolbachia

Early constraint-induced movement therapy affects behavior and neuronal plasticity in ischemia-injured rat brains

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Neural Regeneration Research 2019年第5期14卷 775-782页

作者： Xi-Hua Liu hong-Yan bi jie Cao Shuo Ren Shou-Wei Yue Department of Physical Medicine & Rehabilitation Affiliated Hospital of Shandong Traditional Chinese Medicine University Maternal and Child Health Development Research Center Shandong Maternal and Child Health Hospital Department of Physical Medicine & Rehabilitation Qilu Hospital Shandong University

Constraint-induced movement therapy is an effective rehabilitative training technique used to improve the restoration of impaired upper extremity movement after stroke. However, whether constraint-induced movement therapy is more effective than conventional rehabilitation in acute or sub-acute stroke remains controversial. The aim of the present study was to identify the optimal time to start constraint-induced movement therapy after ischemic stroke and to explore the mechanisms by which constraint-induced movement therapy leads to post-stroke recovery. Sixty-four adult male Sprague-Dawley rats were randomly divided into four groups: sham-surgery group, cerebral ischemia/reperfusion group, early constraint-induced movement therapy group, and late constraint-induced movement therapy group. Rat models of left middle cerebral artery occlusion were established according to the Zea Longa line embolism method. Constraint-induced movement therapy was conducted starting on day 1 or day 14 in the early constraint-induced movement therapy and late constraint-induced movement therapy groups, respectively. To explore the effect of each intervention time on neuromotor function, behavioral function was assessed using a balance beam walking test before surgery and at 8 and 21 days after surgery. The expression levels of brain-derived neurotrophic factor, nerve growth factor and Nogo receptor were evaluated using real time-polymerase chain reaction and western blot assay to assess the effect of each intervention time. The results showed that the behavioral score was significantly lower in the early constraint-induced movement therapy group than in the cerebral ischemia/reperfusion and late constraint-induced movement therapy groups at 8 days. At 21 days, the scores had significantly decreased in the early constraint-induced movement therapy and late constraint-induced movement therapy groups. At 8 days, only mild pyknosis appeared in neurons of the ischemic penumbra in the early co

关键词： nerve regeneration ischemic stroke rehabilitation constraint-induced movement therapy nerve growth factors functional recovery neuronal plasticity real time-polymerase chain reaction western blot assay rats neural regeneration

Ideal bi-Based Hybrid Anode Material for Ultrafast Charging of Sodium-Ion Batteries at Extremely Low Temperatures

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NANO-MICRO LETTERS 2025年第1期17卷 1-16页

作者： Bai, jie Jia, Jian Hui Wang, Yu Yang, Chun Cheng Jiang, Qing Jilin Univ Key Lab Automobile Mat Sch Mat Sci & Engn Minist Educ Changchun 130022 Peoples R China

Metallic nanoparticles with excellent size controllability and high loading rate are obtained via ultrafast high temperature shock *** bi/CNRs-15 electrode exhibits an unprecedented rate performance (237.9 mAh g-1 at 2 A g-1) at - 60 degrees C, while the energy density of the full cell can reach to 181.9 Wh kg-1 at - 40 degrees C.A novel strategy of high-rate activation is proposed to obtain high capacity and superior stability at low temperature by creating new active sites for interfacial reaction. Sodium-ion batteries have emerged as competitive substitutes for low-temperature applications due to severe capacity loss and safety concerns of lithium-ion batteries at - 20 degrees C or lower. However, the key capability of ultrafast charging at ultralow temperature for SIBs is rarely reported. Herein, a hybrid of bi nanoparticles embedded in carbon nanorods is demonstrated as an ideal material to address this issue, which is synthesized via a high temperature shock method. Such a hybrid shows an unprecedented rate performance (237.9 mAh g-1 at 2 A g-1) at - 60 degrees C, outperforming all reported SIB anode materials. Coupled with a Na3V2(PO4)3 cathode, the energy density of the full cell can reach to 181.9 Wh kg-1 at - 40 degrees C. Based on this work, a novel strategy of high-rate activation is proposed to enhance performances of bi-based materials in cryogenic conditions by creating new active sites for interfacial reaction under large current.

关键词： bi nanoparticles High temperature shock High-rate activation Ultrafast charging Low-temperature sodium-ion batteries

Comparisons of Condylar Movements with the Functional Occlusal Clutch and Tray Clutch Recording Methods in CADIAX~ system

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International Journal of Oral Science 2010年第4期2卷 208-214页

作者： bi-jie Han hong Kang Lai-kui Liu Xin-zhu Yi Xiao-qing Li Department of Oral Anatomy and Physiology West China College of Stomatology Sichuan University Chengdu China Institute of Stomatology Lanzhou University Lanzhou China College of Stomatology Nanjing Medical Science University Nanjing China

Aim The purpose of this study is to compare the effects of the two clutches on recording the condylar movement. Methodology Ten subjects （6 women,4 men; mean age 25.4 years） participated in the study. The mandibular move-ment,sagittal condylar inclination angle,and transversal condylar inclination angle of each subject were recorded with the CADIAX？ using the two clutches,respectively. The characteristics of the tracings of the protrusion,opening,and mediotrusion were analyzed with the t-test statistics at α = 0.05 level. The Kappa values were calculated for an assessment of the congruence of the tracings. Results The results showed that the contour,direction,and dimension of the tracings in the two clutches were approxi-mately same,but the tracings determined by the functional occlusal clutch were more regular and congruent. In the group segment recorded with the tray clutch,opening/ closing paths of one subject showed crossed and time curves of three subjects appeared peak-like changes of velocity,but none were statistically different （P0.05）. Conclusion The research suggests that the functional occlusal clutch should be preferred in the evaluation of the mandibular function,as the tracings with the tray clutch are more likely to produce false positive results.

关键词： CADIAX temporomandibular joint mandibular movement functional clutch occlusion

Applying Deep Learning to Individual and Community Health Monitoring Data:A Survey

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International Journal of Automation and computing 2018年第6期15卷 643-655页

作者： Zhen-jie Yao jie bi Yi-Xin Chen Beijing Advanced Innovation Center for Future Internet Technology Beijing University of Technology Department of Computer Science and Engineering Washington University in St.Louis

In the recent years, deep learning models have addressed many problems in various fields. Meanwhile, technology development has spawned the big data in healthcare rapidly. Nowadays, application of deep learning to solve the problems in healthcare is a hot research direction. This paper introduces the application of deep learning in healthcare extensively. We focus on 7 application areas of deep learning, which are electronic health records （EHR）, electrocardiography （ECG）, electroencephalogram （EEG）, community healthcare, data from wearable devices, drug analysis and genomics analysis. The scope of this paper does not cover medical image processing since other researchers have already substantially reviewed it. In addition, we analyze the merits and drawbacks of the existing works, analyze the existing challenges, and discuss future trends.

关键词： Deep learning healthcare electronic health records (EHR) neural networks survey.

Fast three-dimensional radiation field characterization in largescale nuclear installations

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Nuclear Science and Techniques 2017年第5期28卷 53-59页

作者： Yuan-jie bi Zhi-Ping Luo Jin-Sen Guo Chuan-Long Li hong-Wei Yang Ling Chen China Institute of Atomic Energy Beijing 102413 China

The requirement of the fast three-dimensional radiation field calculation is raised during the decommissioning of large-scale nuclear installations. The most often used methods, such as the Monte Carlo and the discrete ordinates methods, have shortcomings in their simulations of such problems. The coupled Monte Carlo–point kernel computational scheme is developed to meet the requirement. The facility is separated into the source region and the bulk shielding region, with a common interface. The transport within the source region is simulated using the Monte Carlo method, which is by nature good at treating complex geometries. The radiation field in the bulk shielding region is treated by the point kernel approach to avoid the extremely expensive computation for deep penetration problems. The flow rate through the interface,which is given by the Monte Carlo simulation, is considered as the equivalent surface source for the point kernel calculation. Test calculations from simplified typical waste storage facilities have been performed to validate the coupled scheme by comparing them with the results conducted by the Monte Carlo method directly. The good agreement of the results, as well as the significant saving in computing time, indicates that the coupled method is suitable for the fast three-dimensional radiation field calculation.

关键词： Fast radiation field calculation Point kernel approach Monte Carlo method Coupled computational scheme

Investigating the disk-corona relation in a blue AGN sample

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Research in Astronomy and Astrophysics 2009年第9期9卷 966-978页

作者： jie-Ying Liu bi-Fang Liu National Astronomical Observatories / Yunnan Observatory Chinese Academy of SciencesKunming 650011 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

We compile a blue AGN sample from SDSS and investigate how the ratio of hard X-ray to bolometric luminosity depends on the Eddington ratio and black hole mass. Our sample comprises 240 radio-quiet Seyfert 1 galaxies and QSOs. We find that the fraction of hard X-ray luminosity （log（L2-10keV/L bol）） decreases with an increase of the Eddington ratio. We also find that the fraction of hard X-ray luminosity is independent of the black hole mass for radio-quiet AGNs. The relation of log（L2-10 keV/Lbol） decreasing with increasing Eddington ratio indicates that X-ray bolometric correction is not a constant, from a larger sample supporting the results of Vasudevan ＆ Fabian. We interpret our results by the disk corona evaporation/condensation model. In the frame work of this model, Compton cooling becomes efficient in cooling the corona at high accretion rates （in units of Eddington rate）, leading to condensation of coronal gas to the disk. Consequently, the relative strength of the corona to the disk becomes weaker at higher Eddington ratios. Therefore, the fraction of hard X-ray emission to disk emission and hence to the bolometric emission is smaller at higher Eddington ratios. The independence of the fraction of hard X-ray luminosity with respect to the mass of the black hole can also be explained by the disk corona model since the coronal structure and luminosity （in units of Eddington luminosity） are independent of the mass of black holes.

关键词： accretion: accretion disks -- galaxies: active -- X-rays: galaxies