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Temporal variation of the underwater soundscape in Jiaotou Bay,an Indo-Pacific humpback dolphin(Sousa chinensis)habitat off Hainan Island,China

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Integrative Zoology 2021年第4期16卷 477-498页

作者： lijun dong Jianchen dong Francesco CARUSO Likun ZHAO Songhai LI Marine Mammal and Marine Bioacoustics Laboratory Chinese Academy of SciencesInstitute of Deep-sea Science and EngineeringSanyaChina University of Chinese Academy of Sciences BeijingChina Tropical Marine Science Institute National University of SingaporeSingapore Function Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdaoChina

The underwater soundscape is an important ecological element affecting numerous aquatic animals,in particular dolphins,which must identify salient cues from ambient ocean *** this study,temporal variations in the soundscape of Jiaotou Bay were monitored from February 2016 to January 2017,where a population of Indo-Pacific humpback dolphins(Sousa chinensis)has recently been a regular *** autonomous acoustic recorder was deployed in shallow waters,and 1/3-octave band sound pressure levels(SPLs)were calculated with central frequencies ranging from 25 Hz to 40 kHz,then were grouped into 3 subdivided bands via cluster *** at each major band showed significant differences on a diel,fishing-related period,seasonal,and tidal phase *** noise generated by passing ships and underwater explosions were recorded in the study *** fish and dolphin acoustic activities both exhibited diel and seasonal variations,but no tidal cycle patterns.A negative significant relationship between anthropogenic sound detection rates and dolphin detection rates were observed,and fish detection rates showed no effect on dolphin detection rates,indicating anthropogenic activity avoidance and no forced foraging in dolphins in the study *** results provide fundamental insight into the acoustic dynamics of an important Indo-Pacific humpback dolphin habitat within a coastal area affected by a rapid increase in human activity,and demonstrate the need to protect animal habitat from anthropogenic noises.

关键词： acoustic monitoring anthropogenic noise dolphin detection rate sound pressure level temporal difference

Potential impacts of shipping noise on Indo-Pacific humpback dolphins and implications for regulation and mitigation:a review

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Integrative Zoology 2018年第5期13卷 495-506页

作者： Songhai LI Mingming LIU lijun dong Jianchen dong Ding WANG Sanya Key Laboratory of Marine Mammal and Marine Bioacoustics Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanyaChina University of Chinese Academy of Sciences BeijingChina Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences Institute of HydrobiologyChinese Academy of SciencesWuhanChina

Shipping noise is a widespread and relatively loud sound source among human-induced underwater *** impacts of shipping noise are of special concern for Indo-Pacific humpback dolphins(Sousa chinensis),as they inhabit shallow and nearshore habitats and are highly dependent on sound for *** study synthesizes our current understanding of the potential impacts of shipping noise on Indo-Pacific humpback dolphins combined with knowledge on sound production and hearing of these animals and the impacts of noise on other whales and *** further protection and management of Indo-Pacific humpback dolphins and their habitats,shipping noise should be regulated and mitigated to modify sound from ships,to reduce overall noise levels,and to set more marine protected areas(MPAs)covering most Indo-Pacific humpback dolphin habitats with seasonal and geographical restrictions to avoid ensonification of shipping *** emphasis for future research should be on obtaining more baseline information about the population distribution,sound production,hearing capabilities at the population level,behavior,and stress hormones of the humpback dolphins under different noise conditions or under different noise-producing activities,and/or in high-noise areas compared with relatively quiet areas,and the noise characteristics of ships of different types,sizes and speeds.

关键词： echolocation hearing noise impacts protection sound production

Concentration and source identification of polycyclic aromatic hydrocarbons and phthalic acid esters in the surface water of the Yangtze River Delta,China

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Journal of Environmental Sciences 2012年第2期24卷 335-342页

作者： Lifei Zhang Liang dong lijun Ren Shuangxin Shi Li Zhou Ting Zhang Yeru Huang State Environmental Protection Key Laboratory of Dioxin Pollution Control National Research Center for Environmental Analysis and Measurement Beijing 100029 China

The pollution from polycyclic aromatic hydrocarbons（PAHs） and phthalic acid esters（PAEs） in the surface water of the rapidly urbanized Yangtze River Delta region was *** surface water samples were collected in June *** samples were liquid-liquid extracted using methylene chloride and analyzed by gas chromatography-mass *** of PAHs and PAEs ranged 12.9-638.1 ng/L and 61-28550 ng/L,***,naphthalene,pyrene,phenanthrene,di-2ethylhexyl phthalate,and di-n-butyl phthalate were the most abundant compounds in the *** water samples were moderately polluted with benzo[a]pyrene according to China＇s environmental quality standard for surface *** two highest concentrations of PAHs and PAEs occurred in samples from Taihu Lake,Wuxi City and the western section of Yangchenghu *** sources of pollution at S7 were petroleum combustion and the plastics industry,and at Yangchenghu Lake were petroleum combustion and domestic *** in samples from the Beijing-Hangzhou Grand Canal originated from diesel *** were no obvious sources of pollution for the other water *** results can be used as reference levels for future monitoring programs of pollution from PAHs and PAEs.

关键词： polycyclic aromatic hydrocarbons phthalic acid esters Yangtze River Delta surface water

Hop-by-hop Content Distribution with Network Coding in Multihop Wireless Networks

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Digital Communications and Networks 2017年第1期3卷 47-54页

作者： Rami Halloush Hang Liu lijun dong Mingquan Wu Hayder Radha Department of Telecommunications Engineering Yarmouk University Irbid Jordan Department of Electrical Engineering and Cor~uter Sci The Catholic University of America Washington DC USA Huawei Research Center Santa Clara CA USA Huawei Technologies USA Inc. Bridgewater N J USA Department of Electrical and Computer Engineering Michigan State University East Lansing MI USA

The predominant use of today＇s networks is content access and distribution. Network Coding （NC） is an innovative technique that has potential to improve the efficiency of multicast content distribution over multihop Wireless Mesh Networks （WMNs） by allowing intermediate Forwarding Nodes （FNs） to encode and then forward data packets. Practical protocols are needed to realize the benefits of the NC technique. However, the existing NC-based multicast protocols cannot accurately determine the minimum number of coded packets that a FN should send in order to ensure successful data delivery to the destinations, so that many redundant packets are injected into the network, leading to performance degradation. In this paper, we propose HopCaster, a novel reliable multicast protocol that incorporates network coding with hop-by-hop transport. HopCaster completely eliminates the need for estimating the number of coded packets to be transmitted by a FN, and avoids redundant packet transmissions. It also effectively addresses the challenges of heterogeneous mulficast receivers. Moreover, a cross-layer multicast rate adaptation mechanism is proposed, which enables HopCaster to optimize multicast throughput by dynamically adjusting wireless transmission rate based on the changes in the receiver population and channel conditions during the course of mulficasting a coded data chunk. Our evaluations show that HopCaster significantly outperforms the existing NC-based multicast protocols.

关键词： Content distributionNetwork coding MulticastHop-by-hop transportRate adaptation

Frequent and prolonged nocturnal occupation of port areas by Yangtze finless porpoises (Neophocaena asiaeorientalis): Forced choice for feeding?

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Integrative Zoology 2015年第1期10卷 122-132页

作者： Zhitao WANG Tomonari AKAMATSU Zhigang MEI lijun dong Tomohito IMAIZUMI Kexiong WANG Ding WANG The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences Institute of Hydrobiology of the Chinese Academy of SciencesWuhanChina University of Chinese Academy of Sciences BeijingChina National Research Institute of Fisheries Engineering IbarakiJapan

During the Yangtze Freshwater Dolphin Expedition 2012,Yangtze finless porpoises(Neophocaena asiaeorientalis)were acoustically monitored in 9 port areas at *** 6566 min of nocturnal monitoring,porpoise sonar was detected for 488 min(7.43%of the total time).Of all 81 encounters,the longest echolocation span obtained was 102.9 min,suggesting frequent and prolonged porpoise occupation of the port areas.A combined total of 2091 click trains were recorded,with 129(6.2%)containing minimum inter-click intervals(ICIs)below 10 ms(termed a buzz).Buzzes with a decrease in ICIs and search and approach phases that resembled feeding echolocation signals accounted for 44.2%(N=52)of all *** with an increase in ICIs,suggesting a mirrored prey capture phase,accounted for 20.2%(N=26)and could reflect attempts to locate escaped prey because they were followed by approach-phase feeding *** evidence of porpoises fleeing the proximity of vessels was *** recordings indicating clusters of porpoises feeding near the port areas suggest a forced choice for feeding due to the relatively higher prey availability in the port areas compared to other areas in the Yangtze River that are probably overfished.

关键词： feeding behavior nocturnal passive acoustic monitoring port area prey availability

A developed ant colony algorithm for cancer molecular subtype classification to reveal the predictive biomarker in the renal cell carcinoma

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BIOCELL 2023年第3期47卷 555-567页

作者： ZEKUN XIN YUDAN MA WEIQIANG SONG HAO GAO lijun dong BAO ZHANG ZHILONG REN Urology Surgery Aerospace Central HospitalBeijing100049China Beijing University of Technology Beijing100081China Urology Surgery Hebei Petro China Central HospitalLangfang065000China

Background:Recently,researchers have been attracted in identifying the crucial genes related to cancer,which plays important role in cancer diagnosis and ***,in performing the cancer molecular subtype classification task from cancer gene expression data,it is challenging to obtain those significant genes due to the high dimensionality and high noise of ***,the existing methods always suffer from some issues such as premature ***:To address those problems,we propose a new ant colony optimization(ACO)algorithm called DACO to classify the cancer gene expression datasets,identifying the essential genes of different *** DACO,first,we propose the initial pheromone concentration based on the weight ranking vector to accelerate the convergence speed;then,a dynamic pheromone volatility factor is designed to prevent the algorithm from getting stuck in the local optimal solution;finally,the pheromone update rule in the Ant Colony System is employed to update the pheromone globally and *** demonstrate the performance of the proposed algorithm in classification,different existing approaches are compared with the proposed algorithm on eight high-dimensional cancer gene expression ***:The experiment results show that the proposed algorithm performs better than other effective methods in terms of classification accuracy and the number of feature *** can be used to address the classification problem ***,a renal cell carcinoma dataset is employed to reveal the biological significance of the proposed algorithm from a number of biological ***:The results demonstrate that CAPS may play a crucial role in the occurrence and development of renal clear cell carcinoma.

关键词： Classification Ant colony optimization Cancer gene expression Renal cell carcinoma dataset

First live sighting of Deraniyagala’s beaked whale(Mesoplodon hotaula)or ginkgo-toothed beaked whale(Mesoplodon ginkgodens)in the western Pacific(South China Sea)with preliminary data on coloration,natural markings,and surfacing patterns

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Integrative Zoology 2021年第4期16卷 451-461页

作者： Massimiliano ROSSO Mingli LIN Francesco CARUSO Mingming LIU lijun dong Anna BORRONI Wenzhi LIN Xiaoming TANG Alessandro BOCCONCELLI Songhai LI Marine Mammal and Marine Bioacoustics Laboratory Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanyaChina CIMA Research Foundation SavonaItaly Woods Hole Oceanographic Institution Applied Ocean Physics and EngineeringWoods HoleMassachusettsUSA

Beaked whales represent around 25%of known extant cetacean species,yet they are the least known of all marine *** of many Mesoplodon species has relied on examination of a few stranded ***,the ginkgo-toothed beaked whale(Mesoplodon ginkgodens)and Deraniyagala’s beaked whale(Mesoplodon hotaula)are among the least-known of beaked whale species,without confirmed sightings of living individuals to *** present a sighting of 3 free-ranging individuals of ***/hotaula whale from a dedicated marine mammal vessel survey carried out in the South China Sea in April and May *** data(301 photographs)from the sighting were compared to photos of fresh stranded ginkgo-toothed beaked whale and Deraniyagala’s beaked whale from both historical and unpublished *** found that free-ranging *** and *** individuals can be easily distinguished from other Mesoplodon species due to differences in melon and gape shapes and coloration ***,accurate at-sea differentiation of *** and *** may not be possible due to high similarity in both coloration and scarring *** addition to our photo-identification data,we collected what we believe to be the first preliminary descriptions of surfacing behavior and diving patterns of one of these ***,the presence of scars possibly caused by fishing gear or marine litter raises concerns about anthropogenic impacts and conservation of these poorly known species.

关键词： Deraniyagala’s beaked whale ginkgo-toothed beaked whale marine litter Mesoplodon South China Sea

Effects of residual stenosis on carotid artery after stent implantation: A numerical study

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Medicine in Novel Technology and Devices 2022年第1期13卷 40-48页

作者： Zhenmin Fan lijun dong Xiao Liu Yingying Zhang Nan Zhang Xia Ye Xiaoyan Deng School of Mechanical Engineering Jiangsu University of TechnologyChangzhouJiangsu213001China Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education School of Biological Science and Medical EngineeringBeihang UniversityBeijing100191China Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability National Research Center for Rehabilitation Technical AidsBeijing100176China Radiologic Department Beijing Anzhen HospitalCapital Medical UniversityBeijing100029China School of Mechanical Engineering Jiangsu University of TechnologyChangzhouJiangsuChina School of Biological Science and Medical Engineering Beihang UniversityBeijing100191China

Stent deployments with residual stenosis(RS)were linked to increased risk of in-stent restenosis and *** objective of the present work was to explore the underlying biomechanical mechanism(s)for adverse events with *** patient-specific carotid models with RS were constructed to investigate wall shear stress(WSS),velocity,relative residence time(RRT),and oscillating shear index(OSI)after stenting in the host *** results showed that stented artery accompanied by RS would result in evident vortex,stagnation and recirculation zone at the stenosis throat,where relatively more areas were at abnormal low level of TAWSS,high level of RRT and ***,effects of stenting with RS on velocity,WSS,RRT and OSI in host artery would be significantly enhanced by severe RS,long stent and common carotid artery(CCA)*** results indicated that stenting with RS might aggravate adverse flow around the stent and the other region without stent,leading to increased adverse events in ***,to obtain better poststenting outcomes,stenting with RS requires caution and careful consideration,especially for the host artery with a severe RS,long stent and some locations of stenting.

关键词： Residual stenosis Stent Carotid artery Hemodynamics Numerical study

3D object reconstruction by point coordinates of 2D line drawings

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Computer Aided Drafting,Design and Manufacturing 2013年第1期23卷 32-35页

作者： HAO Wuqiang dong lijun Institute of Mechanical Engineering Taiyuan University of Technology

It is a research subject in computer vision to 3D reconstruction of an object represented by a single 2D line drawing. Previous works on 3D reconstruction from 2D line drawings focus on objects with lines, plane, view, and so on. This paper mainly studies the 3D reconstruction from 2D line drawings. Besides, a new approach is proposed： it is that for the research of the point coordinates of 2D line drawings, so as to achieve the object reconstruction by the reconstruction of point coordinates. The reconstruction process includes：（1） the collection of point coordinates （X,Y） of 2D line drawings; （2） the derivation of mathematical formula about the reconstruction of the point of 2D line drawings, and calculating the corresponding point of the 3D coordinates; （3） the regeneration of 3D graphics with 3D points; （4） analyze error by the proportional of parallel of axonometric projection, in order to prove the accuracy of the method.

关键词： 2D line drawings point coordinates 3D reconstruction