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Community-based population monitoring for large baleen whales:the case study of Bryde’s whale in Beibu Gulf of China

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Integrative Zoology 2021年第4期16卷 626-635页

作者： Yaoyao zhang mo CHEN Mao CHEN Yi han Yujiang HAO Kexiong WANG Zhigang MEI Ding WANG Key Laboratory of Aquatic Biodiversity and Conservation Institute of HydrobiologyChinese Academy of SciencesWuhanHubeiChina University of Chinese Academy of Sciences BeijingChina Guangxi Beibu Gulf Marine Research Center Guangxi Academy of SciencesNanningGuangxiChina

Citizen science is a popular method for the long-term monitoring of the distribution of wild *** application of these methods in different species and environments still poses challenges,especially for aquatic *** this study,we investigated the distribution of the Bryde’s whale(Balaenoptera edeni)in the Beibu Gulf of China by using scientific boat-based surveys and citizen science approaches using 2 different methods of data ***,we built our mobile app(Whale Guard)and installed it on fishermen’s ***,we used a popular instant messaging app(WeChat)to create an online fisherman *** found that the mobile phone app collected far fewer reports(5 reports)than the online community group(42 reports,Pmore than one person,whereas Whale Guard reports were much lower(0,Pmonitoring of Bryde’s whales,and it has successfully overcome the challenges of data accessibility,accuracy,and *** study shows how to appropriately use citizen science in different community groups and community-based approaches make them useful for large baleen whale surveys.

关键词： Bryde’s whale citizen science distribution habitat use long-term monitoring

Determining the protective effects of Ma-Mu-Ran Antidiarrheal Capsules against acute DSS-induced enteritis using 16S rRNA gene sequencing and fecal metabolomics

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Chinese Journal of Natural Medicines 2022年第5期20卷 364-377页

作者： ZHENG Si-Li zhang Dong-Ning DU AN Yan-Fen HUANG Fang han Lin-Tao mo Guo-Yan Pharmacy Faculty Hubei University of Chinese MedicineWuhan 430065China College of Basic Medical Sciences Hubei University of Chinese MedicineWuhan 430065China Xinjiang Uygur Pharmaceutical Co. Ltd.UrumqiXinjiang 830026China

Ma-Mu-Ran Antidiarrheal Capsules(MMRAC)is traditional Chinese medicine that has been used to treat diarrhea caused by acute enteritis(AE)and bacillary dysentery in Xinjiang(China)for many ***,the potential therapeutic mechanism of MMRAC for AE and its regulatory mechanism on host metabolism is *** study used fecal metabolomics profiling with GC/MS and 16S rRNA gene sequencing analysis to explore the potential regulatory mechanisms of MMRAC on a dextran sulfate sodium salt(DSS)-induced mouse model of *** metabolomics-based analyses were performed to detect the differentially expressed metabolites and metabolic *** 16S rRNA gene sequencing analysis was used to assess the altered gut microbes at the genus level and for functional ***,Pearson correlation analysis was used to integrate differentially expressed metabolites and altered bacterial *** results revealed that six intestinal bacteria and seven metabolites mediated metabolic disorders(i.e.,metabolism of amino acid,carbohydrate,cofactors and vitamins,and lipid)in AE ***,ten altered microbes mediated the differential expression of eight metabolites and regulated these metabolisms after MMRAC ***,these findings demonstrate that AE is associated with metabolic disorders and microbial ***,we present that MMRAC exerts protective effects against AE by improving host metabolism through the intestinal flora.

关键词： Acute enteritis Ma-Mu-Ran Antidiarrheal Capsules 16S rRNA sequencing Fecal metabolomics Gut microbiota

Influence of substituting B_(2)O_(3) with Li_(2)O on the viscosity,structure and crystalline phase of low-reactivity mold flux

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International Journal of Minerals,Metallurgy and Materials 2023年第7期30卷 1320-1328页

作者： Rongzhen mo Xubin zhang Ying Ren Junjie Hu Lifeng zhang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Lecture at College of Materials Science and Engineering Chongqing UniversityChongqing 400030China School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China

The low-reactivity mold flux with low SiO_(2)content is considered suitable for the continuous casting of high-aluminum steel since it can significantly reduce the reaction between Al in steel and SiO_(2)in mold ***,the traditional low-reactivity mold flux still presents some problems such as high viscosity and strong crystallization *** this study,the co-addition of Li_(2)O and B_(2)O_(3)in CaO–Al_(2)O_(3)–10wt%Si O_(2)based low-reactivity mold flux was proposed to improve properties of mold flux for high-aluminum steel,and the effect of Li_(2)O replacing B_(2)O_(3)on properties of mold flux was *** viscosity of the mold flux with 2wt%Li_(2)O and 6wt%B_(2)O_(3)reached a minimum value of 0.07 Pa·*** break temperature and melting point showed a similar trend with the ***,the melt structure and precipitation of the crystalline phase were studied using Raman and X-ray diffraction spectra to better understand the evolution of *** demonstrated that with increasing Li_(2)O content in the mold flux from 0 to 6 wt%,the degree of polymerization of aluminate and the aluminosilicate network structure increased because of increasing Li+released by Li_(2)O,indicating the added Li_(2)O was preferentially associated with Al^(3+)as a charge *** precipitation of LiAlO_(2)crystalline phase gradually increased with the replacement of B_(2)O_(3)by Li_(2)***,Li_(2)O content should be controlled below 2wt%to avoid LiAlO_(2)precipitation,which was harmful to the continuous casting of highaluminum steels.

关键词： low-reactivity mold flux viscosity structure crystalline phase

颗粒物沉降影响下草/藻型湖区沉积物一水界面氮交换特征及机制

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湖泊科学 2025年第1期37卷 76-88页

作者：韩汶轩陈秋羽何煦谭立贤刘成张雷中国科学院南京地理与湖泊所湖泊与环境国家重点实验室南京211135 中国科学院大学北京100049 广西大学资源环境与材料学院南宁530004

富营养化湖泊水体中颗粒物的不断富集和沉降加剧了沉积物内源负荷。本文以太湖典型草、藻型湖区为研究对象,开展了为期一年的野外月度调查,分析了两种湖区水样、颗粒物和沉积物中各形态氮含量、赋存形式及其沉积物水界面交换特征,研究... 详细信息

富营养化湖泊水体中颗粒物的不断富集和沉降加剧了沉积物内源负荷。本文以太湖典型草、藻型湖区为研究对象,开展了为期一年的野外月度调查,分析了两种湖区水样、颗粒物和沉积物中各形态氮含量、赋存形式及其沉积物水界面交换特征,研究了颗粒物沉降对草、藻型湖区沉积物水界面氮赋存形态转变及迁移的影响。结果表明,草、藻型湖区水体总氮(TN)浓度年变化范围分别为0.50~1.51 mg/L(均值为(0.97±0.23)mg/L)和1.77~6.12 mg/L(均值为(3.67±1.36)mg/L),藻型湖区水体各形态氮浓度普遍高于草型湖区,且季节性变化更加显著。草、藻型湖区悬浮颗粒物中TN含量年均值分别为(6998.48±1413.87)和(5162.63±2205.13)mg/kg,沉积物TN平均含量分别为(4219.75±216.62)和(3187.88±103.07)mg/kg,呈现草型湖区显著高于藻型湖区、悬浮颗粒物显著高于沉积物的特征。氨氮(NH 3-N)是两个湖区悬浮颗粒物和沉积物中有效态氮的主要赋存形式,藻型湖区沉积物中NH 3-N的释放主要集中在夏季,而草型湖区则以夏、秋季为主。有效态氮高度富集的颗粒物不断沉降是造成沉积物中氮含量改变的重要原因,且藻型湖区有效态氮所占比例(5.17%)在藻类水华季节高于草型湖区(4.34%)。草型系统向藻型系统的转变可能会升高水体颗粒物浓度并加剧沉积物颗粒再悬浮过程,颗粒物沉降和再悬浮交替加剧了沉积物水界面处氮的交换过程,在未来的湖泊内源氮管理中应更加重视颗粒物的作用。

关键词：太湖草型湖区藻型湖区悬浮颗粒物内源氮负荷

Finsler warped product metrics with special Riemannian curvature properties

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Science China Mathematics 2020年第7期63卷 1391-1408页

作者： Huaifu Liu Xiaohuan mo Hongzhen zhang College of Applied Sciences Beijing University of TechnologyBeijing 100124China Key Laboratory of Pure and Applied Mathematics School of Mathematical SciencesPeking UniversityBeijing 100871China

One of the fundamental problems in Finsler geometry is to study Finsler metrics of constant(or scalar)*** this paper,we refine and improve Chen-Shen-Zhao equations characterizing Finsler warped product metrics of scalar flag *** particular,we find equations that characterize Finsler warped product metrics of constant flag *** we improve the Chen-Shen-Zhao result on characterizing Einstein Finsler warped product *** its application we construct explicitly many new warped product Douglas metrics of constant Ricci curvature by using known locally projectively flat spherically symmetric metrics of constant flag curvature.

关键词： Finsler metric warped product flag curvature Einstein metric spherically symmetric metric

Performance of Ti6Al4V fabricated by electron beam and laser hybrid preheating and selective melting strategy

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China Foundry 2021年第4期18卷 351-359页

作者： mo-han Hao Lei zhang Bin Zhou Hong-xin Li Ming-zhi Li Feng Lin Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China

Electron beam selective melting(EBM)and selective laser melting(SLM)are regarded as significant manufacturing processes for near-net-shaped Ti6Al4V ***,in the conventional EBM process,preheating is necessitated to avoid"smoke"caused by the charging of *** the conventional SLM process,laser as an energy source without the risk of"smoke"can be employed to melt metal powder at low ***,because of the low absorption rate of laser,the powder bed temperature cannot reach a high *** is difficult to obtain as-built TiAl4V with favorable comprehensive properties via conventional EBM or ***,two types of electron beam and laser hybrid preheating(EB-LHP)combined with selective melting strategies are *** laser to preheat powder allows EBM to be performed at a low powder bed temperature(EBM-LT),whereas using an electron beam to preheat powder allows SLM to be performed at a high powder bed temperature(SLM-HT).Ti6Al4V samples are fabricated using two different manufacturing strategies(i.e.,EBM-LT and SLM-HT)and two conventional processes,i.e.,EBM at a high powder bed temperature(EBM-HT)and SLM at a low powder bed temperature(SLM-LT).The temperature-dependent surface quality,microstructure,density,and mechanical properties of the as-built Ti6Al4V samples are characterized and *** show that EBM-LT Ti6Al4V exhibits a higher ultimate tensile strength(981±43 MPa)and a lower elongation(12.2%±2.3%)than EBM-HT Ti6Al4V owing to the presence ofα′*** SLM-HT Ti6Al4V possesses the highest ultimate tensile strength(1,059±62 MPa)and an elongation(14.8%±4.0%)comparable to that of the EBM-HT Ti6Al4V(16.6%±1.2%).

关键词： Ti6Al4V electron beam selective melting selective laser melting hybrid preheating

Analysis of the energy-minimization multiscale model with multiobjective optimization

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Particuology 2020年第1期18卷 109-115页

作者： Yi mo Mengjie Du Wei Ge Pingwen zhang School of Mathematical Sciences Peking UniversityBeijing 100871China State Key Laboratory of Multi-phase Complex Systems(MPCS) Institute of Processing Engineering(IPE)Chinese Academy of Sciences(CAS)Beijing 100190China School of Chemical Engineering University of the Chinese Academy of Sciences(UCAS)Beijing 100049China

Gas-solid two-phase flow is ubiquitous in nature and many engineering fields,such as chemical engineering,energy,and *** closure of its hydrodynamic model is difficult owing to the complex multiscale structure of such *** address this problem,the energy-minimization multi-scale(EMMS)model introduces a stability condition that presents a compromise of the different dominant mechanisms involved in the systems,each expressed as an extremum ***,in the physical system,each dominant mechanism should be expressed to a certain extent,and this has been formulated as a multiobjective optimization problem according to the EMMS principle generalized from the EMMS *** mathematical properties and physical meanings of this multiobjective optimization problem have not yet been *** paper presents a numerical solution of this multiobjective optimization problem and discusses the correspondence between the solution characteristics and flow regimes in gas-solid *** suggests that,while the most probable flow structures may correspond to the stable states predicted by the EMMS model,the noninferior solutions are in qualitative agreement with the observable flow structures under corresponding *** demonstrates that both the dominant mechanisms and stability condition proposed for the EMMS model are physically reasonable and consistent,suggesting a general approach of describing complex systems with multiple dominant mechanisms.

关键词： Energy-minimization multi-scale model Multiobjective optimization Flow regime transition

Reinforcement Learning Behavioral Control for Nonlinear Autonomous System

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IEEE/CAA Journal of Automatica Sinica 2022年第9期9卷 1561-1573页

作者： Zhenyi zhang Zhibin mo Yutao Chen Jie Huang the College of Electrical Engineering and Automation Fuzhou UniversityFuzhou 350108 the Key Laboratory of Industrial Automation Control Technology and Information Processing Education Department of Fujian ProvinceFuzhou 350108 G+Industrial Internet Institute Fuzhou UniversityFuzhou 350108China

Behavior-based autonomous systems rely on human intelligence to resolve multi-mission conflicts by designing mission priority rules and nonlinear *** this work,a novel twolayer reinforcement learning behavioral control(RLBC)method is proposed to reduce such dependence by trial-and-error ***,in the upper layer,a reinforcement learning mission supervisor(RLMS)is designed to learn the optimal mission *** with existing mission supervisors,the RLMS improves the dynamic performance of mission priority adjustment by maximizing cumulative rewards and reducing hardware storage demand when using neural *** the lower layer,a reinforcement learning controller(RLC)is designed to learn the optimal control *** with existing behavioral controllers,the RLC reduces the control cost of mission priority adjustment by balancing control performance and *** error signals are proved to be semi-globally uniformly ultimately bounded(SGUUB).Simulation results show that the number of mission priority adjustment and the control cost are significantly reduced compared to some existing mission supervisors and behavioral controllers,respectively.

关键词： Behavioral control mission supervisor nonlinear autonomous system reinforcement learning

A double sideband combined tracking method for Galileo E5 AltBOC signals

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Satellite Navigation 2023年第3期4卷 185-197页

作者： Tongwen Fan Tisheng zhang Hongping zhang Jun mo Xiaoji Niu GNSS Research Center Wuhan UniversityWuhan 430072China GLOBSKY Technology Inc. San JoseCAUSA Hubei Luojia Laboratory Wuhan 430072China

The Galileo navigation satellite system(Galileo)E5 Alternative Binary Offset Carrier(AltBOC)signal brings various challenges due to its complex modulation,wide bandwidth,and multi-peaked auto-correlation *** wideband tracking needs to solve the ambiguity problem and design dedicated baseband channels,the single-sideband cannot have the outstanding performance of the AltBOC *** propose a new tracking method called“Double Sideband Combined Tracking”(DSCT),which can fully exploit the AltBOC signal’s code tracking accuracy without ambiguity and ensure compatibility with Binary Phase Shift Keying(BPSK)processing channels,easily implemented in *** DSCT employs one phase locked loop and one delay locked loop to track the carrier and code,*** double-sideband correlation results used by the two loops are recovered by coherently combining the singlesideband correlation results of the two BPSK ***,the combined model,the loop discriminator,and the ambiguity detection of the DSCT are ***,the code tracking error caused by thermal noise is modeled and *** test results based on real Galileo E5 signals show that the DSCT exhibits better or comparable code tracking accuracy to the AltBOC wideband tracking *** the loop falsely locks onto a sidepeak,the DSCT can quickly detect and re-lock on the main peak.

关键词： Galileo E5 Alternative binary offset carrier Tracking loop Unambiguous tracking Double-sideband tracking