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基于图像处理和AIS数据的船舶异常行为报警系统

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舰船科学技术 2024年第1期46卷 176-179页

作者：李锋赵仓龙汤丽丽江苏航运职业技术学院江苏南通226010

船舶数量增多在很大程度上影响着船舶航行的安全性,需要对其他船舶的异常行为进行判断并发出预警。单纯依靠AIS数据去判断船舶异常行为,存在数据准确度不高和信息滞后等问题。本文提出结合图像处理技术和AIS数据来对船舶异常行为进行综... 详细信息

船舶数量增多在很大程度上影响着船舶航行的安全性,需要对其他船舶的异常行为进行判断并发出预警。单纯依靠AIS数据去判断船舶异常行为,存在数据准确度不高和信息滞后等问题。本文提出结合图像处理技术和AIS数据来对船舶异常行为进行综合判断,使用YOLO V3对获取的监控图像进行处理,对船舶目标进行有效识别,使用DBSCAN算法对船舶航迹进行聚类仿真,进而判断船舶的异常行为。最后将获取的图像目标识别、航迹聚类结果和异常行为规则库进行比较,实现对船舶异常行为的检测和报警。

关键词： AIS数据图像处理 YOLO V3 异常行为报警系统

Free Cu^(2+) Ions,Cu Fractionation and Microbial Parameters in Soils from Apple Orchards Following long-Term Application of Copper Fungicides

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Pedosphere 2011年第2期21卷 139-145页

作者： ZHOU Dong-Mei WANG Quan-Ying cang long State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008(China) Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy ofSciences Changchun 130012 (China)

Soil samples were collected from apple orchards 5,15,20,30,and 45 years old,and one adjacent forest soil was used as reference to investigate the free Cu2+ion activity in soil solution and the soil Cu fractionation in the solid phase following long-term application of copper fungicide,Bordeaux mixture,in apple orchards and to investigate the relationships among soil free Cu2+ions,Cu fractionation and soil microbial *** total Cu concentration in the orchard soils varied from 21.8 to 141 mg kg-1,increasing with the orchard age,and the value for the reference soil was 12.5 mg *** free Cu2+ion concentrations in the soil solutions extracted by 0.01 mol L-1 KNO3 ranged from 3.13×10-8(reference)to 4.08×10-6 mol L-1(45 years-old orchard).The concentration of Cu complexed in the fulvic fraction increased with orchard age from 5.16 to 52.5 mg *** was also the case for other soil Cu fractions except the residual *** residual soil Cu remained practically constant,ranging from 4.28 to 5.66 mg kg-1,suggesting that anthropogenic soil Cu mainly existed in the more labile active *** analyses revealed that both the free Cu2+ions in the soil solution and the humic acid-complexed Cu fraction in the solid phase were strongly related with soil microbial parameters.

关键词： free metal activity fulvic acid-complexed Cu humic acid-complexed Cu orchard soil residual Cu

Bioavailability of Soil Copper from Different Sources:Integrating Chemical Approaches with Biological Indicators

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Pedosphere 2014年第1期24卷 145-152页

作者： WANG Quan-Ying ZHOU Dong-Mei cang long Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of Sciences Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of Sciences

Bioavailability is a key parameter in assessing contaminant transfer to biota. However, the input patterns and soil use types may impact the metal bioavailability. Several soil parameters were measured including chemical properties, such as pH, organic C, and Cu solution/solid speciation, and biological properties, such as soil microbial biomass C （SMBC）, seed germination, and root elongation, to evaluate the bioavailability of Cu contaminated soils from three different sources, i.e., non-ferrous metal mining, Cu-based fungicides, and Cu-smelting. The results revealed that free Cu2＋ ion in soil solution and the ratios of Cu fractions to total Cu content in the solid phase could not be used to predict total Cu content in soils. The indexes of seed germination and root elongation appeared not to be good biomonitors of Cu contamination in soils, which were more sensitive to soil pH and soil organic carbon （SOC）. Relationships between SMBC and soil Cu forms or the ratio of SMBC/SOC and soil Cu forms showed that free Cu2＋ ion and humie acid-complexed Cu could significantly inhibit soil microbial activities. Our findings suggested that both metal chemical forms and biological bioassays should be considered as a complementary technique rather than an alternative to evaluate the metal bioavailability from different pollution sources.

关键词： Cu contamination Cu fractionation free Cu2+ ion metal bioavailability soil microbial biomass C

生物可降解螯合剂GLDA强化电动治理镉铅砷复合污染土壤研究

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安全与环境学报 2024年第1期24卷 322-329页

作者：陈春发王凡侯建国冯宏亮仓龙泮芝伟中化地质矿山总局浙江地质勘查院杭州310002 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所) 南京210008

以镉铅砷复合污染土壤为研究对象,将生物可降解络合剂谷氨酸二乙酸四钠[tetrasodium N, N-bis(carboxymethyl)glutamic acid, GLDA]应用于电动治理技术,同时结合投加方式和阴极pH值控制技术,以研究电动治理对土壤中不同重金属的同步去... 详细信息

以镉铅砷复合污染土壤为研究对象,将生物可降解络合剂谷氨酸二乙酸四钠[tetrasodium N, N-bis(carboxymethyl)glutamic acid, GLDA]应用于电动治理技术,同时结合投加方式和阴极pH值控制技术,以研究电动治理对土壤中不同重金属的同步去除效率并探讨其去除机制。结果显示:(1)GLDA明显提高了土壤溶液中重金属的质量浓度,有利于土壤重金属在电场作用下移出土体;(2)阳极投加GLDA有利于As的去除,土壤As总去除率可达60.7%,但土壤环境过碱时不利于Cd和Pb的移除;(3)阴极投加GLDA结合pH值控制处理中Cd和Pb的总去除率分别可达35.9%和23.7%,在所有处理中最高,且As的去除率(42.3%)也仅低于阳极投加GLDA处理,是一种较优的同步去除Cd、Pb和As的方法;(4)电动处理后土壤pH值和电导率依处理不同会发生较大变化,总体趋势为阳极附近土壤pH值低于阴极附近,且土壤电导率普遍升高。研究结果为GLDA在重金属复合污染土壤电动治理中的应用提供了理论基础和技术支持。

关键词：环境工程学电动治理谷氨酸二乙酸四钠(GLDA) 镉铅砷

不同回灌条件下通辽市科尔沁区的地下水位响应研究

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水电能源科学 2024年第7期42卷 30-34页

作者：刘圣昱束龙仓澈丽木格张彤豪刘波河海大学水文水资源学院江苏南京210098 河海大学水灾害防御全国重点实验室江苏南京210098 通辽市水利事业发展中心内蒙古通辽028000

随着社会经济的发展,为满足农业生产需求,科尔沁区内的开采井规模及数量不断扩大增加,造成区内地下水超采严重,地下水位持续下降,严重制约着当地的发展。为此,参考地下水位下降较严重区域位置、水系分布、引水工程的引水量及单井的回灌... 详细信息

随着社会经济的发展,为满足农业生产需求,科尔沁区内的开采井规模及数量不断扩大增加,造成区内地下水超采严重,地下水位持续下降,严重制约着当地的发展。为此,参考地下水位下降较严重区域位置、水系分布、引水工程的引水量及单井的回灌能力等条件,选取河道、回灌井、河道回灌井结合的回灌方式,设计不同降水条件下的9种回灌方案(s1~s9),利用FEFLOW软件建立相应的地下水流数值模型,并模拟不同的回灌方案,分析各方案下地下水位的响应情况。结果表明,丰水年条件下,方案s3的地下水位平均抬升值最大,地下水位的恢复效果最好,而方案s2的单位回灌量最小,回灌效率最高,其次为方案s3,平水年与枯水年条件下结果类似。研究结果可为当地的地下水位恢复和地下水资源的合理开发利用提供重要参考。

关键词：地下水人工回灌地下水位数值模型科尔沁区 FEFLOW

GLDA及其组合试剂对土壤中As、Cd、Cu和Pb的提取能力和机制

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土壤 2024年第4期56卷 841-848页

作者：陈春发泮芝伟侯建国冯宏亮仓龙王玉军中化地质矿山总局浙江地质勘查院杭州310000 土壤与农业可持续发展重点实验室(中国科学院) 南京211135

以重金属复合污染土壤为研究对象,将谷氨酸二乙酸四钠(GLDA)和其他生物可降解络合剂进行组合,研究了单一和组合试剂对土壤中不同重金属的提取效率和影响机制。结果表明:随着试剂与土壤重金属摩尔比的增加,重金属的提取率逐渐增加,最优... 详细信息

以重金属复合污染土壤为研究对象,将谷氨酸二乙酸四钠(GLDA)和其他生物可降解络合剂进行组合,研究了单一和组合试剂对土壤中不同重金属的提取效率和影响机制。结果表明:随着试剂与土壤重金属摩尔比的增加,重金属的提取率逐渐增加,最优摩尔比为5∶1;草酸(OA)对As、柠檬酸(CA)对Cu的提取能力高于乙二胺四乙酸二钠(EDTA)对As和Cu的提取能力;GLDA在偏酸的条件下对各种重金属的提取能力均较高;通过不同试剂的组合,GLDA和OA在摩尔比为1∶1时对土壤中As、Cu和Pb的提取能力最强,分别为52.4%、75.0%和89.8%,各重金属元素提取能力顺序为Pb>Cu≈Cd>As。而GLDA和CA在摩尔比为5∶1时对土壤中Cd的提取能力最强,为95.7%。提取前后的土壤重金属形态分级表明,GLDA+OA(1∶1)组合试剂降低了绝大多数形态的重金属含量,减少了易迁移和易被生物吸收的弱结合态重金属含量。

关键词：谷氨酸二乙酸四钠生物可降解络合剂 As Cd Cu Pb

Simulation of inclined dendrites under natural convection by KKS phase field model based on CUDA

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中国铸造:英文版 2023年第5期20卷 432-442页

作者： Chang-sheng Zhu Tian-yu Li Bo-rui Zhao cang-long Wang Zi-hao Gao College of Computer and Communication Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Gansu Advanced Processing and Recycling of Non-Ferrous Metal Lanzhou University of TechnologyLanzhou 730050China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516000GuangdongChina

In this work,Al-4.5wt.%Cu was selected as the research object,and a phase field-lattice Boltzmann method(PF-LBM)model based on compute unified device architecture(CUDA)was established to solve the problem of low serial computing efficiency of a traditional CPU and achieve significant *** model was used to explore the evolution of dendrite growth under natural *** the study of the tip velocities,it is found that the growth of the dendrite arms at the bottom is inhibited while the growth of the dendrite arms at the top is promoted by natural *** addition,research on the inclined dendrite under natural convection was *** is observed that there is a deviation between the actual growth direction and the preferred angle of the inclined *** the increase of the preferred angle of the seed,the difference between the actual growth direction and the initial preferred angle of the inclined dendrite shows a trend of increasing at first and then *** the simulation area,the relative deflection directions of the primary dendrite arms in the top right corner and the bottom left corner of the same dendrite are almost counterclockwise,while the relative deflection directions of the other two primary dendrite arms are clockwise.

关键词： PF-LBM natural convection inclined dendrites CUDA

Nonlinear Waves in Two-Dimensional (2D) Square Lattice Frenkel-Kontorova (FK) System

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Communications in Theoretical Physics 2009年第1期51卷 90-96页

作者： WANG cang-long HAN Jiu-Ning GAO Xiu-Yun DUAN Wen-Shant Department of Physics Northwest Normal University Lanzhou 730070 China

A 2D square lattice is studied. By using the continuum approximation, we set up the differential equations of motion for an arbitrary particle in the square lattice which subjects to an external periodic substrate potential. The exact solitary waves of the system are found for special cases. We conclude that the adhesive force f and the angle between propagation directions of upper and lower layers can affect these waves.

关键词： FK model square lattice solitary waves

Amplitude Oscillations of the Resonant Phenomena in a Frenkel-Kontorova Model with an Incommensurate Structure

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Chinese Physics Letters 2012年第6期29卷 68-71页

作者： YAN Yan-Zong WANG cang-long SHAO Zhi-Gang YANG Lei College of Mathematics and Statistics Longdong UniversityQingyang 745000 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 College of Physics and Electronic Engineering and Joint Laboratory of Atomic and Molecular Physics of NWNU&IMP CAS Northwest Normal UniversityLanzhou 730070 Laboratary of Quantum Information Technology Institute of Condensed Matter PhysicsSchool of Physics and Telecommunication EngineeringSouth China Normal UniversityGuangzhou 510006 Department of Physics Lanzhou UniversityLanzhou 730000

Dynamical mode locking phenomena in incommensurate structures of the dc- and ac-driven overdamped FrenkelKontorova model are studied by molecular-dynamics *** is found that the Shapiro steps exhibit significantly different amplitude and frequency dependences from the ones observed in the commensurate *** step widths still oscillate with the amplitude,but the form is no longer Bessel-like,i.e.,the anomaly appears in our *** same type of anomalies is also exhibited by the critical depinning *** oscillatory behavior and the anomalies are also revealed in the ((F),Fac) phase diagram where three phases are *** oscillations are directly correlated with the existence and the stability of interference phenomena in real systems.

关键词： force steps commensurate