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Observation and simulation of the diffuse attenuation coefficient of downwelling irradiance in the Polar Ocean

Science China Earth Sciences 2023年第7期66卷 1535-1546页

作者： Weibo WANG chunsheng jing Xiaogang GUO Ocean Dynamic Laboratory Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China Fujian Provincial Key Laboratory of Marine Physical and Geological Processes Xiamen 361005China

The three-stream radiation transfer model is used to investigate the fluctuation in the underwater diffuse attenuation coefficient of downwelling irradiance in the polar ocean with a high solar zenith angle and different direct radiation proportions.First,the applicability of the three-stream radiation model in the polar region is validated by using 18 in situ observation data from September to October 2009 in the Beaufort Sea.Statistics show that in the absence of sea ice,the average relative errors between the simulation and observation values for 490 nm downwelling irradiance (E_(d)(490)) and its diffuse attenuation coefficient (K_(d)(490)) are 7.04%and 9.88%,respectively.At the stations surrounded by sea ice,the radiation is relatively small due to ice blocking,and the average relative errors simulated by the model reach 15.89%and 15.55%,respectively.Second,simulations with different chlorophyll concentrations and different proportions of direct radiation reveal that a high solar zenith angle has a greater impact on K_(d)(490) in the surface water.K_(d)(490) is less affected by the light field (affected by the solar zenith angle and the proportion of direct radiation) at depths greater than 30 m,and meets the linear relationship with the inherent optical parameters(the sum of the absorption coefficient and backscattering coefficient).The surface K_(d)(490) is still consistent with that at a depth of more than 50 meters under a high solar zenith angle,implying that the surface K_(d)(490) can also be considered as an inherent optical parameter at a high solar zenith angle (greater than 60 degrees).The relative error of obtaining surface K_(d)(490) by using the linear relationship at the 50 m layer is found to be less than 8%in the seawater with chlorophyll concentration greater than0.05 mg m^(-3).The effect of the solar zenith angle and proportion of direct radiation can be ignored when measuring the diffuse attenuation coefficient in the polar region.Finally,the model can correct the ice-induced fluctuation in

关键词： “three-stream”radiation transfer model Diffuse attenuation coefficient Solar zenith angle Proportion of direct radiation Polar ocean

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Establishment of enzyme-linked immunosorbent assay for beef and lamb contents in cooked meat

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未来食品学报(英文) 2024年第1期4卷 91-96页

作者： Yujing Li jingjing Liu Sufang Fan Li Zhao jing Zhang Erjing Zhang Ziran Li Yan Zhang chunsheng Li Hebei Jiaotong Vocational and Technical College Shijiazhuang 050035China Biology Institute of Hebei Academy of Sciences Shijiazhuang 050081China Hebei Food Safety Key Labratory Key Laboratory of Special Food Supenvision Technolog for State Market RegpulationHebei Engineering Research Center for Special Food Sagfery and HealthHebei Food Inspection cand Research InstinuteShijiazhuang 050227China College ofLife Sciences Hebei Normal UniversinyShijiazhuang 050024China Julu County Applied Technology Research Instinute Jultu 055250China

In this study,an enzyme 1linked immunosorbent assay(ELISA)was established to detect beef and 1amb components,and its performance was tested.Double-antibody sandwich ELISA was adopted and determined a coating concentration of capture antibody 3G5 of 1:4000,a working concentration of enzyme-labeled antibody 2E7-horseradish peroxidase(HRP)of 1:1000,a sample incubation time of 60 min and a detection antibody reaction time of 60 min.The specificity,sensitivity,repeatability and stability of this assay were detemmined.The limit of detection for beef and 1amb skeleta1 muscle troponin I was 45 mg/kg,the inter-assay and intra-assay recovery rates ranged from 80.4%to 115.7%,the coefficients of variation were below 13.6%,and the cIoss reaction rates of the tissue components of chicken,duck and fish were below 13.4%.The sandwich ELISA method established in this study is stable and has high accuracy.The test results were consistent with the polymerase chain reaction(PCR)method at 50 and 100 g/kg-Therefore,this ELISA method can be used to quantitatively detect beef and 1amb components in meat products.

关键词： Double antibody sandwich enzyme-1inked immunosorbent assay(ELISA) Beef components Lamb components

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Intra-seasonal variability of the abyssal currents in COMRA's contract area in the Clarion-Clipperton Zone

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Acta Oceanologica Sinica 2022年第11期41卷 1-11页

作者： Fangfang Kuang jing Cha Junpeng Zhang Aijun Pan Hangyu Chen Xiwu Zhou chunsheng jing Xiaogang Guo Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China

In this paper,the intra-seasonal variability of the abyssal currents in the China Ocean Mineral Resources Association(COMRA)polymetallic nodule contact area,located in the western part of the Clarion and Clipperton Fraction Zone in the tropical East Pacific,is investigated using direct observations from subsurface mooring instruments as well as sea-surface height data and reanalysis products.Mooring observations were conducted from September 13,2017 to August 15,2018 in the COMRA contact area(10°N,154°W).The results were as follows:(1)At depths below 200 m,the kinetic energy of intra-seasonal variability(20-100 d)accounts for more than 40%of the overall low-frequency variability,while the ratio reaches more than 50%below 2000 m.(2)At depths below 200 m,currents show a synchronous oscillation with a characteristic time scale of 30 d,lasting from October to the following January;the energy of the 30-d oscillation increases with depth until the layer of approximately 4616 m,and the maximum velocity is approximately 10 cm/s.(3)The 30-d oscillation of deep currents is correlated with the tropical instability waves in the upper ocean.

关键词： intra-seasonal variability abyssal currents Clarion-Clipperton Zone tropical instability waves

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Health Assessment of Typical Reservoirs in Eastern Jilin: A Case Study of Niligou Reservoir

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Asian Agricultural Research 2024年第1期16卷 17-21页

作者： Meihua HUANG jing WANG Yinglin XIE chunsheng WEI Xin TIAN Lunwen WANG Jilin Provincial Bureau of Hydrology and Water Resources(Jilin Provincial Water Environment Monitoring Center) Changchun 130022China Changchun Xinlicheng Reservoir Management Center Changchun 130000China

Niligou Reservoir,a typical reservoir in the eastern region of Jilin Province,is subordinate to Niligou River,which is located in the Changbai Mountains in eastern Jilin,with abundant plant and animal resources and well protected biodiversity in the basin,but there are also some related problems such as fragile ecosystem of forest wetland.This paper carried out a health assessment of Niligou River,including water quality monitoring,aquatic organism monitoring,and riparian zone investigation.According to the requirements of the Technical Guidelines for River and Lake Health Assessment,13 assessment indexes were selected to build a river and lake health assessment index system.By sorting and analyzing the monitoring and investigation data,we got a clear picture of the ecological environment status and existing problems of Niligou Res-ervoir.Based on the actual situation of Niligou River,we evaluated the hydrologic integrity,chemical integrity,morphological and structural integrity,biological integrity and sustainability of social service function,and put forward corresponding countermeasures according to the re-sults,in order to provide a technical support for the health treatment of rivers and lakes in Jilin Province.

关键词： Eastern Jilin Niligou Reservoir Health assessment

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Three-dimensional thermohaline anomaly structures of rings in the Kuroshio Extension region

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Acta Oceanologica Sinica 2020年第3期39卷 25-35页

作者： Ya’nan Ding chunsheng jing Third Institute of Oceanography Ministry of Nature ResourcesXiamen 361005China

Using AVISO satellite altimeter observations during 1993–2015 and a manual eddy detection method, a total of 276 anticyclonic rings and 242 cyclonic rings shed from the Kuroshio Extension(KE) were identified, and their three-dimensional(3D) anomaly structures were further reconstructd based on the Argo float data and the Japan Agency for Marine-Earth Science and Technology(JAMSTEC) cruise and buoy data through an interpolation method. It is found that the cyclonic(anticyclonic) rings presented consistent negative(positive) anomalies of potential temperature;meanwhile the relevant maximum anomaly center became increasingly shallow for the cyclonic rings whereas it went deeper for the anticyclonic rings as the potential temperature anomaly decreased from the west to the east. The above deepening or shoaling trend is associated with the zonal change of the depth of the main thermocline. Moreover, the composite cold ring between 140° and 150°E was found to exhibit a double-core vertical structure due to the existence of mode water with low potential vorticity. Specifically, a relatively large negative(positive) salinity anomaly and a small positive(negative) one appeared for the composite cyclonic(anticyclonic) ring at the depth above and below 600 m, respectively. The underlying driving force for the temperature and salinity anomaly of the composite rings was also attempted, which varies depending on the intensity of the background current and the temperature and salinity fields in different areas of the KE region, and the rings’ influences on the temperature and salinity could reach deeper than 1 000 m on average.

关键词： Kuroshio Extension pinched-off ring thermohaline anomaly three-dimensional structure composite eddy

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Spatial-temporal Variation Characteristics of Water Quality in the Lower Reaches of the Nenjiang River

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Meteorological and Environmental Research 2024年第1期15卷 67-71页

作者： Xiangzhe MENG jing WANG Yinglin XIE Fei PENG chunsheng WEI Xin TIAN Lunwen WANG Jilin Bureau of Hydrology and Water Resources(Jilin Water Environment Monitoring Center) Changchun 130022China Information Center of Songliao Basin Committee of the Ministry of Water Resources Changchun 130022China Changchun Xinlicheng Reservoir Management Center Changchun 130000China

As an important river in the western part of Jilin Province,the lower reach of the Nenjiang River is an important wetland water source conservation area in Jilin Province.Within the watershed,it governs the Momoge Wetland,the Xianghai Wetland,and the Danjiang Wetland in Jilin Province.The main problem in the lower reaches of the Nenjiang River is the uneven distribution of water resources in time and space,and the intensification of land salinization.Zhenlai County and Da an City in the Nenjiang River Basin have sufficient surface water resources,with surface water as the drinking water source.Baicheng City and Tongyu County have scarce surface water resources,and both use groundwater as their domestic water source.The main polluted section in the basin is the Xianghai Reservoir,and the annual water quality evaluation is Class V.However,the water quality of the Tao er River,the main stream of the Nenjiang River,is significantly better than that of the Xianghai Reservoir.In order to better study the water environmental pollution situation in the Nenjiang River basin,monitoring data from five sections of non seasonal rivers in the basin from 2012 to 2021 were selected for studying water quality.This in-depth exploration of the water pollution status and river water quality change trends in the Nenjiang River basin is of great significance for future rural development,agricultural pattern transformation,and the promotion of water ecological civilization construction.

关键词： Lower reaches of the Nenjiang River Water quality Spatial-temporal variation

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面向物联网多场景的PBFT共识算法改进方案

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计算机应用研究 2024年第3期41卷 676-682,687页

作者：戚文杰史培中古春生景征骏江苏理工学院计算机工程学院江苏常州213001

物联网与区块链融合过程中,实用拜占庭容错(PBFT)算法存在通信开销大、时延高且无法根据场景与设备差异进行合理划分的不足。为满足物联网多场景应用的问题,提出了一种基于综合评价的改进实用拜占庭容错算法。首先,对节点进行基于性能... 详细信息

物联网与区块链融合过程中,实用拜占庭容错(PBFT)算法存在通信开销大、时延高且无法根据场景与设备差异进行合理划分的不足。为满足物联网多场景应用的问题,提出了一种基于综合评价的改进实用拜占庭容错算法。首先,对节点进行基于性能与信誉值加权的综合评价筛选出符合特定场景需求的节点;然后,进行基于节点综合评价的聚类,形成双层网络架构;最后,将共识过程分为子集群共识和主集群共识。实验结果表明,CE-PBFT拥有较高的容错性和场景适应性,且当场景节点数达到100时,在通信开销和共识时延方面较PBFT分别有着93.9%和87.8%的性能优化。

关键词：物联网区块链实用拜占庭容错多场景综合评价

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Estimate of contribution of near-inertial waves to the velocity shear in the Bay of Bengal based on mooring observations from2013 to 2014

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Acta Oceanologica Sinica 2021年第11期40卷 1-10页

作者： Shanwu Zhang Yun Qiu Hangyu Chen Junqiang Shen Junpeng Zhang jing Cha Fuwen Qiu chunsheng jing Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China Laboratory for Regional Oceanography and Numerical Modeling Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China

Near-inertial motions contribute most of the velocity shear in the upper ocean.In the Bay of Bengal(BoB),the annual-mean energy flux from the wind to near-inertial motions in the mixed layer in 2013 is dominated by tropical cyclone(TC)processes.However,due to the lack of long-term observations of velocity profiles,our knowledge about interior near-inertial waves(NIWs)as well as their shear features is limited.In this study,we quantified the contribution of NIWs to shear by integrating the wavenumber-frequency spectra estimated from velocity profiles in the upper layers(40-440 m)of the southern Bo B from April 2013 to May 2014.It is shown that the annual-mean proportion of near-inertial shear out of the total is approximately 50%,and the high contribution is mainly due to the enhancement of the TC processes during which the near-inertial shear accounts for nearly 80%of the total.In the steady monsoon seasons,the near-inertial shear is dominant to or at least comparable with the subinertial shear.The contribution of NIWs to the total shear is lower during the summer monsoon than during the winter monsoon owing to more active mesoscale eddies and higher subinertial shear during the summer monsoon.The Doppler shifting of the M_(2)internal tide has little effect on the main results since the proportion of shear from the tidal motions is much lower than that from the near-inertial and subinertial motions.

关键词： near-inertial waves shear monsoon tropical cyclone Bay of Bengal

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基于Kalman滤波思想的接触线高度检测数据粗差修正算法

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中国铁路 2024年第1期 162-168页

作者：王斌王婧杨志鹏刘晓峰曹春生中国铁道科学研究院集团有限公司基础设施检测研究所北京100081 中国国家铁路集团有限公司铁路基础设施检测中心北京100081 中国铁路西安局集团有限公司检测所陕西西安710054

接触线高度平顺性是评价接触网设备动态运行质量的重要指标。针对接触线高度检测数据中的粗差,基于Kalman滤波思想提出相应的粗差辨识与修正算法。将接触线高度视作一个连续平稳系统,利用矩形窗函数定义系统状态值,实现检测数据的分段... 详细信息

接触线高度平顺性是评价接触网设备动态运行质量的重要指标。针对接触线高度检测数据中的粗差,基于Kalman滤波思想提出相应的粗差辨识与修正算法。将接触线高度视作一个连续平稳系统,利用矩形窗函数定义系统状态值,实现检测数据的分段线性化;依据系统状态值的回归预测方法和状态差异的量化方案,构建粗差辨识与修正算法,并引入适用于锚段关节处双支接触线采集特征的回溯机制;基于大量实测数据,采用显著性检验等统计方法确定算法参数,并从回溯、修正、运用和实时性等方面,对算法有效性和可行性进行分析验证,结果表明:该算法能够完成各类接触线高度检测粗差的高速实时辨识与修正。

关键词：接触网接触线高度检测数据粗差修正 Kalman滤波回溯机制

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基于UPLC-Q-Exactive Plus-Orbitrap MS的丹参提取物成分表征及其抗血栓作用谱效相关药效物质基础解析

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中草药 2024年第5期55卷 1609-1619页

作者：刘悦丁晓彦王娜高燕杨龙飞吕婧韩利文傅春升赵渤年山东中医药大学药物研究院黄河流域特色中药生态保护和高质量发展协同创新中心山东济南250355 山东中医药大学附属医院药学部山东济南250014 山东省中医药研究院山东济南250014 山东现代学院山东济南250104 山东第一医科大学(山东省医学科学院) 药学院(药物研究所)山东济南250024 山东中医药大学附属医院山东济南250014

目的研究不同产地丹参Salvia miltiorrhiza提取物化学成分与其抗血栓作用的谱效关系,分析丹参提取物的抗血栓活性成分。方法采用超高效液相色谱-四极杆-静电轨道阱-高分辨质谱(UPLC-Q-Exactive Orbitrap MS)法建立丹参提取物的指纹图谱... 详细信息

目的研究不同产地丹参Salvia miltiorrhiza提取物化学成分与其抗血栓作用的谱效关系,分析丹参提取物的抗血栓活性成分。方法采用超高效液相色谱-四极杆-静电轨道阱-高分辨质谱(UPLC-Q-Exactive Orbitrap MS)法建立丹参提取物的指纹图谱;结合层次聚类分析(hierarchical cluster analysis,HCA)、正交偏最小二乘-判别分析(orthogonal partial least squares-discrimination analysis,OPLS-DA)探讨不同产地丹参的成分差异;以斑马鱼为模式生物测定不同产地丹参提取物的抗血栓活性;利用偏最小二乘回归(partial least squares regression,PLSR)分析进行谱-效相关研究,筛选出药效贡献较大成分。结果通过聚类分析,60批丹参样品聚为2类;OPLS-DA筛选出2组间的15个差异共有峰;PLSR分析提示在标定的39个共有峰中,与丹参抗血栓活性最相关的化合物可能为峰1(二糖)、峰31(新隐丹参酮)、峰26(丹参醛)、峰34(隐丹参酮)、峰39(二氢隐丹参酮)、峰8(迷迭香酸)、峰18(4-甲基丹酚酸酯B或异构体)和峰17(丹酚酸B)。结论借助中药谱效学初步阐释了丹参抗血栓作用的药效物质基础,为丹参谱-效相关质量评价体系的建立提供科学依据,为丹参临床治疗血栓性疾病提供数据支持。

关键词：丹参 UPLC-Q-Exactive-Orbitrap MS 斑马鱼抗血栓偏最小二乘回归分析新隐丹参酮丹参醛隐丹参酮二氢隐丹参酮迷迭香酸 4-甲基丹酚酸酯B 丹酚酸B

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