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Distribution and source of microplastics in China's second largest reservoir-Danjiangkou Reservoir

Journal of Environmental Sciences 2021年第4期33卷 74-84页

作者： Li Lin Xiong Pan Sheng Zhang Danwen Li Wenliang Zhai Zhen Wang Jingxiang Tao changqing mi Qingyun Li John C.Crittenden Basin Water Environmental Research Department Changjiang River Scientific Research InstituteWuhanHubei 430010China Key Lab of Basin Water Resource and Eco-Environmental Science in Hubei Province WuhanHubei 430010China School of Environmental Science and Technology Huazhong University of Science and TechnologyWuhanHubei 430074China Brook Byers Institute of Sustainable Systems School of Civil and Environmental EngineeringGeorgia Institute of TechnologyAtlantaGA 30332USA

Fresh water microplastic pollution is of pressing concern globally,but its distribution and sources in reservoirs are poorly *** Reservoir is the second largest reservoir in China and is divided into the Han Reservoir and Dan *** this work,microplastic abundances and morphological characteristics of the reservoir were *** microplastic abundance of 15 main tributaries of the reservoir was also *** vertical distribution(in water column and sediment),horizontal distribution(in Han Reservoir and Dan Reservoir)and source of microplastics were *** accumulated in the middle layer of the reservoir,and the size and color of the microplastic particles changed from the surface to the bottom,which implies that surveys of surface water are not enough to determine the microplastic contamination for deep water *** the surface water,the microplastic abundance in the Han Reservoir was lower than that in the Dan Reservoir(pmicroplastic abundance did not differ significantly in the intermediate and bottom *** were one of the main sources of microplastics for Han Reservoir but not for Dan *** cultivation in the hydro-fluctuation belt might be an important source of microplastics in the Dan Reservoir,which should be given additional *** results of this study can provide valuable information for developing microplastic sampling strategies in deep water *** studies are recommended to investigate the process through which microplastics in the hydro-fluctuation belt enter the reservoir and the sinking behavior of microplastics in the reservoir.

关键词： microplastic Vertical distribution Source Hydro-fluctuation belt Danjiangkou Reservoir

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混频算法在科氏质量流量计上的应用

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仪器仪表用户 2015年第6期22卷 62-63,61页

作者：苏刚琴秘长青中航工业太原太航流量工程有限公司太原030006

介绍了科里奥利质量流量计基于混频算法的数字信号处理系统,用于测量传感器两路同频信号之间的相位差。该系统使用数字信号处理器(DSP),在固定采样频率下,对经过调理电路、模/数转换(A/D)后的振动传感器信号再经过数字滤波器,进行混频算... 详细信息

介绍了科里奥利质量流量计基于混频算法的数字信号处理系统,用于测量传感器两路同频信号之间的相位差。该系统使用数字信号处理器(DSP),在固定采样频率下,对经过调理电路、模/数转换(A/D)后的振动传感器信号再经过数字滤波器,进行混频算法,计算得到传感器信号的相位差。

关键词：混频科氏质量流量计相位差

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科氏流量计残余应力影响与处理

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自动化仪表 2017年第3期38卷 82-84页

作者：李睿娣任东顺秘长青太原太航流量工程有限公司山西太原030006

为提高科氏流量计的精度,对科氏流量计的精度与科氏传感器的应力进行了研究。从科氏流量计的原理及结构出发,分析了应力与零点稳定度的关系,发现各种不平衡的残余应力给科氏传感器的零点稳定性带来了严重影响。采用热时效、振动时效两... 详细信息

为提高科氏流量计的精度,对科氏流量计的精度与科氏传感器的应力进行了研究。从科氏流量计的原理及结构出发,分析了应力与零点稳定度的关系,发现各种不平衡的残余应力给科氏传感器的零点稳定性带来了严重影响。采用热时效、振动时效两种方法对两台标定不合格的传感器分别进行处理,将两台流量计的精度均从1级提高到了0.1级。焊缝的应力检测及传感器标定结果表明,处理后的焊缝残余应力得到降低与均化,科氏传感器的零点稳定度及精度得到显著提高。将该方法推广到大量的科氏传感器上,得到了非常好的应用效果。该方法既提高了科氏流量计的精度,又缩短了生产交货周期,大大提升了生产效率与产品质量。该方法同样适用于提升具有复杂机械结构的传感器的稳定度及精度。

关键词：科氏流量计零点稳定度残余应力热时效电磁干扰精度

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质量流量计气体测量研究

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仪器仪表用户 2015年第5期22卷 46-48页

作者：郭海文秘长青任东顺李有亮太原太航流量工程有限公司太原030006

本文简单介绍了质量流量计的工作原理,着重阐述了质量流量计在气体测量方面的难点,以及为达到准确测量目的所采取的关键技术,最后用详细数据验证了采取关键技术后所达到的效果。

关键词：质量流量计科里奥利原理气体测量

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A Case of Acute Upper Gastrointestinal Bleeding in Liver Cirrhosis Complicated by Acute Cerebral Infarction and Acute Myelitis

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Journal of Biosciences and Medicines 2023年第5期11卷 303-309页

作者： Xiaohui Liao Tengteng Xu Xianhua Zhang Xianliang mi changqing Yang Zibai Wei Department of Gastroenterology Heping Hospital Affiliated to Changzhi Medical College Changzhi China

Background: Acute upper gastrointestinal bleeding in liver cirrhosis combined with acute cerebral infarction is uncommon in clinical work, and then combined with acute myelitis is even rarer and more complex, which poses a greater challenge to clinical diagnosis and treatment. This paper reports a case of acute upper gastrointestinal bleeding in liver cirrhosis complicated by acute cerebral infarction and acute myelitis, which be hoped to provide a reference for clinical work. Methods: We retrospectively evaluated the clinical information of a 68-year-old female admitted to the Digestive Medical Department with acute gastrointestinal bleeding and appeared limb movement disorder on the third day. Results: The patient was eventually diagnosed with acute upper gastrointestinal bleeding in liver cirrhosis complicated by acute cerebral infarction and acute myelitis. Conclusions: When patients with liver cirrhosis have abnormal neurological symptoms, in addition to liver cirrhosis-related complications, doctors need to consider cerebrovascular diseases and myelitis.

关键词： Liver Cirrhosis Upper Gastrointestinal Bleeding Acute Cerebral Infarction Acute Myelitis

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Pore-Throat Combination Types and Gas-Water Relative Permeability Responses of Tight Gas Sandstone Reservoirs in the Zizhou Area of East Ordos Basin, China

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Acta Geologica Sinica(English Edition) 2019年第3期93卷 622-636页

作者： LI mi GUO Yinghai LI Zhuangfu WANG Huaichang ZHANG Jingxia Key Laboratory of Coalbed Methane Resource and Reservoir Formation Process Ministry of EducationXuzhou 221008JiangsuChina School of Resources and Geosciences China University of Mining&TechnologyXuzhou 221116JiangsuChina Research Institute of Petroleum Exploration&Development of changqing Oilfield Company PetroChinaXi’an 710021ShaanxiChina

With the aim of better understanding the tight gas reservoirs in the Zizhou area of east Ordos Basin,a total of 222 samples were collected from 50 wells for a series of *** this study,three pore-throat combination types in sandstones were revealed and confirmed to play a controlling role in the distribution of throat size and the characteristics of gas-water relative *** type-I sandstones are dominated by intercrystalline micropores connected by cluster throats,of which the distribution curves of throat size are narrow and have a strong single peak(peak ratio>30%).The pores in the type-II sandstones dominantly consist of secondary dissolution pores and intercrystalline micropores,and throats mainly occur as slice-shaped throats along cleavages between rigid grain margins and cluster throats in clay *** distribution curves of throat size for the type-II sandstones show a bimodal distribution with a substantial low-value region between the peaks(peak ratiomicro-scale throat radii(>0.5μm)constitute a large *** type-I to type-III sandstones,the irreducible water saturation(Swo)decreased;furthermore,the slope of the curves of Krw/Krg in two-phase saturation zone decreased and the two-phase saturation zone increased,indicating that the gas relative flow ability *** of the permeability exist in sandstones with different porethroat combination types,which indicate the type-III sandstones are better reservoirs,followed by type-II sandstones and type-I *** an important factor affecting the reservoir quality,the pore-throat combination type in sandstones is the cumulative expression of lithology and diagenetic modifications with stron

关键词： tight gas sandstone pore-throat combination type throat characteristic gas-water relative permeability Zizhou area Ordos Basin

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超旱生植物沙冬青高温胁迫下的快速叶绿素荧光动力学特征

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生态环境学报 2009年第6期18卷 2272-2277页

作者：张谧王慧娟于长青清华大学环境系北京100084

沙冬青Ammopiptanthus mongolicus是温带荒漠地区唯一的常绿阔叶灌木,由于其生长的沙漠中极端高温远高于其它地区,因此研究沙冬青对高温胁迫的响应特征对于解释植物的抗逆机理具有极为重要的意义。快速叶绿素荧光动力学可以在无损情况... 详细信息

沙冬青Ammopiptanthus mongolicus是温带荒漠地区唯一的常绿阔叶灌木,由于其生长的沙漠中极端高温远高于其它地区,因此研究沙冬青对高温胁迫的响应特征对于解释植物的抗逆机理具有极为重要的意义。快速叶绿素荧光动力学可以在无损情况下探知叶片光合机构的热损伤程度,JIP-test方法将测量值转化为多种具有生物学意义的参数,因而被广泛应用于高温胁迫的有关研究中。对不同环境条件下快速叶绿素荧光诱导动力学曲线的分析可以深入了解植物光合机构对环境的适应机制。本文利用高频采样叶绿素荧光仪在野外下测定了沙冬青在不同温度处理下的荧光响应情况。研究结果表明,沙冬青耐热性在4045℃;25℃、30℃及40℃时的FV/FM在0.80以上,光合反应正常。50℃时出现高温胁迫特征：1）FV/FM降低为0.73;2）OJIP曲线变形为OKJIP曲线,K点出现在300ms左右,值为245.00;3）反应中心的活性下降,QA-的还原速率加快。这些变化是由于光合反应中的电子传递受阻引起的,而光合反应中心并没有被破坏,胁迫条件解除后,光合机构还可恢复,说明沙冬青具有极强耐热性。

关键词：叶绿素荧光光合 JIP方法 OKJIP曲线性能指数

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Sedimentology and Paleoenvironmental Characteristics of Fine-grained Sediments in Coal-bearing Strata in the Eastern Ordos Basin:A Case Study of the Exploratory Well in the Zizhou Area

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Acta Geologica Sinica(English Edition) 2023年第4期97卷 1181-1195页

作者： LI Guanlin GUO Yinghai WANG Huaichang LI mi HAN Jiang YANG Xiaokai School of Resources and Geosciences China University of Mining and TechnologyXuzhouJiangsu 221116China Key Laboratory of Coalbed Methane Resources&Reservoir Formation Process Ministry of EducationXuzhouJiangsu 221008China Research Institute of Petroleum Exploration&Development of changqing Oilfield Company PetroChinaXi'an 710021China School of Energy and Materials Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China School of Vehicle and Energy Yanshan UniversityQinhuangdaoHebei 066004China

The continuously collected cores from the Permo-Carboniferous coal-bearing strata of the eastern Ordos Basin are essential for studying the hydrocarbon potential in this *** study adopted sedimentological and geochemical methods to analyze the sedimentary environment,material composition,and geochemical characteristics of the coal-bearing *** differences in depositional and paleoclimatic conditions were compared;and the factors influencing the organic matter content of fine-grained sediments were *** depositional environment of the Benxi and Jinci formations was lagoon to tidal flat with weakly reduced waters with low salinity and dry-hot paleoclimatic conditions;while that of the Taiyuan Formation was a carbonate platform and shallow water delta front,where the water was highly *** xerothermic climate alternated with the warm and humid *** period of maximum transgression in the Permo-Carboniferous has the highest water *** Shanxi Formation was deposited in a shallow water delta front with a brackish and fresh water environment and alternative weak *** the paleoclimate condition is *** TOC content in fine-grained samples was averaging 1.52%.The main controlling mechanism of organic matter in this area was the input conditions according to the analysis on input and preservation of organic matter.

关键词： fine-grained sediments paleo-sedimentary environment coal-bearing strata Permo-Carboniferous

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High-throughput sequencing exclusively identified a novel Torque teno virus genotype in serum of a patient with fatal fever

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Virologica Sinica 2014年第2期29卷 112-118页

作者： Zhiqiang mi Xin Yuan Guangqian Pei Wei Wang Xiaoping An Zhiyi Zhang Yong Huang Fan Peng Shasha Li changqing Bai Yigang Tong State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and Epidemiology Department of Respiratory Medicine PLA Hospital 307 The Third Xiangya Hospital of Central South University

Torque teno virus(TTV) has been found to be prevalent world-wide in healthy populations and in patients with various diseases, but its etiological role has not yet been determined. Using high-throughput unbiased sequencing to screen for viruses in the serum of a patient with persistent high fever who died of suspected viral infection and prolonged weakness, we identified the complete genome sequence of a TTV(isolate Hebei-1). The genome of TTV-Hebei-1 is 3649 bp in length, encoding four putative open reading frames, and it has a G+C content of 49%. Genomic comparison and a BLASTN search revealed that the assembled genome of TTV-Hebei-1 represented a novel isolate, with a genome sequence that was highly heterologous to the sequences of other reported TTV strains. A phylogenetic tree constructed using the complete genome sequence showed that TTV-Hebei-1 and an uncharacterized Taiwan Residents strain, TW53A37, constitute a new TTV genotype. The patient was strongly suspected of carrying a viral infection and died eventually without any other possible causes being apparent. No virus other than the novel TTV was identified in his serum sample. Although a direct causal link between the novel TTV genotype infection and the patient's disease could not be confirmed, the findings suggest that surveillance of this novel TTV genotype is necessary and that its role in disease deserves to be explored.

关键词： Torque teno virus genome persistent high fever high-throughput sequencing

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基于等级保护2.0标准体系的医院信息化安全建设与研究

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中国医院 2021年第1期25卷 72-73页

作者：袁骏毅潘常青宓林晖上海市胸科医院/上海交通大学附属胸科医院上海市徐汇区200030

随着信息技术的快速发展,医院信息安全面临新挑战、新要求。上海市胸科医院依据新规范、新要求,结合信息安全建设现状,建立“一个中心、三重防御”的安全防护体系。通过整体安全建设,帮助医院确定关键信息系统,识别医院信息化风险,实现... 详细信息

随着信息技术的快速发展,医院信息安全面临新挑战、新要求。上海市胸科医院依据新规范、新要求,结合信息安全建设现状,建立“一个中心、三重防御”的安全防护体系。通过整体安全建设,帮助医院确定关键信息系统,识别医院信息化风险,实现等级保护框架下自主可控的可信计算,提高医院网络信息安全能力,为医院安全高效运行保驾护航。

关键词：等保2.0 医院信息化信息安全

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