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Identification of Monitoring Organ in Bivalves for Early Warning of Paralytic Shellfish Toxins Accumulation

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Journal of Ocean University of China 2023年第1期22卷 251-257页

作者： MENG Deting SHI Jiaoxia LI Moli wei zhongcheng WANG Yangrui XU Yiqiang LI Yubo BAO Zhenmin HU Xiaoli MOE Key Laboratory of Marine Genetics and Breeding College of Marine Life SciencesOcean University of ChinaQingdao 266003China Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Laboratory of Tropical Marine Germplasm Resources and Breeding Engineering Sanya Oceanographic InstitutionOcean University of ChinaSanya 572000China

Bivalve farming plays a dominant role in mariculture in *** shellfish toxins(PSTs)can be accumulated in bivalves and cause poisoning the consumers.A sensitive detection of PSTs can provide early warning to decrease poisoning events in bivalve *** are traditionally examined using the whole ***,PSTs accumulation varies dramatically in different tissues of *** tough tissues/organs(such as mantle),which account for a large proportion of the total soft body,exhibit a lower accumulation of PSTs and make the toxin extraction time-and reagent-consuming,potentially decreasing the accuracy and sensitivity of PSTs monitoring in *** develop a sensitive and cost-effective approach for PSTs examination in massively farmed bivalves,we fed three commercially important bivalves,Yesso scallop Patinopecten yessoensis,Pacific oyster Crassostrea gigas,and blue mussel Mytilus edulis with PSTs-producing dinoflagellate Alexandrium catenella,and detected PSTs concentration in different *** all three bivalve species,the digestive gland accumulated much more PSTs than other tissues,and the digestive gland’s toxicity was significantly correlated with the PSTs toxicity of the whole soft-tissues,with r^(2)=0.94,0.92,and 0.94 for Yesso scallop,Pacific oyster,and blue mussel,*** the toxicity of the whole soft-tissues reached 80μgSTXeq(100g)^(−1),the regulatory limit for commercial shellfish,the digestive gland’s toxicity reached 571.48,498.90,and 859.20μgSTXeq(100g)^(−1) in Yesso scallop,Pacific oyster,and blue mussel,*** results indicate that digestive gland can be used for the sensitive and cost-effective monitoring of PSTs in bivalves.

关键词： paralytic shellfish toxins monitoring bivalve early warning digestive gland

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离心式压缩机在氯乙烯生产中的应用

聚氯乙烯 2024年第6期52卷 30-34页

作者：史丽杰魏忠成鲁丽敏吕峰杨巴特尔丁鼎王晓宇内蒙古亿利化学工业有限公司内蒙古鄂尔多斯014300

介绍了氯乙烯压缩机的发展历程、工作原理及系统组成,并进行了综合对比。离心式氯乙烯压缩机脱颖而出,具有高效节能、对化工介质绝对无油、连续无故障运行周期长、气量大、备件需用量少等优点,在氯乙烯生产中将会被广泛的应用。

关键词：氯乙烯离心式压缩机工作原理应用

A New MAC Protocol for Moving Target in Distributed Wireless Sensor Networks

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Wireless Sensor Network 2011年第2期3卷 61-72页

作者： Jijun Zhao Xiang Sun zhongcheng wei Zhihua Li 不详

A wireless sensor network (WSN) is composed of many nodes with limited power supply;most nodes are stationary in the network which could probably involve a few mobile nodes. Various medium access control (MAC) protocols specially aimed at a target locating application for WSNs have been proposed. However, most of these protocols based on the problem of energy-limited does not consider the mobility of nodes. Therefore, in order to solve such problem, this paper proposes a MAC protocol—Distribute Moving-MAC (DM-MAC). Under the condition of keeping high network coverage, the protocol utilizes the redundancy of nodes to strengthen the robustness and energy efficiency of network, and decreases the packet loss rate of the mobile node’s communication links for realizing reliable communication of two nodes. Simulation indicates that the new protocol has higher energy efficiency, lower packet loss rate and higher network coverage which suit for wireless sensor network with mobile nodes well.

关键词： Wireless Sensor Network (WSN) Distribute Moving-MAC (DM-MAC) LDAS EAR Mo-bility

A bacterial symbiont in the gill of the marine scallop Argopecten irradians irradians metabolizes dimethylsulfoniopropionate

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微生物(英文) 2023年第2期2卷 178-189页

作者： Yi Shu Yongming Wang zhongcheng wei Ning Gao Shuyan Wang Chun-Yang Li Qiang Xing Xiaoli Hu Xiao-Hua Zhang Yu-Zhong Zhang weipeng Zhang Zhenmin Bao wei Ding MOE Key Laboratory of Marine Genetics and Breeding Ocean University of ChinaQingdaoChina Laboratory of Tropical Marine Germplasm Resources and Breeding Engineering Sanya Oceanographic InstitutionOcean University of ChinaSanyaChina College of Marine Life Sciences Ocean University of ChinaQingdaoChina Institute of Evolution&Marine Biodiversity Ocean University of ChinaQingdaoChina

Microbial lysis of dimethylsulfoniopropionate(DMSP)is a key step in marine organic sulfur cycling and has been recently demonstrated to play an important role in mediating interactions between bacteria,algae,and *** date,microbes that have been found to lyse DMSP are largely confined to free‐living and surface‐attached *** this study,we report for the first time that a symbiont(termed“Rhodobiaceae bacterium HWgs001”)in the gill of the marine scallop Argopecten irradians irradians can lyse and metabolize *** of 16S rRNA gene sequences suggested that HWgs001 accounted for up to 93%of the gill *** observations suggested that HWgs001 lived within the gill *** symbionts of other bivalves,HWgs001 belongs to Alphaproteobacteria rather than Gammaproteobacteria,and no genes for carbon fixation were identified in its small ***,HWgs001 was found to possess a dddP gene,responsible for the lysis of DMSP to *** enzymatic activity of dddP was confirmed using the heterologous expression,and in situ transcription of the gene in scallop gill tissues was demonstrated using reverse‐transcription ***,these results revealed a taxonomically and functionally unique symbiont,which represents the first‐documented DMSP‐metabolizing symbiont likely to play significant roles in coastal marine ecosystems.

关键词： A/phaproteobacteria dddP DMSP lyases scallop symbiont

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新冠文本实体关系抽取及数据集构建方法研究

计算机工程与应用 2023年第8期59卷 97-104页

作者：杨崇洛生龙魏忠诚王巍河北工程大学信息与电气工程学院河北邯郸056038 河北省安防信息感知与处理重点实验室河北邯郸056038

实体关系抽取可有效地获取文本中的关键信息,利用新冠文本中的关键信息有助于切断疫情传播途径,发掘疫情传播源头。但该领域没有适合的公开有标注的数据集,针对该问题,通过分析新冠文本的语义表示和结构特点,提出一种针对新冠文本的实... 详细信息

实体关系抽取可有效地获取文本中的关键信息,利用新冠文本中的关键信息有助于切断疫情传播途径,发掘疫情传播源头。但该领域没有适合的公开有标注的数据集,针对该问题,通过分析新冠文本的语义表示和结构特点,提出一种针对新冠文本的实体关系定义,并根据实体关系定义对收集的数据进行实体标注和关系标注,在标注完成后,通过数据预处理等操作生成新冠文本实体关系抽取数据集。与公开数据集相比,该领域的数据集本文实体和关系分布较为密集,单一神经网络模型特征抽取能力较差,因此采用多种神经网络模型拼接的方法构建命名实体识别模型和关系抽取模型。通过模型的结果对数据集进行实验验证,实验结果证明该数据集可以应用于该领域的实体关系抽取任务。

关键词：数据集实体关系定义数据标注双向循环神经网络卷积神经网络

Software Method for the Extension of the STM/AFM Measuring Range

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Chinese Journal of Lasers 1999年第2期8卷 78-83页

作者： CHEN Jiabi LOU Xiaoxiao CAO Junqing ZHUANG Songling (Department of Instruments of University of Shanghai for Science and Technology, Shanghai 200093, China)WU wei LIANG zhongcheng (Department of Physics, Nanjing Normal University, Nanjing 2 上海理工大学仪表系上海 200093 上海理工大学仪表系上海南京师范大学物理系江苏南京

１ＩｎｔｒｏｄｕｃｔｉｏｎＳｃａｎｎｉｎｇｔｕｎｎｅｌｉｎｇｍｉｃｒｏｓｃｏｐｙ（ＳＴＭ）ａｎｄａｔｏｍｉｃｆｏｒｃｅｍｉｃｒｏｓｃｏｐｙ（ＡＦＭ）ａｒｅｉｎｓｔｒｕｍｅｎｔｓｗｉｔｈｕｌｔｒａｈｉｇｈｒｅｓｏｌｕ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＳｃａｎｎｉｎｇｔｕｎｎｅｌｉｎｇｍｉｃｒｏｓｃｏｐｙ（ＳＴＭ）ａｎｄａｔｏｍｉｃｆｏｒｃｅｍｉｃｒｏｓｃｏｐｙ（ＡＦＭ）ａｒｅｉｎｓｔｒｕｍｅｎｔｓｗｉｔｈｕｌｔｒａｈｉｇｈｒｅｓｏｌｕｔｉｏｎｉｎｖｅｎｔｅｄｉｎ１９８...

关键词： image matching affine transformation measuring range extension

Design， fabrication and characteristics of optofluidic variable aperture based on electromagnetic-driving

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Optoelectronics Letters 2024年

作者： ZHANG Anning ZHAO Rui wei Xian LIANG zhongcheng HAN Zefeng Center of Optofluidic Technology， College of Optoelectronic Engineering， Nanjing University of Posts and Telecommunications

An electromagnetic-driving variable liquid aperture is designed and fabricated. It consists of a driving cavity， an optical cavity and a storage chamber， a polydimethylsiloxane（PDMS）elastic film， an annular magnet and a driving coils. The driving cavity is filled with dyeing liquid while the colorless transparent liquid fills the optical cavity and the storage chamber. When applying current， the annular magnet moves downward driven by the magnetic field leading to deformation of the PDMS film. Being squeezed by the moving magnet with the deforming film， the dyeing liquid flows from the driving cavity into the optical cavity， which contributes to the decrease of the clear aperture diameter in the optical cavity. Our proposed aperture performs continuous variable ability up to 2.775 mm in diameter of clear aperture when the current increases from 0 to 0.33A， and its relative transmittance ranges from 98.539% to 22.776% ～390 nm.

关键词：

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基于XML的飞行仿真气动力模型存储格式

航空学报 2020年第9期41卷 80-90页

作者：宋宏川詹浩魏中成任浩雷夏露西北工业大学航空学院西安710072 中国航空工业集团公司成都飞机设计研究所成都610091 西安地平线电子科技有限公司西安710072

飞行仿真获取气动力/力矩的传统方法主要是将气动力模型硬编码在仿真程序进行求解。由于气动力模型和求解程序耦合,一旦修正或更换气动力模型,需要花费大量代价来重新构建仿真过程,无法满足现代飞行器仿真的需求。根据气动力模型树形结... 详细信息

飞行仿真获取气动力/力矩的传统方法主要是将气动力模型硬编码在仿真程序进行求解。由于气动力模型和求解程序耦合,一旦修正或更换气动力模型,需要花费大量代价来重新构建仿真过程,无法满足现代飞行器仿真的需求。根据气动力模型树形结构的特点,提出了气动力模型树的概念并基于XML语言的特点设计了一种模型存储格式(MBX)来存储气动力模型树。MBX存储格式不仅提高了飞行仿真系统更换和修正气动力模型的效率,而且提高了气动力/力矩解算的通用性,使得气动力/力矩的求解能够被标准化。MBX存储格式作为气动力模型交换标准不仅能把不同部门交换气动力模型的时间从几周/人缩短至几天/人,也能加快气动力模型逼近飞机真实气动特性的进程。

关键词：存储格式气动力模型树形结构气动力/力矩解算飞行仿真数据交换标准 XML

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鸭式飞机矢量喷流对大迎角气动特性的影响

航空学报 2020年第12期41卷 224-239页

作者：魏中成王海峰袁兵李盈盈北京航空航天大学航空科学与工程学院北京100083 航空工业成都飞机设计研究所成都610091

针对单发鸭式布局飞机,通过低速风洞试验,研究了矢量喷流对飞机大迎角气动力的影响特性。研究结果表明:发动机喷口直径变大使得飞机大迎角升力和阻力系数增加,并产生低头力矩系数。喷流使得飞机大迎角升力和阻力系数明显增加,并产生低... 详细信息

针对单发鸭式布局飞机,通过低速风洞试验,研究了矢量喷流对飞机大迎角气动力的影响特性。研究结果表明:发动机喷口直径变大使得飞机大迎角升力和阻力系数增加,并产生低头力矩系数。喷流使得飞机大迎角升力和阻力系数明显增加,并产生低头力矩系数;大喷口状态喷流影响比小喷口状态高50%左右。发动机喷管上/下偏转时,矢量喷流对飞机上下表面气流诱导不对称,喷管上偏减小升力和阻力系数、产生抬头力矩系数,喷管下偏增加升力和阻力系数、产生低头力矩系数,且喷管下偏影响明显比上偏大。在此基础上,基于数值模拟结果对喷流与飞机主流的相互作用机理进行了分析。

关键词：鸭式布局矢量喷流风洞试验大迎角气动特性