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围垦养殖对滨海湿地土壤铁还原菌群落结构的影响

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福建农林大学学报（自然科学版） 2024年第5期53卷 704-711页

作者：成立文周雅心曾庆淞周明炀许旭萍郑毅王维奇福建师范大学生命科学学院福建福州350117 福建师范大学地理研究所福建福州350007

【目的】探究滨海湿地围垦养殖前后土壤铁还原菌群落的结构变化､功能演变及其影响因素,了解湿地微生物多样性的变化。【方法】以我国黄河口碱蓬湿地､九龙江口桐花树湿地､东寨港木榄湿地为样地,利用高通量技术分析铁还原菌的群落结构,并... 详细信息

【目的】探究滨海湿地围垦养殖前后土壤铁还原菌群落的结构变化､功能演变及其影响因素,了解湿地微生物多样性的变化。【方法】以我国黄河口碱蓬湿地､九龙江口桐花树湿地､东寨港木榄湿地为样地,利用高通量技术分析铁还原菌的群落结构,并采用盐酸浸提-邻菲罗啉比色法测定土壤中Fe(Ⅲ)､Fe(Ⅱ)含量。【结果】(1)围垦养殖后,黄河口围垦区的拟杆菌门(Bacteroidetes)为优势菌门,九龙江口围垦区和东寨港围垦区的优势菌门均为变形菌门(Proteobacteria);黄河口围垦区的拟杆菌属(Bacteroides)为优势菌属,九龙江口围垦区的弧菌属(Vibrio)､脱硫单胞菌属(Desulfuromonas)､硫杆菌属(Thiobacillus)为优势菌属,东寨港围垦区的气单胞菌属(Aeromonas)和硫杆菌属为优势菌属。(2)围垦养殖后,黄河口围垦区微生物化能异养､发酵功能的相对丰度升高;东寨港围垦区微生物化能异养､有氧化能异养､发酵以及硝酸盐还原功能的相对丰度升高;九龙江口围垦区微生物有氧化能异养､硝酸盐还原功能的相对丰度升高。(3)冗余分析结果显示:土壤pH值对铁还原菌群落结构的影响最大;Fe(Ⅱ)含量对土壤铁还原菌群落结构的影响比Fe(Ⅲ)含量大。【结论】围垦养殖后,土壤理化性质以及Fe(Ⅲ)､Fe(Ⅱ)含量会对铁还原菌产生影响,其中,pH值的影响最大;铁还原菌群落的适应性强,有利于养殖。

关键词：围垦养殖铁还原菌群落结构滨海湿地

Delay Compensation of Neutral-Type Time-Delay Control Systems by Cascaded-Observers

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Journal of Systems Science & Complexity 2023年第3期36卷 1053-1069页

作者： LIU qingsong Engineering Research Center of Metallurgical Automation and Measurement Technology Wuhan University of Science and TechnologyWuhan 430081China

This paper is concerned with the input delay compensation problem for neutral-type systems with both state and input ***/various cascaded-observers based output feedback controllers are designed to predict the future states such that the input delay that can be arbitrarily large yet exactly known is compensated *** with the existing techniques,some more simple necessary and sufficient conditions guaranteeing the stability of the closed-loop systems are offered in terms of the stability of retarded-type time-delay systems referred to as observer-error ***,the lossless transmission line control system is worked out to illustrate the effectiveness of the proposed controllers.

关键词： Cascaded-observers input delay compensation neutral-type time-delay systems stabilization state and input delays

Consensus of Discrete-Time Multi-Agent Systems with State,Input and Communication Delays

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Consensus of Discrete-Time Multi-Agent Systems with State,In...

22 kW near-diffraction-limited Yb:YAG slab laser amplifier without adaptive optics correction

第36届中国控制会议

作者： qingsong Liu Bin zhou Center for Control Theory and Guidance Technology Harbin Institute of Technology

ISBN: (纸本)9781538629185

This paper studies the consensus problem for discrete-time multi-agent systems with state,input and different communication delays,where the input delays can be arbitrarily large yet exactly ***,the communication delays are different for different agents and can also be arbitrarily large.A nested predictor based protocol is established to solve the *** is shown that both the input and communication delays can be compensated ***,a linear matrix inequalities based approach is provided to design the state feedback ***,a numerical example is worked out to illustrate the effectiveness of the proposed approach.

关键词： State delay input delay consensus discrete-time multi-agent systems nested predictor

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Chinese Optics Letters 2024年第3期22卷 65-70页

作者：汪丹何平周唐建李密邬映臣王亚楠尚建力高清松张凯唐淳朱日宏 School of Electronic and Optical Engineering Nanjing University of Science and TechnologyNanjing 210094China Institute of Applied Electronics China Academy of Engineering PhysicsMianyang 430079China Graduate School of China Academy of Engineering Physics Beijing 100193China

A high-power CW Yb:YAG slab laser amplifier with no adaptive optics correction has been experimentally *** room temperature,the amplifier emits a power of 22 kW with an average beam quality(β)of less than 3 in 0.5 *** our knowledge,this is the brightest slab laser without closed-loop adaptive optics demonstrated to *** addition,an extracted power of 17 kW with an optical extraction efficiency of 33%,corresponding to a residual optical path difference of less than 0.5μm,is achieved with the single Yb:YAG slab gain *** slab gain module has the potential to be scalable to higher powers while maintaining good beam *** makes a high-power solid-state laser system simpler and more robust.

关键词： laser amplifier Yb:YAG slab laser surface quality pumping uniformity

Large aperture disk standing-wave unstable resonator with intra-cavity adaptive correction

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Chinese Optics Letters 2024年第5期22卷 57-61页

作者：于益易家玉徐浏尚建力吴晶童立新高清松唐淳张卫陈磊 Department of Optical Engineering Nanjing University of Science and TechnologyNanjing 210094China Graduate School of China Academy of Engineering Physics Beijing 100193China Institute of Applied Electronics China Academy of Engineering PhysicsMianyang 621900China

An unstable resonator with seven large aperture ceramic disks and intra-cavity adaptive correction is *** composite ceramic disks with absorption rings were adopted to suppress amplified spontaneous *** intra-cavity aberration non-conjugate correction based on round-trip wavefront and relaxation iteration was applied in the *** tilt and defocus were corrected in turn,an average output power of 4.5 kW was *** corresponding beam quality factorβwas *** tilt,defocus,and high order aberrations were corrected,the average output power was increased to 5.4 kW,and the beam quality factorβwas improved to 6.8.

关键词： Nd:YAG disk unstable resonator intra-cavity adaptive optics composite ceramic

欧盟PFAS限制提案解读及其对制冷空调行业影响与应对

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制冷学报 2024年第2期45卷 22-29页

作者：安青松侯佳鑫史琳戴晓业天津大学机械工程学院天津300350 清华大学能源与动力工程系北京100084

在《〈关于消耗臭氧层物质的蒙特利尔议定书〉基加利修正案》的履约和“双碳”目标的双重驱动下,制冷剂替代是制冷空调领域最为关注的热点之一。采用热物性相近的低GWP的HFOs制冷剂和天然制冷剂作为替代品,实现HFCs的削减被认为是较为... 详细信息

在《〈关于消耗臭氧层物质的蒙特利尔议定书〉基加利修正案》的履约和“双碳”目标的双重驱动下,制冷剂替代是制冷空调领域最为关注的热点之一。采用热物性相近的低GWP的HFOs制冷剂和天然制冷剂作为替代品,实现HFCs的削减被认为是较为合适的替代技术路线;但随着2023年2月欧盟出台的PFAS限制提案,引发了对HFOs制冷剂替代前景的担忧,这可能影响全球制冷剂替代发展。因此,首先对PFAS物质进行了介绍,分析了含氟制冷剂与PFASs的关系,并对PFAS法案的形成脉络和关键内容进行了解读,总结了不同领域对此的观点,希望对未来制冷剂替代方案的制定提供一定思辨意义和参考价值。

关键词：制冷剂替代欧盟PFAS法案 PFASs HFOs 基加利修正案

Pseudo-Predictor Feedback Control for Multiagent Systems with Both State and Input Delays

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IEEE/CAA Journal of Automatica Sinica 2021年第11期8卷 1827-1836页

作者： qingsong Liu Engineering Research Center of Metallurgical Automation and Measurement Technology Wuhan University of Science and TechnologyWuhan 430081 School of Information Science and Engineering Wuhan University of Science and TechnologyWuhan 430081China

This paper is concerned with the consensus problem for high-order continuous-time multiagent systems with both state and input delays.A novel approach referred to as pseudopredictor feedback protocol is *** the predictorbased feedback protocol which utilizes the open-loop dynamics to predict the future states,the pseudo-predictor feedback protocol uses the closed-loop dynamics of the multiagent systems to predict the future agent ***-order/reduced-order observer-based pseudo-predictor feedback protocols are proposed,and it is shown that the consensus is achieved and the input delay is compensated by the proposed *** and sufficient conditions guaranteeing the stability of the integral delay systems are provided in terms of the stability of the series of retarded-type time-delay ***,compared with the existing predictor-based protocols,the proposed pseudo-predictor feedback protocol is independent of the input signals of the neighboring agents and is easier to ***,a numerical example is given to demonstrate the effectiveness of the proposed approaches.

关键词： Consensus input delay compensation multiagent systems pseudo-predictor feedback protocol state and input delays

夹层型页岩油突破及其油气地质意义——以四川盆地中部G119H井为例

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天然气工业 2024年第3期44卷 53-63页

作者：郭贵安唐青松蒋裕强朱讯方锐周亚东洪海涛张连进张新宇中国石油西南油气田公司西南石油大学地球科学与技术学院中国石油非常规油气重点实验室储层评价实验室中国石油西南油气田公司勘探开发研究院中国石油西南油气田公司开发事业部

近期,中国石油西南油气田公司在四川盆地中部(以下简称川中)公山庙西地区部署实施的侏罗系凉高山组夹层型页岩油重点评价井——G119H井,测试获产油20 t/d、产气0.6×10^(4) m^(3)/d,取得了该盆地湖相夹层型页岩油的新突破。为了进一步... 详细信息

近期,中国石油西南油气田公司在四川盆地中部(以下简称川中)公山庙西地区部署实施的侏罗系凉高山组夹层型页岩油重点评价井——G119H井,测试获产油20 t/d、产气0.6×10^(4) m^(3)/d,取得了该盆地湖相夹层型页岩油的新突破。为了进一步明确四川盆地凉高山组湖相页岩油的资源潜力及勘探前景,基于G119H井所在区域的地质、地震资料,开展了凉高山组沉积地质背景、河道刻画、优质储层特征、富集模式等研究。研究结果表明:(1)凉高山组在多期湖盆迁移背景下,纵向发育多期叠置湖相页岩、三角洲前缘砂体;(2)公山庙西地区凉二段底部发育浅水三角洲前缘砂体,砂体由西南向北东推进入湖;(3)凉二段分流河道为最有利微相,岩性主要为细—中粒岩屑砂岩,平均孔隙度达6.3%,孔喉结构为小孔—微喉连通模式,可动油占比较高;(4)凉高山组夹层型页岩油分布广,具备烃源岩厚度大(超过10 m)、储层物性好、源储组合相邻匹配等有利条件;(5)该盆地内凉高山组夹层型页岩油有利地区面积约1.38×10^(4) km^(2),利用四川盆地现有三维地震资料刻画凉二段分流河道分布面积为2 336 km^(2),估算石油资源量约15×10^(8) t。结论认为,G119H井的突破揭示了川中地区凉二段夹层型页岩油具有规模开发潜力,进一步展现了盆地侏罗系页岩油良好的资源基础,明确了川中地区凉二段夹层型页岩油是“十四五”及中长期增储上产重点层段。

关键词：四川盆地夹层型页岩油侏罗系凉高山组公山庙勘探突破

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干燥方式对苹果果胶含量及品质特性的影响

食品工业科技 2024年第8期45卷 88-96页

作者：刘青松刘传犇王振钟政昌西藏农牧学院食品科学学院西藏林芝860000 西藏野生生物资源评价与利用实验室西藏林芝860000 西藏特色农牧资源研发省部共建协同创新中心西藏林芝860000

目的:研究不同干燥方式对三种类型苹果果胶(WSP、NSP、CSP)处理后,其含量及品质特性变化。方法:采用热风干燥(60、75、90℃)、真空冷冻干燥(-50℃)、自然晾晒干燥方法对苹果果胶干燥处理,研究干燥方式对苹果的褐变度及对三种类型苹果果... 详细信息

目的:研究不同干燥方式对三种类型苹果果胶(WSP、NSP、CSP)处理后,其含量及品质特性变化。方法:采用热风干燥(60、75、90℃)、真空冷冻干燥(-50℃)、自然晾晒干燥方法对苹果果胶干燥处理,研究干燥方式对苹果的褐变度及对三种类型苹果果胶含量、蛋白质含量、总糖含量、抗氧化能力及果胶结构的影响。结果:60℃热风干燥下苹果片的褐变度最小。三种不同类型果胶的含量不同,WSP含量最多,变幅为58.06%~77.09%,NSP次之,变幅为30.57%~54.98%,CSP含量最少,变幅为14.64%~27.06%,其中以60℃热风干燥处理后的三种类型果胶含量最多。三种不同类型果胶的总糖含量也不同,WSP、CSP和NSP总糖含量变幅分别是34.56%~6.92%、11.02%~4.04%、15.46%~8.75%。其中以75℃热风干燥下的WSP的总糖含量为最高;90℃热风干燥下的NSP和CSP的总糖含量为最高。三种不同类型果胶的蛋白质含量不同,WSP、NSP、CSP变幅分别是:2.92%~5.73%、1.39%~4.27%、1.50%~5.40%。傅里叶红外光谱分析表明,不同干燥条件下苹果果胶的结构差异不大。干燥方式对果胶的抗氧化能力具有显著的影响,WSP和NSP的抗氧化能力变幅分别为91.27%~78.54%、8.15%~2.14%,CSP的抗氧化能力很弱。其中以90℃热风干燥下的WSP和NSP抗氧化能力为最强,分别是91.27%、8.15%,冷冻干燥下的WSP和NSP抗氧化能力为最弱,分别是78.54%、2.14%。结论:不同干燥方式处理苹果后,苹果中的3种不同类型果胶含量、性质存在差异性。60℃热风干燥的苹果果胶最佳,所得苹果果胶含量、总糖含量、蛋白质含量、抗氧化能力分别是50.69%、15.27%、3.61%、31.33%。该研究可为苹果果胶的提取工艺和不同类型的果胶的抗氧化能力研究提供理论支持,也可为进一步研究不同干燥方法对果胶含量的影响提供一定的参考。

关键词：果胶抗氧化能力还原力干燥方式

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