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煤矿KJ1292冲击地压地音监测系统关键参数设置研究

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煤矿现代化 2024年第3期33卷 48-52页

作者：韩飞魏焕伟殷海晨山东能源集团有限公司山东济南250014

地音监测作为煤矿冲击地压危险性监测的重要手段,通过监测频率范围在150-2000Hz的震动事件,反应煤岩体的应力集中程度,进而预测冲击地压危险性。KJ1292地音监测系统作为国内应用较多的监测系统,其通带增益、输入阻抗、浮动门限、滤波算... 详细信息

地音监测作为煤矿冲击地压危险性监测的重要手段,通过监测频率范围在150-2000Hz的震动事件,反应煤岩体的应力集中程度,进而预测冲击地压危险性。KJ1292地音监测系统作为国内应用较多的监测系统,其通带增益、输入阻抗、浮动门限、滤波算法是系统设置中最重要的4个关键参数,通过控制其他参数不变的方法,逐项研究4个关键参数的影响程度,发现通带增益对监测频次和能量均有较大影响,输入阻抗只对能量有较大影响,浮动门限只对频次有较大影响,滤波算法对监测数据影响不大,可以忽略。通过研究4个关键参数的影响原理,结合实际情况,提出了每个参数的具体设置方法与原则,对不同条件的冲击地压矿井根据实际情况优化设置参数具有指导意义。

关键词：煤矿冲击地压防冲监测地音参数设置

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玉米挥发物及其复配剂对绿盲蝽引诱作用

植物保护 2024年第5期50卷 144-150,212页

作者：王怡申梦香张建民万鹏尹海辰长江大学农学院荆州434023 农业农村部华中作物有害生物综合治理重点试验室农作物重大病虫草害防控湖北省重点试验室湖北省农业科学院植保土肥研究所武汉430064 湖北省黄冈市黄州区农业技术促进中心黄冈438000

为筛选对绿盲蝽Apolygus lucorum具有引诱作用的气味挥发物,探索和开发针对绿盲蝽的绿色高效防治技术,本文通过电生理、行为学及田间试验等手段,对绿盲蝽的寄主选择偏好进行了研究,并对选择反应率最高的寄主挥发物进行了验证。结果表明,... 详细信息

为筛选对绿盲蝽Apolygus lucorum具有引诱作用的气味挥发物,探索和开发针对绿盲蝽的绿色高效防治技术,本文通过电生理、行为学及田间试验等手段,对绿盲蝽的寄主选择偏好进行了研究,并对选择反应率最高的寄主挥发物进行了验证。结果表明,在6种主要供试寄主中,绿盲蝽雌雄成虫对玉米的选择反应率最高,分别为37.7%和33.5%,且雌成虫对寄主的选择反应强于雄成虫。在玉米主要挥发物中,绿盲蝽雌成虫对3%2-乙基己醇和1%苯乙烯电生理、行为学反应较强,选择反应率最高分别为75%和76.9%。进一步对2种挥发物不同组合的室内与田间引诱效果进行测定,结果显示,1%苯乙烯和3%2-乙基己醇最佳复配比为1∶9,在田间诱捕试验中该复配剂14 d内平均每板引诱到24.8头绿盲蝽成虫,较对照组(黄板)诱集效果提高了71%。综上,本文明确了苯乙烯和2-乙基己醇是绿盲蝽趋向玉米的关键气味化合物,对该虫具有较好的引诱作用,并在此基础上开发出了绿盲蝽的引诱剂配方,为绿盲蝽的绿色防控提供了新方法。

关键词：绿盲蝽 2-乙基己醇苯乙烯引诱剂

恶臭假单胞菌HB3S-20在棉花中的定殖及诱导抗性研究

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中国生物防治学报 2024年第1期40卷 117-125页

作者：金利容许冬王玲丛胜波李文静杨妮娜尹海辰黄薇万鹏农业农村部华中作物有害生物综合治理重点实验室/农作物重大病虫草害防控湖北省重点实验室/湖北省农业科学院植保土肥研究所武汉430064

植物内生菌是防治植物病害的重要生防资源。恶臭假单胞菌Pseudomonas putida HB3S-20是本实验室从棉花内生细菌中所筛选到的一株对棉花黄萎病具有显著防效的潜在生防菌株。本研究采用利福平抗性标记技术和绿色荧光蛋白(GFP)标记技术检... 详细信息

植物内生菌是防治植物病害的重要生防资源。恶臭假单胞菌Pseudomonas putida HB3S-20是本实验室从棉花内生细菌中所筛选到的一株对棉花黄萎病具有显著防效的潜在生防菌株。本研究采用利福平抗性标记技术和绿色荧光蛋白(GFP)标记技术检测了菌株HB3S-20在棉花组织中的定殖动态和定殖位点,并检测了菌株HB3S-20接种棉花植株后植物防御相关酶SOD、POD和CAT酶活性的变化。利福平标记试验结果表明,菌株HB3S-20主要定殖于根部,棉株接种菌株HB3S-20后第3~30 d检测到棉花根部内的菌量范围为2.2×10^(4)~6.7×10^(4)cfu/g,检测到棉花茎部内的菌量为0.04×104~2.7×10^(4)cfu/g,棉花茎部内的菌量低于根部,但在叶片中未被分离到。GFP标记试验结果表明,菌株HB3S-20不仅能附着在棉花根系表面,还能定殖在根部维管组织中。此外,菌株HB3S-20能够提高棉花中植物防御相关酶SOD和POD的活性,说明菌株HB3S-20能够诱导棉花植株的系统抗性,增强棉花抗病性。本研究初步揭示了恶臭假单胞菌HB3S-20在棉花组织内的定殖规律及其对棉株产生的诱导抗性,为菌株HB3S-20的防病机制研究提供了理论依据。

关键词：恶臭假单胞菌棉花定殖诱导抗性

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云木香内生细菌的分离鉴定及其对大丽轮枝菌的抑制作用

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植物保护 2024年第3期50卷 46-54页

作者：金利容许冬王玲丛胜波杨妮娜李文静尹海辰黄薇武怀恒万鹏农业农村部华中作物有害生物综合治理重点实验室农作物重大病虫草害防控湖北省重点实验室湖北省农业科学院植保土肥研究所武汉430064

从药用植物云木香中分离得到41株内生细菌,采用细菌16S rRNA基因测序的方法对这些菌株进行鉴定,结果显示,这些云木香内生细菌分别属于6个属,其中假单胞菌属Pseudomonas和拉恩氏菌属Rahnella为优势菌属。采用对峙培养方法对这些菌株进行... 详细信息

从药用植物云木香中分离得到41株内生细菌,采用细菌16S rRNA基因测序的方法对这些菌株进行鉴定,结果显示,这些云木香内生细菌分别属于6个属,其中假单胞菌属Pseudomonas和拉恩氏菌属Rahnella为优势菌属。采用对峙培养方法对这些菌株进行筛选,发现其中12株内生细菌对大丽轮枝菌Verticillium dahliae具有抑制作用,其中有2株属于拉恩氏菌属Rahnella,7株属于假单胞菌属Pseudomonas,3株属于沙雷氏菌属Serratia。12株内生细菌对棉花黄萎病的温室防效评估结果表明,假单胞菌属菌株R1-6、R1-13和S1-2对棉花黄萎病的温室防效达到55%以上,具有潜在的生产利用价值。

关键词：云木香内生细菌鉴定大丽轮枝菌抑菌活性

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Predicting Turbidite Channel in Deep-Water Canyon Based on Grey Relational Analysis-Support Vector Machine Model:A Case Study of the Lingshui Depression in Qiongdongnan Basin,South China Sea

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Energy Engineering 2024年第9期121卷 2435-2447页

作者： haichen Li Jianghai Li Li Li Zhandong Li School of Earth and Space Sciences Peking UniversityBeijing100871China Key Laboratory of Orogenic Belts and Crustal Evolution Peking UniversityBeijing100871China Geotechnical Physical and Mechanical Properties Laboratory Langfang Normal UniversityLangfang065000China Heilongjiang Northeast Petroleum University Science Park Development Co. Ltd.Daqing163318China College of Petroleum Engineering Northeast Petroleum UniversityDaqing163318China

The turbidite channel of South China Sea has been highly *** by the complex fault and the rapid phase change of lithofacies,predicting the channel through conventional seismic attributes is not accurate *** response to this disadvantage,this study used a method combining grey relational analysis(GRA)and support vectormachine(SVM)and established a set of prediction technical procedures suitable for reservoirs with complex geological *** the case study of the Huangliu Formation in Qiongdongnan Basin,South China Sea,this study first dimensionalized the conventional seismic attributes of Gas Layer Group I and then used the GRA method to obtain the main relational factors.A higher relational degree indicates a higher probability of responding to the attributes of the turbidite *** study then accumulated the optimized attributes with the highest relational factors to obtain a first-order accumulated sequence,which was used as the input training sample of the SVM model,thus successfully constructing the SVM turbidite channel *** results prove that the GRA-SVMmethod has a high drilling coincidence *** the core and logging data and taking full use of the advantages of seismic inversion in predicting the sand boundary of water channels,this study divides the sedimentary microfacies of the Huangliu Formation in the Lingshui 17-2 Gas *** comprehensive study has shown that the GRA-SVM method has high accuracy for predicting turbidite channels and can be used as a superior turbidite channel prediction method under complex geological conditions.

关键词： Support vector machine channel Huangliu Formation Qiongdongnan Basin

Research progress on electrolyte key salts for sodium-ion batteries

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Progress in Natural Science:Materials International 2024年第02期34卷 263-273页

作者： weimin Zhao Miao Wang haichen Lin Kangwoon Kim Rongkai He Shijie Feng Haodong Liu College of Chemical Engineering and Safety Binzhou University Center for Memory and Recording Research Building University of California San Diego STATE GRID Liaocheng Power Supply Company

Sodium-ion batteries(SIBs) are considered potential successors to lithium-ion batteries in the fields of energy storage and low-speed vehicles, thanks to their advantages such as abundant raw material sources, high energy density, and a wide operational temperature range. However, several scientific and engineering challenges still require attention in the development of sodium-ion batteries. Electrolyte salts, as a key component of sodium-ion battery electrolytes, play a critical role in battery performance. This paper provides a brief overview of the research progress on different electrolyte salt systems in sodium-ion batteries. It discusses characteristics such as ionic conductivity, electrochemical windows, electrochemical performance, and thermal safety in various solvent systems. Furthermore, the paper summarizes a series of strategies for controlling electrolyte and electrode interfaces, offering references for addressing the challenges in the mass production and application of sodium-ion batteries.

关键词： Electrochemical performance Electrolyte Electrolyte salts Sodium ion batteries

Hydrogen and nitrogen absorption properties of Ce-added Zr_(2)(Fe_(1-x)Ni_(x)) alloys

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Journal of Rare Earths 2024年第6期42卷 1136-1141,I0005页

作者： Kai yin Xiaopeng Liu State Key Laboratory of Advanced Materials for Smart Sensing GRINM Group Co.Ltd.Beijing10088China GRIMAT Engineering Institute Co. Ltd.Beijing101407China General Research Institute of Nonferrous Metals Beijing100088China

To improve the nitriding resistance of Zr_(2)Fe alloy,the Ce-added Zr_(2)(Fe_(1-x)Ni_(x))(x=0,0.15,0.3,0.5)alloys were prepared by magnetic levitation melting *** effects of Ni substitution for Fe on the phase structure,hydrogen and nitrogen absorption properties of the alloys were investigated by X-ray diffraction,scanning electron microscopy and p-c isotherm *** experimental results show that Ni substitution can effectively inhibit the formation of both α-Zr and ZrFe_(2) phases and promote the formation of C16 structure Zr_(2)(Fe,Ni)phase,causing Ni-substituted alloys to exhibit low nitrogen absorption rate and *** 623 K under 0.5 MPa nitrogen pressure,the nitrogen absorption capacity of Ce-added Zr_(2)(Fe_(0.5)Ni_(0.5))alloy reaches to 0.8 mL/g,much lower than that of Zr_(2)Fe alloy(1.5 mL/g).Ni substitution decreases the crystal cell volume of the C_(16)Zr_(2)(Fe,Ni)phase,resulting in an increase in the hydrogen absorption equilibrium *** 623 K under 0.05 MPa hydrogen pressure,the hydrogen absorption capacity decreases from 1.46 wt%of Zr_(2)Fe alloy to 1.41 wt%of Ce-added Zr_(2)(Fe_(0.5)Ni_(0.5))alloy.

关键词： Zr_(2)Fe alloy Ce Pressure-composition isotherm Hydrogen absorption Nitrogen absorption Rare earths

Rational surface charge engineering of haloalkane dehalogenase for boosting the enzymatic performance in organic solvent solutions

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Chinese Journal of Chemical Engineering 2024年第1期65卷 276-285页

作者： yin Wu Yan Sun Department of Biochemical Engineering School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology(Ministry of Education)Tianjin UniversityTianjin 300350China

Biocatalysis in organic solvents(OSs)has numerous important applications,but native enzymes in OSs often exhibit limited catalytic ***,we proposed a computation-aided surface charge engineering strategy to improve the catalytic performance of haloalkane dehalogenase DhaA in OSs based on the energetic analysis of substrate binding to the DhaA *** variants with enhanced OS resistance were obtained by replacing negative charged residues on the surface with positive charged residue(Arg).Particularly,a four-substitution variant E16R/E93R/E121R/E257R exhibited the best catalytic performance(five-fold improvement in OS resistance and seven-fold half-life increase in 40%(vol)dimethylsulfoxide).As a result,the overall catalytic performance of the variant could be at least 26 times higher than the wild-type *** spectroscopy and molecular dynamics simulation studies revealed that the residue substitution mainly enhanced OS resistance from four aspects:(a)improved the overall structural stability,(b)increased the hydrophobicity of the local microenvironment around the catalytic triad,(c)enriched the hydrophobic substrate around the enzyme molecule,and(d)lowered the contact frequency between OS molecules and the catalytic *** findings validate that computationaided surface charge engineering is an effective and ingenious rational strategy for tailoring enzyme performance in OSs.

关键词： Surface charge engineering Organic solvent resistance Molecular dynamics simulation Haloalkane dehalogenase

A generalized presentation of multi-caloric effects based on exterior derivative theory and its applications

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Communications in Theoretical Physics 2024年第8期76卷 156-163页

作者： Jun yin School of Materials Science and Engineering Nankai UniversityTianjin 300350China School of Mechanical Engineering and Automation Fuzhou UniversityFuzhou 350108China

The emerging concept of multi-caloric effects, introduced in 2010, entails the application of multiple interplay fields to a thermodynamic system. While multi-caloric effects are the main focus of experimental endeavors, theoretical considerations fall short of providing a thorough understanding. This paper introduces a comprehensive presentation on multi-caloric effects,employing the method and theory of exterior derivative formations. It addresses every aspect of thermodynamic systems, showcasing its applicability to multi-caloric materials(both singlephase and multi-phase materials), and its adaptability to different scenarios(either in single or multiple force fields). The formulation of Maxwell relationships, characterized by their generality and universality, enables a clear prediction in entropy and temperature, facilitating a distinct identification between independent and interdependent contributions from multi-caloric effects. These insights hold significant importance in designing and developing specialized thermodynamic materials, optimizing functional performances and exploring innovative mechanisms.

关键词： multicaloric effects Maxwell relations isothermal entropy adiabatic temperature