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Preparation of Low Ratio Magnesium Ccement by Acid Leaching Treatment of Boron Mud

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 120-129页

作者： YANG mei ZHANG Mingzhe CHEN Hao School of Materials Science and Engineering Shenyang Jianzhu UniversityShenyang 110168China School of Physical Science and Technology Shenyang Normal UniversityShenyang 110168China

The effects of liquid-solid ratio and reaction time on the leaching rate of magnesium at room temperature were investigated,as well as the effects of the molar ratio of MgO/MgCl_(2),the amount of water added,and the amount of acid-impregnated slag dosed on the compressive strength and water resistance of *** results showed that the magnesium element in the boron mud could be maximally leached under the conditions of 1:1 concentration of hydrochloric acid at room temperature,liquid-solid ratio of 2.5 mL·g^(-1),and reaction time of 5 h,and the main products were amorphous SiO_(2) as well as a small amount of magnesium olivine which had not been completely *** LR-MOC prepared using the acid-soaked mixture could reach a softening coefficient of 0.85 for 28 d of water immersion when the molar ratio of MgO/MgCl_(2) was 2.2,the amount of water added was 0 g,and the acid-soaked slag dosing was 40 wt%,which also led to an appreciable late-strength,with an increase of 19.4%in compressive strength at 28 d compared to that at 7 *** previous studies,LR-MOC prepared in this way has a final strength phase that is not the more easily hydrolysed 3-phase but the lath-like *** this phenomenon,we analyzed the mechanism and found that,during the acid leaching process,a part of amorphous SiO_(2) dissolved in the acid leaching solution formed a silica sol,in which Mg^(2+)played a bridging role to make the silica sol more *** the addition and hydrolysis of MgO,the silica sol gel coagulation slows down,providing a capping layer to inhibit the hydrolysis of the 5-phase crystals and providing some strength after *** amorphous SiO_(2) in the other part of the acid-impregnated slag generated M-S-H gel with Mg^(2+)and OH-,which synergised with the dense structure composed of interlocking crystals to improve the water resistance of LR-MOC.

关键词： boron mud magnesium chloride-oxygen cement acid immersion water resistance silica sol

以部分水解聚丙烯酰胺和原油为营养源的微生物筛选及性能评价

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石油学报 2003年第6期24卷 59-63页

作者：廖广志石梅李蔚侯兆伟韩培慧杨振宇大庆油田有限责任公司勘探开发研究院黑龙江大庆163712

在大庆油田,聚合物驱工业化推广应用取得了显著的经济效果,比水驱提高采收率10%以上,目前产油量已突破 107t/a,成为油田可持续发展的重大技术措施.尽管如此,聚合物驱后油层中仍剩有50%的原油未被采出.针对大庆油田聚合物驱后油层的物化... 详细信息

在大庆油田,聚合物驱工业化推广应用取得了显著的经济效果,比水驱提高采收率10%以上,目前产油量已突破 107t/a,成为油田可持续发展的重大技术措施.尽管如此,聚合物驱后油层中仍剩有50%的原油未被采出.针对大庆油田聚合物驱后油层的物化环境,筛选出了以聚合物和原油为营养源增油的菌种.并对其性能进行了系统的评价.物理模拟驱油实验结果表明,聚合物驱后单独微生物驱可提高采收率5%,微生物驱与化学驱结合可提高采收率16%.

关键词：聚合物驱微生物驱部分水解聚丙烯酰胺物理模拟驱油实验菌种性能评价采收率

[Solid-phase extraction coupled with high performance liquid chromatography-triple quadrupole mass spectrometry for simultaneous determination of seven coumarins in water samples from drinking water treatment plants]

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Se pu = Chinese journal of chromatography 2025年第1期43卷 78-86页

作者： Wen-mei Jiao Jing-Ming Yang Ce Xu Fu-Kang Gao Lu-Yao Shen Yu-Bo Yuan zhi-Fen Guo guang Huang School of Life Sciences and Chemical Engineering Jiangsu Second Normal University Nanjing 211200 China. School of Stomatology Nanjing Medical University Nanjing 210029 China. School of Public Health Nanjing Medical University Nanjing 211166 China. Key Laboratory of Modern Toxicology Ministry of Education School of Public Health Nanjing Medical University Nanjing 211166 China.

Chlorinated coumarins, which are as cytotoxic as highly toxic halobenzoquinones toward CHO-K1 cells, have recently been identified as disinfection byproducts in drinking water disinfection processes. Therefore, detecting coumarins in water samples collected at various stages from drinking water treatment plants helps assess the formation of chlorinated coumarins in drinking water. Hence, a simple, rapid, accurate, and sensitive method for quantifying coumarins in water samples is required. In this study, a method was developed based on solid-phase extraction coupled with high performance liquid chromatography-triple-quadrupole mass spectrometry for analyzing seven coumarins in water samples from drinking water treatment plants, including 6,7-dihydroxycoumarin, 7-hydroxycoumarin, 6-hydroxy-4-methylcoumarin, 8-chloro-7-hydroxycoumarin, coumarin, 7-chloro-6-hydroxy-4-methylcoumarin, and 3,8-dichloro-7-hydroxycoumarin. Sample pretreatment involved solid-phase extraction using HLB columns, followed by elution with water and methanol, each containing 0.25% formic acid. The extracted solution was separated via gradient elution using a Phenomenex Luna C18 column (100 mm×2.0 mm, 3 mm) with 0.1% formic acid aqueous solution and methanol as the mobile phases, with analytes detected by triple-quadrupole mass spectrometry equipped with electrospray ionization source in multiple reaction monitoring mode. The matrix effect, precision, and accuracy of the developed method were investigated using raw and treated water as matrices. Matrix effects of 0.84-1.12 were recorded for the detection of 6,7-dihydroxycoumarin, 7-hydroxycoumarin, 6-hydroxy-4-methylcoumarin, and coumarin in raw water, while values of 0.67-0.70 were recorded for 8-chloro-7-hydroxycoumarin, 7-chloro-6-hydroxy-4-methylcoumarin, and 3,8-dichloro-7-hydroxycoumarin in finished water. The three chlorinated coumarins exhibited matrix effects above 0.80 after the finished water matrix had been diluted four times. These re

关键词： coumarins disinfection byproducts drinking water high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) solid-phase extraction (SPE)

传染性喉气管炎病毒gB基因和新城疫病毒F基因在重组禽痘病毒中共表达

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生物工程学报 2004年第6期20卷 963-966页

作者：智海东王云峰童光志王玫张绍杰中国农业科学院哈尔滨兽医研究所兽医生物技术国家重点实验室哈尔滨150001

在重组禽痘病毒中表达多个禽类病原的主要免疫原基因是构建多价基因工程疫苗的前提 ,但相关研究很少。在表达传染性喉气管炎病毒 (ILTV)gB基因重组禽痘病毒的转移载体的基础上 ,构建了含有ILTVgB基因和新城疫病毒 (NDV)F基因的重组禽痘... 详细信息

在重组禽痘病毒中表达多个禽类病原的主要免疫原基因是构建多价基因工程疫苗的前提 ,但相关研究很少。在表达传染性喉气管炎病毒 (ILTV)gB基因重组禽痘病毒的转移载体的基础上 ,构建了含有ILTVgB基因和新城疫病毒 (NDV)F基因的重组禽痘病毒转移载体pSY gB F ,采用脂质体转染禽痘病毒感染的鸡胚成纤维 (CEF)细胞后 ,通过蓝斑试验筛选出重组禽痘病毒 (rFPV gB F) ,并进行了 6轮蚀斑纯化。Western blot试验和间接免疫荧光试验证明ILTVgB基因和NDVF基因在rFPV gB F感染的CEF细胞中获得表达。为传染性喉气管炎、新城疫与鸡痘活载体多价疫苗的研制奠定基础。

关键词：传染性喉气管炎病毒糖蛋白B 新城疫病毒融合蛋白重组禽痘病毒

MixerKT:A Knowledge Tracing Model Based on Pure MLP Architecture

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Computers, Materials & Continua 2025年第1期82卷 485-498页

作者： Jun Wang Mingjie Wang Zijie Li Ken Chen Jiatian mei Shu Zhang Key Laboratory of Education Informatization for Nationalities Ministry of EducationYunnan Normal UniversityKunming650000China Yunnan Key Laboratory of Smart Education Yunnan Normal UniversityKunming650000China

In the field of intelligent education,the integration of artificial intelligence,especially deep learning technologies,has garnered significant *** tracing(KT)plays a pivotal role in this field by predicting students’future performance through the analysis of historical interaction data,thereby assisting educators in evaluating knowledgemastery and tailoring instructional *** knowledge tracingmethods,largely based on Recurrent Neural Networks(RNNs)and Transformer models,primarily focus on capturing long-term interaction patterns in sequential ***,these models may neglect crucial short-term dynamics and other relevant *** paper introduces a novel approach to knowledge tracing by leveraging a pure Multilayer Perceptron(MLP)*** proposeMixerKT,a knowledge tracing model based on theHyperMixer framework,which uniquely integrates global and localMixer feature *** architecture enables more effective extraction of both long-terminteraction trends and recent learning behaviors,addressing limitations in currentmodels thatmay overlook these key *** evaluations on twowidely-used datasets,ASSIS Tments2009 and Algebra2005,demonstrate that MixerKT consistently outperforms several state-of-the-art models,including DKT,SAKT,and Separated Self-Attentive Neural Knowledge Tracing(SAINT).Specifically,MixerKT achieves higher prediction accuracy,highlighting its effectiveness in capturing the nuances of learners’knowledge *** results indicate that our model provides a more comprehensive representation of student learning patterns,enhancing the ability to predict future performance with greater precision.

关键词： Knowledge tracing multilayer perceptron channel mixer sequence mixer

Multi-model ensemble learning for battery state-of-health estimation:Recent advances and perspectives

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Journal of Energy Chemistry 2025年第1期100卷 739-759页

作者： Chuanping Lin Jun Xu Delong Jiang Jiayang Hou Ying Liang Zhongyue Zou Xuesong mei State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Shaanxi Key Laboratory of Intelligent Robots School of Mechanical Engineering Xi'an Jiaotong University Department of Electrical Engineering and Automation Luoyang Institute of Science and Technology School of Mechanical Engineering Hangzhou Dianzi University

The burgeoning market for lithium-ion batteries has stimulated a growing need for more reliable battery performance monitoring. Accurate state-of-health(SOH) estimation is critical for ensuring battery operational performance. Despite numerous data-driven methods reported in existing research for battery SOH estimation, these methods often exhibit inconsistent performance across different application scenarios. To address this issue and overcome the performance limitations of individual data-driven models,integrating multiple models for SOH estimation has received considerable attention. Ensemble learning(EL) typically leverages the strengths of multiple base models to achieve more robust and accurate outputs. However, the lack of a clear review of current research hinders the further development of ensemble methods in SOH estimation. Therefore, this paper comprehensively reviews multi-model ensemble learning methods for battery SOH estimation. First, existing ensemble methods are systematically categorized into 6 classes based on their combination strategies. Different realizations and underlying connections are meticulously analyzed for each category of EL methods, highlighting distinctions, innovations, and typical applications. Subsequently, these ensemble methods are comprehensively compared in terms of base models, combination strategies, and publication trends. Evaluations across 6 dimensions underscore the outstanding performance of stacking-based ensemble methods. Following this, these ensemble methods are further inspected from the perspectives of weighted ensemble and diversity, aiming to inspire potential approaches for enhancing ensemble performance. Moreover, addressing challenges such as base model selection, measuring model robustness and uncertainty, and interpretability of ensemble models in practical applications is emphasized. Finally, future research prospects are outlined, specifically noting that deep learning ensemble is poised to advance ens

关键词： Contrastive Learning

Terpenes from Schisandra sphenanthera

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Terpenes from Schisandra sphenanthera

Electrochemical performance of a nano SnO_2-modified LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode material

2010年全国中药学术研讨会

作者： Yan Jiang~a,zhi-Nan mei~a,guang -Zhong Yang~(*a),Mao-Chuan Liao~a,Yu Chen~b a Laboratory for Natural Product Chemistry,College of Pharmacy,South Central University for Nationalities,Wuhan 430074,P.R.China b College of Chemistry and Material Sciences,South Central University for Nationalities,Wuhan 430074,P.R.China

One novel highly oxygenated nortriterpenoid,schintrilactone C,and four known compounds,were isolated from the rattan of Schisandra *** structures were determined by analysis of 1D and 2D NMR spectroscopic *** C is the third example of Wuweiziartane-type skeleton nortriterpenoids,bearing a modified five-membered D ring and aδ-lactone E ring and a spirocyclic moiety at the C(13) side chain.

关键词： Schisandra sphenanthea Terpene Nortriterpenoid Schintrilactone

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Chinese Chemical Letters 2015年第11期26卷 1403-1408页

作者： zhi-mei Luo Yan-guang Sun Hui-Yong Liu School of Chemical Engineering Fuzhou University

The nano SnO2-modified LiNi1/3Co1/3Mn1/3O2 was successfully prepared by a carrier transfer method. The pristine and modified samples were characterized with various techniques such as XRD, SEM, XPS and EDS. The results showed that the SnO2particles did not enter the crystal structure of LiNi1/3Co1/3Mn1/3O2, many nano SnO2 particles were uniformly covered on the surface of LiNi1/3Co1/3Mn1/3O2 and the modified thin layer could inhibit the dissolution of transition metal oxides. The electrochemical tests indicated that the existence of nano SnO2 could improve the discharge capacity and rate capability owing to the decreased interfacial polarization, The cycling stability was remarkably improved at room temperature and 55 ℃. The XRD patterns of the fresh NCM electrode and after 50 cycles proved that the structural change of NCM was not so effective on the capacity fade.

关键词： Carrier transfer methodNano SnO2LiNi1/3Co1/3Mn1/3O2Surface modification

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新质人才需求背景下学校教育供给变革研究

教学与管理 2025年第1期 15-18页

作者：孟志远李永梅曲阜师范大学教育学院山东曲阜273165

新质生产力的蓬勃发展呼唤新质人才并为其培养提供了重要的时域与场域,面向新质人才需求的学校教育供给变革成为教育的基础性命题。当前面向新质人才需求的学校供给变革存在“传统型”供给主体与“新质型”主体需求、“标准化”供给内... 详细信息

新质生产力的蓬勃发展呼唤新质人才并为其培养提供了重要的时域与场域,面向新质人才需求的学校教育供给变革成为教育的基础性命题。当前面向新质人才需求的学校供给变革存在“传统型”供给主体与“新质型”主体需求、“标准化”供给内容与“个性化”内容需求、“统一性”供给方式与“数智化”方式需求之间的矛盾。鉴于此,提出面向新质人才需求的学校教育供给遵循从“人类教师主体”到“人机智能联合主体”、从“统一与他主内容”到“开放与自主内容”、从“前置性预设方式”到“发展性按需方式”的变革理路,以期为学校教育供给变革与新质人才培养提供一定的理论借鉴和实践启示。

关键词：学校教育供给变革新质人才需求新质生产力新质人才培养