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基于博弈组合赋权-云模型的坚硬顶板采场来压强度等级评估研究

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矿业安全与环保 2024年第2期51卷 98-105,110页

作者：张向阳孔冉李修冠童治鹏安徽理工大学矿业工程学院安徽淮南232001

为了解决坚硬顶板采场来压强度等级评估的不确定性问题,在力学分析的基础上,从顶板条件、地质条件、开采条件和其他条件等4个方面选取14个指标因素,采用序关系法确定主观权重、改进的CRITIC法确定客观权重,运用博弈论组合赋权,得到最佳... 详细信息

为了解决坚硬顶板采场来压强度等级评估的不确定性问题,在力学分析的基础上,从顶板条件、地质条件、开采条件和其他条件等4个方面选取14个指标因素,采用序关系法确定主观权重、改进的CRITIC法确定客观权重,运用博弈论组合赋权,得到最佳综合权重,构建坚硬顶板采场来压强度等级评估云模型。通过云相似度测算,提高评估结果的精确性。以淮南张集矿区11129工作面为例,对9-2煤层上覆坚硬顶板来压强度等级进行评估,应用表明:所提方法综合考虑评价对象的主客观因素,权重分配科学合理,评估结果与实际情况一致,能为现场顶板弱化工作提供理论依据。

关键词：坚硬顶板来压强度等级评估组合赋权博弈论云模型云相似度

重稀土掺杂烧结钕铁硼磁体的晶界调控研究进展

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稀土 2024年第2期45卷 31-40页

作者：孔梦燃田晓王瑜夏峰孙彩娜姚占全内蒙古师范大学物理与电子信息学院功能材料物理与化学自治区重点实验室内蒙古呼和浩特010022 内蒙古师范大学稀土功能和新能源储能材料内蒙古自治区工程研究中心内蒙古呼和浩特010022 包头金山磁材有限公司内蒙古包头014020 内蒙古农业大学水利与土木建筑工程学院内蒙古呼和浩特010018

随着低碳经济的提出,烧结钕铁硼磁体作为新能源汽车及其他高新技术的核心材料越来越受到人们的关注,同时对其性能也提出了更高的要求,高矫顽力、高剩磁和大磁能积的永磁体成为人们追求的目标。烧结钕铁硼磁体的磁性能与微观结构中晶界... 详细信息

随着低碳经济的提出,烧结钕铁硼磁体作为新能源汽车及其他高新技术的核心材料越来越受到人们的关注,同时对其性能也提出了更高的要求,高矫顽力、高剩磁和大磁能积的永磁体成为人们追求的目标。烧结钕铁硼磁体的磁性能与微观结构中晶界成分、分布以及体积分数等密切相关。利用新型工艺在合金中掺杂重稀土可以很好地调控磁体的微观结构,从而在保持剩磁不变的基础上,提高磁体的矫顽力和磁能积。本文在详细介绍两种新型掺杂技术的基础上,梳理了近几十年来国内外通过掺杂重稀土金属、重稀土化合物及重稀土合金来调控磁体晶界结构、提高磁体矫顽力方面的最新研究成果,为进一步提高烧结钕铁硼磁体性能提供参考。

关键词：烧结钕铁硼重稀土掺杂晶界扩散晶界调控

Non-dispersive solvent extraction ofp-toluic acid from purifiedterephthalic acid plant wastewater with p-xylene as extractant

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2016年第10期17卷 828-840页

作者： Qing-ran kong You-wei CHENG Li-jun WANG Xi LI College of Chemieal and Biological Engineering Zhejiang University Hangzhou 310027 China

Non-dispersive solvent extraction （NDSE） with p-xylene as extractant was employed as a novel separation methodto recover both ρ-toluic （PT） acid and water from purified terephthalic acid （PTA） wastewater. The mass transport behavior ofPT acid from aqueous solution to ρ-xylene was investigated by experiments and numerical simulation. Experiments showed thatNDSE is feasible and effective. Residual PT acid in the raffinate can be reduced to lower than the permitted limit of wastewaterre-use （100 g/m^3） with extraction time longer than 60 s in industrial conditions. A mathematical model of PT acid mass transportwas developed to optimize the membrane module performance. The model was validated with the experimental results withrelative errors of less than 6%. Numerical analysis for mass transfer through the lumen side, the porous membrane layer, and theshell side showed that PT acid transport in the aqueous solution is the rate determining step. The effects of the membrane andoperating parameters on membrane module performance were investigated by means of computational simulations. The keyparameters suggested for industrial NDSE design are： fiber inner radius r1=200-250 μm, extraction time tc=50-60 s, aqueous/organic volumetric ratio a/o=9.0, and temperature T-318 K.

关键词： Non-dispersive solvent extraction (NDSE), Purified terephthalie acid (PTA) wastewater, p-toluic (PT) acid,ρ-xylene (PX), Mass transfer

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甘蔗高光效新品种筛选与光合潜力分析

热带作物学报 2024年第3期45卷 495-502页

作者：安东升聂虎子刘洋赵宝山严程明孔冉苏俊波中国热带农业科学院南亚热带作物研究所/广东省旱作节水农业工程技术研究中心广东湛江524091 广东省农业技术推广中心广东广州510515 嘉兴职业技术学院浙江嘉兴314036 国家农业绿色发展长期固定观测湛江试验站广东湛江524091

筛选高光效甘蔗新品种并评价其光合潜力可为糖料蔗高质量发展及维护食糖供给安全提供保障。本研究采用叶绿素荧光技术快速测定3个经典的商业主栽品种和10个甘蔗新品种的光反应和暗反应参数,计算基于Lake-model的叶绿素荧光参数,同时用... 详细信息

筛选高光效甘蔗新品种并评价其光合潜力可为糖料蔗高质量发展及维护食糖供给安全提供保障。本研究采用叶绿素荧光技术快速测定3个经典的商业主栽品种和10个甘蔗新品种的光反应和暗反应参数,计算基于Lake-model的叶绿素荧光参数,同时用光合电子流(J)对光响应的机理模型拟合光响应曲线,对阴天和晴天下不同甘蔗品种光合电子传递特征参数进行比较分析。结果表明:低光和高光下光能在光合电子传递与可调节性能量耗散(ΦNPQ)之间达到平衡,只有在中光下非调节性能量耗散(ΦNO)在不同品种间出现差异,但这并不代表出现光损伤,而是由于不同甘蔗品种的能量分配在光合有效辐射(PAR)增加的过程中呈现出差异化的过渡模式。所有品种在阴天的初始光能利用率(αe)均高于晴天,但在相同PAR下阴天的光合电子流远低于晴天。热甘16117和热甘1997分别在阴天和晴天的光量子效率(ΦII)最高,热甘16239虽然在中、低光下光量子效率不及ROC22和热甘1997,但其在中光下非调节性能量耗散最低,且在高光下具有较强的饱和光强(PARsat)和最大电子传递速率(Jmax),同时光量子效率与ROC22、热甘1997差异不显著。而基于近5 a试验地阴天和晴天权重占比计算的总和光合电子传递能力指数由大到小依次为:热甘1997(21.93)>ROC22(21.43)>ROC16(20.62)>热甘16239(20.27)>桂柳05136(19.43)>热甘11713(19.30)>热甘1462(19.29)>热甘14291(19.03)>热甘16117(18.94)>热甘1339(18.93)>热甘1876(18.08)>热甘1(17.41)>热甘11559(16.84)。综上,热甘1997和热甘16239可作为甘蔗高光效新品种。

关键词：甘蔗高光效新品种筛选光合潜力

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甘蔗间作系统生产力分析及适宜品种筛选

中国农业科技导报 2024年第4期26卷 37-45页

作者：安东升严程明刘洋赵宝山孔冉苏俊波徐志军中国热带农业科学院南亚热带作物研究所国家农业绿色发展长期固定观测湛江试验站广东湛江524091 中国热带农业科学院湛江实验站广东省级现代农业(耕地保育与节水农业)产业技术研发中心广东湛江524013 嘉兴职业技术学院浙江嘉兴314036

为提升机械化宽行植蔗区土地利用效率,实现封行前控草减药与增效增收,以甘蔗单作为对照,选择7个花生品种和5个甜玉米品种开展配套农机的甘蔗宽行间作花生和甜玉米试验,对2种间作系统生产力与经济效益进行比较分析。结果表明,总体上甘蔗... 详细信息

为提升机械化宽行植蔗区土地利用效率,实现封行前控草减药与增效增收,以甘蔗单作为对照,选择7个花生品种和5个甜玉米品种开展配套农机的甘蔗宽行间作花生和甜玉米试验,对2种间作系统生产力与经济效益进行比较分析。结果表明,总体上甘蔗的株高与行间间作甜玉米的株高呈负相关,与行间间种花生的株高呈正相关。与甘蔗单作相比,间种花生的甘蔗单茎重无显著下降,间种甜玉米的甘蔗单茎重显著下降;2种间作模式下甘蔗的分蘖数、有效茎数和产量均显著下降,下降幅度均表现为间作甜玉米显著高于间作花生;不同间作模式对甘蔗田间糖锤度的影响不显著。间作甜玉米的田间糖锤度和穗产量分别以‘中农甜414’和‘华美甜9’最优,间作‘粤甜28’能够收获较高的产量和农田秸秆输入量;间作‘湛油1155’‘热红1’和‘湛油1155’‘湛油75’‘湛油62’分别获得最优的花生仁产量和出油率。间作系统纯收益增幅在30%以上的处理表现为间作‘中农甜414’>‘华美甜9’>‘ZGP113’>‘湛油1155’,但间作‘华美甜9’和‘ZGP113’的甘蔗减产率分别比间作‘中农甜414’和‘湛油1155’提高13.73和4.37个百分点,因此适宜间作的甜玉米和花生品种分别为‘中农甜414’和‘湛油1155’。综上,间作‘中农甜414’甜玉米能够显著增加经济效益,且农田秸秆碳输入量大,但甘蔗显著减产,若不能扩大种植面积则不利于保守糖料红线;间作‘湛油1155’和‘ZGP113’能够显著增加经济效益,甘蔗产量降幅较小,且豆科固氮与秸秆碳输入有助于耕地质量提升。

关键词：甘蔗间作甜玉米花生生产力适宜品种

High-temperature Thermo-oxidative Aging of Vulcanized Natural Rubber Nanocomposites:Evolution of Microstructure and Mechanical Properties

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Chinese Journal of Polymer Science 2023年第8期41卷 1287-1297,I0010页

作者： Zhou-Xian Li Yi-ran kong Xiang-Fei Chen Ya-Jiang Huang Ya-Dong Lv Guang-Xian Li College of polymer science and engineering State key laboratory of polymer materials engineering of ChinaSichuan UniversityChengdu 610065China

The aging of natural rubber(NR)at high temperatures will seriously affect its service lifetime in many key *** the present work,the changes in microstructure and mechanical properties of semi-efficient vulcanized NR/carbon black(CB)vulcanizates during thermooxidative aging at high temperatures(150-200℃)and a moderate temperature(95℃)were *** high temperatures,a two-stage aging behavior,which was characteristic of a first rapid decline and then a continuous rise in the crosslinking density(ve),was identified and was found to be closely related to the depletion behavior of *** surface cracking behavior observed in the second stage of high-temperature aging was discussed in terms of the grafting reaction of macromolecular radicals on CB particles and thermal *** contrast,the aging of NR at moderate temperatures was much mild,which featured a continuous increase in ve and an oxidation mechanism dominated by peroxy radicals attacking double *** general,the mechanical properties of NR vulcanizates during high-temperature aging depended on the competition effects of structural evolution in the crosslinked network and oxidation-induced chain scission.

关键词： Natural rubber nanocomposites High-temperature Thermo-oxidative aging

Copolymer-assisted Polypropylene Separator for Fast and Uniform Lithium Ion Transport in Lithium-ion Batteries

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Chinese Journal of Polymer Science 2020年第12期38卷 1313-1324页

作者： Yan Yan Qing-ran kong Chuang-Chao Sun Jia-Jia Yuan Zheng Huang Li-Feng Fang Bao-Ku Zhua You-Zhi Song Key Laboratory of Macromolecule Synthesis and Functionalization(Ministry of Education) ERC of Membrane and Water Treatment(Ministry of Education)Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China Institute ofNuclear and New Energy Technology Tsinghua UniversityBeijing W0084China

In lithium-ion batteries(LIBs),separators play a vital role in lithium-ion(Li+)transport,and thus affect rate performance,battery life,and ***,a new kind of multifunctional copolymer poly(acrylonitrile-co-lithium acrylate-co-butyl acrylate)(PAAB-Li)is synthesized through soap-free emulsion polymerization,and is used to form homogeneous-covered separator based on PP matrix by a simple dip-annealing *** to the bare PP separator,the modified separators with PAAB-Li enable higher ionic conductivity,higher lithium ion transference number(increased from 0.360 to 0.525),and lower interface impedance(reduced from 155Ω to 34Ω).It has been indicated that PAAB-Li functional layer significantly promotes the fast transport of Li+and improves the compatibility of the separator/electrolyte-electrode *** LiCo02/graphite cells with the PAAB-Li-assisted separator demonstrate excellent cycle stability and rate *** addition,the Li symmetric cells with the modified separator stably cycle over 800 h,indicating the functional layer effectively suppresses the lithium dendrite *** facile strategy can be easily applied to LIBs requiring high safety and even be scalable to Li metal ***,the possible mechanism of the PAAB-Li functional layer promoting fast and uniform Li+transport is discussed in this paper.

关键词： Polyelectrolytes Polypropylene separator Lithium ion transport Dendrite-free Lithium-ion battery

Quercetin induced HepG2 cells apoptosis through ATM/JNK/STAT3 signaling pathways

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BIOCELL 2023年第1期47卷 187-194页

作者： WANTONG LIU DANYANG CHEN JINGYAO SU RUILIN ZHENG ran kong BING ZHU HAO DONG YINGHUA LI Center Laboratory Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangzhou510120China College of Light Industry and Food Sciences Innovation Research Institute of Modern Agricultural EngineeringZhongkai University of Agriculture and EngineeringGuangzhou510225China

Liver cancer is the seventh most common malignant tumor in the world and is the second highest cause of death due to ***,a flavonoid with low toxicity,widely exists in various fruits and *** has the potential to be a therapeutic agent against various *** study aimed to demonstrate the anti-tumor effect of quercetin on HepG2 *** suppressed the HepG2 cell proliferation in a dose-dependent manner in cell viability *** of cell apoptosis was confirmed by apoptotic cells population(sub-G1 peak)detected by flow cytometer.A decrease in mitochondrial membrane potential and caspase-3 activation were also demonstrated in this ***,quercetin induced HepG2 cell apoptosis through ROS-mediated phosphorylated ataxia-telangiectasia mutated,c-Jun Nterminal kinases,signal transducer,and activator of transcription 3(STAT-3),and Bax signaling *** results suggest that quercetin has the potential to become an effective drug against the tumor.

关键词： Quercetin Caspase-3 Reactive oxygen species Apoptosis

Observation of Atomic Dynamic Behaviors in the Evaporative Cooling by In-Situ Imaging the Plugged Hole of Ultracold Atoms

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Chinese Physics Letters 2018年第8期35卷 58-61页

作者： Tian-You Gao Dong-Fang Zhang Ling-ran kong Rui-Zong Li Kai-Jun Jiang State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071 Center for Cold Atom Physics Chinese Academy of SciencesWuhan 430071 University of Chinese Academy of Sciences Beijing 100049

We experimentally observe the dynamic evolution of atoms in the evaporative cooling, by in-situ imaging the plugged hole of ultracold atoms. Ultracold rubidium atoms confined in a magnetic trap are plugged using a blue-detuned laser beam with a waist of 20 m at a wavelength of 767 nm. We probe the variation of the atomic temperature and width versus the radio frequency in the evaporative cooling. Both the behaviors are in good agreement with the calculation of the trapping potential dressed by the rf signal above the threshold temperature,while deviating from the calculation near the phase transition. To accurately obtain the atomic width, we use the plugged hole as the reference to optimize the optical imaging system by precisely minimizing the artificial structures due to the defocus effect.

关键词： Observation of Atomic Dynamic Behaviors in the Evaporative Cooling by In-Situ Imaging the Plugged Hole of Ultracold Atoms