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Yolk-shell nanoarchitecture for stabilizing a Ce_(2)S_(3)anode

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Carbon Energy 2021年第5期3卷 709-720页

作者： Kanglong Hui Jipeng Fu Jie Liu Yongjin Chen Xiang gao tian gao Qi Wei Chengyu Li Hongjie Zhang Mingxue Tang Center for High Pressure Science and Technology Advanced Research BeijingChina Department of Physics Shanghai University of Electric PowerShanghaiChina Institute of Optoelectronic Materials and Devices China Jiliang UniversityHangzhouChina College of Materials Science and Engineering Beijing University of TechnologyBeijingChina Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchunChina

Rare-earth sulfides are of research interest for lithium-ion batteries(LIBs)due to their abundant lithium intercalation sites and low redox voltage.However,their electrochemical performances are not satisfactory because of poor conductivity and volume change upon electrochemical cycling.Herein,nanoarchitectures ofγ-Ce_(2)S_(3)encapsulated in a hollow mesoporous carbon nanosphere(Ce_(2)S_(3)@HMCS)are fabricated using the self-template strategy combined with the in-sphere sulfuration method and tested as an LIB anode.The void space between the Ce_(2)S_(3)core and the outer layer of the carbon nanosphere has been properly designed and modulated to achieve excellent electrochemical performance in terms of electronic conductivity,reversibility,and rate capability.The reversible capacity of Ce_(2)S_(3)@HMCS is 2.6 times that of the pure Ce_(2)S_(3)anode,which can gradually increase and maintain a capacity of 282 mAh·g^(−1)at a current density of 1 A·g^(-1),and a high Coulombic efficiency(~100%)can be achieved even after 1000 cycles.This good performance is attributed to the unique yolk-shell nanostructure with a highly crystallized and stable Ce3S2 core and volume expansion buffer space upon lithiation/delithiation.Ex situ X-ray diffraction and nuclear magnetic resonance results indicate that the lithiation of Ce_(2)S_(3)@HMCS is an intercalation process.This study represents an important advancement in precise structural design with in-sphere sulfuration and sheds light on a potential direction for highperformance lithium storage.

关键词： Ce_(2)S_(3)anode intercalation mechanism lithium ion batteries structure stabilizing yolk-shell nanoarchitecture

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厌氧铁氨氧化的启动运行与脱氮机理

中国给水排水 2024年第5期40卷 69-74页

作者：王冰高天一王丽鑫沈阳建筑大学市政与环境工程学院辽宁沈阳110000

为解决传统生物脱氮工艺在污水处理过程中耗能大、成本高及含铁废水脱氮效果不佳的问题,在厌氧序批式反应器(ASBR)内通过梯度提升Fe3+浓度的方式诱导厌氧铁氨氧化(Feammox)反应的发生。对Feammox启动过程中氮浓度变化、铁价态变化及稳... 详细信息

为解决传统生物脱氮工艺在污水处理过程中耗能大、成本高及含铁废水脱氮效果不佳的问题,在厌氧序批式反应器(ASBR)内通过梯度提升Fe3+浓度的方式诱导厌氧铁氨氧化(Feammox)反应的发生。对Feammox启动过程中氮浓度变化、铁价态变化及稳定运行中微生物群落等进行了分析;同时,设置不同对照组实验进行同位素示踪以推测Feammox的反应途径,并分析进水COD浓度对Feammox性能的影响。结果表明,经过为期90 d的Feammox系统启动运行,氨氮去除率为53.03%;Feammox系统中氮元素的去除是由Feammox、厌氧氨氧化(Anammox)和硝酸盐依赖性铁氧化(NDFO)3种反应共同完成的;在Feammox系统稳定运行阶段,脱氮效果较好,实现了铁的循环,这为采用该技术处理高铁含氮废水提供了理论依据。

关键词：厌氧铁氨氧化脱氮机理启动运行同位素示踪

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两级GM制冷机数值模拟与分析

低温工程 2024年第3期 20-27页

作者：陈鑫植晓琴韦涛高天邱利民浙江大学制冷与低温研究所杭州310027

采用Sage软件建立了两级GM制冷机整机数值模型,并通过实验结果进行了验证。基于数值模型和?分析方法,分析了不同制冷温度下压缩机、旋转阀与冷头的损失分布。结果表明,损失主要发生在压缩机和旋转阀上。冷头的损失随着制冷温度的降低而... 详细信息

采用Sage软件建立了两级GM制冷机整机数值模型,并通过实验结果进行了验证。基于数值模型和?分析方法,分析了不同制冷温度下压缩机、旋转阀与冷头的损失分布。结果表明,损失主要发生在压缩机和旋转阀上。冷头的损失随着制冷温度的降低而增加,在4.2 K时36%的损失发生在冷头上,其中61%的冷头损失是由于实际气体效应引起。压缩机、旋转阀和回热器的低效性以及实际气体效应主导了制冷机的损失,导致制冷机效率低下。

关键词： GM制冷机数值模拟 ?分析液氦温区

Development and Application of a Heating Remote Monitoring System Based on KingSCADA

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Fluid Dynamics & Materials Processing 2021年第6期17卷 1179-1193页

作者： Chunlei Liu tian gao Chen Wang Peiqi Wang Limin Wang Yi Wang Yong Sun Department of Energy Engineering Hebei University of ArchitectureZhangjiakou075000China

A remote monitoring system for a secondary heating pipe network is designed on the basis of the KingSCADA software.Remote data communication is implemented through the IP mapping technology.Remote data are sorted through IOServer,and the remote monitoring of the pipe network unit port return is implemented accordingly.Using data such as water temperature and pressure of the water supply and return pipes,valve opening can be remotely adjusted to optimize the performances of the network to meet user needs in real time.The research results show that this remote monitoring system displays a reasonable degree of stability and efficiency in remote communication.

关键词： Heating regulation remote monitoring data acquisition IP mapping

芫荽精油对桃蚜的杀虫活性及其保护酶和解毒酶活性的影响

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昆虫学报 2024年第3期67卷 366-373页

作者：王泽华杨帆高恬恬张道丰于秋月高梦瑶王山宁北京市农林科学院植物保护研究所农业农村部北方果蔬有害生物绿色防控重点实验室(部省共建)北京100097 枣庄学院生命科学学院枣庄277160 沈阳农业大学植物保护学院沈阳110866

【目的】探究芫荽Coriandrum sativum精油对桃蚜Myzus persicae的生物活性和对吡虫啉的增效作用,以及桃蚜对芫荽精油胁迫的响应机制。【方法】分别测定芫荽籽精油和芫荽叶精油对桃蚜成蚜的24 h熏蒸活性(精油浓度为200,100,50,25,12.5和6... 详细信息

【目的】探究芫荽Coriandrum sativum精油对桃蚜Myzus persicae的生物活性和对吡虫啉的增效作用,以及桃蚜对芫荽精油胁迫的响应机制。【方法】分别测定芫荽籽精油和芫荽叶精油对桃蚜成蚜的24 h熏蒸活性(精油浓度为200,100,50,25,12.5和6.25μL/mL)和触杀活性(精油浓度为12.5,6.25,3.125,1.563和0.781μL/mL)半致死浓度(median lethal concentration,LC_(50))值;配制浓度为4.0,2.0,1.0,0.5和0.25 mg/L的吡虫啉,分别添加体积分数为0.05%的芫荽叶精油和芫荽籽精油,采用浸叶法处理桃蚜成蚜,48 h时检测芫荽叶精油和芫荽籽精油对吡虫啉的增效作用;检测LC_(50)浓度芫荽叶精油和芫荽籽精油触杀处理桃蚜成蚜48 h时保护酶超氧化物歧化酶(superoxide dismutase,SOD)、过氧化氢酶(catalase,CAT)和过氧化物酶(peroxidase,POD),解毒酶羧酸酯酶(carboxylesterase,CarE)和谷胱甘肽-S-转移酶(glutathione-S-transferase,GST)及乙酰胆碱酯酶(acetylcholinesterase,AChE)的活性。【结果】芫荽籽精油和芫荽叶精油对桃蚜成蚜的24 h触杀LC_(50)值分别为1.63和3.72μL/mL,24 h熏蒸LC_(50)值分别为14.69和34.15μL/mL。增效试验结果表明,添加体积分数0.05%芫荽籽精油和芫荽叶精油后,吡虫啉对桃蚜成蚜的LC_(50)值分别为0.99和1.51 mg/L,增效比分别为4.78和3.13。与空白对照组相比,LC_(50)浓度芫荽籽精油和芫荽叶精油触杀处理桃蚜成蚜48 h时,保护酶SOD和CAT活性均显著增强,但POD活性没有明显变化;解毒酶CarE和GST及AChE活性均显著增强,其中,芫荽籽精油处理组桃蚜成蚜SOD,GST和AChE活性分别是芫荽叶精油处理组的1.58,1.20和1.34倍。【结论】芫荽籽精油和芫荽叶精油对桃蚜均具有触杀和熏蒸活性,且均对吡虫啉表现出增效作用,其中芫荽籽精油效果更强;桃蚜可通过升高体内保护酶SOD,CAT活性和解毒酶CarE,GST及AChE活性来应对芫荽精油杀虫成分的胁迫。

关键词：桃蚜芫荽精油杀虫活性增效保护酶解毒酶

ARP沥青混合料在国省干道车辙处治中的应用研究

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价值工程 2024年第14期43卷 118-121页

作者：高天宇扬州大学建筑科学与工程学院扬州225000 扬州市江都区交通运输局扬州225200

本文依托某国省干道养护工程,对ARP外掺剂对沥青混合料性能影响进行了探究,并与常规的SBS改性沥青混合料进行对比。首先基于Sup25级配,对ARP沥青混合料和常规SBS沥青混合料进行了配合比设计,确定其级配和最佳油石比;然后对其常规路用性... 详细信息

本文依托某国省干道养护工程,对ARP外掺剂对沥青混合料性能影响进行了探究,并与常规的SBS改性沥青混合料进行对比。首先基于Sup25级配,对ARP沥青混合料和常规SBS沥青混合料进行了配合比设计,确定其级配和最佳油石比;然后对其常规路用性能(高温性能、低温性能、水稳定性)进行测试;最后铺筑了ARP沥青混合料试验路段,总结了其施工工艺。结果表明,ARP掺量为沥青混合料质量的0.45%;ARP沥青混合料的高温性能和水稳定性均优于改性沥青混合料Sup25,但前者的低温性能略低;ARP沥青混合料施工方便,各项施工指标均满足设计要求,且经过半年跟踪检测,实际路用性能较好;ARP沥青混合料Sup25的价格相较于SBS改性沥青混合料,每吨可节约400元,具有明显的经济性。研究成果可为ARP外掺剂的推广应用提供依据和基础。

关键词： ARP 高温性能低温性能水稳定性施工工艺

KIF18B promotes tumor progression in osteosarcoma by activating β-catenin

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Cancer Biology & Medicine 2020年第2期17卷 371-386页

作者： tian gao Ling Yu Zhiwei Fang Jiayong Liu Chujie Bai Shu Li Ruifeng Xue Lu Zhang Zhichao Tan Zhengfu Fan Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of Bone and Soft Tissue TumorPeking University Cancer Hospital&InstituteBeijing 100142China Department of Orthopedics Renmin Hospital of Wuhan UniversityWuhan 430060China

Objective:Osteosarcoma is a common primary highly malignant bone tumor.Kinesin family member 18B(K1F18B)has been identified as a potential oncogene involved in the development and metastasis of several cancer types.While KIF18B overexpression in osteosarcoma tissue is clearly detected,its specific function in the disease process remains to be established.Methods:K IF18B expression was assessed in osteosarcoma tissues and cells.We additionally evaluated the effects of KIF18B on proliferation,migration,and invasion of osteosarcoma cells,both in vitro and in vivo.Results:Our results showed overexpression of KIF18B in osteosarcoma tissues and cells.Knockdown of K IF18B induced G1/S phase arrest and significantly inhibited proliferation,migration,and invasion of osteosarcoma cells,both in vitro and in vivo.K IF18B regulated P-catenin expression at the transcriptional level by controlling nuclear aggregation of ATF2 and at the post-transcriptional level by interacting with the adenomatous polyposis coli(APC)tumor suppressor gene in osteosarcoma cells.Conclusions:KIF18B plays a carcinogenic role in osteosarcoma by regulating expression ofβ-catenin transcriptionally via decreasing nuclear aggregation of ATF2 or post-transcriptionally through interactions with APC.Our collective findings support the potential utility of KIF18B as a novel prognostic biomarker for osteosarcoma.

关键词： β-catenin APC ATF2 KIF18B osteosarcoma

基于透射信号的钢桥面板贯穿型裂纹超声检测方法研究

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沈阳建筑大学学报（自然科学版） 2024年第1期40卷 96-104页

作者：夏俊元吉伯海袁周致远高天河海大学土木与交通学院江苏南京210098

目的提出一种基于超声波透射信号的钢桥面板贯穿型裂纹检测方法,提高在役钢桥隐蔽裂纹检测精度和效率。方法采用数值分析方法研究了超声波在含裂纹面板中的传播机制,分析了不同裂纹参数与接收信号强度的变化规律,并通过顶板贯穿裂纹... 详细信息

目的提出一种基于超声波透射信号的钢桥面板贯穿型裂纹检测方法,提高在役钢桥隐蔽裂纹检测精度和效率。方法采用数值分析方法研究了超声波在含裂纹面板中的传播机制,分析了不同裂纹参数与接收信号强度的变化规律,并通过顶板贯穿裂纹检测试验,进一步验证该检测方法的可行性。结果裂纹检测参数建议激励晶片边长为4 mm、激励频率为5 MHz、K值为0.8;裂纹宽度小于0.1 mm时可忽略裂纹宽度对检出信号的影响,裂纹宽度大于0.1 mm时可将尖端反射信号作为判断依据;透射信号与裂纹深度呈负相关,恢复至最大值时的入射坐标与裂纹深度呈线性关系,作为裂纹深度的计算依据,检测误差在1 mm以内。结论基于穿透信号的超声波检测方法,以恢复至最大值时的入射坐标为主要指标,可以实现钢桥顶板贯穿裂纹的有效检测。

关键词：桥梁与隧道工程钢桥面板贯穿型裂纹穿透法超声波检测

Protein kinases regulate hyperactivated motility of human sperm

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Chinese Medical Journal 2021年第20期134卷 2412-2414页

作者： Ya-Yan Wang Pei-Bei Sun Kun Li tian gao Dong-Wang Zheng Fang-Ping Wu A-juan Liu Ya Ni Department of Reproductive Physiology Zhejiang Academy of Medical Sciences/Hangzhou Medical CollegeHangzhouZhejiang 310013China School of Pharmacy Zhejiang Academy of Medical Sciences/Hangzhou Medical CollegeHangzhouZhejiang 310013China Department of Gynecology and Obstetrics Lishui Municipal Central HospitalLishuiZhejiang 323000China

Once the sperm enters into the female reproductive tract,they undergo an important process called capacitation,which involves a series of physiological and biochemical changes that ensure fertilization.During capacitation,calcium ions(Ca^(2+))increase the bending amplitude of a sperm’s flagellum.This causes hyperactivation,which is manifested as the asymmetrical beating of the flagellum.Tyrosine phosphorylation is also a cause for human sperm hyperactivation;asthenospermia—that is,reduced sperm motility—occurs when the sperm are incapable of hyperactivation owing to impaired tyrosine phosphorylation.[1]Hyperactivated motility enables the sperm to migrate and penetrate the cumulus cells and zona pellucida surrounding the oocyte,leading to fertilization.Therefore,the hyperactivated motility of sperm is critical for male reproductive ability,and the molecular mechanism underlying human sperm hyperactivation requires discussion.

关键词： motility impaired migrate