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Silicone/graphene oxide co-cross-linked aerogels with wide-temperature mechanical flexibility,super-hydrophobicity and flame resistance for exceptional thermal insulation and oil/water separation

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Journal of Materials Science & Technology 2022年第19期114卷 131-142页

作者： Zhao-Hui Zhang Zuan-Yu Chen Yi-Hao Tang Yu-Tong Li Dequan Ma Guo-Dong Zhang Rabah Boukherroub Cheng-fei cao Li-Xiu Gong Pingan Song Kun cao Long-Cheng Tang College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material Technology of MoEHangzhou Normal UniversityHangzhou311121China China Helicopter Research and Development Institute Jingdezhen333001China Tianjin Helicopter Co. Ltd.Tianjin300308China Univ.Lille CNRSCentrale LilleUniv.Polytechnique Hauts-de-FranceUMR 8520-IEMNF-59000 LilleFrance Centre for Future Materials University of Southern QueenslandSpringfield CampusQLD4300Australia State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027China

Development of multifunctional and high-performance silicone aerogel is highly required for various promising ***,unstable cross-linking structure and poor thermal stability of silicone network as well as complicated processing restrict the practical use ***,we report a facile and versatile ambient drying strategy to fabricate lightweight,wide-temperature flexible,super-hydrophobic and flame retardant silicone composite aerogels modified with low-content functionalized graphene oxide(FGO).After optimizing silane molecules,incorporation ofγ-aminopropyltriethoxysilane functionalization is found to promote the dispersion stability of GO during the hydrolysis-polymerization process and thus produce the formation of unique strip-like co-cross-linked ***,the aerogels containing∼2.0 wt%FGO not only possess good cyclic compressive stability under strain of 70%for 100 cycles and outstanding mechanical reliability in wide temperature range(from liquid nitrogen to 350℃),but also display excellent flame resistance and ***,the optimized silicone/FGO aerogels display exceptional thermal insulating performance superior to pure aerogel and hydrocarbon polymer foams,and they also show efficient oil absorption and separation capacity for var-ious solvents and oil from ***,this work provides a new route for the rational design and development of advanced silicone composite aerogels for multifunctional applications.

关键词： Silicone composite aerogel Functionalized graphene oxide Mechanical robustness Flame resistance Super-hydrophobicity

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Setosphlides A-D, New Isocoumarin Derivatives from the Entomogenous Fungus Setosphaeria rostrate LGWB-10

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Natural Products and Bioprospecting 2021年第1期11卷 137-142页

作者： Wenbin Gao Xiaoxia Wang Fengli Chen Chunqing Li fei cao Duqiang Luo College of Life Science Institute of Life Science and Green DevelopmentKey Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of EducationHebei UniversityBaoding 071002China

Investigation of the entomogenous fungus Setosphaeria rostrate LGWB-10 from Harmonia axyridis led to the isolation of four new isocoumarin derivatives,setosphlides A-D(1-4),and four known analogues(5-8).Their planar structures and the relative configurations were elucidated by comprehensive spectroscopic *** absolute configurations of isocoumarin nucleus for 1-4 were elucidated by their ECD *** C-10 relative configurations for the pair of C-10 epimers(1 and 2)were established by comparing the magnitude of the computed 13C NMR chemical shifts(Δδcalcd.)with the experimental 13C NMR values(Δδexp.)for the *** of the isolated compounds(1-8)were evaluated for their cytotoxicities against four human tumor cell lines MCF-7,MGC-803,HeLa,and Huh-7.

关键词： Entomogenous fungus Setosphaeria rostrate Isocoumarin Absolute configuration

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Zircon U-Pb ages in the Nuratau ophiolitic mélange in the southern Tianshan,Uzbekistan:Implication for the closure of Paleo-Asian Ocean

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China Geology 2024年第2期7卷 365-368,I0004-I0007页

作者： Kai Weng Ji-fei cao Divayev-Farid Karibovich Jahongir-Jurabekovich Movlanov Bo Chen Zhong-ping Ma Xi’an Center of Geological Survey China Geological SurveyXi’an 710119China The Center for Geoinnovation Technologies Doctor of Sciences in Geology and Mineralogy University of Geological ScienceTashkent 100060Uzbekistan

*** The Central Asian Orogenic Belt(caoB),which is located between the European craton,Siberian craton,and Tarim-North China craton(Fig.1a),is the largest phanerozoic accretionary orogen in the *** resulted from the longterm subduction and accretion of the Paleo-Asian Ocean(PAO).The PAO has been in existence since at least the late Mesoproterozoic(about 1020 Ma).However,there has been debate about the closing time of the PAO.

关键词： Asian Paleo Tianshan

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Novel layout design of 4H-SiC merged PiN Schottky diodes leading to improved surge robustness

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Chinese Physics B 2023年第9期32卷 552-558页

作者：陈嘉豪王颖费新星包梦恬曹菲 College of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China The Yangzhou Marine Electronic Instrument Institute Yangzhou 225001China

A method to improve the surge current capability of silicon carbide(SiC)merged PiN Schottky(MPS)diodes is presented and investigated via three-dimensional electro-thermal *** compared with a conventional MPS diode,the proposed structure has a more uniform current distribution during bipolar conduction due to the help of the continuous P+surface,which can avoid the formation of local hotspots during the surge *** Silvaco simulation results show that the proposed structure has a 20.29%higher surge capability and a 15.06%higher surge energy compared with a conventional MPS *** bipolar on-state voltage of the proposed structure is 4.69 V,which is 56.29%lower than that of a conventional MPS diode,enabling the device to enter the bipolar mode earlier during the surge ***,the proposed structure can suppress the occurrence of‘snapback'phenomena when switching from the unipolar to the bipolar operation *** addition,an analysis of the surge process of MPS diodes is carried out in detail.

关键词： merged PiN Schottky(MPS)diode silicon carbide(SiC) surge capability surge energy reliability

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基于线性约束最小方差的稳健波束形成算法

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北京航空航天大学学报 2023年第3期49卷 617-624页

作者：吕岩曹菲火箭军工程大学核工程学院西安710025 中国人民解放军96746部队库尔勒841000

针对平面阵列天线波束形成过程中的波达方向(DOA)估计失配问题,提出在期望信号(SOI)方向附近增加线性约束的算法,有效提升了平面阵列波束形成的稳健性;此外,针对增加线性约束会导致波束形成算法自由度降低的问题,以均匀线阵为例,提出在... 详细信息

针对平面阵列天线波束形成过程中的波达方向(DOA)估计失配问题,提出在期望信号(SOI)方向附近增加线性约束的算法,有效提升了平面阵列波束形成的稳健性;此外,针对增加线性约束会导致波束形成算法自由度降低的问题,以均匀线阵为例,提出在广义旁瓣相消(GSC)算法模型中添加阻塞矩阵预选环节的算法,有效解决了添加线性约束所致的自由度损失问题,从而使算法在提升稳健性的同时保持了原有的自由度。最后,通过计算机仿真实验验证了所提算法的有效性。

关键词：稳健波束形成波达方向估计失配线性约束最小方差广义旁瓣相消阻塞矩阵

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一种单旋翼复合式直升机性能特性

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北京航空航天大学学报 2016年第4期42卷 772-779页

作者：曹飞陈铭北京航空航天大学航空科学与工程学院北京100083

为研究复合式直升机性能变化特性,构建了复合式直升机各气动部件数学模型组成的性能计算模型。以该计算模型为基础,通过不同的飞行条件约束,建立了复合式直升机的过渡飞行边界,研究了复合式直升机在边界内通过不同飞行路线从悬停模式到... 详细信息

为研究复合式直升机性能变化特性,构建了复合式直升机各气动部件数学模型组成的性能计算模型。以该计算模型为基础,通过不同的飞行条件约束,建立了复合式直升机的过渡飞行边界,研究了复合式直升机在边界内通过不同飞行路线从悬停模式到高速模式的飞行功率变化特点,分析了旋翼转速、前飞速度以及旋翼和机翼升力分配关系等参数对高速性能的影响。研究结果表明,复合式直升机从悬停模式过渡到高速模式通过旋翼卸载给机翼可降低飞行功率,且通过减小旋翼转速卸载比来减小旋翼总距卸载更为有效。但在过渡到高速模式时复合式直升机的旋翼转速也不能过低,过低的旋翼转速可能会增加飞行需用功率,同时也会对模型的配平产生影响,并且造成配平计算过程的迭代不收敛。

关键词：复合式直升机数学模型过渡边界功率卸载

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Analysis of Local Features and Shaping of Rural Tourism in Kuandian of Liaoning Province

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Asian Agricultural Research 2017年第9期9卷 9-10,15页

作者： fei cao Liang ZHAO School of Business Administration University of Science and Technology Liaoning

In the process of rural tourism development and planning,local features and related concepts have attracted more and more attention from scholars with the deepening of development. As one form of places,rural areas have extraordinary significance,so the participation of local residents,the integration of traditional culture and the inheritance of local features should be fully taken into account in the development of rural tourism. However,some local governments refuse to focus on local features in the process of rural tourism planning,so the planning and development of rural tourism in many places are similar and can't reflect the unique features of local culture. Therefore,this paper takes Kuandian Manchu Autonomous County in Liaoning Province as an example,which has rich rural tourism resources and unique features,and conducts research on the tourism planning with local features from local perspective.

关键词： Rural tourism Local construction Liaoning Province Small towns Rural tourism planning

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中国省域城镇化与用水结构的空间库兹涅茨曲线拟合与研判

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干旱区资源与环境 2017年第3期31卷 8-13页

作者：曹飞西安电子科技大学马克思主义学院西安710071

为研究中国城镇化与用水结构的动态关系,选用2004~2013年中国省域空间面板数据,研究了中国城镇化与用水结构之间库兹涅茨曲线的存在性。研究结果表明:农业用水比重及用水强度呈现倒N型曲线,且大多数省区处在下降前的爬坡阶段;工业用水... 详细信息

为研究中国城镇化与用水结构的动态关系,选用2004~2013年中国省域空间面板数据,研究了中国城镇化与用水结构之间库兹涅茨曲线的存在性。研究结果表明:农业用水比重及用水强度呈现倒N型曲线,且大多数省区处在下降前的爬坡阶段;工业用水比重与生活用水比重属于N型曲线,且大多数省区处在上升前的下坡阶段。总体来看,工业化与城镇化带来的工业用水比重及生活用水比重上升所带来的压力,要大于农业用水比重下降而带来的用水缓解。应对城镇化背景下的用水问题,需要调整产业结构、推动技术创新、经营方式创新,同时需要制定协同联动的区域用水、治水机制。

关键词：城镇化用水结构空间面板库兹涅茨曲线

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Three New Flavone Glycosides from Drymaria diandra B1.

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Journal of Integrative Plant Biology 2005年第9期47卷 1140-1144页

作者： Zhong-Tao DING Xue-Qiong YANG Qiu-E cao fei LI Department of Chemistry Center for Advanced Studies of Medicinal and Organic Chemistry Yunnan University Kunming 650091 China

In order to find new structural and biologically active compounds, the constituents from the whole plant of Drymaria diandra B1. （Caryophyllaceae） were investigated and three new flavone glycosides, named drymariatins B （1）, C （2）, and D （3）, were isolated by solvent partition, Si gel, sephadex LH-20, and Rp- 18 column chromatography. Using spectroscopic methods, including two-dimensional nuclear magnetic resonance analysis, the structures of these compounds were elucidated as 6-C-（2-deoxy-β-D-fucopyranosyl）- 5,7,4＇-trihydroxyl-flavone, 6-C-（2-deoxy-β-D-fucopyranosyl）-7-O-（β-D-glucopyranosyl）-5,4＇-dibydroxyl- flavone, and 6-C-（3-keto-β-digitoxopyranosyl）-7-O-（β-D-glucopyranosyl）-5,4＇-dihydroxyl-flavone.

关键词： Caryophyllaceae Drymaria diandra drymariatins flavone glycoside.

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Neuroprotective effect of Cerebralcare Granule after cerebral ischemia/reperfusion injury

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Neural Regeneration Research 2016年第4期11卷 623-629页

作者： Xiao-xiao Zhang Fen-fen He Gui-lin Yan Ha-ni Li Dan Li Yan-ling Ma Fang Wang Nan Xu fei cao Department of Neurology Union HospitalTongji Medical CollegeHuazhong University of Science and Technology Department of Neurology Liyuan HospitalTongji Medical CollegeHuazhong University of Science and Technology

Cerebralcare Granule（CG） improves cerebral microcirculation and relieves vasospasm,but studies investigating its therapeutic effect on cerebral ischemia/reperfusion injury are *** the present study,we administered CG（0.3,0.1 and 0.03 g/m L intragastrically） to rats for 7 consecutive *** then performed transient occlusion of the middle cerebral artery,followed by reperfusion,and administered CG daily for a further 3 or 7 *** with no treatment,high-dose CG markedly improved neurological function assessed using the Bederson and Garcia *** 3 days,animals in the high-dose CG group had smaller infarct volumes,greater interleukin-10 expression,and fewer interleukin-1β-immunoreactive cells than those in the untreated model ***,at 7 days,high-dose CG-treated rats had more vascular endothelial growth factor-immunoreactive cells,elevated angiopoietin-1 and vascular endothelial growth factor expression,and improved blood coagulation and flow indices compared with untreated model *** results suggest that CG exerts specific neuroprotective effects against cerebral ischemia/reperfusion injury.

关键词： nerve regeneration Cerebralcare Granule cerebral ischemia/reperfusion angiogenesis inflammatory response blood coagulation hemorheology neural regeneration

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