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Interaction of Rare Earth Ions in Sr2MgSi2O7：Eu^2＋,Dy^3＋ Material

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Journal of Wuhan University of Technology(Materials Science) 2016年第2期31卷 269-273页

作者：海鸥姜洪义 xu dong wang yahui zheng wei luo ting School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China

To discuss the function of Eu and Dy and their interaction in Sr2 Mg Si2O7：Eu^2＋,Dy^3＋ long afterglow material,the Eu and Dy single doped and their co-doped Sr2 Mg Si2O7：Eu^2＋,Dy^3＋ were *** samples were characterized by X-ray diffraction（XRD）,decay curves,photoluminescence（PL）,and thermoluminescence（TL）.The results indicate that Sr2 Mg Si2O7：Eu has afterglow properties,and the doping of Eu ion in Sr2 Mg Si2O7：Eu^2＋,Dy^3＋ can lower the depth of *** ion can not only serve as luminescence center,but also produce traps in the matrix,meanwhile,it also exerts certain influences on the traps produced by Dy in Sr2 Mg Si2O7：Eu^2＋,Dy^3＋.The Dy ion can not act as luminescence center but relates to the change of the traps in the Sr2 Mg Si2O7 matrix.

关键词： phosphors afterglow properties luminescence traps Sr2MgSi2O7:Eu^2+ Dy^3+

Identification methods of coal-bearing source rocks for Yacheng Formation in the western deepwater area of South China Sea

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Acta Oceanologica Sinica 2015年第4期34卷 19-31页

作者： REN Jinfeng ZHANG Yingzhao wang Hua wang yahui GAN Huajun HE Weijun SUN Ming SONG Guangzeng Key Laboratory of Tectonics and Petroleum Resources (China University of Geosciences) Ministry of Education Faculty of Earth Resources China University of Geosciences Zhanjiang Branch of China National Offshore Oil Corporation (CNOOC) Limited Guangzhou Marine Geological Survey

Owing to the fact that the coal-beds are with the characteristics of multi-beds, thin single-bed, rapid lateral changes and deep burial, coal-bearing source rocks are difficult to be identified and predicted, especially in the lower exploration deepwater area. In this paper, a new integrative process utilizing geology and geophysics is proposed for better predicting the distribution of coal-bearing source rocks. Coal-beds were identified by the logging responses of“three higher, three lower, and one expand”and carbargilite were recognized by the characteristics of“four higher and one lower”. Based on the above logical decision, coal-beds and carbargilite can be distinguished automatically by cluster analysis of logging curves in verticality. Within the constraints of well-seismic calibration, the coal-beds group also can be detected in horizontality by the integrated representation of“negative phase, higher Q, lower impedance and lower frequency”within the seismic data. However, the distribution of coal-bearing source rocks utilizing geophysical methodology may do not conform to the geological rules of coal accumulation. And then the main geological controlling factors of coal accumulation are comprehensively analyzed as follows：（1） Paleotopography and tectonic subsidence determine the planar range of terrestrial-marine transitional facies markedly;（2） The relative sea level changes affect the accommodation space and shoreline migration, and limit the vertical range of coal-beds. More specifically, the relationship between the accommodation creation rate and the peat accumulation rate is a fundamental control on coal accumulation. The thickest and most widespread coals form where those two factors reached a state of balance;（3） The supply of autochthonous clasts and the distance between deposition places and paleovegetation accumulated area are the critical factor to form abundant coal, which means that if deposition area is close to paleouplift, there would be suff

关键词： Qiongdongnan Basin deepwater area coal-bearing source rocks geological and geophysical methods

Reduced graphene oxide aerogel decorated with Mo_(2)C nanoparticles toward multifunctional properties of hydrophobicity,thermal insulation and microwave absorption

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International Journal of Minerals,Metallurgy and Materials 2023年第3期30卷 536-547页

作者： yahui wang Minghui Zhang Xuesong Deng Zhigang Li Zongsheng Chen Jiaming Shi Xijiang Han Yunchen Du Key Laboratory of Infrared and Low Temperature Plasma of Anhui Province National University of Defense TechnologyHefei 230037China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China State Key Laboratory of Pulsed Power Laser Technology National University of Defense TechnologyHefei 230037China Anhui Provincial Laboratory of Advanced Laser Technology National University of Defense TechnologyHefei 230037China

Reduced graphene oxide(rGO)aerogels are emerging as very attractive scaffolds for high-performance electromagnetic wave absorption materials(EWAMs)due to their intrinsic conductive networks and intricate interior microstructure,as well as good compatibility with other electromagnetic(EM)***,we realized the decoration of rGO aerogel with Mo_(2)C nanoparticles by sequential hydrothermal assembly,freeze-drying,and high-temperature *** show that Mo_(2)C nanoparticle loading can be easily controlled by the ammonium molybdate to glucose molar *** hydrophobicity and thermal insulation of the rGO aerogel are effectively improved upon the introduction of Mo_(2)C nanoparticles,and more importantly,these nanoparticles regulate the EM properties of the rGO aerogel to a large *** more Mo_(2)C nanoparticles may decrease the overall attenuation ability of the rGO aerogel,they bring much better impedance *** a molar ratio of 1:1,a desirable balance between attenuation ability and impedance matching is *** this context,the Mo_(2)C/r GO aerogel displays strong reflection loss and broad response bandwidth,even with a small applied thickness(1.7 mm)and low filler loading(9.0wt%).The positive effects of Mo_(2)C nanoparticles on multifunctional properties may render Mo_(2)C/r GO aerogels promising candidates for high-performance EWAMs under harsh conditions.

关键词： Mo_(2)C/reduced graphene oxide aerogel microwave absorption dielectric loss hydrophobicity thermal insulation

Solvent-Free Synthesis of Ultrafine Tungsten Carbide Nanoparticles-Decorated Carbon Nanosheets for Microwave Absorption

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Nano-Micro Letters 2020年第11期12卷 141-153页

作者： Yunlong Lian Binhua Han Dawei Liu yahui wang Honghong Zhao Ping Xu Xijiang Han Yunchen Du MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China

Carbides/carbon composites are emerging as a new kind of binary dielectric systems with good microwave absorption ***,we obtain a series of tungsten carbide/carbon composites through a simple solvent-free strategy,where the solid mixture of dicyandiamide(DCA)and ammonium metatungstate(AM)is employed as the *** cubic WC1-x nanoparticles(3-4 nm)are in situ generated and uniformly dispersed on carbon *** configuration overcomes some disadvantages of conventional carbides/carbon composites and is greatly helpful for electromagnetic *** is found that the weight ratio of DCA to AM can regulate chemical composition of these composites,while less impact on the average size of WC1-x *** the increase in carbon nanosheets,the relative complex permittivity and dielectric loss ability are constantly enhanced through conductive loss and polarization *** different dielectric properties endow these composites with distinguishable attenuation ability and impedance *** DCA/AM weight ratio is 6.0,the optimized composite can produce good microwave absorption performance,whose strongest reflection loss intensity reaches up to-55.6 dB at 17.5 GHz and qualified absorption bandwidth covers 3.6-18.0 GHz by manipulating the thickness from 1.0 to 5.0 *** a performance is superior to many conventional carbides/carbon composites.

关键词： Solvent-free synthesis Tungsten carbide/carbon composite Ultrafine nanoparticle Microwave absorption Dielectric loss

Targeting fatty acid synthase sensitizes human nasopharyngeal carcinoma cells to radiationvia downregulating frizzled class receptor 10

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Cancer Biology & Medicine 2020年第3期17卷 740-752页

作者： Jiongyu Chen Fan Zhang Xiaosha Ren yahui wang Wenhe Huang Jianting Zhang Yukun Cui Guangdong Provincial Key Laboratory for Breast Cancer Diagnosis and Treatment Cancer Hospital of Shantou University Medical CollegeShantou 515041China Department of Cancer Biology University of Toledo College of Medicine and Life SciencesToledoOH 43614USA

Objective:Our aim was to test the hypothesis that fatty acid synthase(FASN)expression contributes to radioresistance of nasopharyngeal carcinoma(NPC)cells and that inhibiting FASN enhances ***:Targeting FASN using epigallocatechin gallate(EGCG)or RNA interference in NPC cell lines that overexpress endogenous FASN was performed to determine their effects on cellular response to radiationin vitro using MTT and colony formation assays,andin vivo using xenograft animal *** blot,immunohistochemistry,real-time PCR arrays,and real-time RT-PCR were used to determine the relationship between FASN and frizzled class receptor 10(FZD10)***10 knockdown and overexpression were used to determine its role in mediating FASN function in cellular response to *** staining was used to determine FASN and FZD10 expressions in human NPC tissues,followed by analysis of their association with the overall survival of ***:FASN knockdown or inhibition significantly enhanced radiosensitivity of NPC cells,bothin vitro andin *** was a positive association between FASN and FZD10 expression in NPC cell lines grown as monolayers or xenografts,as well as human *** knockdown reduced FZD10 expression,and rescue of FZD10 expression abolished FASN knockdown-induced enhancement of *** and FZD10 were both negatively associated with overall survival of NPC ***:FASN contributes to radioresistance,possiblyvia FZD10 in NPC *** FZD10 and FASN expressions were associated with poor outcomes of NPC *** may sensitize radioresistance by inhibiting FASN and may possibly be developed as a radiosensitizer for better treatment of NPCs.

关键词： Epigallocatechin gallate fatty acid synthase frizzled class receptor 10 nasopharyngeal carcinoma radioresistance

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空调控温对玉米储藏品质的影响

现代食品 2024年第3期30卷 7-9页

作者：张齐许光辉赵均超王亚辉中央储备粮新蔡直属库有限公司平舆分公司河南驻马店463500

玉米是我国主要农作物,产量高,存储量大,玉米颗粒胚部大,呼吸作用强,不易储存。为了保证粮食储存安全,空调控温技术在我国各地区得到了广泛应用。本试验在玉米度夏期间,采用空调控温技术对玉米进行储藏,对仓温均匀性、不同类型房式仓的... 详细信息

玉米是我国主要农作物,产量高,存储量大,玉米颗粒胚部大,呼吸作用强,不易储存。为了保证粮食储存安全,空调控温技术在我国各地区得到了广泛应用。本试验在玉米度夏期间,采用空调控温技术对玉米进行储藏,对仓温均匀性、不同类型房式仓的控温效果、玉米水分变化及品质变化等进行了研究。结果表明,空调控温能够有效地控制仓温的变化,粮堆水分较为均匀,储藏期间玉米脂肪酸值变化缓慢,能确保玉米度夏期间的准低温储藏。

关键词：房式仓仓温水分脂肪酸值玉米

高寒地区平板热管式太阳能集热系统热性能研究

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内蒙古工业大学学报（自然科学版） 2024年第1期43卷 56-62页

作者：刘霜刘耀邱云峰王亚辉郭枭内蒙古工业大学能源与动力工程学院呼和浩特010051 北方联合电力有限责任公司和林发电厂呼和浩特011508

基于呼和浩特地区高寒气候条件,搭建两组完全一致的平板热管式太阳能集热系统,通过实验对比分析太阳辐射强度、传热工质流量、集热板表面积尘等因素对集热器瞬时集热效率以及系统热性能的影响。结果表明,在同等外界条件下,集热器的集热... 详细信息

基于呼和浩特地区高寒气候条件,搭建两组完全一致的平板热管式太阳能集热系统,通过实验对比分析太阳辐射强度、传热工质流量、集热板表面积尘等因素对集热器瞬时集热效率以及系统热性能的影响。结果表明,在同等外界条件下,集热器的集热效率随着工质流量的增加而增大,集热效率与太阳辐射强度变化趋势相近,随积尘密度的增加,集热板表面积尘导致系统的得热量减少,集热性能下降。

关键词：平板热管式太阳能集热系统太阳辐射强度工质流量积尘集热效率

应用响应面法优化超薄高密度纤维板饰面胶合板的热压工艺参数

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东北林业大学学报 2024年第10期52卷 137-141页

作者：何明明邵雪靖王雅慧李长贵马玉珍董爱新山东省林业科学研究院济南250014 山东农业大学山东省林业科学研究院

为提高超薄高密度纤维板饰面胶合板的性能,利用响应面法(Box-Behnken)优化其热压工艺参数。以杨木单板(替代胶合板)、超薄高密度纤维板为试验材料,以热压温度(120、130、140、150、160℃)、热压时间(50、100、150、200、250 s)、热压压... 详细信息

为提高超薄高密度纤维板饰面胶合板的性能,利用响应面法(Box-Behnken)优化其热压工艺参数。以杨木单板(替代胶合板)、超薄高密度纤维板为试验材料,以热压温度(120、130、140、150、160℃)、热压时间(50、100、150、200、250 s)、热压压力(0.4、0.6、0.8、1.0、1.2 MPa)为影响因素,以超薄高密度纤维板饰面表面胶合强度、浸渍剥离长度为评价指标,采用单因素试验分析热压工艺(热压温度、热压时间、热压压力)对超薄高密度纤维板饰面的表面胶合强度和浸渍剥离长度的影响;采用响应面法设计多因素正交旋转组合试验,对试验设计范围内的影响因素进行优化热压参数组合、确定最优工艺参数。结果表明:热压温度对表面胶合强度的影响极显著,热压温度和热压压力对浸渍剥离长度影响极显著,热压时间和热压压力对浸渍剥离长度有显著的协同作用,共同影响板材的性能;试验范围内的最优工艺参数:热压温度150℃、热压时间210 s、热压压力0.8 MPa,板材的表面胶合强度为1.49 MPa、浸渍剥离长度为15 mm。

关键词：杨木单板胶合板饰面胶合板超薄高密度纤维板热压工艺参数

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Based on Agent Technology of Gas Pipeline Leakage Urgent Repairing Simulation Exercises and Practical Countermeasure Analysis

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Based on Agent Technology of Gas Pipeline Leakage Urgent Rep...