检索结果-南通市图书馆

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

1STC1在乳腺癌中的作用研究进展

河北医药 2024年第2期46卷 284-288页

作者：戴泽华侯净倪青贵州医科大学研究生院贵阳市550004 贵州省人民医院乳腺外科

乳腺癌是目前全球女性恶性肿瘤发病率最高的一种疾病,是一种高度异质性疾病,可根据其不同分子指标表达分为4种分子亚型,具有不同的组织学、临床行为和预后特征。锡钙素-1(STC1)是一种分泌型糖蛋白激素,目前已被证实可调节钙和磷酸盐的稳... 详细信息

乳腺癌是目前全球女性恶性肿瘤发病率最高的一种疾病,是一种高度异质性疾病,可根据其不同分子指标表达分为4种分子亚型,具有不同的组织学、临床行为和预后特征。锡钙素-1(STC1)是一种分泌型糖蛋白激素,目前已被证实可调节钙和磷酸盐的稳态,STC1在哺乳动物的各种组织中表达,并参与多种生理和病理生理过程。同时越来越多的证据表明STC1在多种不同类型的肿瘤中起致癌作用。为了进一步理清STC1与乳腺癌之间的关系,通过大量文献阅读及总结,总结分析了STC1与乳腺癌现有的研究数据,探索STC1与乳腺癌发生、发展、治疗预后等一系列的相关证据,并讨论其在乳腺癌各亚型中的潜在作用,为今后的研究找寻方向。

关键词：乳腺癌锡钙素-1 乳腺癌化疗耐药乳腺癌预后

维普期刊数据库博看期刊

铕掺杂改善锂离子电池正极材料LiFePO_(4)电化学性能研究

在线全文

学校读者我要写书评

暂无评论

无机盐工业 2024年第8期56卷 67-73页

作者：薛山刘璐戴建升李晴冯泽李意能曲靖市德方纳米科技有限公司云南曲靖655000 深圳市德方纳米科技股份有限公司广东深圳518000

橄榄石结构的LiFePO_(4)正极材料因其多重优势被广泛应用于新能源汽车和储能领域,但其较差的电导率和缓慢的锂离子扩散速率限制了其低温和倍率等性能。元素掺杂被认为是一种改善正极材料倍率、低温等性能的有效策略。采用固相法合成了... 详细信息

橄榄石结构的LiFePO_(4)正极材料因其多重优势被广泛应用于新能源汽车和储能领域,但其较差的电导率和缓慢的锂离子扩散速率限制了其低温和倍率等性能。元素掺杂被认为是一种改善正极材料倍率、低温等性能的有效策略。采用固相法合成了稀土金属铕掺杂的Li Fe_(1-x)Eu_(x)PO_(4)/C正极材料,并研究了铕掺杂量对Li Fe PO_(4)形貌、结构和电化学性能的影响。结果表明,铕掺杂能够改善Li Fe PO_(4)/C的电化学性能,其中Li Fe_(0.97)Eu_(0.03)PO_(4)/C表现出最佳的倍率、低温和循环性能,其组成的纽扣电池在20C高倍率下放电比容量为95.1 m A·h/g(较Li Fe PO_(4)/C提升57.7%),在低温(-20℃、0.1C)下的放电比容量为81.5 m A·h/g(较Li Fe PO_(4)/C提升73.8%),1C下经200次循环后其容量保持率为96.43%(较Li Fe PO_(4)/C高出2.46%)。X射线衍射分析和扫描电镜分析结果表明,铕的掺入能增大Li Fe PO_(4)的晶胞体积,降低Li和O原子之间的结合能,从而提高锂离子的扩散速率。电化学交流阻抗测试结果表明,Li Fe_(0.97)Eu_(0.03)PO_(4)/C表现出最低的电荷转移电阻和最高的锂离子扩散系数,其锂离子扩散系数比未掺杂的Li Fe PO_(4)/C高出2个数量级,这解释了其出色的倍率、低温和循环性能。

关键词： LiFePO_(4) 锂离子电池铕掺杂倍率性能循环性能

Microstructure and properties of nano-laminated Y_(3)Si_(2)C_(2) ceramics fabricated via in situ reaction by spark plasma sintering

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2021年第3期10卷 578-586页

作者： Lin-Kun SHI Xiaobing ZHOU Jian-qing dai Ke CHEN Zhengren HUANG qing HUANG Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China

A nano-laminated Y_(3)Si_(2)C_(2) ceramic material was successfully synthesized via an in situ reaction between YH_(2)and SiC using spark plasma sintering technology.A MAX phase-like ternary layered structure of Y_(3)Si_(2)C_(2) was observed at the atomic-scale by high resolution transmission electron *** lattice parameters calculated from both X-ray diffraction and selected area electron diffraction patterns are in good agreement with the reported theoretical *** nano-laminated fracture of kink boundaries,delamination,and slipping were observed at the tip of the Vickers *** elastic modulus and Vickers hardness of Y_(3)Si_(2)C_(2) ceramics(with 5.5 wt%Y_(2)O_(3)) sintered at 1500℃were 156 and 6.4 GPa,*** corresponding values of thermal and electrical conductivity were 13.7 W·m^(-1)·K^(-1) and 6.3×10^(5)S·m^(-1),respectively.

关键词： Y3Si_(2)C_(2) rare earth silicide carbides spark plasma sintering(SPS) ternary layered structure ceramic properties

在线全文

学校读者我要写书评

暂无评论

系统功能语言学意义观的马克思主义取向

山西大同大学学报（社会科学版） 2024年第2期38卷 95-100页

作者：黄劲怡代雨晴云南师范大学外国语学院云南昆明650500

系统功能语言学的意义观与马克思主义有三方面趋同:在“作为社会实践的意义”方面,意义受社会语境的支配,同时重构和创造新的社会现实;就“意义与意识的一元论”而言,意义的生成和使用离不开主体意识的参与;从“意义与意识形态的互构”... 详细信息

系统功能语言学的意义观与马克思主义有三方面趋同:在“作为社会实践的意义”方面,意义受社会语境的支配,同时重构和创造新的社会现实;就“意义与意识的一元论”而言,意义的生成和使用离不开主体意识的参与;从“意义与意识形态的互构”角度看,意义受控于主流意识形态,又反作用于意识形态。上述辩证关系同时存在于马克思主义的基本思想和系统功能语言学的意义观中,显示了系统功能语言学意义观的马克思主义取向。

关键词：系统功能语言学意义马克思主义取向

In situ synthesis and hardness of TiC/Ti_5Si_3 composites on Ti-5Al-2.5Sn substrates by gas tungsten arc welding

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2013年第3期20卷 284-289页

作者： Wen-qing Yan Le dai Chi-bin Gui School of Mechanical and Automotive Engineering South China University of Technology School of Materials and Metallurgy Wuhan University of Science and Technology Military Representative Office of Navy 407 Factory College of Materials Science and Engineering Huazhong University of Science and Technology

TiC/TisSi3 composites were fabricated on Ti-5A1-2.5Sn substrates by gas tungsten arc welding （GTAW）. Identification of the phases was performed using X-ray diffraction （XRD）. The microstructures were analyzed using scanning electron microscopy （SEM） combined with energy-dispersive X-ray spectrometry （EDS） and optical microscopy （OM）. The Vickers hardness was measured with a micro-hardness tester. The TiC/TisSi3 composites were obtained in a double-layer track, and the Vickers hardness of the track increased by two to three times compared with the Ti-5A1-2.5Sn substrate.

关键词： titanium alloys surface modification gas tungsten arc welding (GTAW) microstructure hardness

在线全文

学校读者我要写书评

暂无评论

碳毡厌氧折流板反应器处理农村黑水

中国环境科学 2024年第4期44卷 2054-2062页

作者：温仓祥戴喆秦查晓程方奎程鹤来蔡青秀吕锡武东南大学能源与环境学院江苏南京210096 东南大学无锡太湖水环境工程研究中心江苏无锡214135 江苏科技大学环境与化学工程学院江苏镇江212018 苏州科技大学环境科学与工程学院江苏苏州215009

评估了碳毡厌氧折流板反应器在室温下处理黑水(源分离的厕所污水)的能力,通过逐步缩短水力停留时间(HRT)以探索其最大性能.结果表明,在HRT为1.45d,有机负荷率为2.94kg COD/(m^(3)·d)的条件下实现了最大容积产气率(417±59)NL CH4/(m^(3... 详细信息

评估了碳毡厌氧折流板反应器在室温下处理黑水(源分离的厕所污水)的能力,通过逐步缩短水力停留时间(HRT)以探索其最大性能.结果表明,在HRT为1.45d,有机负荷率为2.94kg COD/(m^(3)·d)的条件下实现了最大容积产气率(417±59)NL CH4/(m^(3)·d),此时甲烷化率(40.5±5.02)%,总COD去除率(79.08±7.24)%.碳毡的加入富集了Methanospirillum属,通过氢营养型产甲烷途径实现高效厌氧消化性能.该反应器在室温下表现出优良的有机物处理效果,高甲烷产量与沼气纯度,尾水中富含可植物直接利用的氮磷营养盐,系统简单易维护,具有在农村地区实际应用的潜力.

关键词：产甲烷导电材料农村生活污水厌氧消化资源回收

CHARACTERISTICS OF CORRELATION AND SPECTRUM BETWEEN WALL FLUCTUATING PRESSURE AND FLUCTUATING VELOCITY OF IMPINGING JET

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2002年第3期14卷 21-28页

作者： dai, Guang-qing Yang, Yong-Quan Yang, qing Wang, Hai-Yun Hydraulics Lab. of High Speed Flows Sichuan Univ. Chengdu 610065 China

The correlation, between wall fluctuating pressure and fluctuating velocity, on the bed of plunging pool under the action of single and twin impinging jet, and their spectrum and turbulent scale are investigated in the paper by using 2-D LDA and the dynamic pressure scanning system of multiple points. It is found that the cross correlation between the horizontal fluctuating velocity and the fluctuating pressure of twin jet is bigger than that of single jet, and the spectrums of horizontal fluctuating velocity and fluctuating pressure obviously have approximately same dominant frequency. The relationship between the fluctuation pressure coefficient on wall and the turbulent intensity near the wall can be described with logarithmic curve.

关键词： Hydraulic structures Pressure Pressure measurement Turbulence Velocity

DETACHED EDDY SIMULATION OF HYDRAULIC CHARACTERISTICS ALONG THE SIDE-WALL AFTER A NEW ARRANGEMENT-SCHEME OF THE SUDDEN LATERAL ENLARGEMENT AND THE VERTICAL DROP

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2011年第5期23卷 669-675页

作者： LI Guo-jing dai Guang-qing YANG qing MA Xu-dong State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University Chengdu 610065 China

In order to study the cavitation damage in a side-wall when a sudden lateral enlargement and a vertical drop are imposed at the radial gate, a new arrangement-scheme is proposed, where the sudden lateral enlargement and the vertical drop can be imposed at the outlet of the gate chamber. The hydraulic characteristics along the side-wall are simulated by the detached eddy simulation and the Volume Of Fluid （VOF） method. The numerical results agree well with those of experiment. The experimental and numerical results show that the flow condition is smooth with only a weak water-wing appearing behind the lateral cavity, and the length of the lateral cavity becomes longer and is mainly affected by the size of the lateral enlargement and the zone of negative pressure after the water impacts the side-wall would disappear. The hydraulic characteristics of the new arrangement-scheme are beneficial to the prevention of the cavitation damage in the side-wall and the Detached Eddy Simulation （DES） with the VOF method can well predict the hydraulic characteristics after the new arrangement-scheme of the sudden lateral enlargement and the vertical drop.

关键词： model test aeration to prevent cavitation damage realizable k - ε turbulent model Detached Eddy Simulation (DES) Volume Of Fluid (VOF) method

Effect of Extrusion Strain Path on Microstructure and Properties of AZ31 Magnesium Alloy Sheet

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2015年第10期28卷 1257-1263页

作者： qing-Shan Yang Bin Jiang Zu-Jian Yu qing-Wei dai Su-Qin Luo School of Metallurgy and Material Engineering Chongqing University of Science and Technology Chongqing Academy of Science and Technology

The mechanical properties of AZ31 magnesium alloy sheets processed by different extrusion strain paths were examined in correlation with concurrent microstructure and texture evolution. The conventional extrusion（CE） and asymmetric extrusion（ASE） paths were performed on Mg alloy sheets. The textures at near surface and mid-layer of ASE sheets were various throughout sheet thickness direction as a result of extra asymmetric shear strain. This can stimulate the orientation of（0002） basal planes to incline approximately 12° toward the shear direction. Moreover, the basal texture of ASE sheet was weakened compared with CE one. Enhancing the ambient formability of extruded Mg alloy sheet fabricated by ASE path was accomplished by the tilted weak basal texture.

关键词： Mg alloy Extrusion Microstructure Texture Mechanical property Formability