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Copper foils with gradient structure in thickness direction and different roughnesses on two surfaces fabricated by double rolling

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International Journal of Minerals,Metallurgy and Materials 2013年第12期20卷 1170-1175页

作者： xi-yong wang Xue-feng Liu Wen-jiang Zou Jian-xin xie School of Materials Science and Engineering University of Science and Technology Beijing Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology Beijing Key Laboratory for Advanced Materials Processing Ministry of Education) University of Science and Technology Beijing

Copper foils with gradient structure in thickness direction and different roughnesses on two surfaces were fabricated by double rolling. The two surface morphologies of double-rolled copper foils are quite different, and the surface roughness values are 61 and 1095 nm, respectively. The roughness value of matt surface can meet the requirement for bonding the resin matrix with copper foils used for flexible printed circuit boards, thus may omit traditional roughening treatment; the microstructure of double-rolled copper foils demonstrates an obviously asymmetric gradient feature. From bright surface to matt surface in thickness direction, the average grain size first increases from 2.3 to 7.4 μm and then decreases to 3.6 μm; compared with conventional rolled copper foils, the double-rolled copper foils exhibit a remarkably increased bending fatigue life, and the increased range is about 16.2%.

关键词： copper foils rolling surfaces gradient structure fatigue of materials

Epidermal characters of Tamarix L.(Tamaricaceae) from Northwest China and their taxonomic and palaeogeographic implications

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Journal of Palaeogeography 2018年第2期7卷 179-196页

作者： Jian-Wei Zhang Ashalata D'Rozario Shi-Min Duan xi-yong wang xiao-Qing Liang Bo-Rong Pan xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Department of Botany Narasinha Dutt College Turpan Eremophytes Botanical Garden Chinese Academy of Sciences School of Resource and Environmental Sciences Yuxi Normal University

The taxonomical position of species of the genus Tamarix(Tamaricaceae) has been criticized because of their gross morphological similarities(such as slender, smooth and reddish-brown branches,grey-green foliage and scale leaves), and their systematic relationships remain unclear. In this paper, the leaf epidermal features of 17 species from China are studied based on the micro-morphological characters of the epidermal cells, stomata, salt glands, papillae and epidermal hairs. According to the studies, the leaf epidermal features, together with the character of the flower, are taxonomically clearly distinct. The establishment of Tamarix albiflonum is consolidated. Tamarix korolkowi and Tamarix ramosissima have minimal differences in epidermal characters, and the former is suggested to be a junior synonym. Tamarix ramosissima, Tamarix tarimensis, Tamarix arceuthoides and Tamarix hohenackeri are most similar with respect to their leaf epidermis; considering the common morphological features, habit, distribution and especially the hybridization, it is suggested that these four species are closely genetically related and that the variations among them are probably intraspecific. The new taxonomical evidence indicates the occurrence of13 species and four variants in China. Presently, Tamarix is a typical plant of arid and semi-arid regions, but its Eocene ancestors lived in warm and humid climates in the coastal areas of the ancient Mediterranean ***, the papillae or epidermal hairs, which are outgrowths of the outer epidermal cells facilitating the leaf to respond to water stress and commonly seen in the plants growing in arid or semi-arid areas rather than the plants in warm and humid climates, are of relatively recent origin in Tamarix. The primitive species lack papillae or epidermal hairs, while in evolved species these structures are abundant. Based on the ecological adaptations of the epidermal features, the palaeogeographic implications of Tamarix in the Late

关键词： Anatomy Arid region Epidermis Ecological adaptation Phylogenetic evolution Tamarix Northwest China

Phase separation in solvent extraction of cobalt from acidic sulfate solution using synergistic mixture containing dinonylnaphthalene sulfonic acid and 2-ethylhexyl 4-pyridinecarboxylate ester

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Transactions of Nonferrous Metals Society of China 2019年第5期29卷 1107-1116页

作者： Ting HUANG yong-xi wang Hui-ping HU Fang HU Yu-qing LUO Shi-jun LIU College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

Phase separation rate is a critical character in determining the usefulness of a solvent extraction system in hydrometallurgy. A survey of the synergistic mixture containing dinonylnaphthalene sulfonic acid (HDNNS) and 2-ethylhexly 4-pyridinecarboxylate ester (4PC) for the extraction of cobalt from acidic single metal sulfate solution was carried out to suggest how the physicochemical properties and the morphology of the reverse micelles in the loaded organic phase affect the phase separation. The results show that effective parameters affecting the phase separation are the viscosity and the excess water uptake of the loaded organic phase. It is obvious that the specific settling rate (SSR) decreases with the apparent increase of these two parameters. The measurement of small angle X-ray scattering (SAXS) proves that the morphology of the reversed micelles in the loaded organic phase changes evidently with the change of the specific settling rate (SSR).

关键词： synergistic solvent extraction phase separation specific settling rate reverse micelle cobalt

艺术类院校图书馆数字化特色资源库的构建与研究——以浙江传媒学院为例

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电脑知识与技术 2015年第3X期11卷 159-162页

作者：奚永旺浙江传媒学院浙江杭州310018

该文阐述建设艺术类院校图书馆数字化特色资源库的重要性,以艺术类院校浙江传媒学院为例,构建艺术类院校产学研图书馆特色资源库平台,并利用这一平台,把特色资源与特色服务融入教学与研究中,以扩大特色数字资源的社会共享功能和效用。

关键词：艺术类院校特色资源库数字化建设

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使用SSE技术优化语音识别中的测度计算

计算机工程与应用 2002年第8期38卷 85-86页

作者：汪俊杰赵勇肖熙王作英清华大学电子工程系北京100084

在语音识别中,测度计算占用了整个系统的绝大部分时间。文章介绍了利用SSE技术优化测度计算的方法,实验结果说明SSE技术能大幅提高系统的计算效率。

关键词：测度计算语音识别 SSE技术模板匹配计算机

多巴丝肼片对帕金森模型小鼠中脑线粒体自噬相关基因PINK1表达的影响

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中国临床药理学杂志 2018年第14期34卷 1662-1664页

作者：应小卫李灵晓章永强王希佳温岭市第一人民医院神经内科浙江温岭317500

目的研究多巴丝肼片对帕金森病(PD)模型小鼠中脑线粒体自噬相关基因PTEN依赖的假定激酶1(PINK1)表达的影响。方法将40只C57BL/6雄性小鼠随机分为正常组、模型组、实验组Ⅰ和实验组Ⅱ,各10只。模型组和实验组均腹腔注射25 mg·kg^(-1)1-... 详细信息

目的研究多巴丝肼片对帕金森病(PD)模型小鼠中脑线粒体自噬相关基因PTEN依赖的假定激酶1(PINK1)表达的影响。方法将40只C57BL/6雄性小鼠随机分为正常组、模型组、实验组Ⅰ和实验组Ⅱ,各10只。模型组和实验组均腹腔注射25 mg·kg^(-1)1-甲基-4-苯基-1,2,3,6-四氢吡啶(MPTP)构建PD小鼠模型,正常组腹腔注射等量生理盐水;实验组Ⅰ和实验组Ⅱ分别于建模前后灌服多巴丝肼片125 mg·kg^(-1),每天1次,正常组和模型组小鼠均于建模后灌胃等量生理盐水,各组小鼠均连续干预10 d。用悬挂实验评价各组小鼠行为学改变,用高效液相色谱-荧光检测法(HPLC-FLD)检测左侧中脑和纹状体多巴胺(DA)含量变化,用蛋白免疫印迹法检测右侧中脑PINK1蛋白表达。结果实验组Ⅰ和实验组Ⅱ小鼠悬挂实验评分均较模型组显著升高(P<0.01)。实验组Ⅰ和实验组Ⅱ左侧中脑多巴胺含量分别为(0.19±0.03),(0.21±0.03)μg·g^(-1),纹状体中多巴胺含量分别为(0.79±0.04),(0.82±0.05)μg·g^(-1),与模型组的(0.06±0.03),(0.35±0.12)μg·g^(-1)相比,差异有统计学意义(P<0.01)。模型组小鼠右侧中脑PINK1蛋白相对表达量为(56.12±3.98)%,较对照组明显降低(P<0.01);实验组Ⅰ和实验组Ⅱ小鼠中脑PINK1蛋白相对表达量为(78.45±3.29),(79.12±4.22)%,均较模型组明显升高(P<0.01)。结论多巴丝肼片可缓解PD模型小鼠异常行为,通过提高自噬相关基因PINK1的表达,抑制PD神经毒性作用。

关键词：多巴丝肼片帕金森病线粒体自噬 PTEN依赖的假定激酶1

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大弹涂鱼仔稚鱼和早期幼鱼的消化酶活性

水产学报 2006年第6期30卷 733-739页

作者：吴仁协洪万树张其永陈仕玺王琼厦门大学海洋与环境学院厦门大学海洋与环境学院福建厦门361005

采用酶学分析的方法,研究了大弹涂鱼前期仔鱼、后期仔鱼、稚鱼和早期幼鱼发育过程中胰腺酶、肠酶和胃蛋白酶活性的变化。结果表明,(1)4种胰腺酶(淀粉酶、胰蛋白酶、糜蛋白酶和羧肽酶A)和8种肠酶(麦芽糖酶、蔗糖酶、乳糖酶、海藻糖酶、... 详细信息

采用酶学分析的方法,研究了大弹涂鱼前期仔鱼、后期仔鱼、稚鱼和早期幼鱼发育过程中胰腺酶、肠酶和胃蛋白酶活性的变化。结果表明,(1)4种胰腺酶(淀粉酶、胰蛋白酶、糜蛋白酶和羧肽酶A)和8种肠酶(麦芽糖酶、蔗糖酶、乳糖酶、海藻糖酶、纤维二糖酶、碱性磷酸酶、氨基肽酶和γ-谷氨酰转肽酶)的比活力均在仔鱼期较高,稚鱼期降至最低,早期幼鱼则急剧上升,而每尾鱼酶的总活力却随着幼体的发育而逐渐增加;(2)胃蛋白酶活性在后期仔鱼才开始检测到,此后一直呈显著上升趋势;(3)早期幼鱼肠部位的4种胰腺酶活性分别占其酶总活性的百分比均显著高于稚鱼期;(4)稚鱼期仅3种肠酶(麦芽糖酶、纤维二糖酶和γ-谷氨酰转肽酶)高度富积在肠刷状缘膜上,而早期幼鱼除蔗糖酶外的7种肠酶在肠刷状缘膜上的富集系数均大于5.1。由此得出结论,(1)在仔鱼期,蛋白质的消化是依靠胰腺酶进行的,进入稚鱼期,胃蛋白酶开始对蛋白质的消化起重要作用;(2)在早期幼鱼,胰腺分泌机制及肠细胞已完全成熟,标志着成鱼的消化模式的形成。

关键词：大弹涂鱼仔鱼稚鱼早期幼鱼胃蛋白酶胰腺酶肠酶肠刷状缘膜

Dual-interlayers constructed by Ti_(3)C_(2)T_(x)/ionic-liquid for enhanced performance of solid garnet batteries

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Journal of Energy Chemistry 2023年第3期78卷 47-55,I0002页

作者： xi wang yong wang Yiyu Wu Yunmiao Fan Yang Tian Department of Chemistry Analytical Instrumentation CenterCapital Normal UniversityBeijing 100048China

Li(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO) solid garnet-type electrolyte has been widely reported due to its outstanding safety and electrochemical ***,the inherent rigidity and brittleness of LLZTO lead to poor contact with anode/cathode and the operation failure of full ***,the dual-interlayers are constructed as the fast interfacial ion-migration channel by using Ti_(3)C_(2)T_(x)(MXene,Txis-O,-OH,-F) with trace ionic liquid(IL),which promote the intimate contact between LLZTO and anode/cathode and suppress Li-dendrites ***,IL can wet the cathode to promote intimate interface contact and be decomposed into some inorganic compounds(such as Li3N,LiF,and Li2Sx),resulting in reduced interfacial resistance and fast Li-ion ***,in the prepared Li-symmetric cell,the interfacial resistance on the anode side plunges to 33.1 Ω cm^(-2),and stably maintains over 1000 h without short circuit at 0.05 mA cm^(-2).The full cell of Li|LiFePO4delivers a high initial capacity of 158.52 mA h g^(-1)and outstanding retention of 90.18% after 100 cycles at 60℃ and 0.2 *** work provides an efficient strategy to design dual-interlayers between LLZTO and anode/cathode for the interfacial modification to enhance the performance of solid garnet batteries.

关键词： MXene composite Interfacial modiﬁcation Garnet electrolyte Solid battery Ion-transportation

Design of coordinator to eliminate redundant local retransmission in wireless networks

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The Journal of China Universities of Posts and Telecommunications 2007年第3期14卷 63-69页

作者： FANG xi wang Jun wang yong JIANG Feng Wireless Technology Innovation Institute Beijing University of Posts and Telecommunications Beijing 100876 China

Owing to limited bandwidth, high bit error rate, and bursty error in the wireless environment, the performance of the transmission control protocol （TCP） degrades greatly in wireless networks. Up to now, many researchers have contributed greatly to the wireless TCP field. However, in most of their works, the wireless TCP module usually works in the TCP layer and has no idea of the actual time of the packet transmission, which is determined by the Scheduler in the media access control （MAC） layer, and this will bring the inaccuracy to the local retransmission fimeout and induce the redundant local retransmission. In this article, a coordinator is introduced into the base-station （BS）, which can provide efficient cooperation between the TCP module and the scheduler module. On the bais of the performance analysis and simulation results, the proposed method is shown to eliminate redundant local retransmission, increase throughput, and improve TCP-level fairness in wireless networks. Moreover, this scheme is orthogonal to those existing wireless TCP schemes, thus it can give great compatibility to the current networks, and further enhance the performance of TCP under the condition that the performance improvement benefiting from the existing approaches will not be affected.

关键词： TCP wireless network coordinator scheduling throughput fairness