摘要：记得早在几年前,我们已开始讨论高清播放机的发展前景,当时高播机主要是为播放高清节目而诞生,后来又加入了安装硬盘的设计,有人就称它为硬盘播放机,再到后来网络接入功能的导入,高播机又摇身一变成为网络播放机。尽管高清播放机的功能得到了逐步强化,但是高清影音播放才是它的最核心内容,也是每一台高清播放机价值的最终体现。踏入2010年的深秋,高清播放市场即将迎来最后的冲刺阶段,不少品牌纷纷推出了自家含金量最高且最具分量的影音产品,就像杰科这款GK-HD280,这是杰科目前推出的功能最强悍、实用性最佳的高清播放产品,年底想要购买高清播放机的朋友可要注意了。

摘要：To design an effective and realistically applicable sinter bonding process for power devices,we proposed a two-step process using a 200 nm Cu-particle-based paste to form a bondline having high-temperature sustainability and superior thermal *** process involved rapid pressure-assisted sinter bonding in air followed by pressureless annealing in a nitrogen *** the case of a paste prepared with a mixture of 20 wt.%malic acid and 80 wt.%ethylene glycol,sinter bonding at 300℃and 5 MPa for only 30 s resulted in a sufficient shear strength of 23.1 *** shear strength was significantly enhanced to 69.6 MPa by the additional pressureless aging for 30 ***,the two-step sinter bonding process is expected to provide an outstanding production rate as a next-generation sinter bonding process.

摘要：Although metal oxide-zeolite hybrid materials have long been known to achieve enhanced catalytic activity and selectivity in NO_(x)removal reactions through the inter-particle diffusion of intermediate species,their subsequent reaction mechanism on acid sites is still unclear and requires *** this study,the distribution of Brønsted/Lewis acid sites in the hybrid materials was precisely adjusted by introducing potassium ions,which not only selectively bind to Brønsted acid sites but also potentially affect the formation and diffusion of activated NO *** in situ diffuse reflectance infrared Fourier transform spectroscopy analyses coupled with selective catalytic reduction of NO_(x)with NH_(3)(NH_(3)-SCR)reaction demonstrate that the Lewis acid sites over MnO_(x)are more active for NO reduction but have lower selectivity to N_(2)than Brønsted acids ***ønsted acid sites primarily produce N_(2),whereas Lewis acid sites primarily produce N_(2)O,contributing to unfavorable N_(2)*** Brønsted acid sites present in Y zeolite,which are stronger than those on MnO_(x),accelerate the NH_(3)-SCR reaction in which the nitrite/nitrate species diffused from the MnO_(x)particles rapidly convert into the N_(2).Therefore,it is important to design the catalyst so that the activated NO species formed in MnO_(x)diffuse to and are selectively decomposed on the Brønsted acid sites of H-Y zeolite rather than that of MnO_(x)*** the physically mixed H-MnO_(x)+H-Y sample,the abundant Brønsted/Lewis acid sites in H-MnO_(x)give rise to significant consumption of activated NO species before their inter-particle diffusion,thereby hindering the enhancement of the synergistic ***,we found that the intercalated K+in K-MnO_(x)has an unexpected favorable role in the NO reduction rate,probably owing to faster diffusion of the activated NO species on K-MnO_(x)than H-MnO_(x).This study will help to design promising metal oxide-zeolite hyb

摘要：该文综述了对称和非对称型摩擦耗能连接40多年以来的发展历史和研究现状。摩擦耗能连接可用于结构的减震耗能,通过合理设计可实现地震作用下带摩擦耗能连接结构的低损伤,提高结构的韧性。研发滞回性能稳定、重复性好的摩擦耗能连接是相关研究的主要目标之一。该文从微观和宏观两个方面介绍了金属滑移面之间的摩擦磨损机理,从摩擦磨损的角度讨论了不同摩擦片材料对摩擦连接减震性能的影响。描述了螺栓预紧力大小对摩擦连接减震性能的影响,也总结了摩擦连接的抗腐蚀和抗火性能。阐述了摩擦耗能连接在钢结构支撑、梁柱节点和柱脚节点的应用,并介绍了相关节点的设计方法。对此类连接的关键技术进行了总结,并对该技术的后续研究进行了展望。

摘要：We review a recent work on masses of mesons and nucleons within a hard wall model of holographic QCD in a unified *** order to treat meson and nucleon properties on the same footing,we introduced the same infrared （IR） cut for both *** framework of present approach,the best fit to the experimental data is achieved introducing the anomalous dimension for baryons.

摘要：Reproducibility of clinical output is important when investigating therapeutic efficacy in pre-clinical animal *** to its physiological relevance,a swine myocardial infarction(MI)model has been widely used to evaluate the effectiveness of stem cells or tissue-engineered constructs for ischemic heart *** methods are used to induce MI in the swine ***,it is difficult,using these approaches,to obtain a similar level of functional outcomes from a group of animals due to interpersonal variation,leading to increased experimental ***,in order to minimize human intervention,we developed an approach to use a customized occluder that has dimensional similarities with that of the coronary artery of animals in the case of the swine *** carried out angiography to measure the diameter of the middle left anterior descending artery of each individual animal to fabricate the customized occluder using a 3D-printing *** fabricated occluder contained a central hole smaller than that of the targeted middle left anterior descending artery to mimic an atherosclerotic coronary artery that has an approximately 20%blocked ***,the 3D-printed occluder can provide continuous blood flow through the central pore,indicating a high survival rate(88%)of up to 28 days *** method showed the possibility of creating consistent myocardial infarction induction as compared to the conventional representative closed-chest method(50%survival rate),thus highlighting how our method can have a profound effect on accelerating reliable experiments for developing new therapeutic approaches to ischemic heart diseases.

摘要：创意活动激发社会活力与经济增长,在现代社会扮演日益重要的角色。创意社区这一独特的社会现象,则依赖集体灵感激励社会经济政策改革。Heyri艺术村作为稳定且可持续的创意社区,其模式值得研究。研究以"社区建设"为理论基石,揭示创意社区的社会价值,指出创意社区营建机制的核心要素及作用机制。以韩国Heyri艺术村为案例,深入挖掘其生成机制及运行机制,探究社区成员及社区环境两个核心要素在社区营建过程中的相互作用,并最终提炼其内在发展机制。

摘要：你在透过显示器看世界的时候，也在被世界上革个角落的另一群人了如指掌——电脑的普及带给我们方便登陆的网络、触手可及的世界。以及，充满了科技含量的，危险。

摘要：录像艺术脱胎于20世纪初的实验电影,在数字信息时代,受新媒体艺术与技术影响,录像艺术以当代艺术的观念和表现手法与电影的媒介特性相融合,通过艺术家在录像艺术的表达方法、媒介语言和特性等方面的不断实验和探索,录像艺术自身独特的美学特性得以不断拓展。本文通过不同类型的录像艺术作品案例,具体分析和论述录像艺术在录像媒介、语言表达等方面产生的纪录性美学特征。

摘要：研究了由单铜辊真空熔融纺丝技术制备的扁平带状铁基磁性非晶态合金Fe(85-x)CoxTi7Hf6B2(x=20, 30, 35,原子分数)的电学特性。这种软铁磁性非晶合金与其他含FeCo类合金一样,当Co含量达到30%附近时其饱和磁化强度会呈现最大值。尽管如此,体系中Co含量的改变并没有对这种铁基非晶合金的磁性能产生较大的影响。值得注意的是,在这种铁基非晶合金体系中Co含量的改变可导致其电学特性发生显著的转变。比如:当Co含量为20%时,其电阻温度系数为负值,表现出类似于半导体的电阻温度特性和P型半导体的电学特性;然而,当Co含量增加到30%和35%时,其电阻温度系数则转变为正值,呈现出类似一般金属导体的电阻温度特性。不仅如此,根据该非晶合金中各组成元素的电负性和电离势揭示了Co含量可调控载流子(空穴)浓度的物理机制,为新型铁基非晶合金材料的设计提供新方法。