比较“精神顿悟”和“重要瞬间”的写作技巧

以乔伊斯的《一片浮云》和伍尔夫的《墙上的斑点》为例,分析了“精神顿悟”和“重要瞬间”写作技巧上的相似处和不同点。指出两者皆由外界事物引发,反映人物的心理瞬间,促成人物的顿悟和意识的流动。其不同点在于“精神顿悟”是故事循序渐进过程的必然产物,重在揭示社会背景,而“重要瞬间”与故事情节和人物刻画无关,重在抒发个人的人生瞬间感悟。     

Anisotropic fluoride nanocrystals modulated by facet-specific passivation and their disordered surfaces

Rutile-type fluorides have been proven to be active components in the context of emerging antiferr-omagnetic devices. However, controlled synthesis of low-dimensional, in particular two-dimensional (2D), fluorides in a predictable and deterministic manner remains unrealized because of a lack of efficient anisotropic control, which impedes their further development in reduced dimensions. We report here that altered passivation of {110} growing facets can direct the synthesis of rutile-type fluoride nanocrystals into well-defined zero-dimensional (0D) particulates, one-dimensional (1D) rods and 2D sheets in a colloidal approach. The obtained nanocrystals show positive exchange bias and enhanced magnetic transition temperature from the coexistence of long-range antiferromagnetic order and disordered surface spins, making them strong alternatives for flexible magnetic devices and sensors.     

Equatorial aurora: the aurora-like airglow in the negative magnetic anomaly

The most fantastic optical phenomena in the Earth''s upper atmosphere are the auroras. They are highly informative indicators of solar activity, geomagnetic activity, upper atmospheric structures and dynamics, and magnetospheric energetic particles. An area where the geomagnetic field differs significantly from the expected symmetric dipole, such as at the South Atlantic Anomaly, where the magnetic field intensity is low, gives rise to stronger precipitation of energetic particles into the upper atmosphere. Impact excitation and the subsequent airglow emissions exhibit aurora-like dynamic signatures. Nomenclatures of nonpolar aurora or equatorial auroras are similar to those used with the polar auroras owing to their similar excitation mechanisms. This paper provides an overview of the knowledge and the challenges concerning auroral activity at the South Atlantic Anomaly, or more generally, at the negative magnetic anomaly. We emphasize systematic investigation of the equatorial auroras to reveal the temporal and spatial evolution of the magnetic anomaly and the behaviour of energetic particles in near-Earth space.     

Reciprocal Versus Nonreciprocal Assessment of Knee Flexors and Extensors in Concentric Actions Using the CON-TREX Multijoint Isokinetic Dynamometer: A Reliability Study

Knee flexor and extensor muscular assessment via isokinetic dynamometry is common practice and established in the research literature. However, reporting assessment methodology regarding reciprocal and nonreciprocal movements is often vague or absent. Such methodological issues are crucial for accurate assessments. Therefore, knee extensor and flexor peak moment using either reciprocal movement or nonreciprocal modalities was assessed. Fifteen participants performed three blocks of five concentric muscle actions at three angular velocities [1: nonreciprocal (maximal active flexion followed by passive extension); B2: reciprocal (maximal active extension followed by maximal active flexion); B3 nonreciprocal (maximal active extension followed by passive flexion)]. ANOVA revealed statistically significant within-subject modality effects for peak knee extensor moment and flexor velocity and modality differences (p < .05). Reciprocal and nonreciprocal assessments give significantly different results, with nonreciprocal giving higher peak moments. Reporting which modality is used is crucial to allow for greater clarity for the reader and practitioner.     

圆形载流线圈沿一直径折成直角可看作磁偶极子

从磁偶极子的特点出发,用毕奥—萨伐尔定律、安培力公式和力矩的定义,推导出用磁矩表示的圆形载流线圈沿一直径折成直角的远场及其在均匀磁场中所受的磁力和磁力矩,指出此非平面载流线圈可看作磁偶极子.     

扩散工艺对6.5%WtSi高硅钢性能的影响

本文简要介绍了用电沉积-扩散工艺制造Fe-65mg.g-1高硅钢片的研制工作。电沉积工艺具有低温沉积、无强烈腐蚀、无污染、成本低、工艺操作性好的特点。对于0.5mm厚的硅钢片,用电沉积-扩散工艺处理后的磁性能为:P1.5/50=1.86 w/kg,P0.2/10000=103.2w/kg,B5000=1.64T,磁性能可与日本NKK公司CVD工艺产品相媲美。     

结构基因组学与蛋白质核磁共振(NMR)光谱

阐述了核磁共振光谱在蛋白质结构基因组学研究中的重要作用,包括核磁共振光谱在结构基因组学研究中的优点和缺点,研究技术进展和展望。     

微波和脉冲磁场复合作用下鲜切哈密瓜杀菌实验研究

本文进行了微波和脉冲磁场复合作用下鲜切哈密瓜的杀菌实验研究,考察了微波预处理,磁场强度,脉冲次数及初始茵落总数对杀菌效果的影响。研究结果表明：微波和脉冲磁场的复合处理可以有效杀死鲜切哈密瓜中的细菌,茵落总数的最大杀菌率可以达到99．9％;12s的微波预处理可以起到物料升温与一定的杀菌作用,为脉冲磁场下鲜切哈密瓜的杀菌创造了有利条件;当磁场强度为0．6T时,随着脉冲作用次数的增加,菌落总数先下降,后有所增加,其转折点为20;当脉冲数为10时,随着磁场强度的增加,茵落总数总体上呈下降的趋势;初始菌落总数的增加有利于微波杀菌效果的提高,但对脉冲磁场的杀菌效果影响较小。     

跳远起跳动作的计算机模拟

选取跳远起跳作为计算机模拟的动作对象,建立了内含颤摆质量的起跳力学模型,并在计算机上实施运动模拟。结果表明,研究所建立的起跳模型基本反映了人体在受到外界冲击时的缓冲特性,弥补了以往研究中采用力学碰撞理论来解决冲击问题所带来的不足之处。同时,也解决了以往研究不能完全得到地面约束反力或得到的地面力与真实情况相距较远的问题。     

中国武术与奥林匹克的理性认识

文章运用文献资料法,对中国武术和奥林匹克的特点进行了探讨与分析,总结了它们形成各自特点的根源和存在的环境,挖掘和比较了它们的文化差异,并发现中国武术在世界范围内的普及与推广过程中受各种内外因素的制约研究表明中国武术进入奥林匹克时机尚未成熟