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小说《毒瘾难戒》被视为澳大利亚一部女性主义的先锋之作。该小说的成功最重要的因素之一就在于作者加纳的语言艺术,她很善于使用形象具体的词语将抽象的人物内心表达出来,语言细腻而流畅。本文精选了小说中一些有特色的语句,从文学文体学的角度,在语相层、词汇层、句法层、修辞层四个层次上分别进行分析,以帮助读者更好地欣赏该作品朴实、形象和细腻的语言特色并借此更好地体会女主人公痛苦矛盾的内心状态。徐小琴 相似文献
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握力作为一项简单、无创的上肢肌肉力量测试指标而为人们所关注,越来越多的研究显示握力测试应用于临床也是适合的。这篇文献综述概述了在临床医学和流行病学领域里老年人握力的关联与预测,同时也描述了握力与体适能之间的关系。 相似文献
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网球运动要求在对抗中应想尽一切办法调动对手，尽力上网击球，而双手反拍打法正是具有凶狠、刁难、隐蔽性强的特点。针对我国网球运动员身材偏矮、力量偏小，但步伐灵活这一特点，选择双手反拍打法是比较合适的。 相似文献
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A cinematographic analysis of the drive off the front foot (D) and the forward defensive stroke (FD) was undertaken to establish the kinematic and kinetic factors involved in playing these strokes against medium-fast bowling. Fourteen provincial cricket batsmen were filmed at 100 Hz while batting on a turf pitch with a specially instrumented bat. Results for the drive off the front foot revealed that the movement and stroke pattern were generally supportive of the coaching literature, with the forward defensive stroke forming the basis of the drive. Certain mechanical differences, although non-significant, were evident to facilitate the attacking nature of the front foot drive and included a higher backlift (FD = 0.65 m; D = 0.74 m), later commencement of the stride (FD = 0.64 s pre-impact; D = 0.58 s pre-impact) and downswing of the bat (FD = 0.38 s pre-impact; D = 0.36 s pre-impact), a shorter front foot stride (FD = 0.72 m; D = 0.68 m) with the front foot placement taking place later (FD = 0.14 s pre-impact; D = 0.06 s pre-impact), and the back foot dragging further forward at impact (FD = 0.05 m; D = 0.10 m). The front upper limb moved as a multi-segmental series of levers, which resulted in the drive showing significantly greater (P < 0.05) peak bat horizontal velocity at 0.02 s preimpact (FD = 3.53 ± 3.44 m . s -1 ; D = 11.8 ± 4.61 m . s -1 ) and 0.02 s post-impact (FD = 2.73 ± 2.88 m . s -1 ; D = 11.3 ± 4.21 m . s -1 ). The drive showed a significantly greater (P < 0.05) bat-ball closing horizontal velocity (FD = 24.2 ± 4.65 m . s-1; D = 32.3 ± 5.06 m . s -1 ) and post-impact ball horizontal velocity (FD = 6.85 5.12 m . s -1 ; D = 19.5 ± 2.13 m . s -1 ) than for the forward defensive stroke. The point of bat-ball contact showed nonsignificant differences, but occurred further behind the front ankle (FD = 0.09 ± 0.17 m; D = 0.20 ± 0.13 m), with the bat more vertical at impact (FD = 62.6 ± 6.53 ; D = 77.8 ± 7.05). Significant differences (P < 0.01) occurred between the grip forces of the top and bottom hands for the two strokes, with the principal kinetic finding that the top hand plays the dominant role during the execution of the drive with the bottom hand reinforcing it at impact. Similar grip force patterns for the two strokes occurred during the initial part of the stroke, with the drive recording significantly greater (P < 0.05) forces at 0.02 s pre-impact (top hand: FD = 129 ± 41.6 N; D = 199 ± 40.9 N; bottom hand: FD = 52.2 ± 16.9 N; D = 91.8 ± 41.1 N), at impact (top hand: FD = 124 ± 29.3 N; D = 158 ± 56.2 N; bottom hand: FD = 67.1 ± 21.5 N; D = 86.2 ± 58.2 N) and 0.02 s postimpact (top hand: FD = 111 ± 22.2 N; D = 126 ± 28.5 N; bottom hand: FD = 65.5 ± 26.9 N; D = 82.4 ± 28.6 N). 相似文献
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Delphine Chadefaux Guillaume Rao Jean-Loïc Le Carrou Eric Berton Laurent Vigouroux 《Journal of sports sciences》2017,35(12):1155-1164
The aim of this article is to characterise the extent to which the dynamic behaviour of a tennis racket is dependent on its mechanical characteristics and the modulation of the player’s grip force. This problem is addressed through steps involving both experiment and modelling. The first step was a free boundary condition modal analysis on five commercial rackets. Operational modal analyses were carried out under “slight”, “medium” and “strong” grip force conditions. Modal frequencies and damping factors were then obtained using a high-resolution method. Results indicated that the dynamic behaviour of a racket is not only determined by its mechanical characteristics, but is also highly dependent on the player’s grip force. Depending on the grip force intensity, the first two bending modes and the first torsional mode frequencies respectively decreased and increased while damping factors increased. The second step considered the design of a phenomenological hand-gripped racket model. This model is fruitful in that it easily predicts the potential variations in a racket’s dynamic behaviour according to the player’s grip force. These results provide a new perspective on the player/racket interaction optimisation by revealing how grip force can drive racket dynamic behaviour, and hence underlining the necessity of taking the player into account in the racket design process. 相似文献
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Handling errors are often seen in professional rugby games and even more so in amateur rugby. This paper analyses the problem
of ball mishandling using high-speed video footage of passes and a bespoke finger friction rig. The high-speed video analysis
showed that when the ball is caught, often there is a fluctuating movement of the fingers over the surface of the ball. It
also showed that the fingers move over the surface of the ball when the ball is thrown, confirming that the dynamic friction
is a good measure of how easily a ball can be handled. Rugby ball surface samples were used, on a finger friction rig, to
assess the coefficient of friction between the finger and the balls. The currently manufactured balls displaying the highest
coefficients of friction in clean, dry conditions were the design with square, ‘sharp’ pimples and also the design with a
mixture of small and large pimples. The most consistent ball across wet and dry conditions was the ball with round, large,
densely populated pimples. It was also shown that when water is added to the surface of the ball or finger, there was little
variation in performance between the ball varieties. 相似文献
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Magnesium carbonate, or ‘chalk’, is used by rock climbers to dry their hands to increase the coefficient of friction, thereby improving the grip of the holds. To date, no scientific research supports this practice; indeed, some evidence suggests that magnesium carbonate could decrease the coefficient of friction. Fifteen participants were asked to apply a force with the tip of their fingers to hold a flattened rock (normal force), while a tangential force pulled the rock away. The coefficient of friction – that is, the ratio between the tangential force (pulling the rock) and the normal force (applied by the participants) – was calculated. Coating (chalk vs no chalk), dampness (water vs no water) and rock (sandstone, granite and slate) were manipulated. The results showed that chalk decreased the coefficient of friction. Sandstone was found to be less slippery than granite and slate. Finally, water had no significant effect on the coefficient of friction. The counter-intuitive effect of chalk appears to be caused by two independent factors. First, magnesium carbonate dries the skin, decreasing its compliance and hence reducing the coefficient of friction. Secondly, magnesium carbonate creates a slippery granular layer. We conclude that, to improve the coefficient of friction in rock climbing, an effort should be made to remove all particles of chalk; alternative methods for drying the fingers are preferable. 相似文献
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身处不同时代两位女作家的作品《莫里斯·格斯特》和《毒瘾难戒》反映了同一个主题：无法实现之爱。本文作者正是抓住这一相同点，从作品的结构、情节、人物性格入手，探析两部作品的作者各自对所处时代的变迁持有的态度，从中发现她们的社会道德观——一个是理性、谨慎，一个是感性、奔放。通过对作品深层解读，以帮助读者更好地欣赏这两部巨作。 相似文献
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The development of big data and Internet of things (IoT) have brought big changes to e-commerce. Different kinds of information sources have improved the consumers’ online shopping performance and make it possible to realize the business intelligence. Grip force and eye-tracking sensors are applied to consumers' online reviews search behavior by relating them to the research approaches in IoT. To begin with, public cognition of human contact degrees of recycled water reuses with grip force test was measured. According to the human contact degrees, 9 recycled water reuses presented by the experiment are classified into 4 categories. Based on the conclusion drawn from grip force test, purified recycled water and fresh vegetable irrigated with recycled water are regarded as the drinking for high-level human contact degree and the irrigation of food crops for low-level human contact degree respectively. Several pictures are designed for eye-tracking test by simulating an on-line shopping web page on Taobao (the most popular online shopping platform in China). By comparing the fixation time participants spent on the areas of interest (AOIs), we justify that consumers' online reviews search behavior is substantially affected by human contact degrees of recycled products. It was found that consumers rely on safety perception reviews when buying high contact goods. 相似文献