女子400m个人混合泳成绩分析与研究——以2013年世锦赛叶诗文表现为视角

叶诗文在2013年世界游泳锦标赛的成绩分析发现,在各个泳姿阶段的成绩远差于2012年的伦敦奥运会成绩;从分段速度统计发现虽然叶诗文各分段速度明显落后于前3名运动员,但其转身后的速度不差于前3名运动员,有几个转身后速度还具有明显的优势;叶诗文的训练需要重视蝶泳的第2段,蛙泳的全程段,而优势段的自由泳水平的保持与提高亦是能否再登巅峰的关键。通过统计近3届世界大赛的成绩,分析女子400m个人混合泳进行组内和组间偏相关性得出:前后半程的速度波动产生的影响主要体现在第5段即蛙泳第1分段上。典型相关分析结果和分段间的相互关系分析得出,仰泳的第3段和第4段的速度变化对蛙泳的第5段和第6段有较强的影响作用,仰泳第3段不仅影响蛙泳的第5、6段,还对自由泳的第7、8段产生影响,因此仰泳的第3段的体能分配尤为重要,保证自由泳阶段冲刺能力不受影响的前提下,提高仰泳段的成绩显得尤为重要,但要有所控制,否则结果适得其反。     

关于当代写作教学的几点思考

当代写作教学应在以下几方面进行清理和反思 :要正确认识写作教学的价值 ;要实现由“重文轻言”向“重言轻文”的重心转移 ;要关注儿童的言说方式和童年经验 ,让写作成为心灵成长的档案 ;要认真审视和高度重视作文与育人的关系 ;要更新作文的评价观 ;教师要学会享受学生作文并在学生作文中成长 ;教师写“下水作文”的价值功能需要重新思考。     

用改进单纯形法优化由Matlab曲线拟合得到的表达式

运用改进单纯形法，通过调整有关参数，对由Matlab曲线拟合得到的表达式进行优化，得到精度更高的表达式。     

An integrated DBP for streams with (m,k)-firm real-time guarantee

(m,k)-firm real-time or weakly hard real-time(WHRT)guarantee is becoming attractive as it closes the gap between hard and soft(or probabilistic)real-time guarantee,and enables finer granularity of real-time QoS through adjusting m and k.For multiple streams with(m,k)-firm constraint sharing a single server,an on-line priority assignment policy based on the most recent k-length history of each stream called distance based priority(DBP)has been proposed to assign priority.In case of priority equality among these head-of-queue instances,Earliest Deadline First(EDF)is used.Under the context of WHRT schedule theory,DBP is the most popular,gets much attention and has many applications due to its straightforward priority assignment policy and easy implementation.However,DBP combined with EDF cannot always provide good performance,mainly because the initial DBP does not underline the rich information on deadline met/missed distribution,specially streams in various failure states which will travel different distances to restore success states.Considering how to effectively restore the success state of each individual stream from a failure state,an integrated DBP utilizing deadline met/missed distribution is proposed in this paper.Simulation results validated the performance improvement of this proposal.     

论学校管理的教育关怀

管理作为一门“道德技术”在学校教育的领域中应该发挥育人的教育性功能，但是管理的内在追求与教育的内在追求在本质上有发生抵牾的可能。因此，应该在学校管理的全过程中融入教育关怀，以使“教育的管理”发挥“管理的教育”作用。     

Investigating the role of~(99m)Tc-TRODAT-1 SPECT imaging in idiopathic Parkinson's disease

Objective:To investigate the role of ~(99m)Tc-TRODAT-1 SPECT in diagnosis and assessing severity of idiopathicParkinson's disease(PD).Methods:Thirty-eight patients with primary,tentative diagnosis of PD and eighteen age-matchednormal controls were studied with ~(99m)Tc-TRODAT-1 SPECT imaging.The regions of interests(ROIs)were drawn manually oncerebellum(CB),occipital cortex(OC)and three transverse plane slice-views of striatums,the semiquantitative BG(back-ground)/[(OC CB)/2]were then calculated.Results:A lower uptake of ~(99m)Tc-TRODAT-1 in striatums were displayed inthirty-six out of thirty-eight PD patients by visual inspection,compared to controls.In twenty-four PD cases with HYS(Hoehn andYahr scale)stage Ⅰ,a greater loss of DAT uptake was found in striatum and its subregions contralateral striatum to the affectedlimbs than in the same regions of the controls,although the striatal uptake was bilaterally reduced.Using Spearman correlationanalysis showed that the reduction of the uptake ratios signifi     

运用BP算法神经网络拟合传感器的输出特性

首先介绍了BP算法神经网络的基本原理，然后将BP算法神经网络应用于拟合传感器的输出特性，并在MATLAB下通过训练和仿真验证了应用BP算法神经网络拟合传感器的输出特性的优越性。     

论现代绘画艺术的音乐性

西方现代绘画是一种非写实性的表现艺术，造型元素（点、线、形、色）各有其内在音响及表现功能；画面的构成体现出音乐的节秦和韵律，使人产生一种丰富的联想。     

新经济：一种总需求——总供给模型分析

本文采用总需求-总供给模型，对美国“新经济”现象进行了理论分析：认为需求的拉动和供给的推进是美国出现“新经济”的原因；技术创新和外需主导型战略的实施拉动了总需求；信息技术（产业）、全球化以及“里根经济学”的长期效应使AS得以持续扩张。其成功之处对我国经济发展同样有重要借鉴价值。