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2006年高考,全国及各省、市共命制了与物理学科相关的8套理科综合试卷和3套单科试卷.《物理通报》从2006年第6期开始,对每套物理试题已作了详细的讨论评析.现对2006年全国高考物理试题从总体角度对命题基本思路和基本特征及启示作出综合评析,以期引起广大物理教师对此的思考研究. 相似文献
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一、高考中物理实验考核的现状与问题众所周知,在大规模考试中组织实验操作考试困难很大,在现有的条件下困难就更大.作为权宜之计,以实验笔试代替操作考试也不失为一种办法.从历年高考物理试题看来,高考中物理实验笔试题有如下主要特占[1,2]:1.有逐年加大实验笔试题比例的趋势,反映出对考查实验能力的重视,但另一方面,绝对分数的增加并不大;2,题型趋于稳定;3.考查日趋全面,涉及实验原理、步骤、仪器使用、器材选择、读数记录、实物图连接、看图改错、数据处理等.由此可见,高考中对实验笔试的考核办法已经成熟和定型,对促… 相似文献
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【例1】据说某国外餐馆为招揽顾客想制作一块1m^3的特大豆腐,结果豆腐瘫软而告失败.其实即使是坚硬的岩石处在太高山体的底部也会瘫软.这是因为山峰高度到一定程度后,岩石基部压强过大,会发生熔化而开始流动的缘故. 相似文献
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提纲:
1.物理教育研究(PER):
了解学生究竟学到了什么?(什么没学到)?
2.课程选项:基于研究的材料
3.重新审视我们的目标:隐藏了的课程
4.教导学生如去思考:
学会去学习理科课题 相似文献
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物理学是一门以实验为基础的自然学科,大量的物理概念、规律、原理都是通过实验发现、总结、归纳得出的.物理实验的作用通常可以概括为六点:(1)丰富感性认识,提高学习兴趣;(2)突破重点难点,理解概念规律;(3)形成物理图像,认识物理过程;(4)启发学生思维,增强探索精神;(5)培养观察能力,掌握实验技能;(6)养成良好习惯,学会科学方法.而演示实验作为物理教学的一种重要的方法和手段, 相似文献
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利用图象研究物理规律,具有形象直观,物理动态过程清晰等优点.它可以培养学生分析和运用图象解决问题的能力,对帮助学生认识物理规律,理解物理概念都是十分必要的. 相似文献
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In this paper the IRIS (Integrated Router Interconnected spectrally), an optical domain architecture for datacenter network is analyzed. The IRIS integrated with advanced modulation formats (M-QAM) and coherent optical receiver is analyzed. The channel impairments are compensated using the DSP algorithms following the coherent receiver. The proposed scheme allows N2 multiplexed wavelengths for N×N size. The performance of the N×N-IRIS switch with and without wavelength conversion is analyzed for different Baud rates over M-QAM modulation formats. The performance of the system is analyzed in terms of bit error rate (BER) vs OSNR curves. 相似文献
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C. M. Miller 《Optical and Quantum Electronics》1972,4(4):367-377
The probe volume of the dual beam laser Doppler velocimeter is analyzed from a geometrical standpoint. The volume is graphically reconstructed and the existence of the characteristic dual beam laser Doppler velocimeter fringes is demonstrated. The fringes are analyzed and are shown to be composed of moving tubes or pockets of coherent radiation. The composition of the light is analyzed and the extent of the coherence of the laser radiation within the light pockets is considered. The scattered light from the tubes is analyzed and the coherence enhancement of the fringe structure is shown. This information is used in an attempt to resolve the controversy as to whether the dual beam laser Doppler velocimeter is governed by a fringe counting phenomena or by a beating phenomena of light from two sources of coherent radiation of different frequencies. 相似文献
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本文对于CO2超临界流体的等熵膨胀和等焓膨胀过程进行了热力学分析、计算和对比,发现等熵膨胀过程与等焓膨胀相比,增大了有效制冷量,增大的数值略大于所回收的膨胀功.而且对于减小节流损失的回热循环和膨胀机循环进行了分析和对比,对于选用原则给出了具体的判定方法.本文还进行了膨胀机中膨胀过程的热力学分析,分别得出了超临界区和两相区的膨胀功来源,及变化规律.经分析,本文作者认为可以采用"闪蒸破碎模型"简化汽液两相流绝热膨胀基本特性方程.最后,本文对膨胀机实际工作的不可逆因素进行了分析. 相似文献
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Charles Elachi 《Applied Physics A: Materials Science & Processing》1974,5(2):159-164
A novel technique of generation of acoustic microwave is analyzed. The basic principle is similar to the distributed feedback
concept used in lasers, where the oscillation feedback is provided by a periodic structure throughout the amplifying medium.
A simplified model is analyzed in detail, and a number of configurations for oscillator device development are discussed. 相似文献
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Vibrations of a textile machine rotor 总被引:1,自引:0,他引:1
L. Cvetićanin 《Journal of sound and vibration》1984,97(2):181-187
In this paper the vibrations of a textile machine rotor, whose angular velocity is constant, are analyzed. The function of the rotor is to wind up a band of textile material into a roll. The elastic force in the shaft is assumed to be non-linear. First the free vibrations of this rotor are analyzed analytically and numerically. The results are compared. After that the vibrations in the non-resonant case are analyzed. The solution is found by use of the analytical method of multiple scales. The results for free vibrations and for the non-resonant case are compared. 相似文献
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In order to accurately control the oxidation aperture in high power vertical cavity surface emitting lasers (VCSELs), the selective oxidation process is studied with experiments. Selective oxidation experiments are carried out upon the simulate wafer of VCSELs at different temperature. Oxidation products are examined at different oxidation depths of oxidation layer and each component content is analyzed. The results of the experiments are analyzed with the kinetics of thermal diffusion. The analyzed results show that the concentration of oxidant is e exponentially declined with increasing depth of oxidation in high-power VCSELs. The oxidation depth stability and precision can be improved by lowering the oxidation temperature and prolonging the oxidation time. 相似文献
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