新课程下“动感习得”课堂教学模式在政治教学中的应用与研究

新课程倡导"自主学习、合作学习、探究学习"。作为新课改下的思想品德课教师,在教学中,如何探索、研究、创建具有自己特色的教学模式——即"动感习得"课堂教学模式,让学生在互动中感受知识,在练习中获得知识,优化课堂教学,改进教育教学质量,提高学生的综合素质和能力意义深远。

适应新教材特点 初探动感教学模式

根据教育部《关于中等职业学校德育课程设置与教学安排的意见》的要求,中等职业学校的德育课在课程设置和教学安排上进行了重大改革.从2001年开始,中等职业学校的德育教学采用新教材.新教材在理论体系、组织结构和阐述方法等方面作了新的尝试,也对中等职业学校的德育教学工作提出了新的要求.因此,我们一方面要研究新教材,依托新教材;另一方面,更要积极地转变观念、开拓新思路、探索新方法,建立新的德育教学模式,使德育课的教学效果得到升华.

胡塞尔感知现象学中的两种统觉模式——兼论感觉内容的意向性问题

统觉问题是胡塞尔感知现象学的核心问题。胡塞尔现象学重点介绍了两种统觉模式:"立义内容—立义"的统觉模式和"动感—图像"的统觉模式。第一种统觉模式坚持了无意向性的立义内容(感觉内容)和有意向性的立义活动之间的区分,事物的统觉过程即立义活动赋予感觉内容以意义的过程,该模式适用于静态现象学的分析;第二种统觉模式认为感觉内容并非最终之物,它本身具有特殊的意向性,是在动感和感觉图像的关联中自身构造起来的,在此基础上,立义活动以及统觉对象也才能构造起来,该模式适用于发生现象学的分析。

浅谈如何提高小学高年级数学教学有效性

在小学阶段,相对于低年级而言,高年级数学的学习难度有较为明显的提升,有的学生可能不太适应,因此,提高小学高年级数学教学的有效性是数学教师一直探究的问题。而构建动感教学模式、创设恰当的教学情境、运用生活教学法以及开展合作学习,都是提高小学高年级数学教学效率的有效方法,本文将展开具体的探讨。

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培养兴趣,体验快乐

初中美术教学中培养学生学习兴趣,不仅是初中美术教学题中之义,还是每一位美术教师应尽之责。基于此,初中美术教师需要把学生学习兴趣的培养作为自己的主要任务,使学生欢欢喜喜地欣赏美术作品,快快乐乐地进行美术创作。下面,本文立足于初中美术教学实践,就初中美术教学中学生兴趣的培养这一话题进行探究,希望对广大教师有效培养学生美术学习兴趣带来一些帮助。

EXTENDED MONTE CARLO LOCALIZATION ALGORITHM FOR MOBILE SENSOR NETWORKS

A real-world localization system for wireless sensor networks that adapts for mobility and irregular radio propagation model is considered. The traditional range-based techniques and recent range-free localization schemes are not well competent for localization in mobile sensor networks, while the probabilistic approach of Bayesian filtering with particle-based density representations provides a comprehensive solution to such localization problem. Monte Carlo localization is a Bayesian filtering method that approximates the mobile node's location by a set of weighted particles. In this paper, an enhanced Monte Carlo localization algorithm-Extended Monte Carlo Localization (Ext-MCL) is proposed, i.e., the traditional Monte Carlo localization algorithm is improved and extended to make it suitable for the practical wireless network environment where the radio propagation model is irregular. Simulation results show the proposal gets better localization accuracy and higher localizable node number than previously proposed Monte Carlo localization schemes not only for ideal radio model, but also for irregular one.

Sensibility to Changes of Vibrational Modes of Excited Electron： Sum Frequency Signals Versus Difference Frequency Signals

In this paper, we investigate a two electronic level system with vibrational modes coupled to a Brownian oscillator bath. The difference frequency generation （DFG） signals and sum frequency generation （SFG） signals are calculated. It is shown that, for the same model, the SFG signals are more sensitive than the DFG signals to the changes of the vibrational modes of the electronic two-level system. Because the SFG conversion efficiency can be improved by using the time-delay method, the findings in this paper predict that the SFG spectrum may probe the changes of the microstructure more effectively.

Infrared Sensor with Liquid Crystal Chopper

An infrared sensor using the liquid crystal chopper is presented. The infrared sensor is designed to detect infrared rays with a pyroelectric element used as a liquid crystal chopper in such an infrared sensor or the like.

Feeding behavior and gene expression of appetite-related neuropeptides in mice lacking for neuropeptide Y Y5 receptor subclass

Neuropeptide Y (NPY) is a potent neurotransmitter for feeding. Besides NPY, orexigenic neuropeptides such as agouti-related protein (AgRP), and anorexi- genic neuropeptides such as α-melatonin stimulating hormone (MSH) and cocaine-amphetamine-regulated transcript (CART) are also involved in central feeding regulation. During fasting, NPY and AgRP gene expressions are up-regulated and POMC and CART gene ex- pressions are down-regulated in hypothalamus. Based on the network of peptidergic neurons, the former are involved in positive feeding regulation, and the latter are involved in negative feeding, which exert these feeding-regulated peptides especially in paraventricular nucleus (PVN). To clarify the compensatory mecha- nism of knock-out of NPY system on feeding, change in gene expressions of appetite-related neuropeptides and the feeding behavior was studied in NPY Y5-KO mice. Food intake was increased in Y5-KO mice. Fasting increased the amounts of food and water intake in the KO mice more profoundly. These data indicated the compensatory phenomenon of feeding behavior in Y5-KO mice. RT-PCR and ISH suggested that the compensation of feeding is due to change in gene expressions of AgRP, CART and POMC in hypothalamus. Thus, these fi ndings indicated that the compensatory mechanism involves change in POMC/CART gene expression in arcuate nucleus (ARC). The POMC/CART gene expression is important for central compensatory regulation in feeding behavior.

Commentary on:“Assessing proprioception:A critical review of methods”by Han et al.

In recent years,the assessment of proprioceptive function has received increased attention in clinical and motor skill research.This is not surprising given the growing body of scientific evidence on the importance of proprioceptive information for controlling nearly all facets of human movement;from standing to performing highly skilled movement patterns

Cortical Arousal Strategies in Left-Handers during the Aural Perception and Manual Playback of Mono-and Polyphonic Rhythmical Patterns

The actual purpose of this study is to establish the cortical arousal strategies （according to the power of the EEG （electroencephalogram） a-oscillations） during the aural perception as well as manual playback of mono- and polyphonic rhythmical patterns in men with left profile. The study involved 35 men from 19 to 21 years old with the left profile of the manual and aural asymmetries. EEG was recorded in the functional status of rest： during the aural perception and playback of mono- and polyphonic rhythmical patterns with the left and right hand fingers. The monophony in the rhythmical pattern sounding relative to monophonic patterns is followed by more expressed and widespread cortical processes of the EEG a-oscillation depression. Given patterns indicate a greater intensity of ascending nonspecific arousal strategies of data processing by men on conditions of the sound and harmonious complications of the pattern structure. The aural perception and playback of rhythmical patterns with both hands were accompanied by the increased significance of arousal processes in the right hemisphere. This may be due to the dominant role of the hemisphere during the formation of the innervation impacts on the left-hander＇s neuro-motor apparatus. More differentiated changes in the cerebral cortex were installed during the left hand activation.

Effects of spatial distribution of soil parameters on soil moisture retrieval from passive microwave remote sensing

In this paper,we studied the effect of spatial distribution of soil parameters on passive soil moisture retrieval at pixel scale.First,we evaluated the forward microwave emission model and soil moisture retrieval algorithm accuracy through the observa-tion of field experiments.Then,we used soil parameters in different spatial distribution patterns,including random,normal,and uniform distribution,to determine the different levels of heterogeneity on soil moisture retrieval,in order to seek the rela-tionship between heterogeneity and soil moisture retrieval error.Finally,we conducted a controlled heterogeneity effect ex-periment measurements using a Truck-mounted Multi-frequency Radiometer(TMMR) to validate our simulation results.This work has proved that the soil moisture retrieval algorithm had a high accuracy(RMSE=0.049 cm3 cm 3) and can satisfy the need of this research.The simulation brightness temperatures match well with observations,with RMSE=9.89 K.At passive microwave remote sensing pixel scale,soil parameters with different spatial distribution patterns could have different levels of error on soil moisture estimation.Overall,we found that soil moisture with a random distribution in a satellite pixel scale can cause the largest error,with a normal distribution being the second,and a uniform distribution the least due to the smallest het-erogeneity.

Global Dynamics for an HIV Infection Model with Crowley-Martin Functional Response and Two Distributed Delays

In this paper, an HIV dynamics model with two distributed intracellular delays incorporating Crowley-Martin functional response infection rate is investigated. The authors take into account multiple stage disease transmission and the latently infected cells（not yet producing virus） in our system. The authors consider nonnegativity, boundedness of solutions, and global asymptotic stability of the system. By constructing suitable Lyapunov functionals and using the Lyapunov-La Salle invariance principle, the authors prove the global stability of the infected（endemic） equilibrium and the diseasefree equilibrium for time delays. The authors have proven that if the basic reproduction number R_0 is less than unity, then the disease-free equilibrium is globally asymptotically stable, and if R_0 is greater than unity, then the infected equilibrium is globally asymptotically stable. The results obtained show that the global dynamic behaviors of the model are completely determined by the basic reproduction number R_0 and that the time delay does not affect the global asymptotic properties of the model.

创新教学,收获精彩——高中语文教学创新摭探

在新课改进行地如火如荼的背景下,高中语文教学应当紧跟时代的步伐,改变过时的教学理念、摒弃传统的教学模式。通过不断地创新,彰显语文教学魅力,激发学生学习兴趣,提升学生语文素养。基于此,本文立足于新课改时代背景,就高中语文教学创新进行如下摭探。