大学英语课堂中的学生口头互动现状探究

采用课堂观察和问卷方式,对大学生参与英语课堂的现状进行了调查分析.课堂观察显示,无论教学用语还是教学活动,教师都在尽可能鼓励和引导学生参与课堂口头互动.学生方面,虽然有7成承认听说是最想提高的技能,但对于老师的各种互动问题,只有少数同学主动参与,大部分学生处于被动局面.对教师的调查则显示,教师认可并创造互动课堂.但学生的参与却不尽如人意.因此,大学生不愿意参与课堂口头互动的状况仍没有得到改善.     

SAR的海洋遥感探测技术综述

从研究SAR的海洋遥感探测重要性和基本特点出发,概述了SAR系统的海洋遥感探测技术所涉及的主要研究内容,针对海洋环境要素分布的随机性和时变性,研究了海面微波散射特性和SAR的海面成像机理,给出了研究结果;分析了SAR系统主要特点,提出研究包括系统的宽测绘带特性和雷达的弱信号获取、海面精确成像算法和时空相关性等方面;同时探讨了海洋目标检测的技术途径,以满足SAR系统海洋观测应用的需要.     

Tests of serial independence based on Kendall's process

The authors propose new rank statistics for testing the white noise hypothesis in a time series. These statistics are Cramér‐von Mises and Kolmogorov‐Smirnov functionals of an empirical distribution function whose mean is related to a serial version of Kendall's tau through a linear transform. The authors determine the asymptotic behaviour of the underlying serial process and the large‐sample distribution of the proposed statistics under the null hypothesis of white noise. They also present simulation results showing the power of their tests.     

岩爆形成机制的细观力学实验分析

在扫描电镜下，对三种类型岩石进行单轴压缩的细观力学实验，即时观察岩石变形破坏全过程．根据实验结果，可以较好的解释岩爆形成的实质．     

Estimation for hidden Markov random fields

A finite state Markov random field is noisily observed via a second finite state process. The parameters of the model are estimated, as well as the most likely signal given the observations.     

高斯与观测误差分布的发现

在数理统计的发展史上,最重要的事件也许就是观测误差分布的发现。统计学家们在寻找观测误差分布的过程中,创造了许多有用的统计理论和方法,不过观测误差分布发现的优先权最终属于伟大的德国科学家高斯。文章主要介绍了高斯发现观测误差分布的思考过程,并期望读者能从高斯天才的思想中获得有益的启迪。     

Bayesian estimation of P (Y<X) from Burr-type X model containing spurious observations

We consider the problem of estimating R=P(Y<X) when X and Y are independent Burr-type X random variables. We assume that the sample from each population contains one spurious observation. Bayes estimates are derived for exchangeable and identifiable cases. Monte Carlo simulation is carried out to compare the bias and the expected loss of R.     

When images matter: Internet child pornography, forms of observation and an ethics of the virtual

The arrest of Pete Townshend, lead guitarist for The Who, for downloading and possessing Internet child pornography and the publicity surrounding the case provides an initial point of discussion concerning the emergence of an ethics of the image that is not predicated on the actual evidential status of that image but on more virtual forms of observation. The discussion in this article focuses on three substantive aspects of this event - legislation in the UK and the US, expert psychological discourse, and public discussion in the UK press - in order to present a particular and situated rendering of forms of virtual observation. The context to this discussion concerns the notion that digital imaging technology presages a need for new legislation, law enforcement and social analytical frameworks for understanding and tackling the production, distribution and consumption of images of child sexual abuse.     

反思型教学与英语教师专业培训

反思型教学倡导教师从一个较客观的角度来观察、分析和评价自身的教学行为,深入理解与反思行为过程及其背后的理论支撑,自我总结,以期在未来改进提高教学行为。这种属于教师行为研究领域的模式,认可教师原有的知识经验,同时又鼓励其对教学设计、实施过程,课堂教学对象行为和教学评估等多方面进行反思,进而促进教师专业发展。     

对我国行政听证主体制度完善之探讨

完整的行政听证主体制度的建立,有利于实现行政行为民主、公开、公正的要求,因此以行政听证主体为对象,通过与各国听证主体制度的比较,解析我国行政听证主体制度的不足,并通过借鉴美国等国家的做法及挖掘我国地方立法实践运作的创新举措来探讨我国行政听证主体制度的完善。