我国股票市场的异常现象分析

金融市场是一个复杂的体系,早在19世纪人们就开始了对金融市场价格、风险等问题的研究和预测并建立了相关的基础理论,但目前研究证明完全有效市场假设理论已不能解释金融市场的实际行为。本文借助于经济物理学的消除趋势波动分析法和方差分析法,以上证综合指数和深证综合指数的日数据和15分钟高频数据为基础,探讨我国股票市场存在的异常现象。结果表明,我国股票市场存在持久性和日内＂U＂形波动特征,进一步证明我国股票市场是一个非完全有效市场。     

利用课堂意外生成打造高效物理课堂

物理课堂教学动态生成是新课程倡导师生多向、开放和动态的对话、交流过程.物理教师可以通过抓住课堂意外、超越课本生成、在问题中生成、利用错误资源生成等方式,预设文本静态弹性,关注课堂非预设性生成,有效提高课堂实效.     

多媒体辅助物理教学中存在问题的探究

在肯定多媒体在物理教学中的优点基础上,对多媒体运用于物理课堂教学,特别是基础物理课堂教学中出现的不足和存在的问题进行讨论.     

摭谈卓越工程师的计算机科学素养培养

根据新一轮《计算机基础课程教学基本要求》,从我国公民的科学素养调查情况出发,以省属本科高校福建工程学院为例,分析了计算机基础教育现状,提出构建"一主两翼"的课程体系和"三层次四领域"知识体系。提倡将计算思维、信息素养等理念植入计算机教育课堂,进行有针对性的教学模式改进,以培养和提升卓越工程师的计算机科学素养。     

计算情报初探

[目的/意义]面向发展情报,未来的情报工作可能面临解决多维目标问题,以及实现每个目标的多重发展路径的选取问题,传统的情报方法在解决多情报并行问题上无法满足大规模人力需求,需要借助人工智能、脑科学、认知技术等手段,通过计算机来计算情报、辅助决策。文章从量化计算对科学研究的重要作用入手,分析计算情报的重要意义。[方法/过程]将计算情报界定为以计算机的"运算能力(大数据)"为经,"计算思维(人工智能)"为纬进行情报的量化分析和判断,针对计算情报面临的挑战与机遇进行了分析;提出实现计算情报的两个前提和一个转化基本思路,两个前提是大数据环境和人工智能技术,一个转化是将情报活动中的过程性的主观决策转化为客观概率上的不确定性,并通过"证据链模型"探索计算情报的实现途径。[结果/结论]认为当前环境下,计算情报是可能实现的。计算情报的实现不仅需要情报与信息技术、人工智能技术融合,还需要应用以数学理论为代表的基础科学理论。     

冰冻圈物理研究的新视野

冰是冰冻圈核心物质,但不同冰冻圈要素因冰的含量及其他物质组成有所不同,物理性质及各种物理过程存在明显差异。经过20世纪中后期对冰的物理性质的大量实验研究和冰冻圈主要要素物理特征的广泛调查,冰的物理性质和冰冻圈主要要素物理特征的基本概念得以明确。随着冰冻圈科学体系的建立和服务于社会经济发展的需要,冰冻圈物理研究在3个方面要着力发展:(1)提高冰和冰冻圈要素物理性质的定量刻画精度,为过程模拟、冰冻圈灾害防治和冰冻圈服务提供关键参数支持;(2)加强冰冻圈主要要素综合物理过程的模拟研究,特别是要开展实体和相似性模拟实验;(3)推进冰冻圈多模式及其与其他圈层模式的耦合研究。     

线上与线下的融合——MOOC环境下大学物理课程的教学实践

本文主要简单地介绍了线上教学和线下教学各自的优劣之处,通过对现阶段大学物理课程教学中存在的问题进行分析,来探讨MOOC环境下大学物理课程线上教学与线下教学的有效融合,以改变传统教学模式,充分应用现代计算机互联网技术,适应新的MOOC教学环境,激发学生的学习兴趣,提高大学物理课程教学质量,实现教学效益最大化。     

Development of a space cold atom clock

Atomic clocks with cold atoms play important roles in the field of fundamental physics as well as primary frequency standards. Operating such cold atom clocks in space paves the way for further exploration in fundamental physics, for example dark matter and general relativity. We developed a space cold atom clock (SCAC), which was launched into orbit with the Space Lab TG-2 in 2016. Before it deorbited with TG-2 in 2019, the SCAC had been working continuously for almost 3 years. During the period in orbit, many scientific experiments and engineering tests were performed. In this article, we summarize the principle, development and in-orbit results. These works provide the basis for construction of a space-borne time-frequency system in deep space.     

浅谈信息技术在物理教学中的应用

信息技术的广泛应用对物理教学产生了较大的影响,但现实中仍存在着观念滞后、能力不足、资源缺乏的问题。为此,应加强对传统教学模式加信息技术的新型教学模式的研究,大力开发多媒体教材,共建教育资源库和不断增强教学的趣味性。     

New physics searches at the BESIII experiment

The standard model (SM) of particle physics, comprised of the unified electroweak and quantum chromodynamic theories, accurately explains almost all experimental results related to the micro-world, and has made a number of predictions for previously unseen particles, most notably the Higgs scalar boson, that were subsequently discovered. As a result, the SM is currently universally accepted as the theory of the fundamental particles and their interactions. However, in spite of its numerous successes, the SM has a number of apparent shortcomings, including: many free parameters that must be supplied by experimental measurements; no mechanism to produce the dominance of matter over antimatter in the universe; and no explanations for gravity, the dark matter in the universe, neutrino masses, the number of particle generations, etc. Because of these shortcomings, there is considerable incentive to search for evidence for new, non-SM physics phenomena that might provide important clues about what a new, beyond the SM theory (BSM) might look like. Although the center-of-mass energies that BESIII can access are far below the energy frontier, searches for new, BSM physics are an important component of its research program. This report reviews some of the highlights from BESIII’s searches for signs of new, BSM physics by: measuring rates for processes that the SM predicts to be forbidden or very rare; searching for non-SM particles such as dark photons; performing precision tests of SM predictions; and looking for violations of the discrete symmetries C and CP in processes for which the SM expectations are immeasurably small.