调频广播中预加重和去加重问题的讨论

通过对调频广播系统噪声分布情况的分析,证明了在调频通讯系统中采取预加重和去加重的措施以改善信号传输质量的原理。     

庞迪我、孙元化《日晷图法》初探--兼论牛津本《天问略》中的三种晷仪

文本和技术两方面的细致比较表明,庞迪我和孙元化的《日晷图法》与陆仲玉日晷著作抄本的第一部分以及汤若望和朱確的同名著作内容基本相同,可以认为它们均出自庞迪我和孙元化的手笔.另外,徐朝俊的同名著作与庞、孙二人著作之间也存在明显的联系.     

Spinoza on the resistance of bodies

Commentators often claim that the bodies of Spinoza’s physics resist the changes they undergo. But it’s not always clear what they mean when they say this, or whether they are entitled to say it. This article clarifies what it might mean to for Spinoza’s bodies to resist change, and examines the evidence for such a view. In the first half, the author argues that there is some limited evidence for such a view, but not nearly as much as people think. In the second half, the author proposes looking for a mental analogue to collision in the realm of ideas and argues that adequacy amounts to a meaningful concept of resistance in Spinoza, albeit one that is incomplete.     

门捷列夫的“旷缺”与中国公使的感叹

1869年门捷列夫完成了世界上第一张化学元素周期表,除了把当时所知的全部63种元素按原子量大小分组(族)排列外,还在表中留下一些空位,预言了与硼、铝、硅类似的元素的存在及其性质。随后的20多年内,这些空位相继被新发现的元素填补。1877年中国首任驻英公使郭嵩焘听到了门捷列夫的预言与元素镓的发现这一故事,联想到发现海王星的经过,由衷感叹西方科学的精致与功效。     

地理教学在素质教育中的地位和作用

文章讨论了素质教育的基本概念 .认为素质教育包含三个层次 ,即基本素质教育、创新素质教育和人类生存与可持续发展素质教育 .论述了地理教学在不同层次素质教育的地位和作用 .认为人类生存与发展教育是素质教育的最高境界 ;地理教学中的可持续发展理论是人类生存与发展素质教育的主要内容 ;地理教学是人类生存与发展素质教育的主要手段和途径     

Early eighteenth-century Newtonianism: the Huguenot contribution

John Theophilus Desaguliers’s allegorical poem The Newtonian system of the world, the best model of government (1728) crystallizes the contribution of several important French Protestant exiles to the construction of early Newtonianism. In the context of diverging interpretations of Newton’s scientific achievement in terms of natural religion, writers such as Des Maizeaux, Coste, Le Clerc and others actively disseminated a version of Newtonianism which was close to Newton’s own intention. Through public experiments, translations, correspondence, reviews and books, they managed to convey a vision of Newtonian science which coincided with their propaganda of English liberties in Church and State. Therefore their effort on behalf of Newtonianism can be interpreted as part of a wider strategy of assimilation into English society at a time when most exiled Huguenots had given up hope of ever recreating a French Reformed Church at home.     

The influence of Spinoza’s concept of infinity on Cantor’s set theory

Georg Cantor, the founder of set theory, cared much about a philosophical foundation for his theory of infinite numbers. To that end, he studied intensively the works of Baruch de Spinoza. In the paper, we survey the influence of Spinozean thoughts onto Cantor’s; we discuss Spinoza’s philosophy of infinity, as it is contained in his Ethics; and we attempt to draw a parallel between Spinoza’s and Cantor’s ontologies. Our conclusion is that the study of Spinoza provides deepening insights into Cantor’s philosophical theory, whilst Cantor can not be called a ‘Spinozist’ in any stricter sense of that word.