Aristotle, Copernicus, Bruno: centrality, the principle of movement and the extension of the Universe

This paper¹ studies the different conceptions of both centrality and the principle or starting point of motion in the Universe held by Aristotle and later on by Copernicanism until Kepler and Bruno. According to Aristotle, the true centre of the Universe is the sphere of the fixed stars. This is also the starting point of motion. From this point of view, the diurnal motion is the fundamental one. Our analysis gives pride of place to De caelo II, 10, a chapter of Aristotle’s text which curiously allows an ‘Alpetragian’ reading of the transmission of motion.In Copernicus and the Copernicans, natural centrality is identified with the geometrical centre and, therefore, the Sun is acknowledged as the body through which the Deity acts on the world and it also plays the role of the principle and starting point of cosmic motion. This motion, however, is no longer diurnal motion, but the annual periodical motion of the planets. Within this context, we pose the question of to what extent it is possible to think that, before Kepler, there is a tacit attribution of a dynamic or motive role to the Sun by Copernicus, Rheticus, and Digges.For Bruno, since the Universe is infinite and homogeneous and the relationship of the Deity with it is one of indifferent presence everywhere, the Universe has no absolute centre, for any point is a centre. By the same token, there is no place that enjoys the prerogative of being—as being the seat of God—the motionless principle and starting point of motion.     

把物理学史引入物理教学

把物理学史引入物理教学,实践表明:有利于克服教学难点,有利于培养学生的认识能力、思维能力、分析和解决问题的能力。     

苯乙烯—马来酸酐共聚探讨

苯乙烯(S)和马来酸酐(MA)自由基引发共聚反应,生成共聚物SMA,是典型的交替共聚。本文介绍了在40t/a的苯乙烯类本体聚合装置试验生产SMA的流程,探讨了影响SMA本体引发连续共聚合工艺的因素。同时,通过对生成物SMA的性能测试,分析得出苯乙烯—马来酸酐共聚物SMA的耐热性明显高于苯乙烯单体均聚物聚苯乙烯(PS),使得苯乙烯类树脂在耐热性方面扩大了使用范围。     

Post-Normal Science, the Precautionary Principle and the Ethics of Integrity

Present laws and regulations even in democratic countries are not sufficient to prevent the grave environmental threats we face. Further, even environmental ethics, when they remain anthropocentric cannot propose a better approach. I argue that, taking in considerations the precautionary principle, and adopting the perspective of post-normal science, the ethics of integrity suggest a better way to reduce ecological threats and promote the human good globally. This revised version was published online in July 2006 with corrections to the Cover Date.     

自动控制原理课程教学改革与实践

针对自动控制原理教学中存在的问题，从应用型人才培养的角度，结合教改实践，阐述了教学改革的必要性，并从课程的地位作用出发探讨了教学内容、教学方式、教学手段、实验教学的改革方法。对自动控制原理教学质量的提高起到了有效的促进作用。     

计算机组成原理教学探讨

计算机组成原理是大学计算机专业的重要理论课程，关于该课程的教学方法，教学理念的问题一直是该课程教学活动中探讨的中心问题。笔者根据教学实践，阐述了该课程的特点，介绍了该课程教学中存在的问题，并提出了一些教学方法，以达到培养学生学习兴趣，提高教学质量的目的。     

Closing the door to cloud-cuckoo land: a reply to Šešelja and Straßer

Šešelja and Straßer’s critique fails to hit its target for two main reasons. First, the argument is not that Kuhn is a rationalist because he is a coherentist. Although Kuhn can be taken as a rationalist because of his commitment to epistemic values, coherence analysis provides a more comprehensive characterisation of cognitive process in scientific change than any of these values alone can offer. Further, we should understand Kuhn as characterising science as the best form of rationality we have outside logic, which rules out algorithmic rationality and allows non-cognitive factors to play a role in theory change. Second, Šešelja and Straßer overemphasise the importance of a priori reasoning in Kuhn, which was only an alternative to his earlier historical-empirical approach. My suggestion is that Kuhn’s neo-Kantian historical cognitivism integrates the earlier empirical and the later a-prioristic orientations. According to it, that any understanding of the world is preconditioned by some kind of mental module that is liable to change, detected as a discontinuity in the historical record of science.     

喷气式发动机的轴向净推力

应用动量原理，通过分析推算阐述了现代喷气发动机的力学方程——轴向净推力公式，使之成为经典物理与现代技术的又一结合点，这实属新的教学尝试，并丰富了大学物理的教学内容     

协同论与和谐社会

凡是符合最小作用量原理的物质及其思想都应该是和谐的。以不和谐的思想为指导,要想达到和谐社会是不可能的,因此必须进行思想范式的转换。为了达到相对终极态的和谐社会,中国必须要有总体的改革设计,并系统的实施、系统的调控与反馈、还要求操作的适时性、成果的准确性和时效性。这就意味着:政策的系统配套。否则,中国现在改革过程中产生的弊端将无法消除,还将会不断扩大,并严重影响中国的稳定发展。