Evaluation of an attached sunspace without sun protection: How feasible is this approach in mediterranean summer conditions?

The use of attached sunspaces has become popular throughout Europe both for energy and for architectural reasons. This applies particularly in Southern Europe and in the Mediterranean, where sunspaces are habitable over long periods of the year. The danger of overheating during summer is, however, not to be underestimated, as the results of a long-term measurement of such a sunspace shows. The indoor climate conditions monitored seem to confirm that, without a sun-protection scheme, satisfactory comfort conditions are difficult to establish. Still, with appropriate ventilation the resulting cooling loads can be reduced to acceptable levels, which, when considering the heating period, can lead to an overall positive result.     

孙中山留美生涯对其辛亥革命理论的影响

孙中山先生的革命理论(三民主义)指导辛亥革命推翻了清王朝的专制统治,结束了两千多年的封建帝制政体,加速了中国近代化的进程。孙中山革命理论的提出与其多年的留美生活密切相关:有感美国夏威夷的反抗斗争首倡民族主义;以美国的民主共和政体为蓝本绘制民权主义;借鉴美国亨利.乔治的单一税规划民生主义。     

孙中山政治思想的几个特点及其意义

孙中山政治思想的主要特征有：把宪政作为民主政治的基础;真正的民权就是要扩大人民直接参与政治的权力;在政府与社会的关系上,应当也可以确立强政府强社会的格局;民主政治的实现需要具体的法律、制度和程序,要从细微处入手;中国政治发展应当选择渐进式的发展路径等。结合民主政治发展的有关理论与实践,对其历史与现实意义做了分析。认为孙中山的民主政治理论,对于我们今天的政治文明建设仍然具有重要的启迪意义。     

Tracking down some ancient baboons.

In this article the author recounts his search to find an original picture of an ancient Egyptian Sun Sanctuary nearby the temple Abu Simbel. The author learned that the sun sanctuary had been dismantled in 1915, the baboons transported to the Egyptian Museum in Cairo for safekeeping. Thus if he were to have a proper photograph of the baboons in their original setting, it would have to have been taken before 1915. After searching a seven volume index to every site in Egypt, Dr. Spanel reported that such a picture can be found in Gaston Maspero’s Rapports relatifs á la consolidation des temples, published in Cairo in 1911 by the Institut fran?ais d'archéologie orientale. So, it was not long after the author sent off his third request that an express envelope arrived from Egypt, with a fine copy of the photograph and a cover letter from the director, saying that he was sending it with his compliments and best wishes. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Damage of the ocular surface from indoor suntanning—Insights from in vivo confocal microscopy

PurposeTo evaluate the ocular surface at the microstructural level of adults who habitually undertake indoor-suntanning utilising in vivo confocal microscopy.MethodsParticipants were prospectively recruited and enrolled into either а study group (n = 75) with a history UV indoor tanning, or a control group (n = 75) with no prior history of artificial tanning. The study group participated in voluntary tanning sessions performed with standard equipment and maintained their usual routine for eye protection. Slit lamp biomicroscopy and in vivo confocal microscopy were performed at baseline before undertaking a series of suntanning sessions (10 sessions of 10 min duration over a 15 day period), within three days after the last session, and four weeks after the last session. Control group participants were examined at baseline and 8 weeks later and did not participate in tanning sessions.ResultsAll participants were female with a mean age of 25 ± 4 years and 24 ± 4 years in the study and control groups, respectively. No clinically significant changes were observed in either group over time using slit lamp biomicroscopy (all p ≥ 0.05), however, statistically significant differences were observed between the study and the control group for all corneal layers imaged using confocal microscopy (all p ≤ 0.03). Characteristic cystic conjunctival lesions with dark centres and bright borders were observed in 95% of the study group before and in 100% after the suntanning sessions.ConclusionIndoor suntanning resulted in statistically significant microstructural changes in the cornea and the bulbar conjunctiva that are undetectable with slit lamp biomicroscopy.     

傲雪凌霜 学者脊梁——孙筱祥先生对当代公园和植物园建设发展的开创性、前瞻性贡献及深远国际影响

【意义】随着国家植物园和华南国家植物园于2022年相继揭牌成立,当代公园和植物园的发展历程引起了更加广泛的关注。孙筱祥先生是中国现代风景园林领域的先驱和开拓者,其风景园林作品包括花港观鱼公园、杭州植物园、北京林业大学教学植物园、北京植物园（现国家植物园）、中国科学院华南植物园（现华南国家植物园）、海南植物园、厦门市园林植物园、深圳市仙湖植物园、中国科学院西双版纳热带植物园和云南景东亚热带植物园。纵观这些作品的诞生、演变及创作时代背景,系统性地总结孙先生的理论、实践和职业生涯,对于当代公园和植物园建设发展史的研究至关重要。【评论】孙筱祥先生集教育家、园林家、花卉家、画家、建筑师和大地规划师于一身,他的风景园林作品在时代洪流中脱颖而出,成为永恒的经典和传世之作。通过对孙先生70年风景园林史料的分析和研究,从聚焦时代背景的视角,阐述他为当代建设科学与艺术、东方与西方、古典与现代、自然与人文、抽象与现实相结合的世界一流公园和植物园开辟了道路、引领了方向、奠定了基础、树立了典范。【展望】孙筱祥先生的风景园林作品,遍布中国大江南北的不同气候带,他为促进植物多样性物种保存和迁地保护、人类生存环境的可...     

万向节式太阳跟踪方法及跟踪装置

为了提高光伏发电系统的太阳方位跟踪精度,降低太阳方位跟踪装置的制造成本,提出了一种新的太阳跟踪方法及跟踪装置。该方法通过将太阳方位角及高度角的参数进行换算,得到与之对应的两个驱动转角参数,根据这新的参数驱动太阳能电池板进行万向节式的运动以跟踪太阳。新设计的跟踪装置包括太阳方位监测模块、参数计算模块、驱动装置、自方位误差测定模块以及反馈控制模块,能及时采集太阳方位参数进行换算,并且能够根据太阳能电池板方位误差修正实时联动的频率与步幅。新型太阳方位跟踪装置跟踪精度高,跟踪时间间隔小,结构简单且造价低。     

风雨音乐台

该文简要介绍了音乐台的现状特点,并从声学、视线以及排水等角度对它的设计进行了分析。     

Performance evaluation of a solarized gas turbine system integrated to a high temperature electrolyzer for hydrogen production

In this paper, the performance of a solar gas turbine (SGT) system integrated to a high temperature electrolyzer (HTE) to generate hybrid electrical power and hydrogen fuel is analyzed. The idea behind this design is to mitigate the losses in the electrical power transmission and use the enthalpy of exhaust gases released from the gas turbine (GT) to make steam for the HTE. In this context, a GT system is coupled with a solar tower including heliostat solar field and central receiver to generate electrical power. To make steam for the HTE, a flameless boiler is integrated to the SGT system applying the SGT extremely high temperature exhaust gases as the oxidizer. The results indicate that by increasing the solar receiver outlet temperature from 800 K to 1300 K, the solar share increases from 22.1% to 42.38% and the overall fuel consumption of the plant reduces from 7 kg/s to 2.7 kg/s. Furthermore, flameless mode is achievable in the boiler while the turbine inlet temperature (TIT) is maintained at the temperatures higher than 1314 K. Using constant amounts of the SGT electrical power, the HTE voltage decreases by enhancing the HTE steam temperature which result in the augmentation of the overall hydrogen production. To increase the HTE steam temperature from 950 K to 1350 K, the rate of fuel consumption in the flameless boiler increases from 0.1 m/s to 0.8 m/s; however, since the HTE hydrogen production increases from 4.24 mol/s to 16 mol/s it can be interpreted that the higher steam temperatures would be affordable. The presented hybrid system in this paper can be employed to perform more thermochemical analyses to achieve insightful understanding of the hybrid electrical power-hydrogen production systems.     

广州中山纪念堂

广州中山纪念堂是与南京中山陵齐名的中国地标性建筑物：她是吕彦直将西方先进的建筑技术和传统的中国建筑形式完美地结合为一体的又一杰作。诚然,由于吕彦直的早逝和纪念堂设计图纸.施工文件的散失,致使关于广州中山纪念堂的设计理念,向无定论。本文作者深入发掘民国档案和历史报章,在2003年出版的《广州中山纪念堂钩沉》一书中,为广州中山纪念堂建立起了一整套建筑历史档案,进而对纪念堂的构造经过和设计理念等难题展开了研究和考证。