Peking University Launches a New Five-Year Project for the Development of Kunqu Opera

China＇s Kunqu Opera was included in the UNESCO List of Masterpieces of Oral and Intangible Cultural Heritage in 2001. As a traditional form of Chinese theatre, Kunqu Opera has not been widely known by overseas audiences. When European opera is presented worldwide and attracting numerous audiences, Chinese Kunqu Opera, enjoying equal artistic value, should also access Jbreign audiences.     

时间序列法在我国石油需求预测模型中的应用

本文首先介绍了时间序列法以及时间序列的种类,通过分析得出我国石油需求序列是有确定趋势的非平稳时间序列,并选择最小二乘法分两步建立模型。然后详细介绍了建模过程,并对模型预测精度和稳定性作了评价,结果表明所建立的模型是较好的预测模型。最后用该模型对我国2006年—2020年的石油需求进行了预测。     

Precision measurement of the Newtonian gravitational constant

The Newtonian gravitational constant G, which is one of the most important fundamental physical constants in nature, plays a significant role in the fields of theoretical physics, geophysics, astrophysics and astronomy. Although G was the first physical constant to be introduced in the history of science, it is considered to be one of the most difficult to measure accurately so far. Over the past two decades, eleven precision measurements of the gravitational constant have been performed, and the latest recommended value for G published by the Committee on Data for Science and Technology (CODATA) is (6.674 08 ± 0.000 31) × 10⁻¹¹ m³ kg⁻¹ s⁻² with a relative uncertainty of 47 parts per million. This uncertainty is the smallest compared with previous CODATA recommended values of G; however, it remains a relatively large uncertainty among other fundamental physical constants. In this paper we briefly review the history of the G measurement, and introduce eleven values of G adopted in CODATA 2014 after 2000 and our latest two values published in 2018 using two independent methods.     

Wearable skin-like optoelectronic systems with suppression of motion artifacts for cuff-less continuous blood pressure monitor

According to the statistics of the World Health Organization, an estimated 17.9 million people die from cardiovascular diseases each year, representing 31% of all global deaths. Continuous non-invasive arterial pressure (CNAP) is essential for the management of cardiovascular diseases. However, it is difficult to achieve long-term CNAP monitoring with the daily use of current devices due to irritation of the skin as well as the lack of motion artifacts suppression. Here, we report a high-performance skin-like optoelectronic system integrated with ultra-thin flexible circuits to monitor CNAP. We introduce a theoretical model via the virtual work principle for predicting the precise blood pressure and suppressing motion artifacts, and propose optical difference in the frequency domain for stable optical measurements in terms of skin-like devices. We compare the results with the blood pressure acquired by invasive (intra-arterial) blood pressure monitoring for >1500 min in total on 44 subjects in an intensive care unit. The maximum absolute errors of diastolic and systolic blood pressure were ±7/±10 mm Hg, respectively, in immobilized, and ±10/±14 mm Hg, respectively, in walking scenarios. These strategies provide advanced blood pressure monitoring techniques, which would directly address an unmet clinical need or daily use for a highly vulnerable population.     

我国东南沿海地区农民工体育锻炼的特征研究

采用文献资料法、问卷调查法、数理统计法、逻辑分析法,对我国东南沿海地区14个城市农民工参加体育锻炼的现状进行调查,总结其特点,进而提出对策建议。     

中州武术文化研究

在中华文化大环境下孕育的中国武术，具有明显的地域性和民族特点。以中州武术为研究对象，以区域文化为视角，借鉴人类学、民俗学、历史学、社会学等诸多学科的研究方法及相关研究成果，从文化空间特征及其联系的角度对中州武术文化形态进行系统研究，认为中州武术丰厚多样，其形成和发展是与中州地域的特定地理环境、政治和经济的影响以及社会习武风尚的作用密切相关的；中州武术文化的主体性、兼容性、辐射性和创新性构成了中州武术文化最为明显的地域文化特征；中州武术客体文化呈现出多元的武术文化模式．     

八段锦对女大学生身体形态、机能和素质的影响

运用文献资料法、数理统计法对陕西师范大学非体育专业的女生共60人进行调查与分析。期间对八段锦练习者进行18周,每周5次(周一~周五),每次1h的练习。结果显示:八段锦习练者的身体形态、身体机能、身体素质在锻炼前后各项指标呈显著差异(P0.05)或者非常显著差异(P0.01)。因此,八段锦锻炼对女大学生的身体形态、机能和素质有积极的影响。     

天津市青少年生活方式现状调查研究

采用文献资料法、问卷调查法和数理统计法对天津市青少年生活方式现状进行研究。研究结果表明：天津市青少年青少年生活方式与健康总体情况良好,青少年生活方式与健康存在正相关关系,但存在运动锻炼不足的问题,不同性别、学校性质、年级交互作用下青少年生活方式存在着一定差异。     

规划视角下的奥运之城

运用文献资料研究、调查等方法,从规划的视角对奥运会举办城市进行了分析,梳理出了自1896年现代奥运会以来的历届奥运会举办城市的规划理论,提出了建筑主义、功能主义、系统理论、人本主义、后现代主义、可持续发展理论下举办城市规划思想体系.同时,以理论与实践作为评判标准,提出在理论方面,城市规划理论表现出了极强的科学性、继承性以及可操作性;在实践层面,组织者能否找到规划理论与城市特点的契合点是规划实施的关键.     

新农村建设中泰安市农村体育开展现状研究

运用文献资料法、问卷调查法和数理统计法等方法,研究了新农村建设中泰安市农村体育开展情况。在新农村建设影响下,虽然泰安市参加体育的人数明显增加,但体育人口的比例还较低。