继承与发扬民族文化的历时性反思

在面临全球化这一新的历史遭遇时,如何继承与发扬民族文化,本文通过对20世纪前后百年间文化交流的回望,以历时性的反思探讨民族文化的建设。     

Stationary flow fields prediction of variable physical domain based on proper orthogonal decomposition and kriging surrogate model

In this paper a new flow field prediction method which is independent of the governing equations, is developed to predict stationary flow fields of variable physical domain. Predicted flow fields come from linear superposition of selected basis modes generated by proper orthogonal decomposition(POD). Instead of traditional projection methods, kriging surrogate model is used to calculate the superposition coefficients through building approximate function relationships between profile geometry parameters of physical domain and these coefficients. In this context,the problem which troubles the traditional POD-projection method due to viscosity and compressibility has been avoided in the whole process. Moreover, there are no constraints for the inner product form, so two forms of simple ones are applied to improving computational efficiency and cope with variable physical domain problem. An iterative algorithm is developed to determine how many basis modes ranking front should be used in the prediction. Testing results prove the feasibility of this new method for subsonic flow field, but also prove that it is not proper for transonic flow field because of the poor predicted shock waves.     

基于BP网络的机组工作量评估方法研究

为研究机组工作量的评估问题,搭建了模拟飞行实验平台,设定了7种不同负荷的飞行任务。模拟飞行中,对被试的生理指标进行测量,并采集其主观评价值。采用BP网络进行数学建模,将生理指标测量值作为输入、NASA-TLX表法的评价值作为输出,利用输入、输出模式对对网络进行训练,并对该方法进行验证。结果表明,基于BP网络的机组工作量评估方法,较传统方法更为稳定、精确,且大大降低了被试数量。提高训练模式对的数量、简化生理指标的测量过程,并保证测量精度是该方法成功的关键。     

Diversity of Comets: Formation Zones and Dynamical Paths

The past dozen years have produced a new paradigm with regard to the source regions of comets in the early solar system. It is now widely recognized that the likely source of the Jupiter-family short-period comets (those with Tisserand parameters, T > 2 and periods, P, generally < 20 years) is the Kuiper belt in the ecliptic plane beyond Neptune. In contrast, the source of the Halley-type and long-period comets (those with T < 2 and P > 20 years) appears to be the Oort cloud. However, the comets in the Oort cloud almost certainly originated elsewhere, since accretion is very inefficient at such large heliocentric distances. New dynamical studies now suggest that the source of the Oort cloud comets is the entire giant planets region from Jupiter to Neptune, rather than primarily the Uranus-Neptune region, as previously thought. Some fraction of the Oort cloud population may even be asteroidal bodies formed inside the orbit of Jupiter. These comets and asteroids underwent a complex dynamical random walk among the giant planets before they were ejected to distant orbits in the Oort cloud, with possible interesting consequences for their thermal and collisional histories. Observational evidence for diversity in cometary compositions is limited, at best. This revised version was published online in June 2006 with corrections to the Cover Date.     

高校体育多媒体教学平台系统的建设研究

本文从当前高校体育教学的周期短、学时少、教学方法单一的特点出发,充分的利用现代计算机网路多媒体技术,设计一套符合高校体育教育的多媒体教学平台系统,以满足学生课余时间的自主学习,增加教学的延伸性、娱乐性,为高校体育教育目标的实现提供保障。     

Integrated Safety Culture Model and Application

A new safety culture model is constructed and is applied to analyze the correlations between safety culture and SMS. On the basis of previous typical definitions, models and theories of safety culture, an in-depth analysis on safety culture＇s structure, composing elements and their correlations was conducted. A new definition of safety culture was proposed from the perspective of sub-culture. 7 types of safety sub-culture, which are safety priority culture, standardizing culture, flexible culture, learning culture, teamwork culture, reporting culture and justice culture were defined later. Then integrated safety culture model （ISCM） was put forward based on the definition. The model divided safety culture into intrinsic latency level and extrinsic indication level and explained the potential relationship between safety sub-culture and all safety culture dimensions. Finally in the analyzing of safety culture and SMS, it concluded that positive safety culture is the basis of im plementing SMS effectively and an advanced SMS will improve safety culture from all around.     

改进体育课堂教学质量的几点思考

本文对现在体育教学方法提出了几点改进意见。目的是为了提高体育课的教学质量，增强学生的身体健康。     

论开封市夜经济的经营与管理

开封市的夜经济很有特色,历史悠久,内容丰富.它不仅成为人们娱乐休闲的一个社交场所,也为城市创造了源源不断的财富,同时也存在许多问题.这就需要政府的大力引导,采取相应的措施进一步规范夜晚市场,提升夜晚消费的档次,从文化上强化"夜开封"的魅力.     

刚体转动惯量的测量及数据处理

本文采用一元线性回归法进行刚体转动惯量实验的数据处理,对通常在测量中运用的简化条件作了分析,从而提高了实验课的教学水平,并使该实验具有实用价值。     

微藻反应器用于水气净化与产氧的功能验证

将微藻和电去离子技术引入密闭生态系统,设计单元反应器旨在验证其在空气再生、水净化和潜在食物的生产。在反应器中对尿液进行消解和NH4＋硝化转化得到超过90%NH4＋-N硝化为NO-3-N-的培养液适宜于螺旋藻养殖并获得高质量的微藻生物量;此时,CO2的平均吸收速率VCO2=458.6 mL/m3·min、O2产生速率VO2=616.5 mL/m3·min,即螺旋藻的同化系数VCO2/VO2≈0.74,接近人的呼吸系数VCO2/VO2=0.86;EDI法水净化率97%可直接回用。结果表明：该体系能实现CO2吸收、O2释放和螺旋藻生物量的生产,同时将水净化。