渤中28－1（BZ28－1）油田N6H水平井动态分析

本文以渤中２８－１（ＢＺ２８－１）油田Ｎ６Ｈ水平井为例，从多方面对该井的动态和产能变化进行了系统分析，所用的方法对水平井动态分析有一定的指导意义。     

氨合成塔出口氨含量偏低原因分析及对策

阐述UHDE合成塔运行现状 ,分析氨净值达不到设计值的原因 ,提出相应的解决措施     

关于正整数的k次根的整部

对于给定的自然数m，令口α（m)为m的是的次根的整部。即：α(m)=[m^1/k]。研究了α(m)的渐近性质，并给出了一个有趣的渐近公式。     

Application of the blind source separation method to feature extraction of machine sound signals

As the result of vibration emission in air, a machine sound signal carries important information about the working condition of machinery. But in practice, the sound signal is typically received with a very low signal-to-noise ratio. To obtain features of the original sound signal, uncorrelated sound signals must be removed and the wavelet coefficients related to fault condition must be retrieved. In this paper, the blind source separation technique is used to recover the wavelet coefficients of a monitored source from complex observed signals. Since in the proposed blind source separation (BSS) algorithms it is generally assumed that the number of sources is known, the Gerschgorin disk estimator method is introduced to determine the number of sound sources before applying the BSS method. This method can estimate the number of sound sources under non-Gaussian and non-white noise conditions. Then, the partial singular value analysis method is used to select these significant observations for BSS analysis. This method ensures that signals are separated with the smallest distortion. Afterwards, the time-frequency separation algorithm, converted to a suitable BSS algorithm for the separation of a non-stationary signal, is introduced. The transfer channel between observations and sources and the wavelet coefficients of the source signals can be blindly identified via this algorithm. The reconstructed wavelet coefficients can be used for diagnosis. Finally, the separation results obtained from the observed signals recorded in a semi-anechoic chamber demonstrate the effectiveness of the presented methods .     

无锡市运河实验中学改扩建设计随感

通过对无锡市运河实验中学改扩建项目的回顾,阐述如何发掘原有校园空间环境的价值,并且通过借鉴中国古典园林的设计手法,使得老校园焕发出新生机。     

略论闽台文化的渊源及其特有的伦理价值观

闽台文化是中华文化的一个组成部分。其根源是中原之河洛文化。特殊的地理位置、特殊的生活环境使闽台文化中的伦理价值颇具特色。闽台文化对中华文化的传承与补充反映了海峡两岸的亲密关系。     

Comparative Judgments as an Alternative to Ratings: Identifying the Scale Origin.

Although comparative judgment methods have a number of distinct advantages over ratings, they share one common problem: On the basis of comparative judgments, it is not possible to recover the origin of item evaluations. One item may be judged more positively than another, but this result does not allow any conclusions about whether either of the items are attractive or unattractive. This article discusses the implications of this limitation for the interpretation of individual differences in comparative judgments. It also presents 3 different methods that may allow determination of the scale origin using a nested model comparison approach. An application illustrates the proposed approach as well as the benefits of determining the scale origin in understanding value judgments. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Runout analysis in fatigue investigation

Those individual tests in a series of experiments that are not completed or must be suspended are known as “censored points,” or “runouts”. Inclusion of runouts in data analysis can be problematic, and such ad hoc approaches as ignoring the runout observation or treating it as a failure can significantly affect estimation. The methodology offered here alleviates the handling of runouts and censored data by using the maximum likelihood estimation (MLE) method to incorporate the censored data properly. The methodology is illustrated with an example problem using actual data and the affects of ad hoc approaches are illustrated.     

大学教学价值取向的生存论反思

在生存论看来，以实存论为基底的大学教学价值取向，遗忘了追问人的生存意义。实际上，生存意义是在欲、技、道的游戏中生成的。大学教学价值向“寻求意义”的转向，实质上是“理智培育”、“技术培训”、“情感培养”三类传统价值取向在当代的共同表现形式．而非彼此对立。     

Prediction of higher heating values for saturated fatty acids from their physical properties

Higher heating values (HHVs) of fatty acids (C₄–C₁₈) were measured and correlated using linear least square regression analysis. Equations were developed for the estimation of the HHVs of saturated fatty acids from their molecular weight (Mw), density (DN) and carbon number (CN). These equations are HHV = 0.0518 Mw + 29.76, HHV = −93.4 DN + 122.67 and HHV = 0.7271 CN + 31.419 with R² values of 0.9895, 0.9798, and 0.9895, respectively. The correlations may be used for HHV estimation of mixtures of fatty acids developed from vegetable oils.