Lanthanide Shift Reagents XIV Equilibrium Binding Constants for Europium Shift Reagent with Alkyl and Aryl Esters

Methods have been developed for measuring the equilibrium binding constants (K) for lanthanide shift reagents with donor substrates. Although Infrared Spectroscopy proved useful¹ for determining the binding of substituted anilines to the tris-tetramethylheptanedionate of Ytterbium, it was found that NMR was more sensitive and applicable to a wider range of substrates than simple alcohols and amines^2,3. The NMR procedure of progressive     

The Recoilness Emission and Reception of γ-Gravitons in Laboratory and Cosmic Conditions

The theoretical consideration of the sponteneous emission of γ-gravitons by excited nuclei lead us to the conclusion about the principle possibility of γ-graviton detection from cosmic and laboratory sources. The γ-graviton astronomy and geophysics can give new information about cosmic and geophysical processes.     

On the Hydrogen Bonding of Whewellite

Abstract

Infrared spectra of whewellite (calcium oxalate monohydrate) have been recorded at 300 and 90°K in the 4000–2000 cm^?1 range in order to investigate the factors determining the band breadth and structure. On the basis of the HOD and bending D₂O fundamentals details of the whewellite crystal structure concerning the symmetry of water molecules and the strength and symmetry of the hydrogen bonds are also discussed.     

Error estimation for non-uniform sampling in shift invariant space

To reconstruct a function from its sampling value is not always exact, error may arise due to a lot of reasons, therefore error estimation is useful in reconstruction. For non-uniform sampling in shift invariant space, three kinds of errors of the reconstruction formula are discussed in this article. For every kind of error, we give an estimation. We find the accuracy of the reconstruction formula mainly depends on the decay property of the generator and the sampling function.     

基于改进Mean Shift算法的实时视频目标跟踪

设计了一套嵌入式平台上实现的视频目标跟踪系统.该系统采用CMOS图像传感器获取视频信号,利用Z228多媒体芯片自带的ARM9处理器完成视频信号的控制,并通过MPEG-4硬件编码器实现视频信号的压缩.用Mean Shift算法跟踪运动目标,针对其收敛的局限性设置多个搜索点来提高其跟踪效果.通过减少采样点和标记已计算点来提高代码运行速度,增强了跟踪的实时性.实验结果表明,本系统能以27 fps速率连续稳定地实现视频目标的跟踪.     

介质阻挡放电中体放电和沿面放电的光谱线形研究

在放电间隙较大的介质阻挡放电中,利用高速照相机,同时观察到了体放电(VD)和沿面放电(SD)。采用光谱法,研究了VD和SD的光谱线形随放电参数的变化。在氩气介质阻挡放电中,测量了VD和SD的Ar Ⅰ(2P₂→1S₅)谱线展宽和频移随气压及放电间隙的变化。结果发现：SD的展宽和频移均比VD的大,说明SD的电子密度高于VD的电子密度;随着压强从40 kPa增大到60 kPa,VD和SD的谱线展宽及频移均增加,表明它们的电子密度均随压强的增大而升高;随着d值从3.8 mm增大到4.4 mm,VD和SD的谱线展宽也增加,反映它们的电子密度均随d值的增大而增加。     

A shift scheduling model for employees with different seniority levels and an application in healthcare

This paper addresses the problem of scheduling medical residents that arises in different clinical settings of a hospital. The residents are grouped according to different seniority levels that are specified by the number of years spent in residency training. It is required from the residents to participate in the delivery of patient care services directly by working weekday and weekend day shifts in addition to their regular daytime work. A monthly shift schedule is prepared to determine the shift duties of each resident considering shift coverage requirements, seniority-based workload rules, and resident work preferences. Due to the large number of constraints often conflicting, a multi-objective programming model has been proposed to automate the schedule generation process. The model is implemented on a real case in the pulmonary unit of a local hospital for a 6-month period using sequential and weighted methods. The results indicate that high quality solutions can be obtained within a few seconds compared to the manually prepared schedules expending considerable effort and time. It is also shown that the employed weighting procedure based on seniority levels performs much better compared to the preemptive method in terms of computational burden.     

JPSTH两种修正方法的比较与分析

联合刺激后时间直方图（JPSTH）能够反映神经元之间相关性的动态改变,是神经元信号处理中常用的处理方法。原始联合刺激后直方图（rawJPSTH）只是简单描述了两个锋电位序列之间的相关性。归一化联合刺激后直方图（Normalized JPSTH）和移位修正后联合刺激后直方图是对原始JPSTH的修正。本文用多电极记录海马神经元网络信号,对JPSTH的两种修正方法进行了较为深入的比较和分析。