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目的:制备载有血管内皮生长因子(VEGF)和万古霉素(VAN)的多层海藻酸钠(SA)-壳聚糖(CS)微球,并讨论其体外抗感染能力和稳定性。方法:采用滴注法和层层自组装技术制备多层载药微球;纸片法实验检测微球体外抗感染能力;分别采用ELISA法和紫外分光光度法测定微球中VEGF和VAN的载药量和包封率;微球经过不同条件处理后,通过SEM观察微球表面和截面形态,并分别测定不同条件处理后微球内VEGF和...
中国有着悠久的服饰文明与灿烂的服饰文化，各民族的传统元素历经千百年的洗礼流传了下来。 特别是近年来，国内外的服装品牌广泛运用中国元素，使古老的中国元素迸发出新的生命力。其中比利时品牌Dries Van Noten（德赖斯·范诺顿）是其中运用得较为成功的代表。文章选取2012~2016年Dries Van Noten设计作品中极具代表性的中国元素的图案，分析其在Dries Van Noten品牌中不...
Erratum for van Meer F et al. Developmental differences in the brain response to unhealthy food cues: an fMRI study of children and adults. Am J Clin Nutr 2016;104:1515–22
van Meer unhealthy food fMRI study
2018/11/13
Erratum for van Meer F et al. Developmental differences in the brain response to unhealthy food cues: an fMRI study of children and adults. Am J Clin Nutr 2016;104:1515–22.
Deconstructing van Fraassen's observable/unobservable dichotomy
observable unobservable dichotomy constructive empiricism microscopy calibration
2016/5/30
Van Fraassen bases his alternative to scientific realism, constructive empiricism, on a dichotomy between the observable and the unobservable. This paper argues that the implications of the dichotomy ...
Kuhn Losses Regained:Van Vleck from Spectra to Susceptibilities
Kuhn loss textbooks Van Vleck susceptibility Langevin-Debye formula spectroscopic stability space quantization Kramers dispersion formula correspondence principle Umdeutung perturbation theory
2016/5/30
We discuss the early career of John H. Van Vleck (1899-1980), one of the earliest American quantum theorists who shared the 1977 Nobel prize with his student Philip W. Anderson and Sir Nevill Mott. In...
目的：观察环保固定液（聚羟基丙烯酸、环保透明脱蜡液Van-clear单独或联合）替代传统固定液［4%（体积分数）中性缓冲甲醛、传统透明脱蜡液二甲苯］应用于荧光原位杂交（fluorescence in situ hybridization，FISH）法检测宫颈组织中人端粒酶核糖核酸组分（human telomerase RNA component，hTERC）基因扩增的差异。方法： 收集2013年3...
Dynamics of two van der Pol oscillators coupled via a bath
Nonlinear Oscillator Floquet Stability Bifurcation
2015/8/27
We investigate the existence and stability of the in-phase and out-of-phase modes for parameters ? > 0 and k > 0. To this end we use Floquet theory and numerical integration. Surprisingly, our results...
A pair of van der Pol oscillators coupled by fractional derivatives
Fractional calculus Fractional derivative Coupled oscillators Perturbation methods
2015/8/27
Weconsiderthestabilityofthein-phaseand out-of-phase modes of a pair of fractionally-coupled van der Pol oscillators:x ?? −? ? 1−x 2 ? x ? +x = ?γ D α (y −x) (1)y ?? −? ? 1ͨ...
Extrinsic versus intrinsic diameter for Riemannian filling-discs and van Kampen diagrams
Riemannian filling-discs van Kampen diagrams
2015/8/26
The diameter of a disc filling a loop in the universal covering of a Riemannian manifold M may be measured extrinsically using the distance function on the ambient space or intrinsically using the ind...
The Forced van der Pol Equation II: Canards in the Reduced System
van der Pol oscillator hybrid dynamical system
2015/8/25
This is the second in a series of papers about the dynamics of the forced van der Pol oscillator
[J. Guckenheimer, K. Hoffman, and W. Weckesser, SIAM J. Appl. Dyn. Syst., 2(2 003), pp. 1–35].
The fi...
The Forced van der Pol Equation I: The Slow Flow and Its Bifurcations
van der Pol oscillator hybrid dynamical system
2015/8/25
The forced van der Pol oscillator has been the focus of scientific scrutiny for almost a century, yet
its global bifurcation structure is still poorly understood. In this paper, we present a hybrid s...
A " RIP VAN WINKLE HYPOTHESIS " TO RESOLVE THE REALISM - ANTIREALISM DEBATE
realism antrealism no-miracles agument
2015/8/3
The intensity of debate between the realists and antirealists shows no sign of abating. Here a new hypothesis is proposed to resolve the issue. The requirement of consistency and continuity are built-...
Developmental acquisition of entrainment skills in robot swinging using van der Pol oscillators
van der Pol oscillator swinging robot entrainment skills degrees of freedom problem
2015/7/30
In this study we investigated the effects of different morphological configurations on a robot swinging task using van der Pol oscillators. The task was examined using two separate degrees of freedom ...
INVESTIGATION OF RAINFALL- RUNOFF MODELLING OF THE VAN LAKE CATCHMENT BY USING REMOTE SENSING AND GIS INTEGRATION
Remote Sensing GIS Landsat TM Runoff depth SCS Curve Number DEM
2015/7/29
The aim of this study is to determine runoff depth of the Van Lake basin by using remote sensing and geographic information system
(GIS) integration. While determining the results we used various da...
Discussion of "The Cross Section and Time Series of Stock and Bond Returns" by Koijen, Lustig & Van Nieuwerburgh
Cross Section Stock and Bond Returns
2015/7/23
A￠ ne model in which:
ñ 3 priced factors explain the cross section of bond and stock returns:
level, CP, DP
ñ 2 factors explain the time variation in bond and stock returns:
CP, DP