Atomic Decompositions of Triebel-Lizorkin Spaces with Local Weights and Applications

In this paper,the authors characterize the inhomogeneous Triebel-Lizorkin spaces Fp,q s,w(Rn)with local weight w by using the Lusin-area functions for the full ranges of the indices,and then establish their atomic decompositions for s ∈ R,p ∈(0,1] and q ∈ [p,∞).The novelty is that the weight w here satisfies the classical Muckenhoupt condition only on balls with their radii in(0,1].Finite atomic decompositions for smooth functions in Fp,q s,w(Rn)are also obtained,which further implies that a(sub)linear operator that maps smooth atoms of Fp,q s,w(Rn)uniformly into a bounded set of a(quasi-)Banach space is extended to a bounded operator on the whole Fp,q s,w(Rn).As an application,the boundedness of the local Riesz operator on the space Fp,q s,w(Rn)is obtained.     

草一光可湿性粉剂活性成分的反相高效液相色谱分析

采用反相高效液相色谱法同时测定15.5％草一光可湿性粉剂中的异丙甲草胶和苄嘧黄隆两种活性成分,以V（甲醇）：V（酸性水）=70：30作为流动相,采用ZORBAXSB-C18色谱柱。方法回收率达98.1％～102.6％,变异系数为0.4％～0.8％。     

镧掺杂纳米TiO2应用助剂筛选及其对农药残留的光催化降解效果

通过润湿分散剂(十二烷基苯磺酸钠ABS-Na、木质素磺酸钠SL和羧甲基纤维素钠CMC)和载体(白炭黑、高岭土)的筛选,确定了60%稀土镧掺杂纳米TiO2可湿性粉剂(WP)的最优配方。试验结果表明:十二烷基苯磺酸钠为2%,木质素磺酸钠6%,采用高岭土作载体,可湿性粉剂的悬浮率达到了98.12%,润湿时间为4.09 s,且冷贮、热贮合格。通过克百威溶液在太阳光下的消失情况来研究La-TiO2可湿性粉剂的光催化降解效果。试验表明:稀土镧掺杂后的纳米TiO2光催化活性得到了提高,且使用La-TiO2可湿性粉剂能进一步提高克百威的光催化降解效果,当降解效果达最大时,La-TiO2最佳用量为0.2 g.L-1,而直接使用La-TiO2粉末,其最佳用量为0.4 g.L-1。     

透明度可调的自适应光学材料

美吲哈佛大学的研究人员说，一种受眼泪启发而研制出来的新型自适应薄膜在条件改变时能自动“开关”透明度，并防水和防冻，同时还能自动清洁。这种控制光学透明度和可湿性的能力很像覆在我们眼球上的那层薄薄的湿气，它使得自适应材料应用范围不断扩大，例如可在干爽的晴天变得不透明而在雾蒙蒙的雨天变成既防水又透明的帐篷。     

Simulation solution for micro droplet impingementon a flat dry surface

This paper presents a computational fluid dynamics approach for micro droplet impacting on a flat dry surface. A two-phase flow approach is employed using FLUENT VOF multiphase model to calculate the flow distributions upon impact. The contact line velocity is tracked to calculate the dynamic contact angle through user defined function program. The study showed that the treatment of contact line velocity is crucial for the accurate prediction of droplet impacting on poor wettability surfaces. On the other hand, it has much less influence on the simulation of droplet impacting on good wettability surfaces. Good fit between simulation results and experimental data is obtained using this model.     

利用溶胶-凝胶法制备不同尺寸的疏水型SiO2纳米微粒的研究（英文）

本文利用溶胶-凝胶(sol-gel)技术并在Stber法的基础上,制备了粒径尺寸在20 nm到90 nm可控的SiO2纳米微粒。通过控制氨水的起始浓度可较为便捷的调控粒子的尺寸。六甲基二硅氮烷(HMDS)用做疏水改性剂,以调整纳米微粒的润湿性。改性粒子的红外光谱亦证明了HMDS的成功引入。这些疏水亲油的纳米微粒可望用于纳米液中,以增大注水量并最终提高油层采收率。     

A Finite-Dimensional Completely Integrable System Associated with Boussinesq Hierarchy

In this paper, a new completely integrable system related to the complex spectral problem -φ xx＋（i/4）wpx＋（i/4）（wp）x＋（1/4）vφ=iλφxand the constrained flows of the Boussinesq equations axe generated. According to the viewpoint of Hamiltonian mechanics, the Euler-Lagrange equations and the Legendre transformations, a reasonable Jacobi-Ostrogradsky coordinate system is obtained. Moreover, by means of the constrained conditions between the potentiaJ u, v and the eigenfunction φ, the involutive representations of the solutions for the Boussinesq equation hieraxchy axe given.     

A Thermodynamic Analysis of the Validity of Wenzel and Cassie＇s Equations ＊

Wettable properties of a considered solid on its contact angle （CA） can be analyzed theoretically using the classical Wenzel and Cassie＇s equations. However, recent strong interest in superhydrophobic surfaces has demanded a re-examination of the applicability of the two equations. We report a thermodynamic analysis to determine the universality, in particular, the limitations of the two equations. Using some special surfaces, we demonstrate that the two equations are valid for micro-scale heterogeneous structures, however they are invalid for macro-scale heterogeneous surfaces. Furthermore, the present calculations suggest that fundamental thermodynamic analysis is the most powerful and reliable approach to determine the comprehensive wettability for various structurally patterned surfaces.     

新型植物生长调节剂开发成功

由江西科技师范学院应用化学系夏红英教授主持的国家科技部农业科技成果转化资金项目——复配新型植物生长调节剂多烯可湿性粉剂,日前通过了国家验收。     

Superhydrophobicity of LaMnO3 Coatings with Hierarchical Microstructures

As proposed by Herminghaus, a hierarchical structure could render any surface nonwettable as long as the roughness amplitude at small scales is sufficient to suspend a free liquid surface. Recently we reported that the wettability of La0.7Sr0.3MnO3, an intrinsic hydrophilic oxide, can be tuned from superhydrophilicity to superhydrophobicity by hierarchical microstructures generated by annealing the coatings of La0.7Sr0.3MnO3 powder in nanometric scale at different temperatures. Here we further demonstrate the similar phenomenon observed on LaMaO3 coatings, which conforms THAT the surface geometrical structure is a key factor to determine the wettability.