Elementary Pairs of Primitive Normal Theories

The main objective of the paper is proving that classes of primitive normal, primitive bound, antiadditive, and additive theories are closed under P-expansions. This phenomenon is quite remarkable, for the main structure classes of theories studied within model theory (such as stable, totally transcendental, etc.) do not possess such a property. Furthermore, it is proved that primitive bound theories are P-stable, and we furnish an example of a primitive bound theory with models that are not primitive bound.     

远红外窗口聚乙烯性能研究

采用压缩模塑法制备了聚乙烯远红外窗口，对红外窗口材料的成型条件和性能进行了测试分析。结果表明，成型温度为150℃，样品的成型压力对红外透过率没有影响，窗口材料的红外透过率随厚度的增加而减小，最后选定样品厚度为2mm，在15μm以后具有较好的透过率。抗腐蚀性能测试结果表明，材料耐强酸、强碱及部分有机溶剂。     

On States on Orthogonally Closed Subspaces of an Inner Product Space

We show that every finitely additive state on the system F(S) of all orthogonally closed subspaces of an infinite-dimensional inner product space S attains all values from the real interval [0,1]. In particular, we show that there is no finitely additive countably-valued state on F(S) whenever dim S=. The main technique we use is an embedding of L(H _n ) into F(S).     

Improving the electrochemical performances of active carbon-based supercapacitors through the combination of introducing functional groups and using redox additive electrolyte

High-performance and low-cost electrochemical capacitors (ECs) are essential for large-scale applications in energy storage. In this work, the specific capacitance of active carbon (AC) electrode was significantly improved through the combination of introducing functional groups on the surface of AC and adding redox-active molecules (K₃Fe(CN)₆) into 2?M KOH aqueous electrolytes. The surface-oxygen functionalized AC (FAC) was synthesized using HNO₃ echoed as the electrode and 2?M KOH with 0.1?M K₃Fe(CN)₆ as the electrolyte. The surface functional groups of the AC not only contribute to the pseudocapacitance but also increase the active sites of the electrode/electrolyte interface, which enhances the electrochemical activity of the Fe(CN)₆^3?/Fe(CN)₆^4? redox pair, thus leading to high capacitance. In the redox electrolyte, the specific capacitance was much higher in 229.17?F?g^?1 (1?A?g^?1) achieved for those FAC than in raw AC (only 147.06?F?g^?1). Similarly, the FAC electrode suggested high energy density and extended cycling stability in the KOH?+?K₃Fe(CN)₆ electrolyte.     

A method for more accurate FEA results on a medical device developed by 3D technologies

At present, 3‐dimensional models of all additive manufactured objects (AMOs) are accepted as a solid model for finite element analysis (FEA). FEA of AMOs may not reveal the real results because mechanical properties of default materials in CAD software and newly built AMOs are not equal to each other. This may produce problems especially for the end user due to unexpected failure or wear off. The aim of this study was to compare FEA results of an additive manufactured Ankle Foot Orthosis model under 2 different value sets, namely default material‐based mechanical properties and measured mechanical properties. In order to determine the real mechanical properties of the additive manufactured Ankle Foot Orthosis, 3‐dimensional printed test specimens with different infill densities were prepared and tested according to the recommended standards. Mechanical test results were then loaded in the CAD software and FEA was performed. This study illustrated that default mechanical properties of existing materials in CAD software produce misleading simulation results for AMOs, ie, real mechanical properties should be used to get more accurate results.     

Reliable controller for nonlinear multiagent system with additive time varying delay and nonlinear actuator faults

In this paper, the problem of nonlinear multiagent system with reliable control is taken into account. The prescribed system consists of additive time-varying delay, actuator faults with both linear and nonlinear functions. The main focus of this paper is to design a reliable control which guarantees the stability and consensus condition of the proposed system. Actuator faults with linear and nonlinear functions are considered in the control input. From the implementation of integral inequality, the linear matrix inequality format is derived by constructing the suitable Lyapunov Krasovskii functional for the specified system. Terminally numerical examples are furnished for the efficiency of the specified method.     

甲苯气相选择氧化制苯甲醛 Ⅴ.K~+添加量对V_2O_5/TiO_2催化剂的影响

在Ｖ２Ｏ５／ＴｉＯ２催化剂中添加Ｋ＋，发现当Ｋ＋／Ｖ摩尔比为０．０４－０．０７时，催化剂性能得到显著改善．利用ＢＥＴ、ＸＲＤ、Ｈ２－ＴＰＲ、Ｏ２－ＴＰＤ－ＭＳ和化学分析法，研究了催化剂结构和性能变化．结果表明，随Ｋ＋添加量的不同，Ｖ２Ｏ５／ＴｉＯ２催化剂结构和表面活性氧性质发生了很大变化，从而影响了催化剂反应性能．     

一种新型低毒安全香烟添加剂的研究

一种新型低毒安全香烟添加剂的研究崔学文（四川三峡学院化工系万县６３４０００）关键词低毒安全香烟,香烟添加剂流行病学、动物实验、人体病理解剖研究结果表明,吸烟与许多疾病的发生呈正相关关系,与吸烟有关的主要疾病有：肺癌,支气管炎,肺气肿,口腔癌,膀胱癌,...     

Local field brownian motion

A local field is any locally compact, non-discrete field other than the field of real numbers or the field of complex numbers. There is a natural notion of Gaussian measures on a local field vector space. We construct and study a specific local field Gaussian stochastic process taking values in a finite dimensional local field vector space and indexed by another finite dimensional local field vector space. This process has a structure that strongly reflects the algebraic and geometric structure of the underlying index space and, as such, plays the same role in the local field setting that standard Brownian motion and the related multiparameter processes such as Lévy's multiparameter Brownian motion play in a Euclidean context. We investigate the theory of additive functionals and the related potential theory for this process and show that it strongly resembles the Euclidean prototype. As a particular consequence of this investigation, we find that a local time process exists when the process hits points. We give two intrinsic constructions of the local time at a given level. These constructions are analogous to the dilation construction of Kingman and the Hausdorff measure construction of Taylor and Wendel in the Euclidean case. Finally, the local time is shown to be continuous as a measure valued stochastic process indexed by the levèl at which it is evaluated.Research supported in part by an NSF Grant and Presidential Young Investigator Award.     

HPLC Separation of the atropisomers of some substitutedN-Arylthiazoline-2-Thiones withγ-Cyclodextrin as a chiral mobile phase additive: Size and lipophilicity effects of substitutents

The chromatographic separations of some substitutedN-arylthiazoline-2-thione atropisomers are described, using reversed-phase HPLC with-cyclodextrin as a chiral mobile phase additive. The effects of the size and lipophilicity of various substituents are discussed and emphasize the close relationship between inclusion inside the cyclodextrin cavity and the chromatographic selectivity.