Interpersonal attraction and attitude similarity.

It "was hypothesized that (a) a stranger who is known to have attitudes similar to those of the subject is better liked than a stranger with attitudes dissimilar to those of the subject, (b)… is judged to be more intelligent, better informed, more moral, and better adjusted… and (c)… is evaluated more positively on… four [other] variables." The first 2 hypotheses were confirmed. From Psyc Abstracts 36:04:4GE13B. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

浅述电子清纱器检测头电磁铁的设计

在电子清纱器检测头工作原理的基础上,引入了对电磁铁的介绍,并运用拍合式电磁铁工作原理对磁路进行了分析、计算,并得出了电磁铁吸合力的计算方法。明确了电磁铁吸合力的计算、实验是电子清纱器检测头设计的重要基础环节,进而对电子清纱器检测头电磁铁的设计方法给出指导意见。     

液相法合成纳米氧化铁红的机理研究

分析总结了一些目前制备纳米氧化铁红的多种液相法,并对液相法的共同机理做了较为深入的探讨,在前人研究的基础上提出了内化作用的观点,认为三价铁离子具有强的正电性及氧原子的富电性所形成的静电相互作用是内化作用的本质。概括性的论述了液相制备方法的对内化作用的影响因素,并提出了发展该机理有待进一步研究的问题。     

Ring-Fluorinated Analog of Methyl Eugenol: Attractiveness to and Metabolism in the Oriental Fruit Fly, <Emphasis Type="Italic">Bactrocera Dorsalis</Emphasis> (Hendel)

Oriental fruit fly, Bactrocera dorsalis (Hendel), males are highly attracted to the natural phenylpropanoid methyl eugenol (ME). They compulsively feed on ME and metabolize it to ring and side-chain hydroxylated compounds that have both pheromonal and allomonal functions. Side-chain metabolic activation of ME leading to (E)-coniferyl alcohol has long been recognized as a primary reason for hepatocarcinogenicity of this compound in rodents. Earlier, we demonstrated that introduction of a fluorine atom at the terminal carbon of the ME side chain significantly depressed metabolism and specifically reduced formation of coniferyl alcohol but had little effect on field attractiveness to B. dorsalis. In the current paper, we demonstrate that fluorination of ME at the 4 position of the aromatic ring blocks metabolic ring-hydroxylation but overall enhances side-chain metabolism by increasing production of fluorinated (E)-coniferyl alcohol. In laboratory experiments, oriental fruit fly males were attracted to and readily consumed 1,2-dimethoxy-4-fluoro-5-(2-propenyl)benzene (I) at rates similar to ME but metabolized it faster. Flies that consumed the fluorine analog were as healthy post feeding as ones fed on methyl eugenol. In field trials, the fluorine analog I was ∼50% less attractive to male B. dorsalis than ME.

基于域方法的饱和励磁控制器设计

同步发电机励磁系统受到物理结构的限制,励磁电压的输出含有饱和环节,其具有非线性特征。基于域方法,提出饱和励磁控制器的设计思路。首先,利用扩张状态观测器,对模型内部不确定性和外部扰动进行动态补偿,实现非线性系统的反馈线性化;然后,引入饱和指示器,将含饱和环节的线性化模型转化为多面体模型,并将饱和系统的二次稳定性条件用不等式表示出来;引入初始状态域,将初始状态域含于椭球吸引域内的几何关系表示为不等式;最后,为使系统在给定初始状态域、吸引域和线性矩阵不等式区域内满足二次稳定条件,将控制器设计问题转化为双线性矩阵不等式的求解问题。算例研究表明:设计的控制器是有效的,具有优良的控制性能。     

不同频率下材料特性对电磁吸力的影响

基于工作在不同频率下的电气设备应用日益广泛,对不同频率下影响断路器电磁脱扣性能的主要因素进行了探讨.在考虑铁损和磁导率的基础上,分析了频率变化对电磁吸力的影响,相关结论对船用电磁式电器的设计与制造具有参考意义.     

Colored apparel and its potential influence on heterosexual attraction

The objective of this study is to determine if men would follow the “red effect” when choosing colors for women to wear on a date, and also to determine if the colors that men would wear when going on a date would be the same as the colors that females (their date) would wish them to wear. A set of psychophysical data was generated from this experiment, where participants were asked to rank a set of 10 colored samples based on preference for each question asked. There were three different sets of colored samples. The set of colored samples given to the participant depended on the question. A total of five questions were asked. Scaling analysis was done on the data to organize a set of items according to preferences providing values, an interval scale (Z values), that correspond to the relative perceptual differences among the stimuli. The Z values were graphed to show the general preference of colors for women to wear, and the preference of colors for men to wear. A Spearman's rank-order correlation coefficient (SRCC) was calculated comparing each individual's rank order with the mean rank order for that specific question. An average Spearman's rank order was calculated for each question and each gender in order to determine the variability in answers. Scaling results indicate that men follow the “red effect,” but women preferred to wear other colors such as turquoise, blue, or yellow depending on the outfit. Males and females agreed that no matter the colored bottoms (denim or black), blue was the preferred color top for men to wear. SRCC results showed a lot of variability between individual answers and the mean answer indicating that participants' rankings did not necessarily agree with general color preferences presented in the scaling analysis. While scaling analysis might suggest certain color preferences such as men following the “red effect” and women preferring to wear blue, the poor correlation found using SRCC between the individual answers and the mean rank orders suggests that color preferences for each individual are inherently unique.     

Control of aluminum phosphate coating on mullite fibers by surface modification with polyethylenimine

Aluminum phosphate (AlPO₄) is a promising oxidation-resistant and weak interface for ceramic-matrix composites. In this research, AlPO₄ coating was deposited on mullite fibers by an improved liquid-phase method based on electrostatic attraction. A cationic polyelectrolyte, polyethylenimine (PEI), was used for surface modification of mullite fibers. The formation process, phase evolution and microstructure of the coating were studied. The zeta potential of AlPO₄ particles, PEI-adsorbed AlPO₄ particles, and PEI-adsorbed mullite particles was characterized to find the proper pH value for improving electrostatic attraction. The obtained AlPO₄ coating was porous and continuous, whose thickness could be controlled by multiple coating cycles. The relatively low calcination temperature (600 or 1000 °C) was a useful heat treatment method to develop bonding between coating and fiber as well as reduce the fiber strength degradation. The phase transformations of AlPO₄ have little volume change, and cristobalite AlPO₄ is thermal compatible with mullite. Therefore, the coating structure was preserved after calcining at 1200 °C. The technique is also applicable for other fibers contained mullite phase to fabricate high-performance AlPO₄ coated mullite/mullite composites.     

Saddle-node equilibrium points on the stability boundary of nonlinear autonomous dynamical systems

A complete characterization of the stability boundary of an asymptotically stable equilibrium point in the presence of type-k saddle-node non-hyperbolic equilibrium points, with k ≥ 0, on the stability boundary is developed in this paper. Under the transversality condition, it is shown that the stability boundary is composed of the stable manifolds of the hyperbolic equilibrium points on the stability boundary, the stable manifolds of type-0 saddle-node equilibrium points on the stability boundary and the stable centre and centre manifolds of the type-r saddle-node equilibrium points with r ≥ 1 on the stability boundary. This characterization is the first step to understanding the behaviour of stability regions and stability boundaries in the occurrence of saddle-node bifurcations on the stability boundary.     

Active Disturbance Rejection Control for Teleoperation Systems with Actuator Saturation

In this paper, stabilization of a nonlinear bilateral teleoperation system with time delays and actuator saturation is investigated via active disturbance rejection control (ADRC). An linear extended state observer is introduced to deal with the lumped system uncertainties. Lyapunov functions are given to prove the stabilization of the closed‐loop bilateral teleoperation system. Two Phantom Premium 1.5 HighForce (HF) robot manipulators are used in experiments to demonstrate the effectiveness of the proposed method in this paper.