Motivation by positive or negative role models: Regulatory focus determines who will best inspire us.

In 3 studies, the authors demonstrated that individuals are motivated by role models who encourage strategies that fit their regulatory concerns: Promotion-focused individuals, who favor a strategy of pursuing desirable outcomes, are most inspired by positive role models, who highlight strategies for achieving success; prevention-focused individuals, who favor a strategy of avoiding undesirable outcomes, are most motivated by negative role models, who highlight strategies for avoiding failure. In Studies 1 and 2, the authors primed promotion and prevention goals and then examined the impact of role models on motivation. Participants' academic motivation was increased by goal-congruent role models but decreased by goal-incongruent role models. In Study 3, participants were more likely to generate real-life role models that matched their chronic goals. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Characteristics of the Mach Disk in the Underexpanded Jet in which the Back Pressure Continuously Changes with Time

When the high-pressure gas is exhausted to the vacuum chamber from the nozzle, the underexpanded supersonic jet contained with the Mach disk is generally formed. The eventual purpose of this study is to clarify the unsteady phenomenon of the underexpanded free jet when the back pressure continuously changes with time. The characteristic of the Mach disk has been clarified in consideration of the diameter and position of it by the numerical analysis in this paper. The sonic jet of the exit Mach number Me=1 is assumed and the axisymmetric conservational equation is solved by the TVD method in the numerical calculation. The diameter and position of the Mach disk differs with the results of a steady jet and the influence on the continuously changing of the back pressure is evidenced from the comparison with the case of steady supersonic jet.     

油田联合站多参数光纤传感系统的开发

油田联合站多参数光纤传感测控系统主要由外输控制站、内输控制站、总控站、原油罐区安全监控系统和事故预案管理等几部分组成。系统中应用了自行开发的GY系列光纤液位计、GLF光纤流量发讯器和YGO光纤负压报警器。利用光纤传感技术独有的高精度、非电非接触式检测的特点,实现了油田联合站多点多参数全天候自动检测和监控,系统液位控制精度达到±5cm,压力控制精度±2kPa,大罐液位检测精度±2mm,温度检测精度±2℃,使联合站内管理控制达到一体化、智能化。     

牛庄洼陷浊积岩砂体储层物性地震预测

对牛庄洼陷沙三段已知浊积砂体的岩石物性和地震属性进行统计、回归等分析，研究表明：①牛庄洼陷沙三段不同岩性的速度具有一定差异，灰质砂岩速度最高，砂岩速度次之，泥岩速度最低；②反射振幅值太强和太弱的浊积砂体，其储层物性都不好，根据其反射振幅值可定性地判断砂体储层物性；③全区难以确定统一的地震属性与储层参数的对应关系，但同一个砂体，影响其反射振幅变化的外在因素基本相同，可应用回归经验公式对其物性进行定量计算；④在利用地震属性预测储层物性时，不能片面、盲目地追求预测方法和计算模型的普适性。     

探查地下供水水泥管道的综合方法

该文根据实践经验总结了探查地下供水水泥管道的综合方法。文中介绍了管道布设的特点与探查工作的关系,探查工作的顺序和具体方法,强调了应注意的问题。     

Adaptive control for non‐negative and compartmental dynamical systems with applications to general anesthesia

Non‐negative and compartmental dynamical system models are composed of homogeneous interconnected subsystems or compartments which exchange variable non‐negative quantities of material with conservation laws describing transfer, accumulation, and elimination between the compartments and the environment. These models are widespread in biological and physiological sciences and play a key role in understanding these processes. In this paper, we develop a direct adaptive control framework for linear uncertain non‐negative and compartmental systems. The proposed framework is Lyapunov‐based and guarantees partial asymptotic set‐point regulation; that is, asymptotic set‐point stability with respect to part of the closed‐loop system states associated with the plant. In addition, the adaptive controller guarantees that the physical system states remain in the non‐negative orthant of the state space. Finally, a numerical example involving the infusion of the anesthetic drug propofol for maintaining a desired constant level of depth of anesthesia for non‐cardiac surgery is provided to demonstrate the efficacy of the proposed approach. Copyright © 2003 John Wiley & Sons, Ltd.     

带延迟的双险种复合负二项风险模型

针对随着保险公司风险经营规模的不断扩大,单险种风险模型存在局限性的问题,研究了带延迟的双险种复合负二项风险模型,并给出了该模型的破产概率的一般表达式.     

超正压射孔与负压诱喷联作技术

射孔过程中,由于射流的强大压力作用,在射孔孔道内形成压实带,严重影响着油井的产能。用超正压射孔可以解除压实带,但同时失去了负压保护油气层的作用。超正压射孔负压排液诱流技术,就是在井筒内为超正压状态下射孔,解除射孔压实带,在近井带产生多条径向微裂缝,改善近井带导流能力,并在射孔后使井筒立即转为负压状态,达到射孔、改善流动通道和负压诱喷等目的,从而获取更理想的产能。对超正压射孔与负压诱喷联作技术的设计思路、管柱结构及各部件的结构和原理进行了阐述,给出了现场应用程序和应用效果。该技术的成功应用,为低渗透储层射孔完井提供了一条新途径。     

Synthesis,characterization and properties of photoresponsive polymers comprising photocrosslinkable pendant chalcone moieties

New methacrylate monomers, namely 4‐methacryloyloxyphenyl‐4′‐fluorostyryl ketone and 4‐methacryloyloxyphenyl‐4′‐ethylstyryl ketone comprising a free radical polymerizable group and a photocrosslinkable group, were synthesized by reacting the respective hydroxychalcones with methacryloyl chloride in the presence of triethylamine. The monomers were polymerized in the presence of ethyl methyl ketone (EMK) at 70 °C using benzoyl peroxide as the initiator. The chemical structures were characterized using various spectroscopic techniques: ultraviolet, Fourier transform infrared, ¹H NMR and ¹³C NMR. The thermal stability of the polymers was studied using thermogravimetric analysis in nitrogen atmosphere. Differential scanning calorimetry was used to determine the glass transition temperature of the homopolymers. Photocrosslinking of the synthesized homopolymers was investigated in solution. The two homopolymers were crosslinked within 10–15 min. After crosslinking, the homopolymers were insoluble in the same solvent. Copyright © 2006 Society of Chemical Industry     

Computation of Dielectric Constants and Loss Tangents at ISM Band by Measurements of Transmission Coefficients

1　IntroductionWirelesslocalnetworksareexpandingrapidlyastheresultofincreasingdemandforcomputercom municationsandtheadvancesofdigitalradiosys tems.Newdigitalsystemsarebeingimplementedinmicrowaveandmillimeterwavebands .Whereasthequalityofanaloguesystemsisstronglyrelatedtothereceivedpowerofthesignal,digitalcommunicationsaresensitivetootherperturbations.Inparticular,thedecodingefficiencycanbeimpairedbyintersym bolinterferenceowingtomultipatheffects.Agoodknowledgeofthewidebandchannelisthusneces s…