企业技术能力成长中技术选择的机制分析

企业技术能力成长对所选择的技术存在着初始条件的高度敏感依赖性。以企业技术能力成长为出发点,分析了技术选择的影响因素,阐述了技术选择应遵循的原则,对企业技术能力成长中技术选择的机理进行了探讨。     

基于T-S模糊模型的太阳位置算法

为实现太阳位置跟踪以达到提高太阳能利用率的目的,提出一种基于T-S模糊模型的太阳位置算法.该算法根据在固定地点太阳高度角随时间变化的二元函数,建立高度角为输出的T-S模糊模型,通过该模型计算出太阳的位置.该模型利用三角形隶属度函数使运算量降低,并易于实现.通过使用传统算法与基于T-S模糊模型的太阳位置算法计算出的上海临港某地4天的高度角和方位角变化曲线的对比,表明该方法具有较高的精度,能够满足普通光伏系统的要求.     

基于市场轨道的创新路径研究--以苹果公司为例

技术轨道理论为企业技术创新路径选择提供了重要启示,但实践中存在的“创新路径多样性”对其提出了挑战。构建了“市场轨道”概念模型,并通过美国苹果公司的创新案例研究论证和剖析了市场轨道的存在及其所对应的创新路径。基于市场需求的动态演化特性,以满足新需求、打开新市场为导向的创新路径是新“市场轨道”创立的结果。“市场轨道”概念模型拓展了技术轨道理论,总结了基于需求导向和利用市场机会进行创新的演化规律,可以丰富企业的创新路径选择空间。     

Is outcome related to movement variability in golf?

The aim of this study was to develop a method to quantify movement variability in the backswing and downswing phase of the golf swing and statistically assess whether there was any relationship between movement variability and outcome variability. Sixteen highly skilled golfers each performed 10 swings wearing retro-reflective markers which were tracked by a three-dimensional (3D) motion analysis system operating at 400 Hz. Ball launch conditions were captured using a launch monitor. Performance variability was calculated for each body marker based on a scalene ellipsoid volume concept which produced a score representative of the 3D variability over the 10 trials. Outcome variability was quantified as the coefficient of variation of ball velocity for the 10 trials. The statistical analysis revealed no significant correlations between performance variability for each marker trajectory and outcome variability. Performance variability in the backswing or downswing was not related to ball velocity variability. It was postulated that individual players used their own strategies in order to control their performance variability, such that it had no effect on outcome variability.     

Rapid odor perception in rat olfactory bulb by microelectrode array

Responses of 302 mitral/tufted (M/T) cells in the olfactory bulb were recorded from 42 anesthetized freely breathing rats using a 16-channel microwire electrode array. Saturated vapors of four pure chemicals, anisole, carvone, citral and isoamyl acetate were applied. After aligning spike trains to the initial phase of the inhalation after odor onset, the responses of M/T cells showed transient temporal features including excitatory and inhibitory patterns. Both odor-evoked patterns indicated that mammals recognize odors within a short respiration cycle after odor stimulus. Due to the small amount of information received from a single cell, we pooled results from all responsive M/T cells to study the ensemble activity. The firing rates of the cell ensembles were computed over 100 ms bins and population vectors were constructed. The high dimension vectors were condensed into three dimensions for visualization using principal component analysis. The trajectories of both excitatory and inhibitory cell ensembles displayed strong dynamics during odor stimulation. The distances among cluster centers were enlarged compared to those of the resting state. Thus, we presumed that pictures of odor information sent to higher brain regions were depicted and odor discrimination was completed within the first breathing cycle.     

Technological trajectory based on micro level technological capability: Evidence from the Brazilian rice industry

This study examines technological capability accumulation and the Brazilian rice industry's technological trajectory. Multiple case design was chosen, with an analysis of seven firms involved in the Brazilian rice industry. The results indicate three factors: The first was the identification of technological landmarks for firms in this sector (peeling and polishing, electronic grain selection, electronic packaging, use of forklifts and palletizers, and Industry 4.0). The second is related to the fact that different firms implemented innovative activities and technologies at different speeds, originating from the sector's different technological trajectories. The third is associated with identifying activities within the Brazilian rice industry that can be generalized to other food industries. These results have implications for formulating public policies in the sector, such as creating producer support mechanisms (research and technology transfer institutions), qualification of professionals, and encouragement for economic efficiency and competition.     

基于眼动跟踪实验的视译轨迹研究

本文以认知口译学为理论基础,提出了TD眼动跟踪实验的视译（SI）研究方法,初步建构TD眼动跟踪的SI研究范式。研究者对所教授的非英语专业的83名本科生做了SI眼动跟踪实验。通过对被试者的TD眼动跟踪轨迹研究,实验数据解析及SPSS统计比较计算,发现：1）平均眼动跟踪轨迹TD占位率高于偏离率,且TD占位率越高,SI平均成绩就越高;反之亦然;2）眼动跟踪轨迹回视率越低,SI成绩就越高;反之,眼动跟踪轨迹回视率越高,成绩就越低。应对策略：1）TD占位策略：眼动跟踪轨迹紧跟TD;2）零回视策略：眼动跟踪轨迹正向流动,非逆向流动;3）认知灵动策略：积极认知TD内容,激活LTM信息,发挥WM功效,精准快速对应SL信息。     

教育实习指导教师身份认同研究

教育实习指导教师作为教育范式轨迹的鲜活的代表,为实习教师提供一套可以让他们采用、修改或拒绝的模式,因此教育实习指导教师的身份认同表现对实习教师的专业成长具有一定的影响。通过对指导话语所表现的身份认同进行对比分析,揭示了当今教育改革背景下实习指导教师身份认同的新特点,以及对实习教师具有启迪作用的指导教师身份认同表现,即课堂和生活中本真自我与指导身份认同的交融。     

Pre- and Postnatal Women's Leisure Time Physical Activity Patterns

The purpose of this study was to examine women's leisure time physical activity (LTPA) before pregnancy, during pregnancy, and through the first 7 months postnatal. Pre- and postnatal women (n = 309) completed the 12-month Modifiable Activity Questionnaire and demographic information. Multilevel modeling was used to estimate a growth curve representing the average change in LTPA over time and intraindividual variations in the average growth curve over time. Growth curve estimates for the linear, quadratic, and cubic trends were significant (p < .05), indicating that LTPA declined during pregnancy but then increased following birth. The results also demonstrated that the individual trajectories of LTPA varied substantially from the average growth curve. One demographic predictor variable (having other children at home) was significant (p < .05).     

氯和几个烷烃反应的立体动力学研究

介绍了在扩展的London-Eyring-Polanyi-Sato(LEPS)势能面基础上,利用准经典轨线法计算了Cl+CH4、Cl+C2H6、Cl+C3H8反应的产物极化分布,并分析了在质心系计算得到四个广义极化微分反应截面(PD-DCS)(2π/σ)(dσ00/dωt)(2π/σ)(dσ20/dωt)(2π/σ)(dσ22+/dωt)(2π/σ)(dσ21-/dωt)和k-k′-j′三矢量相关的极角分布P(φr)、k′-j′两矢量相关的p(rθ)分布以及用rθ和r表示的产物转动角动量的空间分布.