浅析服饰的审美     

刘雪花 《南宁职业技术学院学报》2005,10(1):22-25

服饰是文化的化身,气质的浓缩,身份的象征。而服饰的审美元素包括了色彩组合之美、造型风格 之美、材质图案之美、工艺制作之美、缺陷掩饰之美、整体搭配之美等,服饰的审美应融合服饰、穿衣者、看衣 者三方面,建立"以人为本"的服务目标,这样人人均可成为主宰自己个性,把握潮流命脉的服装设计师。  相似文献   

Mostly Harmless Direct Effects: A Comparison of Different Latent Markov Modeling Approaches     

Roberto Di Mari  Zsuzsa Bakk 《Structural equation modeling》2018,25(3):467-483

We evaluate the performance of the most common estimators of latent Markov (LM) models with covariates in the presence of direct effects of the covariates on the indicators of the LM model. In LM modeling it is common practice not to model such direct effects, ignoring the consequences that might have on the overall model fit and the parameters of interest. However, in the general literature about latent variable modeling it is well known that unmodeled direct effects can severely bias the parameter estimates of the model at hand. We evaluate how the presence of direct effects in?uences the bias and efficiency of the 3 most common estimators of LM models, the 1-step, 2-step, and 3-step approaches. Furthermore, we propose amendments (that were thus far not used in the context of LM modeling) to the 2- and 3-step approaches that make it possible to account for direct effects and eliminate bias as a consequence. This is done by modeling the (possible) direct effects in the first step of the stepwise estimation procedures. We evaluate the proposed estimators through an extensive simulation study, and illustrate them via a real data application. Our results show, first, that the augmented 2-step and 3-step approaches are unbiased and efficient estimators of LM models with direct effects. Second, ignoring the direct effects leads to biased estimates with all existing estimators, the 1-step approach being the most sensitive.  相似文献   

Modeling and Simulation of Photoelectronic Lambda Bipolar Transistor     

张世林张波  郭维廉 《天津大学学报(英文版)》2005,11(5):348-352

Based on the region model of lambda bipolar transistor （ LBT）, a dividing region theory model of PLBT is set up.simulated and verified. Firstly, the principal operations of different kinds of photoelectronic lambda bipolar transistor ,（ PLBT） are characterized by a simple circuit model. Through mathematical analysis of the equivalent circuit, the typical characteristics curve is divided into positive resistance, peak, negative resistance and cutoff regions. Secondly. by analyzing and simulating this model, the ratio of MOSFET width to channel length, threshold voltage and common emitter gain are discovered as the main structure parameters that determine the characteristic curves of PLBT. And peak region width, peak current value, negative resistance value and valley voltage value of PLBT can be changed conveniently according to the actual demands by modifying these parameters. Finally comparisons of the characteristics of the fabricated devices and the simulation results are made, which show that the analytical results are in agreement with the observed devices characteristics.  相似文献   

Mediated Modeling in Science Education     

Ibrahim A. Halloun 《Science & Education》2007,16(7-8):653-697

Following two decades of corroboration, modeling theory is presented as a pedagogical theory that promotes mediated experiential learning of model-laden theory and inquiry in science education. Students develop experiential knowledge about physical realities through interplay between their own ideas about the physical world and particular patterns in this world. Under teacher mediation, they represent each pattern with a particular model that they develop through a five-phase learning cycle, following particular modeling schemata of well-defined dimensions and rules of engagement. Significantly greater student achievement has been increasingly demonstrated under mediated modeling than under conventional instruction of lecture and demonstration, especially in secondary school and university physics courses. The improved achievement is reflected in more meaningful understanding of course materials, better learning styles, higher success rates, lower attrition rates and narrower gaps between students of different backgrounds.  相似文献   

Found Things: Genre,Narrative, and Identification in a Networked Activist Organization     

Natasha N. Jones 《Technical Communication Quarterly》2016,25(4):298-318

This article examines the inter-relational role of genre and narrative in a social justice organization. Employing an interdisciplinary approach, this test presents a process-centered approach using genre ecology modeling and narrative maps. This approach can help scholars understand how genre and narrative dialectically promote collaboration and coordination while simultaneously promoting the process of consubstantiality and rhetorical identification in networked organizations.  相似文献   

线性代数教学改革中融入数学建模思想的探讨     

付传秀  周建新 《教育教学论坛》2019,(21):110-111

将数学建模的思想融入到高校数学教学改革中,是当前应用型本科教学改革的一项重要举措。本文探讨了如何将数学建模的思想融入到线性代数课程教学中,旨在培养学生运用数学知识解决实际问题的能力,提高学生的数学素养和创新思维。  相似文献   

The Role of the Internet in the Adoption of Computer Modeling as Legitimate High School Science     

Barowy  Bill  Laserna  Catalina 《Journal of Science Education and Technology》1997,6(1):3-13

We describe a recent project that explored combined use of Internet client-server technology and interactive computer modeling software for improving secondary science teaching. We envisioned a constructivist network in which teachers make contributions to the resources available. The purpose of the network was to promote the emerging field of computer modeling in high school science. Our approach coupled the networking and curricular initiatives with evaluation of changes in classroom core practices—those which have a traceable impact on student learning. Distribution of work, ideology of science, teaching styles, and curricular goals come together dynamically to influence teachers' use of modeling technology in the high school science classroom. A combination of Internet tools, each affording a different contribution to the spread of innovation, provides the best promise for future networks of this kind.  相似文献   

基于MDT生成表驱动零件的研究     

陈丽君  赵凤芹 《襄樊职业技术学院学报》2002,1(4):31-32

基于MDT生成表驱动标准件模型库的方法和步骤，对如何建立模型、使用设计变量、给模型分配设计变量以及设置和编辑电子表进行了详细的论述。实践证明，利用此方法建立标准件模型库方例快捷，能大大提高设计效率。  相似文献   

基于VHDL-AMS的结型场效应管行为建模与仿真     

高献伟  冼立勤  耿彦明  赵成 《实验室研究与探索》2006,25(6):604-607

提出一种基于SPICE模型半导体器件的VHDL-AMS行为建模方法,给出了结型场效应管模型中温度效应、噪声、直流和电容方程的行为模型,最后以N沟道结型场效应管共源极放大电路为例在混合信号仿真器SMASH5.5中验证了模型的正确性。  相似文献   

Bridging inquiry‐based science and constructionism: Exploring the alignment between students tinkering with code of computational models and goals of inquiry          下载免费PDF全文

Aditi Wagh  Kate Cook‐Whitt  Uri Wilensky 《科学教学研究杂志》2017,54(5):615-641

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