Remediating number combination and word problem deficits among students with mathematics difficulties: A randomized control trial.

The purposes of this study were to assess the efficacy of remedial tutoring for 3rd graders with mathematics difficulty, to investigate whether tutoring is differentially efficacious depending on students’ math difficulty status (mathematics difficulty alone vs. mathematics plus reading difficulty), to explore transfer from number combination (NC) remediation, and to examine the transportability of the tutoring protocols. At 2 sites, 133 students were stratified on mathematics difficulty status and site and then randomly assigned to 3 conditions: control (no tutoring), tutoring on automatic retrieval of NCs (i.e., Math Flash), or tutoring on word problems with attention to the foundational skills of NCs, procedural calculations, and algebra (i.e., Pirate Math). Tutoring occurred for 16 weeks, 3 sessions per week and 20–30 min per session. Math Flash enhanced fluency with NCs with transfer to procedural computation but without transfer to algebra or word problems. Pirate Math enhanced word problem skill as well as fluency with NCs, procedural computation, and algebra. Tutoring was not differentially efficacious as a function of students’ mathematics difficulty status. The tutoring protocols proved transportable across sites. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

An integrated color‐appearance model using CIELUV and its applications

A new type of color‐appearance model is presented together with its formulations. It is named In‐CAM(CIELUV), which means the integrated color‐appearance model using CIELUV space. Using the In‐CAM(CIELUV), we can integrate its fields of applications in both colorimetric engineering and artistic color design. Various applications are introduced in colorimetric and color design fields. The In‐CAM(CIELUV) connects directly colorimetric color space and perceptual Hue‐Tone color order systems. In other words, the In‐CAM (CIELUV) gives a colorimetric basis for Hue‐Tone system. The three color attributes in the In‐CAM(CIELUV) space are mutually independent. This is a very convenient feature for selecting color combinations. Some two‐color combinations selected systematically in the In‐CAM(CIELUV) space are shown. © 2008 Wiley Periodicals, Inc. Col Res Appl, 33, 125–134, 2008     

一种基于多元信息库的自适应汉语歧义切分方法

在分析目前分词方法的基础上提出了一种通过建立多元信息库、采用改进型的粗分算法以拔出所有可能存在歧义的句子、借助于人工干预建立错误切分歧异词库等，实现汉语歧异切分的方法，通过修改、插入多元信息库中的信息量，进一步设计了一个具有自适应能力的歧义切分方法，并通过实验证明该方法能够有效改进汉语分词中错误歧义切分的结果．     

基于RFID双频卡的多义路径识别的研究与实现

高速路网内起讫点之间存在二义性路径,导致高速公路收费拆帐复杂且不准确,如何进行多义路径识别是关系到联网收费能否大范围实现的一个至关重要问题。文中提出基于双频卡的多义路径识别方案,可在不改造现有高速公路出入口车道软硬件的前提下,解决高速公路联网收费多义性路径车辆通行费收取、拆分与结算等一系列问题。     

Additivity of colour harmony

An additive approach to predict harmony for three‐colour combinations is proposed in this article. It is hypothesised that a three‐colour combination can be seen as a combination of three colour pairs, each generating a harmonious/disharmonious feeling that can be quantified by a two‐colour harmony model the authors previously derived; the average of these three harmony values can then determine the overall harmony. To establish whether this hypothesis was valid, two psychophysical experiments were conducted in the United Kingdom and the United States. Experiment 1 used 6545 three‐colour wheels as the stimuli, presented individually on a calibrated cathode ray tube display. Under the same viewing conditions, Experiment 2 used 111 interior images as the stimuli. In each experiment, 20 British and 31 American participated as the observers. An additional test was undertaken, with 64 observers taking part, to address the issue of large sample size as encountered in Experiment 1, using 90 colour wheels selected randomly from those used in Experiment 1. The experimental results show close agreement between the observers' response and the harmony value predicted by the proposed method, with a correlation coefficient of 0.71 for the 6545 colour wheels, 0.93 for the 111 interior images and 0.88 for the additional 90 colour wheels. The results support the additive approach as a simple but robust method for predicting harmony in any three‐colour combinations, which may also apply to combinations generated by any number of colours. © 2010 Wiley Periodicals, Inc. Col Res Appl, 2011     

情景互动法在《仪器分析》课程教学中的应用研究

针对《仪器分析》课程的特点与教学现状,提出在教学中运用"情景互动"的方法,并且采用"三结合"的教学模式,使不同专业的学生在学习《仪器分析》这门课时能够带着浓厚的兴趣自觉学习理论知识,并加深对理论知识的理解,提高分析解决实际问题的能力。     

焦炉大车激光测距自动定位系统改造

焦炉大车激光测距自动定位系统由变频器、激光测距仪、传动控制系统、HMI系统和PLC系统等组成,通过采用DP通讯及自动定位程序控制进行改进,实现了大车的炉号显示和精确自动定位等功能。激光测距定位精度高(在±5mm以内),具有投资少、成本低、维护简单的特点。     

Testing the optimality properties of a dual antibiotic treatment in a two-locus,two-allele model

Mathematically speaking, it is self-evident that the optimal control of complex, dynamical systems with many interacting components cannot be achieved with ‘non-responsive’ control strategies that are constant through time. Although there are notable exceptions, this is usually how we design treatments with antimicrobial drugs when we give the same dose and the same antibiotic combination each day. Here, we use a frequency- and density-dependent pharmacogenetics mathematical model based on a standard, two-locus, two-allele representation of how bacteria resist antibiotics to probe the question of whether optimal antibiotic treatments might, in fact, be constant through time. The model describes the ecological and evolutionary dynamics of different sub-populations of the bacterium Escherichia coli that compete for a single limiting resource in a two-drug environment. We use in vitro evolutionary experiments to calibrate and test the model and show that antibiotic environments can support dynamically changing and heterogeneous population structures. We then demonstrate, theoretically and empirically, that the best treatment strategies should adapt through time and constant strategies are not optimal.     

论负荷开关-熔断器组合电器在变压器保护环节中的应用

本文通过对负荷开关一熔断器组合电器配合特性及变压器励磁涌流的分析,结合工程实例,介绍了在变压器保护环节中组合电器的合理应用。     

表面双稳铁电液晶中的层结构

从铁电液晶（ Ｆ Ｌ Ｃ）的物性出发， 描述了表面双稳铁电液晶（ Ｓ Ｓ Ｆ Ｌ Ｃ）显示结构原理和相应特点； 系统地介绍了 Ｓ Ｓ Ｆ Ｌ Ｃ 中的液晶层结构分类及相关特征。阐述了不同层结构对液晶器件双稳态的获得及电光特性的影响。