模糊控制技术在空调系统中的应用

本文从实际工程出发,对沈阳某智能大厦A区空调系统的控制策略进行改进,对于空调机组(AHU),利用模糊自适应PID控制代替不够理想的PID控制,从而实现对具有非线性、时变性、干扰大、大滞后因素和不确定随机干扰因素的系统优化控制。较原来的PID控制策略有着收敛速度快、过渡时间短、超调量小、适应能力强等优点,并且节约了能源。     

中国城市软件产业发展格局研究

软件产业是一种典型的城市经济形态,但并不是所有的城市都具有发展软件产业的区位优势。本文以信息产业部公布历年软件企业百强资讯为依据,尝试描述、分析我国软件产业发展空间聚集特点、软件产业发展的产业生态环境和演进态势。     

Developing Creativity Ecosystems: Preparing College Students for Tomorrow's Innovation Challenge

Eileen Hulme, Ben Thomas, and Hal DeLaRosby argue for the importance of creativity as a learning outcome and challenge higher education to produce students capable of becoming the innovative leaders the twenty‐first‐century economy requires.     

Multilevel design of school effectiveness studies in sub-Saharan Africa

School-based improvement programs represent a core strategy in improving education because they can leverage pre-existing social and organizational structures to promote coordinated and comprehensive change across multiple facets of schooling. School-based programs are generally designed to be implemented by intact schools/districts, frequently making it infeasible or atheoretical to assign students within the same school to different conditions while ensuring study validity. Rather, studies frequently assign intact schools/districts to treatment conditions to accommodate the multilevel structure of schooling and the theory of action underlying many school-based programs. In planning such studies, effective and efficient design requires plausible values of the variance partition coefficients and the variance explained by covariates during the design stage. Using representative samples of each country, we develop empirical estimates of design parameters within and across 15 countries that are intended to inform and facilitate the efficient design of multisite cluster-randomized studies of school improvement in sub-Saharan Africa.