工程管理专业平台课程融合“三维体系”的构建研究

文章分析了工程管理专业课程融合体系构建的必要性。基于文献研究法、典型高校专业调研和典型高校院系主任专家咨询等方法,以知识融合为核心,以"全生命周期执业能力"和"能力教育"为导向,构建了由实践教学体系、能力导向及全生命周期三个维度穿插在一起的工程管理专业平台课程融合"三维体系"。最后,针对课程整合"三维体系"提出了坚持以知识融合为核心思维,以学科交叉为重要载体的教学改革思路,重点打造"国际化、博士化、双师型"的工程管理专业教学科研团队,注重校企合作,强化社会网络,促进"政产学研"融合三点实施性的建议,以期为新形势下工程管理专业教育教学改革提供新思维和新模式。     

砂土地震液化的模糊综合评判法

根据砂土液化问题具有的模糊性和不确定性，建立了一种判别砂土液化发生可能性的模糊综合评判模型。在提出的砂土液化模糊综合评判模型中，通过综合地震烈度、标贯击数、地下水位和平均粒径等影响砂土地震液化的因素，采用梯形隶属函数并分别给出各因素隶属函数的表达式。通过工程实例计算验证了该模型的可行性，计算过程简单明了，有一定的实用价值。     

两级吸收制冷循环中间压力对热力系数的影响

分析了两级吸收溴化锂制冷循环传统热力计算方法的不足，提出了通过计算中间压力来确定热力循环的方法以及中间压力的数学模型，获得了中间压力的优化计算模型。     

水泥砂浆塑性收缩开裂试验条件的研究

研究了约束状况，失水条件及试件厚度等因素对水泥砂浆塑性收缩开裂性能的影响。结果表明：（1）增加钢筋框中部约束或取消钢筋框均可减少砂浆塑性收缩开裂性能；底部凹凸状约束及面层铺设钢丝网可使砂浆塑性开裂有所减小，但不能消除塑性开裂现象；基本去除约束的准自由状态可使砂浆免除塑性收缩开裂。（2）失水条件对砂浆塑性收缩开裂有明显影响，灯与电网扇同时开启所形成的“风吹日晒”比单纯“风吹”、“日晒”更易于使砂浆塑性收缩开裂；加强抹面处理可使塑性收缩开裂减小，维持较长时间的洒水养护可消除塑性开裂现象。（3）增加试件厚度可减少砂浆的塑性收缩开裂，混凝土的抗塑性收缩开裂能力比砂浆强。     

环境污染综合评价的数学模型

环境污染综合评价的问题,无论从环境科学本身或是从环境保护角度来看,都具有重要意义.过去常用的一些数学模式,各有特点.本文以系统分析的方式,建立了一个环境污染的分级综合评价模型,同时提出用二元对比排序法分配权值.     

Community response to environmental noise and the impact on cardiovascular risk score

Objective

The objective of our study was to investigate and evaluate the relationship between road traffic noise and cardiovascular risk.

Methods

The study sample (n = 659; 36.9% male, 63.1% female university students, mean age 22.83 ± 1.58 years) included a group exposed to road traffic noise (n = 280, L_eq,24 h = 67 ± 2 dB(A)) and a control group (n = 379, L_eq,24 h = 58.7 ± 6 dB(A)). Subjective response was determined by a validated noise annoyance questionnaire. The ten year risk of developing a coronary heart disease event was quantified as an evaluation of cardiovascular risk (SCORE60, Framingham 10-year risk estimation and projection to the age of 60, relative risk SCORE chart).

Results

Cardiovascular risk scores were significantly higher in the exposed group based on the Framingham scores projected to the age of 60, SCORE60 (AOR = 2.72 (95% CI = 1.21-6.15)) and the relative risk SCORE chart (AOR = 2.81 (1.46-5.41)).

Conclusions

These findings highlight the association between road traffic noise and cardiovascular risk.     

Examining spatially varying relationships between land use and water quality using geographically weighted regression I: model design and evaluation

Traditional regression techniques such as ordinary least squares (OLS) can hide important local variations in the model parameters, and are not able to deal with spatial autocorrelations existing in the variables. A recently developed technique, geographically weighted regression (GWR), is used to examine the relationships between land use and water quality in eastern Massachusetts, USA. GWR models make great improvements of model performance over OLS models, which is proved by F-test and comparisons of model R² and corrected Akaike Information Criterion (AIC_c) from both GWR and OLS. GWR models also improve the reliabilities of the relationships by reducing spatial autocorrelations. The application of GWR models finds that the relationships between land use and water quality are not constant over space but show great spatial non-stationarity. GWR models are able to reveal the information previously ignored by OLS models on the local causes of water pollution, and so improve the model ability to explain local situation of water quality. The results of this study suggest that GWR technique has the potential to serve as a useful tool for environmental research and management at watershed, regional, national and even global scales.     

小空间火灾多元探测装置和实现方法研究

针对小空间火灾探测方法单一、误报漏报率高、采集数据处理简单的问题，提出1 种小空间火灾多元探测装置及方法，能够实现对火灾的烟雾、CO 气体、温度、火焰等的多元探测，多角度多方位采集火灾信号，利用信息融合技术和算法，寻找特征信息之间的规律，对数据信息进行分析解析、优化组合，运用人工神经网络和模糊推理方法，采取反复的样本训练将探测数据的误差降到最低，从而准确地判断火灾所处的阶段和类型，及时有效地采取灭火抑制措施。研究结果证明，小空间火灾多元探测方法能够满足小空间的火灾探测要求，减少了公共财产的损失，对火灾探测的进一步研究具有重要意义。     

空调系统的神经网络信息融合故障诊断研究

空调系统的故障诊断十分复杂。针对传统故障诊断的不足,提出神经网络与信息融合相结合的故障综合诊断方法,对来自多个时刻的故障信息进行融合,得到更为准确的故障综合诊断结果。通过在集中空调教学模型上的仿真试验,证明了该故障诊断方法的可靠性。     

基于非下采样Contourlet的熵测度图像融合算法

活性测度是图像融合过程中的重要衡量工具.通过其提取的某种特征信息,来决定哪幅输入图像的特征更为明显.在基于多分辨率分解的融合算法中,常用的活性测度只考虑各层高频子带系数本身,忽略了低频系数所提供的信息.考虑到综合高、低频系数对于活性测度的影响,基于非下采样Contourlet变换良好的平移不变性、多方向等特性,提出了一...