某工程质量事故的处理

因湿陷引起防空洞破坏，导致住宅楼地基下陷，拉裂墙体。为了阻止裂纹发展，维护住宅楼安全，通过型钢支撑保证施工安全，浇筑钢筋混凝土内衬，保证了防空洞的正常使用和住宅楼的结构安全，达到了预期目的。     

Microbial volatile organic compounds in the air of moldy and mold-free indoor environments

A single-blinded study was performed to analyze whether indoor environments with and without mold infestation differ significantly in microbial volatile organic compounds (MVOC) concentrations. Air sampling for MVOC was performed in 40 dwellings with evident mold damage and in 44 dwellings, where mold damage was excluded after a thorough investigation. The characteristics of the dwellings, climatic parameters, airborne particles and air exchange rates (AER) were recorded. The parameters mold status, characteristics of the interiors and measured climatic parameters were included in the multiple regression model. The results show no significant association between most of the analyzed MVOC and the mold status. Only the compounds 2-methyl-1-butanol and 1-octen-3-ol indicated a statistically significant, but weak association with the mold status. However, the concentrations of the so-called MVOC were mainly influenced by other indoor factors. 2-Methylfuran and 3-methylfuran, often used as main indicators for mold damage, had a highly significant correlation with the smoking status. These compounds were also significantly correlated with the humidity and the AER. The compounds 3-methyl-1-butanol, 2-hexanone, 3-heptanone and dimethyl disulfide were weakly correlated with the recorded parameters, the humidity being the strongest influencing factor. Only 2-methyl-1-butanol and 1-octen-3-ol showed a statistically significant association with the mold status; however, only a small portion (10% in this case) of the total variability could be explained by the predictor mold status; they do not qualify as indicator compounds, because such minor correlations lead to a too excessive part of incorrect classifications, meaning that the diagnostic sensitivity and specificity of these compounds are too low. PRACTICAL IMPLICATIONS: The assumption that mold infestations might be detected by microbial VOC emissions must be considered with great reservation. The major part of the total variability of the measured MVOC concentrations originates from not known influencing factors and/or from factors not directly associated with the mold status of the dwellings (confounders). More specific and sensitive markers for the assessment of the mold status should be found, if the screening for mold infestations should be performed by volatile organic compounds.     

中国革命与建设的一条定律──从国情出发,走自己的路

国情,是一个综合范畴和动态概念。中国革命与建设,先后处于两种不同的国情,即经济落后、政治反动的半殖民地半封建的社会和建国后以社会主义公有制为主体、人民当家做主的社会主义社会。生产落后,经济发展不平衡,又是二者共同点。中国革命与建设的过程,也是对中国国情认识不断深化的过程;正反两方面的经验教训告诉我们,从国情出发,走自己的路,这是推进中国革命与建设事业胜利前进的基本经验和基本规律。     

汉画像石“车马出行图”的构图形式

汉画像石作为古代留给我们的艺术珍宝,在民族文化遗产和古代传统文化中占有重要的地位,是我国文化艺术的瑰宝。至今发现的汉墓画像石中较多出现车马出行的画像,而在车马出行画像中较多呈现着"左向行进"的构图形式。这种构图形式又蕴涵着两汉时期人们所普遍认同的传统思想。而这种"左向行进"的构图方式似乎又体现着"西向行进"的方位意义和方位趋向。     

变电站巡检系统的人机理论应用可行性分析

应用人机系统理论,开发软件巡检系统平台来提高电气设备状态检测管理水平,尽可能杜绝人为因素的影响,使定性、定量、客观地、即时考核设备巡检人员的工作绩效成为可能。利用人机系统理论获得最佳巡视效果,从而实现对现场巡视作业安全、质量的“可控”和“在控”,获得最佳安全效益和经济效益。     

明末清初中国文人东渡对日本文化的影响

在明末清初的朝代更替中，有不少中国文人由于种种原因东渡扶桑，在形成一次移民浪潮的同时，也掀起了中日文化交流史上中国向日本进行文化传播的高潮。在文化传播过程中，中国文人在儒学、教育、史学、文学、武术、建筑、书法、绘画、医学等方面对日本产生了巨大的影响。     

我国对外工程咨询业区域结构演变研究

基于1995~2008年间我国27个省份对外工程咨询发展状况,运用聚类分析法对其区域结构演变进行研究,认为我国对外工程咨询业正由过去的整体实力不强、区域发展不均,向总量提升与结构优化的方向发展。继续推动该转变将有利于进一步做强做大我国工程咨询业,提升国际竞争力。     

浅议高职教育的教学质量

高职教育的教学质量问题是高职教育发展遇到的必然问题,在看待教学质量方面,要结合人才培养的认同标准、根据教学质量的体现和当前高职生的各方面表现来进行,避免走入传统质量观的误区。     

基于图像处理的玉米颗粒霉变程度检测方法研究

提出利用HSV模型快速识别霉变玉米颗粒与霉变等级的方法。基于感染霉菌的玉米颗粒表层会发生颜色褐变、发黑等特点,首先对彩色玉米图像进行图像增强,然后采用V分量的阈值区分正常玉米颗粒与霉变玉米颗粒,再通过H与V分量的阈值区分轻度霉变与严重霉变玉米颗粒。试验表明,该方法对正常玉米颗粒、轻度霉变玉米颗粒、严重霉变玉米颗粒的检测准确率可达93.7%、80%、92.9%以上,能够达到区分检测的目的。     

预应力钢丝连续高速拉拔时的温升与降温

要实现高强度、粗规格预应力钢丝的连续高速拉拔 ,首先要解决的是钢丝发热问题。通过两组试验对高碳钢丝连续拉拔时的温升对钢丝力学性能的影响进行论述 ,得出因温升而产生的时效脆化现象严重降低钢丝的塑性和韧性指标 ,提出控制温升应采取的措施