硫酸盐含量对全固废材料固化盐渍土抗压强度的影响

为探讨硫酸盐含量对全固废材料固化盐渍土抗压强度及微观结构的影响,采用击实试验和无侧限抗压强度试验,并结合扫描电镜、EDS、X射线衍射和热重分析等微观测试结果,从固化盐渍土的火山灰反应产物及其数量等角度分析含盐量对固化盐渍土抗压强度变化的影响。结果表明:硫酸盐含量低于2.7%时,固化盐渍土抗压强度随含盐量的增加呈先增大后减小,抗压强度峰值对应的含盐量为1.8%;固化盐渍土的火山灰反应产物主要为C-S-H和AFt,硫酸盐含量从0.3%增至1.8%时,反应产物明显增多,致使固化土抗压强度增大;但当硫酸盐含量从1.8%增至2.7%时,膨胀性AFt将试件内部孔隙完全填充并产生胀裂破坏,造成抗压强度降低。研究成果为全固废材料固化硫酸盐渍土的工程应用奠定了基础,对环境保护也有积极贡献。     

不同污泥干化焚烧技术路线全链条碳足迹分析

碳足迹分析是目前国际上常用的技术能耗评估和资源优化配置的方法.文中采用IPCC《国家温室气体清单指南》提供的方法,对干化-焚烧、深度脱水-干化-焚烧、厌氧消化-深度脱水-干化-焚烧3种基于焚烧的污泥处理处置技术路线进行碳足迹分析.结果表明,污泥干化-焚烧技术路线净碳排放量最低.厌氧消化虽然是污泥资源化利用的重要方式,但由于我国污泥有机质偏低,污泥单独厌氧产气率低,沼气利用产生的能量不足以弥补该过程的消耗.污泥干化和脱水环节产生的碳排放量较大,因此,优化热源、减少药剂使用可以实现碳减排;另一方面,推行污泥与城市有机固废高效协同厌氧,提高沼气产率,增加碳汇,也可以减少总的碳排放量.     

基于3DMax技术的胡杨茎生长模拟

植物生长模拟研究,是利用计算机技术以可视化的形式描述植物的生长状态。本研究在综合国内外相关研究成果的基础上,以南疆胡杨茎为研究对象,通过对胡杨茎的生长因子及结构形态的研究,提出一种基于三维结构的胡杨茎生长模型,并运用3DMax技术建模,实现胡杨茎的生长形态的可视化。本研究能促进人们对胡杨生长过程的理解和感知,为分析胡杨结构功能关系、调控生长模式等提供重要参考。     

Tetranorsesquiterpenoids as Attractants of Yucca Moths to Yucca Flowers

Journal of Chemical Ecology - The obligate pollination mutualism between Yucca and yucca moths is a classical example of coevolution. Oviposition and active pollination by female yucca moths occur...     

The North Carolina Breast Cancer Screening Program: foundations and design of a model for reaching older, minority, rural women

Breast cancer screening programs do not reach all women at the same rate. Screening mammography use varies according to sociodemographic characteristics; mammography utilization is highest among women in their fifties but then decreases with age. In North Carolina, breast cancer is a particular burden for Black and lower-income women. Black women are more likely to be diagnosed with late stage disease, and their rate of breast cancer mortality is higher than it is for White women even though the incidence in White women is greater. Older, Black, and low-income women are less likely to obtain screening by mammography and clinical breast examination. The Black-White gap is even more pronounced among rural women, in part because they are more likely to be poor. The North Carolina Breast Cancer Screening Program (NC-BCSP) was established to increase the rate of regular mammography screening by an absolute 20% in 3 years among older Black women ages 50 and older in five rural counties in the eastern part of the state. In this paper, we describe the genesis of this comprehensive community intervention model, highlighting the behavioral science constructs, health education principles, and theories of behavioral and organizational change that form its conceptual foundation. NC-BCSP's theoretical foundations include the social ecological perspective, the PRECEDE model of health promotion, the Health Belief Model of individual change, and the "stages of change" transtheoretical model. We also review the experiences and lessons learned from two previous outreach initiatives in North Carolina that provided valuable "lessons" in the development of the NC-BCSP intervention model. In the second half of the paper, we describe the actual NC-BCSP interventions, activities, and evaluation tools, citing specific examples of how the underlying theories are implemented. NC-BCSP's goal goes beyond individual behavior change to raise low mammography screening rates among Black women in rural North Carolina. Its ultimate objective is to create linkages across agencies, and between agencies and communities, that will endure after the research project ends.     

一种带有空槽分瓣定子结构的直驱永磁电机

随着风电市场的发展,风力发电机功率逐渐提高,电机体积越来越大,体积增大为直驱电机运输带来困难。当电机外径大于5 m时,运输成本会随着电机直径增加而迅速增加。为了解决这一问题,需要考虑将电机沿着径向分为若干个模块,运输到项目现场后再进行电机总装配。电机分瓣后同一个线圈无法同时存在于不同的两瓣电机上,采用空槽结构可以有效解决这个问题。首先提出采用空槽结构实现直驱电机的分瓣技术。其次通过对比空槽与不空槽电机的电磁性能分析空槽的可行性。最后对比不同极槽配合下空槽对电机的电磁性能影响,得出空槽方案的可行性。     

Accuracy and efficacy of chest radiography in the intensive care unit

264 patients with cancer of larynx, 21 female and 234 male, had a testosterone and sex hormone binding globulin (SHBG) before the treatment in serum estimated. Because of dependence of levels of hormones the group of patients was divided into three following groups: "lower than standard", "standard", "higher than standard". The correlation between these groups and sex, age, localization of tumor, organs' advances, stage of morphological malignancy and type of cancer was reported. Anomalous values of testosterone were in male group more frequently reported. Anomalous values of SHBG were similar in male and female groups, but in the female group there was a significant majority of "lower than standard" values reported. The majority of abnormal values of testosterone and SHBG was described in groups of age higher than 50 years. There were no differences in testosterone and SHBG levels in different localization of tumors in larynx. In advanced stage T3 and T4 there were more frequent lower mean values of testosterone levels and higher values of SHBG levels in comparison to T2 stages. In tumors in G1 and G2 stages of histological malignancy higher levels of SHBG and higher mean levels of testosterone. The tumors in stage G3 the hormone levels were lowers were observed. The levels of SHBG in groups of carcinoma planoepitheliale keratodes were in 66% higher than in a group of carcinoma planoepitheliale akeratodes but in both groups the levels of testosterone were nearing the same. In group of patients with larynx cancer the negative correlation between the levels of testosterone and SHBG was not observed. Higher SHBG levels were not always accompanied by lower testosterone levels.     

融合内容和服务的未来网络体系架构

互联网难以适应其通信模式由主机为中心向以内容和服务为中心的转变,从而提出了融合内容和服务的未来网络体系架构(Content and Service Aware Network:CoreNet)。CoreNet基于面向内容和服务的设计理念,并通过灵活的协议栈"腰"设计允许应用显式地表达它们的通信意愿,使得网络能感知不同应用模式并进行优化处理。同时,通过网络内置缓存和高效任播路由,提升内容分发和服务获取的效率,适应未来人机物三元融合创新应用的需求。     

板翅式全热交换器运行条件对性能影响的研究

对板翅式全热交换器在不同运行条件下的性能进行了实验研究,分析了性能参数和运行参数之间的关系,指出了风量与阻力损失、空气温湿度差与换热效率的关系.     

黑体空腔式中间包钢水连续测温系统与应用

描述了黑体空腔式钢水连续测温系统的理论基础、结构原理、校验方法、测试结果分析和现场应用情况。该测温系统的测温偏差≤±3℃,测温管寿命可达15～25h(取决于钢种和工艺等),测温成本比现行的快速热电偶实际消耗略低,系统运行稳定可靠,并取得显著的综合效益。