论清洁生产、环境教育与现代城市建设的关系

本文论及现代城市的环境问题,“清洁生产”与“环境教育”内涵,阐述了发展“环境教育”对推行“清洁生产”及现代城市建设的关系。     

贵州息烽磷矿的聚磷环境与富集机制

息烽磷矿是黔中元古代震旦纪陡山沱期磷块岩矿床的重要组成部分。矿层厚而稳定,品位高、露采。在野外勘探工作的基础上着重探讨磷块岩的富集成矿规律。     

攀西地区小麦育种目标的制定

本文根据近年来国内外对小麦育种动态的研究情况。结合攀西地区实际,通过对该地区小麦生产地的抽样调查与分析,制定出了适合该区区域特点的小麦育种目标。     

农药化学中的绿色化学

绿色化学是从根本上消除环境污染的必由之路。由于某些传统农药是引起环境污染的一个重要因素,因而对农药化学中的绿色化学进行研究和推广具有非常重要的意义。本文应用绿色化学原理,对农药化学中的一些绿色化学方法和技术作了简单介绍。     

面向Agent软件的体系结构研究

分析了已有的面向agent软件的体系结构,指出了各种体系结构的技术特点、及其存在的缺乏社会结构和环境分析的问题. 在此基础上针对网格环境自治性、异构性、混沌性的特点提出了适应新一代网络及网格环境的agent软件的体系结构. 讨论了agent体系结构中一些关键组件的功能.     

从环境考古角度对古居巢国的蠡测

巢国(又称居巢)是殷周时期的重要方国之一.春秋战国时,它是吴、楚两国相互争夺的一个小国,先是归服于楚,后为吴所灭,汉朝后则鲜见典籍.后人在从历史文献考察这一古国的都城时,对它的消失始终有一些难解之谜.近年唐家嘴遗址的发现,重新引发对这一问题的讨论.通过对唐家嘴遗址文化层含碳较高的中间层位14C测年,距今年代2090±130aBP.结合文化层考虑,大约终止在1800年前的这个遗址,似乎可以与历史记载赤乌二年(A.D.239年)发生的"陷巢州"相合.本文以历史文献为根据,以环境考古理论为指导,初步划定古居巢国都城的大体位置及其功能、规模与等级,探讨唐家嘴汉代遗址与古居巢国都城之间的关系,反思人类活动对巢湖环境变迁的影响.     

Aerosol generation and measurement of multi-wall carbon nanotubes

Mass production of some kinds of carbon nanotubes (CNT) is now imminent, but little is known about the risk associated with their exposure. It is important to assess the propensity of the CNT to release particles into air for its risk assessment. In this study, we conducted aerosolization of a multi-walled CNT (MWCNT) to assess several aerosol measuring instruments. A Palas RBG-1000 aerosol generator applied mechanical stress to the MWCNT by a rotating brush at feed rates ranging from 2 to 20 mm/h, which the MWCNT was fed to a two-component fluidized bed. The fluidized bed aerosol generator was used to disperse the MWCNT aerosol once more. We monitored the generated MWCNT aerosol concentrations based on number, area, and mass using a condensation particle counter and nanoparticle surface area monitor. Also we quantified carbon mass in MWCNT aerosol samples by a carbon monitor. The shape of aerosolized MWCNT fibers was observed by a scanning electron microscope (SEM). The MWCNT was well dispersed by our system. We found isolated MWCNT fibers in the aerosols by SEM and the count median lengths of MWCNT fibers were 4–6 μm. The MWCNT was quantified by the carbon monitor with a modified condition based on the NIOSH analytical manual. The MWCNT aerosol concentration (EC mass base) was 4 mg/m³ at 2 mm/h in this study.     

不同基质中s1p1组态的能级

研究了s1p1组态能级位置及能级劈裂同基质的关系. 结果表明, Sn2+的A、B、C带能级和In+、Tl+的A、B带能级位置同基质的环境因子he呈线性关系, 能级能量随he的增大而减小, 给出了相应的经验公式, 并计算了In+和Tl+自由离子的A、B带能级能量. 计算结果同实验数据十分吻合, 最大的偏差来自Tl+的B带, 偏差率仅为-7.34%. 随基质he的增大, 高能级能量比低能级下降得更快, A、B和C带间的能级间距相应变小. 通过对比发现: Sn2+、In+、Tl+的A、B带能级对基质的敏感性存在较大差异, Sn2+能级能量受基质变化影响最大, In+的能级能量随基质变化最小. 更为重要的是, 发现随着he的增大, Sn2+、In+和Tl+的A、B和C带能级劈裂相应变小, 甚至不再劈裂, 很好地解释了光谱现象.     

HUMANN-based system to identify benzimidazole fungicides using multi-synchronous fluorescence spectra: An ensemble approach

In this paper, we approach, using neural computation and ensemble systems, a pattern classification problem in fluorescence spectrometry, the resolution of difficult multi-fungicide mixtures (overlapping), specifically the benzimidazole fungicides, benomyl, carbendazim, thiabendazole and fuberidazole. These fungicides are compounds of an important environmental interest. Because of this, from an analytical point of view, it is interesting to develop sensitive, selective and simple methods for their determination. Fluorescence spectrometry has proven to be a sensitive and selective technique for determination of many compounds of environmental interest, but in some cases it is not enough. HUMANN is a hierarchical, unsupervised, modular, adaptive neural net with high biological plausibility, which has shown to be suitable for identification of these fungicides and organochlorinated compounds of environmental interest. We propose two modular artificial intelligent systems, with a structure of pre-processing and processing stage, a multi-input HUMANN-based system, using multi-fluorescence spectra as input to the system, and a HUMANN-ensemble system. We analyze the optimal configuration of inputs and the ensemble in order to obtain better results. We study such figures as precision and sensitivity of the method. Our proposal is a smart, flexible and effective complementary method, which allows reducing the analytical and/or computational complexity of the analysis. Figure Stages in identification of benzimidazole fungicides Based on a contribution presented at the XIII International Symposium on Luminescence Spectrometry held in Bologna, Italy from Sept. 7–11, 2008.     

一种机器人路径规划的元胞自动机算法

利用元胞自动机模型解决移动机器人的运动路径规划问题。该算法环境空间已知且被分解成规则的方形元胞网格,机器人根据转换规则由当前元胞向邻居元胞移动最终形成最优路径。最后在实验环境中进行仿真,结果显示在机器人起点和终点的运动方向有约束的情况下也能迅速规划出最优路径,表明了该算法的可行性和有效性。