棉核·苏云菌防治棉铃虫大田示范试验

在147团19连进行了棉核.苏云菌防治棉铃虫田间药效试验,在绵铃虫发生期,用棉核.苏云菌悬浮剂30、40、150ml/666.7m2剂量喷雾防治,药后4、7、10天调查记录幼虫数,计算虫口减退率和校正防效。结果表明,处理2较处理1防效高10.6%,持续时间长,对天敌和作物安全,持续时间长,可推广应用。     

MindManager在远程教学网站设计中的应用

在远程教学网站设计过程中,一个高效便捷的、能增进设计者的创造力和理解力以及使设计者之间更好沟通的工具是很重要的。MindManager能充分发掘设计者的思维方式,显著提高工作效率。探讨了其在教学网站栏目规划、界面设计、站内链接结构及文件目录组织方面的应用。     

独立学院《统计学》课程教学方法初探

《统计学》独立学院经济管理类专业的基础核心课程之一,内容广泛、系统性强,而且计算多,公式复杂,难以记忆,学生学习起来感觉枯燥乏味;本文针对独立学院学生的特点,对《统计学》理论教学与实践教学所采用的教学方法进行了探讨。     

Perfluoroalkyl substances in the blood samples from a male population of Sweden

Temporal trends of perfluoroalkyl substances （PFASs） have been determined in the blood samples from several countries globally including a female population in Sweden recently, yet little is known about the time trends in the blood levels of these compounds in Swedish male populations over recent years. In this study, the fourteen target PFASs consisted of four perfluorosulfonates （PFSAs） and ten perfluorocarboxylates （PFCAs） in the whole blood samples, collected from 153 Swedish elderly men during the period between 2008 and 2010, were analyzed via ultra-performance liquid chromatography-tandem mass spectrometry （UPLC-MS/MS）. As the dominant PFASs contaminants in the blood samples, perfluorooctane sulfo- nate （PFOS） showed the highest geometric mean （GM） at 8.5 ng/mL, ranging from 1.7 to 29 ng/mL, while blood perfluorooctanoic acid （PFOA） contained the GM of 1.8 ng/mL, ranging from 0.35 to 6.4 ng/mL. Both the levels of these two compounds were lower than those determined in the blood samples of Swedish elderly pop- ulations derived from the late 1990s. According to the temporal trend analysis, over the three years, the blood levels of PFOS in Swedish male populations declined 16 % per annum, while those of perfluoroundecanoic acid （PFUnDA） increased 6.1% per annum, which were con- sistent with those reported previously for the populations from other countries.     

Nanoscale structural and electronic evolution for increased efficiency in polymer solar cells monitored by electric scanning probe microscopy

Control of blend morphology at multi-scale is critical for optimizing the power conversion efficiency （PCE） of plastic solar cells. To better understand the physics of photoactive layer in the organic photovoltaic devices, it is necessary to gain understanding of morphol- ogy and the corresponding electronic property. Herein we report the correlation between nanoscale structural, electric properties of bulk heterojunction （BHJ） solar cells and the annealing-induced PCE change. We demonstrate that the PCE of BHJ solar cells are dramatically improved （from 1.3 % to 4.6 %） by thermal annealing, which results from P3HT crystalline stacking and the PCBM aggregation for interpenetrated network. The similar trend for annealing- induced photovoltage and PCE evolution present as an initial increase followed by a decrease with the annealing time and temperature. The surface roughness increase slowly and then abruptly after the same inflection points observed for photovoltage and PCE. The phase images in electric force microscopy indicate the optimized P3HT and PCBM crystallization for interpenetrating network formation considering the spectroscopic results as well. From the correlation between surface photovoltage, blend morphology, and PCE, we propose a model to illustrate the film structure and its evolution under different annealing conditions. This work would benefit the better design and optimization of the morphology and local electric proper- ties of solar cell active layers for improved PCE.     

地方理论视域下《管家》中的二元对立

玛丽莲·罗宾逊是美国当代著名小说家.她的作品题材大多与环境息息相关,反映了当代社会的环境问题.《管家》是她的第一部小说,国内学界对它的介绍和研究还比较匮乏.文章运用劳伦斯·布伊尔的地方理论来探讨《管家》中的二元对立.一方面,地方被人为地划分为两个互为对立的部分：人类与自然;另一方面,在人类社会内部,男性与女性处于对立状态,两性不平等现象特别严重.有鉴于此,罗宾逊希冀改变这种现状,呼吁人类突破地方局限,实现地方的统一,以最终实现人与自然之间以及两性之间的和谐共处.     

离散度与网络图的结构

利用离散度的定义和性质，给出了离散度与一些简单网络图的结构关系，为用离散度研究网络图的结构奠定了基础。     

欧·亨利短篇小说的艺术特色探析

美国作家欧·亨利是伟大的短篇小说家。他的创作风格特别是以曲折的故事情节与出人意料的结局而闻名于世。在小说语言方面,多用修辞语言使故事愈发生动,愈发诙谐幽默,。本文拿《警察与赞美诗》小说为例进一步探讨了欧·亨利短篇小说的艺术特色。     

浅谈1：10000基础地理信息空间数据质量检查与控制

结合甘肃省平（凉）庆（阳）测区航测1：10000地形图生产项目，阐述了航空摄影测量数字化成图的生产流程及测绘产品检查的内容和方式，提出了质量检查及质量控制的预防措施。