常见纺织油剂的结构及组分分析

采用硅胶柱色谱法分离纺织油剂中的各组分,利用红外光谱法和质谱法对所分离组分进行结构鉴定,确定该样品的化学组成,并用重量法对其含量进行定量分析。     

激发学习兴趣构建和谐课堂

兴趣是人类最好的老师,只有激发学生探究的兴趣,唤起学生自主学习,才能使学生真正成为学习的主人。在我们的数学课堂教学中要注意导课新颖,结课巧妙;注意运用直观,加强学生动手实践;注意创设情境,联系学生的生活实际,使我们的数学课堂实现课伊始,趣已生;课进行,趣正浓;课结束,趣犹存;使学生热爱数学,让数学课堂扬起兴趣的风帆。     

理工科大学生人文素质现状及思考

从对江苏工业学院理工科大学生人文素质现状的抽样调查来看,由于专业教育的偏向,使得理工科大学生的人文素质普遍偏低,这带来了一系列的负面作用,使得他们在文化素养、思想道德修养、创新能力、综合适应能力、价值观等方面略逊一筹.因此加强理工科大学生的人文素质教育就显得尤为重要,而这可以试着从理工科学生的培养模式、考核方式及教师队伍建设、政策鼓励等方面做出一定的改进,以提高理工科大学生学习人文知识的兴趣和机会,以保障人文素质教育在理工科学生中的顺利开展.     

A time-space network based international transportation scheduling problem incorporating CO2 emission levels

Environmental problems have received a great deal of attention in recent years.In particular,CO2 emissions worsen global warming and other environmental problems.The transport sector accounts for 20% of the total CO2 emissions.Therefore,the CO2 emission reduction of the transport sector is of great importance.In order to reduce emissions effectively,it is necessary to change the distribution and transportation processes.The purpose of this study is to minimize both the transportation costs and CO2 emissions during transportation.Our model considers a transportation scheduling problem in which loads are transported from an overseas production base to three domestic demand centers.The need for time-space networks arises naturally to improve the model.It is possible to know the distance carriers are moving,and also consider the timetables of carriers during transportation.Carrier choice,less-than carrier load,and domestic transportation among demand centers are considered as the three target areas to reduce CO2 emissions during the distribution process.The research model was formulated as a mixed integer programming （MIP） problem.It achieves cost reduction,and will contribute to improvement of the natural environment.     

A pilot field-scale study on biotrickling filter treatment of NH3-containing odorous gases from organic waste composting plants

The use of a biotrickling filter was investigated for a pilot field-scale elimination of NH3 gas and other odorous gases from a composting plant in Tongzhou District, Beijing. The inlet gas flow rate was 3500 m3/h and NH3 concentration fluctuated between 2.76–27.84 mg/m3, while the average outlet concentration was 1.06 mg/m3 with an average of 94.9% removal. Critical volumetric loading (removal efficiency=100%) was 11.22 g-N/(m3·h). The odor concentration removal was 86.7%. NH3 removal efficiency decreased as the free ammonia (FA) in the trickling liquid increased. The pressure drop was maintained at about 50 Pa/m and was never more than 55 Pa/m. During the experiment, there was neither backflushing required nor any indication of clogging. Overall, the biotrickling filter was highly efficient and cost-effective for the simultaneous biodegradation of NH3 and other odorous gases from composting, suggesting the possibility of treating odorous gases at the industrial level.     

河南新农村中小学音乐艺术教育存在的问题及发展对策

河南省新农村中小学音乐艺术教育中存在着一些问题,如受＂应试教育＂的影响,地方行政部门、学校领导不重视音乐艺术教育,认为音乐艺术课是学生劳逸结合的调节课,可有可无;农村音乐艺术类教师严重缺乏,经费短缺现象极为严重等。文章通过对农村中小学音乐艺术教育现状的分析,探讨了新时期农村中小学音乐教育所面临的问题及发展对策。     

对高校运用多媒体课件教学与教学效果的相关因素探究

本研究就高校课堂教学中多媒体课件教学效果的相关因素,对西北民族大学12所学院的500名师生进行了相关调查研究。结果显示：课件制作质量、教师教学方法与教学效果之间存在显著正相关;课堂教学环境中,音响效果与教学效果之间也存在一定正相关;教师普遍认为课件操作水平对教学效果无显著影响：学生则认为教师的课件操作水平对教学效果影响显著。     

宣统元年直隶省协赈陇灾考

宣统元年甘肃省爆发了严重的旱灾,灾情十分严重,一时间舆论纷纷指责陕甘总督升允匿灾三年不报,朝廷遂将其罢免。与此同时,各地展开了协助赈济陇灾的活动。直隶省的协赈活动虽然发起的时间比较晚,但无论官方还是民间募捐活动都非常踊跃,对协助赈灾尽了应有之力。同时,这次活动也反映出了清末直隶省募捐赈灾的一些特点。     

试析新桂系时期广西的特种教育

20世纪30年代新桂系集团为培养人才,集中精力进行“四大建设”,巩固统治,在少数民族地区实施了“特种部族”教育。特种教育作为一种特殊的教育模式,在新桂系的大力推行下,具有鲜明的特点,产生了积极作用．     

津巴布韦烤烟品种在文山烟区的适应性初探

为筛选出适宜云南文山烟区种植的津巴布韦烤烟品种,选择该国培育并引入我国的KRK26,KRK22,KRK23和T29,以当地主栽品种K326和云烟87为对照进行同田对比试验.结果表明：1）津巴布韦品种总体表现为植株较高、节距较稀、叶片较宽、叶色浅绿、现蕾较晚、大田生育期较长、抗倒伏和抗黑胫病的能力较弱、原烟叶片偏薄等特点.2）KRK26的产量为3 187.5 kg/hm^2,产值为50 426元/hm^2,均价为15.82元/kg,级指为74.62,产指为2 378.6,上等烟比例61.51%,极显著高于K326,与云烟87相当;而其余3个津巴布韦品种的经济性状,与K326相当,但极显著低于云烟87.3）KRK26烟叶的氧化钾含量（质量分数）2.58%最高,两糖差5.08最小,总糖、烟碱及其比值均在适宜范围内,且其余3个津巴布韦品种也表现出糖含量较低,钾含量较高等特点.