语文综合性学习主题发掘与设计的有效策略

在语文综合性学习中,主题是活动的灵魂。教师应激发学生的学习兴趣和问题意识,把这些兴趣和问题提升为有意义、有价值的主题,为综合性学习提供明确的指向。以课文为生发点进行拓展、以生活为资源进行提取、以学科为纽带进行提炼、以地方文化为资源进行归类、探究等形式,发掘语文综合性学习主题。     

浅谈中职语文教学中的德育渗透

中职校培育学生道德品质除德育课这一载体以外,还有文化课与专业课及校园文化等载体。语文教师应以语文课堂为主阵地对学生进行道德教育,潜移默化地培养学生的情感、态度、价值观。路径有:以文章作者为样板进行德育渗透;以文中人物为榜样进行德育渗透;以文中经典语句为座右铭进行德育渗透;以文章主旨为终极场进行德育渗透。     

《数字电子技术》课程内容和教学方法的探究与改革

针对《数字电子技术》课程的教学内容与方法进行探究,从理论与实验课程两方面对教学内容进行选取与整合,根据"以需求为出发点、以兴趣为切入点、以互联网为着力点、以考核为关键点"的改革理念对教学方式进行调整。     

反馈控制原理在高校就业工作中的应用研究——以内蒙古科技大学信息工程学院为例

文章以内蒙古科技大学信息工程学院为例,运用反馈控制原理进行就业工作应用研究,通过对就业评估进行全方位把控,提前预判、过程监控、效果反馈多管齐下,在决策中对措施、政策和方法进行控制调节,以期实现以政策促进管理、以管理促进就业、以就业反馈政策制定的良性循环。     

教学设计:有效教学的关键

教学设计作为联系教学理论与实践的"桥梁",以促进学生进步与发展为宗旨,以分析学生的学习需要,确定教学目标为设计的起点,以对教学任务、学生进行周密分析并提出有效教学方案为设计的任务,以合理选择教学方法、恰当运用教学媒体、灵活制定教学策略为设计的手段,以对教学进行客观科学的评价与反思来进行监控与调节,以达到教师教学素养与有效教学的双赢为归宿。科学合理地进行教学设计是有效教学的关键。     

以课例教学设计研究为载体优化《建筑给水排水工程》课堂教学

通过对《建筑给水排水工程》课程课例教学设计进行研究,从教学先导、教学主体、教学内容、教学效果四要素进行课例教学设计,真正体现“以师为源、以生为本、以知为创、以的为新”的课例教学设计,优化《建筑给水排水工程》课堂教学。     

强化大学生关键能力培养的教学设计优化探索——以《动力气象学》为例

本文以大气科学类本科生专业主干课程《动力气象学》为例,就如何进行教学设计优化以强化培养本科生关键能力进行了初步探讨。教师要深入解读课程教学大纲,掌握所教授课程的特点和教学目标,在此基础上,以学生为主体、以教师为主导,在教学内容、教学方法、教学技术、教学环境和教学评价这五方面进行优化,根据教学效果进行反思和修改。     

西方“以火喻教”思想及其根源

“以火喻教”是西方思想家的重要言说方式。西方“以火喻教”思想主要包括以火喻教、以火喻师、以火喻学。善于从观火、用火、爱火中对教育进行言说,是西方思想家的重要方法论。对其根源进行探析,城邦民主、火崇拜分别构成了西方“以火喻教”思想的政治根源、文化根源。“以火喻教”思想极具西方文化特色。     

当代大学生思想政治教育的新思路

当代大学生思想政治教育要做到以马克思主义中国化的理论成果为主要内容,深入进行马克思主义理论教育;以理想信念教育为核心,深入进行世界观、人生观和价值观教育;以爱国主义教育为重点,深入进行民族精神和时代精神教育;以社会主义荣辱观为核心,深入进行社会主义核心价值教育。     

诈骗手段分类界定研究

以参考各国具体刑事立法为例为起点,认为在各国立法中,诈骗手段一般划分为以事实进行的欺诈和以价值进行的欺诈两大类型。对以事实进行的欺诈进行讨论时,又将焦点集中在对事实概念的内涵及外延理解上。从理论上简析了以事实进行欺诈、以价值进行欺诈的问题,分析了诈骗手段中认识错误和主观心态等问题,通过处分意识与主次分析之对比考量,推出认定侵犯财产罪此罪与彼罪的本质时,犯罪手段是关键之所在。     

毛细管气相色谱监测空气中苯、甲苯和二甲苯

用活性炭吸附-CS2(溶剂)解吸气相色谱法监测室内空气中苯、甲苯和二甲苯。对“居住区大气中苯、甲苯和二甲苯卫生检验标准方法-气相色谱法”(GB11737-89)进行了改进，并对改进方法的灵敏度、精确度、准确度、稳定性等进行了测试，结果表明该方法的主要技术指标符合室内环境空气监测的要求。     

扁担杆正丁醇提取物的抗炎镇痛作用

应用化学方法制备扁担杆正丁醇提取物。采用热板法观察提取物对小鼠的镇痛作用,用二甲苯致小鼠耳郭肿胀法观察其抗炎作用。结果显示高浓度扁担杆正丁醇提取物有明显镇痛作用,并且能明显抑制二甲苯引起的小鼠耳郭肿胀。     

糖基修饰磁性材料制备及对芳香烃吸附性能的比较

采用共沉淀法制备Fe3O4微粒,后用四乙氧基硅烷（TEOS）将其表面包覆SiO2,得到Fe3O4/SiO2,分别在Fe3O4粒子和Fe3O4/SiO2粒子上键合葡萄糖和蔗糖,得到四种复合磁性材料：Fe3O4-葡萄糖（F-G）、Fe3O4-蔗糖（F-S）、Fe3O4/SiO2-葡萄糖（F-S-G）、Fe3O4/SiO2-蔗糖（F-S-S）。合成材料用IR进行表征,结果表明,蔗糖和葡萄糖已成功修饰。以甲苯、二甲苯、苯乙烯的混合溶液为目标物,考察四种材料对芳香烃类化合物吸附性能,实验表明,四种材料均有较好的的吸附效果,其中F-S和F-S-G吸附性能尤佳。     

Mortality weighting-based method for aggregate urban air risk assessment

This paper deals with a mortality-weighted synthetic evaluation (MWSE) method for evaluating urban air risk. Sulphur dioxide (SO₂), nitrogen oxide (NO _x ), and particulate matter (PM₁₀) were used as pollution indices. The urban area of Hangzhou, China is divided into 756 grid cells, with a resolution of 1 km×1 km, and is evaluated using the MWSE and the air quality index (AQI), a widely-used method to evaluate ambient air quality and air risk. In an evaluation of one day in April 2004, the surface areas categorized as levels I and III, as defined by the integrated air risk evaluation, were 27.3% and 3.3% lower, respectively, than grades I and III defined by the AQI evaluation. Meanwhile, the areas classified as level II or above level III by the integrated air risk evaluation were 55.1% and 101.1% higher, respectively, than grade II or above grade III when using the AQI evaluation. From this comparison, we find that the MWSE method is more sensitive than the AQI method. The AQI method uses a single index to assess integrated air quality and is therefore unable to evaluate integrated air risks due to multiple pollutants. The MWSE method overcomes this problem, providing improved accuracy in air risk assessment.     

固定化细胞滤床和生物膜滤床净化二甲苯的比较

The Bacillus firmus was immobilized into Ca-alginate beads according to the different initial biomass concentration, calcification time and activation time.Three types of immobilized Bacillus firmus beads were packed respectively in trickling biofilter to purify xylene contained waste gases,and the performance of immobilized-cell biofilter was compared with traditional biofilm attached biofilter packed with two types of ceramic pellets.The results showed that three types of immobilized beads had different capabilities for removing xylene and life-spans.Higher initial biomass in immobilized beads resulted in better performance but shorter life-span.Activation process can remarkably enhance the activity of bacteria,and the removal efficiency of xylene can substantially be improved.Calcification time had influence on life-span of immobilized beads.Without acclimation,the cell-entrapped biofilter can obtain the maximum elimination capacity of 92.4 g/(m~3·h).However,compared with biofilm attached biofilter,it has a poorer intrinsic drawback in volatile organic compounds (VOCs) removal due to the existence of excess mass transfer resistance.     

Method for determining effective flame emissivity in a rotary kiln incinerator burning solid waste

Temperature is the most important parameter for the improvement of combustion efficiency and the control of pollutants. In order to obtain accurate flame temperatures in a rotary kiln incinerator using non-intrusive thermographic method, the effective flame emissivity was studied. A combined narrow- and wide-band model and Mie scattering method were used to calculate the radiative properties for gases and fly-ash particles under different combustion conditions. The effects of the air/waste ratio and fly-ash particles on the effective flame emissivity were discussed. The results of numerical calculations showed that the effective emissivity decreased from 0.90 to 0.80 when the air/waste ratio increased from 1.0 to 1.8, and the effect of the fly-ash particles was ignorable under the conditions discussed in this paper. Experimental measurement results indicated that the accuracy of the thermographic temperature measurements improved significantly if the setting of the flame emissivity was adjusted according to the air/waste ratio.     

气相色谱法测定硬脂酸甲酯催化加氢产物中十八醇的含量

建立了气相色谱法测定硬脂酸甲酯催化加氢产物中十八醇含量的方法,从而能够简便地对实验室合成十八醇方法的可行性及有效性进行评估.考察了氢气压强、载气压强、空气压强和色谱柱温度等因素对硬脂酸甲酯催化加氢产物分离分析的影响.选定的最佳分离条件为：氢气压强为0.08 MPa,载气（N2）压强为0.18 MPa,空气压强为0.1 MPa,色谱柱温度为205℃.在这种条件下,十八醇能够在5 min得到分离检测.最终测得实验室采用的两种不同合成条件下产物1和2中十八醇的含量分别为8.7%和30.1%.结果表明,合成条件2优于合成条件1,但仍需改进以提高十八醇的产率.     

Screening study of transition metal oxide catalysts supported on ceria-modified titania for catalytic oxidation of toluene

Six transition metal oxides were added in ceria-modified titania using a sol-gel method for catalytic oxidation of toluene. An MnOx based catalyst was found to be the most active one, with which toluene could be decomposed completely at 200 °C. The greatest Mn/Ti and molar ratio of the mobile oxygen to the total oxygen concentration, together with a large surface area and a low reduction peak-starting temperature, would result in its best activity in toluene oxidation.     

LNG接收站空压制氮系统联合设计

将LNG接收站中空压系统和制氮系统联合设计,由3台空压机（2开1备）向整个系统供气,3台空压机均采用无油螺杆空压机,其中1台常开空压机采用变频技术。通过流程优化及采用新技术,联合设计不仅能提高整个空压制氮系统的安全性,设备易于维修和保养,而且降低设备的运行费用。     

Modifi cation of Natural Rubber Latex by Graft Copolymerization of 2-Ethylhexyl Acrylate and Methacrylic Acid

Natural rubber(NR) grafted with 2-ethylhexyl acrylate(2-EHA) and methacrylic acid(MAA, collectively NR-g-PEHA/MAA) was synthesized by emulsion polymerization. Tetraethylenepentamine and cumene hydroperoxide were used as redox initiators. The successful grafting of 2-EHA and MAA onto NR was confi rmed by Fourier transform infrared spectroscopy. The morphology of the NR latex particles was observed by transmission electron microscopy. The eff ects of reaction temperature, initiator dosage, feeding mode, and hard monomer content on the mechanical properties of the modifi ed NR fi lm were investigated. Grafted polymer chains were unevenly wrapped on the outside of NR particles, and smaller particles were more easily grafted. Crosslinking was characterized using a toluene swelling method. Thermal stability and glass transition temperature were examined by diff erential scanning calorimetry and thermogravimetric analysis. The results showed that the thermal stability of NR-g-PEHA/MAA had been improved, and the glass transition temperature(T_g) was unchanged.