中职校园物质文化建设实践研究

校园文化是学校精神文化和物质文化的集中体现。校园文化是以学生为主体,以校园为主要空间,并涵盖学校领导、教职工,以育人为主要导向,以精神文化、环境文化、行为文化和制度文化建设等为主要内容,以校园精神、文明为主要特征的一种群体文化。本文试就新形势下如何创新中等职业学校校园文化建设作一探讨。     

工程建设与设计

正《工程建设与设计》杂志以设计师、工程建设人员、管理人员为主要读者对象,以介绍先进设计技术和行业信息为主要内容,以工程建设项目实施全过程优化为宗旨,是工程设计行业内一个新闻报道、论文发布的重要平台,也是设计单位对外宣传的主要窗口,同时为技术人员职称评定提供依据。     

青岛香格里拉大饭店（二期）

酒店位于青岛市市南区的核心地段,总建筑面积120 000m^2,260间客房。分2个塔楼,1号塔楼为29层,主要为办公及公寓式酒店,2号塔楼20层,主要为酒店客房,4层裙房主要为酒店餐饮、会议、娱乐等附属配套设施,3层地下室主要为车库。建成后已经成为青岛市地标式的五星级酒店建筑。     

农村公路工程沥青挖补施工技术要点之研究

主要以农村公路工程沥青挖补施工技术为重点进行分析,结合当下工程概况为主要依据,从路面清理、乳化沥青的摊铺、混合料制备的质量控制、运输过程的控制、路面施工、施工缝的处理方法、检测路面指标几方面进行深入探索与研究,主要目的在于增强农村公路质量,为群众安全出行提供保障。     

固封极柱APG工艺材料制备工艺

浇注这一广义词中,可分为浇注、包封、灌封以及自动压力凝胶、真空自动压力凝胶工艺等环氧树脂成型工艺,目前国内外固封极柱的生产主要采用的为APG工艺,即环氧树脂自动压力凝胶成型工艺。固封极柱APG工艺浇注生产原材料主要为环氧树脂、固化剂、填料及色粉。其中环氧树脂主要以双酚型环氧树脂为主,常用的固化剂为酸酐类固化剂。常用填料主要有硅微粉、氧化铝、氢氧化铝等,固封极柱APG工艺生产的填料主要为硅微粉。加入填料可提高环氧树脂浇注件的耐磨性、导热性、硬度和耐化学腐蚀性,并可降低浇注件的收缩率,增加尺寸稳定性。     

中老铁路主要技术标准的选择

以中老铁路为例,介绍客货混运铁路主要技术标准确定的主要原则以及应注意的问题,以运量为依据,以效益为原则,结合运输特点,与相邻铁路协调一致、相互匹配来综合选择中老铁路主要技术标准。     

基于主成分分析的松花江流域黑龙江段水质评价

对松花江流域黑龙江控制区段13个监测断面不同水期的水质指标进行主成分分析,以鉴别主要的污染源,进而提出有针对性的水污染控制对策。结果表明,BOD5、COD、TP、TN为主要污染指标,合计贡献率为49. 529%,首要污染源为生活污水与农业废水。第二大污染指标主要为石油类、阴离子表面活性剂、氰化物,主要来源于工业废水。总污染最严重的主要是阿什河口内平水期与龙安桥平水期。龙安桥平水期等对应的河流区段受生活污水及农业废水污染较为严重,苗家平水期等对应的河流区段受工业污染较为严重。     

天津市主要水体的氮污染特征分析

以天津市引滦河道、于桥水库及14条主要地表河流的氮营养盐监测结果为依据,研究了天津市主要水体的氮污染水平、特征、变化规律及主要来源.结果表明,天津市主要水体中氮营养盐的主要组成为溶解态无机氮.14条主要河流的TN年均浓度在1.45～11.7 mg/L之间,均值为4.16 mg/L; NH4+-N年均浓度在0.057～8.54 mg/L之间,均值为2.48 mg/L; N03--N年均浓度在0.04～3.56 mg/L之间,均值为0.908 mg/L.其中,7条河流的氮污染主要来源于点源贡献,1条河流的氮污染主要来源于周边非点源贡献,4条河流同时受点源和非点源污染影响,2条河流的氮污染主要来源于上游来水.于桥水库的TN年均值为1.90 mg/L,且呈逐年显著上升的趋势;总体上看其氮污染主要来源于非汛期的引滦输水,但农田径流、农村生活污水以及畜禽养殖废水等非点源污染对于桥水库的影响仍不容忽视.     

维吾尔族庭院经济发展模式研究

早期维吾尔族庭院经济主要是以农牧业生产为主要内容,从维吾尔农村生存方式逐步演变成了一种基本生活方式。近代维吾尔族庭院经济作为维吾尔族主要的经济活动方式,覆盖了农牧业、手工业、商业、服务业为主题的各个领域。成为了维吾尔族社会的主要生产和财富源泉。到了当代,由于丝绸之路经济辐射作用的衰竭,庭院经济又回归到了最早期的谋生手段和农牧业为主的小手工业。本文主要简明阐述该经济活动的内涵,基本形态,基本形态成因及主要特点。     

基于逻辑回归和因子分析的器官捐献意愿度研究

针对器官捐献意愿度的影响因素问题,应用相关分析、列联表分析方法,建立二项逻辑回归模型、因子分析模型,利用SPSS软件,得出影响公众器官捐献意愿度的主要因素。从公众基本信息出发,主要影响因素为年龄、文化程度;从社会存在的客观问题出发,主要影响因子为观念因子、信息因子、素质因子。最后基于研究结果为我国器官捐献事业的发展提出了有效建议。     

Experimental investigation of the solar cooker during sunshine and off-sunshine hours using the thermal energy storage unit based on a parabolic trough collector

A solar cooker based on a parabolic trough collector with thermal energy storage (TES) was investigated. In this experimental set-up, solar radiations were focused on the absorber tube and the collected heat was transferred to the solar cooker by natural circulation (thermosiphon) of the working fluid. The water and thermal oil (engine oil) were used separately as working fluids. Acetanilide was used as the TES material in the solar cooker. In day time, the phase change material (PCM) stored heat as well as transferred it to the cooking pot. In evening time, the stored energy by PCM was used to cook the food. The cooking process was carried out with different foods and with variation in the quantity of food. It was found that the temperature of thermal oil was 10–24°C higher than water as the working fluid. The system was able to cook the food twice a day and the rate of evening cooking was higher as compared with noon cooking. Using thermal oil as the working fluid, the quantity of heat stored by PCM was increased by an amount of 19.45–30.38% as compared with water.     

水性薄型钢结构防火涂料的研制

以改性丙烯酸乳液为成膜物质,聚磷酸铵为阻燃剂,季戌四醇为炭化剂,三聚氰胺、氯化石蜡和可膨胀石墨为发泡剂,配以适量的增强剂和填料制备的水性薄型钢结构防火涂料,在涂层厚度为3.0mm时,耐火极限为1.0h,粘结强度为1.08MPa。     

竖井地基固结概率分析的点估计法

将竖井地基固结度表达式直接作为功能函数,采用点估计法计算固结度的均值、标准差等各阶统计矩,由各阶统计矩可方便计算出竖井地基达到某一固结度的概率。与传统概率分析方法相比,如一次二阶矩法,点估计方法无须事先引入控制指标来建立极限状态方程,计算过程更为简便。实例分析表明,当估计点较多时(如5点),点估计方法具有较高的计算精度,与Monte Carlo法相当,是一种简便而不失精度的概率分析方法,适合工程实际应用。     

低模量单组分硅烷封端聚氨酯密封胶的研制

采用自制硅烷封端聚氨酯预聚体、邻苯二甲酸二异壬酯（DINP）增塑剂、聚酰胺蜡触变剂、活性轻质碳酸钙填料为主要原料,制备了一种低模量单组分硅烷封端聚氨酯密封胶,并讨论了上述几种原料的用量对密封胶性能的影响,给出了该密封胶的最佳配方.     

TiO2改性多功能涂料的制备及性能研究

将实验室自制的纳米TiO2添加于丙烯酸-有机硅乳液中,利用TiO2的光催化活性,制成多功能涂料。实验结果表明,该涂料具有抗污自洁净、抗菌防霉等功能,光催化作用持久,抗光氧化能力良好。     

防火分隔及排烟措施对综合管廊电缆火灾烟气蔓延的影响

以某综合管廊为研究背景,利用PyroSim 模拟软件建立的仿真计算模型,研究了设立挡烟垂壁、改变防火门开启程度、增设排烟设施等情况下的烟气蔓延规律。研究发现：在烟气未充满管廊时,挡烟垂壁会使烟气蔓延速度降低,烟气蔓延速度与挡烟垂壁高度成反比;防火门打开会使火灾烟气蔓延至相邻防火分区,烟气蔓延速率与防火门开启程度成正相关;机械排烟设施会使烟气蔓延速度显著降低,最高降低约50%,当烟气完全充满整个管廊时,会显著降低综合管廊内烟气浓度,烟气层温度最高降幅32 ℃,能见度最高增加了66%。通过对综合管廊内烟气蔓延的研究,探寻防治综合管廊烟气蔓延的最佳措施,为综合管廊烟气防治的实际工程应用提供参考。     

高层钢管混凝土结构施工全过程数值模拟

基于CEB-FIP MC90的混凝土时变模型,建立了按主从节点约束考虑钢管与混凝土共同工作的钢管混凝土时变分析模型,提出了高层钢管混凝土结构施工全过程的数值模拟方法.对某高层钢管混凝土结构进行了数值计算,计算中考虑了混凝土的收缩徐变效应和施工工序影响,与施工过程的监测结果做了对比分析.研究表明,施工过程和收缩徐变对高层钢管混凝土结构影响很大,实际结构在设计和施工中必须予以考虑.     

Investigating synergism during sequential inactivation of Bacillus subtilis spores with several disinfectants

The sequential application of ozone, chlorine dioxide, or UV followed by free chlorine was performed to investigate the synergistic inactivation of Bacillus subtilis spores. The greatest synergism was observed when chlorine dioxide was used as a primary disinfectant followed by secondary disinfection with free chlorine. A lesser synergistic effect was observed when ozone was used as the primary disinfectant, but no synergism was observed when UV was used as the primary disinfectant. When free chlorine was used as the primary disinfectant (i.e., sequential application in the reverse order), the synergistic effect was shown only when chlorine dioxide was applied as the secondary disinfectant. The synergistic effect observed could be related to damage to the spore coat during primary disinfection, suggested by the loss of proteins from spores during disinfectant treatment. The greatest synergism observed by the chlorine dioxide/free chlorine pair suggested that common reaction sites might exist for these disinfectants. The concept of percent synergistic effect was introduced to quantitatively compare the extent of synergistic effects in the sequential disinfection processes.     

Damage analysis of an RC column subjected to long-term transient elevated temperature

Damage in a reinforced concrete column subjected to long-term elevated temperature (approximately 150°C) was studied by conducting detail inspection as well as finite element analysis. The damage information was collected through visual inspection, non-destructive tests, coring, and chemical analysis. Inspection results illustrated more damage level in the portion exposed to high temperature. Chemical analysis as well as cracking patterns indicated that the damage was not the same as the damage caused by fire attack and was not caused by chloride penetration, carbonation or sulphate attack. The mechanism of the damage was clarified by using finite element analysis with a condition of sudden drop of surface temperature. It was found from the analysis that cracking can be induced on the surface of the column due to temperature gradient if there is a substantial surface temperature drop.     

HDPE土工膜的温度应力研究

对HDPE土工膜的弹性模量、线膨胀系数和温度的关系以及温度应力进行了研究,通过大规模试验得到了温度应力随温度变化的规律,结果表明计算值与试验值基本一致.