装备全寿命管理看航材综合保障

本文针对现行航材保障工作遇到的问题,将全寿命管理引入到航材保障工作中,并与现行航材保障工作进行比较,使飞机在使用阶段能以最小的经济投入,获得最佳的航材保障率、合理的保障资源,切实提高我们的装备保障水平.     

Pilot Scale Test to Treat High Concentration Gasification Wastewater Using Catalytic Oxidation and Aerobic Biological Fluid-Bed Combination Process

The gasification wastewater is a kind of typical organic industrial wastewater with high chemical oxygen demand （COD） and ammonia nitrogen, which could not be completely degraded by the traditional physical, chemical and biological method. So it is very important to find an effective treatment process. A combination process of catalytic oxidation with noble metal catalysts and aerobic biological fluid-bed packed with the new ultrastructure biological carriers, which was developed by ourselves, was investigated to treat the gasification wastewater. The pilot scale test with 0.5 m^3/h influent flow was carried out to investigate the performance of this new combination process. The results showed that the effluent COD was 84.02 mg/L, ammonia nitrogen was 14.15 mg/L, and total phenol was 0.20 mg/L, which could completely meet the Grade I of Wastewater Discharge Standard （GB8978-1996）, when the influent average COD was 5 564 mg/L, ammonia nitrogen was 237 mg/L, and total phenol was 1 100 mg/L. The two catalytic reactors could evidently improve the wastewater biodegradability, and the value of BOD5/COD （B/C） increased from 0.23 to 0.413 in the one-stage catalytic reactor and from 0. 273 to 0.421 in two-stage catalytic reactor. The further experiment results showed that the effluent quality of this new combination process could still meet the discharge standard, when the COD loading was 8.65 kg / （m^3· d）. Most of aromatic and heterocyclic compounds were degraded effectively in this combination process.     

基于地磁的自主定轨方法研究

本文着重从国内外地磁自主导航的研究现状出发,阐述了利用地磁场实现自主导航的技术原理和一般方法,并针对国内研究而言提出可能的发展方向,希望为国内自主导航技术的研究提供支持和帮助。     

基于贝叶斯随机评价方法的洪水灾情等级评价

为了提高洪水灾情评估的准确性,应用贝叶斯随机评价方法,以受灾面积、受灾人口数、破坏房屋面积和经济损失作为评价因子,提出了基于贝叶斯随机评价方法的洪水灾情等级评价方法。该方法通过计算洪水灾情的单个指标属于某个评价级别的概率,由最大似然分类原则确定单个灾情指标的评价级别,进而采用最大加权概率原则推求其综合评价级别。通过实例分析得出的评价结果同灰色关联法、灰色聚类法、PCNN网络模型的评价结果进行了比较,表明其用于洪水灾情综合评价具有科学性和有效性。     

浅谈基于WEB的交互式教学系统设计与实现

网络技术的飞速发展为许多新兴领域的建立开辟了广阔的前景,网络教育就是近几年迅猛崛起的一员。网络为人们提供了全新的交流、学习方式和机会,网络教学的产生加剧了对传统教育变革的要求,也促使现代教育走向网络化。越来越多的研究表明,基于WEB的交互式教学是网络教学的一种有效教学形式,相比其他网络教学形式更能产生良好的学习效果,同时也是网络教学发展的方向。本文介绍了如何构建这种交互式远程教学系统,并将WEB技术运用到教学系统的设计与实现。     

刍议市政道路施工中石灰土路拌法施工工艺控制

石灰土作为市政道路工程中的重要材料之一,有着很多明显的优点,其初期稳定性、随龄期增长的强度、板结性、水稳定性等等都受青睐,因此,在市政道路施工中被广泛应_用.石灰土施工工艺控制和石灰土性状、拌和均匀性等对其性质都会产生很大影响.所以,研究石灰土的施工工艺对提高工程质量具有重要意义.     

高职院校学前卫生学实训室思考与建设

学前卫生学是学前教育教育专业的一门专业基础课,实践操作往往是该学科教学中的薄弱环节。文章以中等师范学校升格的高职院校为例,探讨如何充分利用中等师范学校原有资源建设一个既满足课程教学要求又贴近实际工作环境的学前卫生实训室。     

不同头型回转体低速倾斜入水过程流场特性数值模拟

基于有限体积法和VOF多相流模型求解气、水两相流动的RANS方程,结合动网格技术,对回转体低速倾斜入水过程进行数值模拟研究.通过将数值计算结果与试验数据进行比较,验证了数值计算方法的有效性.基于该方法对不同头型回转体低速倾斜入水过程进行分析,得到不同头型条件下回转体入水空泡形态发展规律、回转体运动特性及流体动力特性变化规律.研究结果表明:同一入水深度,入水空泡直径和流场中最小压力值随着回转体头部锥角的增加而增大;不同头型回转体,锥头母线同一位置处压力随着头部锥角的增加而增大;回转体阻力系数与其头部锥角大小直接相关,锥角较大时,阻力系数也较大,速度衰减也较快.      

Research on the Geometry and Microstructure of the Coir Fiber

Coir fiber is derived from the coconut shells and considered to be an economical and natural material. In order to further extend its application fields,the geometry and microstructure of the coir fiber were thoroughly investigated in this research. The single fiber length measurement was carried out,and it was revealed that the length of the coir fiber was between 8 and 337 mm. Length distribution of the coir fiber was simulated by using the computer technology,and was found to be in coincidence with that ...     

百色盆地东部坳陷北部陡坡带那读组油气成藏条件

通过对百色盆地东部坳陷北部陡坡带主力产层那读组油气成藏条件的研究,认为:盆地内主力烃源层那读组烃源岩有机碳含量低,且有机质的烃转化率较小,生烃潜力较低,油气远景较差;储层非均质性强且储集空间有限;圈闭类型复杂多样且圈闭面积较小;油气生成量少而运移和聚集方式繁多,油气呈散射状分布.百色盆地为典型的残留盆地,盆地形成后遭受了非常强烈的抬升剥蚀,破坏了盆内的油气盖层,并且由此引起的地层孔隙压力释放和油气的散失,断层更多充当油气运移通道的角色,大部分油气逸散到地表,保存条件差.百色盆地现今仅能存在少量而分散的残留油气藏,油气勘探前景不容乐观.