聚合物合成及成型加工中协同学的应用

综述了协同学在聚合物领域的最新研究进展，介绍了加工制备一些聚合物合成及复合材料所显示出的协同效应，以及用协同学方法定量求解一类合成反应体系的动力学模型。提出通过改变振动力场等作用方式，在聚合物动态塑化成型加工时，协同学方法具有广阔的应用前景。     

光学镜头调制传递函数的测试

为了定量、客观、全面地评价光学镜头的像质,介绍了光学镜头调制传递函数的测试。先简要叙述了测试的原理,并给出计算公式;然后介绍了测试步骤,其中包括固定、穿轴、测试中心视场和测试轴外视场;最后介绍了测试时的注意事项,包括对测试工装的要求、对测试平面的要求和正、负轴外视场测试值相差较大时的处理办法。     

数字化煤场与配煤掺烧技术的实施要点初论

优化配置不同种类、不同性质的煤炭,将其掺配成在综合性能上呈最佳状态的新煤种,满足锅炉在不同条件下的各种需要;开发数字化煤场,实现煤场的数字化动态管理。主要分析、研究了数字化煤场和配煤掺烧技术的实施要点。     

降低电石生产能耗的途径

介绍了新疆天业股份有限公司的下属子公司的25万t/a电石生产系统投运情况,对降低能耗、减轻操作人员的劳动强度、保证安全生产、提高产品质量与产量等,以及对原材料、工艺操作、设备等,都进行了分析。     

浸入式水口燃烧式烘烤预热温度场研究

浸入式水口在浇钢以前必须进行充分预热 ,利用燃烧的煤气烘烤水口是常用的预热烘烤方式。本工作运用有限元技术对浸入式水口燃烧式烘烤预热的瞬态传热过程进行了研究 ,得到了水口烘烤预热后的温度场分布和水口的升温曲线。研究结果表明 ,在燃烧式预热烘烤方式下 ,水口沿轴线方向的温度变化梯度较大 ,水口颈部预热后的温度较低 ,是导致水口颈部频繁断裂和较易出现竹节样裂纹的主要原因。欲提高水口颈部的预热温度 ,必须改进水口的预热烘烤方式     

基于CloudStack的旅行社电子商务解决方案

对国内旅行社开展电子商务面临的问题进行分析,提出一种基于开源云平台的旅行社电子商务创新模式。该模式并不是云计算加电子商务的简单叠加,而是在成熟度最高的开源云平台CloudStack的基础上,设计出能对异构云平台进行整合的整合开发云,进而构建出旅行社电子商务公共服务平台,实现对平台内外的旅行社上游产品资源以及下游的客户信息的整合,旅行社可以根据自身的需求选择不同的商业模式,从而获取到高质量、低成本的电子商务服务,达到改进整个旅游产业运行体系和生态环境的目的。     

“网络营销”课程改革实施方案

"网络营销"课程知识体系须随着互联网应用的出现和普及而逐渐得到完善,为此提出了该课程的教学改革实施方案。网络营销课程的教学始终要以实践应用为主导,在教学过程中采用案例教学、任务驱动、结合竞赛、学科互动、团队合作等方法。考核应采用灵活分配学分比例的办法。最终使得学生能够将课堂上的知识灵活地运用到工作当中。     

Preparation of phenolic resin derived 3-D ordered macroporous carbon

Three-dimensionally ordered long-range macroporous carbon structures were prepared using commercially available phenolic resin by utilizing sacrificial colloidal silica crystalline arrays as templates that were subsequently removed by HF etching after pyrolysis in an argon atmosphere. SEM, TEM, and BET were employed to characterize the morphology and the surface area of the porous carbon structures. The pore size (150–1000 nm) and BET surface area, which reflect pore volume (298.6 m²/g (1.32 cm³/g) ∼ 93.7 m²/g (0.12 cm³/g)), of the macroporous carbon structures produced were approximately proportional to the size (150–1000 nm) of the sacrificial silica sphere templates used (annealing temp. 550°C). The achieved 550 nm porous carbon structures were examined to function as potential catalyst carriers and were successfully impregnated with Ag or Pt-Ru on their inner walls after borohydride reduction at room temperature. In addition, porous carbon patterns were fabricated using the ‘micromolding in capillary’ technique, which has potential applications in the microreaction technology.     

化学清防蜡剂在百色油田的应用

百色油田原油含蜡量高达35%,油井结蜡严重,经实验筛选出的化学清防蜡剂JS_2应用于近70口井,除一井温过低(44℃)外,均获得明显效果.     

In situ formation and compounding of polyamide 12 by reactive extrusion

The anionic polymerization of lauryllactam was initiated at 270°C using sodium hydride as an initiator and N,N′‐ethylene‐bisstearamide (EBS) as an activator (NaH:EBS molar ratio of 2). Polymerization occurred in less than 2 min and was successfully performed in an internal mixer and a twin‐screw extruder with corotating intermeshing screws (Werner & Pfleiderer ZSK 25). The content of residual monomer, as determined by thermogravimetric analysis, was lower than 0.5 wt %. Molecular weight, as measured by size exclusion chromatography, was governed by the lauryllactam:NaH molar ratio calculated on a M_n of 25 kg/mol at a constant NaH:EBS molar ratio of 2. Blends were prepared in situ by polymerization of lauryllactam solutions of various polymers. When poly(ethylene‐co‐butylacrylate) (Lotryl®; Atofina) was dissolved in lauryllactam, rubber‐toughened polyamide 12 blends were obtained. Mechanical properties of the injection‐molded polymers were examined by stress–strain as well as notched Charpy impact tests at different temperatures. Blend morphologies were imaged by scanning electron microscopy (SEM). © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 344–351, 2003