文控室管理

在信息时代,信息化管理的作用非常重大。首先从信息化的定义认识信息化管理,并阐述了菲林信息化管理的必要性。接着从文控室确保资料的唯一性的具体做法及好处谈论菲林信息化管理的必要性。     

Synthesis and properties of PDMS modified waterborne polyurethane–acrylic hybrid emulsion by solvent-free method

A new type of polysiloxane modified polyurethane–acrylic hybrid emulsion was synthesized by solvent-free method and the polysiloxane was introduced into the soft segment of polyurethane chains using dihydroxybutyl-terminated polydimethylsiloxane (PDMS). The formed film from the hybrid emulsion could provide obviously higher water-resistance property. The preparation technologies such as the content of carboxy group and acrylic monomer, the rate and the time of emulsification were discussed systematically. The chain structure and the particle size were confirmed by the analysis of Fourier transform infrared spectroscopy and transmission electron microscopy, respectively. The effect of PDMS content on the water resistance and the mechanical property were investigated by absorbed water ratio, water contact angle and dynamic mechanical measurement.     

脉冲电镀的正向电流密度对深镀能力的影响

主要通过在正反向电流比、频率、脉冲宽度一定的条件下,改变正向电流密度的大小来研究其对PCB整板电镀铜深镀能力的影响。从测得的数据可知随着正向电流密度的增大,深镀能力先变大后变小,并对这个问题进行了理论分析。     

Array公司SSL VPN夺标中石油

石油业在信息化系统建设方面一直着眼于提高效率,希望无缝满足当前和未来的业务拓展需要。其业务不断拓展和多元化,要求信息系统整体提供更高的访问,必须为勘探和生产活动的顺利进行提供全面的保障。无论从地理特性还是业务拓展的需求上,石油行业都需要高效的应用访问能力,避免     

Phase Transformation Introduced by Mechanical and Chemical Surface Preparations of Tetragonal Zirconia Polycrystals

Cutting of Y₂O₃-doped TZP rods by a low-speed diamond saw introduces an unidentified, metastable phase X (x -ZrO₂) coexisting with the tetragonal ( t -ZrO₂) and the monoclinic ( m -ZrO₂) phases initially present in the sample. Further mechanical deformation of the cut surface by indentation or polishing sustains the x -ZrO₂. Chemical etching removes the x -ZrO₂ and increases the m -ZrO₂content.     

Glutamine dipeptide attenuate mucosal atrophic changes and preservation of gut barrier function following 5-FU intervention

Traditional parenteral nutrition (PN) and chemotherapy may lead to changes mucosal morphology and gut barrier function. To investigate the effects of alanyl-glutamine on intestinal mucosal morphology and gut barrier function in PN-fed rats challenged with 5-FU male Wistar rats were central catheterized and randomily divided into two groups: PN group (n = 10) that received traditional parenteral nutrition solution only, and Ala-Gln group (n = 10) that received glutamine dipeptide enriched nutritional solution (3% Ala-Gln). The rats were maintained on their respective diets for 7 days. 5-FU (75 mg/kg) was injected intraperitoneally at 8 am on day 4. All rats were gavaged with lactulose (100 mg) and mannitol (50 mg) in 2ml before and three days after administration of 5-FU. Ala-Gln group maintained serum glutamine concentration, intestinal mucosal morphology. While bacterial translocation rates in ala-Gln group was 30%, in PN group was 90% (P < 0.05). Similar intestinal permeability was observed on day 3 in both groups. The control group had a significantly increased intestinal permeability on day 7 (P < 0.05), while Ala-Gln group maintained the intestinal permeability. It was suggested that alanyl-glutamine maintained intestinal morphology and gut barrier function in PN-fed rats challenged with 5-FU.     

添加微量锡对铜基摩擦材料性能的影响

研究了添加微量锡对铜基摩擦的摩擦性能的影响。结果表明，微量锡对摩擦系数无显著影响，但对磨损有显著影响，当锡含量为０．５０％时，摩擦材料及对偶材料的磨损都较小。     

双马来酰亚胺基体树脂的改性研究

本文报道用改性物B改善双马来酰亚胺/二胺预聚物溶解性的实验研究.结果表明,改性后的双马来酰亚胺/二胺基体树脂在低沸点、低毒性溶剂如丙酮中具有良好的溶解性,并且有足够的均相期,为湿法制作预浸料创造了有利条件.同时对树脂的固化反应、耐热稳定性及其复合材料在高温条件下(150℃、200℃)的层间剪切性能进行了研究.     

清水砼技术在民用建筑中的应用——浅谈建设项目如何应用新技术

本文通过介绍清水砼技术在民用建筑中的应用,对建设项目如何应用新技术进行探讨。     

在役生产装置安全评价存在的职业卫生问题

分析了在役生产装置安全评价存在的职业卫生问题,提出了如何做好重点生产装置职业病预防工作的建议。