利用Applet制作电子相册

本文通过介绍Applet的体系结构和其生命周期以及如何创建和执行Applet程序,介绍了电子相册的制作过程。     

电机智能制造发展现状及推进策略

随着电机制造要求逐步提高、自动化逐渐普及,智能制造将成为未来主流的生产制造模式。基于对传统电机制造现状和发展趋势的分析,厘清智能制造优势及智能制造推进误区,概括智能制造推进内容及策略。以江苏大中电机股份有限公司相关项目为例,介绍智能制造的侧重内容、实施步骤、原则及实施成果。结果表明：总体生产效率提高了35.75%,生产运营成本降低了26.21%,产品不良率降低了75.84%。在此基础上概括电机行业智能制造推进参考战略,为中小型电机行业发展提供支持。     

Thermal cross-linking and anti-meltdrop properties of copolyester containing phosphorus/magnesium salt composites by in situ polymerization

Polyester is widely used in household products because of its good mechanical properties and wears resistance, but polyester is easy to ignite and inclined to produce droplet, so its application range is limited. The cross-linkable magnesium hydroxide nanoparticles were incorporated into flame-retardant polyester, which enables the phosphorus-containing copolyester with thermal cross-linking and anti-meltdrop properties. The nanoparticles were achieved by in situ polymerization and acted as a nucleating agent for improving the crystalline properties of the copolyester. Furthermore, the nanoparticles also enhanced anti-meltdrop properties and reduced the heat and gas release during the combustion process of the copolyester. The maximum heat release rate and total smoke release reduced by 39.8% and 74.4% compared with pure polyester. Specifically, the combustion products of the nanoparticles and phosphorus flame retardant could act a barrier role by covering the carbon layer to isolate air and heat, thereby resulting in excellent anti-meltdrop properties. The simple modification method reported here realizes the collaborative modification of flame retardant and anti-meltdrop properties of phosphorous flame-retardant copolyesters by thermal cross-linking.     

Improving antibacterial,biocompatible, and reusable properties of polyvinyl chloride via the addition of aluminum alkoxides

Global bacterial infections associated with conventional polyvinyl chloride (PVC) medical devices place a heavy burden on healthcare systems and thus it will be desirable if medical devices are made from antimicrobial PVC. There are numerous studies focusing on polymer surface modifications to either leach antimicrobial agents or kill pathogenic microbes upon direct contact. In this work, mannitol fumarate ester-based aluminum metal alkoxide (MFE-Al) additive was developed to confer simultaneously improved antibacterial property and enhanced high temperature sterilization resistance of the resultant PVC. Data obtained confirm that the MFE-Al stabilized PVC sheets significantly inhibit 98% bacterial growth. They also show biocompatibility with cultured H9C2 cardiomyocytes and hemocompatibility in vitro. Dry heat sterilization is generally not suitable for PVC medical wares due to their poor thermal compatibility. Surprisingly, our antimicrobial-biocompatible PVC can maintain stability at 180°C for 90 min. Such a high thermal stability indicates the MFE-Al stabilized PVC can endure 90 cycles of dry-heat sterilization without significant damage. This study may provide a solution to reduce PVC medical waste for a maximum benefit without compromising human health or the environment.     

大学英语四级考试对职业院校学生英语学习反拨效应研究

本文以成都一所职业学院参加大学英语四级考试(CET-4)的学生为研究对象,采用问卷调查和访谈的形式探讨CET-4对职业院校学生英语学习造成的反拨效应.研究表明,学生普遍认同CET-4的相关测试性质,CET-4对学生产生的正面反拨效应远远超过负面反拨效应.同时研究表明,学生在备考过程中存在着一定的问题,例如对测试评分标准认识不足、缺乏良好的学习习惯等.     

BPDA/ODA体系微支化交联聚酰亚胺薄膜制备与性能研究

以三官能度的1,3,5-三(4-氨基苯氧基)苯(TAPOB)为交联剂,在3,3′,4,4′-联苯四甲酸二酐(BPDA)和4,4′-二氨基二苯醚(ODA)体系聚酰亚胺(PI)薄膜中构建微支化交联结构,制备出一系列具有不同TAPOB含量的PI薄膜,研究了TAPOB含量对薄膜力学性能、热力学性能、介电性能和吸水率的影响.结果表明:TA-POB的引入可明显提高BPDA/ODA体系PI薄膜的综合性能,交联结构的存在有利于提高薄膜的力学性能、降低热膨胀系数(CTE)和吸水率,微支化结构则对降低介电常数有一定的作用.     

ADSORPTION OF GALLIUM WITH N_503LEVEXTREL RESIN

ＡＤＳＯＲＰＴＩＯＮＯＦＧＡＬＬＩＵＭＷＩＴＨＮ＿５０３ＬＥＶＥＸＴＲＥＬＲＥＳＩＮＣｈｅｎ，Ｊｉａｎｒｏｎｇ；Ｈｕ，Ｊｉａｎｈｕａ；Ｐｅｎｇ，Ｃｈａｏｑｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＺｈｅｊｉａｎｇＮｏｒｍａｌＵｎｉｖｅｒｓｉｔ...     

近终型金属铸造模具制造工艺设计分析与应用

近终型制模技术，可以缩短制模周期、降低生产成本。本文介绍近终型技术在制模工艺实际中的应用概况。并举出实例，指出近终型制模技术可以提高生产效率，快捷地制造出各种复杂的零件/金属模具，该技术有着广阔的应用前景。     

220 kV升压站母线PT二次回路接地故障分析及处理措施

针对某新投运的220 kV升压站内一起母线PT二次回路接地故障事件进行了分析,发现故障原因为开关内部配线工艺不符合规范要求,在GIS开关多次合闸振动作用力下导致母线PT二次电缆绝缘损坏,造成互感器B相二次电缆发生金属接地故障,并提出了针对性处理措施,为避免同类问题发生提供了借鉴.     

基于区块链的分布式光伏就地消纳交易模式研究

目前配电网中分布式光伏发电渗透率越来越高,利用区块链技术的去中心化、难篡改等特点,有助于分布式发电就地或就近消纳,提高配电网运行的经济性。提出了一种基于区块链的光伏就地消纳交易模式,建立了光伏发电用户和分布式光伏聚合商的效益函数,运用Stackelberg博弈模型确定内部电价,通过边缘计算制定最优用电计划,设计了基于信誉值的就地消纳交易机制,对就地消纳程度低的用户进行惩罚,鼓励用户通过可时移负荷消纳光伏出力。配电网仿真结果表明,在采用区块链的交易模式下,配电网的就地消纳情况得到改善,用户的综合效益得到提升。