219 research outputs found

    Flame Retardant Modification of Epoxy Using Phosphorus-containing POSS-based Polymers

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    环氧树脂因其具有良好的粘结性、化学稳定性、低收缩、优异的机械性能、易加工成型和成本低廉等优点,而广泛应用于粘结剂、涂料及电子封装等领域,但是由于环氧树脂存在内应力大、质脆,耐热性及阻燃性能不足而使得其应用受到限制。传统含卤素尤其是含溴阻燃剂虽被证明有很好的阻燃效果并得到广泛应用,但研究发现其在燃烧时会生成有毒物质,使得含卤阻燃剂的使用受到限制。建立新型无卤、无毒的环氧阻燃体系已成为科研工作者关注的研究热点之一。 本文以DOPO(9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物)为磷源合成了两种可聚合的含磷单体,分别通过可逆加成断裂链转移(RAFT)聚合和自由基聚合制备出具有反应性的含磷硅...Epoxy are widely applied in the fields such as the adhesives, coatings and electronic packaging for its properities of great adhesion, chemical stability, low shrinkage, excellent mechanical properties, easy molding processability and low-cost. Whereas, for the existence of internal stress, the defect of brittleness and the insufficient heat resistance and flame retardance, the application of epox...学位:理学硕士院系专业:材料学院_高分子化学与物理学号:2072012115004

    Design and Implementation of Fujian Medical Insurance System

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    福建省医疗保险管理信息系统自1997年开始试点建设,至今全省九个地级市和省直部门均已建立了各自的医保信息系统,与定点医院、定点零售药店、银行等相关机构实现了联网、实时结算,为全方位实行职工基本医疗保险、保障医保基金的安全、高质量管理基金的收缴和支出做出显著的贡献。但由于全省医保信息系统未实现联网,各区市医保系统均处于各自独立的运行状态,参保人员到异地看病就医时,须先垫付医疗费后再回原医保中心进行报销结算,既给参保人员带来不便,也增加了医保业务经办机构的工作量。在此背景下,省医保中心提出,在充分利用现有的信息网络资源的基础上,实行全省医保信息系统联网。 目前,全省各地医疗保险实施现状各不相同,...Fujian’s health insurance management system began implementation in 1997. At present, nine prefecture-level cities and departments under the administration of the provincial party committee have established health insurance systems, each system having its own hospitals, pharmacies, and banks. Unfortunately, due to disparate levels of economic development and implementation, the prefecture-level ci...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X200623000

    Creating Systems for the Public Computer Room in the University

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    公共计算机机房作为高校必备的教学设施,利用率高,面向对象多,使用环境也非常复杂,对机房系统的要求不仅是能用,而且要好用、通用、耐用。系统安装前,需选择合适的操作系统,了解各类软件需求,确定系统保护方式;系统安装过程中,需合理规划分区,升级系统补丁,安装、设置软件,在重要时刻备份系统;系统优化阶段,需对系统进行优化设置,查杀病毒,整合网络资源;最后安排人员试用系统,修改完善并复制到其它计算机。一个稳定、高效的系统不仅可以减轻高校公共计算机机房管理人员的工作量,也可以使任课教师和广大学生获得良好的系统使用体验,增加学生学习的兴趣,提高学习效率。Public computer rooms as the necessary teaching facilities are highly used and object-oriented;most of their environments are also very complex.The computer systems need to be usable,flexible and convenient.Before the software installation,you should choose some suitable operating systems and understand all the software requirements;During system installation,it should be rationally planning division and upgrade system patches and backup system in the right time;In the system optimization phase,you need to set the system optimization and killing virus;The last step,you must arrange specialized persons to go to trail the system,improve it and at last copy them to other computers.A stable and efficient system can not only reduce the management personnel’s workload of public computer room,and can make the teachers and students get good experience,increase students' interest in study and improve the learning efficiency

    Effect and mechanism of three kinds of drinking water on blood pressure of hypertensive mice

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    目的探究3种饮用水对高血压小鼠血压的影响及可能机制。方法测定3种饮用水的水质情况:溶解性总固体(TDS) 、耗氧量(OC); 、pH、氧化还原电位(ORP) 、电导率(EC); 、溶解氢、钙和镁;采用N'-硝基-L-精氨酸甲酯盐酸盐(L-NAME)连续灌胃法(30天)建立ICR小鼠高血压模型。然后将小鼠随机分为4组:正常; 对照组、模型对照组、模型自来水组和模型过滤水组,每个月检测小鼠血压,3个月后测定小鼠血清一氧化氮(NO) 、一氧化氮合酶(NOS); 、总超氧化物歧化酶(T-SOD) 、丙二醛(MDA) 、谷胱甘肽过氧化物酶(GSH-Px) 、内皮素(ET) 、血管紧张素(Ang); 、醛固酮(ALD) 、儿茶酚胺(CA) 、白细胞介素-6(IL-6); 、超敏反应蛋白(hs-CRP)及环磷酸鸟苷(c-GMP)含量;取小鼠心脏、肾脏和胸主动脉组织制作石蜡切片观察其形态。结果过滤水pH、TDS、OC; 、EC、钙和镁均高于纯水和自来水,ORP呈负值,且溶解氢含量高;模型过滤水组小鼠收缩压与平均血压[(106. 24 5. 31 )和(90.; 73 4. 99 ) mmHg]低于模型对照组[(119. 58 6. 08)和(96. 44 6. 48); mmHg],差异有统计学意义(P < 0. 05);模型过滤水组NO含量[(87. 05 39. 82) mumol; /L]明显高于模型对照组[(45. 01 9. 62) mumol /L]和模型自来水组[(46. 56 30. 54) mumol; /L],差异有统计学意义(P < 0. 05);模型自来水组和模型过滤水组IL-6[(201. 42 36. 41)和(173. 99 ; 114. 96) pg /mL]和Ang含量[(1319. 20 111. 90)和(1349. 38 180. 15) ng; /L]显著低于模型对照组[(363. 14 149. 00) pg /mL和(1736. 17 242. 86) ng; /L],差异有统计学意义(P < 0. 05);模型过滤水组T-SOD和GSH-Px活性[(268. 37 12. 25)和(712. 45 ; 30. 59 ) U/mL]显著高于模型对照组[(250. 46 15. 60 )和(678. 36 35. 80); U/mL],差异均有统计学意义(P < 0. 05) 。结论与纯水、自来水相比,过滤水可通过抗氧化、抗炎作用降低高血压小鼠血压。Objective To explore the effect of three kinds of drinking water and its; possible mechanism on blood pressure of hypertensive mice. Methods The; water quality parameters were measured for three kinds of drinking; water,and the parameters included total dissolved solids(TDS) ,oxygen; consumed(OC) ,pH,oxidation reduction potential(ORP ) ,electric; conductivity(EC ) ,dissolved hydrogen,calcium and magnesium.; Establishment of mouse model of high blood pressure by using; N'-nitro-L-arginine methyl ester hydrochloride(L-NAME) for 30 days. Then; the mice were randomly divided into 4 groups: normal control group,model; control group,group of tap water and group of filtered water. Blood; pressure in mice was detected every month. After 3 months,nitric; oxide(NO ) ,nitric oxide synthase(NOS ) ,total superoxide; dismutase(T-SOD ) ,malondialdehyde(MDA ) ,glutathione peroxidase(GSH-Px; ) ,endothelin(ET ) ,angiotensin(Ang) ,aldosterone(ALD); ,catecholamine(CA) ,high-sensitivity C-reactive protein(hs-CRP) ,; interleukin 6(IL-6) and cyclic guanosine monophosphate(c-GMP) in serum; of the mice were determined. Simultaneously morphological changes of; heart,kidney and thoracic aorta paraffin section were observed. Results; The pH,TDS,OC,EC,calcium and magnesium in filtered water were higher; than that of pure and tap water. The negative ORP and great quantities; of dissolved hydrogen were found in filtered water; The systolic blood; pressure and mean blood pressure((106. 24 5. 31) and(90. 73 4. 99); mmHg) of filtered water were lower than those of the pure water(119. 58 ; 6. 08 and 96. 44 6. 48 mmHg)(P < 0. 05) . The NO((87. 05 39. 82) mumol; /L) in the mice with filtered water were higher than those of with pure; and tap water((45. 01 9. 62) and(46. 56 30. 54) mumol /L)(P < 0. 05) .; Compared with those of the mice with pure water, significant decrease in; IL-6((201. 42 36. 41) and(173. 99 114. 96) vs.(363. 14 149. 00) pg; /mL) and Ang((1319. 20 111. 90 ) and(1349. 38 180. 15 ) vs.(1736. 17 ; 242. 86) ng /L) were observed in mice treated with tap and filtered; water(P < 0. 05) . The T-SOD and GSH-Px((268. 37 12. 25) and(712. 45 ; 30. 59) U/mL) in the mice with filtered water were significant higher; than those of pure water((250. 46 15. 60) and(678. 36 35. 80 ) U/mL)(P; < 0. 05 ) . Conclusion Compared with pure and tap water,filtered water; can reduce the blood pressure of the hypertensive mice by antioxidation; and anti-inflammatory.福建省高校产学合作项

    FTIR and XPS Analysis of Directly Bonded Si/Si Interface

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    【中文文摘】通过新颖的键合方法实现了Si/Si直接键合。采用傅里叶红外透射谱(FTIR)对Si/Si键合界面进行了研究,结果表明,高温退火样品的界面组分为Si和O,无OH和H网络存在。X射线光电子谱(XPS)测试结果进一步表明,界面主要为单质Si和SiOx混合网络,且随着退火温度的升高,界面层Si-Si直接成键的密度也越高。 【英文文摘】The Si/Si direct bonding has been achieved by a new bonding technology. Fourier transform infrared spectrum(FTIR) and X-ray photoelectron spectroscopy(XPS) are used to analyze the interface of Si/Si bonding. The results show that there are notinfrared absorbtion peak related to the Si-H bonding and Si-OH bonding in the interface at high temperature, and the interface is consisted of Si and SiO_x. In addition, the research indicates also that the Si/Si bonding density is increased with the increase of bonding temperature

    Interface of Si/Si Directly Wafer Bonding

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    【中文文摘】通过三步直接键合方法实现了 Si/ Si键合。采用 XPS、FTIR、I-V、拉伸强度等手段对 Si/ Si键合结构的界面特性作了深入广泛的研究。研究结果表明 ,高温退火后 ,在键合界面没有 Si-H和 Si-OH网络存在 ,键合界面主要由单质 Si和不定形氧化硅 Si Ox 组成。同时 ,研究还表明 ,I-V特性和键合强度强烈地依赖于退火温度。 【英文文摘】The Si/Si bonding has been achieved by three-step direct wafer bonding technology. Interfacial characteristic has been widely investigated by the X-ray photoelectron spectronscopy (XPS), Fourier transform infrared spectrum (FTIR),I-V and tensile strength. The results show that there are no infrared absorbtion peak related to the Si-H bonding and Si-OH bonding in the interface at high temperature, and the interface is made up of Si and SiO_x. In addition, the researches indicate that both I-V characteristic and bonding energy strongly depend on annealing temperatu re.国家基金 (项目编号 :6 0 0 0 6 0 0 4);; 国家重点基金 (项目编号 :6 0 336 0 1 0 )项目支

    Development of Compound Semic onductor Wafer and Device Bonding

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    【中文文摘】半导体晶片直接键合技术已成为半导体工艺的一门重要技术 ,它对实现不同材料器件的准单片集成、光电子器件的性能改善和新型半导体器件的发展起了极大的推动作用。文中详细叙述了近十年来 - 族化合物半导体键合技术的主要实验方法 ,并对各种键合方法的优缺点进行了比较 ,结合自己的工作对化合物半导体的键合机理和界面特性做了总结 ,针对目前的研究工作和应用做了展望 【英文文摘】Semiconductor wa f er direct bonding is a important techniq ue for integrating devices, improving th e performance of optoelectronic devices and making new devices. This paper prese nts the innovative wafer bonding methods of compound semiconductors, analyses th e advantages and disadvantages of variou s mehtods, then discusses the bonding me chanics and the generic nature of the in terfaces. Finally, examples of bonded de vices are presented.国家自然科学基金资助 (项目编号 :60 0 0 60 0 4

    超声引导间质性激光动力学疗法治疗肝癌新方法

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    超声引导间质性激光动力学疗法治疗肝癌新方法福建医学院附属二院邮政编码362000吕国荣,陈骥厦门大学抗癌研究中心曾超英,杨栋,黄萍有关超声引导间质性激光动力学疗法治疗肝癌国内外尚未见报道。本文报道11例采用该技术临床应用的经验并探讨其临床应用价值。原...福建省85攻关项

    低聚倍半硅氧烷基铁络合物阻燃剂的合成及改性环氧树脂

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    采用Kabachnik-Fields反应合成出含有邻苯二酚功能团、磷杂菲基团和笼型倍半硅氧烷结构基元的新型配体POSS-DOPO-Catechol(PDC),再与Fe3+配位络合形成低聚倍半硅氧烷基铁络合物Fe(PDC)3,进一步加入双酚A型环氧树脂(EP)进行固化制备出EP/Fe(PDC)3复合材料。利用红外、质谱和核磁共振表征配体及络合物的化学结构;通过差示扫描量热分析、热重分析、氧指数测定、微形量热、动态力学实验等方法研究铁络合物Fe(PDC)3的引入对环氧树脂固化温度、热性能、阻燃性能、力学性能及介电性能的影响。结果表明,添加Fe(PDC)3可以降低环氧树脂的固化温度、热释放速率及总热释放量,提高残炭量、氧指数,这是由于铁络合物可以有效促进材料在高温下形成稳定性良好的致密炭层,起到隔氧隔热作用,从而在燃烧过程中阻止材料进一步燃烧。国家自然科学基金资助项目(51573150);;\n福建省自然科学基金计划资助项目(2018J01079);;\n福建省技术重大研发平台项目(2014H2006);;\n福建省科技重大项目(2013HZ0005-1
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