氟碳树脂的加工成型工艺与一般工业应用

本文介绍了氟碳树脂一般性质，概述了依据不同氟碳树脂性质上的差异，选择合适的加工工艺，并且论述不同工艺成型的成品所适合的使用条件和使用范围。     

生产测井数据库研制

根据关系规范化的理论和生产测井资料的特点，采用实体－联系模拟方法，建立了８个满意第三范式的基本表。采用国际标准的数据结构查询语言并嵌入Ｃ语言，实现了生产测井数据库功能模块中的２２种功能，主要包括动态表，数据查询，批量数据处理等功能。     

Enhanced piezoelectric properties and electrocaloric effect in novel lead‐free (Bi0.5K0.5)TiO3‐La(Mg0.5Ti0.5)O3 ceramics

The crystal structure, electromechanical properties, and electrocaloric effect (ECE) in novel lead‐free (Bi_0.5K_0.5)TiO₃‐La(Mg_0.5Ti_0.5)O₃ ceramics were investigated. A morphotropic phase boundary (MPB) between the tetragonal and pseudocubic phase was found at x = 0.01‐0.02. In addition, the relaxor properties were enhanced with increasing the La(Mg_0.5Ti_0.5)O₃ content. In situ high‐temperature X‐ray diffraction patterns and Raman spectra were characterized to elucidate the phase transition behavior. The enhanced ECE (ΔT = 1.19 K) and piezoelectric coefficient (d₃₃ = 103 pC/N) were obtained for x = 0.01 at room temperature. Meanwhile, the temperature stability of the ECE was considered to be related to the high depolarization temperature and relaxor characteristics of the Bi_0.5K_0.5TiO₃‐based ceramics. The above results suggest that the piezoelectric and ECE properties can be simultaneously enhanced by establishing an MPB. These results also demonstrate the great potential of the studied systems for solid‐state cooling applications and piezoelectric‐based devices.     

磁航向测量系统误差修正方法研究

介绍了磁航向测量系统的设计．分析了影响磁航向精度的误差来源及目前磁航向误差补偿算法存在的问题。在此基础上提出一种基于椭圆最佳二乘拟合的新算法．对现有的磁航向误差补偿算法加以改进。试验结果表明，该补偿算法在不以增加硬件复杂度和软件计算量为代价的前提下，能够很好地修正软硬磁场引起的磁航向误差，提高了磁航向测量系统的完整性与实用性。     

Dispatching medical supplies in emergency events via uncertain programming

This paper employs uncertain programming to deal with a problem of dispatching medical supplies in emergency events. As we know, the highly unpredictable nature of emergencies and the severity of the accident may lead to uncertainty both in demands and running times. Under this condition, the demands and running times are supposed to be uncertain variables. Within the framework of uncertain programming, two mathematical models are constructed. In addition, some properties of the models are also discussed. Moreover, a hybrid intelligent algorithm for solving the proposed models in general cases is designed. Finally, some numerical examples are also presented to illustrate the optimization ideas and the effectiveness of the proposed algorithm.     

Uncertain programming model for uncertain minimum weight vertex covering problem

In this paper, the minimum weight vertex covering problem with uncertain vertex weights is investigated. By virtue of the uncertainty distribution operation of independent uncertain variables, the uncertainty distribution of the minimum weight of vertex cover is derived, and the concept of the \(\alpha \)-minimum cover among uncertain weight vertex covers is proposed within the framework of uncertain programming. Then an \(\alpha \)-minimum model for uncertain weight vertex covering problem is established and discussed. Taking advantage of some properties of uncertainty theory, the model can be transformed into the corresponding deterministic form. At last, a numerical example is presented to show the performance of the model.     

含纳米CdS玻璃的溶胶－凝胶制备和性质

采用溶胶－凝胶制备工艺，得到了尺寸为３～６ｎｍ的分散在二氧化硅凝胶玻璃中的硫化镉（ＣｄＳ）半导体微晶，观测了其吸收光谱和荧光光谱，以及三阶非线性光学极化率。结果表明：随着ＣｄＳ微晶尺寸的减小，复合材料的吸收边和荧光峰表现出明显的蓝移现象，最大移动约０．３ｅＶ。通过简并四波混频装置测量的复合材料的三阶非线性极化率为１０￣（－１１）ｅｓｕ，考虑ＣｄＳ浓度影响后为１０￣（－９）～１０￣（－８）ｅｓｕ。     

电弧光保护在中低压母线保护中的应用

110kV瑞金变采用了一种利用电弧光信号和主变二次侧电流作为判据的保护系统,动作快速可靠,简单实用,为中低压母线保护提供了一种可借鉴方案。     

菏泽水情分中心建设与应用

菏泽水情分中心是国家防汛抗旱指挥系统一期工程山东7处分中心之一,建设内容包括水文站雨量、水位、流量测验设备、报汛通信设备和中心计算机网络、通信设施及控制运行软件等.水情分中心的建设与应用,提高了报汛时效性和观测精密度,取得了良好的社会效益和经济效益,满足了防汛抗旱工作的要求.     

1,1,2,2-四对羟基苯基乙烷四缩水甘油醚环氧树脂的合成

将1,1,2,2-四对羟基苯基乙烷与环氧氯丙烷在醚化催化剂四乙基溴化铵和溶剂异丙醇存在下,先进行醚化反应,然后加入适量的NaOH进行环氧化脱氯反应,再经水洗、分离、精制,得到1,1,2,2-四对羟基苯基乙烷四缩水甘油醚环氧树脂(PGEE)。研究了原料配比、反应时间和温度对PGEE环氧值和可水解氯含量的影响。实验结果表明,当环氧氯丙烷与1,1,2,2-四对羟基苯基乙烷摩尔比为21、1,1,2,2-四对羟基苯基乙烷与NaOH摩尔比为1∶4.0、醚化温度85℃、醚化时间4h、环氧化温度70℃、环氧化时间2.5h时,所得PGEE环氧值为0.51m ol,可水解氯质量分数为1.92×10-4,收率为57.5%。经傅里叶变换红外光谱和核磁共振表征,初步确认合成的产品为PGEE。