锥度量空间中四个自映射的公共不动点定理

在完备的锥度量空间中讨论了4个自映射的公共不动点定理,其存在性和唯一性得到证明。所得主要结果将锥度量空间中的公共不动点定理进行了推广。     

试论水质分析中的质量控制

分析了本地区在水质分析过程中影响质量控制的因素,提出了符合本地区实验室的质量控制措施,并通过改善实验室仪器与环境控制、监督实验过程、合理处理检测与报出的数据、做好质量控制管理工作等多种方法,来达到实验室质量控制标准.希望为以后的水质分析质量控制工作提供参考.     

Hibernate应用中查询接口的设计

Hibernate核心API提供了HQL、QBC及本地SQL语句完成查询功能.通过实例给出了这几种接口的实现方法及查询语句的应用过程.为了提升查询性能,分析了Hibernate的缓存机制和检索策略,目的是要确定合理的查询方式,以便得到优化的SQL语句,从而减少访问数据库的频次及节省内存资源.     

一种短小芽孢杆菌分离鉴定及培养条件研究

为实施城市垃圾渗透液的生物无害化处理,分离、筛选、鉴定,获得特定菌株,并对其最适培养条件和最佳培养基组分进行优化。从城市垃圾填埋场垃圾渗透液中分离芽孢杆菌,通过设计特异性引物进行PCR反应鉴定目的菌株。此菌细胞呈现杆状,革兰氏阳性,经鉴定为短小芽孢杆菌。采用单因素实验和正交实验法对菌株生长适宜的培养基进行了优化。优化后的培养基主要成分为：玉米淀粉0.1%,酵母提取物1.0%,小牛浸膏0.3%,NaCl0.5%,MgSO4·7H2O 0.49%。在这种条件下,菌株培养10h,其OD320由1.44上升到6.93,为该菌株的深入研究和应用奠定了基础。     

Kaiser 效应点识别方法及储层地应力预测

在储层岩心Kaiser 实验中,声发射累积曲线通常出现多个突变点,导致常规Kaiser 效应点识别方法不精确,甚至存在无法读取Kaiser 点的问题。为此,提出将声发射能量图谱与声发射累积曲线结合的Kaiser 效应点优化识别方法,并用于某油田X区块储层地应力预测。岩心单轴加载实验结果表明：加载初期,岩心处于压缩阶段,声发射数量较多,声发射能量值波动范围较大;加载中期,岩心处于弹性形变阶段,声发射数量较少,声发射能量值较低,变化幅度均一;加载后期,应力达到储层岩心破裂压力,岩心发生破裂,声发射数量急剧增加,声发射能量值达到峰值。加载中期阶段,当轴向应力达到储层岩心承受的历史最大应力时,岩心突然释放大量能量,声发射数量和能量值均突增,随后迅速降低,该现象与Kaiser 现象相吻合,因此通过声发射能量图谱与声发射累积曲线结合的方法能够识别Kaiser 效应点。利用优化后的Kaiser 效应点识别方法,分析某油田X区块地应力分布,计算结果与现场测试结果吻合。     

生球干燥过程及其数学模型

本文探讨了生球干燥过程,发现干燥速度与时间的关系曲线呈“双峰”状和“过渡”状等现象,分析了这种现象的原因,在此基础上,综合考虑了生球干燥过程的物质平衡和能量平衡,建立了生球干燥的全过程模型,实验证明该模型能很好地描述生球干燥的全过程。     

Electrochemical and microstructural characterization of cyclic redox behaviour of SOFC anodes

The oxidation of Ni to NiO in solid oxide fuel cell (SOFC) anode will result in large bulk volume change, which may change the interfaces of the two phases in the anode cermet and thus may cause significant performance degradation. The reduction and oxidation (redox) of the Ni/YSZ cermet were studied at 800 ℃. Anodic polarization measurements were performed before and after redox cycles. The anode current density at an overpotential of 100 mV kept decreasing during the whole redox treatment. It decreased from 19.11 to 7.95 mA·cm-2 after two redox cycles. Anode supported unit cell was assembled for cell's discharge measurements. Cell performance declined after each redox cycle. The maximum power density decreased from 126.28 to 40.32 mW·cm-2 . The microstructural changes after redox cycling were recorded using scanning electron microscopy (SEM). The results reveal that after re-oxidation, the Ni gets coarse and has a higher porosity; the nickel network structure turns to be desultory.     

脉冲等离子体微弧氧化法制备TiO2薄膜及膜层的性能研究

采用硅酸盐溶液体系，利用正交分析法得到其组分的最佳配比，用直流脉冲微弧氧化法在TA2工业纯钛基体上生成多孔的钛氧化物陶瓷膜。用X射线衍射法检测了氧化陶瓷膜的晶体结构，主要由金红石晶型构成，考查了膜的抗热冲击性、在还原性酸中的耐腐蚀能力，用紫外-可见光-分光光度计进行了氧化膜层的光催化活性研究，验证了TiO2薄膜优良的光催化特性。     

Dissolution mechanism of solid nickel in liquid zinc saturated with Fe

The dissolution behavior of solid nickel in static liquid zinc saturated with Fe at 723 K was studied. The results show that when immersing solid Ni in liquid Zn saturated with Fe, the intermetallic compound layers consisted of γ and δ phases are formed on nickel substrate, which is the same as that in liquid pure zinc. However, some F2 particles are formed in the liquid near the solid/liquid interface. These Г2 particles can easily heterogeneously nucleate on （particles and grow fast. The dissolution process is governed by diffusion of nickel atom across a concentration boundary layer in liquid Zn saturated with Fe, and is different from a mixed control mechanism of nickel in liquid pure zinc. The participation of Г2 particles makes the dissolution of solid Ni in the liquid accelerated.     

蠕墨铸铁CA6110柴油机缸体的试验研究

在现有汽缸体高压造型生产线上进行大马力柴油机蠕墨铸铁缸体的试验,试验铁液化学成分w为3.6%~3.9%C;2.2%~2.4%Si;0.2%~0.5%Mn;P≤0.06%;S≤0.03%,采用自行研制的成分为8%~10%Mg,2%~3%RE的蠕化剂进行冲入法蠕化处理,同时加入0.8%~1.0%Cu和0.03%~0.05%Sn,成功的铸造出蠕墨铸铁CA6110柴油机缸体。对附铸试样和铸件本体进行了金相组织和力学性能检测,结果表明,试样的的蠕化率可达80%~85%,珠光体含量达80%~85%,力学性能σb>480 MPa,δ=1.0%~1.5%,180~200 HBS;缸体铸件本体的蠕化率同样为80%~85%,硬度可达197~214 HBS。试验结果表明:采用的铸造工艺方案是合理的,在铁液中加入的Cu和Sn可明显增加蠕墨铸铁的珠光体数量,提高抗拉强度和硬度,满足大马力柴油机对性能的要求。