结构稳定性

The effect of charging order of dioxolane comonomer in copolymerization with trioxane on microstructure of polyacetal was investigated by DSC, pyrolysis gas chromatography and polarized microscope.

用DSC、裂解气相色谱及偏光显微镜研究了聚合时的加料方式，对以二氧五环为共单体的共聚甲醛的结构的影响，并研究了它与热碱稳定性、缺口冲击强度等性能的关系。

The preparative technique of solid lubricant is cold-press sintering method.The micro-structure , friction surface, lubricant transfer film surface of base material was characterized by SEM; XRD was used to do phase analysis. The degrees of crystallinity of pure PTFE under the different conditions of water cooling, air cooling and furnace-varying cooling were made comparison by XRD. The thermal stability of pure PTFE and solid lubricant was analyzed by DSC-TG; The composition and valence state of elements in the surface of carbon fiber ,solid lubricant before and after friction test and lubricant transfer film were characterized by XPS; The frictional property of solid lubricant was tested by pin and disk test rig .

用SEM表征原料微观结构、摩擦表面及润滑转移膜表面形貌：用XRD进行原料物相分析，及比较水冷却、空气冷却、随炉冷却三种工艺条件下的纯聚四氟乙烯树脂的结晶度；用DSC-TG分析纯聚四氟乙烯树脂及固体润滑剂的热稳定性；用XPS表征碳纤维表面、固体润滑剂摩擦前后表面、润滑转移膜表面的元素组成、价态变化；用销盘式摩擦磨损试验机对固体润滑剂进行摩擦性能测试；采用专用的台架模拟试验机对固体润滑剂镶嵌轴承套与钢轴摩擦副间的摩擦磨损性能进行测定；用莱次偏光显微镜测试固体润滑剂的硬度；用材料试验机测试固体润滑剂的抗压强度等。

The physicochemical properties of cx - 2 correspond to cytodex - 3 mc produced by pharmacia , including of color , loss of drying , area , density , size , soakage , dilation , stability , size distribution , mechanical strength , surface structure , etc ., but its cost of manufacture is lower than cytodex - 3 s

通过优化工艺制备的cx - 2微载体，在色泽、干燥失重、比表面积、成球率、密度、直径、吸水量、溶胀度、粒度分布、表面结构、机械强度、稳定性等理化指标与pharmacia公司cytodex - 3微载体相当，但成本价格要低得多。

It's an effective measure of fast valving in improving the dynamic stabilities of power system and preventing the overspeed of steam turbines, but the fast valving technique available can satisfy the need of modern steam turbines no more. On the basis of the new type fluid logic valve, which combines the regulating systems and safety systems happily, the steam turbine EHC based on new principle is put forward, one of its outstanding characteritics is, the fast valving is operating in a closed control loop. For the implementation of control for steam generator regulation and safety systems with nonlinear mult-operating modes, a new methodology for designing a fuzzy logic controller is proposed, which is based on the combination of"error phase plane"and"variable universe of discourse". Application of a double-mode FLC with the new methodology is presented, the validity of the design methodolody is desmonstrated by test; A new methodolody is also presented to improve the design and tuning of a FLC using variable structure control theory.

本文还详细讨论了快关控制在提高电力系统暂态稳定性及超速保护中的应用，分析了现有的快关控制规律的局限性，研究出一种基于新型快关阀的汽轮机电液控制系统，其突出特点是使汽轮机闭环快关成为现实，指出这种基于新的组成原理与设计方法的汽轮机电液控制系统对不同工况下的适应能力；针对汽轮发电机组多工况、非线性的特点，提出一种把&误差相平面&方法与&可变论域&思想有机结合的双模FLC设计与调整的新方法，试验结果表明该系统具有良好的动、静态特性；为改善FLC控制规则的设计与调整，作者还介绍了一种把滑模变结构理论成功应用于模糊系统设计的新方法。

For the device of this structure significant decrease of the fluctuation in both the emission current and the PS diode conduction current and the spike noise are also obtained.

这种结构的PS二极管工作电流和发射电流的波动性被明显减弱，器件稳定性得到提高。

The geometry on this harness has been chosen in order to guarantee stability in flight, even without the use of cross bracing.

为了保障在飞行中的稳定性，甚至不需使用交叉拉线，运用几何结构设计就可达成此目的。

The utility model has the advantages of novel structure, fixing the load transducer on the glide cushion block of the hydraulic rope adjusting device of the wire rope of the elevator, directly reflecting the actual load of wire rope and ensuring the authenticity, reliability and stability of the signal of the transducer.

优点在于：结构新颖，将载荷传感器固定在提升机钢丝绳液压调绳装置的滑动垫块上，能直接反映钢丝绳的实际载荷，保证了传感器信号的真实性及其工作的稳定性和可靠性。

Mathematics analysis and simulation result both show that the solution mainly cut-down the requirement on the hardware and network environment, and also certainly improve the image quality. The robust of transfer network is been improved by the small-world-based unstructured P2P network.

数学建模与仿真两方面的结构都显示了解决方案有效的降低了实时视频编码过程中对提供及接受端背景工作环境的干扰，提高了实时视频的图像质量，并通过基于小世界理论的对等网构建算法实现了去中央化的传输网络，大幅提高了实时直播系统的稳定性及系统效率。

Microstructure observation, micro-hardness testing, scanning electron microscope observation, energy dispersive spectroscope and X-ray diffraction analysis were employed to investigate the structure and performance of the joints.After SSNCed for 5min by means of HESP, surface nanostructured layer about 70μm and 50μm thickness were obtained on the stainless steel and titanium alloy ends respectively.

文中对高能喷丸处理后的不锈钢和钛合金的纳米组织进行了表征；试验研究了不锈钢和钛合金表面层纳米组织的热稳定性；采用恒温恒压、脉冲加压对表面自纳米化0Cr18Ni9Ti不锈钢与TA17近α钛合金进行扩散连接；借助拉伸实验机、金相观察、显微硬度测试、扫描电镜观察、能谱分析、X-射线衍射等分析手段研究了表面自纳米化钛合金与不锈钢扩散连接接头的组织结构和性能。

Keywords polychlorinated diphenyl ether;density functional theory;position of Cl atom substitu-tion;structural parameter;thermodynamic property;relative stability

多氯联苯醚；密度泛函理论；氯原子取代位置；结构参数；热力学性质；相对稳定性

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。