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Laser-Induced Incandescence (LII) is investigated in laminar premixed flat ethylene/air flames at pressures up to 5 bar in a recently constructed high-pressure burner. Time-resolved LII signals were compared with a numerical model considering the influence of pressure on the LII signal decay. Peak particle temperatures after laser heatup were measured by the detection of the LII signal at two wavelenghts. Laser-induced emission spectra enabled to check for interfering signals. Gas-phase temperatures were requiered to compare the LII signal decay with the model and were measured using multi-line NO-LIF thermometry.

Biotage是最早开发出商品化的快速制备色谱仪的公司。市场占有率最高。 Biotage最新推出智能化的快速制备色谱, 具有优秀的分离效果，最高的纯度和收率。

Stability of the Si-H bonds on the hydrogen-terminated Si(111) surface has been investigated by sum frequency generation (SFG) spectroscopy in air at room temperature. The SFG observation showed that the Si(111) surface is terminated by a monolayer of monohydride (Si-H) after etching in a concertrated ammonium fluoride (NH4F) solution. The number of Si-H bonds decreased with laser irradiation time and the abstraction rate of hydrogen atoms on Si increased with the increase of input energy of "visible" light. The Si-H bond under irradiation at 1064nm light was more stable than that at 532nm light with a given intensity. A small amount of water in air severely lowered the stability of Si-H bond because of a photoelectrochemical recation under laser irradiation.

The efficiency and mechanisms of cooling a constant heat flux surface by impinging synthetic jets were investigated experimentally and compared to cooling with continuous jets. Effects of jet formation frequency and Reynolds number at different nozzle-to-surface distances (H/d) were investigated. High formation frequency (f = 1200 Hz) synthetic jets were found to remove heat better than low frequency (f = 420 Hz) jets for small H/d, while low frequency jets are more effective at larger H/d. Moreover, synthetic jets are about three times more effective in cooling than continuous jets at the same Reynolds number. Using PIV, it was shown that the higher formation frequency jets are associated with breakdown and merging of vortices before they impinge on the surface. For the lower frequency jets, the wavelength between coherent structures is larger such that vortex rings impinge on the surface separately. KEYWORDS:

给出了蝙蝠飞行的实验测量结果。包括直线和回转飞行时的运动特性高帧频记录，以及蝙蝠飞行方向后部尾流漩涡的测量。

采用化学成分分析、金相检验和断口分析等方法，对304L钢D210塔筒体泄漏原因进行了分析。结果表明：D210塔筒体泄漏原因是由于氯离子的存在而产生应力腐蚀开裂所致。由于敏感材料、应力腐蚀环境及应力三个条件共同存在，在一定温度下使其产生应力腐蚀裂纹，裂纹起始于筒体外壁角焊缝处，而后向内壁扩展，最终穿透筒壁，致使该塔筒体在角焊缝处产生破裂泄漏。

Vortex generator jets (VGJs) have been found to be an effective method of active separation control on the suction side of a low pressure turbine (LPT) blade at low Reynolds numbers. The flow mechanisms responsible for this control were studied and documented in order to provide a basis for future improvements in LPT design. Data were collected using a stereo PIV system that enabled all three components of velocity to be measured.

报道了高帧频PIV系统(HS-SPIV)应用于管道中三维流场和流动结构的分析研究。系统高采样速率使得可以依据泰勒假设重构三维流场。

本文研究了在稳定剂存在的条件下，在钢铁表面制备了Cu-Sn-P多元合金化学镀层，讨论了镀液成分和沉积条件等对镀层性质的影响．采用了硬脂酸、月桂酸和苯并三氮唑对Cu-Sn-P镀层表面进行再处理，从而形成致密保护膜，得到Cu-Sn-P／stearic acid(1auric acid，BTA)镀层，并研究了其性能． 只做学术交流，不做其他任何商业用途，版权归原作者所有！

赛默飞世尔科技实验室自动化部门，位于加拿大多伦多，拥有30余年实验室自动化机械臂研发与系统整合的经验。强大的软件开 发与项目管理团队，为药物筛选、合成生物学、二代测序等不同领域用户提供不同规模的实验室自动化解决方案，帮助客户实现 更高的通量、无人值守操作、样本操作的一致性、灵活的流程控制，以及实验过程的审计追踪。灵活升级的定制化实验室自动化 整合方案，轻松实现实验室的高通量、标准化运行和智能化管理。

In this paper we study the formation of NO in laminar, nitrogen diluted methane diffusion flames that are seeded with ammonia in the fuel stream. We have performed numerical simulations with detailed chemistry as well as laser-induced fluorescence imaging measurements for a range of ammonia injection rates. For comparison with the experimental data, synthetic LIF images are calculated based on the numerical data accounting for temperature and fluorescence quenching effects. We demonstrate good agreement between measurements and computations. The LIF corrections inferred from the simulation are then used to calculate absolute NO mole fractions from the measured signal.

EBSD 技术可以通过研究晶粒取向关系、晶界类型、再结晶晶粒、微织构等，反应材料在凝固、形变、相变、失效破坏等过程中晶粒是如何形核长大及晶粒间的取向转换等，可以作为技术人员提高材料性能的理论依据，目前 EBSD 技术广应用于金属、陶瓷、地质矿物等领域。

摘要：EVA胶膜是一种以EVA为基材经过挤压成型工艺形成的热固性膜状热熔胶，与硅晶片、玻璃、背板粘接制成太阳能电池板。其透光率和剥离强度对太阳能电池的寿命起着至关重要的作用。本文从试验的角度，论述了EVA胶膜透光率和剥离强度的测试方法，以期为相关企事业单位和科研院校提供一定的科研帮助。 关键词：EVA胶膜，透光率、剥离强度、XLW（PC）智能电子拉力试验机 作者：济南兰光机电技术有限公司

In the 1980s, there was great enthusiasm about molecular assemblies based on Langmuir–Blodgett (LB) films. Visions were proposed for the next millennium such as “Molecular electronics in which organic molecules perform an active function in the processing of information and in transmission and storage” (1–3). These proposals raised many expectations. Being now at the beginning of a new millennium, this review will aim to critically assess the accomplishments and perspectives.

摘要：论述了氯离子化气相色谱仪的原理、构造以及与该仪器应j{{密切相关的多种影响囡素．同时还舟绍了谊投 嚣的广泛应用以丑在分析测试中的一些技巧，尤其是在气体工业和半导体制造工业所用化学品的分析 关键词：氦离子化；气相色谱；痕量分析

磁力搅拌器是在现有同类产品的基础上经研制改进而成，设计新颖合理，是各大专院校，科研单位，工厂等凡需搅拌的各种液体作化学反应试验的必不可缺的搅拌设备。反应釜搅拌器一个好的选型方法最好具备两个条件，一是选择结果合理，一是选择方法简便

本理论解释了动态和静态接触角的概念及其区别，并通过不同的测量方法：光学和力学接触角检测来分析评价两种接触角测量方法。

The orientation, structure, and energetics of the vapor/acetone-water interface are studied with sum frequency generation vibrational spectroscopy (SFG-VS). We used the polarization null angle (PNA) method in SFGVS to accurately determine the interfacial acetone molecule orientation, and we found that the acetone molecule has its CdO group pointing into bulk phase, one CH3 group pointing up from the bulk, and the other CH3 group pointing into the bulk phase. This well-ordered interface layer induces an antiparallel structure in the second layer through dimer formation from either dipolar or hydrogen bond interactions. With a double-layer adsorption model (DAM) and Langmuir isotherm, the adsorption free energies for the first and second layer are determined as ¢G°ads,1 ) - 1.9 ( 0.2 kcal /mol and ¢G°ads,2 ) - 0.9 ( 0.2 kcal /mol, respectively. Since ¢G°ads,1 is much larger than the thermal energy kT ) 0.59 kcal /mol, and ¢G°ads,2 is close to kT, the second layer has to be less ordered. Without either strong dipolar or hydrogen bonding interactions between the second and the third layer, the third layer should be randomly thermalized as in the bulk liquid. Therefore, the thickness of the interface is not more than two layers thick. These results are consistent with previous MD simulations for the vapor/pure acetone interface, and undoubtedly provide direct microscopic structural evidences and new insight for the understanding of liquid and liquid mixture interfaces. The experimental techniques and quantitative analysis methodology used for detailed measurement of the liquid mixture interfaces in this report can also be applied to liquid interfaces, as well as other molecular interfaces in general.

Nitric oxide laser-induced-fluorescence (NO-LIF) 2-D imaging measurements using a new multi-spectral detection strategy are reported for high-pressure flames (1–60 bar). This work builds on previous research that identified interference LIF from O2 and CO2 in high-pressure flames and optimized the choice of excitation strategies as a function of application conditions. In this study, design rules are presented to optimize the LIF detection wavelengths for quantitative 2-D NO-LIF measurements over a wide range of pressures (1–60 bar) and temperatures. Simultaneous detection of LIF in multiple wavelength regions enables correction of the NO signal for interference from O2 and CO2 and allows simultaneous imaging of all three species. New experiments of wavelength-resolved 1-D LIF in slightly lean (/ = 0.9) and slightly rich (/ = 1.1) methane/air flames are used to evaluate the design rules and estimate the NO detection limits for a wide range of flame conditions. The quantitative 2-D measurements of NO in the burnt gas are compared with model calculations (using GRI-Mech 3.0) versus pressure for slightly lean and slightly rich flames. The discussions and demonstrations reported in this study provide a practical guideline for application of instantaneous 1-D or 2-D NO-LIF imaging strategies in high-pressure combustion systems.

Particle sizing and velocity measurements are undertaken in an atomizing water mist jet impinging onto a heated copper plate. This study forms part of an investigation into the heat transfer and flow field obtained from the mist jet. The droplet sizes obtained are compared to manufacturer’s data. This analysis is performed for the near field and mid field. Ultimately, the effects of particle sizes and velocities will aid the understanding of the heat transfer mechanisms involved.

磁力搅拌器适用于粘稠度不是很大的液体或固液混合物，可以单独搅拌或边加热边搅拌。它利用放入液体中的磁性搅拌子在旋转磁场中的连续圆周运动达到搅拌液体的目的。

本文给出了用时间分辨立体PIV(TRSPIV)实验解决实验室尺度内混合器中的瞬态流场结构问题。研究了漩涡结构的时间演化规律。

Eight samples from the Nuclear Division of a company were analyzed. These samples have complex matrices such as salt, concentratedacid, etc. and required high dilution factors when flame AAS is used. This application note will demonstrate the feasibility and simplicity of the ICP technique for this type of analysis.

This article treats of the flow motion over the so-called vortex ripples which are generated by water oscillations above a sand bed. We focus mainly our experimental works on the morphology and the dynamics of transient flow patterns above real vortex ripples. With the help of flow visualizations and Particle Image Velocimetry measurements with a high-speed video CCD camera, we test numerical simulations, which predict the existence of a secondary vortex with a streamlines representation. However, our experimental findings show only one vortical structure and validate the observations of Bagnold in 1946 (using real ripples but with no visualization and measurement) and Sand Andersen & al. in 2004 (using model ripples) with respect to the existence of a transient jet.

采用氧化铝模版由交流电沉积法制备纯银纳米线，然后采用氧化还原法，在纳米线表面包裹金壳层，得到具有壳核结构的银金复合纳米线！ 只做学术交流，不做其他任何商业用途，版权归原作者所有！

文章作者建立了一套完整的生物气溶胶研究平台,从生物气溶胶的发生到特性研究,再到生物气溶胶的体内注入研究,数据详尽,内容翔实,研究领域处于世界前沿. 文中具体介绍了气溶胶发生器,气溶胶粒径测定仪,生物撞击采样器等仪器的使用方法,数据分析等

微泡，按照国际标准化组织ISO的定义，指液体中直径小于100um的气泡，其中直径小于1um的称为超微气泡又称为纳米气泡.微泡具有多种优异性能，如比表面积大，界面δ电位高，产生自由基,强化传质效率等，因此在医学，浮选，污水处理等多个领域得到广泛应用。微泡含氧量高，深入毛细孔，可活化细胞，促进血液循环，美白洁肤，利用微泡技术美容是目前十分流行的美容趋势。本文选择了一款具有能喷洒微泡的花洒，测试了花洒产生的微泡的粒径分布及不同水温和花洒档位下微泡的数量。

显微共焦拉曼光谱仪优异的空间分辨率不仅可用于聚合物的单点检测，还可用于平面及纵向的成像扫描，获得空间分布及纵向各层分布及厚度。此外，还可远程在线监控聚合物的反应过程，对其进行实时测定。

利用化学偶联法将末端修饰氨基的寡聚核苷酸固定在表面修饰有羧基化碳纳米管(CNTs-COOH)的金电极表面,制备新型核酸探针, 可以特异性结合目标单链寡聚核苷酸. 以阿霉素作为嵌合指示剂, 利用示差脉冲法测定杂交的结果. 经过实验条件的优化, 测定DNA 浓度在1.0×10－6～1.0×10－9 mol/L 呈良好的线性关系. 检测限为: 2.54×10－10mol/L. 碳纳米管特有的纳米结构对检测结果的放大作用, 提高了该传感器的检测限和灵敏度

对于小比表面积样品，如电池材料、有机材料、生物材料、金属粉体、磨料等空隙度微小的材料，由于吸附量微小，静态法测试的结果较含有风热助脱装置和检测器恒温装置的高精度动态法仪器误差大。对静态法为什么在小比表面样品测试方面精度难以保证，原因如下：