特性表面

In this paper,the drag-reducing surfactant solution flows in a fully developed turbulent channel flow have been analyzed experimentally using Phase Doppler Anemometry and thermocouples in order to study the temperature fluctuations and heat transfer characteristics on the drag-reducing and heat transfer reduction phenomena of the surfactant solution flows.

该文针对在水中添加阳离子表面活性剂产生的减阻作用同时降低传热性能的现象，应用相位多普勒激光测量系统和热电偶温度测量系统对二维流道内表面活性剂减阻流体热边界层内的湍流温度脉动以及传热特性进行了实验研究。

Ceramic bearings can produce oxidation-ho, silicon carbide, silicon nitride and so on, diameter from 3mm-50mm, precision Machinable P0, P6, P5 level; its performance characteristics are: high temperature, oil-free self-lubricating, acid, alkali and salt corrosion , wear resistance, low noise, insulating diamagnetic, since high-speed operation; metal nano-ceramic bearing its production process for a new generation of high content of nano-particles in the heat and pressure infiltration of metal surface is activated to fill the cracks and pits the metal so that 3-5 micron metal surface is more smooth solid surface, greatly reduce the friction, improve Chennai base metals, and greatly increased the life span of bearings, and its characteristics are: long life (as an ordinary stainless steel bearings 2 -- 10-fold), low noise (as an ordinary stainless steel bearings, 70%), wear-resisting, acid, alkali, salt corrosion, high temperature, load large; ceramic bearing and metal nano-ceramic bearing design and development to meet the needs of the market for high-speed, low - noise, high load, the demand for corrosion-resistant; Machinery Production Department to produce aircraft rod end joint bearing, linear guide bearings, the fuel tank of earrings, plastic bearing, non-standard side bearing components, glass door hardware, such as high-precision control products; and provide CNC machining.

陶瓷轴承可生产氧化镐、碳化硅、氮化硅等，内径从3mm-50mm，精度可加工P0、P6、P5级；其性能特点为：耐高温、无油自润滑、耐酸、碱、盐腐蚀、耐磨、低噪音、绝缘抗磁、起高速运转；金属纳米陶瓷轴承其生产工艺为新一代的高含量纳米级微粒在热和压力的作用下被激活渗入金属表面，填补金属缝隙和凹坑，使金属表面3-5微米表面更光滑坚固，大大降低其摩擦力，提高金属的奈酸碱性，并大大提高了轴承的寿命，其特性为：长寿命（为普通不锈钢轴承的2-10倍）、低噪音（为普通不锈钢轴承的70%）、耐磨、耐酸、碱、盐腐蚀、耐高温、负载大；陶瓷轴承与金属纳米陶瓷轴承的设计开发以满足市场对高转速、低噪音、高负载、耐腐蚀的需求；机械生产部以生产机杆端关节轴承、直线导轨轴承、油缸耳环、塑料轴承、非标端轴承零部件、玻璃门控五金等高精度产品；并对外提供数控加工。

PAN-ACF was modified by different methods, such as heat oxidation, nitric acid dipping and hydrogen peroxide dipping, the characteristics changes of the PAN-ACF before and after modification such as kinds of surface functional groups, amounts of oxygen function groups, surface microstructure and specific surface were analyzed by FT-IR, Boehm.

采用热氧化、硝酸浸渍、过氧化氢浸渍等方法对聚丙烯腈基活性炭纤维进行改性处理，使用FT-IR、Boehm滴定法、SEM、BET等分析技术表征了改性前后PAN-ACF表面官能团种类、含氧基团数量、表面微观结构及比表面积等表面特性。

In this paper, a simple, accurate and intuitionistic formula and method for calculating and analyzing the I-V characteristics of a pn junction is deduced. The method is used to calculate and analyze the I-V and RD-V characteristics of two typical HgCdTe loophole junctions. Some important parameters which reflect the characteristics of a diode, such as surface Ohm leakage conductance and the distribution of the ideal factor n with voltage are obtained.

本文推导了一种可简便、准确、直观计算和分析pn结I-V特性的公式和方法，并应用该方法对两类典型HgCdTe环孔pn结的I-V、RD-V特性进行了计算和拟合；得到了表面欧姆漏电导、二极管理想因子n随电压的分布等反映二极管结特性的重要参数。

Originated from Maxwells theory and Drude model, we discussed the physical modelof surface plasmon wave and surface plasmon resonance under different conditions.Specially of metal thin-film structure, we study the propagation characteristic of SPWintensively, and carry out theoretical simulations according to ideal model and practicalmodel respectively under different thickness of the film and the wavelength of probe beam.

在理论上，首先从电磁场理论和Drude模型出发，讨论了在各种不同情况下的表面等离子体波的物理模型，并且进一步深入研究了表面等离子体波共振现象，特别针对金属薄膜结构下的表面等离子体波的传播特性进行讨论，对不同的膜厚和入射波长的情况对理想模型和有损模型分别进行了理论的模拟。

A review of our research work is given in this paper. It is about strengthening mechanism; surface trobology; resistance in wear, oxidation and corrosion; thermal atom chemistry in steel during ion implantation; silicides synthesis.

综合评述了本课题组在金属离子注入钢强化机理、表面摩擦学、抗磨损特性、离子注入表面热化学效应、硅化物合成、表面抗氧化和抗腐蚀研究中所取得的新的实验结果。

Based on the current ultrasonic equipment for rail inspection,we can use ultrasonic subsurface longitudinal waves to inspect the surface cracks in railheads,and the potential of this method for complementing conventional ultrasonic rail inspection is discussed.

在现有铁路钢轨超声检测设备的基础上，可采用超声次表面纵波对钢轨表面裂纹进行检测。本文应用边界元方法对钢轨中的次表面纵波的传播特性进行分析并进行了实验测试。

Analyses factors which affect apparatus dew point by theory and experience. Points out that to a given surface air cooler, the relation between apparatus dew point temperature and entering air dry bulb temperature or entering cooling water temperature is linear under dry cooling conditions, and the relation between apparatus dew point enthalpy and entering air enthalpy or ...

指出结构特性一定的表冷器，干工况下冷盘管表面平均热状态温度和进风干球温度、冷水初温成线性关系；湿工况下在空调常用范围内，冷盘管表面平均热状态焓值和进风焓值、冷水初温成线性关系，且两种工况下冷盘管表面平均热状态温度都随迎面风速增大而增大，随水流速增大而减小。

Firstly,the general relation between radiated noise and surface vibration is established and the radiation ratio is discwsed.

首先阐明了发动机表面辐射嗓声和表面振动之何的关系并对辐射比进行了较为详细的讨论；而后通过实验研究了发动机各部件的表面振动特性。

The adsorptive properties of gas-liquid interface and liquid-solid interface of bisquaternary ammonium salt surfactant are used as object to study the surface tension of BQAS changing with its concentration,adsorptive isothermal line,saturated adsorption and minimum balance time.

以研究双季铵盐型表面活性剂BQAS吸附特性为目的，从溶液表面张力随浓度的变化、饱和吸附量等方面研究了双季铵盐BQAS的气液界面吸附特性；用双季铵盐BQAS和砂岩体系，在液固比一定时，从时间、浓度对静态吸附量的影响方面研究了双季铵盐BQAS的液固界面吸附特性。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。