特性

Hexagonal nano-silicon carbide thin films doped and undoped with phosphorus which possess a characteristic of the ultraviolet photoluminescence have been deposited by helicon wave plasma enhanced chemical vapour deposition technique under the high hydrogen condition in this work. The optical and electric properties of the doped nano-SiC films together with the electric and photovoltage properties of the n-p nc-SiC/Si heterojunction is studied and analyzed.

本工作利用螺旋波等离子体化学气相沉积技术在高氢气条件下制备了具有紫外发光的六角晶型纳米碳化硅，对这种材料进行了不同比例的磷掺杂，并对这种掺杂的纳米碳化硅的光学、电学特性以及nc-SiC/Si异质结的电学特性和光电压特性进行了研究。

In order to understand the relationship between dielectric properties and sugar content of juices, dielectric properties of juice of three honeydew melon cultivars and four watermelon cultivars with different maturities were measured with an open-ended coaxial-line probe and impedance analyzer over the frequency range from 10 MHz to 1.8GHz. Soluble solids content of fruit juice and moisture of fruit pulp were also measured. The correlation between dielectric properties and soluble solids content was analyzed.

为了解果汁的介电特性与其主要内部品质——糖度之间的关系，该文利用末端开路的同轴探头和阻抗分析仪测量了10 MHz～1.8 GHz的频率范围内不同成熟度的3个品种密瓜汁和4个品种西瓜汁的介电特性，同时测量了反映果汁糖度的可溶性固形物含量和果肉的含水率，分析了介电特性和糖度间的关系。

The stability criteria on the hydrostatics theories are used to estimate whether aship in the heavy seas capsize or not,this method ignores the time domaincharacteristics, frequency characteristics and the randomicity of ship motions. Thecapsizing accidents occur now and then although ships are designed according tostability criterion. So, it is also the important problem for human beings to investigatethe nonlinear characteristics of ship motions and evaluate the survival ability of ships.

目前的稳性标准是根据流体静力学理论来评判船舶在风浪中的安全行为，这种方法忽略了船舶运动的时域特性、频域特性及随机性，按照目前稳性规范设计的船舶仍然时有倾覆发生，因此研究船舶的非线性运动特性和评估船舶航行的生存能力，仍然是人类面临的重大课题。

By analyzing beam elements characteristics running on idler and pulley, adding belt viscous-elastic behavior and resistance behavior, and combining take-up model and reasonable boundary, it obtained belt dynamical equations in two-dimension model.

通过分析梁单元在托辊及滚筒上的运动特性，结合输送带的粘弹特性、运行阻力特性等参数的影响，再结合拉紧装置的振动特点及合理的单元边界条件，得到了输送带二维数学模型的动力学方程。

We can use mathematical model of water quality in forecasting the infection of nature course and human activity to the water.

水质模型提供了一种预测自然过程和人类活动对河流水库系统中水的物理特性、化学特性和生物特性影响的手段，广泛应用于评价来自废水处理的废水负荷的影响，或者来自其它各种点源和非点源污染物负荷的影响。

Because young children could not understand the class inclusion relation,they always drew wrong conclusions about super-class from sub-class in their classification.

类别等级的不对称性是幼儿最难掌握的特性，由于他们不能掌握类别的包含关系，幼儿常常错误地根据子类的特性推论总类的特性。

Through the study to the vortex theory, especially the mathematical model of Burgers vortex, we have got some factors, which affect the oil indraft performance of the device qualitatively. The main factors are principal axis rotation speed, structure dimension of whisk impeller and drainage impeller, installed positions of whisk impeller and characters of spilled oil.(3) According to the analysis of impact factors, from simple to complexity, we have done the experiment study to the artificial-jellyfish device by three steps.

2通过对Burgers涡数学模型的重点研究，对溢油回收人工水母装置吸油特性的影响因素进行了定性分析，得出了影响人工水母装置吸油特性的主要因素，主要影响因素有；装置的主轴转速、搅拌叶轮和排水叶轮的结构尺寸、搅拌叶轮的安装位置以及溢油的自身特性等。

Thus, the purpose of inferential statistics is to predict or estimate characteristics of a characteristics population from a knowledge of the characteristics of only a sample of the population.

因此， 学区的比例了。因此，推理统计学的目的就是通过了解一个群体中一些样本的特性，体中一些样本的特性，从而对整个群体的特性进行推测和估算。

The axial and bending characteristis models the of the pneumatic pressure artificial muscle actuator were set up according to the energy conservation law and the infinitesimal deformation theory respectively, and simulation researches and experiments had been done for the characteristics of the actuator.

论文基于能量守恒与转换定律及最小形变原理建立了空气压人工筋驱动器的轴向驱动力学模型及弯曲转向特性模型，仿真计算了人工筋驱动器的驱动力学特性及弯曲转响特性，通过实验研究对理论模型进行了实验验证。

A series of researches have been developed on cathode design, process control and machining gap control etc. Several results that are valuable to applications and instructively significant have been gained.PECM is a new technology that the pulse power, especially the high frequency and short pulse current power, is applied and the traditional direct current power is replaced instead.

脉冲电化学加工是用脉冲电源代替传统的直流电源，尤其是高频、窄脉冲电流的引入，使脉冲电化学加工中间隙过程的电化学特性、流场特性和阳极溶解特性等都得到了很大的改善，其加工精度、表面质量和加工效率都有了很大的提高。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。