查询词典 parabolic curve

The traditional analog frequency-sweeping instrument, which mostly uses the LC circuit as the frequency oscillator, is more expensive, too much bigger and heavy to carry. It can only display the curve of amplitude-frequency, but can't used to measure the phase-frequency, and can't used to print the curve of frequency response characteristic either. It brings many discommodity to the user.

传统的模拟式扫频仪大多是用LC电路构成扫频振荡器，它不仅价格昂贵，体积庞大，而且只能显示幅频特性曲线，不能得到相频特性曲线，更不能打印被测网络的频响曲线，给使用者带来诸多不便。

Its level replication, you can reproduce the curve image adjustment of different hierarchical distribution curve.

其层次复制再现曲线，可根据图像层次分布曲线不同调整变化。

The pitch model of disyllable in Mandarin has been systemically studied on the basis of real materials of disyllable words through the techniques of polynomial curve fitting and VQ. The results show:(1)It is a practical and effective method in establishing the pitch model of disyllable through the techifiques of polynomial curve fitting and VQ.

本项研究从实际语音材料出发，运用曲线拟合和矢量量化的方法，对汉浯双音节调位的模型进行了系统地研究，研究结果表明；(1)利用曲线拟合和矢量量化技术对汉浯双字词声调组合进行模式归类是一种可行和有效的方法。

The divisor class group, often called Jacobian group, based on which hyperelliptic curve cryptosystems are constructed, is much complicated than the elliptic curve rational point group.

但由于可以在一个很小的基域上构造具有较大素数因子阶的Jacobian群，且可应用于密码体制的超椭圆曲线比较丰富，这使得超椭圆曲线密码体制也逐渐受到人们的重视。

Doffer s arranged on the steering cylinder according to space envelope curve make the structure more compact, and belt track coincides more closely with the surface curve, which makes belt conveyer running drag coefficient decrease.

在一个运输系统中，以往由于运输巷道有变坡而必须用多台带式输送机搭接运输时，最适合采用本压带装置，可实现省工、省电、省设备，省安装。省电控见图

This paper introduces the real number domain and limited domain of the definition of Elliptic Curves, it introduces the basic principles of Diffie-Hellman key exchange in detail which bases on the definition of Elliptic Curve Cryptosystem, and the methods of implementation which makes use of Elliptic Curve. It analysis the advantages and disadvatages of the Diffie-Hellman key exchange technology , and gives a worthwhile improvement in the same time.

本文介绍了在实数域和有限域中椭圆曲线的基本定义，然后以椭圆曲线的基本定义为基础，详细论述了基于椭圆曲线密码的 Diffie-Hellman 密钥交换的基本原理及利用椭圆曲线实现密钥交换的方法，分析了Diffie-Hellman 密钥交换技术的优缺点，并给出了值得改进的地方。

On the generation principles of the special double point of coupler curve,the paper analyzed double point of the coupler curve.

从连杆曲线特殊二重点的产生机理出发，研究具有实二重点轨迹特征的连杆点位置。

The paper also discusses the extreme cases and the principle of duality in Indifference curve and Isoquant curve.

文章还讨论了无差异线和等产量线的极端化情形及其对偶^***。

Secondly,concerning Kolmogorov model and generalized Kolmogorov model with variable harvesting rate,this paper utilizes Dulac function to judge the existence of the close path curve,Bendixson cycle region to judge the direction of path curve,and constructs Lyapunov function to judge the global stability,in order to fit the general models.

对于三维种群模型，讨论了一类具有功能性反应的三种群模型在具有收获率的条件下的定性性质。

The precipitation efficacity showed multi-index curve relationship with the soil water content and precipitation in the base period and the evaporation efficacity showed index curve relationship with the soil water content in the base period.

降水效力与基期土壤含水量、降水量呈多元指数曲线关系，蒸发效力与基期土壤含水量呈指数曲线关系。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48