查询词典 operators

The negative answer to Halmos Problem 5 make it desirable to describe symbols of subnormal Toeplitz operators and hint that it is worth to begin with the hyponormality .

Halmos第五问题的解决使得刻划次正规的Toeplitz算子成为一个有意义的难题，并且暗示应当从研究亚正规着手。

In this paper,we make a summary of research about normality subnormality and hyponormality of Toeplitz operators .

本文首先对关于Toeplitz算子的正规性、次正规性和亚正规性的研究做了一个总结。

Such a migration from free to fee has worked before, when cable operators introduced a subscription model to television.

在有线运营商引入电视订购模式的时候，从免费到收费的转变曾经奏效过。

Other subvention reforms included the implementation of the final phase of the Service Performance Monitoring System and a new framework for selecting operators of new welfare service units, which placed emphasis on quality, innovation and value for money.

资助制度的其他改革项目还包括推行最后阶段的服务表现监察制度。此外，社署也引入一套新制度，挑选营办者营运新的福利服务单位，以确保服务质素、力求创新和符合经济效益。

Our methods are based on the the surjection of maximal monotone operators and the critical point theorem of convex functionals.

本文主要利用极大单调算子满射原理和凸泛函临界点理论对半线性抛物型方程在各种控制下的能控性进行了研究。

Based on the surjection of maximal monotone operators, we prove that some semilinear heat equations with weak Lipschitz nonlinear terms are exactly controllable by L〓 0, T: H〓(Ω control; Based on the critical point theorem of coercive convex functionals, we prove that some parabolic equations with Lipschitz nonlinear terms are globally approximately controllable and finite-dimensional exactly controllable by controls acting on mobile supports, and finally, we extend the results to parabolic equations in R〓.

首先利用极大单调算子的满射原理证明了半线性热方程在较弱Lipschitz条件下可通过L〓0.T；H〓(Ω控制实现精确能控。然后通过构造强制凸泛函并利用其临界点理论证明了带Lipschitz非线性项的抛物型方程可通过作用在在移动支集上的控制来实现整体近似能控与有限维精确能控，最后将整体近似能控与有限维精确能控结论推广到无界区域R〓上。

It was run by cynical operators and peopled by surly subjects.

它的统治者怀疑一切，而它的国民性格阴郁。

There is no temporary or long-term license for port operation in the Provisions, the administrative departments of ports at all the regions shall handle it according to Article 17 of the Provisions on the suspension of business operation or shutting up shop of relevant port operators.

规定》对港口经营许可没有设定临时和长期，各地港口行政管理部门应按照《规定》第十七条有关港口经营人停业或歇业的规定办理。

Kant believed that all the possible propositions within Aristotle's syllogistic logic are equivalent to all possible judgments, and that all the logical operators within the propositions are equivalent to the moments of the understanding within judgments.

康德认为在亚里斯多德的演绎逻辑范围内的所有可能的命题就是所有可能的判断，这些命题中的所有逻辑运算符号都是判断中知性环节。

Kant believed that al l the possible propositions within Aristotle's syllogistic logic are equivalent to all possible judgments, and that all the logical operators within the propositions are e quivalent to the moments of the understanding within judgments.

康德认为在亚里斯多德的演绎逻辑范围内的所有可能的命题就是所有可能的判断，这些命题中的所有逻辑运算符号都是判断中知性环节。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。