In order to design the quantum point contact ( QPC) devices based on the semiconductor heterostructure, electrostatic potential distribution and control methods of the QPC are needed to be considered.

Self-consistent solving the coupled Poisson and effective mass equations is based on the finite difference method, so the distribution of QPC electrostatic potential and electron density is acquired.

本文采用有限差分算法，对有效质量方程和泊松方程进行了准3D自洽求解，得到了QPC静电势和内部电子密度的分布。

The simulation of total energy flow and the density of states show that the dodecagonal QPC has photonic gap for TM polarized electromagnetic waves.

能流和态密度的计算结果都表示十二重准晶光子晶体具有光子带隙。

Then, we study the dynamics of a single electron spin in a DQD and its readout via QPC.

接着，我们重点研究了在耦合双量子点系统中单个电子自旋的动力学及如何通过运用一个量子点接触器件读出它的白旋状态。

If this should the speaker might feel down in the mouth.

话句话说他们会为说错话感到难过.

The crowded, noisy city, always make me feel down.

拥挤 、 喧闹的城市总让我感到情绪低落.

If this should happen, the speaker might feel down in the mouth.

如果发生这种情况, 这个发言者可能会感到沮丧.

Our company has broken the record for best daily steel output today.

我公司今天打破了日产钢铁量的最高纪录.

In recent years, with the development of modern manufacturing, materials and processes are required for the continuous improvement. Quick plastic forming ( QPF) technology of magnesium alloy have become a hot spot in manufacturing.

随着现代制造业对材料和工艺要求的不断提高，近年来镁合金的快速气压胀形工艺已成为加工界的热点。

Calculation and Analysis of 25 Inches QPF Dynamic-Focus Electron Gun

25英寸QPF动态聚焦电子枪的计算和分析

There is EVA Air and Japan Asic Airy way . Which one would you prefer?

有长荣和日亚航,您想订哪一家的?

I prefer JAA. Their service makes me feel more comfortable.

日亚航,您想订哪一家的?

Please apply this medicine two or three drops to the eyes three times a day.

请把这药往眼里滴两三滴,一日三次.

Put this lotion on three times a day.

用这种药水涂抹,一日三次.

One tablet each time, three times a day after each meal.

一次一片,一日三次, 饭后服用.

This medicine is to be taken three times a day meal.

此表须用墨水填写.此药一日三次,饭后服用.

Once-daily sulfonylureas should be an available option where drug concordance is problematic.

如果有药物依从性的问题时,一日一次的磺脲类药物是个比较合适的选择.

Whats the fare of one-day tour?

一天的旅游要多少钱?

You mean the one-day tour by bus?

您是说公共汽车一日游 吗 ?

They set out for London on a one-day trip.

他们出发去伦敦一日游.

And secondly , the day, day the city and other-distance travel by tourists.

其次,区内一日游 、 市内一日游等短途旅游受到游客欢迎.