How to choose rational heating period and cooling period so the residential environment is improved becomes a urgent problem to solve.
如何合理的选择采暖期和空调期天数,达到既满足热舒适性条件又节能是摆在人们面前的一个新课题。
The phase center of log-periodic antenna presents linear changes along with the frequency.
对数周期天线的相位中心随频率呈线性变化,用2个对数周期天线可以构成具有恒电特性的干涉仪天线阵,在工程应用中,天线相位中心较大的测试误差会导致天线阵调试困难。
In this paper,mixed potential electric field integral equation and the method of moment are used to analyze a vertical log-periodic antenna over ground plane.
采用混合位电场积分方程结合矩量法分析近地垂直对数周期天线,运用微波网络理论处理馈源问题,分别利用二级离散复镜像法和一种快速方法计算近、远场的Sommerfeld积分,较好地解决了分层媒质中电磁辐射与散射问题中的棘手问题,其方法简练,理论完备,结果与有关文献吻合良好,证实了该方法的正确性和通用性。
Using the advantages of the printed antennas,such as high precision and high consistency,combine the characteristics of ultra wide band of the log-periodic antenna,the analysis and design method of the monolayer log-periodic antenna are studied.
利用印刷天线制作精度高、一致性好的优点,结合对数周期天线具有超宽频带的特性,详细研究了单层印刷对数周期天线的分析与设计方法。
Research on Influence of Residential Natural Room Temperature on the Days of Heating and Cooling Period
住宅自然室温对采暖与空调期天数影响的研究
She used several tone of blue to make the sky look real.
她用了数种蓝色色调让天空看起来真实些。
She used several tones of blue to make the sky look real
她用了数种蓝色色调让天空看起来真实些
For hundreds of kilometers around the eruption and for perhaps days or weeks, pale-gray ash would fall like clumps of snow.
喷发处方圆数百公里内，连续数天或数星期，浅灰色的火山灰会一团团像雪一样从天空飘下。
These air conditioners should come down in winter.
冬天这些空调器应降价
There are innumerable stars in the sky.
天空中有无数颗星。
Billions of stars twinkled in the sky.
无数星星在天空闪烁。
She likes to lift up her eyes to the sky and count the stars.
她喜欢仰望天空数星星。
There are myriad flies in the sky.
天空中有无数的苍蝇。
The air conditioner dehumidifies the air in the summer.
空调设备在夏天使空气干燥。
It was so hot that we had to have the air conditioner on all day long.
天太热, 我们不得不整天开着空调。
Afterward, compass needles that normally point north would point south, and during the thousands of years of transition, much in the heavens and Earth would go askew.
后来，通常指向北方的罗盘针指向南方，而在数千年的转换期间，多数在天空而地球会倾斜。
I've got Friday and Saturday, and it won't be any trouble.
"我还有星期五和星期六两天空闲。
Unlike most other appliances, room air - conditioners are heavily dependent on weather for sales.That makes decisions on production schedules tough calls for the manufacturers.
室内空调与其它多数家电设备不同，销售量与天气息息相关。这使制商决定生产进度非常困难。
Numerical Investigation of the Parameters of Blower Intake Opening of Automotive Air-Conditioning
汽车空调鼓风机进风口参数数值研究
The electricity was cut off this morning, so the air - conditioning can not work .
今天早上停电了，空调机无法工作。
Do you remember the day our air conditioner broke Down?
你还记得咱们空调机坏了的那一天吗？
Heaters and airconditioning mastered weather for us.
加热器和空调系统为我们控制天气。