混频器主结构采用两只对称的单平衡混频器组合，通过上下两路信号移相来达到消除镜频的目的。
The main structure of the mixer adopts two symmetrical single-balanced mixers, with phase-shifting of the up and down path signals to eliminate the image frequency.
系统的成功开发还将解决以往税务机关与纳税人之间，上下级之间和税务机关之间存在的信息不对称问题。
The successful development of the system will be resolved between the tax authorities and taxpayers, and between higher and lower levels of information asymmetry that exists between tax authorities.
在3g移动通信系统中，主要业务是上下行速率严重不对称的多媒体数据业务。
In 3g mobile communication systems, main services are multimedia data services, of which the traffic is seriously asymmetric between uplink and downlink.
所得结果定量地阐明了波剖面的非线性上下不对称性对波动场统计特征的影响。
These results quantitatively expound the effect of the nonlinear up-down asymmetry of wave profile on the statistical properties of the wave field.
在现有研究成果的基础上，对闸站平面不对称布置枢纽上下游水流流场的数值模拟方法进行了探讨。
Based on available research results the author probes into the numerical modeling of velocity field of upstream and downstream flow of project with asymmetric plan layout of gate and plant.
对称粘贴在梁结构上下表面上的压电元件在外部电场的作用下能使梁结构发生弯曲变形。
The rectangular beam with dual surface bonded piezoelectric actuators can achieve a pure bending deformation by an external electric field.
针对我国国有商业银行上下级银行之间信息不对称的特点，综合利用层次分析法和灰色系统理论，建立了对基层商业银行经营效果评价的综合体系。
Aiming at the information asymmetric character of the state-owned commercial Banks, grey system theory and AHP were combined to put forward a comprehensive evaluation system for the Banks.
在轴对称的实验装置上，对上下施加侧压的中心开孔的含瓦斯煤饼，将孔内压力突然降至大气压，求得煤样在侧压和瓦斯压力联合作用下的临界破坏条件。
The pressure was then suddenly released in order to find out the critical condition of failure under the combined effect of confining pressure and pore pressure.
采用水平卧式浇注，铸件对称的两边收缩率基本相同；而采用垂直立式浇注，铸件对称的上下收缩率相差较大。
The contractive rates on both sides in symmetric part were basically of the same for horizontal pouring while of extreme difference for vertical pouring.
对称窗口指上下文边界与歧义词的左右距离相等，大部分消歧系统凭经验将其作为最优的局部上下文窗口，很少选择非对称窗口。
Most systems choose optimal local context window on empirical grounds, which is usually symmetric, the same distance from the ambiguous word to both sides of the window.
该电流在上下桥的阀侧绕组中表现为不对称的两相负载运行。
The harmonic current in the windings on the line side under practical running condition is analyzed.
当至少安装两盏石英灯时，所述至少两盏石英灯以杯体的上下中 心线为对称轴对称安装；
When installing at least two quartz lamps, the at least two quartz lamps are equipped symmetrically to the vertical central line of the cup body and connected in series or parallel.
当至少安装两盏石英灯时，所述至少两盏石英灯以杯体的上下中 心线为对称轴对称安装；
When installing at least two quartz lamps, the at least two quartz lamps are equipped symmetrically to the vertical central line of the cup body and connected in series or parallel.
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