查询词典 back flow

It prevents any back-flow up the drill pipe.

它防止钻杆里的任何向上回流。

While the intake valve events can alter the effective compression ratio and back flow of intake charge.

其压缩效果受记录限和压缩区间的影响。

In order to control the flow separation by reducing the diffusion factor and enlarging the diameter of inner circle, the meridian plane profile of the return channel was redesigned, which is achieved by substituting arbitrary curve for the circle with no change of the axial length of the stage. Bezier curve with eight parameters was chose to describe the shape of meridian plane profile, and the optimization of the meridian plane profile was implemented combining back-propagation neural network with genetic algorithm.

改进的主要思路是减小弯道前半部分通道的扩压度，并同时加大弯道出口内侧的转弯半径，主要做法是在不增加整级轴向尺寸的前提下，用任意曲线取代传统弯道的同心圆环结构，给定弯道回流器子午型线的外侧型线，采用Bezier曲线对内侧型线的2段曲线进行参数化描述，利用遗传算法和反向传播(back-propagation，BP)神经网络相结合的方法对内侧型线进行优化，得到新的弯道回流器子午型线。

Do not squeeze the semen as this increases the risk of back flow.

不要挤压的精液，因为这增加了回流的风险。

The flow characteristics of surface singular point, seperation lines, re-adhesional lines, low speed back-flow area of the impeller and back-flow area at the impellor's inlet were revealed.

揭示了额定流量与小流量时叶轮的表面奇点、分离线、再附着线、低速回流区和进口回流等流动特征，进而提出了改进螺旋离心泵设计方法与结构的设想。

Experiments exposed that the inner flow of tooth space in the micro-channels was proved to be cycled flow after fully development. For the more, low velocity vortex cavities existed in the vertex angle and inner side of bend angle of straight angle micro-channel, while back flow only appeared in the internal side of bend angle of round angle micro-channel. It's easy to take place deposition in the low velocity vortex cavities, which is the main cause of blocking.

试验发现各类微通道齿间内流充分发展后是一种重复性流动，平角微通道顶角和转角内侧存在低速涡旋区，圆角微通道只在转角内侧出现回流，颗粒在低速涡旋区易发生沉积，是造成堵塞的主要原因。

A pair of symmetrical wave interfaces separates the viscous boundary layer with back flow and the inviscous core flow.

一个波状的分界面将带有回流的粘性边界层与中心的无粘主流区分开。

The flow regimes of all kinds of inlets and chambers, the pattern of lower stream current accouplement, the velocity distribution, the status of lower stream current back flow and tail water fluctuation are mensurated in details.

测定各种进口流态、闸室流态、下游水流衔接流态、流速分布以及下游回流和尾水波动状况。

Preventionof back-flow of air prevents the hydrogen fuel system from backfiring,which is another common problem of hydrogen fuel systems.

防止回流的空气，防止氢燃料系统从回火，这是另一个常见的问题，氢燃料系统。

GFC is composed of flow-control mechanism and feed-back mechanism. The former mechanism allocates the bandwidth and schedules the delivery of packets based on the priority of the data and the length of the sending queues; the latter mechanism emendates and adjusts the traffic control parameters based on the feed back information of the TCP.

该算法由流控机制(Flow-ControlMechanism)和反馈机制(Feed-Back Mechanism)两部分组成，流控机制根据组播报文的优先级和长度对各个发送队列中的报文进行带宽分配和发送调度；反馈机制基于TCP的反馈信息对流控参数进行实时校正和调节，进而有效地减少报文的丢失率。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。