阻塞比

当障碍物间距为一倍管径时爆震起爆距离最短，随着障碍物阻塞比的增加爆震距离也减小。

DDT distance is minimized when obstacle spacing is roughly equal to one combustor diameter , DDT distance decreased with increased blockage ratio .

热量的积聚与列车隧道系统阻塞比的关系非常大，隧道内热效应受到列车速度的影响仅次于阻塞比，改变列车头部形状，也可改变释放到隧道内的热量。

The heat-accumulating in long tunnel is more related to blockage ratio . Train speed is next to blockage ratio in influencing thermodynamic effect . As train nose shape varied , quantity of heat released into the tunnel space will be changed too .

通过改变阻塞比和车速分析管内热边界层效应和流动阻力特性。

Thermal boundary layer effect and flow resistance properties are analysed by changing the block ratio and speed tube .

影响流动的主要因素是通道的阻塞比、长径比、宽高比、气膜出流比和进口雷诺数。

Flow process was controlled by factors such as choke ratio , width to length ratio , the ratio of film outlet to the main flow and the inlet Reynold numbers , etc.

试验表明：尖劈利用其迎风平板的分离流产生湍流涡旋，迎风板的宽度决定了涡旋的大小和湍流脉动强度，同时迎风板阻塞比沿高度递减产生近似线性的风速剖面；

Some tests show that spires behave as vortex generators by flow separation on the edges of their windward plate , meanwhile , their linear decrease of blockage with height brings about a corresponding linear wind profile downstream .

对于本文实验，结果表明：（1）在相同阻塞比条件下，平板、三棱柱对火焰传播速度和火焰传播引起的超压影响较大，长方体次之，四棱柱、圆柱最小。

The results show below : 1 . Under condition of the same blockage ratio , plates and triple prisms have the most influence on flame propagation ( flame velocity and overpressure ) , while cylinders and Quadruple prisms have least influence on flame propagation .

通过模型试验和数值计算得出初始压缩波的最大压力值和最大压力梯度值和列车速度、隧道阻塞比、车头长细比之间关系。

Through the digital simulations and model testing , maximum initial micro-pressure wave and pressure gradient were investigated . The relationship among the maximum pressure , pressure gradient , train speed , train / tunnel area ratio , train nose length / height ration is obtained .

最后通过阻塞比为0.13及0.21，列车速度为500km/h的工况为例，预测了寒区高速铁路隧道在二十五年间长期连续不断地运营后，隧道内温度的升高以及围岩温度场的变化。

With the simulation results of blocking ratio 0.13 and 0.21 , train speed 500km / h , the temperature change in tunnel space and the temperature field of surrounding rock is predicted after twenty five years successive train movements in cold region high speed railway tunnel .

在实际运行中，液气压力比必须大于流量阻塞压力比，才能确保安全可靠运行，否则废液喷嘴极有可能烧损。

In practical operation , only when the pressure ratio of oil to air is larger than the critical pressure ratio of discharge clogging , the operational safety of the nozzle can then be ensured , otherwise the nozzle will probably be burned up .

为了评估多层恢复与多层路由的网络整体性能，提出了多层恢复的路由相关性，并以阻塞恢复比作为评价指标。

In order to evaluate the total performance of multilayer restoration and routing , the correlation between multilayer restoration and routing was proposed in this dissertation . A new variable , blocking probability to restoration probability ratio ( BRR ), was introduced as the evaluation index .

从仿真结果生成的时空图上我们可以看出，本文模型所生成的时空图所出现的阻塞相要比NS模型所出现的阻塞相平缓。

We can perceived from the time-space diagram , that the jam phase which is generated by this method is more gentle than the jam phase generated by the NS modal .

仿真结果表明，ATP算法比传统的保护算法具有更低的阻塞率，比传统的共享子通路保护算法具有更低的时间复杂度，尤其在网络资源丰富时，这种优势更为明显。

The simulation results show that ATP algorithm has a lower blocking ratio than traditional protection algorithm and also has lower time complexity than conventional sub-path protection algorithm . In addition , the advantage of ATP appears more obvious especially when network resource is rich .

非阻塞算法要比基于锁的算法复杂得多。

Nonblocking algorithms tend to be far more complicated than lock-based ones .

急性肠系膜动脉血栓和非阻塞性肠系膜缺血比肠系膜静脉血栓更致命。

Mesenteric venous thrombosis is much less lethal than acute thromboembolism of the superior mesenteric artery and NOMI .

被药物涂布支架撑开的阻塞动脉，应该比单用金属架更能防止动脉血管的重新阻塞。

Clogged arteries propped open with drug-coated stents are less likely to re-clog than those supported by bare-metal stents .