压下的

This utility model disclosed a dust removal equipment, environmental protection, their characteristics is that, including filters, dust collection equipment and negative pressure ventilation machines, referred to the vertical filter settings are arranged in descending sequence multi-aperture filter, its Set large aperture filters connected at one end of inlet pipe, set a small aperture at one end of filters connected through the vacuum exhaust fan out of the wind pipe, dust collection equipment installed in the bottom of each layer filters.

本实用新型公开了一种环保除尘设备，其特征在于，包括过滤器、集尘装置和负压抽风机，所述过滤器内垂直设置有多层孔径依次从大到小排列的过滤网，其设置有大孔径过滤网的一端连接进风管，设置有小孔径过滤网的一端通过负压抽风机连接出风管，集尘装置设置在每层过滤网的下端。

Essential hypertension caused by neurovascular compression of the left ventrolateral medulla was associated with malbalance of vasomotor center in the dorsal medulla. The possible pathogenesis was the following:① An irritation of the left RVLM by pulsatile compression of an ectatic vessel would increase activity of central sympathetic neuron.② Neurovascular compression at the REZ of the cranial nerves Ⅸ and Ⅹ decreased excitation of parasympathetic nerve.③ Decreased sensitivity of afferent inputs to neuron of nucleus tractus solitarii in the sensory area lead to hyperactivity of central sympathetic nervous system due to pulsatile compression of the left RVLM.④ Neurocompression of the left RVLM and REZ in the left cranial nerves Ⅸ and Ⅹ lead to an overactivity of central renin angiotensin system.

3，结论：左侧延髓腹外侧Ⅸ、Ⅹ颅神经REZ动脉血管压迫所导致的高血压的发生与左侧延髓血管运动中枢对血压的调节失衡有关，其可能机制是：①左侧RVLM在搏动性血管压迫刺激下，中枢交感神经元活性增高；②左侧Ⅸ、Ⅹ颅神经REZ受压导致副交感神经兴奋性降低；③感受区孤束核神经元接受迷走神经传入冲动的敏感性减低，导致中枢交感神经活性增高；④左侧RVLM及Ⅸ、Ⅹ颅神经REZ受压引起中枢RAS活性增加。

Examination of the equilibrium status of a point in the salt water zone and the description of piezometric heads at two points ...

通过考察咸淡水界面之下咸水带任意点的压力平衡关系和咸水带及淡水带任意点的水头描述得知，当地下水流处于稳定状态且满足Dupuit假设时，可以根据同一垂直线上界面之下咸水带任意点的咸水测压水头和界面之上淡水带任意点的淡水测压水头确定滨海均质各向同性潜水含水层咸淡水界面的位置。

Examination of the equilibrium status of a point in the salt water zone and the description of piezometric heads at two points in both the salt water and fresh water zones reveals that the location of the fresh water-salt water interface in a coastal homogeneous, isotropic unconfined aquifer can be estimated based on piezometric heads at two points in the same vertical line tapping respectively the salt water zone and the fresh water zone (from the water table to the interface) when the groundwater flow system is in a steady state and satisfies the Dupuit assumption.

通过考察咸淡水界面之下咸水带任意点的压力平衡关系和咸水带及淡水带任意点的水头描述得知，当地下水流处于稳定状态且满足Dupuit假设时，可以根据同一垂直线上界面之下咸水带任意点的咸水测压水头和界面之上淡水带任意点的淡水测压水头确定滨海均质各向同性潜水含水层咸淡水界面的位置。

Based on plate-beam structure and layer-plate model, the time delay on sloughing rockburst in mines is studied.

研究表明，在压应力集中区内，近自由表面的裂纹在低侧压时，将平行于壁面沿最大压力方向扩展，在一定的压力下，受自由表面的影响，这种扩展是不稳定的。

Secondly, on the basis of research on construction technique, this paper gave some advice on improvements in condition of underplayed confined aquifer and sand.

在此基础上，结合工程实践针对有打穿下卧承压含水层及普遍存在夹砂层情况下真空预压法施工工艺中各个环节需要改进的地方进行了探讨，提出了一些改进建议。

When 20 kg acceleration is inputted, the potential distribution of piezoresistor device terminals,the corresponding stresses of the piezoresistive element and the current location are also obtained,which testifies the anti-over loading ability from the stress location in the fix-end cantilever.

在20kg加速度的输入下，得到了压阻块应力的分布，以及电流的大小及分布，和悬臂梁的应力大小及分布，验证了加速度计的抗过载能力。标签微机电系统压阻加速度计 MEMS piezoresistive accelerometer

The movement order is that the bag-catcher of the automatic bag-giving device sucks the empty bags on the first stack through the vacuum sucker and lifts it, with the clamping jaw of the clamping tower clamping the lifted empty bag and towing it on the bag-bearing platform of the bag-giving device. The bag central locator locates the empty bag into the center. Then the empty bag held in the center is moved horizontal and sent to the position of the bag-giving manipulator through the bag-shifting pressing wheel downward and bag-shifting synchronous belt.

其动作顺序为自动上袋装置的取袋器通过真空吸盘吸住供袋架上第一垛位的空袋并提起，夹拖器夹爪将提起的空袋夹住并拖至上袋装置支座架平台上，袋子对中器把空袋对中至中央位置，移袋压轮向下和移袋同步带把压持在中间的空袋平移送至上袋机械手位置。

Based on the characteristics of casing annulus gas-venting wells, the particularity of multi-phase flow in the condition that the casing-head gas flows through a nearly stagnant liquid was investigated. Based on the theory of Taylor bubble, a model to calculate void fraction and pressure gradient in various viscosity liquids was developed. This model is applicable to bubbly flow and slug flow.

以泰勒气泡在黏滞流体中的上升流速作为主要依据，建立了不同油黏度下套管环空放气流动的截面含气率和压降计算模型，并提出了不同黏度、不同气油比的套管定压放气井环空流动计算及套管压力分布的多相流模型，该模型主要适用于泡流和段塞流。

In a general way, auxiliary time is associated with the structure of filter press characteristics of slurry and application of automatic system, given thickness of filter chamber filtration pressure squeeze pressure, moisture of filter cake, we can regard it as a constant which is independent of production capacity.

众所周知，厢式压滤机一个完整的工作周期还包括滤饼卸除、滤布清洗和重装滤机等不产生滤液的辅助工作时间，在给定滤室厚度、过滤压力、压榨压力的情况下，就可以认为辅助时间是与压滤机的生产能力无关的一个常数。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。