Heat from the surface rises into the atmosphere and creates an area of low pressure above each Pole. 陆地表面的热量上升到大气层中并在极地上空形成低气压。
They link shifts in an area of low pressure that follows the equator, known as an intertropical convergence zone, with weakened monsoon rains in winters during the eighth and ninth centuries. 科学家们将八、九世纪的热带辐合区(赤道附近的低气压区)转移同减弱的冬季季风降雨相联系。
Field practice shows that the method of making loose blasting deeply in the area of the mining abutment pressure can control the entry floor heave effectively and meet the need of the production. 现场实践表明,采用底板支承压力区进行深部松动爆破能有效控制回采巷道底鼓,满足生产需要。
The air outside the engine tries real hard to move into the area of negative pressure in the cylinder. 通风在外边发动机尝试真正艰难进入负压的地区在方面汽缸。
A broad area of low pressure is expected to move towards to Luzon Straitand affact southern China next week. 一个广阔低压区正在趋向吕宋海峡,并于下周初靠近华南及为该区带来不稳定的天气。
A small but strong area of low pressure continues moving across the region centered on Hualien. 一道虽小犹强的低气压继续移往以花莲为中心的区域。
The central area or place of lowest barometric pressure within a storm. 在一次风暴中的中心区域或大气压力最小的区域。
In meteorology, depression is an area of low atmospheric pressure with associated weather phenomena. 在气象学中,低气压是一个与气候现象有关的低气压领域。
The Study on Geographical Distribution of the Foreign Service and Regional Atmosphere of the Late-Qing Dynasty; the central area or place of lowest barometric pressure within a storm. 晚清驻外使领地理分布与区域风气研究在一次风暴中的中心区域或大气压力最小的区域。
Research on the Control Area of Pressure Line of Eight-Shaped Rigid-Frame Arch Bridge 八字形刚架拱桥的压力线控制区研究
The same period, the Ocean Thermal slow, relatively high temperature, air density changes smaller solipsism relative area of low pressure. 同一时期,海洋散热较慢,温度相对地较高,空气密度变化较小,遂形成相对的低压区。
The conveying parameters were relatively optimized by adjusting the throat area of adjustable Laval nozzle and pressure parameters, so that the foodstuff particle breaking rate during pneumatic conveying was decreased at certain extent. 通过调节可调式拉法管的喉径以及各压力参数实现了输送参数的相对最优,在一定程度上减轻了粮食颗粒在输送过程中的破碎率。
Using established model of different typical reservoir in old area can predict changes of pressure and recovery in stable period and decline period on different speed of gas production. 利用老区不同类型气藏的已建模型,对新区不同采气速度下,稳产期和递减期地层压力的变化规律、最终采出程度的大小进行了预测。
When extensor tendon tractive force acted at introversion posture, the upper area of medial condyle displayed pressure stress stripe while the upper area of lateral condyle displayed pulling stress stripe. 内翻位伸肌腱作用下,肱骨外侧髁上部为拉应力条纹,内侧髁上部为压应力条纹。
First extremum area of pore pressure concentrated at fault extreme, then turned to middle of blocking part according to fault creeping in earthquake preparation. 孕震过程中孔隙压的极值区最初集中在断层端部,而后随着断层的蠕动向闭锁段中部发展。
For retrieving coal column of mining area in the mine of impact pressure in the coal enterprise offers the experience, takes on popularity value. 为煤炭企业冲击矿压矿井回收盘区煤柱提供了经验,具有推广价值。
The east part of the Wushi Sag could develop giant oil and gas fields, it has excellent conditions of hydrocarbon source and seal, and a big area of abnormal pressure compartment formed by the three layers pressure structure. 乌什凹陷东部烃源条件良好,盖层发育,中、新生界具有3层压力结构,深部存在区域性的异常压力流体封存箱,是富集形成规模大的油气藏的有利区域。
The near-source slop area of deep and semi-deep lake facies is the most favorable accumulation area of abnormally high pressure oil-gas pools. 深&半深湖相的近物源斜坡区为最有利的高压油气藏富集区。
The results show that the system working pressure is the most important factor to these outer atomization characteristics and 8-9 MPa is the appropriate area of stable atomization pressure for this prototype of direct jet atomizer. 认为8~9MPa是所设计喷嘴的最低稳定雾化工作压力区域。
83001 excavating area of Laohutai Coal Mine, Fushun, were measured with electromagnetic radiation technology. The paper analyzed the electromagnetic radiation regularities and stress distribution of this excavating area. Based on that the key area of shock pressure in coal mine are determined. 以抚顺老虎台矿83001采区煤岩体的电磁辐射为例,分析了采区煤岩体的电磁辐射与应力分布规律,并以此确定了冲击矿压防治的重点区域。
The effect of the different aperture size and the area of the membrane, operation pressure were studied. 实验中比较了不同膜管孔径、膜管面积、操作压力等对乳酸杆菌发酵液浓缩效果的影响。
RESULTS: The expression of TGF-β 1 was demonstrated in the area of tension and pressure of periodontium tissue in both of the irradiated and control sides. 结果:未加力组与加力各组牙周组织的张力区和压力区中TGF-β1均有表达。
Experimental research and computer simulation tracing on fatigue propagation of surface cracks in non-orthogonal nozzle area of a real pressure vessel had been developed, and the characteristics, shape, rate and life of fatigue crack propagation of non-orthogonal nozzle area were obtained. 对一台压力容器非正交接管区表面裂纹的疲劳扩展进行了试验研究和计算机模拟跟踪,获得了非正交接管区表面裂纹疲劳扩展的特性、形貌、速率及寿命。
Late pool forming periods and the Tertiary undercompacted mudstone forming large area of pressure sealings are advantageous to the preservation of natural gas. 成藏期晚和第三系欠压实泥岩形成大面积的压力封盖,有利于天然气的保存。
By the comprehensive results of abutment pressure distribution simulated with FLAC~ 3D and fracture zone of surrounding rock detected by the ground radar, the peak and the decline area of abutment pressure in isolated coal pillar are determined. 采用FLAC~3D软件模拟了孤岛工作面侧向支承压力的分布规律,并利用雷达探测研究了塑性破坏区沿倾斜方向的变化规律。
Using explicit time-integration method and penalty contact algorithm, the process of contact mechanics between multi-core wire bunch and pressure connected terminal was simulated dynamically, and by means of connection area of pressure connection, the stability of its electronic information or power transmission was evaluated indirectly. 以显式时间积分法和罚接触算法,动态地仿真多芯线束与压力连接端子间的接触力学过程,并通过压力接触连接面积,间接地评价其电子信息或电力传输的稳定性;
The vortex area of the pressure face and the suction face and axial flow loss curve from 0.3 Mach number began to be weaken, then after 0.4 Mach number the trend is obvious. 吸力面、压力面上漩涡区域和轴向流动损失曲线显示从0.3马赫开始减弱,在0.4马赫数以后较为明显。
Pressure drop is mainly distributed in the orifice, there is an obvious area of low pressure near the orifice, and the opening degree is smaller, the greater the low pressure, the greater the pressure difference, the greater the low pressure. 压力降主要分布在节流口处,在节流口附近有一个明显的低压区,而且开口度越小,低压越小;压差越大,低压越小。
Objective: To study Uncaria and its extracts to the effects of blood pressure from normal animals and hypertensive model animals, screening effective area of Uncaria with blood pressure lowering through the combination of to pharmacological experiment and high performance liquid chromatography. 目的:研究钩藤及其提取物对正常动物及高血压模型动物血压的影响,以药理实验结合高效液相色谱法筛选钩藤降血压有效部位。
The results show that the pressure near wells in consideration of slippage effect is higher than that without considering of slippage effect, distribution area of the effect pressure also bigger than that without considering of slippage effect. 其结果表明:在井周附近,考虑滑脱效应的压力要比不考虑滑脱效应的压力大,影响压力分布的区域也比不考虑滑脱效应的范围大。