查询词典 velocity ratio

Through the test on physical properties of snow and ice, the free-area ratio, the snow-melting velocity and the snow-melting time, the melting behavior of snow and ice under different weather conditions are obtained and compared with simulated results.

在此基础上，提出了一种有利于系统节能的折中加热方案。3道路融雪实验研究建立了一个小型道路融雪实验系统，采用基于径向热流的直接加热法获得了水泥混凝土路面的导热系数，并初步分析了含水率对路面传热过程的影响。

Bring forward optimum scheme of horizontal eddy flow discharge grotto in the right-bank of Gongboxia hydropower station, at the same time analyze the hydraulics characteristics of horizontal eddy flow discharge grotto in the Gongboxia hydropower station, for example flood discharge capacity、baffle ratio、exchange gas capacity、distribution of gas chroma、distribution of velocity of flow、average stress per time and distribution characteristics of fluctuation pressure and so forth.

提出了公伯峡水电站右岸水平旋流泄洪洞的优化方案，同时通过试验详细分析了公伯峡水电站水平旋流泄洪洞的水力学特性，如泄洪能力、消能率、通气量大小、掺气浓度分布、流速分布、时均压力和脉动压力分布特性等。

The method solves the problems better through adopting the following technical proposal that: the method takes the solid super acid consisting of the VIB group elements or the VIB group elements and the IVB group elements in the periodic table of elements and loaded on a symbiosis molecular sieve as catalyst, and naphtha with the component being C4-C10 as a raw material so as to carry out catalytic cracking reaction at a temperature of between 550 and 700 DEG C, under a pressure of between 0.01 and 0.5 MPa, at a reaction weight space velocity of between 0.1 and 4 hours and with the weight ratio between water and naphtha of between 0.5:1 and 4:1, thereby generating ethylene and propylene.

本发明涉及一种催化裂解制乙烯丙烯的方法，主要解决现有催化裂解制乙烯丙烯催化剂的使用温度高，活性低，乙烯丙烯选择性差的问题，本发明通过使用在共生分子筛上负载由元素周期表VIB族元素或VIB族元素和IVB族元素组成的固体超强酸作为催化剂，以组份为C 4 ～C 10 的石脑油为原料，在反应温度为550～700℃，反应压力为0.01～0.5MPa，反应重量空速为0.1～4小时-1 ，水/石脑油重量比为0.5～4∶1的条件下，进行催化裂解反应生成乙烯丙烯的技术方案，较好地解决了该问题，可用于催化裂解制乙烯丙烯的工业生产中。

Within the divergent section of the nozzle extension, the combustion gas continues to expand with increasing velocity (10,000 to 15,000 ft/sec, two to three miles/sec, or three to four times the speed of a high-powered rifle bullet) until it is expelled at the desired nozzle area ratio and gas static pressure to maximize thrust chamber performance.

内部分歧的一段喷嘴延长，燃烧气体的不断扩大，日益增加的速度（ 10000一点五万英尺/秒， 2时58英里/秒，或3至4倍的速度一高功率步枪子弹），直到是驱逐在理想的喷嘴面积比例和天然气的静压力，以最大限度地推力室的表现。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。