查询词典 air pressure

The calculation and experiment results show that the maximum lifting pressure performance decreases with the increase in throat diameter of channel of variable section, water flux of low pressure and pressure ratio of steam nozzle, and has its minimum value with water nozzle annular space. The coefficient of maximum lifting pressure performance may be as high as 26. In the design of steam injector, the larger pressure ratio of steam nozzle and the smaller water nozzle annular space are selected, the higher lifting pressure performance could be obtained.

计算及研究表明：极限升压能力随变截面混合腔喉部直径、被升压的低压水流量和蒸汽喷嘴压比增加而降低，随环形水喷嘴间隙的变化出现了最小值；计算得出变截面超音速汽液两相流装置的极限升压能力可达26；在设计升压装置时应尽可能选取较大的蒸汽喷嘴压比和较小的环形水喷嘴间隙。

It works as shown in Figure 2b, when the work when the system is high pressure, EF mouth also in high pressure, high pressure Balance Valves unloading of oil equivalent one-way valve open and the unloading valve 3 1 contact; when the pressure exceeds the safety valve unloading having a set pressure, unloading relief valve to open, the return oil through oil path b to uninstall the spool 4, left, unloading Safety valves valve spring to overcome the spring force 5, unloading spool shifted to the right, EF population of high-pressure oil through direct discharge port T Dutch tank.

其工作原理如图2b所示，当工作系统处于高压状态时，EF口也处于高压状态，高压油打开等值卸荷单向阀3与卸荷安全阀1接触；当压力超过卸荷安全阀调定压力时，卸荷安全阀开启，其回油经油道b到卸载阀芯4左端，克服卸载阀弹簧5的弹簧力，卸载阀芯右移，EF口的高压油经T口直接卸荷油箱。

At the instrumentation products, are the United States Dwyer, Antunes Controls, AutoTran, Lighthouse, Sweden SenseAir, Switzerland BELIMO, Germany Beck's authorized dealers, etc., these products include pressure switch / pressure switch, pressure change delivery, and pressure gauge / pressure table, temperature / humidity / dewpoint sensors, liquid level, flow meters, flow switches and transmitters, carbon dioxide, carbon monoxide sensors, airborne particle counter and so on, are widely used in HVAC , air-conditioning, chip manufacturing, semiconductor, food, pharmaceutical, bio-engineering, intelligent buildings, power plants, chemical industry, water treatment, environmental monitoring, industrial manufacturing and other fields, while the company is gradually taking shape self-developed product line.

在仪器仪表产品方面，是美国Dwyer、 Antunes Controls、AutoTran、Lighthouse、瑞典SenseAir、瑞士BELIMO、德国Beck等公司的授权代理商，这些产品包括压力开关/压差开关、差压变送器、压力表/压差表、温度/湿度/露点传感器、液位、流量计、流量开关及变送器、二氧化碳、一氧化碳传感器，尘埃粒子计数器等，广泛用于暖通、空调、芯片制造、半导体、食品、制药、生物工程、智能楼宇、电厂、化工、水处理、环境监测、工业制造等领域，同时公司正在逐步形成自主开发的产品线。

Rna - Rns, see "Partitioning of net radiation", for multiple plants the fraction of radiation to each plant is calculated in the radiation section, see "Partitioning of radiation between plants", es is the vapour pressure at saturation, ea is the actual vapour pressure,ρa is air density, cp is the specific heat of air at constant pressure, Lν is the latent heat of vaporisation,Δ is the slope of saturated vapour pressure versus temperature curve,γ is the psychrometer "constant", rs is an "effective" surface resistance and ra is the aerodynamic resistance.

潜在蒸腾量 Etp 根据Monteith(1965)给出的彭曼联合方程形式计算：式中： Rn 为对于蒸腾的有效净辐射量(也就是 Rna - Rns ，见"净辐射划分"-Partitioning of net radiation，对于多重植被，每一株植物的辐射比率的计算见辐射一节的"植物间的辐射划分"Partitioning of radiation between plants)； es 为饱和水气压；ea 为实际水气压；ρa 为空气密度； cp 为常压下的空气比热；Lν为汽化潜热；Δ为与温度曲线饱和水气压关系曲线斜率；γ为干湿球湿度计"常数"；rs 为"有效"表面阻力；ra 为气动阻力。

All the analysis was done using SAS EM 4.1 software. The prevalence of tracheobronchitis were higher in spring and autumn. Average atmospheric pressure, average temperature, highest air temperature, lowest air temperature, water-vapour pressure, degradation of visibility were positively correlated with the prevalence of tracheobronchitis. Factors that affected the incidence of tracheobronchitis were average atmospheric pressure, degradation of visibility, daily temperature difference and water-vapour pressure.

结果］湖州市气管支气管炎门诊人数存在明显的季节分布差异，夏季和冬季是此类疾病的2个高发季节，而春季和秋季门诊人数较少；其门诊人数与平均气压、平均气温、最高气温、最低气温、水汽压、大气能见度等气象条件存在较好相关性；影响气管支气管炎门诊人数的主要气象因子有平均气压、能见度、日较差和水汽压，当平均气压≥1020.33hPa且能见度＜6.2km时，气管支气管炎门诊人数最高。

Rna - Rns, see "Partitioning of net radiation", for multiple plants the fraction of radiation to each plant is calculated in the radiation section, see "Partitioning of radiation between plants", es is the vapour pressure at saturation, ea is the actual vapour pressure,ρa is air density, cp is the specific heat of air at constant pressure, Lν is the latent heat of vaporisation,Δ is the slope of saturated vapour pressure versus temperature curve,γ is the psychrometer "constant", rs is an "effective" surface resistance and ra is the aerodynamic resistance.

潜在蒸腾量 Etp 根据Monteith(1965)给出的彭曼联合方程形式计算：式中： Rn 为对于蒸腾的有效净辐射量(也就是 Rna - Rns ，见&净辐射划分&-Partitioning of net radiation，对于多重植被，每一株植物的辐射比率的计算见辐射一节的&植物间的辐射划分&Partitioning of radiation between plants)； es 为饱和水气压；ea 为实际水气压；ρa 为空气密度； cp 为常压下的空气比热；Lν为汽化潜热；Δ为与温度曲线饱和水气压关系曲线斜率；γ为干湿球湿度计&常数&；rs 为&有效&表面阻力；ra 为气动阻力。

Be able to explode ignites （3000Till 4000 ℃,This also is living over-dose air and the numeric value when possesing remains waste gas only ,In case according to the ideal air/fuel ratio layout ,There is not waste gas ,The temperature gathering is taller ）Oil30 grams may be cause （90℃ tail gas preheats ）Steamization （Vaporization heat 2282.7J\g ）……At the respect of the pressure swelling ,Even if being in the critical of water （374℃）Condition ,Critical pressure 21.83MPa of water 、Carbon dioxide critical（31.1℃）Pressure 7.38MPa also is some -fold of a rule piston style explosive motor pressure 5--9MPa （Dalton's Law or the Law of Additive pressures）……For emploing the capacity means difference ,Therefore the composition is different as black and white .

一克爆燃（3000至4000摄氏度，这也只是在过量空气和有残余废气时的数值，如果按理想空燃比配置，没有废气，温度会更高）的油可以使30克（90摄氏度尾气预热）的水汽化（汽化热2282.7J\g）……从膨胀压力方面来说，即使处于水的临界（374摄氏度）状态，水的临界压力21.83MPa、二氧化碳的临界（31.1摄氏度）压力7。 38MPa也是常规活塞式内燃机压力5--9MPa的几倍（压力叠加定律，道尔顿定律）……因为用能方式不同，所以结构就截然不同。

Strong technical force, well equipped, set more than 10 years of professional experience in machinery manufacturing, to set up factories in the country completely on its own production and marketing of machinery manufacturing plant, and the introduction of Japan, Taiwan and other advanced equipment, technologies and the development of manufacturing components A variety of mechanical equipment, there are two main products, hydraulic pressure of 4-, C-type hydraulic pressure, pneumatic pressure bed, air-pressure supercharger oil, gas, hydraulic-rivet machines, membrane switch drum kits pressing machine, dual - Die-pressing machines, pneumatic peeling machine, precision Dijiao machine, precision high-speed presses, open-tilting presses, automatic drilling tapping machines, pneumatic Arm tapping machines, automatic air Tape feeder, vibration Tape feeder, Hydraulic power portfolio, widely applicable in the electronics, electrical appliances, computers, metal, plastics, lighting, bicycles, steam locomotive, machinery and other industries, welcomed by the majority of users, machine-selling Taiwan, Southeast Asia and China's provinces.

公司技术力量雄厚，设备齐全精良，集十余年的专业机械制造经验，设厂于国内完全的自行产销的机械制造工厂，并引进了日本、台湾等先进设备、技术及元件开发制造多种机械设备，主要产品有二、四柱油压压床，C型油压压床，气压压床，空油增压压床，气油压式铆钉机，薄膜开关鼓包热压机，双面模热压机，气压剥皮机，精密滴胶机，精密高速冲床，开式可倾压力机，自动钻孔攻牙机，气动旋臂攻牙机，空气自动送料机，振动送料机，油压动力组合等，广泛适用于电子、电器、电脑、五金、塑胶、灯饰、自行车、汽机车、机械等各种行业，深受广大用户欢迎，机械广销台湾，东南亚及中国各省。

R12 on the ozone layer due to the destruction of the requirements of the developed countries for environmental protection from 1996 to start using refrigerant R134a Automotive Air-conditioning and the construction of air-conditioning at home in a similar, it is often installed in the compressor engine, and with a belt drive, the condenser installed in the car in front of the radiator, and evaporator in the car inside, and work out from the evaporator of low pressure gaseous refrigerant flows through a high-pressure high-temperature gas compressor After cooling condenser cooling tube cooling into the low-temperature high-pressure liquid, through the desiccant dryers and storage of buffer, and then to a more stable flow of pressure and flow expansion valve, the final expenditure and the flow of relief evaporator.

由于R12对大气臭氧层的破坏，出于环保的要求发达国家从1996年开始改用R134a做制冷剂汽车空调的构造和家用的分体空调类似，它的压缩机往往是安装在发动机上，并用皮带驱动，冷凝器安装在汽车散热器的前方，而蒸发器在车里面，工作时从蒸发器出来的低压气态致冷剂流经压缩机变成高压高温气体，经过冷凝器散热管降温冷却变成高压低温的液体，再经过贮液干燥器除湿与缓冲，然后以较稳定的压力和流量流向膨胀阀，经节流和降压最后流向蒸发器。

So in this paper based on the characteristics and the optimum state theory of the vehicle, some kinds of control schemes are compared and discussed, and the fuzzy PID control scheme is adopted at last. The relation between air-cushion pressure and fan rotational speed on the optimum driving state is studied. The cushion pressure is used as controlled variable and the fan revolution is used as regulated variable. And transducer and fan motor are actuators.Based on the structure and operating properties of half-tracked air-cushion vehicle, the control system scheme and structure are presented. A control scheme using the self-tuning PID fuzzy logical controller is adopted. Fuzzy rules are set up and some researches have been done for fuzzy tuning method. At the same time the real-time measurement scheme by computer control is proposed, and electric circuits are designed. In the control system of half-tracked air-cushion vehicle cushion pressure P〓 is used as controlled variable and the fan speed n〓 as regulated variable.

因此本文以半履带式气垫车的特性和最佳工作状态理论为指导，通过对各种控制方法的比较与探讨，提出采用模糊PID控制方案，并且研究了在最佳工作状态下垫压及风机转速的关系，提出气垫压力作为控制参数，变频器和风机电机为执行机构，风机转速为调节量；主要进行了自整定模糊PID控制器的设计，研究了自整定PID模糊控制器的实现方法，编制了模糊控制规则，制定了模糊控制参数查询表，并分析了影响自整定模糊控制器相关的影响因素，确定了模糊控制表；为了实现半履带式气垫车的自动控制，还提出了计算机模糊控制系统的原理与结构，设计了相应的测量电路与控制软件。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。