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时间加权平均值
...TWA Alarm: 时间加权平均值(TWA)报警点设置STEL Alarm: 短时间暴露限值(STEL)报警点设置关机会导致TWA,STEL和峰值(MAX)复位. STEL和峰值(MAX)以ppm或%方式显示. 清除上述三种...
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特瓦人
...蒲隆地境内有两大主要民族,为数约只有一成半的图奇人(Tutsi)自16世纪以来就一直拥有该国的统治权,控制著主要是由胡图人(Hutu)组成的平民百姓,再加上非常稀少的原住民特瓦人(Twa)....
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时间加权平均
...TUFF Pro型号:提供高级编程功能和下载功能,适用于大多数要求苛刻的职业和工业卫生应用.除提供Plus型号的全部功能外,还具有:时间加权平均(TWA)采样模式,2个 由用户定义的可定时器程序(9组开/关启停时间),以及内置数据记录功能,...
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时间加权平均数
...这些极限可以以8h时间加权平均数(TWA)、最高限制或15min短期暴露极限(STEL)表示. PEL可以变化,用户宜查阅相关国家标准的最新版本作为使用依据. 任何有毒、腐蚀性或窒息性气体在大气中的浓度,达到此浓度会立刻对生命造成威胁,...
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abbr. time-weighted average concentration; 时间加权平均浓度
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abbr. travelling wave amplifier; 行波放大器
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abbr. trans world airlines; 环球航空公司
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abbr. transient working area; 过渡工作区，临时工作区
He acquired the plane in 1939 as part of his purchase of TWA.
他获得的飞机于1939年，这是他购买的临时工。
Travel Agent: I cannot tell you that. I would have to call up TWA.
旅行社代理人：我不知道，我得打个电话给TWA 查一查。
Would you please transfer me to TWA Flight 407?
请你帮我转为TWA407班机好吗？
I cannot tell you that. I would have to call up TWA.
我不知道，我得打个电话给TWA 查一查。
This isn't TWA. There isn't a regular flight schedule.
这不象航空公司有固定的飞行时刻表
Noise, carbon monoxide, sulfuric acid and dust in some operation spots did not met national sanitation requirements. TWA and STEL of carbon monoxide in meltshop both were 16.8~200.0 mg/m^3; that of sulphuric acid beside oxidizing and coloring trough both were 1.05~12.10 mg/m^3; that of dust in surface treatment workshop were 15.75 mg/m^3 and 7.0~77.0 mg/m^3 respectively; noise intensity in sawing rods spot was 110 dB.
部分作业岗位噪声、一氧化碳、硫酸、粉尘监测结果不符合国家卫生标准，如熔炼车间的一氧化碳时间加权平均浓度和短时接触浓度均为16.8~200.0 mg/立方公尺，氧化着色槽旁硫酸TWA和STEL均为1.05~12.10 mg/立方公尺；表面处理车间喷涂处粉尘TWA浓度为15.75 mg/立方公尺，STEL为7.0~77.0 mg/立方公尺，锯棒处噪声强度为110 dB。
Which denoted the sum distances between the origin to even and odd series, was used to present the presence and absence of TWA.
根据奇数序列和偶数序列到原点的距离之和判断T波交替的存在与否。
Methods 25 consecutive TWA cases and 25 inconsecutive TWA were analyzed to see if ventricular arrhythmias happen by ambulatory electrocardiography.
分析25例出现T波电交替DCM患者和25例无T波电交替DCM患者的动态心动图来预测恶性心律失常的发生情况。
They have much in common with the other groups of this region, the Twa and the Hutu.
他们与周围的一些民族之间有许多相似之处，例如胡图族和特佤族。
Permissible Concentration: Product should not be used other than as specified however if used in applications where a mist might be generated, observe a TWA/PEL of 5 mg/m for mineral oil mist OSHA and ACGIH
容许浓度：产品不能在规定范围外使用，但如果在油雾产生情况下运用，应遵循矿物油油雾时量平均浓度/弹性极限为5毫克/米
Occupational Safety and Health Administration will decrease hexavalent chromium PEL-TWA from 0.1 mg/m3 to 0.001mg/m3 in workplace air. And Council Labor Affiar in Taiwan considers to follow this step.
假以美国职业安全卫生署预定在2005年将容许浓度降低一百倍为0.001 mg/m3，我国劳工委员会也考虑降低容许浓度。
TWA agrees to buyout offer by American Airlines American Airlines has agreed to acquire most of Trans World Airlines Inc.
美国航空昨日同意以5亿美元的价码，买下饱受财务状况困扰的环球航空。
The request while monitors PC-TWA, changes the bigger operating location to the density, carries on the monitor appraisal.
要求在监测PC-TWA的同时，对浓度变化较大的工作地点，进行监测评价。
Results The total dust concentration PC-TWA was 0.6~16.6 mg/m3; PC-STEL was 0.6~24.0 mg/m3; silicon dioxide concentration was 1.2%~99.4%; the noise intensity was 58.6~103.7 dB; the total dust concentration(52.9%)and the noise intensity(66.5%)exceeded the national hygienic standard.
结果该市采石场工作岗位生产过程中，总粉尘浓度PC-TWA在0.6~16.6mg/m3之间，PC-STEL在0.6~24.0mg/m3之间；SiO2含量在1.2%~99.4%之间；噪声强度在58.6~103.7dB之间。总粉尘浓度52.9%、噪声强度66.5%超国家卫生标准。
Results The major occupational hazards existed in this new project were welding soot, grinding wheel dust, ferric oxide dust, benzene and benzene series, nickel and compounds, manganese and compounds, noise, X-ray radiation, etc. Tune-weighted average of the iron dust concentration was 13.4 (mg/m^3) which was more than PC-TWA, concentrations of productive dust and poisons did not exceed the PC-TWA, the measuring noise intensity were not exceed 85 dB, NDT room X-ray protection air kerma rates were all lower than 2.5; no suspected occupational patient and occupational contraindication patient were detected by occupational health surveillance.
结果 该新建项目主要职业病危害因素是电焊烟尘、砂轮磨尘、氧化铁尘、苯及苯系物、金属镍及其化合物、锰及其化合物、噪声、X射线辐射等，其中氧化铁尘时间加权平均浓度达13.4，超过PC-TWA，其余生产性粉尘浓度、毒物浓度均未超过PC-TWA，各测点噪声强度均未超过85dB，无损探伤室X射线防护空气比释动能率均低于2.5；职业健康监护未发现疑似职业病及职业禁忌证者。
For example, Indo-European. duwo and Old English tw are etymons of Modern English two.
例如，印欧语中的duwo和古英语中的twa都是现代英语中two的原形词
For example, Indo - European. duwo and Old English tw? re etymons of Modern English two.
例如，印欧语中的duwo和古英语中的twa都是现代英语中two的原形词
Study on determination of the time weighted average concentration for isopropyl alcohol, butyl alcohol and amyl alcohol in workplace air
工作场所空气中醇类化合物异丙醇、丁醇、异戊醇的时间加权平均浓度（TWA）测定方法研究
Research on Detecting the Nonstationary T-wave Alternans (TWA) Based on Correlation Method
基于相关分析方法的非稳态心电T波交替检测研究
Objective To investigate value of T wave alternans (TWA) to complex ventricular arrhythmias.
目的探讨T波电交替对预测复杂性室性心律失常的价值。