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Proton events in general only occur in SAA region while electron events appear at both SAA and polar regions.Electron flux of 0 5~2 0?MeV in polar regions is dominant over that of 2~15?MeV,while at SAA,fluxes from the two channels are about the same.There is a close correlation between energetic particle radiation inside and outside the satellite.
与现有理论模型和国外大致相同轨道上的空间高能辐射环境直接观测资料对比还表明,卫星舱内的辐射与舱外的空间辐射环境是完全相关的,积累的有关资料不但是航天设计和环境应用研究所需的重要参量之一,也是空间物理基础研究特别是辐射带研究的重要数据。
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The result shows that average background radiation can not be deduced by using mean value theorem in visible light band.
通过计算可以表明,在可见波段,平均辐射不能用中值定理来推导,因而不能用天顶角为45度或135度的天地背景辐射来代替平均背景辐射。
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The author discussed the effect of opacity on stellar evolution and concentrated on the mechanism of triggering blue loop by using Padova stellar model. It shows that extended mixing at the bottom of the convective envelope changed the interior hydrogen profile, which triggers or suppresses blue loop. Laboratory astrophysics, which is a cross subject of astrophysics and plasma physics, combines the demand of accurate data of radiative opacity with the latest advances in high intense lasers to devise the third independent method to study the radiative opacity. On the basis of the comparison between stellar material and laser-produced plasma in terrestrial laboratory, the desirable way to study opacity in laboratory and the brief introduction to the experiments relative to opacity are given.
本论文就开展辐射不透明度实验室研究的背景、内容和意义进行了介绍,并在对实验室的激光等离子体和天体环境下的恒星物质两者差异和相关性的认识基础上,论证了开展辐射不透明度实验室研究的可行性,而且对世界上正在开展的类似研究予以简要介绍,期望可以将天体物理领域对辐射不透明度数据可靠程度的质疑以及对其准确数值的广泛要求,与激光等离子体物理实验的最新进展相结合,推进辐射不透明度实验室研究,为辐射不透明度的研究开拓了继天文观测和理论计算的第三种独立的手段。
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The surface southeast wind is a condition for the generation of advection fog, but it contributes to the disappearance of radiation fog. The inversion in the radiation fog is thick and strong ,but it is weaker or no inversion in the advection fog. The evolution of stratification from the occurrence to the destruction in the radiation fog is from stable to unstable, while the advection fog from unstable to stable.
底层东南风是平流雾生成的条件,却对应于辐射雾的消亡;辐射雾逆温厚而强,平流雾则为弱的逆温或无逆温;辐射雾生消演变对应于大气层结由稳定发展为不稳定,平流雾则对应于由不稳定趋于稳定。
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By comparison between SMM HXRBS observation and ground observation of Hα and CaIIK lines, especially through the combined study between SMM HXRBS observation and chromospheric flare models, the results show that: in the initial stage of impulsive phase, there is a correlative relation betweem Hα line intensity and hard X-ray emission; different spike in hard X-ray flux curve represents the burst at different location; the energy taken by non-thermal electron beam is larger than the radiative loss in chromosphere; for the flare studied here, the chromospheric evapporation is explosive; if the chromosphere is in balance between electron beam bombardment and radiative loss, the column mass density at the top of chromospheric flare model can not be taken as measure from the source of electrons and then the total material between the source of electrons and the top of chromosphere can be estimated.
通过一个具体耀斑的SMM HXRBS观测结果与同时基于地面得到的Hα和CaⅡK可见光谱观测结果对比,特别是将硬x谱观测结果与色球半经验模型联立研究,结果显示出:在脉冲相上升段,硬x发射与Hα辐射之间存在对应关系;硬x线光变曲线中不同脉冲爆发分量不太可能起源于同一位置;硬x辐射所反映的高能非热电子总携带能量大于色球总辐射损失;对所研究的耀斑而言,其色球蒸发过程是爆发性的;在详细比较了非热电子色球总沉积和色球辐射损失的基础上,指出半经验模型中色球顶部柱数密度不能看成是从非热电子源度量的,从而估计了色球顶部到非热电子源之间的总物质。
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The results showed that(1) UV-B irradiation can inhibit the growth and photosynthetic rate of Nitzschia closterium,and the inhibiting effects were more significant when the time was prolonged;(2) UV-B irradiation decreased soluble sugar.In the initial 2 days,soluble sugar of N.closterium decreased rapidly,the soluble sugar on the 4~ day has...
结果表明:(1)随着UV-B暴露时间的延长,UV-B辐射对藻的生长以及光合速率有抑制作用,并且时间越长,抑制作用越明显;(2)UV-B辐射使小新月菱形藻可溶性糖含量降低,而且在最初的2d,UV-B辐射使可溶性糖含量降低迅速,第4天的可溶性糖含量稍有所升高但与第2天相比差异不显著,UV-B辐射第6天,可溶性糖含量又迅速降低;(3)UV-B辐射的可溶性蛋白含量在第2天明显升高,随后又快速下降;(4)对照组的还原型谷胱甘肽含量的变化随时间延长而升高,UV-B辐射第2天的GSH含量比初始状态(0d)的GSH含量稍有升高,但变化不明显,第2天之后,GSH含量随时间延长而快速降低;(5)对照组的过氧化物酶活性随时间延长而升高,UV-B辐射第2天的POD活性比初始状态(0d)的POD活性显著升高,第2天之后,POD活性随时间延长而快速降低。
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The reaction has been drawing increased attention in that the reaction permit the use of organoboron compounds that are thermally stable and inert to water and oxygen.In this section microwave promoted Suzuki reaction of Sodium tetraphenylborate (NaBPh4) with carboxylic anhydrides catalyzed by Pd(PPh3)2Cl2 in THF was first reported.
第二章:微波辐射下Pd配合物催化NaBPh_4与羧酸酐的偶联反应研究本章中我们在微波辐射条件下,研究了PdCl_2(PPh_3)_2催化NaBPh_4与羧酸酐偶联反应,合成出了十种不对称芳酮,并分别考察了微波辐射功率、辐射时间、溶剂和原料配比等因素对反应的影响,优选出了较佳的反应条件,并根据文献及实验结果,讨论了可能的反应机理。
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According to the energy conservation theory, BOM and CSIM4 were coupled. The BOM has no treatment on transmission solar radiation, which is of great importance when the model is adapted to Arctic Ocean. So the treatment was introduced to BOM. Through numerical test on different lead albedos, it was found that sea ice thickness is not so sensitive to lead albedo, which may be contribute to the lead occupies little ratio within multiyear sea ice pack. The reason of summer over-melt of arctic sea ice is the NCEP reanalysis downward solar radiation being larger than its reality. Then the arctic sea ice climate variability was simulated. Results showed that: simulated ice thickness change is in accord with the submarine investigated mean sea-ice draft changes. Simulated annually maximum ice thickness along the Eurasian continental oceans are closely related to the observed ones. The long-term mean simulated ice motion has the same features of the SSM/I derived ice motion. Sea ice extents in differential sub-regions have same trends comparing to the satellite passive-microwave data derived ones. Simulated ice concentration is closely related to the observed in the Arctic sub-regions. Sea ice flux through the Fram Strait involves ice concentration, motion and thickness. It is a composite criterion for sea ice model evaluation. The simulated ice area and volume export through the strait accord with the satellite derived or statistically reconstructed ones.(5) The simulated ice thickness climate variability and mean sea surface current of the coupled model were analyzed, results showed: the total ice volume in the Arctic Ocean has a significant decreasing trend. The volume variability is of a 10-year timescale oscillation, with two major periods of 12-13a and 18-20a. Mean ice thickness in the arctic sub-seas has different tendencies. It has an increasing trend in the Barents-Kara Sea and Baffin Bay-Labrador Sea, and decreasing in the others. The characteristic time scale of 7-10a wherein the river discharges leads the Fram Strait ice volume export is about the period that river water takes to be conveyed across the Arctic Ocean.(6) Using the simulated ice distribution in the Arctic Ocean and China precipitation, air temperature and SST in tropical key regions, the climate teleconnection were studied. Result showed: When the mean sea ice thickness is large in the central Arctic Ocean and Chukchi-Beaufort Sea , and small in the Barents-Kara Sea and Baffin Bay-Labrador Sea , the precipitation in South China, Tibetan Plateau, and the north part of Northeastern China are always smaller than normal, and v. v. When the mean ice thickness is small in CA, BC, East Siberian Sea and Greenland-Iceland-Norwegian Sea , and large in BL, The air temperature in north-eastern China, the southern of Tibetan Plateau, and Hainan Island, are always lower than normal, and v. v. In addition, when the sea ice is thick in BC and BL, the SST is larger in the middle and eastern Pacific Ocean, and is smaller in the tropical Southeastern Indian Ocean.
由于BOM没有考虑透射太阳辐射的物理过程,研究表明透射太阳辐射对北冰洋的能量收支起到重要作用,因此在BOM模式中引入了对透射太阳辐射的处理;通过对不同水道反照率的数值试验表明海冰厚度对水道反照率的敏感性不强,可能与海冰区水道面积占的比率很小有关;而模式模拟的北极海冰夏季&过度融化&主要源于NCEP再分析资料提供了偏大的太阳短波辐射;对北极海冰的气候变率进行了模拟研究,结果表明:模拟的海冰厚度变化与潜艇探测的海冰吃深度变化具有一致性;模拟和观测的亚欧大陆沿海的年内最大海冰厚度有很好的相关;模拟的海冰移速与长期平均的卫星反演的海冰移速具有相同的速度分布特征;模拟的各个海区海冰面积的变化趋势与卫星反演资料分析的结果基本一致;模拟与观测的主要海洋分区的海冰密集度具有很好的相关:弗瑞姆海峡的海冰体积和面积的输送涉及到海冰密集度、厚度和移动速度,是判断模式模拟能力的一个综合的指标,模式模拟的结果与卫星反演或重建的面积输送、体积输送具有很好的一致性;(5)分析了模拟的北极海冰厚度的气候变率及气候平均表层海流场,结果表明:北极海冰的总体积有显著减少的趋势,北极海冰总体积的变化具有10a际尺度振荡的特点,存在18-20a和12-13a两个主周期;北极海冰的平均厚度在各个海区的变化趋势不同,在巴伦支—喀拉海和巴芬湾—拉布拉多海地区海冰厚度有显著的增加趋势,而其它海区存在减少的趋势;通过对模拟的气候平均表层海流的分析表明,北极河流流量超前弗瑞姆海峡海冰流量7-10年的特征时间尺度与表层海流的气候分布存在着必然联系:(6)利用模拟结果以及中国降水、气温和热带关键区SST资料,讨论了北极各海区海冰平均厚度与中国降水、气温以及热带关键区SST的关系,结果表明:在北极中心海区和楚科奇—波弗特海海冰厚度偏大,在巴伦支—喀拉海以及巴芬湾—拉布拉多海海冰厚度偏小,则中国降水在华南地区、青藏高原和东北北部降水偏少,反之相反;在北极中心海区、东西伯利亚海、楚科奇—波弗特海以及格陵兰海海冰厚度偏小,在巴芬湾—拉布拉多海海冰厚度偏大,则在中国东北地区、高原南部地区和海南岛附近气温偏低,反之相反;另外,北极楚科奇—波弗特海和巴芬湾—拉布拉多海海冰厚度偏大时,在热带中东太平洋海温偏高,而在热带东南印度洋海温偏低。
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Firstly, we research the Vlasov antenna with reflector mainly. A new method to calculate the radiation of the antenna is founded with Vectorial Theory of Diffraction, and the corresponding program is made. The reflective characters of Vlasov antenna are studied with Moment Methods, and the results show that the total reflected energy is less than 0.25%. The radiation patterns of the antenna are analyzed, and the formulas to estimate the wave beam parameters and to design the antenna are provided. The feasibility of radiating high-order modes by Vlasov antenna is also discussed and verified. The hermetization of the Vlasov antenna is researched and the results show that with such kinds of hermetization the antenna can work under gigawatt level. The design of the mode converter from TEM to TMoi is studied, which is useful when the TEM coaxial mode is radiated by Vlasov antenna. At last, the flared-end Vlasov antenna is also discussed.
在Vlasov天线方面:用矢量绕射理论建立了天线辐射场的计算模型并编写了计算程序,该程序计算结果在主瓣上与实验测量吻合良好,近旁瓣也基本一致;利用矩量法计算了天线的反射系数,表明该天线有较小的反射,总的能量反射小于0.25%;详细分析了天线的辐射特性,给出了天线辐射波束相关参数的估算公式和天线设计公式;进一步研究和论证了Vlasov天线辐射高阶轴对称模的可行性;对天线的密封方式和功率容量进行了讨论,结果表明在不需很大密封罩的情况下可以获得GW级的功率容量;为了用Vlasov天线辐射同轴TEM模,研究了TEM-TM_(01)模式转换器的设计,得到了一些基本规律;最后,介绍和分析了带有锥形喇叭的Vlasov天线。
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The main contents of the present paper include: 1、The mechanism of fouling accumulation and the effects of fouling and slagging on boiler performance are analyzed. The model of fouling increasing is developed on the basis of sediment rate and denudation rate. The fouling monitoring models for boiler furnace and convective sections based on heat balance, the ones for air heater based on converted pressure difference are given. The implement results show that these models can reveal the cleanliness of boiler heat transfer surface. 2、The disadvantages of the model for boiler furnace fouling and slagging monitoring based on heat balance are discussed, and the calculation of radiant heat flux is considered as the primary difficulty.
主要包括以下内容: 1、分析了锅炉受热面污染形成的机理,从灰污的沉积率和剥蚀率角度出发,推导了受热面灰污增长的基本模型,分析了灰污热阻随积灰时间和烟气流速变化的规律,并通过大量现场试验,得到了沉积常数与时间常数的取值范围; 2、针对炉膛、对流受热面和空气预热器等不同受热面的传热特性,分别建立了基于热平衡和折算压差的污染在线监测模型,经实践验证,其监测结果能够满足现场工程应用的精度要求; 3、分析了基于热平衡原理的辐射、半辐射污染监测模型的不足之处,指出了机理模型因对炉内辐射换热量计算不准确,导致对以辐射换热为主的炉膛和以半辐射半对流的屏式过热器监测效果不够理想。
- 更多网络解释与不辐射相关的网络解释 [注:此内容来源于网络,仅供参考]
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radiation injury:辐射线损伤
radiation induced trapping 辐射感应捕获 | radiation injury 辐射线损伤 | radiation insensitivity 辐射不灵敏性
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radiation insensitivity:辐射不灵敏性
radiation injury 辐射线损伤 | radiation insensitivity 辐射不灵敏性 | radiation ionization 辐射电离
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Radiance:辐射率
辐射率(radiance) 辐射率是与表面的视觉亮度紧密对应的物理量. 对于光辐射(包括不可见的红外和紫外辐射光)人射束,测量其(平均)辐射率的简单辐射计是由一个圆柱管构成的,管的每个端盖上有一个孔,以确定该处束的截面,
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radiation hazard:辐射危害
该厚度对某一特定质量的辐射均同等地不透明;"认可检验所"(approved laboratory) 指为施行第16条而由管理局认可的检验所;"辐射"(radiation) 及"射线"(rays) 指电离辐射;"辐射危害"(radiation hazard) 指受电离辐射照射而引起的健康上的危险,
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thermal radiation:热辐射
从物理本质上讲,热辐射(thermal radiation)和其他所有各种辐射一样,都是电磁波. 它们之间的内在区别是导致发射电磁波的激励方式不同,而外在表现是发射的波长不一样,以及吸收该电磁波之后所引起的效应不同. 热辐射的特点与导热及对流有着显著的不同之处.
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athermanous:不透辐射热的
athermancy 不透辐射热性 | athermanous 不透辐射热的 | atm 自动测试装置
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athermic:不透辐射热的;不导热的
athermanous 不透热的 | athermic 不透辐射热的;不导热的 | athodyd 冲压喷气发动机
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nonionizing radiation:非电离辐射
5.非电离辐射(nonionizing radiation)非电离辐射包括射频辐射、微波、红外线、可见光及紫外线. 其特点与电离辐射相反,波长长、频率低、辐射能量低、不具有电离作用. 1.急性毒作用(acute toxicity) 指机体一次大剂量接触或在24小时内多次接触一种环境化学物质所引起的快速而剧烈的急性中毒效应.
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radiopacity:辐射不透萌
辐射微生物学 radiomicrobiology | 辐射不透萌 radiopacity | 放射病理生理学 radiopathophysiology
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radiation-induced disordering:辐射诱发不规律现象
"辐射高温计","radiation pyrometer" | "辐射诱发不规律现象","radiation-induced disordering" | "辐射热传递","radient heat transfer"