查询词典 background radiation

The generic distributions in both modern and fossil times were outlined, and their distribution center, place and time of origin and the way of dispersal were discussed. An attempt was made to discuss early differentiation, geographical radiation and morphological evolution of the family on the background of paleogeography and paleoclimatology, tracing back as far as the Late Cretaceous and Early Tertiary.

作者试图回到遥远的晚白垩纪和旱第三纪，从描绘桦木科植物起源和早期分化的古地理和古气候背景入手，分析了在这种背景下桦木科植物所发生的空间辐射以及植物体本身所产生的形态进化，以求得对桦木科植物起源、散布和分化作出比较合理的解释。

Background and purpose: In recent years, treatment with combined chemotherapy and radiation has become the standard of care for epidermoid carcinoma of the anus.

近几年，化疗合并放射治疗对于肛门的表皮样癌已成为标准的治疗方法。

Our products are used widely on LCD background lighting, EL instrument dial plate for vehicle and motor-bike, gleamy electric toy, gleamy gift and advertising. The product have been using many factories and fields more and more for its outstanding characteristic (thin, elegant, lowest expending, soft pro-plane lighting, transformable, high visibility ,fresh colour and luster, glittery with gradual change, non-exothermic, no ultraviolet radiation sending, longevity, non-maintenance, etc).

产品广泛应用于LCD液晶显示屏背景光（安全生产冷光衣物，LED超薄灯箱），汽车摩托车冷光仪表盘，发光动感玩具，发光礼品，发光广告（超薄、雅致、超低功耗、柔和平面发光、任意形状、能见度高、色泽鲜艳、可闪动和渐变发光、不产生热量和紫外线、寿命长、免维护等）而被越来越多的厂商和领域所采用。

Our products are used widely on LCD background lighting, EL instrument dial plate for vehicle and motor-bike, gleamy electric toy, gleamy gift and advertising. The product have been using many factories and fields more and more for its outstanding characteristic (thin, elegant, lowest expending, softpro-plane lighting, transformable, high visibility ,fresh colour and luster, glittery with gradual change,non-exothermic, no ultraviolet radiation sending, longevity, non-maintenance, etc).

产品广泛应用于LCD液晶显示屏背景光（安全生产冷光衣物，LED超薄灯箱），汽车摩托车冷光仪表盘，发光动感玩具，发光礼品，发光广告（超薄、雅致、超低功耗、柔和平面发光、任意形状、能见度高、色泽鲜艳、可闪动和渐变发光、不产生热量和紫外线、寿命长、免维护等）而被越来越多的厂商和领域所采用。

We can also observe HeII Lyα absorption in the spectra of QSOs thanks to Far-UV satellite FUSE. The column density ratio of HeII to HI can be used to constrain UV radiation background.

借助于FUSE紫外卫星，我们也可以观测单电离HeⅡ所引起的QSOs的吸收，HeⅡ与HI的吸收比率可以用来限制电离背景的谱。

The target and background physical model and infrared radiation are constructed and calculated separatedly based on Vega. Then the attenuate factor of atmosphere between scene and infrared sensor was calculated from atmosphere attenuate model. The infrared imaging system is simulated for generating the final infrared image.

针对低空红外预警的复杂场景，分别建立了目标和背景的辐射模型；考虑大气对红外辐射的衰减作用，建立了大气的传输模型；根据探测器的成像特性建立了成像系统响应模型。

Background and Objectives: Bone metastases are typically treated with bisphosphonates as adjuncts to radiation therapy.

背景和目的：典型治疗骨转移的方法是二膦酸盐＋放疗。

BACKGROUND Young female adult and adolescent cancer patients facing life-preserving but fertility-threatening chemo- or radiation-therapy are increasingly seeking options to protect their reproductive potential.

背景年轻的成年女性和青少年癌症患者在行化疗或放射治疗是面临延长寿命（化疗或放射治疗可以延长寿命）和生育威胁（化疗或放射治疗威胁生育率）的两难境界，越来越多的患者去寻求保护她们的生殖潜力的可能办法。

By establishing a model based on the law of infrared radiation transmission in atmosphere and the characteristics of infrared imaging system for the apparent contrast between the target and the background, and analyzing the model over two wavebands to formulate the distance measuring formula and the distance resolving power formula, a passive distance measurement method is proposed for aerial point target distance measurement.

提出了对空中点目标进行被动测距的方法。基于红外辐射在大气中的传输规律和红外成像系统的特性，建立了目标和背景的表观对比度模型。通过对两个波段上对比度模型的分析，推导出了测距公式和距离分辨率公式。理论分析表明，只要得到大气在两个波段上的消光系数，通过测量目标在两个波段、两个时刻上的目标表观对比度，即可计算得到目标距离和目标径向速度，而距离分辨率则取决于系统的对比度探测能力及相关参数。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。