几乎连续的
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The composi-tion of the seawater has changed rapidly since Phanerozoic, and the prolonged mineralogical changes of marine non-skeletal limestone and potash evaporates occurred in a phase on a 100-200 Ma.
结果表明:显生宙以来海水组分发生变化,经海相非骨骼灰岩和钾盐蒸发岩矿物学研究,发现这两种沉积岩长期以来连续变化,在"文石海"是MgSO4型蒸发盐,在"方解石海"是KCl型蒸发盐,从白垩纪晚期、第三纪早期的底部石盐溴含量及矿物学特征表明,此时处于"方解石海",古海水组分的特点是造成缺硫酸盐型钾盐矿床形成的物化基础;通过NaCl-KCl-MgCl2-H2O和NaCl-KCl-MgCl2-CaCl2-H2O两个体系相图的分析认为,当时所形成的成钾原始体系母液是高镁、低钾氯化物型的卤水,在母液蒸发过程中,由于原始海侵母液与残余高镁母液的掺杂作用,致使结晶路线直接从氯化钠区到E点母液或光卤石与氯化钠共饱线上,而没有通过氯化钠和氯化钾的共饱线,因而在矿体中氯化钾相很少或几乎不存在,由于外界CaCl2型水体的掺杂,使成钾母液进入光卤石相区,随着蒸发的进行,最终形成溢晶石矿物。
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In this dissertation, InGaAs/InGaAsP/InP MQW microdisk laser and its characterization were presented. Some conclusions are as following: the characteristics of lasing threshold was discussed by using rate equation. The dependent relations between threshold and cavity volume, spontaneous emission coupling efficiency β were investigated. The whispering gallery mode and spontaneous emission in a microdisk geometry were then studied. Almost all spontaneous emission was coupled into the lowest order TE mode when the normalized thickness of photonics well was between 0.15 and 0.5. The design principle and device process of InGaAs/InGaAsP/InP MQW microdisk laser were presented. The microdisk lasers with the diameter of 8μm, 4. 5μm and 2μm were succesfully fabricated by using etching techniques. The pulse lasing thresholds for the microdisk with the diameter of 8μm and 4. 5μm were 170μW and 15μW, a record results compared with the published in the literature. The cw lasing threshold for a 2-μm-diameter microdisk was only a few μW. We haven't found similar report up to now. To solve the problem of directional output in a microdisk laser, the power coupling efficiency in a double disk geometry was investigated with the theory of waveguide mode couple. A new structure of electrically pumped microdisk laser with output waveguide was designed, making a foundation for the practical use of microdisk laser.
本文主要研究InGaAs/InGaAsP/InP多量子阱半导体碟型激光器的研制和特性表征,并取得如下结果:利用速率方程理论讨论了激光器激射阈值的特性,分析了阈值与腔体积和自发发射耦合系数β之间的关系;讨论了微碟光子阱结构中的自发发射特性和微碟中WGM模式特性;光子阱结构在其归一化厚度在0.15-0.5之间时,几乎全部自发发射进入到最低阶TE模式中;研究了InGaAs/InGaAsP/InP多量子阱微碟激光器的结构设计原理和器件的制备工艺;利用刻蚀方法成功制备出直径分别为8μm、4.5μm、2μm的碟型微腔激光器;直径8μm和4.5μm的微碟脉冲光泵浦激射阈值分别为170μW、15μW,是目前所见文献报导中比较低的;直径2μm的微碟连续光泵浦激射阈值仅几μW,目前尚未见到达到类似结果的研究报导;为解决微碟激光器激射光定向引出的问题,通过波导耦合模理论分析了双层碟之间功率耦合效率;据此设计了新型带耦合输出波导的电泵浦微腔激光器,为进一步研制可实用的电泵浦微腔激光器打下基础。
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The images you are looking at in the video are "space weather beacon mode" images that are tele me tered down nearly continuously: in near-realti me , and are both binned (undersampled spatially, down to 512 x 512 pixels) and heavily, lossily compressed d ig itally onboard (analogous to the various JPEG compression settings on a d ig ital ca me ra, but much more severe).
你们在视频里面看见的是&太空气候信标式&的影像,它们被连续地用遥测发射器传送着:几乎是以实时的方式进行的,并都被频密地放入了储存器中。(空间上取样不足,缩减为512 x 512像素),数字压缩时造成了损耗,(与在数字相机上进行的各种JPEG格式的压缩情况类似,但更加严重)。
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But ive got to admit when he came out of kentucky i watched him quite a bit when he was there.i didnt know he would turn out to be the pro as he is.but despite his quiet appearing demeaner there is toughness to him.defensively he is versatile he can block shots,he can stay in front of you and is willing to play defense.offensively he has got a lot more in his package that he gets credit for.hes got the nice mid range game hes got a couple of nice moves in the low box with the running hook and jump hook.and he is very efficient and he is reliable.this guy does not miss games as a matter of fact in one point he has the longest consecutive games play streak in the nba.extreamly durable and productive.
但我必须承认当他刚刚从肯塔基州出来时我看过不少他的比赛。我可没料到他能在日后成为如此专业的球员。别看他平时安静低调,他的骨子里却隐藏着坚韧性。防守方面他是全能专家,可以盖帽,紧盯着你,并且乐意专注防守。进攻上他的攻击能力也被人称道,他有中距离篮,也能在低位用跑动勾手得分,效率显著且相当可靠,实际上他几乎没缺席过什么比赛,他有着nba历史上第二长的连续出场纪录,极度不易受伤,高效
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Complex surface structures stripes or bandings were found in those of A. dichotoma, but less in P. inclinatus. The trabeculae consisted of three parts the surface part, the cylindrical layer and the central part. The surface and the central part were mainly protein substances which could be dissolved by KOH.
其中心部主要是溶解于KOH溶液的物质蛋白一类的物质,环状纤维层中的几丁质纤维,在层和层之间相互不同的方向排列着,并各自与前翅的上下层中的几丁质纤维连续地连接着2独角仙前翅小柱的表面有复杂的纹样,而锹形虫的小柱表面只有非常简单的几乎没有纹样。
- 推荐网络例句
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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。
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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。
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You rap, you know we are not so good at rapping, huh?
你唱吧,你也知道我们并不那么擅长说唱,对吧?