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2Nd, thorough analysis: The Earth may say is an extremely marvelous thermonuclear reactor, when the earth interior pressure achieved certain critical, in the Earth material may decay the nuclear matter is called as the thermonuclear material, can have the thermonuclear reaction, thus has the huge energy, then the melted partial materials, form the rock magma are the liquid state materials, this response stratification plane is possibly many stratification planes, first possibly is located between the earth's crust and the mantle, upward next two transfers, displays for the light density material diastrophism as well as density upper mantle material phenomena and so on solidification; Under second possibly is located between the mantle and the core, the pressure is more formidable, causes not not easily to have the thermonuclear reaction thermonuclear material to have the response, forms the relative quite stable liquefied material level, simultaneously is upward next two transfers, forms the counter-flow phenomenon which the high density under mantle as well as the high density core material contact liquefies and is far away cools; These material periodicity regular movements and so on convection as well as Earth polar axis rotation are possibly the basic source powers which the terrestrial magnetic field produces.
深入剖析:地球可以说是一个非常奇妙的热核反应堆,当地球内部的压力达到一定的临界,地球物质中可衰变的核物质统称为热核物质,就会发生热核反应,从而产生巨大的能量,进而融化部分物质,形成岩浆即液态物质,这个反应层面可能是多个层面,第一层可能位于地壳与地幔之间,向上下两边对流,表现为轻密度物质的地壳运动以及中密度上地幔物质的固化等现象;第二层可能位于下地幔与地核之间,压力更为强大,引起不易发生热核反应的热核物质发生反应,形成相对比较稳定的液化物质层,同时向上下两边对流,形成中高密度的下地幔以及高密度地核物质的接触液化和远离冷却的对流现象;这些对流以及地球极轴自转等物质周期性规律性运动可能是地球磁场产生的根本源动力。
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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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Besides the traditional functions and features you can image, Turbo Photo provides its own unique and magic functions like tone maker, smart erase, noise reduction, defog, HSB curve and many more...
Turbo Photo的设计使用了一流的独创的图像处理技术,使得这些应用的最终效果不逊于任何单项软件,甚至有所超出,譬如她是世界上第一个把皮肤自动识别与美化结合在一起的全自动处理软件,可以在1分钟内达到数字美容的效果;综合去噪技术可以有效去除感光噪声和色彩斑点;同样,首创的,面向问题的'照片门诊部'可以轻松的解决照片里的多种不足和瑕疵,自动/半自动的将您的照片调整到最佳的曝光与色彩;独具创意的HSB曲线调整、色调大师等功能从新的角度为您的创作提供可能;大量可扩展的边框、配色方案、特效插件等(注1)帮助喜欢玩的您创建个人风格的作品。。。
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The results show:(1) that the dynamical properties in the system depend on the degree of entanglement of the initial two identical two-level entangled atoms and the intensity of the coherent optical field, and the atomic dipole moment can be completely squeezed via choosing optimal degree of entanglement of the initial atoms in the feeblish optical field;(2) that the quantum properties of the system also depend on the degree of entanglement of the initial two identical two-level entangled atoms and the intensity of the coherent optical field, and the radiation field can be effectively squeezed via choosing optimal degree of entanglement of the initial atoms in the feeblish optical field.
结果表明:(1)相干态光场的强度和两原子的初始纠缠度对原子的动力学行为有很大的影响。原子布居的振荡频率及幅度和原子偶极压缩的演化规律与光场强弱和两原子初始纠缠度相关联。在弱光场下,选择合适的两原子初始纠缠态,原子偶极矩可以完全被压缩。(2)相干态光场的强度和两原子的初始纠缠度对光场的量子特性也有很大的影响。光场的二阶相干性质和光场的压缩效应均与光场强度和两原子纠缠度相关联。在弱光场中,选择合适的两原子初始纠缠度,光场压缩深度和时间可达到最大。
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Of the eons of geological periods recorded in the stratifications of the earth: of the myriad minute entomological organic existences concealed in cavities of the earth, beneath removable stones, in hives and mounds, of microbes, germs, bacteria, bacilli, spermatozoa: of the incalculable trillions of billions of millions of imperceptible molecules contained by cohesion of molecular affinity in a single pinhead: of the universe of human serum constellated with red and white bodies, themselves universes of void space constellated with other bodies, each, in continuity, its universe of divisible component bodies of which each was again divisible in divisions of redivisible component bodies, dividends and divisors ever diminishing without actual division till, if the progress were carried far enough, nought nowhere was never reached.
349在地球的层理留下记录的太古以来的地质时代。隐藏在大地的洞穴里和能移动的石头底下、蜂巢和土墩子中那无数微小的昆虫类的有机生物:微生物、病菌、细菌、杆菌、精子;凭着分子的亲和之凝聚力而粘在一根针尖上那几万几亿几兆个多不胜数、肉眼看不到的微小颗粒;人类的血浆是一个宇宙,群集着白血球和红血球,每个血球又各自形成一个空虚的宇宙空间,群集着其他球体;各个球体连续性地也是由可分割的构成体形成的宇宙,各个构成体又可以分割成为几个能够进一步分割的构成体。就这样,分子与分母实际上在并未分割的情况下就不断地减少了。如果这个过程延续到一定时候,就永远在任何地方也不会达到零。
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In the impact feeling8.0N/m water cannot lay aside surpasses for 120 hours Cannot put inis loaded with the aqua fortis and in the strong sulfuric acid liquiddips After cannot achieve 10 minutes dangerous behaviors the chemicalreaction the detonation Cleanly washes using the clear water Lattercoolly does The product design has may transfer the size the livegrommet Finger when operation cuts through a revolution is thebedding bag is tight When does not operate So long as rotates thefinger about then may the automatic pine open the snare The safeconvenience is simple Pure natural not any to cancer chemistry dyeand chemistry pigment In the watery solution achieved the certaintime may change color the putrefication environmental protectionmaterial quality May pull outside the pulling force scope Thestandard general string YOYO ball string, the long ball string, theshaky ball string, slides the ball string.
单手冲力达到20kg的爱好者。3, 21stx12x2适合双手拉力达到50kg。可运行时间达3000小时。抗冲击力达到50kg每秒。最高时速3000公里。单手冲力达到40kg的爱好者。产品遇火即燃烧。熔点176.2oC生成热-573KJ/kg。爆热5343kj/kg。燃点180oC。冲击感度8.0N/m水中不能放置超过120小时。绝不能放入装有浓硝酸和浓硫酸的液体中浸洗。更不能达到10分钟之危险行为的化学反应后爆轰。清洁应用清水洗涤。后凉干。产品设计有可以调动大小的活绳圈。手指在操作时穿进一转即被套紧。如不操作时。只要把手指左右转动一下便可以自动松开圈套。安全方便简单。纯天然没有任何至癌的化学染料和化学色素。在水溶液中达到一定时间可变色腐化的环保材质。在拉力范围外可拉断。的标准通用绳子。
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The results of calculations showed that the maximum increments in saltation height and horizontal distance due to the Magnus force were 10.2 and 24.9%, respectively, and that both increments increased with increasing lift-off angle. The maximum increments in saltation height and horizontal distance of sand grains caused by the Saffman force were only 4.6 and 3.7%, respectively. The vertical concentration distribution of Aeolian sand flow follows exponential function distribution whether or not force analysis of saltating sand grains includes Magnus and Saffman force. The effect of Magnus and Saffman force on the vertical concentration distribution of Aeolian sand current makes the rate decrease near sand bed and it is consistent with the effects of Magnus and Saffman force on the saltation height and distance of sand grains.
Magnus力对跃移高度和水平距离产生的最大增量分别可达到10.2%和24.9%,这两个增量均随起跃角度的增加而增大;Saffman力对跃移高度和水平跃移距离产生的最大增量分别为4.6%和3.7%;是否考虑Magnus与Saffman力,风沙流垂向质量百分浓度均服从指数函数分布,Magnus与Saffman力使得风沙流垂向质量百分浓度较不考虑它们的作用呈现出底层的比例较小,上层较大,Magnus与Saffman力对跃移高度的影响基本与其对风沙流垂向质量分布的影响一致,不过Magus力对风沙流垂向质量百分浓度分布影响较大,0-2cm范围内尤为强烈(7.16-10.81),其他高度层(2-20 cm)的影响相对较小(0-2.95)。
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In this paper, with an original designed tool and selected welding parameters, 2024-T4 aluminum alloy sheets were friction stir welded successfully. A series of weld experiments were performed; the microstructure and the mechanical properties of the joints were analyzed. The influences of the welding parameters upon the quality of the joints were studied. The optimized welding parameters window was obtained in which high quality joints can be made and the tensile strength of the optimized joints were more than 80% of that of parent metal. The residual stresses of FSW joints have been investigated by using the Hole-drilling method.
本文自主设计搅拌头,通过选择合适的工艺参数,成功实现了硬铝合金2024-T4板材搅拌摩擦焊接;通过对接头成形和微观组织的研究得到可以实现焊接的工艺参数范围和工艺参数对接头成形的影响规律,并结合接头力学性能研究形成了接头性能与工艺参数之间的关系,并据此建立了优化工艺参数窗口,优化工艺参数下接头的抗拉强度可达到母材的80%以上。
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The epoxidation can be performedwell when the concentration of quaternary ammoniumsaltand sodium tungstate is 0.06 mol/L and 0.03 mol/L, respectively.
结果表明,季铵盐和钨酸钠的浓度分别为0.06,0.03 mol/L时的催化效果最佳;α-和β-蒎烯的转化率随着H2O2与蒎烯的量比增大而增大,当H2O2与α-蒎烯和β-蒎烯的量比分别为2.0和1.8时,其转化率均可达到100%;较高的温度不利于环氧化反应的进行,因此,环氧化反应温度需控制在20℃以下。
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Strausak Fine milling machine Typ 82 CNC / ATEK 5500 OPERATING/INSTRUCTION MANUAL(Strausak AG Maschinenfabrik CH-4573 Lohn/SO Schweiz/Suissse/Switzerland)[3]. CNC-Description with Hardware-Specification/ Standardversion for 7 axes (issue march 1992 GRUNDIG ATEK SYSTEM AG ATEK 5500)[4]. INTERACTIVE UNIX OPERATING SYSTEM VERSION 4.1 RELEASE NOTES (SunSoft Part No.:801-5068-10 Revision A,May 1993
对82CNC数控铣床PC控制主机的升级改造涉及硬件系统和软件系统两个方面:在软件方面,采用硬盘克隆的方式并注意掌握好克隆过程中的关键技术细节,根据升级后所选用的功能组件和运行的硬件平台的不同来合理地裁减和配置相关的内核、驱动、BIOS设置,不仅可达到&事半功倍&的效果,还能彻底摆脱外方在技术上的封锁和限制,构建真正适用于企业环境的MMI操作界面,并拥有灵活的组网方式和自主的维护方法。
- 推荐网络例句
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She gently rebuff ed him, but agreed that they could be friends
她婉言拒绝了,但同意作为朋友相处。
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If in the penal farm, you were sure to be criticized.
要是在劳改农场,你等着挨绳子吧!
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Several theories about reigniting and extinguishing of the arc have been refered.
本文综合考虑了几种电弧重燃和熄灭理论。