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The paper induces and analyzes research method of the tooth, including Method line of the tooth theory,Envlopment theory, Camus theory, Circling cluster theory and so on.Based on the past theories,the new measure to deduce the chain wheel tooth equation of roller chain at high speed,Circling cluster and envlopment theory,is proposed by analyzing basic concept of equidistant curve and Willis theory.Following the presentation of drawing lessons from traditional roller chainof the change of stanza line distance. A new type of roller chain at high speed is given in the paper.The paper studies deeply structural characteristics, the change of stanza line distance,separation between plank and bore and so on.According to design requst of roller chain at high speed and the study ofH_y--V_0 tooth chain,the impossibility that Quasi-conjugage engagement theory isrealized by the engagement of roller chain at high speed from the aspect of theory is decribed.
作者综述了高速滚子链国内外研究现状,并进行了以下研究工作:归纳分析了齿形法线法理论、包络法理论、卡姆士定理、圆族法理论等齿形研究方法,在此基础上,结合齿形啮合基本定律,分析了等距曲线的基本概念,提出了一种推导高速滚子链链轮齿廓方程的新方法—圆族包络法;在借鉴普通变节距滚子链的基础上,本文提出了一种新型的高速滚子链链条,深入研究了高速滚子链链条结构特性及其变节距、板孔中心分离等特性。
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Applying combined method of quantitative analysis and qualitative analysis, on the basis of on ago research fruit, this paper firstly analyses main factors that affect the safe distance from friendly force to target for tank gun overhead firing systemically. Based on that, this paper builds math model of calculating the safe distance from friendly force to target separately aiming to the difference of tank gun overhead firing in plane and undulate terrain. At last, through applying Mathematica soft, this paper presents the safe distance from friendly force to target for a tank gun overhead firing used APFSDS, HEAT and HESH, combined qualitative analysis.
采用定量分析和定性分析相结合的方法,在以往研究成果的基础上,首先系统地分析并提出了影响坦克炮超越射击时友军至目标安全距离的主要因素;以此为基础,针对平坦地形和起伏地形上坦克炮超越射击的不同情况,分别建立了确定友军至目标安全距离的数学模型;最后通过运用Mathematica软件进行定量计算,并结合定性分析,提出了某型坦克炮使用尾翼稳定脱壳穿甲弹、空心装药破甲弹和杀伤爆破榴弹进行超越射击时友军至目标的安全距离。
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The maximum run-out distance is 3200m. The three cases are studied from the Niuquangou rockslide-debris flow at the south west segment of the main seismic fault, the Chengxi rockslide at the middle segment of the main seismic fault and the Donghekou rockslide-debris flow at the north east segment of the main seismic fault.The three cases illustrates following common characteristics:(1)parent rockmass is broken under long geologic processing and weathered;(2) Rockmass was separately expanded and thrown under long-period strong ground vibration in which the vertical motion was predominant along the main seismic fault;(3)sliding mass was crashed at the exiting zone and transferred to fragment material;(4) The secondary landslide was triggered underneath the exiting zone due to the powerful crashing and shaving processes that provides more mass to debris body and cushion shape;(5) The a long run-out distance fragment flow is occurred under air layer lubrication. The air layer was pressed and turbulently flowed in the narrow-shaped valley, or laminarly flowed in the extensive flatland.
本文重点解剖了位于地震破裂带南西段的汶川映秀牛圈沟滑坡-碎屑流、位于地震破裂带中段的北川城西滑坡和位于地震破裂带北东段青川东河口滑坡-碎屑流3个典型实例,认为具有如下特征:1)岩性条件:母岩遭受长期构造动力作用,呈碎裂岩体,后期被强烈风化,岩体极为破碎;(2)抛掷效应:位于汶川地震主断裂带或附近,垂直加速度大于水平加速度,强地面运动持时长,岩体发生振胀和抛掷;3)碰撞效应:上部滑坡体发生高位剪出和高位撞击,致使岩体碎屑化;(4)铲刮效应:撞击作用导致下部山体被铲刮,形成次级滑坡,为碎屑流体提供了足够展翼和抛洒物源体积;5)气垫效应:碎屑化岩体快速抛掷导致下部沟谷空气迅速谷状圈闭和向下紊流,形成气垫效应,或者,在下部地形开阔地带压缩空气呈层流状态致使滑体凌空飞行。
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As for the first, which was so vastly big, as I made it without considering before-hand, as I ought to do, how I should be able to launch it; so never being able to bring it to the Water, or bring the Water to it, I was oblig'd to let it lye where it was, as a Memorandum to teach me to be wiser next Time: Indeed, the next Time, tho' I could not get a Tree proper for it, and in a Place where I could not get the Water to it, at any less Distance, than as I have said, near half a Mile; yet as I saw it was practicable at last, I never gave it over: and though I was near two Years about it, yet I never grutch'd my Labour, in Hopes of having a Boat to go off to Sea at last.
这是由于我事先没有考虑到船造好后的下水问题,而这问题是我应该预先考虑到的。现在,那艘独木舟只能躺在原地留作纪念,教训我下一次应学得聪明些。这一次,我没能找到一棵较合适的树,而且,还需把水从半英里以外引过来。然而,当我看到有成功的希望时,就不愿放弃这一机会。虽然造成这条小舟花了将近两年的时间,我却从未偷懒或厌烦。我一直希望,迟早有一天我能坐上小船到海上去。
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Hypercube has many advantages, such as smaller diameter, simple routing algorithm, many parallel paths between any two nodes, and fault-tolerance, on the other hand that the Hypercube nodal degree increased logarithmetically to the number of nodes has limited network population. So we propose a constant nodal degree hierarchical topology to remedy the weakness of Hypercube and take advantages of Hypercube most. Given the definition of FCCN we analyse the basic properties including nodal degree , number of links , extensibility and diameter (maximum network communication delay). Also we proposed a simple and self-routing algorithm applied in FCCN. Although the self-routing algorithm is not optimal, but at more than 82% case it can get the shortest path, and the percent is larger and larger increased with network levels. By the self-routing algorithm the internodal distance is calculated to evaluate the network communication delay more clearly. The average internal distance is in order of the cubic root of the network population that is almost same as logarithmetically relation in a few thousands. FCCN is a highly scalable network due to its recursive construction.
首先在比较了基本互连网络的基础上,看到超立体网络的杰出性能,包括网络直径小、寻路算法简单且为自寻路算法、容错能力好等等,但是由于其节点度随网络的规模的增加而按对数关系增长,使得超立体网络的应用规模受到极大限制,所以为了能最大限度利用超立体网络的优点的同时弥补其节点度方面的不足,作者提出了节点度等于常数4的FCCN网络结构,来最多地利用立方体网络的优点;然后在对FCCN网络进行严格的定义后,分析了网络的节点度、链路数、延伸特性、网络的直径(决定网络的最大通讯延迟)等,并提出了适于FCCN网络的简单的自寻路算法,计算自寻路算法可得到最短路径的比例,看到在多于82%以上的情况自寻路算法都是最优的,而且比例随网络层数的增加而增加;应用所提出的自寻路算法计算了可以更加准确反映网络通讯延迟的参数—网络平均节点距离,计算得到此参数与网络大小的立方根成正比,此比例关系在网络的规模在几千节点以内与对数关系的网络几乎一样;FCCN网络是一高度可扩展结构,这是因为FCCN的递归构成方式,使得网络在增加节点时其原有的拓扑结构可以保持不变,不需对网络进行重新设计,为网络的实用扩展提供了条件;理论分析得出FCCN网络是一种高度可扩展高性能网络的结论。
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The results showed that 7-day-precultured embryogenic calli had the best responses for bombardment among 2-7 day' preculture duration. Enhanced transformation efficiency was found in the explants treated with high osmotic medium 4h prior to till 24 h after bombardment. Particles of gold and tungsten were both found suitable for rice transformation and there was no adverse effect when tungsten particles were reduced to 1/3 standard amount for DNA precipitation on transient GUS gene expression. However, it was found that gold particle had higher GUS expression at 120 h post-bombardment. A preliminary microprojectile transformation system with an average of 15-20 blue spots/explant GUS expression was routinely obtained for 'Tainung 67' by using the particle gun with 1,100 psi rupture disk, 6 or 9 cm microcarrier flight distance and 4 mm of macrocarrier flight distance setting.
初步结果显示,以预培养2~7日之胚性癒合组织逐日测试转殖率,以预培养7日之培植体表现最佳;培植体於转殖前4小时至转殖后24小时以高渗透压培养基处理,有助於转殖效率之提高;比较金、钨粒子对转殖率在转殖后48h並无不同,但转殖后120 h取样,则金粒子组有较高之蓝点数;钨粒子用量可减少至1/3標准用量对转殖率並无影响;利用基因鎗在使用1, 100 psi裂碟片、大载片至挡片之距离为4 mm、微载髁至射击目標之飞行距离6或9 cm之设定,GUS基因表现之平均蓝点数均可达15~20个/培植体。
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This paper compares the traditional distanceeducational management systems with modern distance educational management systems and studies the distance educational management systems at home and abroad, on the basis of which a modern distance management system has been built to administer the modern distance education scient...
在对传统远程教育管理与现代远程教育管理的比较和对国内外远程教育管理系统的研究分析基础上,提出了一个现代远程教育管理模型,以期建立一个新型教育管理模式,对现代远程教育进行科学的管理
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At last, the trend of miss distance measurement technology is forecast. For vector miss distance measurement system, Doppler radar and impulse radar are widely developed. The system based on impulse radar has a promising development future.
矢量脱靶量测量技术的发展主要集中在多普勒雷达和冲击雷达两种体制上,其中采用冲击雷达技术的矢量脱靶量测量系统是今后发展的重要方向。
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Wynners Yes I saw you at the station Long distance smiles You were leaving for the weekend Catching the four fifty-five With your new friend for the season Another sad-eyed clown Helping to the seeing that your fantasies go down And I have to wonder to myself Why you have to go so far Drifting with life's daydreams Trying to play the star I still remember when you said "Baby, now let's get away" And I followed you like a schoolboy I guess that's part of the game Now you call me say you're sorry Give me long distance love You say you'd like to see me Maybe just for a while And you'd meet me at the station There on platform nine And we'd leave for the weekend Riding the four fifty-five But I've played this scene too many times To ever feel the part again I don't really want to fake it I already know the end So bye bye, Cin-Cinderella Everything just has to change And the midnight blues are calling I guess that's part of the game
四点五十五分温拿五虎合唱团在车站看见你远远的带著笑容你正准备要度周末搭乘4:55的班车带著你这一季的新朋友另一个眼神哀凄的小丑帮助我看清你那些沉沦的幻想我不禁感到怀疑你为何要远去带著人生的白日梦四处漂流想要当大明星我还记得你曾说过:&宝贝,让我们远走高飞吧!&而我竟像个小学生一样跟著你我想那是游戏的一部份如今,你打电话来道歉给我一份遥远的爱你说你想见我或许只要一会儿你想约在车站见面就在九号月台我俩可以共度周末搭乘4:55的班车但这一幕我已演过太多遍了再也无法入戏我实在不想骗你我早就知道结局再见了,灰姑娘这一切都得改变当午夜的蓝调在召唤你我想那是游戏的一部份伍佰每次在演唱会上唱起这首歌的国语版:爱你一万年,总使我愈发想念第一次听英文原曲时的感动。
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The authors analyze the operation characteristic of distance protection of transmission line connecting wind farm with power grid under the variation of parameters such as the amplitude ratio of electromotive force at both sides, the phase difference of electromotive force at both sides, equivalent impedance of sources, system frequency and so on; based on the real-time current and electromotive force at wind farm side as well as the information of wind power generators participating power generation, a method to adaptively set the operation boundary of distance protection by use of the information at wind farm side only is proposed.
文章分析了风电场和电网联络线的距离保护随电源电势幅值比、电势相位差、电源等效阻抗、系统频率等参数变化时的动作特性,并基于风电场侧的实时电流和电势与参与发电的发电机信息,提出了仅利用风电场侧信息量自适应整定保护动作边界的方法。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力