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The Lagrange motion equation of the system is established, and synchronous movement is studied. Exact solution of synchronous movement is presented and movement disciplinarian is studied. It proved that under certain condition, it exist periodic motion.
在本文中对该模型建立Lagrange运动方程,主要研究其同步运动,求出同步运动的精确解,并分析其运动规律,证明了在一定条件下存在周期解。
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The main contents of the paper are following:1、 Based on the engineering of brige steel factory, the techniques for installing measure and monitoring of cranebeam and orbit are studied with the method of reflectorless- equipment-highless;How to set up the centricity of hot-rolling equipment is discussed, what's more, the precision is analyzed;the methods of construction laying-out and prependicularity measuring for large chimney are discussed.2、 The techniques of the short baseline precise inspection applicable for industrial inspection is studied.
本文的主要研究内容如下: 1结合大型钢铁厂工业安装工程,对行车梁及其轨道安装测量与检测技术进行研究,采用了免棱镜无仪器高检测方法;对热轧压延设备中心线的布测方法进行了研究,并对布测精度进行分析;讨论了大型烟囱施工放样及其垂直度检测方法。
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The conversion boundary of self-incompatibility was researched by sowing by stage. Sunshine of day and temperature was studied critically by investigating leafage and researching traits indoors. The results showed that the daily minimum temperature was the principal factor of affinity conversion and the affinity conversion boundary was 16.5~18.1℃.HE97 was primarily regard as self-incompatible line in this research. The method was by inbreeding and sib HE97, Half the silk of HE97 and Zheng58. Inbreeding and cross have been done simultaneously. The extending condition of pollen tube was observed by dying the silk after pollinating 4 hours. The individuals with pollen tube were observed having seeds, while the individuals without pollen tube were observed having few seeds or no seeds. So this study regard HE97 as sporophytic self-incompatibility .The planting ration of female parent HE97 and male parent 87-1 was 4:1.The nature cross-pollination was studied by the theory of endosperm xenity, the study show that the setting percentage of HE97 was 625%, in which the seed in self was 70% and the seed in hybrid was 30%. This was consistent with the study of silk anatomy structure, then come to the same conclusion: compatible pollen germination and fertilization can stimulate the self-incompatible pollen germination and fertilization in the same corn cob.
通过分期播种,进行了光温敏自交不亲和材料HE97亲和性转换区间的研究,依据田间跟踪调查叶龄及室内考种研究了HE97亲和性转换区间的光温临界值,结果表明:1日最低温度是影响HE97自交不亲和性的主要原因,亲和性转换区间在16.5℃~18.1℃之间。2通过HE97自交和姊妹交以及将HE97与郑58作为双亲,各自的花丝一分为二,分别正反交,授粉后4个小时分别取其花丝进行固定、染色,观察花粉管的伸长情况,根据结实率与花粉管伸长的对应关系,结果发现观察到花粉管的对应植株收获到了种子,而没有观察到花粉管的对应植株结实率极低或没有结实,本研究把HE97初步划为孢子体自交不亲和类型。3以HE97为母本,87-1为父本,按4母:1父行比,通过花粉直感效应研究天然异交率,结果母本HE97结实良好(62%),其中自交粒占70%,异交粒占30%,结合花丝切片观察表明,亲和花粉的萌发及受精会导致落在同一果穗柱头上不亲和花粉的萌发不再受抑制。
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This study deals with butterfly diversity and conservation of rare as well as insect fauna species in Baishuijiang Natural Reserve in Gansu Province. The research includes field investigation, observation at certain time and places, captive breeding in experimental area etc. Butterfly species diversity in Baishuijiang Natural Reserve and variation regulation of butterfly diversity in different areas are studied. The relationof butterfly diversity with environmental factors such as vegetation destruction, human disturbance are strenthened in Bifeng Gully. The biology of two rare butterfly species is studied. Meanwhile, this study deals with insect α-diversity and β-diversity in Baishuijiang Natural Reserve and inquire into the mechanisms of ecological control by protecting and recovering vegetation. The research includes field capture with sweeping net, light trap, transect investigation.
在甘肃省白水江自然保护区碧峰沟通过野外调查、定点定时观察、实验地饲养等研究了白水江自然保护区两种珍稀蝴蝶红基美凤蝶和巴黎碧凤蝶的生物学特性,在保护区范围内通过网捕采集研究了蝶类物种多样性和不同区域内蝶类多样性的变化规律;同时在碧峰沟四种不同生境中通过灯诱获得标本,研究了该地区不同生境中的昆虫种类组成及其多样性,分析了决定物种丰富度的关键因子,与蝶类多样性进行了比较分析,并提出了具体的保护措施。
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The orthophotomap has been used in the regional geological survey and minerogenetic prediction in the studied region. The interpreted geological map, linear and circular structural map and minerogenetic prediction map in the studied region have been...
研究中应用新研制的正射遥感影像进行地质解译和地质、物探、化探、遥感等多元地学信息综合与复合处理及成矿预测,完成了试验区1∶5万解译地质图、成矿预测图等系列图件,取得了显著效果。
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By the definition of Green-relation and the analogue of generalized Greens lemma, this paper first studied some properties of H-class、 D--class of rpp semigroups, then by left S-system 、-bisystem and tensor product, we described a blocked Rees matrix semigroup. Especially, the paper studied primitive rpp semigroups .
本文利用在rpp半群上定义的广义Green~(l-关系及相应的广义Green定理,首先研究了rpp半群H~(l-类、D~(l-类的若干基本性质,然后以左S-系、-双系和张量积作为工具,刻画了块Rees矩阵半群结构,最后从带零的本原rpp半群出发,构造出A型块Rees矩阵半群,并证明了一个半群S为本原rpp半群,当且仅当S同构于一个A型块Rees矩阵半群。
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Reduced SQP based on orthonormal bases, orthogonal bases and coordinate bases are studied and compared. With the correction item introduced, the null-space move is adjusted and the reduced SQP based on coordinate bases decomposition is improved.●The key problem of steady-state data processing for RTOPT is studied. A new algorithm of simultaneous strategies for data reconciliation and gross error detection is proposed. Here the objective function that is constructed using maximum likelihood principle and joint distribution function is minimized. Efficient algorithm is developed which exploited the nonlinear lease-square structure of this objective function.
仿真结果表明了算法的有效性;●深入研究了在线优化中的一个关键问题——稳态数据处理问题,用基于组合概率分布的目标函数联立求解粗劣误差检测和数据调和问题;以精馏塔在线优化的数据处理和模型修正为例,提出一种根据模型方程对参数的依赖性进行过程模型分解的分层策略,可以将数据调和和参数估计统一在数据处理的大框架中,为进一步的过程性能分析、操作状况评价以及在线优化提供可靠的基准,具有非常重要的工程应用价值;●将优化命题的形式扩展到更通用的形式。
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This project studies the scale-dependent deformation behavior of the metal matrix composite, the void nucleation and void growth mechanisms at the micron/submicron scale. The main results are:(1) In prophase, growth and coalescence of the void embedded in the graded matrix are analyzed in detailed;(2) Based on the infinite solid model containing a micro-void, coupling effects of the void shape and the void size on the void growth are studied carefully, the results show that it seems to exist a critical equivalent void radius, which is associated with the material length. When radius of a microvoid is close to or smaller than the critical void radius, the micro-void growth rate is essentially eliminated;(3) The coupling effects of the particle shape and size on the mesoscopic stress fields within the particle and matrix are also investigated by introducing the conception of inclusion/matrix interfacial energy. The results show that the stress concentration factors within the particle and on the matrix/particle interface are also strongly size-dependent,so the void nucleation mechanism is size-dependent.(4) By employing a specific orthogonal curve coordinate frame and a 'kernel function' conception, a 'unified method'solving the spheriodal and spherical void problems is suggested; by this unified method, size-dependent plastic potentials of the porous materials containing the spheriodal or spherical voids are obtained, which extend the traditional Gurson model for the spherical void and GLD model for the spheriodal voids to the micron scale.(5) Based on the RVE model containing the spheriodal or spherical particles, the influences of the particle shape and size on the size-dependent mechanical behavior of metal matrix composite are studied.
中文摘要:本项目对金属基复合材料在微细观尺度下的尺度相关变形行为、孔洞形核及长大的机理和模型进行了研究,取得了如下主要结果:1)在前期研究中,探讨了基体的梯度分布对孔洞长大和聚合的影响;2)基于含孔洞的无限大体模型,探讨了孔洞形状和孔洞尺寸对其长大的耦合作用,结果表明:可能存在一个与材料特征长度相关的临界孔洞尺寸,当椭球孔洞的等效半径小于临界孔洞半径时,孔洞的长大受到明显抑制;3)通过引入基体/夹杂界面能的概念,分析了夹杂尺寸、夹杂形状对材料细观应力场的耦合影响,结果表明:颗粒内部和界面上的应力集中因子强烈地依赖于夹杂的尺寸和形状,因此,孔洞的形核机理是尺寸相关的;4)采用一种特殊的正交曲线坐标系和引入"核函数"的概念,"统一"地得到了含椭球和球形孔洞的材料的尺寸相关塑性势,它将传统的Gurson球形孔洞模型和GLD椭球孔洞模型推广到微尺度范围;5)基于含椭球和球形夹杂的体胞模型,初步研究了夹杂形状、夹杂尺寸对金属基复合材料尺寸相关力学行为的影响。
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The performance of this structure and the corresponding algorithm is studied.(6) The concept of hash function mapping uniformity ratio is proposed. With it, the mapping uniformity of modular based hash function is studied.
6就哈希映射的均衡性问题,提出了哈希映射均衡度的概念,并对基于取模运算的哈希映射均衡性进行了深入的研究。
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The mechanical behaviour of anchorage foundations is then further studied by comparing that of a caisson without anchors. Meanwhile, the distribution of moment on anchor is analyzed; and the influence of anchors' embedded depth on the bearing capacity is studied.
在此基础上,通过无根键沉井基础和有根键沉井基础的受力特性对比,分析了根式基础的受力特性,对根键上的弯矩分布型式进行了研究,并探讨了根键沿深度位置分布对根式基础承载力的影响。
- 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