查询词典 hereditarily generating system

This thesis investigates the profile extraction and shape optimization on the result of topology optimization of planar compliant mechanisms. The main context includes the following work:(1) summarizing and analyzing the recent research status, some harvest and unsolved problems;(2) analyzing the conceptual design of planar path-generating compliant mechanisms and its mathematical model and tools;(3) Modifying the method of density contour as the method of profile extraction, and developing a method to optimize the density function in the profile extraction according to the requirement of the design of compliant mechanism;(4) developing a method to abstract the compliant mechanism into a form of links and joints by using the principle of connectivity on topology;(5) developing a method of shape optimization of planar path-generating compliant mechanisms, by representing the profile of the abstracted compliant mechanism as simple curves such as straight lines and arcs, establishing the models of the size optimization of the parameters of these curves, so that the compliant mechanism has a machinable shape;(6) At last, proving the feasibleness and effectiveness of the design method by making simulation design and validating it in FEA software.

主要工作包括：(1)分析了柔顺机构拓扑优化和形状优化的研究现状，分析了目前柔顺机构的研究重点、主要成果和尚未解决的问题；(2)分析了基于SIMP的柔顺机构概念设计方法及其相关工具和模型；(3)针对柔顺机构轮廓提取的特殊要求，提出了密度等值线法的改进方案，对密度函数插值点密度值进行优化，提出优化模型和选择优化算法；(4)根据轨迹输出平面全柔顺机构自身的形状特点，提出了轨迹输出平面全柔顺机构的抽象方法，即应用拓扑学上的连通性原理将柔顺机构抽象成杆件和结点形式，并对相应的数学原理进行了证明；(5)提出了平面全柔顺机构的形状还原和尺寸优化方法，对抽象的柔顺机构进行还原，将其轮廓还原成简单曲线的连接，从而建立尺寸优化模型，对机构进行尺寸优化设计，在得到可加工的机构轮廓的同时又能对关键部位进行特别处理；(6)进行了柔顺机构的数值仿真设计，并将所得设计结果导入商用有限元软件中进行仿真实验，证明了设计方法的可行性和有效性。

Maturity of Lower Cretaceous source rock, researched by the authors, is closely relative to the deposition thickness of the Tertiary and the Quaternary. It shows that source rock at the depth of 4,000-4,400m is low mature, and 4,400-5,200m is in the peak of oil generating. Correspondingly, the source rock of the Zhonggou Formation is immature; the Upper Xiagou Formation is low mature; and the Lower Xiagou Formation and the Upper Chijinpu Formation are in the peak of oil-generating; and the Lower Chijinpu Formation is at the stage of generation of condensate-wet gas with high maturity. There is no source rock reaching the overmature stage of dry gas at present.

可溶有机质转化率、镜质体反射率、热解、生物标志物特征等参数表明：青南凹陷中部的下白垩统烃源岩生油门限深度为4000m（相应的镜质体反射率为0.65％），埋深4000～4400m为低成熟阶段，埋深4400～5200m为成熟生油高峰阶段，因此中沟组烃源岩未成熟，下沟组上部烃源岩低成熟，下沟组下部和赤金堡组上部烃源岩处于成熟生油高峰阶段，赤金堡组下部烃源岩处于高成熟的凝析油—湿气阶段，目前尚无烃源岩达过成熟干气阶段。

The analysis of group component, stable carbon isotopic compositions and biomarker, and the geochemical characteristics of the oil and gas show that the oil comes from the Palaeogene and the oil reservoir is new bed-generating and old bed-storing; the gas comes from Carboniferous-Permian and the gas reservoir is old bed-generating and new bed-storing.

通过对油气族组成、稳定碳同位素组成及生物标志化合物进行油气地球化学研究，认为东濮凹陷三叠系砂岩裂缝性油藏原油来源于古近系，油藏类型为新生古储式；天然气来源于石炭-二叠系，气藏类型为古生新储式。

Microorganism not only is a kind of hydrocarbon- generating components participating in sedimentary organic matter formation directly, but also can impel "humic" organic matter to transform into "sapropel" organic matter, so as to improve organic type and raise hydrocarbon-generating potential of source rocks.

微生物不仅本身能做为生烃成分，直接参与沉积有机质形成，而且还可使&腐殖型&有机质转向&腐泥化&，改善有机质类型，提高源岩的生烃潜力。

Beijing's first steps down that path have included the shuttering of 54 gigawatts of old, small-scale, and inefficient power-generating facilities over the past three years, and raising China's overall coal-powered generating efficiency to a higher level than the US, says Professor He.

何教授说，中国宣布的第一步已经包括了在过去的30年中，淘汰了年发电量低于540亿瓦的发电厂，与美国相比，中国已经提高了其总体的煤电厂发电效率。

In this paper, the adjustment parameters of universal rolling disk in gear grinding machine, such as generating length, eccentric distance of generating and differential crank disk are calculated.

对磨齿机中常用的展成机构——万能滚圆盘的工作台展成长度、展成和差动曲柄盘的偏心量调整的计算过程进行了推导分析。

Different basin has different depth for main oil generating zone, so for main gas generating zone.

不同盆地有不同深度的生油主带，因而也有不同深度范围生气主带。

Li Yong'an, Three Gorges Project welcomed in three milestones in 2003, namely water filling of the reservoir, operation of the ship lock and power production of the generating unit; and further in September 2005, the 14 sets of hydro-turbine generating unit (700MW each) of the left-bank powerhouse were all connected on-line for power production; and in May 2006, approximate 10 months ahead of the preliminary design schedule and 2 years ahead of the expectation of the flood control performance, the Three Gorges Dam was completed and fully reached to its designed crest elevation of 185m, able to impound water with the whole structure of dam.

历任清江水电开发公司总经理兼湖北省人民政府副秘书长，中国三峡总公司副总经理。在李永安先生的领导下，长江三峡工程于2003年实现了蓄水、通航和发电三大目标，2005年9月左岸电站14台700MW水轮发电机组全部投产发电，2006年5月三峡主体工程大坝全线到达185米设计坝顶高程，具备全线挡水能力，工期比初步设计工期提前约10个月，提前两年发挥防洪能力。2006年10月，三峡水库蓄水至156米。

The method for determining a phase-noise spectrum comprises generating real complex samples, by digitally sampling a phase component and phase quadrature component of the input signal in baseband, determining ideal complex samples from generated real samples, establishing complex quotients from the real and ideal complex samples, generating modified complex quotients by assigning the value 1 to the complex quotients, and subjecting the modified complex quotients to a Fourier transform.

所述方法包括以下步骤：通过对基带中的所述输入信号的相位分量和相位正交分量进行数字采样，产生实际复数采样Areal(n(S100)；根据产生的实际采样Areal(n确定理想复数采样Aideal(n(S101)；根据实际复数采样Areal(n和理想复数采样Aideal(n形成复数商ΔA1(n＝Areal/Aideal；通过对所述复数商指定值1，产生经修正复数商B(n(S106)；以及对经修正复数商B(n进行傅立叶变换(S107)。

With development of the hydro-electrical in china, the scale of the hydropower station is becoming bigger and bigger, at the same time the hydro-electric generating set also trends large-scale, high-capacity and high-parameter. At this point the vibration problems of hydro-electric generating set has become more prominent, it requires not only found them and solve them in the course of the operation, but also avoid them in the design process.

随着我国水电事业的快速发展，水电站的规模越来越大，同时水轮发电机组也向着高水头、大容量、高参数的方向发展，此时机组的振动问题也日益突出，这不仅要求在运行过程中发现问题，解决问题，更要在设计过程中杜绝问题。

Panorama Many people are dancing in a large sitting room.

在一个大客厅里，许多人在跳舞。

We fully understand how a microwave oven cooks food, it is first necessary to talk ...

我们充分理解一个微波炉煮的食物，这是首先要谈。。。