周期性

基本解释 (translations)

periodicity  ·  cyclicity

与周期性相关的网络例句 [注：此内容来源于网络，仅供参考]

This paper presents an IFMC CAD model that consits of a geometry model and a material model, in which the geometry space acts as a base space and the material space acts as a bundle space. In this CAD model, the geometry model is based on the non-manifold model. In addition, a half-face data sturucture, which is derived from the half-edge data structure with the non-manifold feature of IFMC taken into account, is adopted to represent the geometry and topology information of the component. For the material model of IFMC, this paper focuses on the FGM component representation firstly and present a simplex-subdivision based CAD data exchange format, in which the material information is represented as a (n-1) simplex and material distributing feature is represented by the interpolation on the simplex-subdivision. Based on those, a part-building orientation optimization algorithm and an adaptive slicing algorithm for FGM component are presented in the paper. For the IFMC material model, the IFMC material information representation is divided into a meso-scale and a macro-scale representation. In the meso-scale, a concept named parameterized periodic functional meso-structure is presented as a unique form to represent the FGM (the homogeneous materials are regarded as a special FGM), the composite and the functional meso-structure material. The model of PMS is a three-tuple that contains the space state informatation, the material parameter and the material meso-scale distribution feature. The macro-scale material information representation is similar to the FGM components by interpolation of the control parameter of the periodical functional meso-structure based on the simplex-subdivision. Through an example of manufacturing-oriented IFMC CAD data processing, it is proved that the IFMC CAD model and the material information representation and process method proposed in this paper can provide a reliable data support for IFMC digital concurrent design and manufacturing.

本文将理想材料零件CAD模型建立在以几何空间为底空间、以材料空间为丛空间的结构上，使用非流形几何模型作为理想材料零件几何拓扑模型的基础，并在半边数据结构基础上，针对理想材料零件的非流形特征局限内部边界上的特点，给出了一个半面数据结构来表述零件的几何拓扑信息；对于理想材料零件的材料模型，本文先从功能梯度材料零件的信息表述与CAD数据交换和处理入手，将材料信息表述为（n-1）维单纯形，然后通过对三维几何区域的单纯剖分，以插值的方式表述零件材料分布特征；在此基础上，根据功能梯度材料零件分层制造中对CAD数据处理的要求，给出了综合考虑零件几何特征与材料特征的生长方向优化算法和自适应切片算法；而对于文中所定义的理想材料零件，本文将其材料信息表述分解到细观和宏观两个尺度进行，首先给出了细观尺度上参数化的周期性功能细结构概念，以此来统一表述功能梯度材料（单质材料作为特殊的功能梯度材料看待）、复合材料和功能细结构材料；把周期性功能细结构模型化为一个包含空间状态信息、材料构成参数和材料细观分布特征参数的三元组，以表达零件的细观材料特征；对于零件宏观的材料变化特征，则同样在几何区域单纯剖分的基础上，通过对细观尺度上周期性功能细结构控制参数的插值来完成；通过理想材料零件CAD数据处理的算例，验证了本文中理想材料零件CAD模型及材料信息表述与处理方法完全可以为理想材料零件的数字化制造提供可靠的数据支持。

This paper presents an IFMC CAD model that consits of a geometry model and a material model, in which the geometry space acts as a base space and the material space acts as a bundle space. In this CAD model, the geometry model is based on the non-manifold model. In addition, a half-face data sturucture, which is derived from the half-edge data structure with the non-manifold feature of IFMC taken into account, is adopted to represent the geometry and topology information of the component.For the material model of IFMC, this paper focuses on the FGM component representation firstly and present a simplex-subdivision based CAD data exchange format, in which the material information is represented as a (n-1) simplex and material .distributing feature is represented by the interpolation on the simplex-subdivision. Based on those, a part-building orientation optimization algorithm and an adaptive slicing algorithm for FGM component are presented in the paper.For the IFMC material model, the IFMC material information representation is divided into a meso-scale and a macro-scale representation. In the meso-scale, a concept named parameterized periodic functional meso-structure is presented as a unique form to represent the FGM (the homogeneous materials are regarded as a special FGM), the composite and the functional meso-structure material. The model of PMS is a three-tuple that contains the space stateinformatation, the material parameter and the material meso-scale distribution feature. The macro-scale material information representation is similar to the FGM components by interpolation of the control parameter of the periodical functional meso-structure based on the simplex-subdivision.Through an example of manufacturing-oriented IFMC CAD data processing, it is proved that the IFMC CAD model and the material information representation and process method proposed in this paper can provide a reliable data support for IFMC digital concurrent design and manufacturing.

本文将理想材料零件CAD模型建立在以几何空间为底空间、以材料空间为丛空间的结构上，使用非流形几何模型作为理想材料零件几何拓扑模型的基础，并在半边数据结构基础上，针对理想材料零件的非流形特征局限内部边界上的特点，给出了一个半面数据结构来表述零件的几何拓扑信息；对于理想材料零件的材料模型，本文先从功能梯度材料零件的信息表述与CAD数据交换和处理入手，将材料信息表述为(n-1)维单纯形，然后通过对三维几何区域的单纯剖分，以插值的方式表述零件材料分布特征；在此基础上，根据功能梯度材料零件分层制造中对CAD数据处理的要求，给出了综合考虑零件几何特征与材料特征的生长方向优化算法和自适应切片算法；而对于文中所定义的理想材料零件，本文将其材料信息表述分解到细观和宏观两个尺度进行，首先给出了细观尺度上参数化的周期性功能细结构概念，以此来统一表述功能梯度材料(单质材料作为特殊的功能梯度材料看待)、复合材料和功能细结构材料；把周期性功能细结构模型化为一个包含空间状态信息、材料构成参数和材料细观分布特征参数的三元组，以表达零件的细观材料特征；对于零件宏观的材料变化特征，则同样在几何区域单纯剖分的基础上，通过对细观尺度上周期性功能细结构控制参数的插值来完成；通过理想材料零件CAD数据处理的算例，验证了本文中理想材料零件CAD模型及材料信息表述与处理方法完全可以为理想材料零件的数字化制造提供可靠的数据支持。

The latest chemical product prices fell, demand has not really visible downstream, the short-term rise in oil prices in the channel, in which phase fluctuations, we continue to be optimistic about with anti-cyclical businesses and new materials, anti-cyclical embodies New Chemical Materials decrease in prices of raw materials is less than the decrease in prices of raw materials at the same time, the cost shift ability, to maintain price stability; civil explosive materials companies fell as a result, prices, countries can enjoy the benefits of; domestic urea production capacity excess of export disruption, high product costs, industry consolidation is inevitable, so concerned about the urea industry with technical advantages and cost advantages of urea enterprises: China Shandong Hengsheng; Although the overall situation of excess nitrogen, but because of the regional characteristics of the domestic fertilizer domestic part of the region will be in a high urea prices, the relevant listed companies will benefit from, such as the Liao Tung Chemical; compound assets as light industry, with the weak cyclical characteristics, the stability of industry profitability, industry leaders concerned about the compound: para Tian shares ; potash by the international market, short-term decline of domestic potash fertilizer prices would have difficulty, Salt Lake Potash in 2009 will be guaranteed a profit, Salt Lake Potash concern.

最新化工产品价格出现下跌，可见下游需求并未真正起来，短期石油价格处在上升通道，在这种上下波动阶段，我们继续看好具有抗周期性的新材料企业，抗周期性体现了化工新材料的产品价格下降幅度小于原料的下降幅度，在原料价格上涨同时，成本转嫁能力较强，价格维持稳定；民爆企业由于原料下跌，价格上涨，可以享受国家指导价的益处；由于国内尿素产能过剩，出口受阻，产品成本居高不下，行业整合在所难免，因而关注尿素行业内具有技术优势和成本优势的尿素企业：华鲁恒升；虽然氮肥全局过剩，但由于国内化肥的区域性特征，国内部分区域尿素价格将处于高位，相关上市公司将因此受益，如辽通化工；复混肥作为轻资产行业，具有弱周期性特点，行业盈利稳定，关注复混肥行业龙头：芭田股份；钾肥受制于国际市场，短期内国内钾肥价格恐难下跌，09年盐湖钾肥盈利将会有保证，关注盐湖钾肥。

Lipper China, in charge of research that Feng Zhiyuan, banking, real estate, cement industry is cyclical, and so on to support China's economic growth in key industries, China's fixed asset investment in post-Olympic significant growth, although China's third Quarter slowdown in economic growth, but the cyclical industry has returned to growth momentum, coupled with the cyclical stocks trade lower rate, this is the beginning of QFII fund's main holdings.

理柏中国研究主管的，即丰志远，银行，地产，水泥行业是周期性的，等等，以支持中国的重点行业，中国在固定资产投资后奥运经济增长的显着增长，虽然中国在第三季经济增长放缓，但周期性行业又回到了增长势头，经济的周期性行业的股票，加上低利率，这是我国QFII基金的主要持有的开始。

According to the long wave theory, it is the cyclical movement of technology innovation that causes the cyclical movement of economy.

经济长波本质上可以说是熊彼特所说的创新周期，技术进步的周期性变化引起了经济的周期性波动，长波经历的时间内在地表现为技术进步周期性变化经历的时间。

After the transient temperature distribution has reached dynamic equilibrium, because of radius temperature gradient periodically changing with time, the optical path difference between center and edge beam is also periodically changing with time.

当晶体温度达到周期性分布后，由于晶体径向温度梯度的周期性变化，引起通过晶体的平面光波的中心和边缘光线相对光程差也随时间作周期性变化。

Set pitch or low frequency surge can bring the roulade of the periodic change to the volume. To set the low frequency surge or controller can bring quaver. And set the both can make the timbre bring periodic rocky purpose. We edit out the percussion timbre that adapts the musical style and character, during the editing course, the percussion timbre is decided by our musical understanding.

通过设定音高包络或低频振荡调制可产生周期性变化的颤音效果，通过设定包络、低频振荡器或控制器，可以产生音量周期性变化的震音效果，通过滤波器消除声音中的杂质，通过包络、低频振荡器或控制器的设定，使音色产生周期性晃动的哇音效果，音源在研发的过程中已经对各种鼓音色进行了设定，我们使用编辑制作出适合音乐风格和特点的打击乐音色，在编辑制作过程中，人脑对音乐的理解将最终决定打击乐的音色。

This thesis aimed to discuss an electromagnetic energy harvester. Motion of a fluid driven by a 30 Hz pulse pump is used to activate the electromagnetic energy harvester. The periodic motion of the fluid in the chamber causes a harmonic vertical deflection in the diaphragm on which a permanent magnet is attached. Subsequently, the vibration of this magnet induces an output voltage in a solenoid hanging above it.

中文摘要本文是探讨电磁式能量产生器的机构，此电磁式能量产生器的主要作动方式为藉由频率30Hz的脉冲马达驱动工作流体，使工作流体呈周期性的流动让帮浦腔体上致动薄膜产生周期性的上下往复运动，因此帮浦腔体内产生压力周期性的变化，在薄膜上永久磁铁的振动，使得螺旋线圈感应产生电压的输出。

The model of coexistence of three types of algae is able to simulate algal succession.

三种藻共存模拟可以模拟出藻类周期性的消长，推测呈现周期性的变化的主要原因周期性的水体混合机制所致。

Through the statistic and observation of the histological cycling on skin and hair follicle regarding Inner Mongolia Arbas and Liaoning cashmere goats as matierial, the cycling is the same between the two kinds of goats. The reconstruction of the hair follicle is from the connection of the epithelial and mesenchymal. In this period, the secondary hair follicle appears as groups, and the thickness of the epidermis of skin also is different, the high peaks of each characteristics of secondary hair follicle fall behind of the primary hair follicle for a month mostly.

通过对内蒙古阿尔巴斯绒山羊和辽宁绒山羊皮肤毛囊形态结构周期性变化的统计观察表明，二者周期性变化基本相同；初次级毛囊形态结构的周期性变化也基本相似，但周期并不相同；毛囊的重建是从上皮细胞与间叶细胞的连接开始的，次级毛囊在重建过程中是成群出现的，皮肤表皮的厚度也呈周期性变化，次级毛囊各性状的高峰大都落后初级毛囊一月。

与周期性相关的网络解释 [注：此内容来源于网络，仅供参考]

aperiodicity：无周期性,非周期性

aperiodic wave 非周期波 | aperiodicity 无周期性,非周期性 | Apertometer 数值口径计

cyclical inflation：周期性通货膨胀

cyclical fluctuation 周期性波动 | cyclical inflation 周期性通货膨胀 | cyclical nature of the economy 经济的周期性情况

cyclical inflation：周期性通货膨胀Pmd中国学习动力网

cyclical fluctuation 周期性波动Pmd中国学习动力网 | cyclical inflation 周期性通货膨胀Pmd中国学习动力网 | cyclical nature of the economy 经济的周期性情况 Pmd中国学习动力网

periodic outbreak：周期性猖獗, 周期性大发生

cat-and-dog 吵吵闹闹的, 不和的 | periodic outbreak 周期性猖獗, 周期性大发生 | merchant shipping 商船运输

periodic outbreak：周期性猖獗

periodic oscillations 周斯摆动 | periodic outbreak 周期性猖獗 | periodic paralysis 周期性麻痹,周期性瘫痪

periodic paralysis：周期性瘫痪

第三节 周期性瘫痪 (periodic paralysis) 周期性瘫痪是以周期性反复发作的骨骼肌短暂性弛缓性瘫痪为特征的一组疾病. 按发病时的血清钾浓度和症状可分为低血钾型、高血钾型和正常血钾型三型,其中以低血钾型最多见. [病因与发病机理] 本病的病因及发病机理迄今尚未阐明.

periodic paralysis：周期性麻痹,周期性瘫痪

periodic outbreak 周期性猖獗 | periodic paralysis 周期性麻痹,周期性瘫痪 | periodic pattern 周期的パターン

periodic error integrating controller：周期性误差积分控制器

周期性倾印分时 periodic dumping time sharing | 周期性误差积分控制器 periodic error integrating controller | 周期性框架 periodic frame

periodicity interval：周期性区间

periodicity 周期性 | periodicity interval 周期性区间 | periodicity of function 函数的周期性

Cyclical fluctuations：周期性波动 周期性变动

cyclical field || 循环场, 周期场, 旋场(旋度不等于零的矢量场) | cyclical fluctuations || 周期性波动 周期性变动 | cyclical income index || 周期性收入指数