周期的

On the base of the acoustics , a whole linear time - varying discrete speech produce model is established through anatomising the factors including track , driving source and lip eradiation the mechanism of speech in this paper , and we draw a conclusion that the time between glottal closure is pitch period

本文从声学理论出发，剖析了语音产生的机理，综合考虑声道、激励源和嘴唇辐射三方面的因素，建立了一个完整的、线性的和时变的语音产生的离散系统模型，得出两次声门闭合事件之间的时间间隔就是基音周期的结论。

Improve the accuracy of the initial rotor position estimator by using the Fourier series expansion.

在永磁同步的马达启动方面，则透过送出不同向量空间角度的定子电压向量脉冲所量测到的d轴定子电流的大小来估测转子的初始位置，并利用d轴定子电流在空间向量角度以2π为周期的特性，应用傅立叶级数分析做曲线拟合的方式提高转子位置估测解析度，以提高转矩/电流比节省不必要的功率浪费。

The conventional "fundamental" explanation for that cycle relates it to political events. The 1973-1974 oil crisis is said to have been due to the cutoff of oil following the Arab-Israeli Yom Kippur War. The 1979-1981 oil crisis is said to reflect the cutoff in oil due to the Iranian Revolution and the Iran-Iraq war. The drop in oil prices after the mid-1980's is said to be due to the collapse of the OPEC oil cartel.

对这个周期的传统的"基本"解释是将它和政治事件联系起来。1973-1974年的石油危机据说是因为阿拉伯－以色列赎罪日战争之后的石油停产。1979-1981年的石油危机据说反映了因为伊朗革命和伊朗－伊拉克战争导致的石油停产。20世纪80年代中期的石油价格下跌据说是因为欧佩克石油卡特尔的崩溃。

Secondly, the paper is expanded from follow three aspects: the virtual design, the virtual process and the product data managementduring the developing the torque converter. Applying the key technique of concurrent engineering---design for function, design for assemblyand design for manufactureof the method of design for "X", the virtual design of the torque converter is accomplished in CATIA V5. Then the model constitution and the simulation of virtual process of the torque converter is done in CATIA V5, including the model constitution and the simulation of 5-aixe NC virtual process of the vane, the model constitution（material:PVC） of the idler pulley rapid prototypingand the virtual assembly and the motion simulation of the torque converter, etc. 3-D data exchange between various CAD systems is realized by using STEP standard. The lever of classing the character model of the torque converter is given. And the access authorization is set up and given to manage the partners' reading/writing the product data.

应用并行工程的关键技术之一——面向产品全生命周期的设计DFX中面向功能的设计DFF、面向装配的设计DFA和面向制造的设计DFM的方法，在CATIA V5中完成液力变矩器虚拟设计；在CATIA V5中对液力变矩器进行虚拟加工建模和仿真，包括液力变矩器导轮叶片五轴数控加工刀轨建模与仿真、导轮快速成型RP建模、液力变矩器虚拟装配和运动仿真等；采用STEP标准实现多CAD系统之间三维数据交换，提出液力变矩器特征模型的分级标准并对三维模型数据进行分级管理，制定相应的权限等级以规范合作厂家的产品数据管理层次。

These results shed some new light in understanding the intergeneration transmission of human capital. First, it suggests that there is a causal relationship from parent's education to the education of sons and daughters. Second, the impact is larger at lower levels of schooling, and diminishes as schooling attainment increases for a given cycle of the formal education. Third, there appears to be a strong gender component in the intergenerational transmission mechanism.

这些结果为理解人力资本的代际传递提供了新的观点：其一，从父母的受教育程度到子女的受教育程度之间存在因果关系；其二，对于给定周期的正式教育而言，在教育水平较低时影响较大，随着教育水平的提高影响递减；其三，在代际传递机制中，存在强的性别成分。

The high resolution image of full hole can be obtained from the being processed imaging logging information, and the morphological features about intersecting lines of fracture face and borehole present monocyclic sine curve.

成像测井数据经处理后可得到全井壁高分辨率的图像，而裂缝面与井筒的交线在图像上的形态特征呈现为单周期的正弦曲线，应用哈夫变换的点－线对偶性拾取图像中的裂缝角度等信息，可得到较好的处理结果。

Experiment Validation of Hydrodynamics Model of Drum Level The experiment rig was designed, and the experiment equipment was also set up. The experiment results show: As the validation of sloshing period under different levels, maximum error between the results of the experiment and the model is within±10%. As the experiment validation of model under in-and-output flux, changing trends of results of the model and the experiment are consistent, though there is some error in sloshing amplitude, the numeric error is within±20%.

2汽包水位水动力学模型的实验验证设计了实验台架，并建立了实验装置，实验结果表明：就不同水位情况下晃荡周期的验证而言，实验结果与模型计算结果之间的数值误差在±10%以内；就有进出口流量的情况下模型的实验验证而言，模型仿真结果的变化趋势与实验结果基本上是一致的，尽管晃荡幅度和相位上还是存在一定的误差，但其数值误差在±20%以内。

The discovery of annual density bands of mass coral skeleton had a profound effect on coral paleoclimatology, and many patterns of density bands have been revealed throughout the global tropic ocean since then. At the first stage, people tended to explore the control factors of density changes from the environment where the coral grows, but they did not succeed. Since later part of 1980s, some researchers have focused on the skeletal architecture and integrated the signals of both environment condition and skeleton density bands to reveal the mechanism of skeleton density changes, and finally a model of skeleton growth was developed which can explain the almost existed patterns of skeleton density changes.

块状珊瑚骨骼密度条带年周期的发现对后来的珊瑚古气候研究产生了深远的影响，随后又发现世界各热带海域的珊瑚存在多种多样的骨骼密度变化模式，起先常从珊瑚的生长环境中寻找骨骼密度变化的控制因素，但是没有成功，从80年代后期，部分学者试图从珊瑚骨骼构架本身出发、综合考虑环境因素和骨骼密度条带之间的关系来探求骨骼密度变化的机理，并提出了一个可以解释大多数块状珊瑚骨骼密度条带变化模式的骨骼生长模型。

We show that the combined oxygen and carbon isotope systematics are identical to those of well understood Phanerozoic examples that lithified in coastal pore fluids, receiving a large groundwater influx of photosynthetic carbon from terrestrial phytomass.

被广泛报道的新元古代碳酸盐中13C/12C 比例的下降并非是碳周期的波动，它们更容易通过与显生宙样品类比来理解。这个结果可能表明，在前寒武纪晚期，受由能够进行光合作用的藻类、苔藓和真菌构成的一层贴地覆盖物的影响，当时的地球正在发生"绿化"。

And nutrition at some stage may influence performance of sows of this stage,next stage and the whole reproductive cycle.

近年来，随着集约化生产的发展，高产仔母猪的营养需要和饲养管理已成为动物营养研究的新热点，有必要对其进行深入研究。1不同阶段妊娠母猪的饲喂母猪的繁殖性能与繁殖周期的各阶段营养密切相关，某一阶段的营养会影响此阶段、后一阶段乃至全程的生产性能(Johnston和Trottier，1999a)。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了