At last , the core technology of compressing moving images is discussed - motive reward technique , and the compression of moving images is realized by using the method that the two wavelet transformations of two - dimensional still images and one - dimensional time - axis are combined together 最后，讨论了运动图像压缩核心技术? ?运动补偿技术，并用二维静止图像小波变换与一维时间轴上的小波变换相叠加的方法实现了对运动图像的压缩。
Based on the scalar diffraction theory and the boundary condition of rayleigh - sommerfeld , the accurate on - axis propagating wave function of plane wave diffracted by small circular band is obtained by solving the first integral of rayleigh - sommerfeld 摘要从标量衍射理论出发，采用瑞利索末菲衍射边界条件，通过求解第一类瑞利索末菲衍射积分得到平面波经圆环衍射后轴上的波函数，进而分析轴上的光强特性以及光强极值数量、位置和大小与衍射圆环内外孔径的关系。
The meaning of cqc ( t ) algorithm is the difference in time domain between the peak value location in time axis of input earthquake and model response of structure , which is called delay time . through the delay time calculating of a series of oscillators with different damp ratio and natural vibration frequency , it is found that it will bring biggish error if the cqc algorithm applied on the structure which has long period , and the time dependent cqc ( t ) algorithm could solve the problem easily Cqc ( t )方法的意义在于输入地震动峰值与结构模态响应峰值在时间轴上的时间差,我们称之为延迟时间,通过计算具有不同周期和阻尼比结构的延迟时间,发现对于自振周期比较长的结构, cqc方法会带来比较大的误差,而基于时程的cqc ( t )方法能够解决这个问题。
It is proved by experiment that the linear temperature distribution , which generates linear wavelength spread of the output beams from a ld bar , can be obtained by introducing a temperature gradient heat sink and the output beams can be focused into a relative small spot by using the czerny - turner beam combining system 本文探讨了利用温度控制波长的原理，提出了温度梯度热沉的初步设想，及耦合光学系统的设计。初步实验的结果证明利用czerny - turner光束耦合系统，可以改善慢轴上的光束质量，将光束聚焦到较小的尺度。
Regaining new stable equilibrium he rose uninjured though concussed by the impact , raised the latch of the area door by the exertion of force at its freely moving flange and by leverage of the first kind applied at its fulcrum gained retarded access to the kitchen through the subadjacent scullery , ignited a lucifer match by friction , set free inflammable coal gas by turning on the ventcock , lit a high flame which , by regulating , he reduced to quiescent candescence and lit finally a portable candle 他重新获得了稳定均衡，尽管因猛烈撞击而受震荡，却没有负外伤就站了起来。他使劲扳院门搭扣的那个活动金属片，凭着加在这一支轴上的初级杠杆的作用，把搭扣摘开，穿过紧挨着厨房地下的碗碟洗涤槽，绕道走进厨房。他擦着了一根安全火柴，转动煤气开关，放出可燃性的煤气。
This paper brings forward and proves a rapid interval test for resolving intersection tests between bounding volumes . it determine two bounding volume do not overlap by checking if one of their bound intervals on direction axis defined by the fix direction set does not overlap 文中提出并证明了一种快速区间测试法以解决两个固定方向凸包包围盒间的相交测试问题，通过查找两个包围盒在由固定方向集合所定义的方向轴上的范围区间是否存在不重叠的情况，来判断它们是否不相交。
The recursive criterion of transient current protection based on mallat wavelet transform is presented in order to meet the real - time demands . the reserch shows deficiency existed in the prevenient principle of transient current protection , so a new improved scheme of transient current protection is proposed . the characteristics of transient protection at different bus distribution capacitance is also analysed in this thesis . the study shows that operate of transient protection is correct when the bus distribution capacitance change . other conclusion include : the trip of transient protection must be locked when the power circuit breaker of transimission line operated , because the trip is incorrect at this time ; the features of transient current and it ' s energy is different between the fault and thunder over - voltage in transimission line , and them can be identified ; the ratio of high frequency component of current in serise capaciters compensation line , svc and hvdc system is far little than fault transient current , so all of them do not affect the working of trasient current protection 应用功率谱估计方法讨论了故障高频暂态噪声信号在频率轴上的分布情况，利用功率谱分析结果实现的非参数化系统辨识方法研究了母线分布电容对电流高频暂态信号的衰减特性。论文的后半部分(第五,六,七章)着重分析了现有基于故障电流的暂态保护原理和判据存在的问题，提出了新的实现方案，并讨论了暂态电流保护的运行性能。利用多分辨分析和小波分解快速算法构成的递推暂态保护判据，可以准确区分故障线路和非故障线路，实现超高速暂态电流保护，计算更为简单方便，计算速度更快。
