查询词典 First Steps

And three main steps of all subspace algorithms are explored. First, using an LQ-decomposition, the projection of the row space of specific data Hankel matrices is calculated. Next, the SV-decomposition of the projection is calculated to directly lead to the observability matrices and a Kalman filter estimation of the state sequences. Last, the system matrices are extracted from the observability matrices and/or the estimated state sequences.

概括了子空间辨识算法的三个主要运算步骤：首先由LQ分解计算特定Hankel矩阵的行空间投影；再对该投影进行SVD，获取系统的可观测矩阵及状态序列的Kalman滤波器估计；最后由可观测矩阵和／或估计的状态序列确定系统矩阵。

The Mole had been working very hard all the morning, spring-cleaning his littleHome. First with brooms, then with dusters; then on ladders and steps andchairs, with a brush and a pail of whitewash; till he had dust in his throat andeyes, and splashes of whitewash all over his black fur, and an aching back and

整个上午，鼹鼠都在勤奋地干活，为他小小的家屋作春季大扫除，先用扫帚扫，再用掸子掸，然后登上梯子、椅子什么的，拿着刷子，提着灰浆桶，刷墙，直干到灰尘呛了嗓子，迷了眼，全身乌黑的毛皮溅满了白灰浆，腰也酸了，臂也痛了。

After years of work and strenuousness, Hanjinbai is now full fledged. We formed our distinctive business management model. We cherish first rate developmental concept, mature resource management system, pragmatic managerial style and effective work team. With all these advantages we developed with firm steps and high speed and became a bright star among Chinese private enterprises.

多年风雨历练，瀚金佰集团羽翼渐丰，形成了独具个性魅力的企业管理模式，将一流的发展理念、成熟的资源管理体系、务实的管理作风和高效的企业团队融于一身，企业拓展稳健、迅速，成为民营企业中一颗熠熠生辉的明珠。

Smothered by the indulgence of his rock star ranking, Jack White steps into the eccentricities of the supergroup, and at first glance, this seems to be a band where White's imposing presence could overshadow the rest.

2005年，四人组建了这个The Raconteurs，并且在四个人都有空的时候才能聚到一起写歌排练。在这个新组建的乐队里，Jack White和Brendan Benson均担任主唱、吉他和键盘，另两人Jack Lawrence负责贝斯，Patrick Keeler负责敲鼓。

It is in self-consciousness, in the Notion of Spirit, that consciousness first finds its turning-point, where it leaves behind it the colourful show of the sensuous here and now and the night like void of the supersensible beyond , and steps out into the spiritual daylight of the present .

意识在自我意识里，亦即在精神的概念里，才第一次找到它的转折点，到了这个阶段，它才从感性的此岸世界的无色缤纷的假象里并且从超感官的彼岸世界之空洞的黑夜里走出来，进入到现在世界的精神的光天化日。

First, two chiral glycerol derivatives were synthesized in twelve steps of reactions from natural tartaric acid.

据此，本论文确定ω-氨基溶血磷脂酸为和载体相连的LPA类似物，并尝试性地对其进行了合成。

It is shown that the rate process of thermolysis can be divided into two steps with the first step described by shrinking core model and the second step by one order reaction model.

研究证明热分解过程可分为两个阶段，前期可用缩芯模型描述，后期则以一级反应模型描述。

The responses properties of coupled vibrations for 120° and 180°asynchronous juxtaposition of 200MW turbine-generator set were analyzed. The results show that the responses properties of flexural and torsional vibrations caused by 120° asynchronous juxtaposition are similar to that of 180° asynchronous juxtaposition. When the fault happened, Former two steps inherence frequencies and whirl speed frequency of torsion are excited. And the first step inherence frequencies of flexural vibration are also excited besides whirl speed frequency. Transient electromagnetism moment peak, torsional and torsional moment responses caused by 180° asynchronous juxtaposition are lower than that of 120° asynchronous juxtaposition.

利用该方法，针对某200MW汽轮发电机组的120°和180°两种非同期并列情况，进行了机组弯扭耦合振动响应特性研究，分析表明：汽轮发电机组的120°和180°两种非同期并列情况下的弯振和扭振响应特性基本相似；非同期并列主要激发出工频和前两阶固有频率扭振，弯振除工频主分量外，第一阶固有频率也被激发出来；180°非同期并列时的暂态电磁力矩峰值比120°非同期并列时低，相应的扭振和扭矩响应也小于后者。

Based on the characteristics of railway vehicles, the crashworthy subway vehicle was designed. The design concept of crashworthy car-body was proposed and the energy-absorbing process of the head car impact was divided into four steps: the first step is the rubber buffer of the buffer equipment of vehicle coupler; the second is the buffer with collapsible tube; the third is the cut bolt of vehicle coupler; the fourth is the special energy-absorbing structures and the anti-climbers on the underframe of head car.

针对地铁车辆自身特点进行耐冲击地铁车辆吸能结构设计，提出了耐冲击地铁车辆设计理念，将该地铁头车在撞击过程中的能量吸收过程设计为4级：第1级为车钩缓冲装置缓冲器，第2级为缓冲装置中的压溃变形管，第3级为车钩剪切螺栓，第4级为位于头车前端底架的吸能结构和防爬器等可变形结构。

Fitted with artificial legs, he walked unsteadily at first, but his steps grew steady with practice.

装了假肢，他起初走路走不稳，但经过锻炼他的步子稳了。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。