首先

基本解释 (translations)

first  ·  firstly  ·  foremost  ·  primarily  ·  uppermost  ·  imprimis

词组短语

above all · at first · begin with · by preference · first and foremost · first of all · for one thing · in the first instance · in the first place · to begin with · to start with

与首先相关的网络例句 [注：此内容来源于网络，仅供参考]

In this paper, firstly, the embeddability of near-triangular graphs on the orientable surface is studied. By using Petersen's Theorem about 1-factor, we first prove that for a near-triangulation on the orientable surface, its geometry dual graph has a 1-factor; then after a procedure of operation leaded by the 1-factor, we show that if a graph G triangulates some orientable surface S_g, then G has a near-triangular embedding in S_h for h = g,g + 1,...,β(G/2」, where β is the Betti number of G. Hence we obtain a conclusion: A near-triangulation of the orientable surface is upper-embeddable. As a generalization, a class of near-quadrangulation is studied, and similar results are obtained.

本文首先研究了近三角剖分图的可定向曲面嵌入性质，通过运用Petersen关于1-因子的定理，首先证明了对于可定向曲面上的三角剖分图，其几何对偶图具有1-因子；然后在1-因子的导向下，通过做一系列增加亏格的手术，证明了如果一个图G三角剖分可定向曲面S_g，那么G可以近三角剖分可定向曲面S_h，这里h=g，g+1，…，「β(G／2」，β是指图G的Betti数，从而得出推论：可定向曲面上的三角剖分图是上可嵌入的，作为推广，又研究了一类近四角剖分图的可定向曲面嵌入性质，并得到类似的结论。

So supported by well core experimentation, the *** analyzed the logging response feature and mechanism of thin bed, and point out that many factors can affect the logging response of the reservoir, the main factor which mostly influence the logging response is the thickness of thin layer, and the content of carbonite have a great influence on the response of 3-porosity logging.we make use of core experimentation, combined with logging material, firstly the *** do the lithology correction and thinckness correction for resistivity curves, and based on the content of mud that derived from the core experimentation, the *** present the thickness correction model of gamma-ray logging and self-potential logging, and choose the appropriate ways to compute the carbonate content and using the value of mixed frame in order to correct the influence from the carbonite, based on this, the *** gives a effective methods to correct the thickness influence for 3-porosity logging.

本文首先以岩心实验结果为依据，对研究区薄层的测井响应特征和机理进行了分析，指出多种地质因素影响着储层的测井响应特征，而层厚是影响测井响应最主要的因素，且碳酸岩含量对三孔隙度测井的影响很大。利用岩心实验分析资料，结合测井资料，首先对电阻率测井曲线进行了岩性的校正和层厚校正；利用岩心分析泥质含量，研究了自然伽马和自然电位的层厚校正方法，并建立了层厚校正模型；在有效计算储层碳酸岩含量和混合骨架参数值的基础上，研究了针对碳酸岩含量对测井曲线的影响进行校正的方法，进而提出了一套对三孔隙度测井曲线的薄层层厚影响的校正模型。

The main job and contribution of this paper are as follows:Based on narrowband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, compute the cross-correlation function of FH signals from multichannels, then we get the cross power spectral density matrixCSDM Secondly, select the hops of FH signals from the CSDM via processing and analyzing the CSDM, meanwhile reduce the influence coming from noise, fixed frequency signal and other interferences; Lastly, estimating the DOA of every hop and according to the DOA, we can separate the hops, get the number of FH signals and their parameters. Propose a new method for designing the threshold in FH signal detection. This method makes it easy to get the threshold by theoretic computing and it can extremely reduce the interference of non-FH signals.Based on broadband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, get the DOA of the signals by wideband spatial spectrum estimation; secondly, separate the signals by spatial filtering using wideband beamformer; Lastly, we propose two methods for FH signal blind detection and blind parameter estimation, one is for several constant hop-rate FH signals whose dwell-time are different and another is for a single FH signal whose hop-rate is alterable.By employing spatial interpolation in broadband signal beamforming, it can reduce the number of antenna elements and corresponding RF modules, A/D converters, etc. It can also eliminate the mutual coupling between antenna elements while getting the narrower main beamwidth and lower sidelobe level.

本文的主要研究工作和贡献如下：●提出了一种基于窄带处理的FH信号盲检测和参数盲估计的实现方法，即首先求出多路信号之间的互相关，进而得到互功率谱密度矩阵，然后通过对CSDM进行对折处理来抑制噪声、定频信号及其他干扰的影响，并将所有属于FH信号的hop(每一跳的驻留时间在时频图上持续的线段)从CSDM中筛选出来，最后用阵列信号处理中的到达方向估计理论在频域中估计出各个hop的方向参数，利用方位信息完成FH信号分离并得到FH信号的数目及其各自的参数集；●提出了一种确定FH信号检测门限的策略，该策略不仅使得检测门限能够通过理论计算得到，而且还显著地抑制了非跳频信号的干扰，从而能有效地检测出FH信号；●提出了一种基于宽带处理的短波FH信号盲检测和参数盲估计的实现方法，即首先利用宽带空间谱测向技术得到接收信号的DOA，然后采用宽带波束形成技术对特定方向进行空间滤波，实现多个信号的分离，最后分别提出了两种FH信号的盲检测和参数盲估计方法，第一种方法适用于空间某个特定方向上存在着几个驻留时间不同的恒跳速FH信号和其他干扰信号的混合信号，第二种方法适用于空间某个特定方向上仅含一个可变跳速的FH信号和噪声的混合信号；●将空间插值的概念和宽带波束形成技术结合起来，提出了一种基于频域处理的宽带恒定束宽的波束形成方法。

Study on application and simulation of Kalman filter technology in SINS Because Kalman filter some merits, such as provided a fast and accurate method for SINS, adopting it to do initial alignment in this paper. The Kalman filter theory is introduced and the dynamic error vector equation of the initial alignment is derived at the first. Using velocity error as exterior value of observation, maneuverable characteristic that is influenced with system's observability and its degree is studied at length by do amount of simulations and experiences.

首先介绍了卡尔曼滤波理论及相关技术，建立了系统卡尔曼滤波的状态方程和观测方程；首先采用速度误差作为观测值，详尽的研究了系统机动特性对可观测性和可观测度的影响，并做了大量仿真实验：通过对滤波原理的分析研究了影响的原因；分别选用加速度计输出误差和转台输出姿态角误差作为外部观测值，推导建立它们的观测模型，并通过仿真证明了分析结论的正确性。

You must escap Frostmourn s hold, First.

得首先摆脱霜之哀伤的控制，首先。

You have to clear that if your French government really want to smooth away the unpleasantness between Chinese and French people, you must realize how serious the mistake made by you was, keep them in mind, and make sure all of those fucking things will not happen again. This is what you should do but not imagine letting them fade from our memory.

您首先应该清楚，对你们法国政府来说，要想这个横阻在消除两国人民之间的芥蒂，你们必须首先深刻认识到这个错误有多严重，并时刻谨记于心决不能让此类事件再次发生，这才是你们该做的事，而不是妄图粉饰太平淡忘所有发生过的不愉快。

She spake, and at her words the hellish Pest [ 735 ] Forbore, then these to her Satan return'd: V1:她说罢,那地狱的瘟神竟然停手了;于是那撒旦回答说: V2:她说罢,那地狱的瘟神就罢手;于是那撒但回答说: So strange thy outcry, and thy words so strange Thou interposest, that my sudden hand Prevented spares to tell thee yet by deeds What it intends; till first I know of thee, [ 740 ] What thing thou art, thus double-form'd, and why In this infernal Vaile first met thou call'st Me Father, and that Fantasm call'st my Son?

V1："你的叫喊声和阻止的话都很奇怪，竟使这敏捷的手停住，无法满足我的欲望，给你看清；我首先得知道你这是什么玩意？你这二重的形像，为什么在这地狱的幽谷中，同我初次相见就管我叫父亲，管那幻影叫做我的儿子，我可不认识你们，从来没有见过像你和他这么奇丑可憎的怪物。"地狱大门的女司阍这样回答道： V2：你的叫喊声真古怪，你阻止的话也真稀奇，竟使这敏捷的手停住，不能逞我所欲，给你看清；我首先得知道你这是什么玩意？

ICF's reputation spread with a succession of "firsts" in captive breeding programs:(1) first red-crowned crane was hatched in the western hemisphere in 1975;(2) first hooded crane was hatched in captivity in 1976;(3) Brolgas was hatched for first time in North America in 1979;(4) first captive hatching of Siberian crane was made in 1981;(5) ICF pioneered "isolation rearing" efforts to release captive cranes in the wild from 1984-85;(6) ICF hatched its first wattled crane in 1993, making it the first institution to have bred all fifteen species of cranes successfully.

首先在鹤类的饲养繁殖方面做出了巨大贡献，其中下面几个方面创造了前所未有的功绩：（1）在1975年，在西半球首先孵化了丹顶鹤；（2）在1976年，首先在人工饲养条件下孵化出了白头鹤；（3）在1979年，在北美首先孵化出澳洲鹤；（4）在1981年，首先孵化出了白鹤；（5）在1984年~1986年，首先使用"隔离饲养"方法把人工饲养的鹤释放野外；（6）在1993年， ICF 第一次自己孵化出了肉垂鹤，从而成为首家能繁殖所有15种鹤的机构。

But if a man has first conceived as good the things which appear to the many to be good, he will listen and readily receive as very applicable that which was said by the comic writer. Thus even the many perceive the difference. For were it not so, this saying would not offend and would not be rejected in the first case, while we receive it when it is said of wealth, and of the means which further luxury and fame, as said fitly and wittily.

但如果一个人首先接受的是对大部分人来说是好的东西，那他将会去倾听并准备接受那些喜剧作家的话，认为很适合于他，大部分人接受了这些观念，因为如果不是这样，上面的话就不会被违背，不会首先就被人们拒绝，而如果我们首先谈的是财富，是获得更多奢侈和浮名的方式，并且谈的方式明智而得体，我们就会接受。

ICF's reputation spread with a succession of "firsts" in captive breeding programs:(1) first red-crowned crane was hatched in the western hemisphere in 1975;(2) first hooded crane was hatched in captivity in 1976;(3) Brolgas was hatched for first time in North America in 1979;(4) first captive hatching of Siberian crane was made in 1981;(5) ICF pioneered "isolation rearing" efforts to release captive cranes in the wild from 1984-85;(6) ICF hatched its first wattled crane in 1993, making it the first institution to have bred all fifteen species of cranes successfully.

首先在鹤类的饲养繁殖方面做出了巨大贡献，其中下面几个方面创造了前所未有的功绩：（1）在1975年，在西半球首先孵化了丹顶鹤；（2）在1976年，首先在人工饲养条件下孵化出了白头鹤；（3）在1979年，在北美首先孵化出澳洲鹤；（4）在1981年，首先孵化出了白鹤；（5）在1984年~1986年，首先使用&隔离饲养&方法把人工饲养的鹤释放野外；（6）在1993年， ICF 第一次自己孵化出了肉垂鹤，从而成为首家能繁殖所有15种鹤的机构。

与首先相关的网络解释 [注：此内容来源于网络，仅供参考]

To begin with：首先

to be frank 说句实话 | to begin with 首先 | to start with首先

first and foremost：首要地,首先

fire up (突然)生气,勃然大怒 | first and foremost 首要地,首先 | first of all 首先,第一

first of all：首先,第一

first and foremost 首要地,首先 | first of all 首先,第一 | first or last (古)迟早,早晚

for one thing：首先;一则(用以引出某事的理由)

first of all首先,第一 | for one thing首先;一则(用以引出某事的理由) | in the first place最初;首先

In the first instance：首先

in the final analysis 归根到底 | in the first instance 首先 | in the first place 首先

Brand: Outset：品牌:首先

Brand: Outset 品牌:首先 | Label: Outset 标签:首先 | Manufacturer: Outset 制造商:首先

to start with：首先

to begin with 首先 | to start with首先 | to be more exact更确切地说

think in terms of sb：首先考虑(做)某事;认为(做)某事是最首要的

903think big野心勃勃,好高鹜远 | 904think in terms of sb.首先考虑(做)某事;认为(做)某事是最首要的 | 905think in terms of sth.首先考虑(做)某事;认为(做)某事是最首要的

think in terms of sth：首先考虑(做)某事;认为(做)某事是最首要的

904think in terms of sb.首先考虑(做)某事;认为(做)某事是最首要的 | 905think in terms of sth.首先考虑(做)某事;认为(做)某事是最首要的 | 906threatenvi. 构成威胁; vt. 威胁

in the first place; first and fore most; at the beginning, initially：首先;第一

A thousand li journey starts with the first step. 千... | in the first place; first and fore most; at the beginning, initially首先;第一 | To start with, we have the correct leadership of the Party. 首先...