单级的

The text analyses GPS observation model, the characteristic of kinds of errors fountain and the adopting measures in the observation, and processes the thorough research to Bernese GPS Software Ms-Windows Version 4.2. It makes the most stable satellites as the main error. The differential way adopts non-differential way and double differential way. The positioning precision of the single point is decimeter level. RMS is within 0.01~0.02; If the ambiguity right and without week skip, the observation datum of a EPOCH-BY-EPOCH can make the short base line（S0km）positioning precision reach centimeter level.

本文分析了GPS的观测模型、观测量中各种误差源的特点及应采取的措施，并对Bernese GPS Software Ms-Windows Version 4.2 软件进行了深入的研究，它是以最稳定的卫星作为主差，采用非差和双差两种差分方法，单点定位精度在分米级，RMS能在0.01~0.02以内；在模糊度已求解正确条件下，若没有周跳，一个历元的观测数据就可以使短基线（S0km）定位精度达到厘米级。

To cater for the various wire is particularly applicable to X42-X70 grade pipeline steel monofilament fast and multi-wire welding.

配合各种焊丝特别适用于X42-X70级管线钢的快速单丝及多丝焊接。

7 To 3.3 V operating supply voltage 44.1 kHz sampling frequency 16.9344 MHz (384fs) system clock Built-in crystal oscillator circuit 16-bit, MSB rst, rear-packed serial data input format ( 64 fs bit clock) 8-times oversampling digital lter · 32 dB stopband attenuation ·+0.05 to -0.05 dB passband ripple Deemphasis lter operation · 36 dB stopband attenuation ·-0.09 to +0.23 dB deviation from ideal deem- phasis lter characteristics Attenuator · 7-bit attenuator (128 steps) set by microcontrol- ler Soft mute function set by parallel setting ·(approximately 1024/fs total muting time) Mono setting · Left or right channel mono selectable by micro- controller Built-in innity-zero detection circuit , two-channel D/A converter · 3rd-order noise shaper · 32fs oversampling Built-in 3rd-order post-converter low-pass lters 24-pin VSOP package Molybdenum-gate CMOS process

2.7至3.3 V工作电源电压为44.1千赫的采样频率16.9344兆赫（384fs）系统时钟内置晶体振荡器电路的16位，MSB在前，后包装的串行数据输入格式（64飞秒位时钟）8倍超采样数字滤波器·32分贝的阻带衰减·+0.05至-0.05分贝通带纹波去加重滤波器的运作·36 dB抑制频宽衰减·-0.09到0.23 dB的偏差认为不理想，症状困扰评估滤波特性衰减器·7位衰减器（128级）集由单片机在-莱尔软静音功能的平行设置·（共约1024/fs静音时间）单声道设置·左或右声道单声道微控制器可选的内置的无限零检测电路Δ，两通道的D / A转换器·第三阶噪声整形·32fs过采样内置三阶后转换器的低通滤波器24引脚VSOP封装钼栅CMOS工艺

Sims and Saleh performed pin site care daily beginning 48 hours after the operation. In their study, they applied Orthox monolateral xators (Orthox Srl, Bussolengo–Verona, Italy)(58.4%), circular xators (19.7%), and the Shefeld Hybrid System (21.9%). Massage was used to release skin adhered to the pin. A cotton swab with normal saline or cooled boiled water was used to clean the pin site. Another cotton swab was then used to dry the pin site. Dressings were only applied if there was any exudate. Bathing with the leg submerged in water was discouraged. They found that 29% of the xators had noinfection (grade 0) according to the grading system of Saleh and Scott (Table 5). The remaining 71% of xators had an infection of one or more different grades. There were no grade 6 infections. They concluded that xators located on the femurhad the highest infection rate and that incidence of infection was 2.5 times greater for femoral xators in which corrections were performed (62.3%) than in those without corrections (24.5%). These observations, however, were based on half-pin care. We did not use half-pins or Schanz screws in any of our treatment groups.

Sims and Saleh在手术后48小时开始进行没人针孔护理，在他们的研究中，他们应用Orthox单臂外固定架(Orthox Srl， Bussolengo–Verona， Italy)（58.4%），环形外固定架（19.7%），Shefeld组合式外固定架（21.9%），按摩放松附着于钢针上的皮肤，蘸有生理盐水或凉开水的棉拭子用于清理针孔，另外一个棉拭子用于蘸干针孔，只有局部出现渗出是才应用敷料，阻止患者进行将带有外固定架的肢体浸入水中的洗浴方式，他们按照Saleh and Scott的标准发现29%的外固定架没有感染（0级），剩余71%外固定架有1个或者多个级别的感染，他们没有6级感染，他们得出结论：位于股骨的外固定架有最高的感染几率，而且实施矫形患者的感染发生率（62.3%）是不进行矫形患者感染发生率（24.5%）的2.5倍，但是，这些观察是基于半钉护理，在我们的任何一个治疗组中都没有应用半钉和Schanz螺钉。

The solvable Lie algebra is corresponding to a cascade decomposition of the system and the semisimple Lie algebra is corresponding to a qasi-parallel decomposition such that the system has a parallel form of a cascade decomposition and a qasi-parallel decomposition.

任一李代数都可分解为一可解李代数与一半单李代数的半直和，可解李代数对应于系统的级联分解，半单李代数对应的是系统的准平行分解，将二者合并起来，就得到一般李群下的非线性系统的结构分解，这是一级联形式与一准平行形式的并联形式分解。

To eliminate common-mode voltage of cascaded multi-level inverter, three kinds of phase-difference SVM based on left and right bridge vectors are proposed firstly. From these three modulations, equivalent SPWM components are deduced, and the unipolarity and bipolarity of output waveforms are analyzed. 2π/3 PD-SVM (phase-difference space vector modulation) is testified be unipolar.

为消除级联型多电平逆变器的输出共模电压，首先提出了基于左、右桥臂矢量的三类相差空间矢量调制(space vector modulation，SVM)技术，数学推导出三类调制技术的等效正弦脉宽调制(sine pulse width modulation，SPWM)的调制波，并分析了其各自相电压输出波形的单、双极性，证明2π/3相差SVM必为单极性调制。

The engine main circuit have to be gurranteed drawing the torque of electric motor and rotation speed wholly to do regulateing of independence ,But also possess extensive setting range SS7's mould electric locomotive adopts Quan Kongqiao and semi bridge accuseeing series connection to make up the monophase bridge style commutation electric circuit ,The coil power supply is encouraged against the stringtrain by the electric motor the drawing armature to 3 parallels operation ,Still there is an excitation commutation bridge ,He encourages the coil power supply with 3 electric motors drawing together to the series connection ,Moreover has one another accuses the regulating action .

机车主电路必须保证牵引电动机的转矩和转速都可作独立的调节，而且要有宽广的调节范围。SS7型电力机车采用一个全控桥和一个半控桥串联组成单相桥式整流电路，向3台并联工作的牵引电动机电枢与串励绕组供电，还有一个励磁整流桥，向串联在一起的3台牵引电动机他励绕组供电，并具有相控调节作用。可以实现机车无级调速和无级削磁。SS7型电力机车采用再生制动方式，再生制动时，牵引电动机作直流发电机工作，并且将电能馈送回接触网，此时电力机车相当于一个移动的发电站。

By cascading a delay interferometer as a comb filter with a tunable bandpass filter,and employing a saturable absorber formed by a unpumped polarization-maintaining EDF to select the single-longitudinal-mode of the laser, a stable wavelength-tunabledual-wavelength single-longitudinal-mode fiber laser is demonstrated.

4将梳状滤波的延迟干涉仪与可调带通滤波器进行级联，用未泵浦的保偏掺铒光纤饱和吸收体进行单纵模滤波，获得了波长可调的双波长单纵模掺铒光纤环形激光器。

The detection capability of single buoy is limited. To improve detection performance, we studied the detection-level fusion of several buoys based on the position and information characteristics of several airdropped buoys. On the basis of the analysis to distributed detection fusion theory, we studied the structure, rule and algorithm of the buoy signal detection-level fusion based on distributed detection.

针对单枚浮标对目标检测能力有限的问题，为了提高对目标的检测性能，根据多枚空投浮标的位置和信息特点，对多枚浮标的检测级融合进行了研究；在对分布式检测融合理论进行研究的基础上，研究了基于分布式检测的浮标信号检测级融合体系结构、融合规则、融合算法等。

First, the conception of wet compression is defined. A calculation method of moist air and wet gas thermodynamics properties is set up, which treat them as real gas and can give out the results of any water-air/gas ratio. Second, the thesis build the simulation model of water injection between compressor stages of a single shaft gas turbine, based on which the stable analysis is processed and the characteristics of key performance parameters are given out, such as the variation of air flow, pressure ratio, turbine inlet temperature with the water quantities. Results showed that enhancement of power output is outstanding.

文中定义了湿压缩概念，研究适用于计算机计算的湿空气，湿燃气等实际气体的热物性计算方法，利用此法可较准确地计算任意水气比下湿空气，湿燃气的各热物性参数，建立并推导单轴燃气轮机级间喷水热力循环的数学模型，用此模型进行稳态循环分析，并得出级间喷水时燃气轮机各主要性能参数的变化规律，如随喷水量变化，空气流量、压比、燃气初温等的变化规律。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。