四线的

It should be noted that while older sources attribute the development of the stall to Guido, some modem scholars suggest that he acted more as a codifier of a system that was already in development.

需要说明的是，虽然史料表明四线谱谱法的发明归功于规多，可是一些当代学者却认为他只是将已经得以发展的四线记谱法进行编纂。

When the drawing board rotates it makes direct contact with the earth itself, but paper can only contact with the earth loosely through the drawing board. The seismoscope works according to this principle.

四线摆在运动时画笔直接与地球本身相连，而纸只是通过四根摆线松散的与地球相连，地震仪就是用这种原理工作的。

So compensating of nought line current is very important, that needs the Trinomial Four Lines pattern static Var Generator. The applied theory was brought forward two or three tens years ago, but domestic Trinomial Four Lines pattern Static Var Generator has not matured yet.

三相四线制静止无功发生器所用到的电流坐标变换理论虽然提出已有二三十年的时间了，但至今国内三相四线制静止无功发生器产的产品还不是很成熟。

During the ESR study of the effects of oxLDL on the ESR signal intensity of hydroxyl radicals in collagen (2 μg/ml)-activated platelets, we found that incubation of human platelets with collagen produced a typical four-line hydroxyl radical signal and a long-lived g = 2.005 radical detectable by spin trapper 5,5-dimethyl-1 pyrroline N-oxide.

在研究oxLDL降低由collagen 〈2 μg/ml〉刺激血小板产生的氢氧自由基〈OH●〉的ESR讯号强度的同时，我们发现以DMPO当自由基捕捉剂，collagen除了刺激血小板产生一个四线的典型氢氧自由基之外，还产生一个长半衰期 g = 2.005的自由基。

A multiplayer chip LC resonator was fabricated using planar inductor and parallel plate capacitor. Because lumped inductor has small Q value and there is stray parameter effect in high permittivity substrate, the Q value of chip LC resonator is not high. Resonators based on λ/4 stripline with end short circuited were designed and fabricated. Input and output pads, coupled to the stripline using gap-coupling capacitor, are in the same layer with the center conductive strip. This new structure is very convenient for manufacturing in comparison with the conventional structure.

采用间隙电容耦合结构实现的谐振频率为1.8GHz四分之一波长终端短路带状线单端口谐振器的Q值最大值为225，谐振频率为1GHz双端口谐振器的Q值为83，谐振频率和Q值与耦合间隙、带状线的厚度和耦合引线长度有关；二分之一波长带状线谐振器的Q值和四分之一波长相比较尺寸较大，由于导电带较长，造成金属的损耗增加，从而导致谐振器的Q值较低；带状线结构的谐振器频率调节困难，本文提出了改变接地端的宽度实现谐振频率的微调方法，可实现频率调节量约1.5%。

The results showed that: at metaphase I, the homoeologous chromosome pairing among different F1 hybrids ranged from 2.0 to 11.4 bi-valents formed by homoeologous chromosomes per pollen mother cell, and very few multivalents, and even very few bivalents were formed by two chromosomes within one genome rather than homoeologous chromosomes in some PMCs; at anaphase I, all biva-lents were disjoined and most univalents were divided.

结果表明在中期I阶段，这些杂种一代的近缘染色体联会变化很大，每个花粉母细胞中二价体形成的数目从平均2个到11.4个不等，甚至在某些花粉母细胞中，还发现极少的多价体和非部分同源染色体所形成的单基因组内二价体；在后期I时，所有的二价体分离，同时多数单价体也分离，分离的二价体和分离的单价体都移向两极，从而形成两组染色体；因为这时完整花粉母细胞中分离的二价体在两组染色体中总是对应出现，从而根据半二价体上染色体重组的位置可以分析在二价体的四分体时期发生在非姊妹染色体之间的多种染色体交换类型，如单交换、三线双交换、四线双交换、四线三交换和四线多交换。

This four-line signal slowly disappeared leading to the sequential generation of the g = 2.005 doublet signal with a maximum at 5 min.

此一四线的氢氧自由基慢慢消失后接著g = 2.005的自由基才生成，并在5分钟时达到最大讯号强度。

In this paper, the basic principle of the conventional slip energy recovery induction motor drive is discussed. Two kinds of slip energy recovery induction motor driving systems with high factors are discussed, and the performance analysis of these methods is compared. On the basis of above, a new type of three-phase and four-line slip energy recovering drive is proposed.

本文首先从普通串调原理入手，简要分析了影响串调系统功率因数的主要因素；在对三相四线双晶闸管串级调速、新型GTO串级调速等几种高功率方案进行分析与比较的基础上，提出了一种新型三相四线制双IGBT串级调速控制方案。

The one-cycle control equation and control circuit in three-phase bridge is similar to the three-phase three-wire system,the control equation and control circuit in N-phase half-bridge is mainly set up through analysis to the circuit.

有源电力滤波器是一种可动态地补偿谐波和无功电流的电力电子装置，四桥臂三相四线制APF可用于三相四线系统的谐波和无功电流的补偿。

In this work, the N〓-broaden halfwidths of the pure rotation and v〓 band of water vapor have been calculated by using QFT theory, which involves the three intermolecular interactions: short range, dipole-quadrupole, and quadrupole-quadrupole (denoted as QFT〓).

本文首先利用考虑短程强相互作用势、电四极矩〓-电四极矩〓和电偶极矩〓-电四极矩〓相互作用的QFT方法，计算了水汽分子纯转带和V〓振动带谱线的氮分子碰撞加宽线宽，以及V〓振动带谱线线宽的温度依赖关系。

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。