查询词典 square wave

Using of HCl solution substituting acetate buffer as analytical solution, not only would reproducibly renew the electrode surface with an electrochemical clear procedure, but also could eliminate effect of hydrolysis of bi species. At the same time, the square wave anodic stropping method of BiFEs could be extended to analyze sample containing chloride anion, such as sea water.

以稀HCl作为分析基础溶液替代传统的乙酸缓冲溶液，不仅可采用简单的电化学清洗方法高重现性地再生活化玻碳电极表面，并且，可消除金属离子的水解反应对检测结果产生的不利影响，同时可将铋膜电极SWAV检测方法拓展至分析检测海水等含氯离子样品。

A new electrochemical method was established to analyze lead in samples by voltammetry of square wave leaching after pre-treatment of microwave irradiating digestions and the optimum determination conditions were explored.

摘要利用微波消解样品，再以电化学方波溶出伏安法检测样品中铅的含量并确定了最佳测定条件。

Square-wave passive standby UPS based on MCU is presented. There are some functions of the system: realizing the uninterruptible power supply according to following the track of grid and changing grid and inverter in phase when grid is abnormal; advanced battery management; communication and supervision with PC. The principle of the system is analyzed.

研究了一种单片机控制的单相方波输出后备式UPS，该系统实现了在市电不同状态下，系统逆变输出与市电的同相切换，实现了对设备的不间断供电；实现了对蓄电池的智能管理；可以与 PC机进行通讯，便于用户监控等功能。

DG1000 series function / aleatoric and undee generator can offer 5MHz, have rise quickly edge and drop the square wave of the edge, and have the frequency of high accuracy, broadband belt measure a function.

DG1000系列函数/任意波形发生器能够供给5MHz、存在迅速回升沿和回升沿的方波，而且存在高精度、宽频带的频率测量性能。

This experiment was in a creative way to adopt the high pressure and square wave to drive the electric light Q-Switch, achieving dual-wavelength、dual-pulse Cr:LiSAF tuneable laser output.

为实现单光束、双波长、双脉冲Cr：LiSAF调Q激光输出，实验中创造性地采用高压方波驱动电光Q开关实现了双波长、双脉冲的Cr：LiSAF可调谐激光输出。

Tuneable ; dual-wavelength ; dual-pulse ; Cr:LiSAF ; high pressure and square wave

可调谐；双波长；双脉冲； Cr：LiSAF ；高压方波

In this study, in utero transfection plasmid DNA method was set up to embryonic mouse. The GFP expression vector pCAGGS-IRES-EGFP was microinjected into the lateral cerebral ventricle of E 14.5d mouse embryos through the uterine wall. Then, the 30 V square-wave pulse was delivered across the head for 5 times and interval 50m sec by electrodes in parallel with the median raphes.

本研究旨在通过子宫内电穿孔法，建立鼠胚大脑皮层体内基因转移体系：将带有绿色荧光蛋白的表达载体pCAGGS-IRES-EGFP显微注入胚胎期14.5 d的鼠胚侧脑室中，电极沿与脑中缝平行的方向夹持鼠脑，在电压30 V，脉冲时间50 ms，脉冲数5的条件下方波电击，将外源基因转移到室管膜层细胞。

AT89S52 high square wave output of the timing of the solenoid valve control procedures.

详细说明： AT89s52的定时输出高电平方波的电磁阀控制程序。

The square wave anodic stripping voltammetric methodology using a screen printed carbon electrode in situ plated in mercury was developed by the authors to determine lead in tea.

建立了同位镀汞法修饰的丝网印刷碳电极电化学方波溶出伏安法快速检测茶叶中的铅的方法。

The parameters of square-wave plating from cyanide silver bath are selected by Hull cell test, and the optimum pulse duration, duty ratio and average corrent are estimated through combined experiments.

于最佳控制条件下，从氰化镀银溶液中电沉积的镀层，就外观、微观形貌和抗硫能力而言，都优于从同一镀液中用直流电沉积的银层。

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。