方波

We studied the leaching behavior of paraquat in soils with a very sensitive electroanalytic technique, i.e., square-wave voltammetry in couple with screen-printed carbon electrode.

本论文以电化学分析技术方波伏安法配合新发展的网版印刷碳电极，探讨对巴拉刈侦测上的灵敏性与其在土壤中的淋洗试验。

The cleavation rates and blastocyst development rates of cloned embryos were used to assess the efficiency of different operational procedure. Finally, the best combination of operational procedure, that the spindle-viewer system was used for oocytes enucleating, and donor cell was electrofused into ooplasm by electrical pulse (1.9 kV/cm, 10 ms, two) to reconstruct bovine cloned embryos.

以核移植胚胎的卵裂率、囊胚发育率作为检测指标，对不同的方法所获得的克隆胚胎的卵分裂率与囊胚发育率进行比较，最后筛选获得1个优化的牛体细胞核移植操作程序，即采用Spindle view系统对牛卵母细胞进行去核操作，将供核体细胞注射到卵周隙，然后通过电融合法将供体核引入去核卵细胞质(电融合参数为1.9 kV/cm，脉冲时程10 ms，方波2次间隔2 s)。

So in the solution studied the HSI mode could be used in pulsed current cathodic protetion system.

因此，在所研究的介质中高硅铸铁阳极可以用于方波脉冲电流阴极保护。

The results showed that the CV performance of PbO〓/PbSO〓 and PbSO〓/Pb powder microelectrode transformed from PbCO〓 under the optimize condition (the positive electrode was activated by asymmetric CV and asymmetric square wave current ways and the negative electrode using asymmetric CV) were better. Their electrode performances were as good as those made from leady oxide product by ball mill under the same conditions.

结果表明，将PbCO〓先制成粉末微电极，在30℃ 1.0mol/L H〓SO4〓溶液中经过化学转化为硫酸铅粉末微电极，以不对称信号活化(对PbO〓/PbSO〓电极，采用不对称循环伏安和不对称方波电流两种方法；对PbSO〓/Pb电极，采用不对称循环伏安法)得到电极的性能最好，正极活性物质的利用率高达89％，负极的达95％。

2 prelingual and 2 postlingual deaf patients were tested with promontory stimulation for electric hearing threshold, maximum comfortable level and gap detection.Pre and postoperative speech performance were evaluated with semi-quantitative method designed by the author.

选语前及语后聋患者各2例，测试每秒50、100及200次脉冲率方波的电听觉阈值、最大舒适水平及间隔辨别力，4例患者均植入Nucleus22导人工耳蜗装置，术前及术后言语康复训练后以半定量方法进行言语可懂度主观评价。

The just working frequency was obtained by calculation. By transient dynamics analysis applying piezoelectric coupling theory, the transient dynamics properties have been discussed. The analysis result provided a design reference on this kind of valveless piezoelectric pumps that use Cymbal actuators.

通过模态分析得到了Cymbal振子的前5阶固有频率和振型，选出其中最符合工作要求的频率和振型；通过瞬态分析，结合压电耦合分析，得到了振子在方波电压作用下的瞬态动力学特性。

Experimental results showed that the presence of chloride ion would effectively improve the deposition of metal, and largely increase the square wave anodic stropping peak height of metal depositing.

实验结果显示，分析溶液中含有氯离子可有效地改善金属铋、铅和镉在电极表面的沉积，大幅度地提高沉积金属的方波阳极溶出峰的峰高。

This algorithm is based on Ref[1,2] and perfectly improves the method for choosing forgetting factor, and in the algorithm the auto-regulation factor is introduced so as to cope with parameter estimation of fast time varying systems such as missile control system, etc., Digital simulation results show that this algorithm is satisfactory for identifying the parameters which change in the form of some typical functions (e.g., exponential, slide, step, sine, square or their combination).

这种方法主要是在文献 [1，2]的基础上改进了遗忘因子的选取方法，引入了自动调整遗忘因子，以适应导弹控制系统等快速时变系统的参数估计要求。数字仿真结果表明，这种辨识方法对于诸如参数的指数变化、斜坡变化、阶跃变化、正弦变化、方波变化以及由这些变化形式构成的混合变化，都有比较好的辨识效果。

With a peak-peak of rectangular asymmetric waveform voltage up to 1 600 V, a frequency of 195.8 kHz, a duty cycle of 30% and a compenstaion voltage of-8.63 V, the acetone displacement is compensated and the sensor ability to separate ions is demonstrated by an experiment using the planar copper drift tube.

当方波非对称射频电压峰峰值为1 600 V，频率为195.8 kHz，占空比为30%，补偿电压为-8.63 V时，采用平板铜块迁移区实现了丙酮离子的位移补偿，实验结果验证了传感器的性能。

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。

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。