砷

A 2.6 GHz highly linear low-noise amplifier is designed and implemented in hybrid microwave integrated circuit using GaAs pseudomorphic high electron mobility transistor for WiMAX applications.

本论文采用砷化镓拟态高电子移动率电晶体研制应用於全球互通微波存取系统之2.6 GHz高线性度低杂讯放大器混合式微波积体电路。

A novel lightly-doped channel approach for linearity improvement of InGaP/InGaAs pseudomorphic high-electron-mobility transistor device was presented. Light doping in the channel region of the conventional δ-doped InGaP/InGaAs PHEMT was adopted to provide a uniform and symmetric electron distribution in the channel region to achieve flat extrinsic transconductance distribution under different gate bias conditions.

本次实验在传统矽平面掺杂元件结构的通道区域中加入微量的杂质浓度掺杂，使得电子在元件通道层中的分布更为均匀及对称，以期望在不同的闸极偏压条件下得到较为平坦的转导值分布曲线，改善磷化铟镓/砷化铟镓假晶式高电子迁移率电晶体的线性度表现。

In this thesis, the linear power amplifiers used for wireless LAN 802.11a standard are designed and implemented by using the discrete GaAs pseudomorphic high electron mobility transistors and InGaP/GaAs heterojunction bipolar transistors supported by Global Communication Tech.

中文摘要本论文使用分立式砷化镓pHEMT 及GCTC InGaP/GaAs HBT 制程设计应用於IEEE 802.11a 无线区域网路之线性化微波功率放大器。

By imaging-PAM, Photosynthetic performance of Pteris vittata was studied under Arsenic stress.

利用荧光成像技术研究了营养液培养条件下砷胁迫对蜈蚣草光合作用的影响。

Factors influencing arsenic accumulation by Pteris vittata: a comparative field study at two sites.

土壤中的砷及其生物有效性。地球科学进展， 2006， 21(6)625-632韦朝阳，陈同斌。

It was found that accession C108 had the highest As accumulation in shoot, being significantly higher than all other accessions. There was a significant difference among the accessions of Pteris vittata in both transporting factor and biological factor.

kg^(-1)基因型C108地上部积累砷最多，显著大于其它蜈蚣草基因型；研究还发现，蜈蚣草基因型间的转运系数和生物富集系数也存在显著差异。

The test of arsenic 、 burning residua 、 oxide are items of formal tests.

注： 1、砷、灼烧残渣、氧化物的测定为形式检验项目。

Rorippa globosa has been identified as a new Cd-hyperaccumulating plant species.

采用室外盆栽模拟方法，比较和分析了镉-砷复合污染处理对球果蔊菜(Rorippa globosa，十字花科焊菜属，1种从农田杂草中新发现的镉超富集植物)的生长及其对Cd、As吸收和积累特征的影响。

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Pretreatment ; Sulphatization ; Arsenic removal ; Reverse flotation

预处理；硫酸化；除砷；反浮选

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。