1)  palisade parenchyma
柱状薄壁组织
2)  palisade tissue
柱状薄壁组织
3)  cylindrical V/AC
柱状V/AC
1.
The heat regeneration of cylindrical V/AC catalyst for adsorbing SO2 and NH3 regeneration were studied by an atmospheric fixed-bed reactor.
使用常压固定床反应器,考察了吸附SO2的柱状V/AC催化剂的热再生和NH3再生行为。
4)  columnar grain
柱状晶
1.
Steel Billets without Columnar Grain in Continuous Casting-Semisolid Continuous Casting;
无柱状晶钢坯的连铸技术——半固态连铸
2.
Directional recrystallization can be used to produce single crystals or columnar grain structure,which can show enhanced creep properties,improved low-cycle fatigue resistance and/or improve crack-stopping behavior.
用定向再结晶技术可以制备单晶或柱状晶结构。
3.
Cu-Al-Ni wires with columnar grain structure fab- ricated by heated mold continuous casting process were con- ducted bending fatigue and tensile fatigue tests to study the behavior of grain boundaries in fatigue process.
用热型连铸法制取具有柱状晶组织的Cu-Al-Ni合金丝,进行弯曲疲劳和拉伸疲劳试验,研究晶界在疲劳过程中的行为。
5)  unidirectional dendritic crystal
柱状组织
1.
Using appropriate process parameters, the Cu-Al-Ni shape memory alloy with good surface quality and unidirectional dendritic crystal was prepared by the self-made ohno continuous casting equipment.
在自制的水平热型连铸设备(OCC)上,采用一定的工艺参数,制备出表面呈镜面,内部组织沿轴向定向排列的柱状组织Cu-Al-Ni形状记忆合金。
6)  columnar mesophase
柱状相
1.
Discotic liquid crystals self-assemble to highly ordered hexagonal columnar mesophase (Colho) and exhibit anisotropic high charge carrier mobility, and can be used as organic opto-electronic materials.
采用分子间氢键锚定柱状相,获得介晶相温度范围宽、有序度高的苯并菲盘状液晶是本研究的目的。
2.
The results showed that these compounds exhibit high clearing points, stable columnar mesophases and wide mesophase ranges.
结果显示:此类化合物有高的清亮点,稳定的六方柱状相以及较宽的介晶相范围,且随着软链碳原子数的增加,化合物的熔点和清亮点均出现下降趋势,但六方柱状相的有序性却没有发生很明显的变化。
7)  Columnar crystal
柱状晶
1.
Distribution of the growth orientation of Ni-Ti alloy columnar crystal;
Ni-Ti合金中基体柱状晶的取向分布规律
2.
The results showed that pure copper plates of 25mm in width and 5mm in thickness with luminant surface and columnar crystals can be continuously and stably fabricated under the conditions of melting temperature 1160℃,drawing speed .
结果表明:当熔体温度1160℃、下拉速度70mm/min、冷却水量900L/h时,可以连续稳定成形宽25mm、厚5mm且表面光亮、具有连续柱状晶组织的纯铜板材,其抗拉强度为146MPa,屈服强度为33MPa,延伸率为54%,电导率为105。
3.
But for the copper formed of more thin wire, there are all columnar crystal a.
而多股细铜导线火烧和二次短路及过负荷产生的熔珠熔痕,其显微结构中均出现等轴晶和柱状晶及较小再结晶颗粒,与一次短路结构较难以区别,因此无法为火灾原因的鉴定提供依据。
8)  Columnar crystals
柱状晶
1.
Compact processing of containing CuAlNi alloy pipes with continuous columnar crystals;
连续柱状晶组织CuAlNi合金管材的短流程制备
2.
The results showed that the proper amount of additions of Na2O-MgO can obviously promote the formationβ-Al2O3columnar crystals,raise its aspect ratio,and increase the flexural strength and fracture toughness.
结果表明:在实验的添加剂量范围内,适量的添加剂能促使β苁-Al2O3柱状晶的形成,长径比增大,其强度和断裂韧性增加。
3.
The results show that when nucleation temperature is lower than the temperature of endothermic peak of DTA curve, the columnar crystals grow in unidirectional direction from border to inner of the sample.
结果表明 :核化温度低于差热分析 (DTA)曲线吸热峰温度时 ,样品边界存在明显的从表面向中部定向生长的柱状晶组织 ,而样品中部是方向各异的树枝晶形态。
9)  cylindrical gas column
柱状气柱
10)  rod-like grains
柱状晶
1.
Al_2O_3/Al ceramics with rod-like grains were prepared by precipitation method and pressureless sintering and using Al(NO_3)_3·9H_2O, ammonia and nanosize aluminum as raw materials.
以Al(NO3)3·9H2O、氨水和纳米铝粉为原料,采用液相沉淀包裹法和常压烧结制备出柱状晶结构Al2O3/Al陶瓷材料。
2.
SiC ceramics with rod-like grains were obtained by pressureless sintering of β-SiC powders with Y2O3and Al2O3 as additives.
实验采用β-SiC为起始原料,Y2O3、A12O3为烧结助剂,通过适当的烧结控制,获得了具有长柱状晶粒结构的α-SiC陶瓷,材料以液相烧结机制密化,在烧结过程中发生了与柱状晶形成有关的SiC晶粒3C→4H相变。
补充资料:AC-DC-AC-DC型开关稳压电路


AC-DC-AC-DC型开关稳压电路
AC-DC-AC-DC type switching voltage stabilizing circuits

  对小功率的AC一DC一AC一IK!型稳压电路,可省去图中的集成驱动器,由集成控制器直接驱动。AC一DC一AC一】兀型稳压电路组成的开关电源及模块,广泛应用于通信和其他电子设备中作为一次电源用。AC DC ACDCx一rlg伙019七Jo了1 wenyod旧z〕JLJAC一OC一AC一OC型开关稳压电路(AC一DC一AC一IX二type switehing voltage stabilizingcircuits)将交流电压通过整流滤波电路及DC一〔X)开关变换器,并借助反馈环节得到稳定直流输出电压的开关型稳压电路。其原理方框图如图所示。图中输人和输出端都加有噪声溥波器。电容滤波的全波整流电路中,开机时有一大的充电电流流过整流管。为了削弱该冲击电流,在AC一DC一AC一IX{型稳压电路中加人软起动电路。又因电容滤波的整流电路中电流失真很大,使功率因数很低。为了提高功率因数,通常采用功率因数校正技术。90年代以前,采用无源校正技术,只能对基波进行相移补偿或抑制某些指定的谐波。实际应用中,还受到体积、质量、价格等因素的限制。9。年代普遍采用高频有源功率因数校正技术。图中的有源功率因数校正电路实质上是一种升压式有源功率因数校正(b oost一PFC)电路(见DC一DC型开关稳压电路)。它可将稳压电路的输入电流波形变换为与输入电网电压同相位的正弦波,变换效率可大于98%。这样,可以降低线路损耗,节约能源,减小电网的谐波污染。┌───┐ ┌────┐┌─────────┐┌──┐│NF │ ┌───┐│ pFC ││ OC~O(: ││ 哪││,噪声│ │_整流 ││功率因数││ 变换器 ││噪声││健波 │ └───┘│ 校正 ││(含高频整流及滤波)││滤波││ │ │ │└─────────┘│ │└───┘ └────┘ └──┘ ┌─────┐ │ SS │ ┌─────┐ │软起动 │ │集成驱动器│ │ │ └─────┘ └─────┘ ┌─────┐ │集成控制器│ └─────┘ AC一1)C一AC一1)C型开关稳压电路原理方框图
  
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条