1) element substitution
元素的替代
1.
Three methods to make symbol design interesting were put forward,which are(1) enriching modeling imagination ability,(2) unique modeling creative method including positive and negative shape modeling ingenious utilization,and element substitution,and(3) the diverse modeling expression technique including the traditional Chinese painting .
其中重点在第3部分,提出了3个使标志设计具有趣味性的方法:(1)丰富的造型想象能力;(2)独特的造型创意方法包括正负形造型的巧妙运用、元素的替代;(3)多样的造型表现手法包括中国画笔墨趣味、儿童画稚拙趣味、夸张表现趣味。
2) element
元素
1.
Determination of impurity elements in pure copper by constant current electrolysis-ICP-AES;
恒电流电解-ICP-AES法测定纯铜中杂质元素
2.
Simultaneous Determination of 14 Elements in Vegetables by ICP-MS with Microwave Digestion;
微波消解ICP-MS法同时测定蔬菜中14种元素
3.
Determination of 16 mineral elements and acrylamide in barley tea samples produced in three different regions of China;
不同产地大麦茶中16种元素及丙烯酰胺含量分析
3) elements
元素
1.
A Preliminarry Discussion on the Analysis Methods for Inorganic Elements Used in the National Investigation Program of Soil Pollution;
全国土壤污染状况调查样品元素分析测试技术探讨
2.
To Measure Variety Elements in the Soil and Mud by X-ray Fluorescence Spectrographic;
X射线荧光光谱法测定土壤及底泥中多种元素
3.
Concentration and distribution of elements in coals from DPR Korea;
朝鲜煤中元素含量及分布
4) beryllium
Be元素
5) As
As元素
1.
Releasing of As in Coal and Fly Ash of Chongqing Power Plant under Organic Acid Conditions;
重庆电厂炉前煤及飞灰中As元素在有机酸作用下的淋滤行为
6) Chemical elements
元素
1.
The distribution and abundance of chemical elements in different parts of Navel orange in Fengjie County, China;
奉节脐橙不同器官元素含量分布特征
2.
study on the features of the contents,distributions and accumulations of 11 chemical elements in soils and vegetations was carried out in each of the subalpine meadow zone ,the mountain five-flowered herbosa meadow zone and the evergreen coniferous forest meadow of the Mountain Meadow Natural Reserve in Mt .
本文研究了各生态带土壤和植被中11种化学元素的含量、分布及生物积累特征。
3.
he contents of twenty four chemical elements of several main soil types in the Taklamakan Desert areas were measured and obtained the natural element background values of the soils for those chemical elements.
本文通过对塔克拉玛干沙漠地区几种主要土壤类型中24种化学元素含量的分析测定,搞清了土壤中各种元素的自然含量水平和分布特征,填补了塔克拉玛干沙漠地区土壤元素背景值的空白,同时探讨了影响本地区土壤元素背景值的各种因素。
参考词条
补充资料:元素替代效应(effectsofatomicsubstitutions)
元素替代效应(effectsofatomicsubstitutions)
元素替代或掺杂效应,例如对氧化物超导体的某种化学元素为其他某种元素部分替代或由另外元素来替代后对超导电性的影响程度称元素替代效应。由于氧化物超导体的CuO2平面载流子层对产生高温超导电性起有主要作用,所以元素替代或掺杂效应一般地有三种情况:⑴发生在非CuO2面的元素替代对CuO2面的性质基本无影响或无影响;⑵发生在非CuO2面的元素替代对CuO2面性质产生影响;⑶发生在CuO2面上的元素替代对超导电性质的影响程度。例如对Y系氧化物超导体YBa2Cu3O7,若用La或Nd或Sm等替代Y元素,它们对CuO2平面载流层性质均可说无影响,它们的Tc≈90K均一样,这是属于上述⑴的情形。对镧系氧化物超导体(La1-xBax)2CuO4,这里x=0.08时对应的Tc=30K。但若用Sr或Ca替代Ba元素(x仍是0.08),CuO2平面载流层的性质就有变化,此时Tc分别对应为20K和40K,这是上述⑵的情形。上述第⑶种情形,例如对镧系的La1.85Sr0.15Cu1-xNixO4±y,这里用Ni部分地替代Cu。实验显示,少量的掺杂Ni即可引起Tc的急剧下降,且随着x的逐渐增加,其导电行为从金属性质变为半导体性质。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。