The solution of optimal lineac programming can be greatly simplified by usingthe continual matrix primary transformation instead of the basis change and iteration in the simplex method.
将单纯形方法的换基迭代过程代之以矩阵的初等变换，从而使得线性规划最优解的求解过程大大简化。
2) Exchangeable bases,especially exchangeable Mg~(2+),K~+ and Na~+,in various layers of the soils in the protected fields were much higher than those in the control,not only in content, but also in saturation,whereas soil exchangeable Ca~(3+) did not vary much,but the base saturation and exchangeable Ca~(2+) saturation decreased significantly.
在辽宁省沈阳市于洪地区采集保护地及其相邻露地旱田土壤样品,测定土壤交换性酸、交换性盐基离子组成和土壤pH,研究保护地土壤酸化特征以及土壤pH与潜性酸、交换性盐基的关系。
complementary ion effect of exchangeable base
交换性盐基互补离子效应
It occurs as an exchangeable base in the clay mineral and organic fractions of soils.
钙是以交换性盐基在粘土矿物及土壤的有机部分出现的。
Association between Human Urate-anion Exchanger (hURAT1) Gene C426T Polymorphism and Hyperuricemia;
人尿酸盐阴离子交换器基因C426T多态性与高尿酸血症相关性的初步研究
Preparation of calcium ion-exchange resin and the study on its desalting property
糖用钙型离子交换树脂的制备及其脱盐特性
Hydrothermal Synthesis of NASICON-type Zirconium Phosphate Crystals and Their Characteristics of Ion-exchange Assembly;
NASICON构型磷酸锆盐晶体的水热合成及其交换组装性能研究
The Influence of Ion Exchange on the Structure and Properties of Borosilicate Flat Glass;
离子交换对硼硅酸盐平板玻璃结构和性能的影响
Effects of salt water treatments on gas exchange characteristics,photosynthetic pigment and soluble sugar content of Calligonum spp. at different times
盐水处理对沙拐枣气体交换特征、光合色素和可溶性糖含量的影响
Soil NaCl stress and photosynthetic characteristics with Clerodendrum trichotomum
土壤盐胁迫对海州常山形态与气体交换特性的影响
Research on Performance of OC-label-based Optical Packet Switching
基于光码标记的光分组交换性能研究
RESEARCH ON EXCHANGE PERFORMANCE OF WACR BY FIA-ISE METHOD
基于FIA-ISE测定WACR交换性能的研究
Study on B-Reno's performance over packet switching networks
基于分组交换网络的B-Reno性能研究
Optical time-slot based switching networks and its performance analysis
基于时隙的光交换网络及其性能分析
They combine attributes of their desktop and backbone counterparts.
它们将台式交换机和基干交换机的属性结合起来了。
They used to barter for horses with salt.
他们过去以食盐交换马匹。
Complete demineralization is achieved by ion exchange.
用离子交换可以获得彻底的脱盐效果。
Experimental Study of Oxgen Isotopic Fractionation in Carbonate Water-rock Interaction;
碳酸盐矿物的氧同位素交换实验研究
The Study of Transesterification Reaction Using Polyoxometalates as Catalyst;
多金属氧酸盐酸催化酯交换反应研究
Discussion on the Application of the Desalination Technologies Based on EDI(Electrodialysis)and Ion Exchange
EDI与离子交换除盐技术的应用探讨