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By means of electrochemical and trace amount analysis techniques the dezincification behavior of α+β biphase brass in a deaerated acidified solution of sodium chloride under condition of continuous introduction of Cu~+ into solution was studied.

本文采用电化学和痕量分析方法，研究了在连续引进铜离子的去氧酸性氯化钠溶液中α+β两相黄铜的脱锌行为。

The specific course of the production process is:firstly,make waste electrolyte into saturated solution,then heat it and dissolve it,remove the sodium and mix it with bischofite solution perfectly.

工艺的具体过程是：将废电解质制成饱和溶液，加热溶解、除钠，再与水氯镁石溶液充分混合，经沉降槽自然冷却降温，结晶析出合成光卤石。

Furthermore,the optimal approximation bisymmetric solution pair to a given bisymmetric matrix pair in Frobenius norm can be obtained by finding the least norm bisymmetric solution pair of new matrix equation ,where .

另外，给定双对称矩阵对，通过求矩阵方程的双对称解对，得到它的最佳逼近双对称解对。

Iterative method; Generalized bisymmetric solution; Least-norm solution; Optimal approximation

迭代解法；广义双对称解；极小范数解；最佳逼近。

For any initial generalized bisymmetric matrix $X_1$, when $AXB=C$ is consistent, we can obtain the generalized bisymmetric solution of the matrix equation AXB=C within finite iterative steps by the iteration method in the absence of roundoff errors; Moreover, the least-norm solution $X^*$ can be obtained by choosing a special kind of initial generalized bisymmetric matrix.

在不考虑机器误差的情况下，当矩阵方程AXB=C相容时，对任意广义双对称X_1，矩阵方程AXB=C的解可以经过有限步迭代得到；特别地，通过选择特殊地初始广义双对称矩阵极小范数解X^*。

In addition, the unique optimal approximation solution $\\\\\\\\\\\\\\\\hat X$ to given matrix $X_0 $ in Frobenius norm can be derived by finding the least-norm generalized bisymmetric solution $\\\\\\\\\\\\\\\\widetilde X^\\\\\\\\\\\\\\\\ast$ of the new matrix equation $A\\\\\\\\\\\\\\\\widetilde X B=\\\\\\\\\\\\\\\\widetilde C$, here,$\\\\\\\\\\\\\\\\widetilde X=X-X_0$, and $\\\\\\\\\\\\\\\\widetilde C=C-AX_0B$.

另外，对于给定矩阵X_0的最佳逼近解$\\\\\\\\\\\\\\\\hat X$，可以通过求解新的矩阵方程$A\\\\\\\\\\\\\\\\widetilde X B=\\\\\\\\\\\\\\\\widetilde C$得到，其中$\\\\\\\\\\\\\\\\widetilde X=X-X_0$，$\\\\\\\\\\\\\\\\widetilde C=C-AX_0B$。

The determination of MD1 concentration in aqueous solution by using bromthymol blue indicator method is described and a linear relationship is observed between absorbance and solution concentration ranged in 10-300 mg/L.

介绍了溴百里酚蓝为指示剂测定水溶液中MD 1质量浓度的方法，在10～300mg/L范围内溶液吸光度与浓度之间有良好的线性关系。

Authentication mechanism of WLAN and application of EAP/RADIUS protocols used in IEEE 802.1x standard are researched. With respect to the defects of port based authentication, a new authentication and key distribution solution based on 802.1x is proposed, and its message capsulation formats in every step are described particularly. At last, the security of this solution is analyzed.

研究了无线局域网的认证机制和EAP/RADIUS协议在IEEE 802.1x标准中的应用，针对端口认证的缺陷，提出了一种基于802.1x协议的认证和密钥分配方案，详细说明了每一步的消息封装格式，并对该方案进行了安全性分析。

The results show that The vase planting Dianthus Caryophyllus dealing with 0.01% Phytic Acid + 2% S + 200 mg/L8-HQC solution achieve the best results in all the mensuration indicators. Regardless of the growth of cut flowers, or the water balance and maintainance of fresh weight, the solution have played a impartant function.

结果表明，用0.01%植酸+2%S+200mg/L8-HQC溶液瓶插香石竹在所测定的几个指标中可以达到最好的瓶插效果，无论是对切花的生长，还是对水分平衡和鲜重变化的保持，都起到一定的作用。

The main function of sucrose is to maintain normal respiration, so it can only be used to join the preservative, and make a good effect in maintaining the water balance of Dianthus Caryophyllus when dealing with 0.01% Phytic Acid +2% S +200 mg/L8-HQC solution; Finally, in the mensuration of Dianthus Caryophyllus fresh weight change, no matter using which the vase planting solution, the fresh weight of Dianthus Caryophyllus increases in the initial phase and then gradually decreases.

结果表明：在花径变化的测定中，经0.01%植酸+2%S+200mg/L8-HQC溶液处理的香石竹在保鲜期间得到最好的保鲜效果，切花的生长状况达到最佳状态；在水分平衡的测定中，结果表明蔗糖溶液对香石竹的水分平衡的保持有负作用，蔗糖的作用主要作用是维持正常的呼吸作用，因此它只能用来加入到保鲜剂中，处理0.01%植酸+2%S+200mg/L8-HQC在保持切花的水分平衡上起到较好的效果；最后在香石竹的鲜重变化测定中，无论什么瓶插液，香石竹切花的鲜重在初期阶段增加，然后逐渐减少，水分的吸收与丧失会有波动，但总趋势是失水量大于吸水量。

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。