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The first step of IGA was to discretize time interval and control region to make the continuous dynamic optimization problem a discrete problem.

针对化工动态优化的数值求解问题，提出将迭代思想与遗传操作相结合，构建迭代遗传算法。

Optimization design is often used in the design of MRI superconducting main magnet, where all variables are treated as continuous ones. According to the fact that not all variables are continuous, here the design problem is seen as a global optimization problem with discrete variables.

软件简介：在进行MRI超导主磁体的设计时常采用优化设计的方法，将各设计参数看作连续变量处理，但实际上很多参数是离散变量，为了更符合工程实际，将超导MRI 主磁体的设计作为一个含有离散变量的全局优化问题。

Based on the analysis of the transportation network design problem, the discrete transportation network design problem was discussed.

交通网络规划的目的在于更好地满足现在或将来的交通需求状况，使交通出行流量合理的分布在交通网络上。

ECC is set up on the basis of solving this mathematics difficult problem of the Elliptic Curve Discrete Logarithm Problem.

椭圆曲线密码体制建立在解椭圆曲线离散对数问题这一数学难题的基础上。

"The problem is how to motivate managers to disgorge the cash rather than investing it below the cost of capital or wasting it on organizational inefficiencies." The solution to this problem can, in some circumstances, be debt financing.

323的方式表达："问题是如何激发管理者交出现金，而不是投资于低于资本成本或者浪费在组织机构的低效率上"这个问题的解决方案，在某种情况下，是融资债券。

But can we thought, my real problem is not economic issues is not the problem of racial disharmony.

但是我们是否可以思考，我国真正的问题不是经济的问题也不是种族不和谐的问题。

In the past years, the settlement to the problem has been mostly bottom disposure: the means only transforms waste from one form to another, and the waste doesn"t disappear from the earth or is reused in the new flow, thus this can"t resolve the problem ultimately.

近几十年，对这一矛盾的解决主要还是停留在废物的末端治理上，但从长远看，这种方法只是将废物从一种形式转化成了另一种形式，该废物并没有从地球上消失，也很少被重新利用进入新的流程，所以这种方法是治标不治本的。

Based on the given results of second order boundary value problem, the existence of solutions of nonlinear boundary value problem of Volterra type integro-differential nonlinear equation was established. The uniquess of solution was obtained by applying disproof method.

以二阶边值问题的已知结果为基础，建立了Volterra型积分微分非线性边值问题的解的存在性，再利用反证法获得了解的惟一性。

Based on the shortest path problem and classical absolute center model, an algorithm of absolute center problem is discussed, by using the least distance matrix and the optimum path matrix.

在最短路算法和传统的绝对中心点模型的基础上介绍了一种利用最小距离矩阵和最优路径矩阵求取绝对中心点的算法。

Therefore, a control problem of distributed parameter systems is simplified to a control problem of a linear system.

再次，证明了管式反应器具有可控性，应用最优线性二次型调节器方法对该系统进行控制，将分布参数系统这一特殊的、复杂的系统的控制问题简化为一般线性系统的控制问题，同时，提出了一种将分布参数系统这种非线性系统的控制问题转化为一般线性控制理论进行控制的方法。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。