The name of it comes from the lower-triangular form of system matrix in state-space equations when it is linear.
这一名称来源于下三角结构线性系统写成状态空间表达式后，系统矩阵中所表现出的下三角形状；
Owing to the character of structure of lower-triangular system, the high-rank state of each differential equation is used as virtual control, then the control law is constructed by recursive design.
根据下三角系统的结构特点，将系统每个微分方程中的高阶状态用作虚拟控制进行设计，通过循环设计最终得到系统控制所需要的控制策略。
All the land tortoise species formed a tight cluster of points in the upper part of the triangle; all the water turtles cluster in the lower part of the triangular graph.
所有陆龟品种都在三角形的上部形成一个紧密的点群；所有的水龟都聚集在三角图的下方。
Compared with that using a kimematically admissble triangular velocity field, the solution can give enen lower values than that of a kimematically admissble triangular velocity field sometimes.
该解与以运动许可的三角形速度场得到的上界解进行比较表明，有时本解法可得到更低的上界值。
Compared to rectangular and circular patch antenna loaded with a shorting pin, triangular patch antenna loaded with a shorting pin has lower resonant frequency.
与短路针加载矩形和圆形贴片天线相比，短路针加载三角形贴片天线具有更低的谐振频率。
This paper constructs irregular LDPC codes of unequal error protection with a parity check matrix in a lower triangular.
采用了近似下三角校验阵的形式，构造了一类具有不等错误保护的非规则ldpc码。
Conclusion. In most cases, the vertebral body shape is hemispherical in the upper part of the pedicle and triangular in the lower part of the pedicle.
结论：大多数的病例，椎弓根上半部的椎体外形为半球形，下半部为三角形。
However, the average electrical field strength and energy consumption for the maximum enhancement factor for the triangular rod electrode are much lower than for the cylindrical electrode.
在达到最大强化因数时，三角形电极所需要施加的平均电场强度和能耗比圆柱电极低得多。
The residual implication generated from lower semi-continuous triangular norm was introduced.
介绍了由下半连续三角模生成的剩余蕴涵。
A substance is through the primary transformation into an upper triangular matrix, the transformation matrix is a unit lower triangular matrix.
实质上是将A通过初等行变换变成一个上三角矩阵，其变换矩阵就是一个单位下三角矩阵。
It has been found that the use of triangular elements for performing an economic optimization along with a release of Angle constraint can result in even lower freight charges.
采用三角形单元体进行经济学优化，并释放角度约束，能得到更低的运输费用。
The ears are triangular in shape with a rounded lower edge, set low and attached to the skull at approximately eye level.
耳朵呈三角形，底端圆，在脑袋的位置低，接近眼睛所在的水平线。
The diamond drilling teeth covered with antiwear alloy are welded to the lower end of drilling body and a triangular drilling shank is welded to the upper end.
该钻头是在钻体的下端焊接着有一定耐磨性合金包镶金刚石的钻齿，上端焊接着钻柄。
The diamond drilling teeth covered with antiwear alloy are welded to the lower end of drilling body and a triangular drilling shank is welded to the upper end.
该钻头是在钻体的下端焊接着有一定耐磨性合金包镶金刚石的钻齿，上端焊接着钻柄。
应用推荐