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Finally, this dissertation offers suggestions to improve middle school principals\' leadership respectively from the three perspectives of profession, system and subject on the basis of issue investigation and root causes analysis. From the perspective of major, we should place the professional role of school principal on educational leader, and educational leadership is the core professional standard for principals. From the perspective of system, the professional standards and qualification system of the principals should be set up in the pre-entry period, and we should reform the principal\'s selection mechanism and perfect the principal occupation term system in the entry period. we should perfect the systems of duty, training, evaluation and motivation etc.. we should set up healthy work termination system in the principal retirement period. From the perspective of subject, school principals should accurately grasp the meaning of leadership to upgrade the level of education al leadership at multi-levels and in multi paths. Administrators should strive to improve the educational leadership level to realize the professionalization of educational administration, Researchers and trainers should really become the supporters of the principal professional development and leaders of leadership practice improvement.

最后，本文针对调查的问题发现与根源剖析，分别从专业、制度、主体等三个视角提出改进中学校长领导力的对策建议：专业上——应将校长领导力的专业角色定位于教育领导者，教育领导力是校长专业标准的内核所在；制度上——拟入职环节应建立校长专业标准和健全校长资格制度，入职环节应改革校长选拔机制和完善校长任期制度，在职环节应健全校长职责、培训、评估、激励等制度，退职环节应建立健康的校长退出机制；主体上——校长应准确把握领导力内涵、多层次、多途径提升教育领导力水平，教育行政人员应努力提高教育领导水平、逐步实现教育行政专业化，研训者应真正成为校长专业发展的支持者、领导实践改进的引领者。

We use the approximate distribution comes from probability generating function of CreditRisk+ to value the CDO under the single sector factor and multi-sector factors scenarios. For single sector factor model, we discuss the sensitive analysis of CDO fair spread by different default probability, default correlation and loss given default. For multi-sector factors model, we exam the CDO fair spread based on different sector correlation assumption, such as Gamma distribution in moment match method, multivariate Gamma distribution and compound Gamma distribution.

本文在信用风险加成模型之下，利用机率产生函数的近似分配评价抵押债务债券，并考虑单一部门因子与多个部门因子，单一部门因子中，在不同违约机率、违约相关系数和违约损失率下，探讨抵押债务债券公平价差之敏感度分析；多个部门因子中，在不同相关性部门因子分配假设下，如动差配适法的伽玛分配、多维伽玛分配、复合伽玛分配，探讨抵押债务债券公平价差之方法结果比较。

The effective heat-transfer temperature difference of every effect of multi-effect evaporation subsystem and the preheat temperature rise Δt_(p,j of every level of multi-level preheat subsystem of the design model were distributed by equal heating area, equal heat-transfer temperature difference, and free proration methods.

设计型模型对多效蒸发子系统各效有效传热温差Δt_i的分配和多级预热子系统各级预热温升Δt_的分配分别采用等面积法、等温差法、自由配比法等进行分配并采用矩阵法结合迭代法进行设计模拟计算，其中自由配比法巧妙地将具有复杂约束条件的决策变量Δt_i和Δt_转化为取值0～1的中间决策变量τ_i、τ_，为Δt_i和Δt_的自由搜索进而为优化设计提供了一个简便的方法；在常规设计模拟计算的基础上，建立了复杂多效蒸发系统优化设计模型，该模型以系统年总费用最小为优化目标，以生蒸汽温度T_0、冷凝器中二次蒸汽温度T_K、蒸发温差配比系数τ_i和预热温升配比系数τ_为决策变量，采用遗传算法结合矩阵法求解。

Samples of the composites were taken for histological examination at day 7 and day 14 since OKCs were seeded. Results Multi-layer epithelia without hemidesmosome and basal membrane were observed in composites of PGA showing ill-defined cell layers. OKCs could adhere and proliferate onto collagen membrane forming multi-layer epithelia, with no mature hemidesmosome and basal membrane. That of Alloderm showed normal epithelial structures, with hemidesmosome, basal membrane and cell pseudopod in lamina propria.

结果 以PGA为支架构建的组织工程化口腔黏膜，含类似上皮层和固有层，但细胞层次不清；胶原膜上可见口腔黏膜上皮细胞黏附生长，并形成复层上皮样组织，但无成熟的桥粒及基底膜样结构；以Alloderm作为支架材料的构建物，出现正常上皮形态，含半桥粒及细胞指状突起等超微结构。

With the combination of the optimal control theory and MCTDH method, optimal controlling of multi-dimensional multi-state molecule such as pyrazine is realized. The quantum dynamics of this molecule under the excitation of optimal pulse is simulated.

结合MCTDH方法和优化控制理论，以具有三个电子能级，三个振动自由度的吡嗪分子为例，模拟了优化飞秒激光作用下的量子分子动力学过程。

This dissertation has developed a new kind of multi-target multi-wavelength pyrometer and successfully used in the ground experiments of SPRE plume temperature measurement.

本论文工作研制了测量一定空间分布的多目标多波长高温计并成功地用于地面搭载试验。

In this system, a multi-channel selecting switch is added in front of the A/D to acquire the multi-channel signal from the colorimetric pyrometer .

系统在A／D的前端加上多信道选择开关，实现多色比色测温仪的多路信号采集；由单片机控制数据的采集和缓冲，数据则用上位机进行实时处理。

Firstly, the meanings of multi-objective and layered optimization is explained in detail and the steady-state optimization based on quadratic programming is presented to solve the multi-objective and layered optimization in the context of two-stage model predictive control formulation.

本文围绕预测控制的滚动优化特点，对预测控制中的若干问题进行了深入研究，在总结目前已有研究成果的基础上做出了有效的改进，提出了自己的创新点。

The meaning of multi-objective and layered optimization is explained in detail and the steady-state optimization based on quadratic programming is presented to solve the multi-objective and layered optimization in the context of two-stage model predictive control formulation.

详细阐述了复杂工业过程的多目标分层优化要求的含义，在预测控制两级分层结构的基础上提出了基于二次规划的定态优化有效求解方法。

It is in possession of advanced Japanese-made computer embroidery machine, Korean-made multi-needle quilter, US-made single-needle quilter and non-shuttle multi-needle quilter and Japanese-made special sowing machine etc.

拥有先进的日本电脑绣花机、韩国多针绗缝机、美国单针绗缝机和无梭多针绗缝机，以及日本产青柳特种缝纫机等。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。