难以克服

These tendons also can assume the moments at the end of the beams in ordinary condition. By way of these tendons, precast beams and columns can be assembled conveniently, and the joints and frame are monolithic and continuous. Consequently, compared with common reinforced concrete frames, this kind of frame systems possess higher reliability and solved the problems in the process of assembling Prestressed Concrete frames. Also it forms the framework of Prestressed Subassemblage concrete frame, and explores a new way for industrial production of prestressed structures.

后张预应力筋既可作为施工阶段拼装手段，又可在使用阶段承受梁端弯矩，构成整体受力节点和连续受力框架，克服了装配式节点受力可靠性差的缺陷，解决了预应力混凝土框架难以装配的问题，形成预制预应力混凝土装配整体式框架，开辟了预应力结构工业化生产的新途径。

In degraded PSM matching classification, errors modification method of degraded PSM is presented and the matching tensor of every canonical scattering centers is given. In Chapter 4, the theory of wideband millimeter-wave radar target identification is introduced. It is indicated that, for HR radar target identification, description of temoral relations among features and pattern recogntion adaptive to variation of target angles are of key importance. A rule-based pattern recogniton method of sequential reasoning is proposed, which uses a series of rules to describe relations of features variation caused by target angles variation and has the advantages of adaption to unrandom variation and false probability control in classification over traditional statistical pattern recognitiop method. Feature extraction is crucial step in target identification. In range profiles identification application, features are extracted by means of range domain pre-processing algorithm, spacial and amplitude visual computation directly from range profiles and transform algorithm based on range profiles. Visual or transformed features are either sufficiently convinced or necessarily convinced and both of them are effective and robust to range profiles identification.

在第四章，首先对宽带毫米波体制背景下目标识别方法的一些特点进行了阐述并指出，在毫米波雷达目标识别中，特征之间动态关系的描述以及能适应目标姿态角变化的模式识别方法的研究乃是要解决的关键问题；进而提出了一种基于规则库的序贯推理模式识别新方法，在这种方法的研究中，主要包括序贯推理规则库的规则排列与特征选用顺序以及规则库的收敛等问题；这种方法克服了传统的统计模式识别方法特征利用效率不高、难以适应特征值的非随机性变化的缺点，把姿态角变化所引起的特征的变化用一系列规则加以表示，其优点是能适应特征值的非随机性动态变化，并能控制分类过程中的差错概率α；特征抽取是目标识别中的关键步骤，在基于目标距离像的特征抽取方法研究中，提出了距离空间域的预处理算法、距离空间域与幅度域的直观特征抽取方法以及基于目标距离像变换分析的特征抽取方法。

As one of the macro-manipulative measures, planning can be understood on two levels, first, as comprehensive blueprinting of national economy and social development; second, as regulation imposed upon certain important economic activities in the operation of national economy.

尤其在我国现阶段，由于市场机制不健全，市场的缺陷有可能人为地扩大；在经济增长时期和体制转换时期，又容易发生结构失衡和经济动荡，这是市场本身难以防范和克服的；对于地区之间的发展不平衡和个人之间的收入分配悬殊等问题，市场也无能为力。

The detector first combines the technology of single chip with the technology of artificial neural network , colligates the strongpoint of single chip and artificial neural network , overcomes the difficulty of linearization between gas sensor output and gas concentration.

该仪器首次将单片机与人工神经网络相结合用于气体浓度检测，综合了单片机和人工神经网络的优点，克服了传统仪器气体传感器输出与气体浓度难以线性化等缺点。

After repeated studies, we found that gradient vector flow deformable model is robust to model initialization and not stagnant by local energy minimum, but still is difficult to handle boundary concavities. Thus, we develop a modified technique to overcome this drawback. This technique makes active contour further progress into concavities.

经过反覆实作，我们发现GVF较不受模型初始值之影响，而且不会因局部极小能量而停滞，然而此法仍难以进入凹陷处，因此我们也研发了一种改良技术来克服这个缺点。

After all, it is said that "True Love" is boundless and immeasurable and overcomes all forms of adversity.

毕竟，这是说，&真爱&是无限的和难以估量的，并克服了各种形式的逆境。

Dynamic mathematical model of ball mill pulverizing system with storage bunker is obtained by mechanism analysis.

为克服单一算法难以适应该系统的大范围非线性特性，采用多模型自适应解耦算法。

Good effect is obtained. The application of derivative sign binary algorithm in interference fringe skeletonizing overcomes the difficulty of threshold picking in ordinary binary methods.

导数符号二值图法在提取干涉条纹中心过程中的运用，克服了普通二值化方法中阈值难以选取的问题，提高了测量的精确度。

At last,the closed contour curve of treatment region of mode B ultrasonic monitoring image is obtained by morphology post-processing.The results show that the size of treatment region can be detected better from mode B...

结果证明：该方法克服了传统图像分割方法阈值难以确定的瓶颈，能够更好地从B超图像中检测出HIFU治疗区域的大小。

Soon after the appearance of this thinking, the guiding principle of the Party made a volte face, which was attributable to a lot of causes.

其中，正确处理人民内部矛盾思想在两大问题上带有难以避免的认识缺陷：一是如何克服执政党存在的官僚主义等问题；二是如何认识社会主义社会的阶级斗争问题。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。