查询词典 structures

The main contributions of the second part of this dissertation are focused on the cryptographic properties of logical functions over finite field, with the help of the properties of trace functions, and that of p-polynomials, as well as the permutation theory over finite field: The new definition of Chrestenson linear spectrum is given and the relation between the new Chrestenson linear spectrum and the Chrestenson cyclic spectrum is presented, followed by the inverse formula of logical function over finite field; The distribution for linear structures of the logical functions over finite field is discussed and the complete construction of logical functions taking on all vectors as linear structures is suggested, which leads to the conception of the extended affine functions over finite field, whose cryptographic properties is similar to that of the affine functions over field GF (2) and prime field F〓; The relationship between the degeneration of logical functions and the linear structures, the degeneration of logical functions and the support of Chrestenson spectrum, as well as the relation between the nonlinearity and the linear structures are discussed; Using the relation of the logical functions over finite field and the vector logical functions over its prime field, we reveal the relationship between the perfect nonlinear functions over finite field and the vector generalized Bent functions over its prime field; The existence or not of the perfect nonlinear functions with any variables over any finite fields is offered, and some methods are proposed to construct the perfect nonlinear functions by using the balanced p-polynomials over finite field.

重新定义了有限域上逻辑函数的Chrestenson线性谱，考察了新定义的Chrestenson线性谱和原来的Chrestenson循环谱的关系，并利用一组对偶基给出了有限域上逻辑函数的反演公式；给出了有限域上随机变量联合分布的分解式，并利用随机变量联合分布的分解式对有限域上逻辑函数的密码性质进行了研究；给出了有限域上逻辑函数与相应素域上向量逻辑函数的关系，探讨了它们之间密码性质的联系，如平衡性，相关免疫性，扩散性，线性结构以及非线性度等；讨论了有限域上逻辑函数各类线性结构之间的关系，并给出了任意点都是线性结构的逻辑函数的全部构造，由此引出了有限域上的"泛仿射函数"的概念；考察了有限域上逻辑函数的退化性与线性结构的关系、退化性与Chrestenson谱支集的关系；给出了有限域逻辑函数非线性度的定义，利用有限域上逻辑函数的非线性度与相应素域上向量逻辑函数非线性度的关系，考察了有限域上逻辑函数的非线性度与线性结构的关系；利用有限域上逻辑函数与相应素域上向量逻辑函数的关系，揭示了有限域上的广义Bent函数与相应素域上的广义Bent函数的关系，以及有限域上的完全非线性函数与相应素域上向量广义Bent函数之间的关系；给出了任意有限域上任意n元完全非线性函数存在性与否的完整证明，并利用有限域上平衡的p-多项式的性质给出了有限域上完全非线性函数的一些基本构造方法。

Results The total 100 frontal sinuses were all revealed. Of 100 ostia, nasofrontal ducts, ethmoid infundibula, and middle nasal meatuses, 4 didn't show up and 96 could be viewed with air channel and bone channel structures well demonstrated in 70, and the remaining 26 still showed their bone channel structures though their air channel structures were vanished.Conclusion The structures of the ostium of frontal sinus, nasofrontal duct, ethmoid infundibulum, middle nasal meatus, etc.

结果 50例被检查者的50个额窦全部显示；100个窦口、鼻额管、筛漏斗及中鼻道结构，4个未显示，96个被显示，其中70个窦口、鼻额管、筛漏斗及中鼻道的气道结构和骨结构均清晰可见，26个窦口、鼻额管、筛漏斗及中鼻道的气道结构消失但骨结构仍可见。

The mechanical behavior of Shape Memory Alloys material is tested, and the constitutive model of the SMA is established. A kind of SMA combined rubber isolator is developed, and the isolation effect of the SMA combined rubber isolator for long-span bridge and tall building structures is numerically simulated, from which the adaptive isolation performance and the self-restoring capacity of the SMA combined rubber isolator are verified. A kind of SMA damper is developed, the mechanical behavior of the SMA damper is tested, and the model of restoring force of the SMA damper is established. The theory and method of adaptive control based on the SMA damper for the long-span bridge are built, and the effectiveness and reliability of the adaptive control for the long-span bridge using the SMA damper are verified through numerical simulation and model test. The MRF-04K type magnetorheological damper is developed, the mechanical behavior of the MR damper is tested, and the model of restoring force of the MR damper is established. The theory and method of adaptive control based on the MR damper for the long-span bridge and tall building structures are built, and the effectiveness and reliability of the adaptive control for the long-span bridge and tall building structures using the MR damper are verified through numerical simulation and model test. In addition, the theory and method of sub-structural damage identification for long-span bridge are derived, the influence of soil-structure dynamic interaction on the seismic isolation and control effects with different isolation and control measures and the damage responses and the sliding base-isolation of large structures under the excitation of underground explosion are investigated.

试验研究了形状记忆合金材料的力学性能，建立了SMA材料的本构模型；研制了一种SMA复合橡胶隔震支座，数值仿真分析了应用SMA复合橡胶支座的大跨桥梁和高层建筑结构的隔震效果，从而验证了SMA复合橡胶支座的自适应隔震性能及其震后自恢复能力；研制了一种SMA阻尼器，试验研究了SMA阻尼器的力学性能，建立了SMA阻尼器的恢复力模型，建立了基于SMA阻尼器的大跨桥梁结构自适应控制理论与方法，通过数值仿真与模型试验验证了大跨桥梁结构SMA阻尼器自适应控制的有效性与可靠性；研制了一种MRF-04K型磁流变阻尼器，试验研究了MR阻尼器的力学性能，建立了MR阻尼器的恢复力模型，建立了基于MR阻尼器的大跨桥梁和高层建筑结构的自适应控制理论与方法，通过数值仿真和模型试验验证了大跨桥梁和高层建筑结构MR阻尼器自适应控制的有效性与可靠性；还建立了大跨桥梁结构的子结构损伤识别的理论与方法，研究了土-结构动力相互作用对不同隔震和控制措施的减震控制效果的影响以及地下爆炸波作用下各类大型结构的灾害响应与滑移隔震。

Properties of FRP materials have been improved by experimental and analysis on hybrid of two or three kinds of fiber, and various products have been manufactured accordingly. At the same time, the resin and equipment that are suitable for those FRP materials have been developed. A series of key applied techniques, such as strengthening of steel structures, masonry structures and concrete structures reinforced with prestressed FRP, lossless inspectability of structures and so on, have been developed though experimental research according to requests of engineering. There are four codes and guidelines for applying FRP techniques to construct foundational establishment. Among them, one technical specification was published in May 2003. It can be standardization of applying FRP materials on engineering. There have been more than one hundred engineerings strengthened with FRP materials since 1999 based on research and investigation of FRP materials and techniques.

在材料改性研究以及产品开发方面，通过纤维混杂改性，开发出适用于不同工程要求的单一品种纤维和混杂纤维的FRP产品及配套树脂材料、配套设备机具等；在关键应用技术开发方面，根据工程需要，开发出钢结构加固技术、砌体结构加固技术、预应力加固技术、结构无损检测技术等基础设施建设中应用FRP材料的关键技术；在规范标准编制方面，主持编制国家规范标准4项， 1项已获批准实施，其它3项正在按计划进行；在工程应用方面，应用自主开发的材料和技术，改造、加固工程100多项，创造了巨大的经济效益及广泛的社会效益。

Following aspects are specially discussed:(1) In-situ study on the mechanism and the rate determining step of corrosion processes at the interface between metal and corrosion media;(2) Reliability of structures in corrosive environment;(3) In-situ non-destruction corrosion inspection, evaluation, repair and maintenance of engineering structures;(4) A new approach for material selection-life cycle costs, LCC;(5) Terotechnology;(6) Corrosion protection and environmental protection;(7) microbiologically influenced corrosion;(8) Computer aided design of corrosion protection;(9) Corrosion and protection of reinforced concrete structures;(10) Corrosion and protection of marine structures;(11) New development of coating and corrosion inhibitor etc.

论述了腐蚀科学与防护技术几个值得注意的发展动向，它们包括：(1)金属／腐蚀介质界面反应及其快速步骤的原位研究；(2)在腐蚀环境中结构的可靠性；(3)腐蚀的在线无损检测／评价和设备的维修保养；(4)材料优选的新方法－LCC；(5)防护系统工程学；(6)腐性防护与环境保护；(7)微生物腐蚀；(8)腐蚀防护的计算机辅助设计；(9)钢筋混凝土结构的腐蚀防护；(10)海洋工程结构的腐蚀防护；(11)防护涂层和缓蚀剂的新发展等。

There are a series of sedimentary structures in turbidites,such as Bouma sequence,graded bedding, vertical fluid-escape tubes, dish structures,rip-up clasts,load structures, convolute bedding, slump structures and flute marks, etc.

湖底扇浊积岩中有一系列的沉积构造，诸如鲍玛序列、粒序层理、垂向液化逃逸管、碟状构造、撕裂屑、重荷构造、包卷层理和槽模等。

In the combined treatment of the craniopharyngiomas, it is very important to prevent the irradiation injury of the surrounding structures such as the optic nerve, chiasm, hypothalamus and vascular structures. In those structures, the optic nerve and chiasm are the most sensitive ones to the irradiation, and their ability to bear the irradiation is about 9 to 12 Gy. So if the irradiation dose is lower than 9Gy, the treatment will be safe. We have not found any report about the bearability and side effect of the hypothalamus related to the gamma knife radiosurgery.

在治疗过程中，预防病变周围的重要结构如视神经，视交叉，丘脑下部和血管结构的放射性副损伤是非常重要的，在这些重要结构中，视神经和视交叉对放射线最为敏感，其耐受能力约为9～ 12 Gy，因此如果对这些结构的放射剂量在9Gy以下，治疗将是安全的，目前尚无有关丘脑下部的耐受剂量和放射性损伤的文献报道。

Many investigations show that randomicity of structures?parameter will bring large value of stochastic dynamic response of structures. Randomicity of structures?mechanics parameter may be dominant factors. Therefore, introduction of randomicity into system model of structure and using random system model are more reasonable than that of determinate system model. The work in this dissertation mainly consists of two parts.

众多的研究工作表明，结构参数的随机变异性可以引起结构随机动力响应的大幅度涨落，结构力学参数的随机性还可能成为主导因素，在结构系统模型中引入随机性的概念，采用随机结构系统模型是较确定性结构系统模型更为合理的一种选择。

Many investigations show that randomicity of structures'parameter will bring large value of stochastic dynamic response of structures. Randomicity of structures'mechanics parameter may be dominant factors. Therefore, introduction of randomicity into system model of structure and using random system model are more reasonable than that of determinate system model.

众多的研究工作表明，结构参数的随机变异性可以引起结构随机动力响应的大幅度涨落，结构力学参数的随机性还可能成为主导因素，在结构系统模型中引入随机性的概念，采用随机结构系统模型是较确定性结构系统模型更为合理的一种选择。

With reference to the marked li words in the Modern Mandarin Dictionary, 2002 edition, this paper tries to gather up the basic features of the li words from their syllable structures, acceptation structures and internal structures. In syllable aspect, the polysyllable words are dominant. For example, the disyllable words are more than 22 times of the monosyllable words. In acceptation aspects, the multivocal words are less than monovocal words. And in internal structure aspect, the compositive words are much more than the single words.

本文以《现代汉语词典(2002年增补本)》中有标注的詈词为考察对象，从音节结构、词义架构、内部构造方面来考察，初步概括出了这类词的基本特征：从音节结构上看，詈词中多音词占绝对优势，仅双音词就是单音词的22倍强；在词义架构上，詈词以单义词为主，而多义词较少；从词的内部构成情况来看，詈词中合成词大大多于单纯词。

A backer of an Afghan law that critics say legalizes marital rape has rejected the international outcry as foreign meddling.

饱受批评的一项法律的拥护者说合法化的婚内暴力不会受国际舆论的干涉。

Years ago, a ancient Egyptian fleet went to the Land of punt for seeking a kind of flavor named "myrrh", and aromatic plants which has dense exotic style for the queen Hatshepsut.

3500年前的一个古埃及的舰队到&彭特之地&寻找一种叫没药的香料。