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- 与 非局部的 相关的网络例句 [注:此内容来源于网络,仅供参考]
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In order to study the stability of non-Newtonian fluid and its flow pattern discrimination method,the integral stability theory and local stability theory are applied to the concentric annulus flowing of plastic fluid and power-law fluid,then a relevant stability parameter expression of discriminating flow pattern is derived and set up in the paper.
针对非牛顿流体的稳定性问题及其流态判别的研究,将整体稳定性理论及局部稳定性理论应用于塑性流体和幂律流体在同心环空的流动中,建立和推导出相对应的判别流动状态的稳定性参数表达式。这些参数的临界值与牛顿液体流态准数雷诺数的临界值,同样具有与液体流变性无关的特点。
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At this text I bring forward effective project strategy of non-maturity haleness watermark model arithmetic. Making use of time-frequency local characteristic of wavelet switch, I bring forward digital image watermark insetting project basing on block of wavelet switch, at the first ,make the image disporting to block of 8×8,then make use of the characteristic of Haar wavelet switch,then make the image the second layer wavelet switch and carry through power modulus transaction.
本文提出了非完备性鲁棒性数字水印典型算法中的行之有效的设计策略,利用小波变换良好的时频局部特性,提出了基于块的小波变换的数字图像水印嵌入方案,把宿主图像分为8×8的小块,利用 Haar小波变换的特性,对图像进行二层小波变换分解,对变换系数进行权重处理,然后把每一个水印象素隐藏在相应的图像块的中低频小波系数之中,提高了数字水印的隐蔽性和鲁棒性。
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Theobserved strain is 10~2 times as local point strain at the same observed stress.This indicates that macroscopical symmetrical rock is quasi-brittle materialwith microcosmic heterogeneousness and its macroscopical mechanicalbehavior is the results of reciprocity and magnification between microcosmiccharacteristic, not simple sum.(4) The degree of irregularity of strain increases with the number of cycle.But degree of irregularity of transverse strain fluctuates larger at the samecycle. Moreover degree of irregularity of transverse strain is larger than that ofaxial strain. This shows that deformation and failure of rock is process ofevolvement of small crack. Small crack evolves from even and out-of-orderstatus to heterogeneous and ordinal status.(5) Ultrasonic speed decreases with the number of cycle. The decreasecourse is such: Firstly, ultrasonic speed fluctuates in a steady scope in somecycles; And then ultrasonic speed quickly decreases to a certain more smallvalue; Afterwards in succedent cycles, ultrasonic speed fluctuates about thevalue. That is to say, ultrasonic speed fluctuates and decreases at intervals ofcycles. In deformation process of rock, quantitative change and qualitativechange of its small crack evolvement carry through crosswise.(6) Strength and modulus of rock decrease with exponential function asscale of specimens increases.
同一表观应力下,局部点应变与表观应变相差可达2个数量级,表明宏观上均匀的岩石是具有细观特征的准脆性材料,其宏观力学行为是细观特征相互作用、放大的综合结果,而不是简单的叠加;(4)岩样轴向应变不均匀程度和横向应变不均匀程度随循环次数的增加渐进增大,但是在同一个循环内,横向应变离散系数随应力的变化波动较大,且同一循环级别下,横向应变不均匀程度大于轴向应变不均匀程度,表明岩石内部微裂纹的演化是岩石变形破坏的本质特征,这一演化表现为微裂纹从均匀无序分布逐渐向非均匀有序发展;(5)随循环次数的增加,所有岩样内部超声波速会出现衰减,衰减过程表现为在某几次循环内超声波速在某一相对范围内波动,然后急剧减小到某一较小值,在随后的循环内,超声波速又会保持在这一较小值附近波动,即超声波速表现为波动和急剧减小间隔形式衰减,表明从宏观看来平稳的岩石变形过程,内部结构演化过程(微裂纹发展及其相互作用)却表现为均匀量变和突发质变不断交叉进行的现象;(6)岩石强度和弹性模量随尺度增大呈指数函数规律减小。
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The project proposed and established the strict unique mathematical model of instantaneous frequency aiming at the currently existed problems in Hilbert Huang Transform form the viewpoint of physical connotative meaning; proposed and established the strict mathematical model of general intrinsic mode signal based on the concept of general continuous intrinsic mode signal and the compositive principle of practical general intrinsic mode signal; researched and proposed the fitting method of envelope lines in HHT from the viewpoint of theory, conquered the blindness and random in quondam EMD envelope line fitting and boundary treatment; developed a virtual time-frequency analyzer based on general intrinsic mode signal decomposition to open out the local time-frequency characteristics of nonlinear and nonstationary signal more deeply and accurately.
本项目针对希尔伯特-黄变换现阶段存在问题,从物理内涵的角度提出并建立了瞬时频率严格的唯一的数学模型;基于连续性的一般固有模态信号的概念和实际信号的一般固有模态信号的组成原理,提出并建立了一般固有模态信号严格的数学模型;从理论角度研究并提出HHT中的包络线构造方法,克服了原EMD的包络线构造和边界处理的盲目性和随意性;研发一台基于一般固有模态信号分解的虚拟式时频分析仪,使之可以更深入、准确地揭示非线性非平稳信号的时频局部特征。
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Through such a study, it is also shown that when the time delay is long enough such that the stability switches of the equilibrium of system halt, the bifurcation branches originated from the critical time delays cannot be surely stable or unstable in the whole solution space, that is, their stability depends on cases.
利用打靶法的数值结果说明了当系统平衡点不再发生稳定性切换时,源自这些临界时滞处的解支的稳定性在整个解空间的稳定性具有不可判定性,这也说明由多尺度法所得高阶近似判定的解支的稳定性事实上只表示解支在局部中心流形上的稳定性,而非在整个解空间中的稳定性。
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The geology research of carbonate reservoirs in Ordovician of Tahe oilfield showed that many large dissolved vugs and fractures were developed. The spread of the reservoir take on a very heterogeneous state. And the typical fractured-vuggy reservoirs was formed. According to the combination of the various spaces, the formation was divided into vuggy formation, fractured-vuggy formation and fractured formation. The research showed that development of the vug is relevant to the its position on the structure, the fractures, the water surface and the weathering surface. Multi-phase charge and recharge of the oil in the reservoirs resulted in the complexity of the fluid distribution. So the"Bottle Model"was brought forward to explain the movement of the water-oil contact. The special storage space and the complex fluid distribution lead to the unstability of the production and the complexity of the water cut. In order to explain the characteristic of the fracture-vug unit was brought forward and the basic principle and method of the partition of the fracture-vug unit was formed. The classification and evaluation of the units were performed according the reserve and energy. Based on the research of geology characteristic and the fluid flow in the reservoir the comprehensive numerical simulation plan of the fractured-vuggy reservoirs were established. Through the selection of the simulation unit, fluid flow type and parameter equivalent the triple media reservoir simulation model was established. Considering the practical application the model was resolved by the DKR decomposition conjugate grads method. Based on the fine reservoir description of Dsitrict IV of the Tahe oilfield the various space type were classified and combined together. The geology model of Unit S48 was constructed. Two typical single well model was established according to the geology and the dynamic phenomena. Finally the single well model and the Unit S48 were simulated by the triple media reservoir simulator. Via the local grid refinement and coarsening in the simulation good matchs were gained. Based on the results of the simulation the reserve distribution, percent of reserve produced in various space and the natural energy were analyzed. The fluid was storaged in the fractures and vugs mostly and more than 90% the produced oil came from the systems. The energy belonged to the active one. The results of simulation accorded with the fact and showed the validity and practicability the research and the simulator.
塔河油田奥陶系碳酸盐岩油藏的地质研究表明,其储层中发育着很多大型的溶蚀洞、缝,储层的平面展布呈现出极度的非均质性,形成了典型的缝洞型碳酸盐岩油藏,根据各种孔隙介质在储层中的组合,将储层分为了溶洞型、裂缝-溶洞型和裂缝型三类;研究表明溶洞储层的发育和构造位置、裂缝的发育、潜水面和风化面的位置等因素有关;多期充注的油气成藏模式导致了流体复杂的赋存状态,由此提出了所谓的"瓶子模型",解释生产过程中油水界面的变化;特殊的储集空间类型和流体分布特征导致油田在开发过程中表现出很大的不确定性和含水变化的复杂性,为了合理的解释油气田开发过程中的动态特征,提出了"缝洞单元"的概念,并制定了"缝洞单元"纵横向划分的基本原则和依据及划分方法,并对"缝洞单元"进行了分类和评价;基于地质特征和流体在其中流动规律的研究,提出了缝洞型碳酸盐岩油藏的数值模拟综合解决方案,通过模拟单元的选择、流动类型和参数的等效,建立了三重介质油藏三维三相数值模拟模型,采用不完全LU分解预处理共轭梯度法进行了求解;在塔河油田4区精细油藏描述的基础上,将各种类型的孔隙空间进行了归类组合,建立了S48单元的地质模型;通过对油井生产动态进行分析研究,建立了两类和油井地质、生产动态相对应的单井模型;最后应用三重介质油藏数值模拟软件对单井模型和S48单元进行了数值模拟,通过局部加密和粗化等技术模拟流体流动规律,取得了很好的拟合效果;结合数值模拟结果,分析了各种介质中的储量分布、储量产出的百分比以及地层的能量,认为塔河油田缝洞型油藏中流体绝大多数储集于缝洞系统之中,所产出流体90%以上也来自于缝洞系统,其底水能量属于较充足的类型;模拟结果和油田实际情况符合较好,说明了地质研究和油藏数值模拟研究的正确性。
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CaN Aβ gene silencing can reduce myocardial hypertrophy in cultured cells, si1280 (21bp) of CaN Aβ gene is the most effective target site for siRNA. The method of intrapericardial injection of plasmid, microbubbles and erzymes can improve transfection efficiency of non-viral plasmid with satisfying targeted transfection. But the scope of transfected myocytes is still limited. CaN Aβ shRNA expressing plasmid transfection in vivo by pericardial injection results in decreased CaN Aβ protein expression of small part of myocytes, and CaN Aβ mRNA only shows decreased trend. The dosage of non-viral vector and the parameters of ultrasound energy should be optimized in further study.
结论RNAi技术抑制CaN Aβ基因表达可有效减轻Ald诱导的心肌细胞肥大程度;CaN Aβ基因中si1280(21bp)片段为实现RNAi的更有效片段;微泡+酶类心包腔内注射超声导入的方法可有效改善非病毒载体在体心肌的转染效率,同时具有一定的靶向性,但总的转染范围仍然有限;采用这一方法进一步进行&一肾一夹&心肌肥大模型大鼠在体心肌细胞的CaNAβ的RNAi干预,发现心肌肥大大鼠心外膜下局部心肌细胞CaN Aβ蛋白水平降低,CaN AβmRNA水平虽有下降趋势,但无统计学差异,提示质粒的用量及超声导入的参数有待进一步研究使其优化。
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Research groups of Mayo Medical Center, by long-time tracing and researching, find yips which used to be concluded psychological pressure is now proved to be highly related with physical disorders. Not anxiety, as everybody thought, but "focal dystonia" is the major cause of yips.
美国梅佑医学中心的研究团队,经过长时间的追踪与研究,证实发现以往认为导致高球员推杆失常的现象是心理压力所造成;而最新的研究结果,证明易普的产生,所谓的「局部肌张力不全症」与生理失调有绝大的关联;应为导致高球员产生易普症状的主因,而非一般认为临场的焦虑症。
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The polarization curve is not sufficient for a reliable and unique validation of a PEMFC model since different parameters can lead to an identical polarization curve. A three-step validation approach is proposed for a complete and unique validation. These three steps are:(1) validated by the global polarization curve,(2) validated by the local current density distribution curve, and (3) validated by the cathode over-potential and anode over-potential versus current density curve. The results from the comparison of four flow-fields show that the PEMFC performance of the flow-fields decreases in order by interdigitated, metal foam, pin-type and parallel.
通过PEMFC参数敏感性研究发现,PEMFC性能受多种参数的影响,这些参数可分为非敏感性参数、敏感性参数和高敏感性参数;与阳极侧参数相比,PEMFC性能对阴极侧的参数更敏感;不同参数值的组合可以得到几乎完全相同的极化曲线,因此电池的极化曲线不足以用于验证数学模型的唯一性与可靠性;为验证PEMFC数学模型的唯一性与可靠性,提出了模型验证的三步法:极化曲线验证、局部电流密度验证和阳极总过电位与阴极总过电位验证。
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The existence of outer power stayed in Arab world destroys union of geography, society, economy, culture and spirits of Arab world, separates the connection of different regions, obstacles development of Arab unity movement which is thought to be outer factors. However, deeper reasons should be found in inner world. Inner reasons include that political structure of Arab world and deeply dispute weakens the base of Pan-Arabism movement. In local region, the thoughts of Religious Minorities and Sectarianism deny and destroy Arab nationalism movement and its premise-the sincerity of country. Some non-Arab nations pursuit the unity of theirs own not the whole Arab nations. Regional Nationalism and Islamism obstacle the development of Pan-Arab unity movement Weak sovereignty of Arab countries and diverse political rules weaken the political base of movement of Pan-Arab unity. Unbalance of economy, culture and base of society between different regions also lag the unified movement.
内因包括:阿拉伯世界的政治结构和王朝间的利益纷争削弱了泛阿拉伯统一运动的群众基础和民族基础;在局部地区,宗教少数派及其宗派主义思想不断地否定和破坏阿拉伯民族主义运动及其前提——对祖国的忠诚;阿拉伯世界中一些非阿拉伯民族的独立诉求挑战地区的统一;地区民族主义和伊斯兰主义阻碍了泛阿拉伯统一运动的开展;孱弱的国家主权限制了阿拉伯国家在民族事务上的能动性,而多样的政治体制则削弱了泛阿拉伯统一的政治建构基础;阿拉伯各地区或国家间经济、文化和社会发展的不平衡以及整体上的滞后削弱了泛阿拉伯统一运动的经济、文化和社会基础,等等。
- 推荐网络例句
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I didn't watch TV last night, because it .
昨晚我没有看电视,因为电视机坏了。
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Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.
今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。
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I'm running my simile to an extreme.
我比喻得过头了。