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The time-domain response of the induced currents on a scattering object irradiated by a plane wave with a Gaussian pulse in time is expanded as an associate Hermite series in this paper. Using the isomorphism of the associate Hermite function and its Fourier transform, the frequency-domain information can be obtained similarly to the time-domain expansion. According to the corresponding relation between time-domain analysis and frequency-domain analysis, and using the early-time response and the low-frequency information of the induced currents, the non-known coefficients in the expansion series can be decided. The entire responses of the induced currents on the scattering object in both time and frequency domains can be obtained at one time by simultaneous extrapolation computation using both the early-time response and the low-frequency information of the induced currents.
摘要首先根据散射体在高斯脉冲平面波激励下感应电流的能量几乎全部集中在时间轴和频率轴上的有限范围内,该文将时域响应展开为系数待定的连带Hermite级数的叠加,并根据连带Hermite函数的傅里叶变换的自反性,得到与时域响应形式类似的频域响应;然后利用时域方法和频域方法分别计算散射体上感应电流的早时响应和低频信息;最后经过时域和频域联合外推计算,由早时响应和低频信息确定时域和频域响应的待定系数,从而获得了整个时域和频域的完全响应。
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I found that, besides a small, brief start-up current, the nominal value quickly settled to values well within the fuse's rating.
我发现,除了小且简短的上升电流外,标称值在保险丝的额定范围之内的,会快速上升到标称值。
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Combined with animal model of peradaptation to myocardium ischemia , the research observed the level of enzymatic dynamics of myocardium, SOD,MDA,ET and correlation peptide of calcitonin gene in peripheral blood and cardiac function, apoptic cell and expression of apoptosis regulatory gene, ultrastructure of myocardium with BIOPAC16, in situ end labeling and hybridism, optic microscope and electron microscope. The study of animal model of peradaptation to myocardium ischemia illustrated that the peradaptation and pretreatment with Wenxin capsule could be positively protective for the injury of ischemia reperfusion. The protection is mainly reflected by reduction of infarction area, correction of heart rhythm abnormality of ischemia reperfusion, melioration of the contraction and relaxation function of myocardium, recovery of the subcellular structure and themelioration of the abnormality of biochemical and bioactive substance in the myocardium.
并结合心肌缺血预适应动物模型,采用BIOPAC16导生理记录和分析处理系统处理心肌功能指标,采用原位末端标记及原位杂交技术标记凋亡细胞及凋亡相关调控基因的表达,采用光电镜技术观察心肌超微结构的变化,同时观察外周血心肌酶、超氧化物歧化酶、丙二醛、内皮素、降钙素基因相关肽等水平,结果表明心肌缺血预适应及温心胶囊预处理对心肌缺血再灌注损伤具有肯定的保护作用,其保护心脏作用主要表现在缩小心肌梗死范围、抗缺血再灌注心律失常、改善心肌收缩和舒张功能、减轻心肌超微结构损伤,调节心肌生化物质及生物活性物质的生成和释放。
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The synthetic punitive function combining internal point and outer point, and Powell optimal techniques are used in the control system to find the optimal point of the objective function among the real conditions. The AOCPF package has run for about one week in the semiselective flotation circuit of this plant.
为了在约束条件规定的现实范围内找到目标函数的最佳点,作者将内点法与外点法相结合的混合罚函数法、Powell优化方法引入了浮选过程的自适应优化控制。
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After +10Gz exposure the intensity of HSP70 expression was weak and the extension was localized.
2Gz~+6Gz暴露后HSP70的表达在分布上无明显变化,而只是强度上的差异,而+10Gz暴露后HSP70的表达除强度较弱外,其表达范围也较局限。
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The relationships among the targeted neurovascular structures were described and the difference between the median and paramedian infratentorial-supracerebellar approaches were analyzed. Results: The median infratcntorial-supracerebellar approaches provided direct exposure of the incisural space, although culmen represented a relative obstacle to expose of the quadrigeminat area.
结果:正中幕下小脑上入路直接暴露厂后切迹间隙,但山于小脑对视野的阻碍,限制了四叠体板下半部分的暴露;旁正中幕下小脑上入路视野范围集中在中切迹水平的脑干背外侧面区域,且可以观察到同侧的上、下丘。
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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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The extinction or appearance of these Ostracoda always occurred in a short time interval, and can be correlated locally and globally, so they are of importance in bioeventstratigraphy. This article listed six such biological events in Qaidam Basin and discussed their causes. The extinction of Cetacella reflected temperature decrease at global scale and changes of palaeoclimate zones during the latest Jurassic and the earliest Cretaceous; The rapid decline of Cypridea in the earliest Cretaceous may be a result of the strikes of small planets; at the latest middle-Eocene Austrocypris became extinct, and at Oligocene Hemicyprinotus disappeared. These events related to the changes of the geological conditions at that time. The explosion of Cyprideis at the middle-Miocene was because the rise of Qinghai-Xizang Plateau which resulted in the dry climate and development of salt lakes.
这些水生生物的绝灭或发生均很迅速,在区域或全球范围内均可对比,具有生物事件地层学意义:Cetacella属的绝灭可能是侏罗、白垩纪之交全球性的古气候降温和气候带变化在柴达木盆地的反映;早白垩世之后Cypridea的迅速衰退是地外因素灾变的结果;中始新世晚期的Austrocypris的绝灭、渐新世Hemicyprinotus的绝灭都与当时地质条件的改变存在著内在的联系;中中新世Cyprideis的爆发推断是青藏高原隆升,导致气候乾燥、湖水咸化的结果;而晚更新世晚期1。
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The results show that, for the elasto-plastic contact of tip-substrate approach and separation process, the material plastic yielding in the atomic level is still governed by the von Mises criterion. For the adhesion of flat-ended wedges, continuum mechanics can be still applied down to a few lattice constants within the contact region, and give reasonable results, apart from the discrepancies near the contact edges. Moreover, adhesion hysteresis occurs during unloading due to the atomic steps, where the unloading curve does not coincide with the loading one. This in turn supports the presumption proposed by Pollock for the adhesion of stepped spheres.
本文首先对针尖—基体模型的弹塑性接触机理进行了深入研究,指出在原子水平上材料的塑性屈服仍由Von Mises准则控制;对平底锥冲头粘着接触的模拟表明,除了在接触区边缘附近有一定差别外,接触力学方法在接触区内几个晶格常数范围内仍能给出令人满意的结果;由于原子台阶效应,加载与卸载曲线不重合,出现粘着滞后,证实了Pollock关于具有纳米阶梯结构的球体粘着滞后现象的推测。
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Apart from the above covering viscosity and business card printing and membership card making adaptability, when we consider that the Ink viscosity is part of a business card printing and membership card within the scope of the speed of production, why I business card printing and membership card when making a slow, Business card printing and membership card making adaptability, but when there is no problem to a certain speed increase, there is a mild trailing again a color depth of Sulci?
除上述所叙述的粘度与制卡和会员卡制作适应性外,当我们认为油墨的粘度在属于制卡和会员卡制作的速度范围内,为什么在制卡和会员卡制作速度慢时,制卡和会员卡制作适应性没有问题,而当提速到一定的情况下,就会出现轻则拖尾,重则色浓度变浅呢?
- 推荐网络例句
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The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.
此刻阴唇已经几乎完全的缝在一起了,排除多余淤血体液的管子和Foley导管从顶端冒出来。
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To get the business done, I suggest we split the difference in price.
为了做成这笔生意,我建议我们在价格上大家各让一半。
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After an hour and no pup, look for continued contractions and arching of the back with no pup as a sign of trouble.
一个小时后,并没有任何的PUP ,寻找继续收缩和拱的背面没有任何的PUP作为一个注册的麻烦。