为现场
发表于 2025-3-25 05:19:14
Jiajun Zhaone 12, 1967. The objective of this Summer School was to review the state of the art and the prospects for the application of the mathematical theory of systems to the study and the solution of economic problems. Particular emphasis was given to the use of the mathematical theory of control for the s
明智的人
发表于 2025-3-25 10:43:45
Jiajun Zhaoat the value of the state at a given point be independent of the path from the origin chosen to arrive at the given point leads to nontrivial consistency conditions: the transient evolutions (i.e., state evolution with zero inputs) should commute, and the input signal (and then also the output signa
裙带关系
发表于 2025-3-25 12:32:41
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表状态
发表于 2025-3-25 17:57:01
ies, and a general vocabulary..Contributes to a geography of.This work offers a re-edition of twelve mathematical tablets from the site of Tell Harmal, in the borders of present-day Baghdad. In ancient times, Tell Harmal was Šaduppûm, a city representative of the region of the Diyala river and of th
endarterectomy
发表于 2025-3-25 22:29:12
Introduction,lusion, focusing, etc. Among various schemes proposed to manipulate the light, the generalized Snell’s law has recently been reformulated (Yu et al. Science 334(6054):333–337, 2011 [.]). This mechanism opens up new initiatives in realizing negative reflection and negative refraction, as well as othe
大看台
发表于 2025-3-26 00:34:47
Manipulating Acoustic Wavefront with Metasurface of Inhomogeneous Impedance,ce (SAI) inhomogeneity and discontinuity, rather than the phase inhomogeneity in terms of wave propagation (Sundar et al., Opt Lett 34(3):374–376, 2009, [.], Yu et al., Science 334(6054):333–337, 2011, [.]). SAI is one of the acoustic properties of materials, which is comparably more possible to be
碳水化合物
发表于 2025-3-26 08:03:50
Redirecting Acoustic Waves Out of the Incident Plane,e theoretical modeling and the numerical experiment. We theoretically demonstrate that in fluids, extraordinarily reflected sound waves can be achieved along a three-dimensional spatial angle out of the incident plane by manipulating the impedance distribution of a flat metasurface reflector. In par
Generalize
发表于 2025-3-26 09:02:48
Manipulating Acoustic Focus with an Active Metasurface Piezoelectric Transducer,in layer compared to the scale of the entire device. The active planar interface also extends the knowledge of acoustic metasurface engineering for the deflection of sound beams using passive elements (Li et al., Sci Rep 3:2546, 2013, [.], Zhao, Appl Phys Lett 103(15):151604, 2013, [.]). Through the
synchronous
发表于 2025-3-26 16:10:25
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厌倦吗你
发表于 2025-3-26 19:36:09
Future Work,tasurface) and acoustic metastructure, in order to manipulate sound properties as much as we want (sound wavefront, vibrational orientation, acoustic focusing, and density-near-zero property). We also have demonstrated many novel acoustic applications on the basis of our designs, such as acoustic il