809 research outputs found
Stellar Parameters and Chemical Abundances of G Giants
We present basic stellar parameters of 99 late-type G giants based on high
resolution spectra obtained by the High Dispersion Spectrograph attached to
Subaru Telescope. These stars are targets of a Doppler survey program searching
for extra-solar planets among evolved stars, with a metallicity of
-0.8<[Fe/H]<+0.2. We also derived their abundances of 15 chemical elements,
including four -elements (Mg, Si, Ca, Ti), three odd-Z light elements
(Al, K, Sc), four iron peak elements (V, Cr, Fe, Ni), and four neutron-capture
elements (Y, Ba, La, Eu). Kinematic properties reveal that most of the program
stars belong to the thin disk.Comment: 21 pages, 15 figures, PASJ accepte
Distributed Control of Multi-agent Systems with Unknown Time-varying Gains: A Novel Indirect Framework for Prescribed Performance
In this paper, a new yet indirect performance guaranteed framework is
established to address the distributed tracking control problem for networked
uncertain nonlinear strict-feedback systems with unknown time-varying gains
under a directed interaction topology. The proposed framework involves two
steps: In the first one, a fully distributed robust filter is constructed to
estimate the desired trajectory for each agent with guaranteed observation
performance that allows the directions among the agents to be non-identical. In
the second one, by establishing a novel lemma regarding Nussbaum function, a
new adaptive control protocol is developed for each agent based on backstepping
technique, which not only steers the output to asymptotically track the
corresponding estimated signal with arbitrarily prescribed transient
performance, but also largely extends the scope of application since the
unknown control gains are allowed to be time-varying and even state-dependent.
In such an indirect way, the underlying problem is tackled with the output
tracking error converging into an arbitrarily pre-assigned residual set
exhibiting an arbitrarily pre-defined convergence rate. Besides, all the
internal signals are ensured to be semi-globally ultimately uniformly bounded
(SGUUB). Finally, simulation results are provided to illustrate the
effectiveness of the co-designed scheme
ΠΡΠ»ΡΡΡΡΠ½Ρ ΠΎΡΠΎΠ±Π»ΠΈΠ²ΠΎΡΡΡ ΠΊΠΈΡΠ°ΠΉΡΡΠΊΠΎΠ³ΠΎ ΡΠ°Π΄ΠΆΠΈΡΡΠΊΠΎΠ³ΠΎ ΠΊΠΎΡΡΡΠΌΡ
The article selects Chinese Tajik costume as the research object. Using the methods of literary research and induction, a systematic analysis of the historical origin of the Tajik costume and the reasons for the formation of the costume culture was performed. This provides support for the innovative application of Tajik costume elements in modern fashion design.ΠΠ±βΡΠΊΡΠΎΠΌ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Π½Ρ ΠΎΠ±ΡΠ°Π½ΠΎ ΠΊΠΈΡΠ°ΠΉΡΡΠΊΠΈΠΉ ΡΠ°Π΄ΠΆΠΈΡΡΠΊΠΈΠΉ ΠΊΠΎΡΡΡΠΌ. ΠΠ΅ΡΠΎΠ΄Π°ΠΌΠΈ Π»ΡΡΠ΅ΡΠ°ΡΡΡΠ½ΠΎΠ³ΠΎ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Π½Ρ ΡΠ° ΡΠ½Π΄ΡΠΊΡΡΡ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΎ ΡΠΈΡΡΠ΅ΠΌΠ½ΠΈΠΉ Π°Π½Π°Π»ΡΠ· ΡΡΡΠΎΡΠΈΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΡ
ΠΎΠ΄ΠΆΠ΅Π½Π½Ρ ΡΠ°Π΄ΠΆΠΈΡΡΠΊΠΎΠ³ΠΎ ΠΊΠΎΡΡΡΠΌΠ° ΡΠ° ΠΏΡΠΈΡΠΈΠ½ ΡΠΎΡΠΌΡΠ²Π°Π½Π½Ρ ΠΊΠΎΡΡΡΠΌΠ½ΠΎΡ ΠΊΡΠ»ΡΡΡΡΠΈ. Π¦Π΅ Π·Π°Π±Π΅Π·ΠΏΠ΅ΡΡΡ ΠΏΡΠ΄ΡΡΠΈΠΌΠΊΡ ΡΠ½Π½ΠΎΠ²Π°ΡΡΠΉΠ½ΠΎΠ³ΠΎ Π·Π°ΡΡΠΎΡΡΠ²Π°Π½Π½Ρ Π΅Π»Π΅ΠΌΠ΅Π½ΡΡΠ² ΡΠ°Π΄ΠΆΠΈΡΡΠΊΠΎΠ³ΠΎ ΠΊΠΎΡΡΡΠΌΠ° Π² ΡΡΡΠ°ΡΠ½ΠΎΠΌΡ Π΄ΠΈΠ·Π°ΠΉΠ½Ρ ΠΎΠ΄ΡΠ³Ρ
Synthesis, properties, and optical applications of noble metal nanoparticle-biomolecule conjugates
Noble metal nanoparticles, such as gold or silver nanoparticles and nanorods, exhibit unique photonic, electronic and catalytic properties. Functionalization of noble metal nanoparticles with biomolecules (e. g., protein and DNA) produces systems that possess numerous applications in catalysis, delivery, therapy, imaging, sensing, constructing nanostructures and controlling the structure of biomolecules. In this paper, the recent development of noble metal nanoparticle-biomolecule conjugates is reviewed from the following three aspects: (1) synthesis of noble metal nanoparticle-biomolecule systems by electrostatic adsorption, direct chemisorption of thiol derivatives, covalent binding through bifunctional linkers and specific affinity interactions; (2) the photonic properties and bioactivation of noble metal nanoparticle-biomolecule conjugates; and (3) the optical applications of such systems in biosensors, and medical imaging, diagnosis, and therapy. The conjugation of Au and Ag nanoparticles with biomolecules and the most recent optical applications of the resulting systems have been focused on
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