Procedure for improving wildfire simulations using observations

This report suggests a variational update method for improving wildfire simulations using observations as feedback to update information. We first assume a onedimensional fire model for simplicity and present numerical simulations obtained in this case. As possible alternative approaches, we also discuss two other update methods: a particle filter method and an optimal control method

Electronic Structure and Energy Band of IIIA Doped Group ZnO Nanosheets

The electronic and magnetic properties of IIIA group doped ZnO nanosheets (ZnONSs) are investigated by the first principles. The results show that the band gap of ZnO nanosheets increases gradually along with Al, Ga, and In ions occupying Zn sites and O sites. The configuration of Al atoms replacing Zn atoms is more stable than other doped. The system shows half-metallic characteristics for In-doped ZnO nanosheets

3-Nitro-2-phenyl­chroman

In the title compound, C15H13NO3, the dihedral angle between the two aromatic rings is 79.25 (16)°

Diphenyl chloro­thio­phospho­nate

The complete mol­ecule of the title compound, C12H10ClO2PS, is generated by crystallographic mirror symmetry, with the P, S and Cl atoms lying on the mirror plane. The resulting PO2SCl tetra­hedron is significantly distorted [O—P—O = 96.79 (9)°]. The crystal packing exhibits no directional inter­actions

A Continuous Dual-Axis Atomic Interferometric Inertial Sensor

We present an interferometric inertial sensor that utilizes two counter-propagating atomic beams with transverse two-dimensional cooling. By employing three parallel and spatially aligned Raman laser beams for Doppler-sensitive Raman transitions, we successfully generate inertia-sensitive Mach-Zehnder interference fringes with an interrogation length of $2L=54\,\rm{cm}$. The measured rotation and acceleration sensitivities are $0.25\,(\mu\rm{rad/s})/\sqrt{Hz}$ and $0.12\,\rm{m}\textit{g}/\rm{\sqrt{Hz}}$, respectively. The sensor's capability to measure rotation and acceleration simultaneously in dynamic environments is validated through comparative analysis with classical sensors under force oscillation in different directions. Additionally, we conduct experiments on a turntable to calibrate the gyroscope's scaling factor and address nonlinearity.Comment: 8 pages, 4 figure

Bis(μ-biphenyl-2,2′-dicarboxyl­ato)bis­[aqua­(2,2′-bipyridine)cadmium(II)]

In the centrosymmetric dinuclear mol­ecule of the title compound, [Cd2(C14H8O4)2(C10H8N2)2(H2O)2], the Cd2+ ion is coordinated by three O atoms from two different diphenyl­dicarboxyl­ate (dpa) ligands (one O,O′-bidentate and one monodentate), a chelating bipyridine ligand and a water mol­ecule, generating an extremely distorted trigonal-prismatic (or irregular) CdN2O4 coordination geometry for the metal ion. The bridging ligands generate an 18-membered ring, which is stabilized by two pairs of intra­molecular O—H⋯O hydrogen bonds