State Estimation for Time-Delay Systems with Markov Jump Parameters and Missing Measurements

This paper is concerned with the state estimation problem for a class of time-delay systems with Markovian jump parameters and missing measurements, considering the fact that data missing may occur in the process of transmission and its failure rates are governed by random variables satisfying certain probabilistic distribution. By employing a new Lyapunov function and using the convexity property of the matrix inequality, a sufficient condition for the existence of the desired state estimator for Markovian jump systems with missing measurements can be achieved by solving some linear matrix inequalities, which can be easily facilitated by using the standard numerical software. Furthermore, the gain of state estimator can also be derived based on the known conditions. Finally, a numerical example is exploited to demonstrate the effectiveness of the proposed method

A computational study on the overload characteristic curves of projectile penetrating metal object

The paper, based on ANSYS/LS-DYNA software, made a computational study on the overload characteristic curves of projectile penetrating metal objects. Adopting Lagrange method, Lagrangian-Eulerian coupling algorithm and SPH method, respectively, simulated the over-load characteristics of projectiles penetrating single-layer steel plates and multi-layer steel and aluminum alloy plates. The results affirmed that the curves agreed well with each other. The curves reached its peak during every penetrating layer and the accelerator peak declined with layers increasing. And the overload value fluctuated around zero during the penetrating interval. The fact, gained from the velocity curves, was that it dropped gradually, however, reached a plateau during the interval, suggesting that the velocity kept constant, and overload value came to zero. The simulation and the experimental results of penetrating the multi-layer aluminum alloy plates were in well accord. Besides, the overload curves shared the same trends with penetrating the multi-layer steel plates

4-(4-Nitro­benzene­sulfonamido)pyridinium bromide

In the title compound, C11H10N3O4S+·Br−, the benzene ring makes an angle of 88.4 (2)° with the pyridinium ring. The dihedral angle between the nitro group and the benzene ring is 16.5 (2)°. The ions in the crystal structure are linked by a combination of inter­molecular N—H⋯Br and non-conventional C—H⋯Br and C—H⋯O hydrogen bonds, forming a three-dimensional network

Transflective liquid crystal display using separate transmissive and reflective liquid crystal cells and materials with single cell gap

A transflective liquid crystal display (TLCD) using separate transmissive (T) and reflective (R) cells in which two liquid crystal materials with different birefringence changes are used. The birefringence change of the R region is half of the birefringence change of the T region. In this case, a single cell gap is possible and identical transmittance and reflectance for R and T is obtained. It is applicable to various reflective LC modes, and the fabrication methods are simple

tert-Butyl N′-[4-(2-pyrid­yl)benzyl­idene]hydrazinecarboxyl­ate

In the mol­ecule of the title compound, C17H19N3O2, the aromatic rings are oriented at a dihedral angle of 3.68 (3)°. In the crystal structure, inter­molecular N—H⋯O hydrogen bonds link the mol­ecules into chains along the a axis. A weak C—H⋯π inter­action is also present