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Summary MitoFlex is a linux-based mitochondrial genome analysis toolkit, which provides a complete workflow of raw data filtering, de novo assembly, mitochondrial genome identification and annotation for animal High Throughput Sequencing data. The overall performance was compared between MitoFlex and its analogue MitoZ, in terms of protein-coding gene recovery, memory consumption and processing speed. Availabilityand implementation MitoFlex is available at https://github.com/Prunoideae/MitoFlex under GPLv3 license. Supplementary information Supplementary data are available at Bioinformatics online. [ABSTRACT FROM AUTHOR]

For drag and heat flux reduction, many strategies equipped with jets have got lots of attentions recently. However, the establishment process of jet flow still remains unclear. In this investigation, an in-house code was developed to simulate the establishment process of spiked lateral jet flow and to uncover flow mechanisms. Firstly, code verification and validation were performed. Then the establishment process of spiked lateral jet in hypersonic flows is thoroughly investigated. Besides, some factors influencing the establishment process of spiked lateral jet are also explored. The results showed that the establishment process of spiked lateral jet in hypersonic flows is a strong transient process and contains complex flow phenomena. During the whole process, the aerodynamic drag firstly drops and then rises accompanying by fluctuation to a stable value. Increasing the lateral jet pressure would lead to severer interaction between the lateral jet and blunt body resulting in more dramatic fluctuation of aerodynamic drag. Besides, for fixed lateral jet pressure, longer spike is recommended. The transient flow structure is highly dominated by the lateral jet location and proper lateral jet location can decrease the fluctuation of aerodynamic drag during the establishment process of spiked lateral jet in hypersonic flows. [ABSTRACT FROM AUTHOR]

Abstract: This paper examines the hypotheses that liquidity improves corporate governance, and better governance enhances valuation of Russian firms. We find a positive causal relationship between measures of liquidity and corporate governance. Additionally, we document the strong positive impact of corporate governance on valuation. Our results are economically significant. For example, we document that a 10% decrease in the proportion of zero return days implies a 0.34% increase in transparency and disclosure, which in turn leads to a 9.6% increase in firm valuation. Our research findings shed light on the important role of liquidity in improving corporate governance and valuation. [Copyright &y& Elsevier]

A pressure control method that incorporates parameter adaptation has been devised for the pressure control system of pintle solid rocket motors, which exhibit notable nonlinearities and uncertainties in parameters. Firstly, the mathematical relationship between pressure and pintle displacement is derived using the zero-dimensional interior ballistic model., and the state space equation is deduced by incorporating the dynamics of motor inertia load. Secondly, by capitalizing on the robustness of robust control, the parameter identification capabilities of adaptive control, and the rigor of Lyapunov stability theory, the proposed approach enables precise control of the pintle position while effectively addressing uncertainties, thereby enhancing the overall performance and stability of the system. Finally, the aforementioned theoretical framework has been validated through rigorous numerical simulations. The findings demonstrate a notable enhancement in the pressure response speed of the adaptive robust controller, with improvements of 10.01 % and 13.16 %, 0.03 % and 1.54 %, 0.06 % and 22.39 % in different orders of magnitude of free volume as compared to the robust controller and PID controller, respectively. Moreover, it is evident that the adaptive robust controller relies on the accuracy of the model. The applied controller demonstrates notable advantages in terms of stability, robustness, and accuracy, thereby substantially enhancing the overall performance of the pressure control system. • The state space equation for the pressure of the pintle solid rocket motors is derived. • The pressure dynamics equation and the motor inertial load equation are combined. • An adaptive robust controller with respect to pressure is designed. • The controller response laws for various free volumes, pressure index and characteristic velocity are obtained. • The adaptive robust controller exhibits a higher dependence on model accuracy is observed. [ABSTRACT FROM AUTHOR]

In order to gain insight into aluminum agglomeration behaviors and agglomeration processes, the aluminized fuel-rich propellants in solid fuel ramjet are investigated by using sampling method followed by scanning electron microscopy and laser scattering experimental technique on the small-scale combustion experimental system and connected-pipe experimental system. It is observed that the aluminum particles would break away from the burning surface after agglomeration, and interpocket agglomeration occurred. Under different ambient pressures, the microstructure of the combustion products and the aggregation behavior of aluminum particles are further analyzed. Based on the classical pocket theory and particle size analysis experiments, a new agglomeration size prediction model is established. It can be used to predict the agglomeration size on the burning surface. Compared with the empirical model and the typical pocket model, this model is in good agreement with the experimental results. A connected-pipe experimental system for solid fuel ramjet is established. The effects of inlet air temperatures on the combustion performance of ramjet, the microstructure and agglomeration size are studied. With the increase of inlet air temperature, the agglomeration size decreases, the pressure, temperature and thrust in the combustion chamber increase, which makes the propellant burn more fully. The characteristic velocity, specific impulse and combustion efficiency of the solid fuel ramjet increase. [ABSTRACT FROM AUTHOR]