Design of Second-Order Sliding Mode Guidance Law Based on the Nonhomogeneous Disturbance Observer by Huibo Zhou, Shenmin Song, Junhong Song, Jing Niu

“…Furthermore, the finite-time guidance law with dynamic delay characteristics is designed for the target maneuvering through adopting variable structure dynamic compensation. The simulation results demonstrate that, for different target maneuvering, the proposed guidance laws can restrain the sliding mode chattering problem effectively and make the missile hit the maneuvering target quickly and accurately with condition of corresponding assumptions.…”
Get full text

Simulation Analysis of Flow Characteristics of Improved Rectangular Throttling Groove Slide Valve Port by WU Yueneng, LI Jianying, LI Xufei, HUANG Yuxuan, LI Yueying, CHENG Luo

“…The distribution of pressure，flow velocity，flow rate and other parameters without pre opening are simulated and analyzed，and the influence of rectangular pre opening and no pre opening on the flow gain of hydraulic valve is analyzed．The simulation results show that the improved rectangular groove structure can significantly improve the internal flow field distribution ，effectively reduce the spool deformation，and improve the dynamic and static performance of the directional valve.…”
Get full text

The release of biologically hazardous chemical compounds from orthodontic adhesive systems used in Europe and in the USA — an in vitro study by Konrad Małkiewicz, Piotr Wychowański, Elżbieta Małkiewicz, Dorota Olczak-Kowalczyk, Jadwiga Turło

“…Dental materials containing polymer network based on methacrylates require structure modification or elimination of harmful components in order to increase safety of their application.…”
Get full text

Surgical treatment of a patient with pulmonary embolism after a new coronavirus infection by S. A. Fedorov, S. A. Zhurko, V. V. Pichugin, D. I. Lashmanov, M. B. Sukhova, M. L. Kalinina

“…Venous thromboembolic complications (VTC) occupy one of the central positions in the structure of complications associated with a new coronavirus infection. …”
Get full text

COMPARATIVE HISTOLOGICAL STUDY OF GILLS OF TWO SPECIES IN FRESH WATER )CYPRINUS CARPIO) AND SEA WATER FISH (OTOLITHES RUBER) OF IRAQ by Alaa A. Al-Sawad, Majdi F. Majeed, Alia M. Khuder

“…In present study investigated of the histological structure of the gills of two fish species: Cyprinus carpio and Otolithes rubber which represented fresh water and seawater fish respectively. …”
Get full text

Numerical Simulation of Diversion Tunnel Excavation Using GPU-Accelerated Anisotropic Random Fields by Guo-jin Zhu, Yu Ning, Zhi-hao Cui, Nanxiang Hu, Qing-xiang Meng, Chun Zhu

“…Based on the geological structure characteristics of red-layered soft rocks in central Yunnan, the anisotropic rock random field and tunnel excavation with different rotation angles are simulated. …”
Get full text

Non-differentiated connective tissue dysplasia. "Carthage should be destroyed"? by E. V. Zemtsovsky

“…In the last two decades, the interest in hereditary pathology of connective tissue structure and function has substantially increased in Russia. …”
Get full text

Clinical and Haemodynamic Effects of Arteriovenous Shunts in Patients with Heart Failure with Preserved Ejection Fraction by Medhat Soliman, Nizar Attallah, Houssam Younes, Woo Sup Park, Feras Bader

“…Many studies have sought to understand the effect of AVS creation or closure on heart structure and functions, most of which use non-invasive methods, such as echocardiography or cardiac MRI. …”
Get full text

A Novel Fiber-Optical Fabry–Perot Microtip Sensor for 2-Propanol by João M. Leça, Paulo Antunes, Florinda M. Costa, António J. S. Teixeira, Marta S. Ferreira

“…In this context, a novel fiber-optic Fabry–Perot (FP) interferometric sensor with a microtip structure was developed using the light-guided induced polymerization technique. …”
Get full text

Polyelectrolyte microcapsules modified with nanoscale titanium dioxide for targeted drug delivery by P. А. Demina, Е. V. Degtyareva, G. M. Kuz’micheva, T. V. Bukreeva

“…They were modified with nanoscale titanium dioxide with rutile structure and commercial Degussa P25 and Hombikat UV-100. …”
Get full text

LONG-TERM CHANGES OF GROUND FAUNA OF COASTAL ZONES OF APSHERON AND BAKU ARCHIPELAGOES ISLANDS OF CASPIAN SEA DURING 1967-2007 by R. M. Bagirov, V. R. Gourbanova

“…During 2000-2007 studying of specific structure macrozoobenthos and its quantitative distribution on islands of Apsheron and Baku archipelagoes of Caspian Sea has been spent. …”
Get full text

Wide-Angle Frequency Scanning Leaky Wave Antenna Loaded CSRR Patch Based on SSPP Transmission Line by Zihao Fu, Tianliang Zhang, Tianhai Wu, You Lan, Wenxing Huang, Leilei He

“…Wide-angle frequency scanning of the antenna is achieved by combining the slow-wave dispersion characteristics of Spoof Surface Plasmon Polaritons and the left-and-right-composite-handed characteristics of the complementary split ring resonator structure. The simulated and experimental results show that, with the increase of frequency, the radiation mode of the antenna gradually changed from slow-wave mode to fast-wave radiation mode, and the pattern changed continuously. …”
Get full text

Chemical Reduction of Nd1.85Ce0.15CuO4−δ Powders in Supercritical Sodium Ammonia Solutions by Yasmin Dias, Hui Wang, Haiqing Zhou, Feng Lin, Yucheng Lan

“…The crystallographic structure of the reduced powders is investigated from Rietveld refinement of X-ray powder diffraction. …”
Get full text

An Innovative Approach to Producing Foot and Armrest with Kente and Leather for Interior Furnishing by Abdul F. Ibrahim, Sumaila M. Sumaila, Ebenezer E. Gyamfi

“…The fabric weaving techniques generated a well-defined weave pattern which was augmented by leather material woven in twill structure and embroidery technique, good for producing foot and arm-rest for interior furnishing. …”
Get full text

Resistivity of individual fibrous aggregates of carbon nanohorns by Mayumi Kosaka, Ryota Yuge

“…The results showed that the resistivity of CNBs was 0.02 Ωcm, which is more than two orders of magnitude lower than that of CNHs, indicating that CNBs are highly conductive. CNB has a structure in which CNTs are at the center and nanohorns are aggregated around them, and our findings revealed that the nanohorn portion is the main contributor to conductivity in CNB. …”
Get full text

EXTREMELY SEVERE COURSE OF A NEW CORONAVIRUS INFECTION IN A PREGNANT WOMAN by Светлана Ивановна Елгина, Ольга Сергеевна Золоторевская, Екатерина Владимировна Грищенко, Елена Владимировна Рудаева, Кира Борисовна Мозес, Вадим Гельевич Мозес

“…RV accounts for 1 % of all cancer cases in women. In the structure of the incidence of malignant neoplasms of the female genital organs, the share of primary RV is about 2-5 %. …”
Get full text

Design of Encoding Algorithm for Underwater Wireless Optical Communication Based on Spinal Code by Xiaoyang Yu, Min Yu, Yun Zhou, Tianwei Chen

“…This paper presents the Superposition UEP-Spinal Code structure, which utilizes unequal error protection (UEP) to adjust the transmission performance of different types of information in underwater composite data communication by adjusting the superposition weighting factors in the encoding algorithm. …”
Get full text

On Viscosity and Equivalent Notions of Solutions for Anisotropic Geometric Equations by Cecilia De Zan, Pierpaolo Soravia

“…We provide examples of using the simplified definition, showing, for instance, that boundaries of strictly convex subsets in the Carnot group structure become extinct in finite time when subject to the horizontal mean curvature flow even if characteristic points are present.…”
Get full text

Effect of Solidification Cooling Rate on the Microstructure Evolution and Corrosion Resistance of 2507 Super Duplex Stainless Steel by SHEN Chu, ZOU De - ning, ZHAO Jie, CHEN Yang

“…Results showed that the content of σ phase in the samples structure increased with the decrease of solidification cooling rate, and the corrosion resistance of the samples weakened with the decrease of solidification cooling rate.…”
Get full text

Modeling, Synchronization, and FPGA Implementation of Hamiltonian Conservative Hyperchaos by Enzeng Dong, Xiaodong Jiao, Shengzhi Du, Zengqiang Chen, Guoyuan Qi

“…These Euler equations compose the conservative parts from their antisymmetric structure, which have been proved to be both Hamiltonian and Casimir energy conservative. …”
Get full text