Crack of a helicopter main rotor actuator attachment: failure analysis and lessons learned by L. Allegrucci, F. De Paolis, A. Coletta, M. Bernabei

“…The accident investigation focused on main rotor oscillatory plate servo actuators . These components, directly linked to the cloche movements, regulate main rotor blades plane tilt and pitch. …”
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A secure transmission method based on cooperative jamming for correlated main and wiretap channels by Sai XU, Shuai HAN, Weixiao MENG

“…A secure transmission method was proposed based on cooperative jamming to reduce the secrecy loss caused by the correlation between main and wiretap channels and to improve the secrecy.Considering that the existing methods of cooperative jamming focused on the case of independent main and wiretap channels, the achievable secrecy performance was not satisfactory.In view of this, a cooperative jamming method for correlated main and wiretap channels was proposed.Based on the model of cooperative jamming under correlated main and wiretap channels, the secrecy rate maximization under secrecy outage constraint was formulated.Then, the norm bounding approach and the Bernstein-type inequality approach were employed to approximately transform the probabilistic constraint into a deterministic form, and a safe approximate solution of beamforming vector and AN covariance matrix was obtained.Simulation results show that the proposed method can reduce the secrecy loss under high correlation.…”
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Stenting of Anomalous Left Main Coronary Artery Stenosis in an Adult with a Retroaortic Course by Lanjewar Charan, Santosh Shiradkar, P. G. Kerkar, Agrawal Ashish

“…We are reporting an interesting case with anomalous left main coronary artery originating from right aortic sinus having retroaortic course complicated by significant atherosclerotic narrowing of the vessel and its percutaneous management.…”
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Analysis of Main Engineering and Geological Problems in Water Delivery Tunnel of Liubu'ao Reservoir by HU Kaiting, DING Rongwu

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Subversion of Immunity by Leishmania amazonensis Parasites: Possible Role of Phosphatidylserine as a Main Regulator by Joao Luiz Mendes Wanderley, Jaqueline França Costa, Valéria Matos Borges, Marcello Barcinski

“…Here we discuss the possible role of phosphatidylserine exposure by these parasites as a main regulator of the mechanism underlying subversion of the immune system at different steps during the infection.…”
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Genetic Types and Main Control Factors of Microfractures in Tight Oil Reservoirs of Jimsar Sag by Xiangye Kong, Jianhui Zeng, Xianfeng Tan, Haowei Yuan, Dan Liu, Qun Luo, Qianyou Wang, Rusi Zuo

“…In this study, rock samples from the Lucaogou Formation tight reservoirs in Xinjiang, China, were studied using multidisciplinary techniques to investigate the genetic types and main control factors of microfractures. Results indicated that the Lucaogou Formation mainly developed diagenetic microfractures followed by tectonic microfractures, with slight formations of granular microfractures. …”
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Vibration Reduction Analysis of Bearing Seat Damping Structure of Helicopter Main Reducer Casing by Hao Gao, Jianjun Yang, Hua Dai, Dingjun She

“…Aiming at the vibration and noise problem of a helicopter main reduction casing，the dynamics simulation analysis of the main reduction transmission system model is performed to solve the dynamic meshing impact force generated by the spiral bevel gear during high-speed transmission. …”
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Simulation and Experimental Study on Vibration and Noise Characteristics of the Main Reducer of an Electric Drive Axle by Cui Yue, Tian Shaopeng, Zou Lin, Wang Xinqiang

“…In this study, a simulation model of the two-stage helical gear pair-rotor-bearing of the main reducer is developed by Adams software. The simulation results show that the noise mainly comes from the resonance of the system and the contribution of the high-speed gear pair is large when the speed is in the range of 0~3 000 r/min. …”
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Ministry of Justice is the Main Subject for Implementing Public Administration in Providing Forensic Science Services by О. V. Agapova

“…The Ministry of Justice of Ukraine has been identified in the article as the main subject of public administration in providing forensic science services for justice according to the current legislation of Ukraine and the provisions of administrative science. …”
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Late and Chronic Antibody-Mediated Rejection: Main Barrier to Long Term Graft Survival by Qiquan Sun, Yang Yang

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Entretien croisé autour de la revue en ligne Les Mains Invisibles by Lisa Castro, Victoria Rimbert, Alix Kazubek

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ELECTRONIC CUSTOMS AS THE MAIN VECTOR OF CUSTOMS AUTHORITIES DEVELOPMENT IN THE CONTEXT OF DIGITALIZATION OF THE RUSSIAN ECONOMY by A. V. Sal’nikova, M. A. Chernova

“…The problems of the development of the electronic customs institute in the Russian Federation have been analysed, the main ones are the imperfection of the technologies used, the insufficient qualifications of electronic customs personnel, the imperfect mechanism of interaction between electronic customs and other elements of the system, the absence of criteria for the effectiveness of electronic customs, the theoretical foundation and the conceptual framework of the electronic customs institute. …”
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Increased Porphyrins in Primary Liver Cancer Mainly Reflect a Parallel Liver Disease by Jerzy Kaczynski, Göran Hansson, Sven Wallerstedt

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The personnel management system of the organization in the conditions of martial law and the main directions of its improvement by Anastasiia Radchenko, Oleksii Dzhusov

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Study on Main Drugs and Drug Combinations of Patient-Controlled Analgesia Based on Text Mining by Xing Jin, Ying Wu

“…In this study, text mining technology was used to analyze relevant literature, try to find out the main drugs of PCA, classify the drugs, and dig out the important drug combination rules. …”
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Mechanical Electrical Coupling Modeling and Fault Characteristic of the Main Driving System of the Annealing Kiln by Kangqu Zhou, Lei Lei, Xueming Wu, Wennan Xie, Zhiqun Kan

“…According to the fault characteristics of the Main Drive System of the Annealing Kiln（MDSAK）， the nonlinear factors such as the time-varying meshing stiffness of the gear and the time-varying stiffness of the bearing are considered synthetically， the mechanical electrical coupling dynamics model of the MDSAK including the driving motor， the gear driving system and the load system is established. …”
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Establishment of Sensory Evaluation Method for Wolfberry Tea and Exploration of the Main Characteristic Aroma Substances by Yuanchao LI, Qinji LI, Yuqiong GUO, Zhilong HAO, Shan JIN

“…Based on the physicochemical methods and gas chromatography mass spectrometry (GC-MS) technology, the difference of taste and aroma substances between buds and leaves of wolfberry tea, were analyzed, and the main characteristic aroma compounds of wolfberry tea were explored. …”
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The Procedural Difference between the Main Third-Party Intervention and Derivative in the Preliminary Stage and Reconsideration by Majid Aziziyani

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Design and Analysis of Main Drive Mechanism of the Helical Gear Shaping Machine with Adjustable Device by Xiong Xianwen, Cheng Weilin

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Research of Premature Failure of Bench Fatigue Test of the Car Aluminum Housing Main Reducer by Zhao Wenhua, Li Kai, Wang Kai

Subjects: “…Car aluminum housing main reducer…”
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