A Study on Calculation Method and Influence Factor of Critical Speed of Helicopter Tail Drive Shaft by De Ni, Cheng Duan, Miaofei Cao, Jing Wei

“…Taking the helicopter oblique tail drive shaft as the research object，and considering bending moment，lateral displacement，shear distortion，moment of inertia，gyroscopic moment and axial force，etc. a calculation model for the critical speed of the tail drive shaft is established and a calculation formula for the critical speed is derived. …”
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Review on the research of the global emergency communication spectrum by Xiaoyong LIU, Xixi FAN, Lin ZHU, Yuanxin YAO

“…The construction of an emergency private network is the necessity of unified command and dispatch communications in rescue of disasters, emergency response, and major activity safeguard.It is an important communication means of public safety protection.With the rapid development of radio technology, the traditional narrowband emergency communication system is difficult to meet the needs of multimedia data, interconnection, anti-interference and other needs under the new situation.Digitization, broadband and ubiquity have become the inevitable trend of the development of emergency private networks.First of all, the technical system and development trend of emergency communication were summarized, the global emergency communication research framework were introduced, the frequency planning and current use status of the emergency private network in the United States, Europe, Asia-Pacific and other countries and regions were analyzed.Finally, combine with the current frequency planning, suggestions for the construction of China’s emergency private network from the aspects of technology trends, industrial development, frequency band selection, and construction mode were presented.…”
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Design and Validation of a Biomimetic Leg-Claw Mechanism Capable of Perching and Grasping for Multirotor Drones by Yan Zhao, Ruzhi Xiang, Hui Li, Chang Wang, Jianhua Zhang, Xuan Liu, Yufei Hao

“…Additionally, its foldable, parallelogram-shaped legs bend under external forces, stretching the main tendon. …”
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Research on the Same Frequency Interference on EGSM Uplink Signal from CDMA Downlink Signal by Fangyuan Lei, Gang Lei

“…Final, the solution was proposed, which use deviate cell of border to carry traffic, use the clean frequency band to plan or use the 1 800 MHz frequency to carry the traffic. …”
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Classification Based Treatment of Greater Trochanteric Pain Syndrome (GTPS) with Integration of the Movement System by Ashley E. Disantis, RobRoy L. Martin

“…Greater trochanteric pain syndrome (GTPS) refers to pain in the lateral hip and thigh and can encompass multiple diagnoses including external snapping hip (coxa saltans), also known as proximal iliotibial band syndrome, trochanteric bursitis, and gluteus medius (GMed) or gluteus minimus (GMin) tendinopathy or tearing. …”
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Ferromagnetic Resonance Characterization of Nano-FePt by Electron Spin Resonance by S. S. Nkosi, H. M. Gavi, D. E. Motaung, J. Keartland, E. Sideras-Haddad, A. Forbes, B. W. Mwakikunga

“…Electron spin resonance (ESR) measurements at room temperature and X-band microwave frequency were performed on highly crystalline FePt system thin films. …”
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The Effects of Red and Blue Lights on Circadian Variations in Cortisol, Alpha Amylase, and Melatonin by Mariana G. Figueiro, Mark S. Rea

“…We utilized exposures from narrowband long-wavelength (red) and from narrow-band short-wavelength (blue) lights to more precisely understand the role of the suprachiasmatic nuclei (SCN) in these responses. …”
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柴油机卷簧扭振减振器力学模型和性质研究 by 田中旭, 陈俊豪, 蔡正祥, 汪俊, 李嘉鹏

“…Owning high reliability and excellent performance,sleeve spring-type torsional vibration dampers is often used in high-power marine diesel engine to reduce torsional vibration.However,since sleeve spring pack belongs to the large deformation and nonlinear problem of the superposed curved beam,the description of the deformation state,the change of the contact area and the limitation of the surrounding space on the deformation make the study of mechanical model very complicated.So far,there still isn’t an efficient and accurate computational method for the stiffness parameters.Therefore,the computational model of the stiffness for the dampers was studied.Based on the superposed curved beam bending models,these complex factors such as the contact between the springs,support and limit of stroke limiter were fully considered.A complete damper stiffness mechanics model and related algorithms were presented and program was made as well.Correctness of the model was verified by the method of finite element analysis.Based on this,the influence of the main design parameters of the damper on the mechanical properties was studied,which provided a basis for design of the damper.…”
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Raman Spectroscopy of Amorphous Carbon Prepared by Pulsed Arc Discharge in Various Gas Mixtures by M. Marton, M. Vojs, E. Zdravecká, M. Himmerlich, T. Haensel, S. Krischok, M. Kotlár, P. Michniak, M. Veselý, R. Redhammer

“…The change in the gas type, combination, and flow had a significant influence on the D and G bands of the a-C Raman spectra. The addition of N2 into the chamber promoted the sp2 creation, while with adding hydrogen the layer contained more sp3 bonds. …”
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Adsorption of Atenolol on Talc: An Indication of Drug Interference with an Excipient by Zhaohui Li, Nicole M. Fitzgerald, Guocheng Lv, Wei-Teh Jiang, Limei Wu

“…The Fourier transform infrared results showed blue shifts of the bands corresponding to δ(C–OH) at 1410 and 1043 cm −1 , indicating hydrogen bonding for the uptake of AT on talc surfaces or edges.…”
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Photochemical R2PI study of chirality and intermolecular forces in supersonic beam by A. Giardini Guidoni, S. Piccirillo, D. Scuderi, M. Satta, T. M. Di Palma, M. Speranza, A. Filippi, A. Paladini

“…In analogy with other diastereomeric complexes, the phenomenological binding energy of the homochiral cluster is found to be greater than that of the heterochiral one. …”
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L’appareil numérique et la perspective ou le retour des espaces projectifs en art by Michel Porchet

“…En montrant le procédé (le rush, la bande vidéo, le programme), il interroge les manipulations du temps et de l’espace propres au film, celles de la vidéo, puis l’immersion des univers virtuels, qu’il distingue des installations. …”
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Optimal Evaluation of the Rheological Parameters for STF Dampers in Semi-Rigid Joints of Steel Structures Using Response Surface Method by Ruby Freya, R. Senthil

“…Series of cyclic loading were imposed on the frames equipped with STF dampers to assess their impacts on T-steel frames. The stiffener end plate is bolted over the corner of the joints that are subjected to bending moment. …”
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Effect of Moisture Content on Mechanical Properties of AAM Natural Fiber-Reinforced Isophthalic Polyester Composites by T. Ramakrishnan, S. Senthil Kumar, Samson Jerold Samuel Chelladurai, S. Gnanasekaran, N. K. Geetha, Ramesh Arthanari, Baru Debtera

“…Additionally, the experimental evidence demonstrates that increasing the volume fraction helps to increase the tensile, bending, and modulus of the AAM fiber composite. The chopped fiber isophthalic polyester reinforcement reaches its improved tensile strength and modulus at a 25% Vf about the 20 mm length of the fiber.…”
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Algorithm and Experimental Study of Circular Omnidirectional Focused Wave Synthesis for Extreme Wave Simulation by NI Yiping, WANG Tianyi, WANG Lei, LIN Jun, CHEN Jun, GUO Zebin

“…To reproduce extreme focused waves,based on the traditional two-dimensional double superposition focusing method,the spectral peak frequency,frequency band and wave amplitude distribution method have been improved,and a circular omnidirectional focused wave synthesis algorithm has been innovatively developed.The algorithm achieves the simulation of extreme focused waves and graphic focused waves,such as single-peaked focused waves,double-peaked focused waves,eccentric focused waves,rotating focused waves,and D-shaped focused waves.It is also capable to accurately control the focal position,height,diameter,verticality and other wave forms.Moreover,it can simulate strong nonlinear waves such as generating up jets with a height of up to 10 m and an impulse velocity of 13.8 m/s.In addition,the algorithm has the ability to simulate conventional waveforms,including rotating waves,standing waves and other regular waves,to fulfill the demand of traditional wave tests.…”
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Damage severity for cracked simply supported beams by Ehab Samir Mohamed Mohamed Soliman

“…Modal and harmonic vibration analysis of intact and damaged beam were performed in order to extract mode shapes of bending vibration, natural frequencies and obtain frequency response diagram. …”
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Effect of fermentation duration on microstructure and quality of acha flour and its cookies acceptability by Sunday Samuel Sobowale, Benjamin Oluwole Omotoso, Joy Ikedichi Agbawodike

“…The Fourier transform infrared (FTIR) spectra increased the band intensities (3860–3650 cm− 1). XRD patterns revealed slightly higher crystallinity, with A-type for flour and V-type for cookies. …”
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An Unconventional Approach for Analyzing the Mechanical Properties of Natural Fiber Composite Using Convolutional Neural Network by Govindaraj Ramkumar, Satyajeet Sahoo, G. Anitha, S. Ramesh, P. Nirmala, M. Tamilselvi, Ram Subbiah, S. Rajkumar

“…The mechanical properties such as rigidity, effects, bending, and tensile testing are carried out on natural fiber composites. …”
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Low-Cost Printed Flexible Antenna by Using an Office Printer for Conformal Applications by Kashif Nisar Paracha, Sharul Kamal Abdul Rahim, Hassan Tariq Chattha, Saqer Saleh Aljaafreh, Sabih ur Rehman, Yew Chiong Lo

“…The printed antenna is also tested in bending conditions to ascertain its performance for the Internet of things (IoT) conformal applications for the future 5G network.…”
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Mesoscopic Finite Element Modeling of Concrete Considering Geometric Boundaries of Actual Aggregates by Hao Jin, Yuliang Zhou, Binglong Wang, Shunhua Zhou

“…Using this method, numerical uniaxial tensile and three-point bending beam tests are conducted and the results are compared with the round aggregate model. …”
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