bluuebunny/crossref_metadata_2025 huggingface dataset:
ПРОАКТИВНА АДАПТИВНІСТЬ І СИСТЕМНІ ВЛАСТИВОСТІ ПІДПРИЄМНИЦЬКИХ СТРУКТУР ЯК ДЕТЕРМІНАНТИ ЇХ СТРЕСОСТІЙКОСТІ ТА КОНКУРЕНТОСПРОМОЖНОСТІ
Authors: СТАДНИК Валентина , ЙОХНА Віталій , ГАДЖУК Максим , РОМАНІВ Руслан
Published: October 2023

У статті актуалізовано проблему здатності України підтримувати економічне життя під час війни і відновити позитивну економічну динаміку в післявоєнний період. Висловлено припущення, що важливе місце у цих процесах має зайняти підприємницький сектор – завдяки високим адаптивним властивостям підприємницьких структур малого організаційного формату. Наведено результати порівняльного аналізу статистичної інформації про зміни в структурі і економічній динаміці сектору малого і середнього бізнесу України під час війни, які підтверджують їх високу адаптивність. Аргументовано доцільність методологічного уточнення дефініції «підприємницька структура» з урахуванням чинників проактивної адаптивності.  Метою дослідження визначено сутнісно-ідентифікуючий аналіз системних властивостей підприємницьких структур, які забезпечують їх проактивну адаптивність.

Опираючись на  антисипативний підхід в теорії менеджменту, який апелює до проактивної адаптивності підприємництва як явища, запропоновано авторське тлумачення дефініцій «стресостійкість» і «конкурентоспроможність» суб’єктів підприємницької діяльності та змісту системних властивостей підприємницьких структур. Вони подані через визначення їх ролі у формуванні конкурентних переваг в контексті забезпечення стресостійкості і конкурентоспроможності бізнесу. Сукупність властивостей структуровано за їх сутнісним призначенням та результатами прояву в системних характеристиках і наповнено методичним інструментарієм управлінського впливу. Акцентовано на необхідності їх цілеспрямованого використання для вирішення завдань нарощування ринкових можливостей малих підприємств.
Peran Serta Masyarakat dalam Penyusunan Analisis Mengenai Dampak Lingkungan Dalam Rangka Perlindungan Hak atas Lingkungan Hidup
Authors: Delyarahmi Sucy , Murniwati Rahmi
Published: October 2023

Analisis Mengenai Dampak Lingkungan (AMDAL) merupakan langkah preventif untuk mencegah kerusakan lingkungan sekaligus prasyarat untuk mendapatkan izin lingkungan. Namun penyusunan AMDAL ini seringkali menimbulkan polemik, terlebih terhadap transparansi serta partisipasi masyarakat dalam penyusunannya. Jika kita menilik kepada Prinsip 10 Deklarasi Rio 1992 disebutkan istilah participatory right yang menegaskan hak untuk mendapatkan informasi dan hak berperan serta dalam pengelolaan lingkungan hidup. Kemudian, pada Undang-Undang Nomor 32 Tahun 2009 tentang Perlindungan dan Pengelolaan Lingkungan juga mengakui peran serta dari masyarakat dalam hak atas lingkungan. Tujuan dari penelitian ini untuk mengetahui problematika dalam peran serta masyarakat dalam proses penyusunan AMDAL sehingga dapat terwujudnya Perlindungan Hak Atas Lingkungan Hidup bagi masyarakat. Pertentangan perihal transparansi dan partisipasi masyarakat dengan membandingkan terhadap hak atas lingkungan terlebih kepada hak akses informasi dan hak berperan serta. Proses penelitian ini akan menggunakan metode yuridis normatif, dengan pendekatan statute approach dan conceptual approach. Hadirnya penelitian ini diharapkan dapat memberikan pemahaman terhadap pentingnya transparansi dan partisipasi dari masyarakat dalam penyusunan AMDAL.
Study on Tensile Strength of High-Density Polyethylene/Polyethylene Terephthalate Blend
Authors: Hieu Dang Minh , Thong Nguyen Tien , Le Le Thi My , Nga Pham Thi Hong , Thanh Nguyen Chi , Trung Huynh Hoang
Published: October 2023

This paper studies and evaluates the mechanical properties of a blend of Polyethylene terephthalate (PET) and high-density polyethylene (HDPE). The HDPE/PET blends are prepared by injection molding PET into HDPE with a ratio of 0%, 10%, 20%, and 30%, respectively. After the injection molding, the samples are measured for tensile strength according to standard D638. As a result, the tensile values of HDPE/PET gradually decreased with the ratio of 0%, 10%, 20%, and 30% (PET) and 18.45, 17.31, 15.45, and 14.43 MPa, respectively. It was shown that the tensile strength of the HDPE/PET composite decreased gradually as the PET percentage increased because the penetration of PET in the HDPE structure increased the elastic modulus of the PET ratio, leading to a decrease in tensile strength. The packaging is known to be mostly blown from HDPE, which has many outstanding features. However, some disadvantages exist, such as low bending strength, low heat distortion temperature, low transparency, and, most importantly, packaging. The packaging blown from HDPE is unstable. This problem is a limited application of HDPE in the packaging industry. To improve the recycling of plastic packaging from HDPE, adding PET is the most effective way. PET plastic packaging is transparent, flexible, toxic, and difficult to recycle, so it can only be used once. Incorporating PET into HDPE will improve the transparency and mechanical properties of HDPE and reduce the cost of PET plastic, and reduce environmental pollution.
Comparative Studies of V1-xCrxN Films Deposited by Conventional Magnetron Sputtering and Plasma Enhanced Magnetron Sputtering
Authors: Zhai Yanan , Fu Zhiqiang , Yue Wen , Kang Jiajie , Zhu Lina , Lu Shuo
Published: October 2023

V1-xCrxN films were deposited via conventional magnetron sputtering (CMS) and plasma enhanced magnetron sputtering (PEMS) by controlling the power of Cr target and V target. The microstructure of films was characterized using scanning electron microscope, meanwhile, the thickness was measured. The chemical composition was analyzed by an energy dispersive spectrometer, and phase structure was analyzed by X-ray diffractometer. The hardness and Young’s modulus of films were evaluated using nano-indenter. With an increase in Cr content, the deposition rate increased gradually and then reduced in both V1-xCrxN films. As Cr content increased, CMS-V1-xCrxN films transformed from a mixture of FCC-V(Cr)N and FCC-VN with non-stoichiometric ratio to a mixture of FCC-V(Cr)N and BCC-Cr, and Cr content had no effect on the phase structure of PEMS-V1-xCrxN films, all of them shown FCC-V(Cr)N. In addition, the dominant texture in V1-xCrxN films deposited by CMS and PEMS were (111) and (200). As increasing Cr content, the density of the CMS-V1-xCrxN films increased gradually, moreover, all films were loose and porous. However, the Cr content had little effect on microstructure of PEMS-V1-xCrxN films, all of which shown dense columnar structure. With the increase of Cr content, the hardness and Young’s modulus of CMS-V1-xCrxN films increased gradually and then decreased, while which in PEMS-V1-xCrxN films were rise. The doping of Cr significantly improves the structure and mechanical properties of CMS-V1-xCrxN films. Furthermore, the structure of PEMS-V1-xCrxN films is much denser, and the mechanical properties of PEMS-V1-xCrxN films are significantly better than CMS-V1-xCrxN films.
A Continuum-Based Degenerated Shell Element and Its Application on the Creep Deformation Analysis of Cladding
Authors: Zhang Ming , Chen Zhongcun , Zhu Yanan , Lu Yong , Liu Xiaohan , Jin Xin , Li Jinggang , Luo Yayun
Published: October 2023

Creep deformation is of vital importance on the thin-walled tube structure under external loadings, such as in-service cladding tubes. To improve the efficiency and accuracy of the creep deformation computation of the cladding tube, a novel continuum-based degenerated 5 degree of freedom (DOF) shell element is developed based on the continuum mechanics and finite element method. The degenerated shell element is implanted in the self-developed software BINE 2.0. The results of BINE 2.0 showed well agreement with commercial finite element software ABAQUS and analytical results. The ovality of the cladding middle section increases slowly at the beginning of the life and increases fast at the end of life until collapse due to the thermal and irradiation creep effect. The continuum-based shell element can be applied to the creep analysis of the cladding tubes of the nuclear reactor.
Study on Notched Tensile Properties of 20CrNiMo Steel
Authors: Feng Wei , Xu Zhilong , Ren Yongzhen , Chen JunYing , Fang Fang
Published: October 2023

The mechanical properties of 20CrNiMo steel and the effects of notch with different fillet radii on tensile properties and tensile fracture morphology were studied by tensile tests on smooth specimens and notch specimens with different fillet radii. The results show that the 20CrNiMo steel has high strength, high toughness and high plasticity. The stress concentration and strain concentration at notch root can improve the yield strength and tensile strength of the material, but reduce its plasticity. The material has a good resistance to notch embrittlement. The notch sensitivity coefficient is greater than 1, and it is not sensitive to notch. The macro fracture of smooth specimens is cup-cone shape, and fiber region, radiation region, shear lip can be seen. The micro fracture morphology is dimple shape, showing good plasticity. The cracking of notched samples originated from a certain distance from the bottom of the notched samples, and the periphery expanded in a “radial” pattern. The micro-section morphology showed dimple and quasi-cleavage composite fracture, and the notched samples suffered from brittle transgranular fracture under tensile stress.
Crack Failure Analysis of Stainless Steel Seamless Pipe
Authors: Yu Ting , Zhang Fang , Zhao Li , Lu Xianjin , Xie Shijie
Published: October 2023

Stainless steel pipe is widely used in machinery manufacturing industry, mainly used as steam, liquefied natural gas, natural gas, various petroleum products transmission pipeline. China is the largest consumer of stainless steel tube in the world, and in recent years the total consumption of stainless steel accounted for more than 20% of the total consumption in the world. Stainless steel pipe has good mechanical properties and good corrosion resistance, so it is widely used in the ocean engineering and shipbuilding industry, which is widely used in offshore oil and gas fields, deep water pumps, offshore drilling platforms, seabed mining devices, warships and other aspects. In this paper, the leakage of stainless steel seamless steel pipe used by a company is studied to discuss the failure behavior of stainless steel seamless steel pipe. The microstructure analysis shows that the fracture surface has the characteristics of stress corrosion crack. Chemical composition analysis, chemical composition of the sample GB/T 13296-2013 “Seamless Stainless Steel Tubes for Boilers and Heat exchangers” requirements for S31708 stainless steel; SEM and EDS detection: the corrosion products of seamless steel pipe fracture and the scale composition in the tube were detected. The corrosive medium Cl was found in the scale composition detection, and no obvious corrosive medium was found in the corrosion products of the fracture surface.
Study of New Materials for Controlled Grouting Reinforcement
Authors: Ding Qing , Ren Huimin , Xu Dabin , Du Guilin , Yang Pengcheng
Published: October 2023

In practice, wet and submerged repair and reinforcement is often encountered, such as damage to tunnels due to wear and tear and water erosion, leakage in concrete diversion channels, etc. Due to the presence of large amounts of water in the environment, it is very difficult to achieve dry conditions for repair and reinforcement of such structures, which often requires wet or submerged construction. In addition, dams are subject to cracks and surface peeling in submerged concrete or reinforced concrete due to the complex environment they have been in for a long time, and concrete is also subject to pressure water due to dam storage. Conventional repair materials pursue high groutability, good flowability of the slurry but it is extremely easy to disperse when it encounters water scouring, failing to achieve the effect of grouting, wasting material seriously and washing away lost material will also cause pollution to the environment. As the mountain is relatively fragmented, the grouting process consumes a large amount of grout, so it is necessary to keep the grouting within certain limits. Therefore, the specific grouting construction conditions also place special requirements on the grouting material, towards the need for grouting material to meet the premise of groutability and mechanical properties, but also the need to meet the construction requirements of underwater or moving water conditions, as well as the control requirements of the grout flow range. This paper introduces a controlled grouting material which, by regulating the setting time and viscosity of the material, allows the grouting material to be well adapted to grouting under local subsurface moving water conditions.
Experimental Study on Performance Improvement of Lithium Nickel Manganate High Voltage Cathode Material
Authors: Jia Guorui , Liu Chen , Wang Jianbi , Zou Daijiang
Published: October 2023

The development of high-voltage electrolyte system is a key factor in the commercialization of high-voltage spinel lithium nickel manganese oxide (LNMO) battery materials. This article carries out the optimization and exploration of LiBOB electrolyte additives in high voltage LNMO cathode materials. The test results show that the performance is best when the electrolyte is added at 30–50 μL. In order to study the mechanism of LiBOB on the LNMO anode, combining the characterization results of XRD, XPS, IR, Raman, and electron microscopy, it can be seen that LiBOB is preferentially oxidized and a layer of boron-rich CEI film with a thickness of about 8 nm is formed on the surface of the LNMO anode. This passivation film physically blocks the contact between the electrolyte and the surface of the highly active electrode, maintains the stability of the LNMO structure under high voltage, and improves the electrochemical performance.
Effect of SO2 on NO Reduction Using Biomass Char
Authors: Li Nan , Wang Yali , Cui Suping , Zhang Wu , Zhao Kaosheng
Published: October 2023

In this paper, a fixed bed reactor was used for investigating the effect of SO2 on NO reduction using biomass char made of rice husk at a temperature of 900°C, with an inlet SO2 concentration ranging from 400 to 2000 ppm. The adsorption and desorption experiments with NO, SO2 and NO+SO2 on char were performed in the same reactor for a more detailed analysis. The results suggested that SO2 showed an negative impact on NO reduction by biomass char, which can be mainly attributed to a better adsorption performance of SO2 on the biomass char than that of NO and a strongly depressed behavior of SO2 on NO adsorption by competing for the same char surface active adsorption sites. However, the negative effect of SO2 could get weaken with the increased SO2 concentration. Partially explaining the situation was the increased proportion of the char surface carbon-oxygen complexes that can accelerate the production of CO with the presence of SO2.
Investigation of Luders Band Defects in Cold Rolling of Ferritic Stainless Steel Sheet Surface
Authors: Akgun Caner Can , Erturk A. Tamer , Karabay Sedat
Published: October 2023

The production lines of the Iron and Steel Industry can realize high quality, high speed, and punctual production thanks to the harmonious coordination of various equipment and systems. However, due to the numerous variables arising from feedstock, machinery, or operators, productivity can decrease, resulting in poor-quality products and, eventually, a loss of profitability, which can even lead to a shutdown of the business. Therefore, it is crucial for production lines affected by multiple variables to continuously analyze and optimize these factors in order to improve efficiency and maintain competitiveness. This paper aims to focus specifically on the effect of Luders Bands on the surface of rolled sheets in a stainless steel sheet cold rolling mill, providing a practical application to the existing body of knowledge. Luders Bands are elongated plastic deformation zones that can form on the surface of rolled sheets during the cold rolling process. They can significantly impact the quality and appearance of stainless steel sheets, leading to customer dissatisfaction and potential product rejection. By investigating and clarifying the impact of Luders Bands, this study aims to contribute to the understanding of this phenomenon and provide valuable insights for process optimization. The paper will propose potential strategies and techniques to mitigate or eliminate Luders Bands, thereby improving the overall quality of the rolled sheets.
Analysis of Heat Dissipation and Static Characteristics of Coaxial Magnetic Gear Hub Motor
Authors: Li Jianying , Lan Yunfeng
Published: October 2023

According to a certain vehicle parameters and actual working conditions, a coaxial magnetic gear hub motor was designed. The motor was compared and analyzed without cooling and with cooling system. At the same time, in order to meet the mechanical performance and lightweight design of the material, the static characteristics of the coaxial magnetic gear hub motor parts is comparative analyzed which is selected 45# steel and ZL101. The research shows that the armature without any cooling type can not be dissipated due to heat, so that the whole motor works in the high temperature environment. If the circulating water-cooled armature is used, most of the armature can be well cooled. Compared with 45# steel, ZL101 is selected as the material of the coaxial magnetic gear hub motor, in addition to meeting the requirements of mechanical properties, it can also meet the requirements of light weight.
Failure Analysis of Fixed Crane Boom Fracture
Authors: Shi Hongjun
Published: October 2023

This paper takes a fixed crane jib fracture failure accident as the research object, analyzed and calculated the force of the jib under different operating conditions by measuring the relevant data at the time of the accident, discussed the possibility of overload caused by the different distribution of the crane grab in the operating area of the cabin due to operating factors, and carried out the macro and micro failure test analysis of the jib fracture. The results show that under the action of alternating load, the manufacturing defects of the jib caused fatigue cracks due to the stress concentration formed at the defects, and the cracks continued to expand during period in use. Ultimately, due to the reduction in the load-bearing area of the crane jib, it was unable to bear the weight of the lifting operation, resulting in an overload and fracture accident. In addition, improper operation by operators during the operation process, such as rapid lifting, oblique lifting (pulling), and impact, can generate instantaneous impact loads, which can also cause the lifting arm to be unable to bear the weight of the lifting operation. The joint action of the equipment itself and improper operation by the operators ultimately led to the occurrence of an overload and fracture accident of the crane jib.
Reliability Analysis of Reducer Gears Based on FTA
Authors: Chen Lin , Li Cheng
Published: October 2023

As a common power transmission component in the heavy industry field, reducers are widely used in wind turbines, lifting mechanisms, rail travel mechanisms, and many other occasions. If the transmission gear fails during operation, it will lead to serious consequences. Therefore, it is necessary to conduct reliability analysis on them to reduce the number of failures. This paper presents an analysis of the operating environment for a specific level of gears in a gearbox, taking into account potential gear failures and the impact of failures in other components. The reliability of the gear’s operating environment is modeled using the fault tree analysis method. By collecting relevant event failure rate data and failure time data for seal failures in gearboxes obtained from the company, parameter estimation of the failure distribution for seal failures is performed using the maximum likelihood estimation method. The data obtained from the calculation of the distribution functions for each event failure is used to conduct quantitative analysis of the fault tree. Based on the results of the quantitative analysis of the fault tree, the weak links in the system, which are important failure factors affecting the normal operation of the gear, are identified. Guiding improvement suggestions are provided to enhance the reliability of gearbox gear operations.
Effect of Disc Gap on Flow Field in Milk Separator During Operation
Authors: Wang Lulu , He Jianhua , Li Zhenzhen , Luo Ningfeng , Ke Haojie
Published: October 2023

Disc separator is a kind of equipment commonly used to separate fat from whey in milk. It separates the fat and whey in milk by centrifugal force, and the separated whey is purer and the fat content is more uniform. In this paper, the influence of disc gap on the flow field in the separation bowl during the working process of milk separator is studied. In this paper, the circumferential velocity of the fluid lags behind the movement of the discs at various disc gap values, but due to the small change of the disc gap values, it is not found that the circumferential velocity lag with large disc gap is more prominent than that with small gap values. The increase of the disc gap will reduce the separation efficiency of the separator, and it will increase with the increase of the disc gap value. The feed rate of the disc channels in the lower layer (especially the first two layers) will increase, and the uneven feed rate of each channel will become more prominent. This study has certain theoretical value and application value.
Impact Strength of Wax Material Using SLA Method
Authors: Truong Tran Minh , Tuyen Tran Khanh , Tam Pham Thanh , Mai Do Thi Le , Nga Pham Thi Hong , Long Nguyen Nhut Phi
Published: October 2023

Material additive technology, or 3D printing technology, has been determined as one of the forthcoming manufacturing techniques of most enterprises. The mechanical properties of by-products manufactured utilizing 3D printing technology depend on many factors, one of the most important being the printing angle. Currently, there is no standard for 3D printing angles. Therefore, the influence of printing angle on the mechanical properties of printed materials in 3D printing technology is still a mystery. The current study probes the impact of printing angles on the mechanical properties of the printed material, precisely the Castable Wax Resin V1 material, by 3D Stereolithography (SLA) printing method on the Formlabs Form 3+ machine. This paper analyzes the mechanical properties of Castable Wax Resin V1 printing material by testing printed specimens at three different printing angles (0°, 45°, and 90°). The impact strength is measured on printed models by corresponding tests according to standards. From the analysis data, the pattern printed at an angle of 90° has the highest impact strength, and vice versa for samples printed at 0°.
Finite Element Analysis on the Rack of the JC-17B Mobile Lifting Jack
Authors: Zhang Shiqiang , Chen Qian , Lei Ming
Published: October 2023

Mobile lifting jack is one of the important equipment to CRH train overhaul, mostly in the manual mobile lifting jack. The JC-17B mobile lifting jack is often used as a lifting jack of CRH, which can implement lifting operations of 8 and 16 trains simultaneously. The mobile lifting jack mainly consists of the rack, transmission device, head supporting portion, walking device and other components. For efficiency, some structural modifications have been carried out, with electric pushing rods used for the expansion and contraction of the head supporting portion, and motor drive used for the walking device. At the same time, the original motor has been modified from the traditional top installation to the bottom installation to facilitate the maintenance of the lifting jack. Rack as an important component bears all loads, and its mechanical properties, especially the strength, play an important role in the normal operation of the entire equipment. This is the use of modern design method, using Pro/E, ANSYS and other modern engineering software platform, to do mechanical and modal analysis for rack on JC-17B mobile lifting jack, complete the rack design optimization, The analysis results show that the maximum stress is, which does not exceed the yield limit. Additionally, the thickness of the rack is reduced by 2mm, and the mass is reduced by 21.9%, thereby having saved materials and reduced production costs. Practice has proved that the mobile lifting jack developed based on the optimization method in this paper works well in actual operation, and for the future of all types of mobile lifting jack development, technological transformation and equipment renewal provides a reliable basis for the design.
Research and Application of Test Bench Method for Jaw Type Electronic Differential Lock
Authors: Wang Yumeng , Zheng Jinjun , Wang Xin
Published: October 2023

The situation is quite rough when using the differential lock when the car is out of difficulty due to high torque or improper operation, the differential lock fails. This has an adverse impact on car brands and driver safety. With the increasing number of off-road vehicles in China, differential lock as one of the important components of off-road vehicles, it is essential to ensure the reliability of the differential lock. At present, the research on differential locks in China is relatively backward and there is no standardized test standard established. In recent years, there has been an increasing demand for research on the performance and reliability of differential locks among enterprises, however, the research on relevant standards and test benches in China is still incomplete. After analyzing relevant experimental standards and theoretical knowledge both domestically and internationally. Based on the actual needs of manufacturing enterprises and the actual usage of the vehicle. This paper provides a test rig method based on the electronic control differential lock of an off-road vehicle. According to the experimental plan, a differential lock durability impact test bench and a static torsion test bench were built, after analyze the test results after conducting relevant experiments, this indicates that both the test plan and the test bench can meet the testing requirements, it will provide relevant basis for differential lock performance and reliability test.
Parametric Analysis of the Dynamics of a Nonlinear Vibration Isolator
Authors: Puzyrov Volodymyr , Losyeva Nataliya , Savchenko Nina
Published: October 2023

Vibration isolation systems are widely used in engineering practice in order to reduce the transmission of the unwanted vibrations from the foundation to equipment. In last decades for this purpose commonly are considered nonlinear vibration isolators (NVIs), which usually are much more effective than linear ones. At the same time, the comprehensive analysis of the dynamics of the NVI is rather difficult, because even for a single Degree-of-Freedom (sDOF) system there is a multiparameter problem, and conventional grid search in parameter space may be computationally costly. This leads to the need for a preliminary analytical study of the model in order to identify “favorable” regions in the parameter space to reduce displacement and/or force transmissibility of an isolator. In present study we consider sDOF isolators with nonlinear stiffness and damping. Assuming that amplitude and frequency of external excitation are unknown we suggest a procedure to determine the stiffness and damping values (or, to put it more precisely, ratios between linear and nonlinear components) which allow satisfactory reduction of the transmissibility for a given range of frequency values. In particular, the case study of quasi-zero stiffness NVI is analyzed, and results are compared with those known from the literature.
Study on the Optimal Design of Anchor Retaining Wall Earth Pressure Distribution
Authors: Du Guilin , Ren Zhuojun , Ren Huimin , Zhao Xiaoyang , Yang Pengcheng
Published: October 2023

In this paper, the slope of the side wall of a reservoir floodway is taken as an example, and the anchor retaining wall is used as the research object. Based on the theory of calculating the soil pressure distribution of the anchor retaining wall in the Chinese code, the numerical model is established with finite element software, adopts the inverse method to simulate the wall construction and anchor construction, and also considers the relative friction between the anchor anchored section and the soil body after grouting, solves the change of anchor rod axial force and the soil pressure distribution process of the elevated anchor retaining wall model under different working loads, and proposes an improved analytical formula based on the theoretical solution for solving the soil pressure distribution of the specification and the soil pressure and displacement distribution of the wall. The method also proposes an improved analytical formula for solving the normative earth pressure distribution based on the theoretical solution, which provides a theoretical basis for future engineering design optimization.
Dynamic Analysis of Double-Tapered Rotating Beams Composed of Bidirectional Functionally Graded Materials (BFGMs)
Authors: Taima Moustafa S. , El-Sayed Tamer A. , Friswell M.I.
Published: October 2023

This study examines the vibration of rotating beams with double tapered geometry utilizing BFGMs. Material properties of the beams are power law distributed in the x and z directions. The stiffness and mass matrices are derived employing the Reddy formulation, also known as the Third-order Shear Deformation Theory (TSDT). Our main goal is to analyze the impact of material distribution, taper ratios, and rotational speed on beam natural frequencies. The obtained results are compared to previous research, demonstrating strong agreement and confirming the reliability and effectiveness of our approach. The study revealed that increasing the taper ratio in the width direction led to a higher natural frequency. Conversely, increasing it in both the height and width directions or in the height direction alone resulted in a lower natural frequency, except for the first mode.
Study on the Influence of Impeller Back Blades on the Performance of Slurry Pump
Authors: He Lingyan , Fan Xiaofu , Chen Bingsen , Li Jianfa
Published: October 2023

In order to study the influence of the impeller back blades on the external characteristic parameters, axial force and internal flow field characteristics of slurry pump, a 150ZJ-I-C42 slurry pump was taken as a research object. Firstly, the 3 full-flow channel calculation model including the suction chamber, impeller, volute case, extended inlet and outlet parts were established. Secondly, based on CFD numerical simulation technology, steady simulations of slurry pump with and without back blades were carried out under six different operating conditions. Finally, the simulation results were analyzed and compared with the experimental data. The influence of back blades on slurry pump’s performance, pump chamber pressure and axial force was obtained. The results show that, the head and input power of slurry pump with back blades increase obviously, but the efficiency decreases. When the impeller applying back blades, the pressure difference value between the impeller’s front and rear cover plates greatly decreases, which results in a much smaller value of axial force. As the flow rate increases, the axial force direction will change, and the effect of the back blades balancing the axial force will be more significant. The Numerical calculation results are quite similar to the experimental data, which showing high reliability. The results of this research can provide some advices for the operation and optimization design of slurry pump.
Failure Analysis of a 16Mn Transmission Pipeline
Authors: Wu H. , Yang H.J. , Xie M. , Ban J.Q. , Zhou H. , Tang Y.F.
Published: October 2023

This study investigates the failure causes of a spiral submerged arc welded 16Mn for a natural gas transmission pipeline in Sichuan Province. The pipeline commissioned in the 1970s and exploded in 2022. The visual inspection, optical microscopy, scanning electron microscopy, energy dispersive spectrum, and X-ray diffraction were used to analyze the failure samples. Macro-cracks and pits were observed at the sample’s external surface. A crack spread along the axial direction and initiated at the external surface of the pipeline toward the internal surface. The crack initiated at the inclusions and grew transgranularly. The corrosion products mainly included FeCO3 and FeO(OH), while SiO2 and CaSO4 were from the soil that pH was in the range of 7–8. It was concluded that the near-neutral Stress Corrosion Crack (SCC) was the main mechanism in the incident. The other cracks initiated at the weld zone, so the poor weld quality also played an important role in terms of the buried gas transmission pipeline failure.
Design and Implementation of Industrial Robot Training Platform Based on Digital Twinning
Authors: Fu Renxuan , Zeng Jieqiong , Song Xianwen , Chen Qiming
Published: October 2023

In order to solve the problem of insufficient resources for practical training of industrial robots, a practical training platform of industrial robots is proposed by using digital twin technology, which includes physical entity model, virtual model, monitoring system, data and communication connection between each part to interact with data. The structure of the physical model and the structure of the virtual model are designed. The physical model is mainly composed of industrial robots and training platform. The virtual model can accurately evaluate, predict and optimize the real model and endow it with intelligence. The two level control system is used in the monitoring system, and the structure and components of the control system are given. The training system will digitally express the training platform of industrial robots, realize interactive virtual simulation training, and transfer the virtual operation results to the physical operation of robots, realize virtual-real integration practice and training through data communication, realize the coordination between the digital training platform and the physical industrial robots, break through space and physical equipment restrictions, and realize efficient and accurate skill training. This training system can not only carry out virtual simulation training, physical entity training, but also carry out virtual and real combination training. This training system improves the teaching effect, improves the students’ training experience, and improves the efficiency of students’ learning of industrial robots.
Design of Manned Platform Walking Mechanism of Transmission Line
Authors: Peng Ziping
Published: October 2023

According to the characteristics of the obstacle environment of high-voltage transmission lines and the requirements of maintenance tasks, a walking structure that can withstand high load, cross obstacles and climb slopes is proposed, which can be used in the scene of live maintenance of transmission lines on equipment platforms or manned platforms. The manned platform mechanism is composed of a control box, a walking mechanism and a frame, and has the design requirements of a maximum load of 300kg, the ability to cross a shock-proof hammer, a maximum climbing ability of 30° and a maximum walking speed of 0.2m/s. This paper introduces the composition and working principle of the walking mechanism, analyzes the operation process of the manned platform in the process of walking obstacle crossing and climbing, and understands the design of the walking mechanism by introducing the swing of the walking arm, the lifting of auxiliary wheels and the analysis of electromechanical transmission.
Design of a Control System for an Autonomous Underwater Vehicle EDYSYS1
Authors: Osa Edosa , Samuels Daniel Chinemelem
Published: October 2023

This paper describes the design of a control system for an autonomous underwater vehicle EDYSYS 1. An autonomous underwater vehicle is an unmanned and self-propelled underwater vessel that can operate independently underwater and carry out several missions as assigned to it compared to a Remotely Operated Vehicle (ROV) which is usually tethered to a ship or some other moored water vehicle. Intelligent design of control systems for autonomous underwater vehicles is an active area of research giving the demands for autonomy and the capacity for intelligent systems to satisfy such demands. A control system has been designed with the Raspberry Pi 4 computer as the main control unit. Various subsystems and sensors for data acquisition by the vehicle are controlled by the Raspberry Pi 4 which has the Robot Operating System (ROS) configured in it. The necessary intelligence for controlling each sensor is configured using Python programming language. The relevant Python scripts are thereafter implemented as nodes within the ROS framework. By calling the relevant nodes in ROS, various values of sensory data were obtained by the designed system in the ROS environment. Successful communication via LoRa was also achieved.
Research on Fault Line Selection of Small Current Neutral Grounding System Based on Improved Fuzzy Petri Net
Authors: Jie Yibing , Xu Minmin , Fan Youpeng , Wang Jinliang , Zhou Boxi , Rong Xiao , Fang Ran
Published: October 2023

With the complexity of distribution network structure, the traditional fault line selection method of small current earthing system can not meet the current power grid requirements, and can not guarantee the accuracy of fault location. Therefore, for the problem of fault line selection of small current neutral grounding system, it is an important research subject. Aiming at the problem that the accuracy rate of fault line selection of small current neutral grounding system is not ideal, a line selection method based on improved fuzzy Petri net is proposed. Three characteristic parameters of wavelet energy, active component and the fifth harmonic component are selected to conduct fault judgement as the input vector of fuzzy Petri net. Aiming at the dependence of fuzzy Petri net parameter selection on experience value, BP neural network is used for optimization. The results of the example simulation analysis show that the algorithm in this paper is of certain effectiveness and practicability.
Design and Research on the Lifting Push Rod for a Radar Antenna Array
Authors: Tao Guocan , Fang Jingshi , Li Biao , He Wenjie
Published: October 2023

A lifting electrical push rod mechanism which is suitable for the upper load pitch lifting has been designed based on a particular mobile radar in this paper. Through the theoretical modeling analysis of the lifting force of the electric actuator and the stability of the screw during the whole Lifting process, this article aims to investigate the influence of the compound load on the force and stability of the push rod during the lifting process of the screw, and to verify the accuracy of the calculation results by combination with the actual measurement results. The research results show that: in the lifting process of the upper load from the lifting angle 0 to 90°, the self-weight moment of the upper load is the main influencing factor of the force on the electric push rod, and in the lifting process, the maximum force on the electric push rod appears in the middle state of the lifting process, the lifting angle with the most dangerous screw stability coefficient and the position of the maximum force on the screw do not overlap. In the lifting process, the measured results and the theoretical calculation values are in good agreement, which proves the accuracy of the calculation model and method.
Development and Research of Substation Pillar Insulator Decontamination Robot System
Authors: Yan Yu , Zen Zhaoqiang , Wu Runqi , Gong Jie , Fan Shaosheng , Jiang Wei
Published: October 2023

In order to realize the automatic cleaning operation of UHV vertical insulators and reduce manual labor to the maximum extent, so as to improve operation efficiency and reliability, this paper proposes a cleaning operation system which is equipped with mechanical arm, double manipulator and its end tools on the vehicle-mounted platform, in which the end is equipped with cleaning brush and reaches the operation point by moving on the ground of the vehicle-mounted platform. Then the robot arm sends the end tool to the cleaning position through multi-joint motion, and the nozzle on the brush sprays water mist on the insulator disk surface, then the brush realizes the no-blind cleaning of the insulator disk surface. Based on the above analysis of the cleaning task, the basic structure and virtual prototype model of the robot are designed, and the corresponding physical prototype system is developed. The field operation experiment was carried out in the substation under the jurisdiction of Hunan Electric Power Company. The experimental results show that the robot can realize the no-blind cleaning operation of pillar insulators and the cleaning effect is sound, which verifies the feasibility and effectiveness of the robot structure. The research of this paper has important theoretical significance and practical application value for improving the automation level of operation and maintenance management for substation system.
Research and Simulation of Robot Cluster Motion Based on Flocking Algorithm
Authors: Wang Shang , Li Yanjie , Cui Long
Published: October 2023

The research on robot cluster control and collaborative motion has gradually become an important issue in the research of cluster robots A clustering control and collaborative motion algorithm based on the Flocking algorithm is proposed to address the above issues, which mainly includes three parts: robot cluster path planning, cluster object avoidance, and cluster formation control Firstly, a stable cluster formation is observed through the cluster control of the Flocking algorithm, which enables it to have the ability of cluster collaborative motion Based on this, an improved A * algorithm can be used to plan a cluster movement path At the same time, in the collaborative motion of robot clusters, dynamic and static objects can be avoided through the DWA algorithm, there quickly reaching the destination Solve the problem of cluster control and collaborative motion of robots in complex environments, and finally verify the effectiveness and rationality of the algorithm through simulation experiments.
Simulation Analysis of Influence of Different Sinusoidal Vibration Conditions on the Contact Pressure of Electrical Connectors
Authors: Jin Qijun , Kong Zhigang
Published: October 2023

Electrical connectors are one of the most important components of various electronic equipment. In the actual operation of equipment, vibration is one of the main factors affecting the reliability of electrical connectors. Vibration affects the contact pressure between the contact pairs of connectors, thereby affecting the contact resistance of connectors. So it is necessary to study the change of contact pressure. This article uses ANSYS workbench to study contact pressure changes under different vibration environments. The results show that the error between theoretical contact pressure and static data is only 2.53%, The small error fully proves the reliability and availability of finite element software, which facilitates our further modal analysis and subsequent sinusoidal vibration simulation analysis and under the action of vibration, the contact pressure decreases. The increase in vibration frequency has more significant impact than the amplitude. As the vibration frequency increases, the minimum value of contact pressure decreases.
Substation Equipment Defect Detection Method Based on Improved SRGAN
Authors: Zhao Zhenxi , Ni Fengxiang , Song Yuan , Li Hao , Wang Gang , Yang Biao
Published: October 2023

As the core facility of the power system, substations are vital to the safety of power resources, and its security and stability work are required for social production and people’s life. This paper presents an improved SRGAN-based substation equipment fault detection method that aims to correctly detect and locate common visual faults in power systems. First, an improved SRGAN super-resolution representation method with CBAM attention mechanism is proposed for small defects on the target in the original image are poorly represented. Secondly, the overall optimisation function of the improved SRGAN is designed by considering each sub-optimisation task comprehensively. Finally, the improved SRGAN is cascaded with YOLOv5 for final detection. The approach presented in this paper was tested on a sample set of real engineering applications and mAP metrics reached over 90%. The experimental results verify the high applicability of the method in the task of visual defect detection of substation equipment.
Material Recovery Facility (MRF) Sorting System Using Programmable Logic Controller (PLC)
Authors: Baldonado Faith , Arenga Delan Zoe , Solano Jonathan , Marajas Erman , Yap Evan Socrates , Ramilo Aileen Grace
Published: October 2023

The study was conducted to assess whether the PLC could operate the proposed prototype and segregate waste materials classified as metal (tin can), glass (glass jar), or plastic (plastic bottle). Electrical, electronic, and mechanical components were determined based on the requirements and compatibility of the system. The designed and programmed PLC ladder diagram was used to operate the system and then evaluated in terms of its functionality, reliability, process rate, and accuracy. After several trials, the Material Recovery Facility Sorting System using PLC was developed. It was found that all components were functional and effectively performed their respective tasks. The proposed system is functional, reliable, and accurate enough to sort waste materials according to their type (glass, metal, plastic) with a processing time of 21 seconds for tin cans, 22.46 seconds for a glass jar, 18.48 seconds for plastic bottles, and 18.51 minutes for segregating 20 kilograms of waste materials. Thus, it has the potential to reduce the unsafe and labor-intensive system in the current manual sorting process at the Material Recovery Facility situated in Brgy. Masipag, Koronadal City.
PALMitate: Hand Gesture Robotic Hand Emulator
Authors: Cuñado Jobenilita R. , Gertos Ariel Van C. , Jimenez Karl Gian , Granada Jomarie C.
Published: October 2023

Safety-critical situations inevitably require human intervention, thereby, exposing personnel to formidable risks. This encompasses various domains, such as bomb disposal, emergency response, and hazardous material handling, all underlining the paramount importance of personnel safety. This research is dedicated to the development of a wireless robotic hand that replicates predefined gestures, facilitated by image processing algorithms. The hand gesture classifier attains an accuracy rate of 94.67% in identifying and distinguishing gestures. The implementation of hand gesture robotic hand emulators in safety-critical scenarios emerges as a pivotal strategy to potentially replace human participation. This substitution substantially mitigates risks for personnel. Moreover, it stands to enhance safety standards by virtue of its automated and controlled operation, thus minimizing the vulnerability associated with manual intervention. Fundamentally, this study acts as empirical validation of the substantial transformative capabilities inherent in robotics. This has the potential to completely reshape how dangerous tasks are handled in various industries which has a direct impact on keeping people safe and protecting valuable lives. Even though this research investigates a constrained selection of hand gestures and operates within a time limit for emulation, it establishes the fundamental basis for future progress in human-robot interaction and the realm of gesture recognition.