bluuebunny/crossref_metadata_2025 huggingface dataset:
Practical aplication of reinforcement remazol dyes on cotton material using fixation abu ash and amylum
Authors: Khaliq A D , Chafidz A , Rahmillah F I , Masruri M I , Hutama H D
Published: March 2021

Remazol is a synthetic dye from chemicals. Remazol can be used by dyeing, dripping or quenching. This dyestuff has water soluble properties, has brilliant colors with good fastness, low affinity. In the coloring process, color requires a fixation process. Fixation process, as a binder or reinforcement so that the color does not fade. Fixation is done with Na2CO3 or soda ash. soda ash or also known as Sodium carbonate, Na2CO3, is a sodium salt of carbonic acid which is easily soluble in air, white powder. soda ash can be used as a reinforcement for reactive type dye batik. By adding soda ash to a reactive dye solution or remazol, this automatic dye can become strong and not fade. After the soda ash fixation process is added starch which has the function to glue the fabric to the dye so that it is strong and does not easily wear off.
Service life prediction of historic timber-framed structures of the Kadariah Palace in Pontianak, Indonesia
Authors: Setiawan N , Prabowo H , Akbar E P
Published: March 2021

Durability is a significant subject when using timber in construction, especially for the historic building aged hundreds of years. The heritage building should be well preserved as a national identity and also as a legacy of humanity. Thus, it is crucial to understand the the building residual service life. It can be used to decide the time when the repair or replacement has to be done. The decay depth calculation shows that the main structural elements will reach the center of the cross-section (75 mm) in 150 years (around the year 1920). The condition threatens the stability and safety of the building. The additional width and thickness to the existing structural elements cross-section and the application of weather shield paint on the surface of structural elements periodically in recent times proved to be effective in maintaining the building remain to stand.
Experimental modelling of segregation on reinforced concrete beam using a graded concrete approach
Authors: Pratama M M A , Nindyawati N , Puspitasari P , Permanasari A A , Prayuda H , Sari U C
Published: March 2021

Segregation is a phenomenon that commonly arises in concrete because concrete is a multiphasic material. The segregation causes the concrete to create non-uniformly distributed along with the height of structural members so that it affects the material characteristics such as strength, stiffness, creep, durability, and structural performance resulting in a higher impact on maintenance costs and shorter structure life. To understand the effect of segregation on the RC beams as flexural elements on experimental works, researchers aim to model the beam underwent segregation using a graded concrete approach. To model this segregated element, a high strength concrete mix will be cast at lower fibre, while a mix of lower concrete strength is positioned at the upper fibre. In rupture stage, the segregated element gained its benefit in load performance due to the greater of the material strength at the bottom fibre. At yield and the ultimate stage, the beam exhibited a decrease in load performance due to the lower concrete strength in the area of neutral axis to the compressive fibre; creating a low resistance in load and stress transfer during the loading. After the yield of tensile rebars, the segregated beam fluctuates in the reading of load and deflection increments towards the ultimate point. With the accumulation of concrete density in the middle to the base of the beam element, interlocking action between the aggregates in the compression fibre has absent. When the beam performs a large curvature, the interlocking force of the material in charge of providing resistance to external forces is drastically reduced.
Analysis of the effect of flow position on homogeneity of lubrication in the blending circulation process using CFD
Authors: Syamsuri  , Lillahulhaq Z , Alim
Published: March 2021

Blending is the process of mixing of Base Oil and Additive to produce lubricating oil with the required specifications/characteristics. One of the determining factors to obtain the desired lubrication oil is the homogenization process. In this study, an analysis of the effect of the inlet position, circulation time, and flow velocity on the homogeneity of the resulting mixture was analyzed. The research method used is the computational fluid dynamic (CFD) simulation method with 2-dimensional (2D) fluent software. The flow that occurs in this condition is turbulent with the turbulent model used k-ε (epsilon). The results show that the upper inlet position within 10 minutes has gotten a homogeneous mixture compared to the lower inlet positions (30 minutes) and the center (20 minutes). Fluid flow velocity also affects the homogeneity of lubricating oil where the speed of 3 m/s within 10 minutes has obtained homogeneous results for all inlet positions compared to the velocity of 1.7 m/s and 2.5 m/s. In addition, the circulation time also affects the homogeneity level where for the lower inlet the circulation time needed to achieve homogeneity about 30 minutes. In conclusion, the longer the circulation time, the more homogeneous the mixture is obtained.
Potential use of graded concrete as structural elements of multi-storey buildings
Authors: Pratama M M A , Abifurrizal S , Novitasari Y , Damayanthi W , Puspitasari P , Permanasari A A
Published: March 2021

Research related to graded concrete is continuedly conducted to create high strength, lighter specific gravity, and lower manufacturing costs. In this study, researchers aim to study the behaviour of structures using graded concrete as a construction material. Two buildings with different slenderness ratios are prepared using ETABS. The results show that the structural vibration time of all models, do not exceed the maximum allowable value. The use of graded concrete provides a significant effect in high-rise buildings so that the high-rise structures behave more rigid in responding to lateral loads. The trend of storey stiffness increase is at the minimum value at the lower level and is gradually increasing on the higher storey level. The application of graded concrete as building materials in multi-storey buildings can be applied in storey level above the 1st floor so that the factors of material characteristics will dominate rather than the behaviour of the structures to create efficient construction. The use of graded concrete can reduce the value of sway in each model. The reduction of the sway gradually increases on the upper floor of the building. This is related to the additional stiffness contributed by the graded concrete of beams against the slabs.
Various current and electrolyte solutions of electroplating for medium carbon steel towards coating performance as corrosive protection
Authors: Setyowati V A , Niam A C , Abdul F , Darto
Published: March 2021

Electroplating is utilized to protect metals from environmental influences. This study aims to determine the effect of solution composition and electric current on coating thickness and to observe morphology with nickel plating. The electrical currents were set in 0.5A, 1A, and 1.5A. Meanwhile, the electrolyte solutions consist of NiSO4, NiCl2, H3BO3, H2O, and were added in different compositions. In this research, several characterizations were conducted to measure the thickness of the coated layer using a micrometer. SEM (Scanning Electron Microscopy) was used to observe the surface morphology. The thickness test is shown that the higher current obtained the thicker coating layer. Moreover, the higher compositions of electrolyte solutions affect more coating layer on the base metal surface. The rough surface was depicted on metal coated in low current. New iron-nickel and iron-nickel-oxide was detected by X-Ray Diffractometer (XRD) as Fe0.64Ni0.36 and NiFe2O4.
Using interactive technology in visualized narration book as a medium to promote hakka blue-dyed in jhanghu community
Authors: Peng L H , Lin Y H , Siswanto I
Published: March 2021

Looking at many products that combine indigo dyeing on the market, the old and new products are continually being introduced. However, there are only a handful of picture books related to traditional craftsmanship and manufacturing. In the literature discussion, we also found that the blue dyeing method was once replaced by modern industrial technology due to the complicated process. In recent years, with the evolution of the times, the awareness of environmental protection has risen, and the advantages of natural environmental protection of indigo dyeing have become increasingly prominent. From plant harvesting, refining indigo to dyeing, no chemical dyes are added. Therefore, let the traditional indigo dyeing technique, which has been in decline for a long time, eliminate the conventional impression and reappear in life with different product appearances. In this regard, the team uses three-dimensional and interactive technology application teaching picture books to allow the public to record the blue dye production process with a flexible, exciting, and plot-style story structure, and a more effective and easily acceptable way of learning technology for young people Ability to absorb relevant knowledge. Besides, in the future, we hope to use this kind of picture book framework to collect, record and preserve Taiwan’s unique traditional techniques in picture books and animation videos.
Investigation of concrete quality using Discrete Element Method (DEM)
Authors: Ma’arif F , Gao Z , Li F
Published: March 2021

This study describes the pattern of concrete damage to compressive and tensile strength on various of concrete quality using DEM (Discrete Element Method). Concrete was design as a uniform material in the three-dimensional analysis. Sphere particle is used to simplified the complex analysis. Laboratory testing is carried out to validate the performance of the DEM in the macroscopic model. Each variant has two specimens, the specimens consist of three different compressions, and the Brazilian splitting tensile test was 20MPa, 25MPa, and 30MPa. The test results show that the DEM analysis can model crack behavior under loads. The model was capable of predicting the performance of plain concrete with different qualities. The stress-strain curve, damage particle, velocity, and mechanical parameter of concrete quality were obtained. Finally, the uniform of spherical particle material is an alternative that can be proposed in the concrete laboratory-scale test modelling.
Black rice flour-based choi pan as an alternative snack for people with diabetes mellitus
Authors: Raissa U P , Palupi S
Published: March 2021

This study aims to: 1) develop the right recipe for an innovative Choi pan made of black rice flour, 2) examine the people’s acceptance on the developed Choi pan recipe, and 3) analyze the nutritional values contained in the black Choi pan. This study employed the R and D research design with the 4D models (Define, Design, Develop, Disseminate), while descriptive statistics were used to analyze the data. The results of this study:1) show that according to Ayudiah Respatih’s recipe, the right recipe for this black Choi pan should contain 50% black rice flour,2) it is shown by the mean value obtained from the test (3.43), in the preference test, it is found that the product is favored by non-trained panelists (3.83), 3) the proximate analysis test results show that the developed Choi pan contains 45.62% water, 1.60% ash, 13.61% protein, 11.57% fat, 4.66% crude fiber, 22.89% carbohydrate, and 251.08 kal/100g energy.
Visual validation of PLC program using virtual simulator
Authors: Badarudin R , Hariyanto D
Published: March 2021

This article discusses the programmable access interface between visual studio and the Siemens PLC simulator (S7-PLCSim). The communication interface adopts S7-ProSim COM object control. By using the S7-Prosim, we can write Microsoft Visual Studio-based software application code to change the PLC input value, read the PLC output value, change the position of the PLC control mode switch, and other controller tasks. Visual studio-based virtual modelling software applications can be used to validate PLC programs in real time. So that virtual lab-based PLC program validation is possible to develop based on Microsoft Visual Studio with a PLC interface using the S7-ProSim COM object.
The effects of product and service quality on repurchase decisions
Authors: Hasanah W U , Murniati D E
Published: March 2021

This study aims to find out several aspects concerning Jogja Paradise Food Court, including (1) product quality, (2) service quality, (3) customers’ tendency in repurchase decisions, (4) the effects of product quality on customers’ tendency in repurchase decisions, (5) the effects of services on the tendency for customers’ repurchase decisions, and (6) the effects of product and service quality on customers’ tendency for repurchase decisions. This was a descriptive quantitative study. The research population was approximately 750customers who purchased items there in a month. The research samples were chosen using incidental sampling technique, while the number of samples was determined using Slovin’s formula with a margin of error of 10%, resulting in as many as 90customers as the research samples. The findings show that (1) the quality of products sold at Jogja Paradise Food Court is in the medium category with a percentage of 71%; (2) the quality of service is in the medium category with 76%; (3) customers’ tendency in repurchase decisions is in the medium category with 86%; (4) there is a positive and significant effect of product quality on customers’ repurchase decisions as shown in the t value of 2.345 at the 0.021 significance level; (5) there is a positive and significant effect of service quality on customers’ repurchase decisions as shown in the t value of 4.247 at the 0.000 significance level; and (6) there is an effect of both product and service quality on customers’ repurchase decisions as shown in the results of Adjusted R2 of 32.7%.
Analysis stage in the development of a virtual laboratory electric motor installation for vocational high schools
Authors: Wati M S , Djatmiko I W
Published: March 2021

The study aimed to find out the design of instructional media which is suitable for practical learning of electric motor installation. It used needs analysis and front-end analysis which was carried out at Vocational High Schools in Yogyakarta. The result showed that the developing two-or three-dimensional media in the form of virtual laboratories was strongly recommended. Virtual laboratories was able to visualize the components according to real conditions. The concepts and work principles of electric motor installations were showed in the form of a two-or three-dimensional simulation. Virtual laboratories was expected to help virtual learning and train students’ independence and competence in practicing electric motor installation.
Case study of electronic fuel injection competence acquisition of students at SMK PGRI 1 Ngawi
Authors: Nasrudi M , Pardjono  , Efendi A , Noviansyah W
Published: March 2021

This study aims to explain the acquisition of electronic fuel injection knowledge at SMK PGRI 1 Ngawi, Namely: (1) achieved the level of knowledge of students, (2) what is the process of understanding electronic fuel injection, (3) how students acquire competence electronic fuel injection, (4) how students try to master electronic fuel injection, (5) What are the attitudes, knowledge and skills of PGRI Vocational students in the EFI field. This research is a type of case study with a descriptive qualitative approach data obtained by using interviews, observation, and documentation. Data is processed using data triangulation techniques. Data analysis using interactive models from Miles & Huberman. The results of the study indicate that: (1) Pencapaian aspek pengetahuan siswa SMK PGRI 1 NGAWI tentang EFI dengan nilai rata-rata kognitif skor 77 (2) the process of understanding student competencies takes place in classrooms and workshops, (3) students gain knowledge about electronic fuel injection independently by reading books, the internet, and the learning process at school, (4) students make efforts by independent learning, group learning, and listening to the teacher’s explanation, (5) The competencies obtained by NGAWI SMK PGRI 1 students can be seen from three aspects, namely knowledge, skills and attitudes. In the aspect of knowledge, students get several competencies, namely: (a) basic material regarding electronic fuel injection, (b) electronic fuel injection sensors, (c) electronic fuel injection maintenance, and (d) how to fix it. In the aspect of skills, students get several competencie
All-Dielectric Metasurface Refractive Index Sensor with Microfluidics
Authors: Zhong Juechen , Ghosh Pintu , Li Qiang
Published: March 2021

Magnetic resonance and electrical resonance can be excited simultaneously by the incident light source in high refractive index all-dielectric metasurfaces. They can manipulate light waves to a certain extent and can be used in many fields. Silicon is widely used in all-dielectric metasurfaces due to its high refractive index and low loss in near infrared range. In this paper, we use silicon nanodisk structure as refractive index sensor and PDMS microfluidic channels as detection channels to realize liquid refractive index sensing. The magnetic resonance peak of the nanodisk structure is selected for sensing. The position of the magnetic resonance is shifted in the transmission spectrum with the change of the refractive index of the surrounding environment. When the refractive index increases, the resonance peak moves towards the long-wave direction, resulting in red shift, and vice versa. In this paper, the shift of resonance peak reaches 230 nm RIU−1.
Investigation of Electrochemical Corrosion Behaviour of 6082 Aluminum Alloy under Simulated Deicing Agent Conditions
Authors: Yang Li , Yang Shoubing , Huang Genzhe
Published: March 2021

In this study, the aluminum alloy of 6082 with different treatment processes (T1 and T6) was tested in simulated artificial deicing agent solution. The polarization curves show that the alloy suffered from pitting attack, the corrosion resistance of extruded sample (T1) is lower than that of forged sample (T6) in the same medium solution. With the increase of chloride ion concentration, the corrosion current density of T1 and T6 samples increased, the maximum corrosion depth increased, and the corrosion resistance of alloy samples decreased. The morphology on the polarized alloys show that the the surface of T1 sample revealed a higher number of pits. And the difference of corrosion resistance between T1 and T6 is closely related to the difference of microstructure.
The Research of Monte-Carlo Method for Aviation Materials Demand Forecast Based on the Life of the Reliability
Authors: Cui Xu , Ai Pengchao , He Jun , Wang Shuo
Published: March 2021

With the rapid development of the aviation industry, the increasing number of missions and the impact of other new circumstances, the contradiction between supply and demand in aviation materials has become increasingly prominent. Consequently, more uncertainty and unpredictability in spare parts’ demand, as well as the absence of accurate value of holding, overstocking and backordering costs, result in traditional inventory control policies ineffective. In order to make better use of the existing stock aviation material resources, it is necessary to study the optimization of aviation materials inventory management. In this paper, the reliability analysis of aviation materials maintenance data is conducted to grasp the occurrence rules of aviation materials failures, determine the failure distribution function, and establish a mathematical model of spare parts guarantee and demand based on stochastic process theory. The Monte-Carlo simulation method is used to calculate the aviation materials demand. The calculation results show that the method can achieve the purpose of controlling the inventory level through the demand under varying guarantee degrees, which makes the management of aviation materials more scientific.
Effect of Laser Strengthening on Electrochemical Corrosion of AA6082 Aluminum Alloy
Authors: Yang Li , Wang Dongxu , Huang Genzhe
Published: March 2021

In this study, the surface of 6082 aluminum alloy was machined by laser heat treatment, and the microstructure and properties of the affected zone of laser surface were discussed by scanning electron microscope (SEM). The experimental results show that the laser treatment has an obvious second phase fine grain strengthening effect on the surface of aluminum alloy. The local hardness of the surface laser action zone has been improved obviously. Combined with the polarization curve data and microscopic corrosion morphology, with the addition of laser, the corrosion resistance mechanism of aluminum alloy has been well optimized, and the number and continuity of pitting pits on the surface of aluminum alloy have been restrained. The intergranular corrosion and the maximum corrosion depth behavior decreased under the corrosion of Cl−. The comprehensive properties of aluminum alloy surface have been effectively optimized under the action of laser heat treatment.the effect of laser heat treatment on the corrosion resistance and the surface mechanical properties of AA6082 aluminum alloy was investigated.
Effect of TiC Nanoparticles on the Mechanical Properties of a K465 Superalloy
Authors: Zhang Litao , Liu Zhenglu , Zhao Qinglong , Jiang Qichuan
Published: March 2021

In this paper, the effects of TiC nanoparticles on the mechanical properties of the K465 superalloy were investigated. The elongation of the K465 alloy was improved by adding TiC nanoparticles without ultimate tensile strength reduction. Adding TiC nanoparticles can also effectively refine grain size and influence dendrite morphology. Moreover, the addition of TiC nanoparticles also led to the change of carbide morphology. The improvement of elongation was attributed to the refined grains and changed the morphology of carbides.
Analysis of Strength and Compression Damage Characteristics of Soil Rock Mixture Based on Geopolymeric Reaction
Authors: Zhang Yan , Zhou Shengjie , Wang Lin , Cao Yuliang , Fan Liang , Hou Jialin
Published: March 2021

Geopolymers was a common means of solidifying soil which can improve the overall strength of the soil. In order to further explore the strength and damage characteristics of the soil-rock mixture under the action of gel coagulation, this paper analyzed the compressive strength of the soil-rock mixture under different stone content through the unconfined compressive strength test. The results illustrated that when the amount of stone was small, the compressive strength decreases linearly with the increase of the amount of stone, and increased with the increase of the amount of geopolymer; According to discrete element method, using PFC2D software, to simulate the microscopic deformation and mechanical properties of the specimen during compression. The increase of stone content would magnify the damage of the soil when it reached the failure, but it did not necessarily increase the overall soil mass numerically. The strength of the soil would be greatly improved when the stone content reached a state that could form a skeleton structure.
Absorption Mechanism and Optimization of a Subwavelength Acoustic Absorber
Authors: Zhao Honggang , Wang Yang , Zheng Qiquan , Cao Junhui , Wen Jihong
Published: March 2021

A subwavelength acoustic absorber based on parallel coupled Helmholtz resonators is designed to extend the absorption band, where the lateral space is used and verified to reduce the overall thickness. Both theoretical analysis and finite element method are used to demonstrate the low frequency absorption performance. The ratio of absorber thickness to resonant wavelength acquires only 1.87%. It has found that the side location of perforation can move the absorption peak to lower frequency range. The absorption mechanism is investigated by analysing reflection coefficient in the complex frequency plane. The energy dissipation modes underlying absorption performance are further revealed by the viscous energy dissipation patterns. Finally, the absorber is optimized by a DE algorithm to extend the absorption band below 500Hz. The present design offers us an acoustic absorber with excellent stiffness and strength for low-frequency absorption.
Research on the Influencing Factors of FDM 3D Printing Accuracy
Authors: Zhou Changxiu , Han Tiantian
Published: March 2021

Printing accuracy is a general issue of FDM 3D Printing, take rectangular pieces made of PLA as an example, The effects of bottom/top thickness, filling density and placement position on the dimensional accuracy of printed pieces are studied. The results show that the influence of each factor on the dimensional accuracy of the workpiece has a directional difference.
Research on the Seismic Performance of Highly Durable Concrete Structures with Corrosion-resistant Reinforcing Steel Materials
Authors: Gao Ran
Published: March 2021

The combination of high durability concrete and GFRP reinforcement for infrastructure construction in the South China Sea can meet its durability requirements under high temperature, high humidity, high salt spray and high radiation environment. Due to the frequent seismic activities in the South China Sea, it is imperative to study the bearing capacity and seismic performance of GFRP reinforced high-durability concrete components and structures. The authors first analyzed the load-bearing performance of GFRP reinforced highly durable concrete beams and established the correction formula for its load-bearing capacity calculation based on the research results. Then the seismic performance of the GFRP reinforced high durability concrete structural members is studied. The seismic damage of the new structure and components is studied by analyzing the hysteresis curve, skeleton curve, stiffness degradation and other parameters. The time course curves and inter-layer displacement angles of GFRP reinforced high durable concrete structure are studied by adjusting the reinforcement type and concrete type, and finally the seismic performance of GFRP reinforced high durable concrete structure is obtained.
On the Natures of Thermally Induced Ultrasonic Emission from Nanofilm
Authors: Hu Hanping , Zhang Kai , Wang Dongdong
Published: March 2021

Thermo-acoustic (TA) ultrasound has lots of advantages over traditional electric-acoustic ultrasound. In this work, by using a full-field formulas derived for acoustic field of TA emission from arbitrary source based on a thermally-mechanically coupled model, the basic natures of TA emission from nanofilm are studied via carbon nanotube (CNT) film. It is found that the TA sound pressure level (SPL) is fluctuated in near field and attenuated in far field, the SPL fluctuation in near field results from the interference of TA waves emitted from every element of film, which directly leads to the existence of, in point of technique, the most important nature of TA wave--flat frequency response at certain condition, and in far field, all the sound-emitting films can be regarded as point sources. These researches are significant for understanding TA wave and developing a variety of TA devices.
Discussion on the Teaching of “Engineering Materials” with Philosophy Thoughts
Authors: Liu Yan , Qu Yanpeng , Song Qinghua , Chen Songying
Published: March 2021

The college students in engineering can improve their professional level and comprehensive ability through learning the knowledge with philosophical ideas. In the teaching practice on the course of engineering materials, the authors constructed the contents including the ideological and political factors, and linked the philosophy thoughts with the professional education. The main results are as follows. We understand the similarities of engineering materials and life connotation, and clarify the internal relation and interaction mechanism between materials and objective environment through explaining the environmental theory; We know that we should find out the the principal contradiction during the engineering materials selection and life path selection through the contradiction theory; We understand the influence of various factors on the change of material performances and the influence of creative tools on the development of disciplines through the things correlation theory;We recognize that we need to sum up the historical experiences and learn the failure analysis methods to reduce the probability of disaster accidents through the philosophy methodology. Some relevant teaching cases are introduced in this paper.
Study on the Coupling Association between Human and House under the Influence of the Evaluation Index of Urban Residents’ Behavior
Authors: Gao Chenglin , Wang Yaying
Published: March 2021

The interaction mechanism between people and houses in urban residential space is explained by the coupling relationship in the system of housing science, The mathematical model of the human house coupling association is derived by using the coupling relationship to explain the interaction mechanism of the people’s house in the urban residential space. The mutual coordination system of the user, space and objective under the relationship of building and living behavior. The results show that: The residential space and residential behavior in Changping District of Beijing are entering a period of high-level coupled and coordinated development. Among them, the residential cultural indicators and their subsystems show positive feedback on the coupling relationship between residential behavior and spatial correlation. In the living space, moral education is the core that affects human behavior and spatial coupling. The sustainable role of the creation of the space environment, coupled to the indoor ecological environment and the outdoor natural environment; The coupling protocol of man and residence has dynamic and procedural properties, which rely on the behavior communication mode of the internal stage of the space to establish the spatial system of systematic variability.
Study on the Preparation of AlN-Modified High Thermal Conductive Activated Carbon Based on Rice Huck Ash Residue
Authors: Feng Anwen , Qiao Xiaokang , Qin Wu , Sun Huahai , Han Bing , Zeng Zongming , Wang Xiaoqiang
Published: March 2021

Preparation of activated carbon from biomass ash residue can effectively treat solid waste and improve the economics of the biomass power generation industry. However, the low thermal conductivity of activated carbon (AC) cannot make it widely used. A strategy was reported herein modify the activated carbon by AlN increase its thermal conductivity. Effects of reaction temperature, nitriding time, and nitrogen flow rate on the formation AlN and summarized the optimal process of AlN modified activated carbon. The result showed that the optimal preparation process is to inject nitrogen at a rate of 300 ml/min, under the condition of 1550°C, nitriding reaction for 50 min. The thermal conductivity of AlN-modified activated carbon prepared by this process is twice that of unmodified activated carbon.
Construction and Evaluation of Urban Sponge Road Traffic System Structure
Authors: Mao Chengyuan , Yang Shengde , Wang Qin , Xu Wenjiao , Li Peiran , Zhang Yongliang
Published: March 2021

The imbalance of traffic resources is one of the important reasons that restrict the healthy development of the urban traffic system. Based on the concept of “sponge city”, this paper puts forward a kind of road traffic system, which can explore the flexible space of transportation infrastructure. The Fuzzy Analytic Hierarchy Process is established to comprehensively evaluate the system performance, deeply explore the flexible space of urban transportation facilities, and improve the performance of the urban transportation system. The sponge-type road traffic system evaluation model proposed in this paper can provide a reference for other regions to tap the flexible space of regional traffic infrastructure resources.
Forward Simulation Study on the Emission Characteristics of Volatile Organic Compounds in Cars
Authors: Tong Liping , Xu Shujie , Wang Lei , Liu Wei , Liu Xuefeng
Published: March 2021

Volatile organic compounds (VOC), represented by formaldehyde and benzene, are highly carcinogenic and teratogenic, and can easily cause dizziness, nausea, vomiting and other illnesses. Their emission characteristics have a significant risk to the physical and mental health of passengers. The forward simulation of the emission characteristics of VOC in cars has become one of the important technical challenges for the automotive industry. In order to solve this problem, the emission and adsorption characteristics of VOC from interior parts of a car were investigated through a multi-interior coexistence experimental system. Based on this, a VOC emission prediction model was proposed in combination with the mass conservation law of VOC in the car and Henry’s law of VOC, and validated by engineering amplification for 22 pieces of interior co-existence simulated final assembly experiments, illustrating that the relative standard deviations of the model for VOC in the car were 30.0% (benzene), 50.0% (toluene), -9.8% (ethylbenzene), 10.0% (xylene), -23.5% (formaldehyde), and -28.9% (acetaldehyde), respectively, with good prediction effect, which are able to greatly meet engineering needs.
Crack Propagation and Predication on 2024 Aluminum Alloy under Combination Action of Friction and Fatigue
Authors: Yan Yutao , Jiang Cheng , Li Yang , Wu Xin , Zhang Zhao
Published: March 2021

The crack propagation of 2024 aluminum alloy under the combination action of non-lubricated sliding friction and fatigue was investigated by numerical simulation analysis and experimental methods. The variation regulation of stress intensity factors (SIFs) KI and KII, and the fatigue crack propagation under different initial crack length, tension and contact pressure was obtained. Based on numerical analysis, experiment research and Paris formula, the predication model of fatigue crack propagation rate was established. The results show that the crack is closed owing to friction force when the upper specimen slides toward the crack, while is torn as sliding away. When the upper specimen moves in the near crack zone, there is relative motion between the crack faces caused by contact pressure. The crack appears slip-open effect. In according to numerical analysis and experimental results, the crack propagation is I-II composite crack forms. The comprehensive influence on I-II composite fatigue crack propagation from large to small is tension, contact pressure and initial crack length. The predication model is verified to reasonable and effective by the new test investigation.
Simulation Research on the Braking Characteristics between Tires of the 3-Module Virtual Track Train
Authors: Zuo Jianyong , Diao Pengfei , Zhou Chunmei , Wang Xueping , Dong Liwei
Published: March 2021

The virtual rail train is a new type of urban rail transportation, which integrates some of the characteristics of buses, trams and light rail trains. In order to study its braking stability, the paper appeared from the perspective of vehicle dynamics, studying the braking force allocation strategy of the train under different working conditions. It is proposed to calculate the articulation force of the train from the motion parameters of the train, and analyze the dynamic change of the tire vertical load. The lateral force is prioritized to ensure that the train turns stably and avoiding tire slip. After that, the remaining braking force is used to maximize the utilization of braking force. The results show that this method of braking force allocation between tires can ensure that the tires are not locked, while ensuring the braking strength.
Research on Load Identification of Articulated Connector
Authors: Wang Zhongxiang , Zhu Ning , Yin Yi , He Maosheng , Zhang Qiang
Published: March 2021

With the further development of the piggyback transportation technology, the number of external loads, the action form and the effect of the articulated connector, which is a key component of the piggyback, are becoming more and more important references for strength design. Due to the complex and irregular structure of the articulated connector, it is particularly important to accurately identify the external load on the articulated connector structure during actual driving. Through the establishment of an eight-unit piggyback dynamic model, the longitudinal, lateral and vertical loads of the articulated connector under the excitation of the American five-level spectrum orbit were analyzed, and the identification schemes of the longitudinal, lateral and vertical loads of the articulated connector are proposed. It shows that each load identification scheme can identify the corresponding load more accurately.
Research on the Device of Measuring the Centre of a Weight
Authors: Zhong Ruilin , Wang Jian , Lee Sungjun
Published: March 2021

In order to correct the influence on precision mass measurement caused by the difference between centres of the test weight and the reference weight, the centre of the weight need to be measured, and a device is developed to locate the centre of the weight which includes a balance, a bridge and a supporting pole. In this paper, the detailed force analysis of this device is studied, and the detailed information on designing and selecting each part of the device is given.
Evolution and invariants of free-particle moments
Authors: Andrews Mark
Published: March 2021

Moments are expectation values of products of powers of position and momentum, taken over quantum states (or averages over a set of classical particles). For free particles, the evolution in the quantum case is closely related to that of a set of classical particles. Here we consider the evolution of symmetrized moments for free particles in one dimension, first examining the geometric properties of the evolution for moments up to the fourth order, as determined by their extrema and inflections. These properties are specified by combinations of the moments that are invariant in that they remain constant under free evolution. An inequality constrains the fourth-order moments and shows that some geometric types of evolution are possible for a quantum particle but not possible classically, and some examples are examined. Explicit expressions are found for the moments of any order in terms of their initial values, for the invariant combinations, and for the moments in terms of these invariants.
Statistical evaluation of the competitiveness of agriculture in the regions
Authors: Romantseva Yu N , Kolomeeva E S
Published: March 2021

In the research work, the authors propose an approach to a comprehensive evaluation of agriculture competitiveness in the context of the regions of the Russian Federation based on the construction of a hierarchical multidimensional model. Current state of agriculture, its competitiveness, system of indicators of competitiveness of the agrarian sector, based on competitive advantages are assessed, choice of the most important indicators that formed the basis for regions division into three clusters differing in terms of agriculture functioning is justified. The analysis of clusters made it possible to identify directions for further development of groups of regions to achieve growth in agricultural production in accordance with the Forecast of socio-economic development of the Russian Federation for the period up to 2036 and the Strategy of spatial development of the Russian Federation for the period up to 2025.
Effect of secondary bacterial metabolites from permafrost on photosynthetic activity of potato (Solanum tuberosum L.) in vitro culture
Authors: Renev N O , Subbotin A M , Narushko M V , Malchevskiy V A
Published: March 2021

The influence of secondary metabolites of bacteria from perennially frozen rocks on the activity of photosynthesis processes in potato leaves cultivated in vitro has been studied. Early meristemous potato plants of Zhukovsky variety were used as an object of research. The concentration of photosynthetic pigments of chlorophylls a, b and carotenoids was determined by spectrophotometry. Calculation of concentrations of chlorophylls a, b and carotenoids by Wellburn formula. It was found that when potato microplants are grown together in the Murashige-Skoog nutrient medium with metabolites of bacteria of Bacillus cereus 9-08-CH9 and Achromobacter spanius 10-50TS2 strains, introduced at the moment of drawing in a dose of 250 pl, under conditions of sufficient and optimal nutrition the process of photosynthesis is stimulated. First of all: by activating the light-gathering ability of the plant, by increasing the synthesis of chlorophyll b (on day 20), as well as increasing the resistance of plants to adverse environmental factors, through the synthesis of carotenoids (on day 30). The obtained results can be used for creation of biopreparations on the basis of microbial metabolites in order to increase efficiency of microclonal reproduction technology of potatoes.
Application of active exoskeletons with touch sensing, electric drives, energy recuperators and gravity compensators in agricultural technologies
Authors: Borisov A V , Borisova V L , Konchina L V , Kulikova M G , Maslova K S
Published: March 2021

The article describes a model of a digital human-machine system, in the form of a three-dimensional model of an active exoskeleton with five links of variable length, developed for possible use in agriculture. The difference between the proposed model of an active exoskeleton and the existing ones is that links are used that can change their length under the action of applied loads, and energy recuperators are built into these links. In each joint of the links between each other there are gravity compensators. These design solutions can reduce the load on the electric drives of the exoskeleton and increase the battery life of the device, which is important when used in agriculture. As an interface between a person and an exoskeleton, touch sensing will be used. The principle of operation is that the signals from the touch sensors will be sent to the control module of the exoskeleton, amplified and implemented by electric drives in accordance with the movement of each link of the human endoskeleton with minimal delay. Each link of the exoskeleton consists of two sections of constant length, having a mass, and one weightless section between them, changing its length. The links are connected to each other by a combination of joints. A set of differential equations is written in the form of a system describing the exoskeleton dynamics. This system was written in a generalizing matrix-vector form. Much attention is paid to the possibility of real application of the proposed model of the active exoskeleton in agriculture and the positive results arising from its practical use.
Evaluation of the effect of micronutrient fertilizers based on chelates on grape and wine quality characteristics
Authors: Cherviak S , Anikina N , Ermikhina M , Aleinikova N , Didenko P
Published: March 2021

Mineral nutrition plays an important role in the processes of growth and development of the grape vine. Our studies show that using microfertilizers based on chelates during the growing season contributes to an increase in the bunch weight by 3.9-18.2 g and in the grape yield by 5.4-18.9%. Experimental grape samples are characterized by a higher content of titratable acids (by 0.8-1.8 g/l) and anthocyanins in a berry (by 12-39%), the proportion of extractable anthocyanins (by 3-8%) and a low content of seed tannins (by 2-3 times) compared to the control. In the prepared wines, the content of the total dry extract and phenolic substances exceeded the control values by 1.3-6.1 g/l and 13-27%, respectively. Experimental systems of treatment had a positive effect on the quality characteristics of wines: red color, varietal aroma of berry direction, fresh and fuller palate compared to the control variant, which was reflected in the tasting assessment (5-7 points higher than the control).
Agrobiological methods of increase in germinating capacity of seeds of perennial legume grasses in the Middle Preduralie
Authors: Zubarev Y N , Zabolotnova M V
Published: March 2021

The article presents the results of laboratory research of swelling rate of non-traditional for the region perennial crops: Gelega orientalis, Poterium polygamum in comparison with traditional Medicago varia Mart. Investigation of watering and swelling process was carried out by gravimetric method. Positive effect of scarification on the rate of water consumption of Galega orientalis and Medicago varia Mart is confirmed: swelling rate of Galega orientalis increased from 0.14 1/h up to 1.09 l/h, Medicago varia Mart – from 0.24 l/h up to 1.85 l/h, which is seven times more than the swelling rate of non-scarified seeds. The swelling rate of scarified seeds of Poterium polygamum conversely decreased from 1.69 l/h to 0.74 l/h. Laboratory seed germination of Galega orientalis and Medicago varia Mart with seed scarification and soaking up to 60% of water level increased threefold relative to the control variant without scarification and twofold to the control variant with scarification. Negative effect on biometric parameters of Galega orientalis and Medicago varia Mart seedlings was noted when seeds were soaked up to 100% of water level. Laboratory germination of Poterium polygamum in all experimental variants was equal to 96%. However, parameters of seedlings were different regarding experimental factors, thus biometric parameters of seedlings increased with the raise of water level in non-scarified seeds of Poterium polygamum and decreased in scarified ones.
Artificial intelligence for digitalization of management accounting of agricultural organizations
Authors: Korobeynikova O M , Korobeynikov D A , Popova L V , Chekrygina T A , Shemet E S
Published: March 2021

In Russia, much attention is paid to the development of the digital economy and artificial intelligence technologies. Agricultural organizations need artificial intelligence. Artificial intelligence creates new opportunities for substantiating management decisions, including in the field of management accounting. The aim of the study is to develop directions for using artificial intelligence in the management accounting of agricultural organizations. The methodology of management accounting has been supplemented with new provisions that show the use of artificial intelligence in the management system of agricultural organizations. Interpretations of the elements of the management accounting methodology are proposed: the object (historical, current and prospective information on the costs and results of financial and economic activities in different sections and details), the subject (financial and production activities of agricultural organizations and their structural elements), methods (general and specific). It is proposed to expand the statement of the goal of management accounting (strengthening the efficiency, reliability and completeness of information provided to management) and tasks (identification and measurement of activity parameters; increasing the efficiency of information collection; operational preparation and processing of information with a given degree of detail and depth of time lag; strengthening the quality of management analysis, control, planning and forecasting). It is proposed to supplement the methodological characteristics of the principles and functions of management accounting with new analytical and organizational capabilities. It is concluded that artificial intelligence can become an applied management accounting tool, expanding its traditional capabilities.