bluuebunny/crossref_metadata_2025_split huggingface dataset:
A non-resonant piezoelectric sensor for measuring 50Hz or 60Hz electric currents
Authors: He Wei , Niu Sixian , Luo Mingshan , Liu Shuanghua 
Published: May 2023

Abstract
A non-resonant piezoelectric sensor for measuring power-frequency (50 Hz or 60 Hz) electric currents is proposed to be applied in electric power systems. The device consists of a magnetic circuit, two piezoelectric plates, and fixed plates. The magnetic circuit is made up of three NdFeB magnets and two permalloy yokes. The high sensitivity of the device is attributed to the magnetic field concentration and the induced shear stresses. A prototype has been fabricated and the feasibility of the self-powered sensor was validated. The average sensitivity reaches 28.56 mV/A in the range of 1 A to 10 A, and the accuracy is 0.02089 mV at a current of 3.5 A. A current variation of 0.02 A is distinguished under the non-resonant condition of 50 Hz. The self-powered, highly sensitive, non-resonant, and high-resolution characteristics make the device favorable for measuring real-time electric currents in electric power systems.
Primary Frequency Control of Wind-solar-storage Power Station Considering Discrete Control Nonlinearity
Authors: Zhang Xiaodi , Wang Cheng , Bi Tianshu 
Published: May 2023

Abstract
With the gradual advancement of dual-carbon goals, the wind-solar-storage power station has become the mainstream trend in constructing new energy stations due to their wind energy and luminous complementary characteristics. However, the current research on primary frequency control of new energy stations is still focused on a single-machine strategy. The communication delay and control period caused by long control links are not considered. It is difficult to describe the influence of the difference in dynamic characteristics of wind-solar-storage power on primary frequency control performance. Therefore, this paper takes the multi-layer control link wind-solar-storage power station as the research object, establishes the nonlinear control model considering the influence of control delay and control period, and puts forward the wind-solar-storage power plant primary frequency control method, which is suitable for participating in the frequency control of power grid.
A Power Grid Fault Diagnosis Method Considering Online Dynamic Alarm Information
Authors: Du Mingxuan , Wang Zirui , Zhang Ziqi , Wang Yixian , Zhang Xu 
Published: May 2023

Abstract
With the continuous development of the smart grid and the gradual improvement of the demand for grid reliability and power grid self-healing capability, a large number of artificial intelligence technologies have been applied to the power grid. In order to improve the automation of the power grid, realize automatic fault identification and diagnosis after a power grid failure, and improve the efficiency of fault handling by the dispatching department, it is of great practical significance to use alarm information to achieve accurate fault judgment. However, the difference between the dynamic reading of alarm information flow and static samples in engineering applications is often ignored in the research of fault diagnosis using alarm information, which makes it difficult to apply fault diagnosis methods in engineering practice. Based on the characteristics of the LSTM algorithm, such as deep knowledge extraction ability, data mining ability and time series knowledge processing ability, this paper studies the power grid fault diagnosis method based on LSTM to adapt to the data of each sampling time window in the process of online fault diagnosis, solves the problems faced by the application of traditional diagnosis methods in engineering practice, and effectively improves the reliability of fault diagnosis.
Influence of Rubber Particles on Performance of Asphalt Mixture
Authors: Wang Xiaoming 
Published: May 2023

Abstract
The rubber material produced by waste tires greatly pollute the environment. Adding it to the asphalt mixture can improve its performance of the asphalt mixture. The elastic asphalt pavement paved with it has strong durability and can reduce the noise hazard to a certain extent. Adding large-diameter rubber particles into asphalt pavement materials can inhibit pavement icing and reduce the probability of traffic accidents caused by pavement skidding in winter. The results show that with the increase of the content of rubber particles, the ability of pavement to suppress ice formation is enhanced. However, when the temperature is below zero, with the decrease of temperature, the ice suppression effect of elastic material pavement is weakened; When the temperature is lower than -14 °C, the anti-icing performance of rubber particle asphalt pavement reaches the limit.
Study on Sound Absorption Performance of Aluminum Foam Combination
Authors: Jiang Tairu , Wang Yonghua , Xu Jinkai , Yu Huadong 
Published: May 2023

Abstract
Aluminum foam is a kind of new material with a large number of holes distributed in aluminum alloy. It has the characteristics of lightweight, sound absorption, energy absorption and vibration reduction, and other porous materials. Aluminum foam has good acoustic performance. However, its excellent sound absorption ability is only reflected in the middle and high-frequency bands. Besides, the low-frequency sound absorption ability is very poor and the frequency band is narrow. Therefore, in this paper, different types of perforated aluminum foams with different parameters are combined to explore the influence on acoustic performance and find that the combination of large porosity perforated sample and aluminum foam has a better sound absorption effect. The unperforated sample is placed in front of the perforated sample to improve the sound absorption coefficient of the low and medium frequencies. Finally, different types of perforated aluminum foam samples were properly combined, and it was found through the test that almost all sound waves in the band of 1200 HZ~2000 Hz could be absorbed by the combined structure.
Study on Biodegradation Rate of Konjac Polysaccharide Aerogel Filter Rod
Authors: Wang Hao , Xu Yueming , Zheng Han , Xie Jiao , Yue Baoshan , Wang Xixuan , Yu Yao , Wang Xu , Yu Tingting , Yu Jiang , Zhan Jianbo 
Published: May 2023

Abstract
The konjac polysaccharide aerogel filter rod has the functions of high filtration efficiency and cooling. The biodegradation rate of konjac polysaccharide aerogel filter rod prepared by vacuum freeze drying machine was studied in this paper. The results showed that at the end of the degradation experiment (the 106th day), the biodegradation rate of konjac polysaccharide gel filter rod reached 84.9%, which was close to the degradation rate of thin-layer chromatography grade cellulose, indicating that it had good biodegradability.
Discussion and application of ball mill in preparation of particle size samples of fine grained sedimentary rocks
Authors: Huang Lina 
Published: May 2023

Abstract
The grain size of clastic rocks is one of the most important structural characteristics of clastic sediments, which can directly reflect the hydrodynamic conditions of ancient sedimentary period. The preparation of conventional clastic rock particle size samples is usually done by hand wet grinding with a grinding hammer by experienced experimenter. For the fine-grained sedimentary rocks, the conventional method for preparing grain size samples has the disadvantages of long time and low efficiency. This paper introduces a method of preparing grain size samples of fine grained sedimentary rocks by separating rock particles with ball mill. By carrying out the experiments of separating rock particles by ball mill, the influence of different sample quality and ball mill parameters on the particle size and particle size distribution of fine grained sedimentary rock in the process of rock particle fragmentation by ball mill was discussed. The conditions for separating particles of fine grained sedimentary rocks by ball mill are determined as follows: sample mass is 0.14 g ~ 0.20 g, ball mill frequency is 10 Hz, ball milling time is 3 min, the efficiency of particle size sample preparation is greatly improved. The final particle suspension samples were tested by laser particle size analyzer, and the particle size distribution characteristics of fine-grained sedimentary rocks were given, which provides a basis for the study of lithology classification, lithofacies characteristics and hydrocarbon reservoir heterogeneity, and plays an important role in the exploration and development of unconventional oil and gas.
Luminescence properties of glass ceramics doped with Tb4O7 and containing Na3Gd (PO4)2
Authors: Chen Xi , Jia Wentao , Zhang Hongbo 
Published: May 2023

Abstract
It has been determined that 374 nm is the optimal excitation wavelength for Tb4O7 doped glass ceramics. XRD, SEM, UV spectrophotometer, and photoluminescence spectroscopy were used to study glass ceramics morphology and luminescence properties. 730°C is the optimal temperature for crystallizing. At 0.4mol% Tb4O7 concentration and 2h crystallization time, this is the optimum solution. The results of this study indicate that glass-ceramics doped with Tb3+ can be applied to green lasers and other systems.
Analysis of Constraint Factors for Bridge Maintenance in Poso District
Authors: Fauzan  , Nirmalawati  , Kusnindar  
Published: May 2023

Abstract
Bridge maintenance is a routine activity that must be carried out by the manager but the implementation of bridge maintenance in the Poso Regency has various obstacles. So the research will be carried out to know the constraint factors in the implementation of bridge maintenance. This type of research is descriptive, population of PUPR employees in the field of maintenance and contractors who have handled bridge maintenance projects, totalling 40 respondents. Calculation of data analysis using factor analysis. The results showed that there were six factors that hindered the implementation of bridge maintenance, namely: (1) Implementation of Construction Management during procurement & execution of work, (2) Project Resource Planning & Weather, (3) Implementation of project resources and communications, (4) Monitoring of project resources and resource conditions, (5) Commitment and material availability, (6) The quality of equipment in the field. The six factors influence 80,462%, and the remaining 19,538 % are influenced by other factors. It is suggested that the management needs to make these six inhibiting factors as a reference in determining the strategy or planning for the implementation of routine maintenance projects.
Numerical Study of Castellated Beam with Stiffener – Case on Cantilever Structure
Authors: Haris S , Sari P K , Masrilayanti  
Published: May 2023

Abstract
A castellated beam is designed to increase the depth of the beam by slicing the beam web longitudinally in a specified form and re-unite both pieces using welding to obtain a higher flexural capacity of the beam. Due to the increase in cross-sectional height and the presence of openings in the web plate, some potential failures may occur, for example buckling of the web and stress concentration on the opening. Addition of stiffener on the web is useful to prevent those potential failures. This paper presented a numerical study of castellated beam with additional stiffeners which is applied on a cantilever structure using MSC Nastran software. The castellated beam was added by stiffeners placed on three different zones. There were stiffeners on the perimeter of opening, on the web between openings, and on the web of opening. The cantilever beam was subjected by a point load increased monotonically until ultimate condition reached. It was found that applying of the stiffeners on perimeter of opening will increase ultimate load up to 7.48 % comparing to the original castellated beam. On contrary, stiffeners on the web between openings and the web of opening will decrease the ultimate load within the range of 0.40% - 4.86 %. The beam stiffness will slightly increase because of these three types of additional stiffeners. Regarding ductility of the beams, adding of stiffeners on the castellated beam showed vary numbers. Overall, the stiffeners on perimeter of opening become an alternative to increase the performance of the castellated beam in term of the ultimate load, beam stiffness and ductility.
Enhanced digital water level measurement for irrigation channel
Authors: Loekito J A , Tallar R Y , Pattipawaej O , Sutandi M C , Sihombing T O , Yapinus P P , Chandra J , Tanubrata M , Lesmana H , Karsten L , Tonny  , Efferiki  , Madvi H A S P , Purba F P 
Published: May 2023

Abstract
Indonesia needs to improve its irrigation system by implementing respectable technology. Recently, Indonesian irrigation systems have intended to switch from analog to digital technology. However, it appeared that Indonesia was having some issues applying digital technology in many areas. For instance, delivering water from water sources to irrigation subversives requires a computer infrastructure. A manual water level monitoring tool has been used in irrigation canals to gauge the water level that flows through them. The major goal of this project is to design a digital measuring device for water level and water temperature in the irrigation channel. The appropriate information must be entered into the irrigation channels. An experimental investigation has been conducted into the accuracy of digital instrument design for detecting water level and water temperature in irrigation channels. The creation of the digital water level measurement design will be tested against manual measurement to determine the percentage difference. The percentage difference between the traditional water level measurement and the digital water level measurement is the anticipated outcome. It is possible to infer that it is crucial to use digital tools, especially when determining the water level in irrigation channels.
A conceptual framework for implementing lean construction and building information modeling (BIM) in post-disaster housing reconstruction projects
Authors: Syaputra T A , Rarasati A D 
Published: May 2023

Abstract
The occurrence of natural disasters in Indonesia every year results in massive damage to people’s homes. It requires a fast and appropriate post-disaster housing reconstruction (PDHR) strategy. The building firm or contractor is among the most significant contributors; in post-disaster conditions, the contractor has to work in a project environment that is much more complicated than conventional projects, and this often results in poor contractor performance. An approach to improve contractor performance is the application of Lean Construction. In line with this linking, the function of the Building Information Modelling (BIM) tool in the application of Lean has also proven effective in conventional projects. However, studies focusing on its simultaneous application to PDHR projects are still lacking. A conceptual framework that can be applied to specific Lean and BIM implementations in PDHR projects is needed to address this issue. This paper proposes a conceptual framework by identifying and analyzing various previous studies as a proper basis. The study shows several Lean Construction and BIM factors relevant to contractor performance indicators in post-disaster housing reconstruction projects.
Utilizing information technology towards reducing forest and peatland fire risk in Riau Province, Indonesia
Authors: Eklou R J , Widana I D K K , Suwito  
Published: May 2023

Abstract
Forest and peatland fires have become a seasonal challenge experienced in Riau Province. This disaster causes huge economic and environmental losses, accompanied by its alarming impact on human health. The haze as a result of land burning in this province is known to disrupt activities in neighbouring countries causing political and diplomatic tensions. To reduce the risk of forest and peatland fire, the Riau Regional Police developed the Lancang Kuning Nusantara (LKN) digital application. This study examines the general role of the application in reducing forest and peatland fire risks. A qualitative descriptive approach is adopted in analysing the primary data obtained through focus group discussion. Data from secondary sources were also obtained. Results from this study indicate that the use of the LKN digital application in Riau Province has helped immensely in the area of disaster risk communication and logistics support.
Effects of argon plasma pretreatment of Si wafers on Si-Si bonding based on Mo/Au interlayers
Authors: Qu Yongfeng , Bai Haiyang , Hu Wenbo , Yuan Yuan , Wu Shengli , Wang Hongxing , Fan Huiqing 
Published: May 2023

Abstract
To improve the bonding quality of Si-Si wafers bonded based on Mo/Au intermediate layers at room temperature, the surfaces of Si wafers were pretreated with argon plasma, and the effect of argon plasma pretreatment on Si-Si wafer bonding was analyzed by combining experimental and theoretical methods. Owing to the plasma treatment of Si wafers, the surface roughness of Si wafers was significantly reduced, and the bonded Si-Si samples had lower interfacial voidage. The average bonding strength of 11.46 MPa for the argon plasma pretreated Si-Si bonded samples is much higher than the bonding strength of 4.23 MPa for the unpretreated Si-Si bonded samples. The analysis of the fractured surface revealed that the fracture of the Si-Si bonded samples without argon plasma treatment occurred mainly at the Mo/Si interface, while the fracture of the plasma-treated Si-Si bonded samples arose mainly within the bulk Si. Molecular dynamics (MD) simulations suggest that strong atomic diffusion takes place at the Mo/Au interface, while Mo atoms hardly diffuse into the bulk Si. These results indicate that argon plasma pretreatment not only cleans and activates the Si wafer surface but also makes the Si wafer surface smooth, which helps to enhance the deposited Mo/Au film quality and the adhesion between the Mo film and the Si wafer.
Polarity switching via defect engineering in Cu doped SnSe0.75S0.25 solid solution for mid-temperature thermoelectric applications
Authors: Athithya S , Jibri K P Mohamed , Harish S , Hayakawa K , Kubota Y , Ikeda H , Hayakawa Y , Inatomi Y , Navaneethan M , Archana J 
Published: May 2023

Abstract
Solid solution SnSe0.75S0.25 has potential to improve thermoelectric performance via ultra-low thermal conductivity as compared to the pristine SnSe which originates from phonon scattering due to disordered atoms of selenium (Se) and sulfur (S). SnSe0.75S0.25 and Cu-doped SnSe0.75S0.25 compounds were prepared via high energy ball milling and pelletized by a spark plasma sintering (SPS) process. Dislocation and point defects were successfully introduced by SnSe0.75S0.25. The existence of S in the Se site induced mass fluctuation which favors high-frequency phonon scattering. This leads to an impressively ultra-low thermal conductivity (κT) value of 0.258 W mK−1 at 753 K for SnSe0.75S0.25. Next, the Cu dopant was selected to enhance the electrical conductivity, which improved from 514.44 S m−1 (SnSe0.75S0.25) to 725.08 S m−1 for Sn0.98Cu0.02Se0.75S0.25 at 738 K. Interestingly, the Cu dopant induced nanoprecipitates of Cu2Se inside the grains, which further strengthens the phonon scattering. The Cu2Se nanoprecipitates and various defects at the grain boundaries contributed to a lower κT of 0.295 W mK−1 at 753 K for a Sn0.94Cu0.06Se0.75S0.25 sample. Moreover, the maximum figure of merit of (ZT) ∼0.19 at 738 K was attained for the Sn0.98Cu0.02Se0.75S0.25 sample.
Innovative instrumentation to strong reduction of the noise levels inside newborn incubators used in the neonatal intensive care units
Authors: Ramos Paulo Roberto Medina , Zebende Gilney Figueira , Cruz Juan Alberto Leyva 
Published: May 2023

Abstract
In spite of the advent of medical technology, modern newborn incubators (NIs) do not protect them from high noise levels in the neonatal intensive care units (NICUs). Allied to bibliographical research carried out measurements were made inside the dome of a NIs and the results show that the sound pressure levels, or noises, are much more intense than the levels stipulated by the norm NBR IEC 60.601.2.19 of ABNT. These measurements revealed that the NIs air convection system motor is the main source of excess noise. In view of the above, a project was developed with the objective of significantly reducing the noise level inside the dome by modifying the air convection system. Thus, a quantitative study was developed, based on the experimental method, where a ventilation mechanism was designed, constructed and tested, which operated from the network of medical compressed air, present in the NICUs and maternity rooms. Respectively, before and after the modification of the air convection system, the data of relative humidity, air velocity, atmospheric pressure, air temperature and noise [(64.9% ur/33.1% ur); (0.27 m s−1/0.28 m s−1); (1.013.98 hPa/1.013, 60 hPa); (36.5 °C/36.3 °C); (45.9 dBA/30.2 dBA], were collected by electronic meters that registered the conditions of the external and internal environment of the dome of an NI with a passive humidification system. The noise measurements in the environment showed that there was a strong reduction of 15.7 dBA, or 34.2% of internal noise, measured after the modification of the ventilation system, showing a significative performance of the modified NI. Therefore, our results may be a good choose to improve NI acoustics to enable optimal care of the neonate in the neonatal intensive care units.
Noise reduction and power generation in blower duct using Helmholtz resonator with piezoelectric diaphragm
Authors: Tadokoro Chiharu , Ito Takuma , Nagamine Takuo 
Published: May 2023

Abstract
Ventilation duct systems are indispensable for air purification and room temperature management in industrial and commercial buildings. The noise generated by blowers for ventilating spaces should be as low as possible. In addition, to power the wireless nodes for monitoring the ventilation conditions such as temperature and pressure at any positions in all the ducts, electric power is preferred to be generated in situ without batteries and wired power supply. In this study, to demonstrate simultaneous noise reduction and in situ power generation using a Helmholtz resonator with a piezoelectric diaphragm in a straight circular pipe duct, the frequency properties of the sound pressure level (SPL) with/without the piezoelectric diaphragm and its generated voltage were measured using an in-house apparatus simulating an industrial blower duct. The experimental results show that the Helmholtz resonator with the piezoelectric diaphragm has a noise reduction performance similar to that without the piezoelectric diaphragm. Power generation was improved not only by impedance matching between the inner and outer resistance but also by the frequency resonance between the frequency of pressure fluctuation in the Helmholtz resonator and the natural frequency of the piezoelectric diaphragm. The Helmholtz resonator with the piezoelectric diaphragm achieved a noise reduction of 10 dB from an SPL of 103 dB and power generation of 12 μW at an SPL of 93 dB.