bluuebunny/crossref_metadata_2025_split huggingface dataset:
High-gain low-excess-noise MWIR detection with a 3.5-µm cutoff AlInAsSb-based separate absorption, charge, and multiplication avalanche photodiode
Authors: Dadey Adam A. , McArthur J. Andrew , Kamboj Abhilasha , Bank Seth R. , Wasserman Daniel , Campbell Joe C. 
Published: February 2023

Mid-wavelength infrared (MWIR) detection is useful in a variety of scientific and military applications. Avalanche photodiodes can provide an advantage for detection as their internal gain mechanism can increase the system signal-to-noise ratio of a receiver. We demonstrate a separate absorption, charge, and multiplication avalanche photodiode using a digitally grown narrow-bandgap Al0.05InAsSb absorber for MWIR detection and a wide bandgap Al0.7InAsSb multiplier for low-excess-noise amplification. Under 2-µm illumination at 100 K, the device can reach gains over 850. The excess noise factor of the device scales with a low k-factor of ∼0.04. The unity-gain external quantum efficiency of the device attains a peak of 54% (1.02 A/W) at 2.35 µm and maintains an efficiency of 24% (0.58 A/W) at 3 µm before cutting off at ∼3.5 µm. At a gain of 850, the device has a gain-normalized dark current density of 0.05 mA/cm2. This device achieves gains more than double that of the state-of-the-art InAs detectors and achieves gain-normalized dark current densities over two orders of magnitude lower than that of a previously reported MWIR Al0.15InAsSb-based detector.
La negociación de la autenticidad en el lenguaje dialógico del turismo digital
Authors: Vittoria Calvi Maria , Suau-Jiménez Francisca 
Published: February 2023

ResumenEste artículo se propone realizar un análisis socio-discursivo de cómo se construye y se negocia la autenticidad en el discurso del turismo, asumiendo el acercamiento imparable que ha tenido lugar hacia la figura del cliente (Austin 2009) a través de un fenómeno comunicativo esencial como es la dialogicidad. Este discurso ha ido encarnando progresivamente unaautenticidad negociada(Cohen 1988), que va ajustándose a variables sociales, como ocurre con la pandemia por COVID-19, pero que incluye igualmente variables culturales. Utilizamos 100 muestras de oralización dialógica en español e inglés de varios cibergéneros (páginas web institucionales y redes sociales de turismo) que apoyan nuestra argumentación. Pretendemos ofrecer una visión contrastiva sobre la negociación de la autenticidad discursiva y de las emociones como elemento central en el turismo digital, según el trinomio turismo-sociedad-lenguaje, que permita una mejor comprensión de la tendencia comunicativa social actual con propósito mercantilista.
Robot 3D spatial motion measurement via vision-based method
Authors: Wu Lulu , Liu Yi , Wang Yuan , Du Xin , Xiong Xinyan , Jiang Benchi 
Published: February 2023

Abstract
Measuring the motion of a robot accurately is an important and integral part of evaluating the dynamic and static performance of the robot. The performance index of a robot, such as kinematic accuracy, bearing capacity, deformation, vibration, stability, and structural mode can all be calculated according to the motion displacement of the robot. Therefore, improving the robot motion measurement method, promoting the measurement accuracy, and enriching the measurement content have received considerable scholarly attention worldwide. In this paper, an approach based on binocular vision was proposed to measure the 3D spatial motion of a robot. In the process of reconstructing robot movement, a mathematical model that can facilitate the solving process and improve the accuracy of results was derived to build 3D coordinates information. A novel coordinate transformation method that is based on the singular value decomposition was drawn up to realize the transformation from camera coordinates to robot coordinates. Several experiments were carried out on the self-built three-degree-of-freedom rectangular coordinate robot platform. The marker was designed specially and glued to the end of robot, and a new train of thought was adopted to extract the marker’s feature point. The vision-based measurement results were compared with the actual coordinate value. Results of experiments demonstrated that the proposed method can successfully reconstruct the 3D spatial motion of a robot more exactly, which can meet the requirements of high-precision motion control, motion performance evaluation, and operation state evaluation.
Stylized versus voxel phantoms: quantification of internal organ chord length distances
Authors: Coleman D , Griffin K T , Dewji S A 
Published: February 2023

Abstract
Dosimetric calculations, whether for radiation protection or nuclear medicine applications, are greatly influenced by the use of computational models of humans, called anthropomorphic phantoms. As anatomical models of phantoms have evolved and expanded, thus has the need for quantifying differences among each of these representations that yield variations in organ dose coefficients, whether from external radiation sources or internal emitters. This work represents an extension of previous efforts to quantify the differences in organ positioning within the body between a stylized and voxel phantom series. Where prior work focused on the organ depth distribution vis-à-vis the surface of the phantom models, the work described here quantifies the intra-organ and inter-organ distributions through calculation of the mean chord lengths. The revised Oak Ridge National Laboratory stylized phantom series and the University of Florida/National Cancer Institute voxel phantom series including a newborn, 1-, 5-, 10- and 15 year old, and adult phantoms were compared. Organ distances in the stylized phantoms were computed using a ray-tracing technique available through Monte Carlo radiation transport simulations in MCNP6. Organ distances in the voxel phantom were found using phantom matrix manipulation. Quantification of differences in organ chord lengths between the phantom series displayed that the organs of the stylized phantom series are typically situated farther away from one another than within the voxel phantom series. The impact of this work was to characterize the intra-organ and inter-organ distributions to explain the variations in updated internal dose coefficient quantities (i.e. specific absorbed fractions) while providing relevant data defining the spatial and volumetric organ distributions in the phantoms for use in subsequent internal dosimetric computations, with prospective relevance to patient-specific individualized dosimetry, as well as informing machine learning definition of organs using these reference models.
An all-fiber high-power picosecond amplifier with Yb-doped polarization-maintaining tapered fiber
Authors: Wang Jianlei , Lu Jingqi , Zhang Ning , Wang Chao , Wang Chun , Zhuo Zhuang 
Published: February 2023

Abstract
A high-power picosecond all-fiber master oscillator power amplifier (MOPA) was demonstrated based on the Yb-doped polarization-maintaining (PM) tapered double-clad fiber (T-DCF). An all-fiberized pumping unit instead of the free space pumping structure was adopted in the MOPA system to provide a compact robust solution for high-performance amplifiers. The total average output power of 180.3 W was achieved with a slope efficiency of 80.8% by taking advantages of the large fiber mode area and the suppression of nonlinear effects in the T-DCF. The peak power was calculated to be 27.7 kW at the pulse width of 260.8 ps and the repetition rate of 24.91 MHz. The polarization extinction ratio and beam quality (M
2 factor) were measured to be ∼10 dB (91%) and ∼12, respectively.
Experimental Study on Effects of Different Water Flow Rates on Heat Transfer Characteristics of Evaporator
Authors: Yang Maoli , Wu Xianyun , Zhou Wenping , Liu Xiangshu , Qiang Rui , Huang Fuchuan 
Published: February 2023

Abstract
Since China set forth the goal of “dual carbon”, studies on heat transfer characteristics of evaporators have been one of the hot spots in the field of refrigeration and heating. This paper conducts an experimental study on the heat transfer performances of evaporators under different flow rates by changing the water flow of the evaporator and condenser. The results shows that on the premise of unchanged water flow of condenser, cooling coefficient of performance (COP) and heat transfer coefficient (HTC) grow with the increases in flow rates of evaporator and temperatures of inlet and outlet water. However, the changes in HTC are relatively smooth; the compressor’s inhalation and expulsion temperatures grow with the increases in water flow rates of the evaporator, and the changes are quite evident. The paper also discusses and analyzes deeply those manifestations, which provides experimental evidence for the experiments and improvement of the evaporator, optimization of evaporator design, and the enhancement of the economic performance of the system.
Research of Distributed Photovoltaic Output Fluctuation Suppression Method Based on Improved FPA
Authors: Li Shilong , Zhang Hua , Ding Lijie , Chen Yufan , Li Ao 
Published: February 2023

Abstract
Due to weather changes, the distributed photovoltaic (PV) output power has fluctuations, seriously affecting the power quality of the distribution network. This paper proposes a distributed PV power output fluctuation suppression method based on the improved Flower Pollination Algorithm (FPA) to solve the above problem. This method uses an annihilation perturbation mechanism and linear weights to update the pollen position, which mainly affects the output power of photovoltaic power plants. The time constant of the first-order low-pass filter is optimized, and the improved flower pollination algorithm is utilized for optimization to obtain the optimal time constant of the first-order low-pass filter, suppressing the fluctuation of distributed photovoltaic output and integrating the photovoltaic power station’s output. The simulations indicate that the improved flower pollination algorithm is better than other evaluated algorithms and has an improvement of about 11% over the particle swarm algorithm.
CO2 capture based on polyanthraquinone/carbon nanotube composites
Authors: Ling Junyi , Feng Jingsong 
Published: February 2023

Abstract
Carbon neutralization is a new way of environmental protection, in which carbon capture is the core of carbon neutralization. Firstly, the preparation method of polyanthraquinone/multi-walled carbon nanotube composites (PAQ/MWCNTs) was studied. The composites were prepared by magnetic stirring and centrifugal separation. The working electrode was prepared by using the composite material for carbon capture. A three-electrode system was established to capture carbon dioxide when the reduction potential was applied and to release carbon dioxide when the oxidation potential was applied by cyclic voltammetry. It is found that the carbon dioxide capture effect of the polyanthraquinone/multi-walled carbon nanotube composite prepared in this study reaches 7.80mmol/g, and the material utilization rate reaches 73.4%.
Comprehensive Energy System Evaluation Method of Low-carbon Park Based on Improved Entropy Weight
Authors: Fan Libo , Zhong Xiaohong , Chen Jiawei , Tu Yongwei , Jiang Jian 
Published: February 2023

Abstract
To improve the consistency between the evaluation results and the actual situation of the comprehensive energy system in the low-carbon park, the improved entropy weight algorithm is introduced to carry out the design and research of the evaluation method. Based on the principles of quantifiability, scientificity and systematicness and combined with the actual situation of system operation and the development needs of low-carbon parks, the evaluation index system of the comprehensive energy system in low-carbon parks is constructed. According to the process of primary evaluation, multi-level evaluation and comprehensive evaluation value calculation, the comprehensive energy system grade evaluation is completed. The comparative experiment proves that the evaluation results of the new evaluation method are basically consistent with the radar chart of the actual situation of the system, which shows that the evaluation results are more realistic.
Comparison of wind-induced responses of transmission tower in normal wind field and downburst wind field
Authors: Chen Keji , Zhang Linlin , Li Guoqiang , Kang Lili , Yao Jianfeng 
Published: February 2023

Abstract
To study the difference in the wind-induced response of the transmission tower caused by the downburst and the well-conditioned wind field, this paper uses the harmonic superposition method to simulate the well-conditioned wind field and the downburst wind field. The wind-induced responses of the transmission tower under the two wind farms are obtained and compared through the analysis. The wind-induced responses caused by the two wind fields on the transmission tower are quite different, and the downburst can cause a larger wind-induced response.
Study on mechanical properties of the cross arm-insulator system under strong wind load
Authors: Huang Xiaoyu , Tang Ziqiang , Cheng Nuo , Lin Rui , Weng Lanxi 
Published: February 2023

Abstract
High-voltage transmission tower-line systems in coastal areas are often affected by strong winds, which leads to structural damage to the towers. Detailed analysis of the damage mechanism of towers is very useful to ensure the safety and stability of the power system. This paper examines the mechanical properties of the cross-insulator structure under horizontal wind load, and then the load-carrying capacity and deformation performance were analyzed based on ABAQUS. The results show that the structure is stable under the load, and the main structure is basically in the elastic working stage with insignificant flexural and torsional effects. On the contrary, the local stress of the combined link rod connected with the insulator is large; the bending deformation characteristics of the combined link rod are obvious under the maximum horizontal load the insulator can withstand. This result can provide a reference for cross-arms structural safety design.
Optimization of Lateral Interlock Protection for Thermal Power Units
Authors: Zhang Lingli 
Published: February 2023

Abstract
According to the Twenty-Five Key Requirements for Preventing Electric Power Production Accidents, the protection of important capital and auxiliary equipment should adopt the “Two Out of Three” logic judgment method, and the protection signal should follow the whole process from the sampling point to the input module. The principle of relative independence is that the number of measuring points is insufficient due to system reasons, and measures to prevent disoperation should be taken. Considering that a coal-fired power plant’s third-phase engineering steam turbine, boiler, and generator lateral protection signals are single-point design and do not meet the requirements of countermeasures, the abnormality of a single circuit of the protection signal will cause abnormal protection actions and affect the safe and stable operation of the unit. Therefore, the original control strategy is systematically optimized by adopting the “Two Out of Three” logic and successfully passes the ETS, DEH, FSSS, and lateral interlock protection tests. The result provides a reference for equipment malfunction in the operation of the same type of units.
Study on the Electron Density Measurement of 1 m Rod-plate Gap Discharge Process under the Lightning Impulse
Authors: Zhang Yaqi , Han Yongxia , Zheng Wenbo , Yang Jie , Qu Lu , Liu Gang 
Published: February 2023

Abstract
Observation and measurement of the microscopic parameters in the long air gap discharge process play an important role in studying its physical mechanism and the discharge simulation model. In this paper, we combined an electron-multiplying intensified charge-coupled device (EMICCD) camera and a spectrometer, and built a lightning discharge spectrum observation platform of spatiotemporal distribution for the 1 m rod-plane air gap with nanosecond exposure time. The spatiotemporal distributions of the spectral information of the 1 m air gap discharge under positive and negative lightning impulses were obtained. Based on the atomic emission spectroscopy diagnostic method, N and O atomic spectral lines were used to calculate the corresponding electron density at different positions and time points during the breakdown discharges. The testing results were compared with other literature and the differences also were discussed.
Simulation of Branch Pipes Fracture Condition in Low-Pressure Safety Injection System of PWR
Authors: Deng Chunyin , Chen Guoxing , Lu Zhuang , Wu Shuhui 
Published: February 2023

Abstract
In the low-pressure injection system (LHSI) of the PWR unit, two branch pipes of the recirculation pipeline are vulnerable to fracture during minimal-flow operation. Flowmaster was used to create a hydraulic model for the LHSI minimal-flow operation and to simulate the branch double-end shear fracture condition in order to predict the leakage flow volume and the water level drop rate of the refueling water storage tank (RWST) in order to analyze the impact of branch pipe fracture on the water leakage of the RWST. According to the study results, there is very little deviation between the operating condition of the system as it actually is and the Flowmaster model, and the leakage volume following branch pipe fracture is considerably less than that of the RWST. Leakage volume per minute is around 0.025% of the RWST’s overall volume, which has negligible influence on the unit’s safety. Based on the results of the simulation, this study suggests LHSI system operation recommendations.
Research on Optimal Ratio of Wind-PV Capacity and Energy Storage Optimization Configuration of Regional Power Grid
Authors: Lv Xiaoxu , Wang Zhengfeng , Li Zhi , Shao Yijun , Zheng Cheng , Hao Lili 
Published: February 2023

Abstract
Reasonable optimization of the wind-photovoltaic-storage capacity ratio is the basis for efficiently utilizing new energy in the large-scale regional power grid. Firstly, a method of wind-photovoltaic capacity ratio optimization for improving new energy accommodation is proposed, including the evaluation model of new energy accommodation and the model of wind-photovoltaic capacity ratio optimization. An optimal allocation method of Energy Storage for improving new energy accommodation is proposed to reduce the power abandonment rate further. Finally, according to the above method, the optimal ratio of wind-photovoltaic capacity and the optimal allocation of energy storage in the target year of the regional power grid are studied. The results can provide a reference for the subsequent construction of wind and photovoltaic power plants and the region’s allocation of energy storage capacity.
Anti Interference Clock Error Correction Technology Based on BD3 System
Authors: Zhao Ruifeng , Li Shiming , Lu Jiangang , Xu Zhanqiang , Chen Zhiwei 
Published: February 2023

Abstract
Beidou-3 (BD3) uses the pseudo range transmission method to calculate the clock difference through the pseudo range. However, due to the influence of electromagnetic interference, the clock difference measurement error is too large, which affects the timing accuracy of the power system. This paper first introduces the principle of Beidou timing service; Secondly, it introduces the clock error calculation method; Finally, combined with the clock difference calculation method, this paper presents an anti-interference clock difference correction method based on Least Mean Square (LMS) filter. According to the principle of LMS filter, the influence of electromagnetic interference on pseudo distance can be eliminated, and the clock difference can be calculated. Then the clock difference can be corrected. The simulation results show that the method is feasible and effective.
Effects of polar molecules on direct current performance of EPDM for cable accessories
Authors: Li Zhongyuan , Chen Shiyu , Zhang Weichao , Guo Yuenan , Liu Heqian , Yang Hongda 
Published: February 2023

Abstract
Due to the excellent insulation performance, ethylene-propylene-diene monomer (EPDM) is used as cable accessories. To obtain EPDM materials with high dielectric breakdown strength (DBS), special polar molecules and chemistry grafting/crosslinking technique are used in this paper. In this paper, we choose Maleic anhydride (MAH) as an additive to introduce deep traps, which generates an increase in dielectric breakdown strength(DBS) and a decrease in conductivity. The result shows that MAH molecules can be grafted onto EPDM molecular chains in the process of cross-linking. Thermal stimulation currents (TSC) tests and the first-principles calculations consistently demonstrate that MAH can introduce deep charge traps, inhibiting migration of carriers, and increasing the DBS of EPDM. The grafting weight of MAH is small, which does not affect the process properties of the material.
Fast Computation Method of Energization Overvoltage in Cable Lines Based on Numerical Inverse Laplace Transform
Authors: Wang Hanfeng , Gu Borui , Zhu Guozhu , Lin Tao , Zhao Xuefeng , Duan Wei 
Published: February 2023

Abstract
Currently, the research on the energization overvoltage in cable lines is mainly realized through simulation calculation. However, the operation process is complex and the computation speed is slow when using the simulation software to calculate the energization overvoltage in the whole line. This paper presents a numerical calculation method of energization overvoltage in the entire cable line, which can greatly improve the calculation speed, simplify the operation process and have accurate calculation results. The method is based on transmission line theory, modal theory, transmission line equation’s complex frequency domain solution and Numerical Inverse Laplace Transform (NILT). This method first performs phase-to-mode conversion on the cable line and converts the mutually coupled cable conductors into mutually independent propagation modes. Furthermore, each independent propagation mode is conducted by Laplace Transform to obtain the complex frequency domain of its voltage. Finally, after the NILT is performed on the voltage complex frequency domain solution of each propagation mode and the time domain solution is obtained, the energization overvoltage of the full cable is obtained through the inverse phase-to-mode conversion. This method is applied to a 330kV cable line, and the calculation speed is significantly improved. The overvoltage calculation results have a small error compared to the obtained results using the simulation software, indicating that the method has high accuracy.
Design and application of double stove wires high-temperature furnace in high-temperature creep rupture test
Authors: Yang Leigang , Sun Jisong , Wang Weiguo 
Published: February 2023

Abstract
This paper presented a high-temperature furnace with double electric stove wires for the test of high-temperature creep rupture, adopted the 5 mm electric stove wire in diameter, and the wires are made up of the working stove wire and the alternate stove wire. When the tester system detects the working stove wire is fractured, it will automatically and quickly switch the power supply circuit from the working stove wire to the alternate stove wire. Then the alternate stove wire starts to heat to keep the high-temperature furnace working, reducing the loss caused by the interruption of the test on account of the fractured stove wire. Experimental result indicates that the high-temperature furnace with double electric stove wires can solve the problem that when the stove wire is fractured, the test is difficult to proceed for a long time and high-temperature creep rupture test with the classical high-temperature furnace. Besides, the 5 mm in diameter electric stove wire can also meet the temperature control on the ultra-high-temperature (such as 1200 °C) Creep test.