bluuebunny/crossref_metadata_2025_split huggingface dataset:
Average relative flow of single-wing labyrinth drip irrigation tape based on projection pursuit regression
Authors: Tao Hongfei , Tao Juanqin , Li Qiao , Aihemaiti Mahemujiang , Jiang Youwei , Yang Wenxin , Wei Jianqun 
Published: May 2022

AbstractThe hydraulic performance of single-wing labyrinth drip irrigation tapes under the coupling effect of water and fertilizer affects the operating efficiency of the entire drip irrigation system. In this study, three types of single-wing labyrinth drip irrigation tapes were studied. We evaluated the average relative flow of each type and conducted indoor uniform orthogonal tests of three factors, namely, fertilizer concentration, sediment content, and operating pressure. The results showed that the order of the factors affecting the average relative flow of single-wing labyrinth drip irrigation tape was sediment content > fertilizer concentration > operating pressure. The projection pursuit regression (PPR) models of the average relative flow of three types of single-wing labyrinth drip irrigation tapes (H1, H2, and H3) were established. The root mean square errors (nRMSE) of these three models were 0.66%, 0.74%, 0.34%, respectively, indicating their excellent prediction performance. The optimal performance of the three types of tapes were obtained when the fertilizer concentration was 0.6 g/L, the sediment content was 1 g/L, and the operating pressure was 40 kPa. Under the optimal condition, the average relative flows of H1-type, H2-type, and H3-type were 0.792, 0.764, and 0.700, respectively.
Silencing GOLGA8B inhibits cell invasion and metastasis by suppressing STAT3 signaling pathway in lung squamous cell carcinoma
Authors: Li Zhanzhan , Li Yanyan , Li Na , Shen Liangfang , Liu Aibin 
Published: May 2022

AbstractChanges to some Golgi subfamily member proteins are reported to be involved in tumor metastasis. However, the functional role and potential mechanism of the Golgi A8 family member B (GOLGA8B) in lung squamous cell carcinoma (LUSC) remains unknown. In the present study, GOLGA8B expression was detected using qRT-PCR, Western blot, and immunohistochemistry (IHC). In vivo animal experiments and in vitro functional assays were performed to explore the function of GOLGA8B in LUSC. Luciferase assays were performed to investigate the underlying targets of GOLGA8B in LUSC. GOLGA8B was shown to be highly expressed in LUSC metastasis tissue, and significantly associated with the distant metastasis-free survival of LUSC patients. Loss-of-function assays indicated that silencing GOLGA8B suppressed LUSC cell tumorigenesis in vivo and weakened in vitro invasion and migration. GOLGA8B silencing-induced inhibition of invasion and migration was associated with the inactivation of STAT3 signaling. Importantly, these results showed that the number of circulating tumor cells (CTCs) was markedly higher in the GOLGA8B silencing group than in the control vector group. GOLGA8B expression was positively associated with p-STAT3 expression in LUSC tissue. Study findings revealed a novel mechanism by which GOLGA8B promotes tumor metastasis in LUSC cells and suggests that this protein could be a promising target for antitumor metastasis therapy in LUSC patients.
Design of impedance matching network based on optimized real frequency algorithm
Authors: Bai Bo , Chen Riliang , Yuan Kai , Tang Rongxin , Zhao Ziyang , Lin Hai , Wang Yuhao , Deng Xiaohua 
Published: May 2022

AbstractIn the recent couple of decades, some multifunctional spaceborne active radars had been launched. Those radars used to be broadband radars using dipole transmitting antennas. The odd‐order resonant frequency of the antenna does not completely cover the operating frequency of the entire radar, so this may cause the antenna's radiation efficiency to deteriorate. The typical method to solve this problem was to design an impedance matching network system for broadband antennas to achieve a good voltage standing wave ratio and transmit power gain. In this paper, a new optimized real‐frequency method was designed, and a 0.4‐meter dipole antenna was tested before and after impedance matching. The measured results showed that the impedance matching network obtained by the optimized real‐frequency method proposed in this paper can improve the antenna radiation efficiency, and can effectively reduce the standing wave ratio to avoid damage to the transmitter caused by high echo power.
Improved coordinated control for thyristor controlled series compensation and generator excitation
Authors: Li Jian , Zhao Zhengnan , Su Qingyu 
Published: May 2022

AbstractThis article improves the coordinated passivation control strategy of a single machine infinite bus system with generator excitation and thyristor controlled series compensation. First, in the traditional coordinated passivation control strategy, class − κ functions and an integral term are introduced to improve the convergence speed and reduce the steady‐state error of the system. Furthermore, an adaptive control method based on sliding mode is used to design adaptive laws for uncertain parameters and external disturbances and simplify the controller form. Finally, the simulation results show that compared with the traditional coordinated passivation method, the proposed controller has stronger robust adaptability and improves the convergence rate and transient performance of the system.
Simulation and experimental analysis of three‐dimensional temperature distribution of ±400‐kV converter transformer valve‐side resin impregnated paper bushing under high current
Authors: Xie Gengsheng , Shi Shifeng , Wang Qingyu , Liu Peng , Peng Zongren 
Published: May 2022

AbstractIn order to cope with the current engineering demand for increasing the current‐carrying capacity of resin impregnated paper (RIP) bushing, an optimization scheme of RIP bushing was proposed in this paper. Simulation and experimental studies were carried out to verify the rationality of the scheme. An improved simulation method was proposed. To ensure as much accuracy as possible, the physical model of simulation considers the influence of heat conduction, thermal convection and thermal radiation process according to the actual operation environment. To boost the computational efficiency, the improved method simplified the relationship between temperature and heating power of the current‐carrying conductor as a fitting formula to avoid the iterative calculation between electromagnetic field simulation and temperature field simulation. The temperature rise test was carried out according to the engineering requirement and the standard international electro technical commission (IEC) 60137:2008. The simulation and experimental results show that the RIP bushing can carry a current with the heating power of its conductor equivalent to that generated by a 50‐Hz current of 6736 A while running in a converter station. It is a breakthrough of the current‐carrying capacity of high voltage bushing. Meanwhile, the regularity of temperature distribution of the RIP bushing was discussed.
Study on the energy stability region of DFIG‐integrated power system with virtual inertia
Authors: Ma Jing , Zhou Yi , Shen Yaqi , Du Yanling , Wang Jingran , Sun Sujuan , Huang Yuanyan , Zhao Shuqiang 
Published: May 2022

AbstractCurrently available research on the oscillatory stability of doubly‐fed induction generator (DFIG) integrated power system can hardly depict the dynamic characteristics of DFIGs with inertia support capability. The dynamic energy stability region of DFIG‐integrated power system with virtual inertia is constructed in this paper. First, a dynamic model of the wind farm is built and the dynamic energy function of DFIG during oscillation is derived. The dissipation energy model of DFIG‐integrated power system is established, and the functional relationship between the dissipation energy and the critical energy of the system is explored. Then, the dynamic energy stability region of DFIG‐integrated power system is constructed according to the energy curve formed by the critical energy points. Based on this, the effects of the virtual inertia and PLL control parameters on the energy stability region are revealed. Simulation tests performed in RTDS verify that, the proposed method is applicable to the system with multiple oscillation modes. It can effectively evaluate the tolerance of the system to disturbances, and can quantitatively analyze the effects of the control parameters on the energy stability regions of intra‐area and inter‐area oscillation modes.
Retracted: Robotic Process Automation use cases in academia and early implementation experiences
Authors: Gupta Ankur , Prabhat Purnendu , Sawhney Sahil , Gupta Rajesh , Tanwar Sudeep , Kumar Neeraj , Shabaz Mohammad 
Published: May 2022

AbstractRetraction: [Ankur Gupta, Purnendu Prabhat, Sahil Sawhney, Rajesh Gupta, Sudeep Tanwar, Neeraj Kumar, Mohammad Shabaz, Robotic Process Automation use cases in academia and early implementation experiences, IET Software 2022 (https://doi.org/10.1049/sfw2.12061)].The above article from IET Software, published online on 19 May 2022 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the Editor‐in‐Chief, Hana Chockler, the Institution of Engineering and Technology (the IET) and John Wiley and Sons Ltd. This article was published as part of a Guest Edited special issue. Following an investigation, the IET and the journal have determined that the article was not reviewed in line with the journal’s peer review standards and there is evidence that the peer review process of the special issue underwent systematic manipulation. Accordingly, we cannot vouch for the integrity or reliability of the content. As such we have taken the decision to retract the article. The authors have been informed of the decision to retract.
Water, hydrogen cyanide, carbon monoxide, and dust production from distant comet 29P/Schwassmann-Wachmann 1
Authors: Bockelée-Morvan D. , Biver N. , Schambeau C. A. , Crovisier J. , Opitom C. , de Val Borro M. , Lellouch E. , Hartogh P. , Vandenbussche B. , Jehin E. , Kidger M. , Küppers M. , Lis D. C. , Moreno R. , Szutowicz S. , Zakharov V. 
Published: May 2022

Context. 29P/Schwassmann-Wachmann 1 is a distant Centaur/comet, showing persistent CO-driven activity and frequent outbursts.
Aims. We aim to better characterize its gas and dust activity from multiwavelength observations performed during outbursting and quiescent states.
Methods. We used the HIFI, PACS and SPIRE instruments of the Herschel space observatory on several dates in 2010, 2011, and 2013 to observe the H2O 557 GHz and NH3 573 GHz lines and to image the dust coma in the far-infrared. Observations with the IRAM 30 m telescope were undertaken in 2007, 2010, 2011, and 2021 to monitor the CO production rate through the 230 GHz line, and to search for HCN at 89 GHz. The 70 and 160 µm PACS images were used to measure the thermal flux from the nucleus and the dust coma. Modeling was performed to constrain the size of the sublimating icy grains and to derive the dust production rate.
Results. HCN is detected for the first time in comet 29P (at 5σ in the line area). H2O is detected as well, but not NH3. H2O and HCN line shapes differ strongly from the CO line shape, indicating that these two species are released from icy grains. CO production rates are in the range (2.9–5.6) × 1028 s−1 (1400–2600 kg s−1). A correlation between the CO production rate and coma brightness is observed, as is a correlation between CO and H2O production. The correlation obtained between the excess of CO production and excess of dust brightness with respect to the quiescent state is similar to that established for the continuous activity of comet Hale-Bopp. The measured Q(H2O)/Q(CO) and Q(HCN)/Q(CO) production rate ratios are 10.0 ± 1.5 % and 0.12 ± 0.03 %, respectively, averaging the April-May 2010 measurements (Q(H2O) = (4.1 ± 0.6) × 1027 s−1, Q(HCN) = (4.8 ± 1.1) × 1025 s−1). We derive three independent and similar values of the effective radius of the nucleus, ~31 ± 3 km, suggesting an approximately spherical shape. The inferred dust mass-loss rates during quiescent phases are in the range 30–120 kg s−1, indicating a dust-to-gas mass ratio <0.1 during quiescent activity. We conclude that strong local heterogeneities exist on the surface of 29P, with quenched dust activity from most of the surface, but not in outbursting regions.
Conclusions. The volatile composition of the atmosphere of 29P strongly differs from that of comets observed within 3 au from the Sun. The observed correlation between CO, H2O and dust activity may provide important constraints for the outburst-triggering mechanism.
Sustainable transition of the primary steel production: Carbon footprint studies of hot-rolled coil according to ISO 14067
Authors: Suer Julian , Traverso Marzia , Ahrenhold Frank 
Published: May 2022

A shift away from traditional carbon-based towards a hydrogen-based steel production has to be stepwise so that technological challenges can be solved simultaneously to various other challenges like the evolution of green markets, political framework as well as the creation of hydrogen supply.
First bridge technologies towards hydrogen-based steelmaking are crucial to generate a stable demand for hydrogen so that hydrogen supply can follow. Injection of hydrogen into existing blast furnaces is a prominent example to reduce greenhouse-gas emissions without the ambition to reach complete carbon neutrality.
A subsequent next step on the way towards climate neutrality are modern Direct reduction units. This technology is able to reduce Iron oxides by natural gas and hydrogen, respectively. Within the existing plants Direct reduction units can be incorporated in various ways over time, thus offering a gradual and in the end complete transition to hydrogen and electricity based production.
Since LCA studies provide crucial input for political and market-economy decision-making, the LCA community is of great importance for giving direction of transformation processes. Like other industries, the steel industry needs an allocation approach for greenhouse gas emission savings to evolve green markets, of which the methodology shall be discussed within the life cycle community.
The current study presents carbon footprint assessments (ISO 14067) of hot-rolled coil for different future production scenarios. The following production routes are investigated:
- Conventional blast furnace – basic oxygen furnace route
- Injection of H2 into a blast furnace
- Input of H2-based direct reduced iron (DRI) into a blast furnace
- H2-based direct reduction combined with electrically melting from renewable energy.
Comparative study on the fertility and outcrossing characteristics of new dual-purpose genic male-sterile rice in China
Authors: Chen Jing , Chen Yan , Luo Yuping , Wu Yanran , Peng Yan , Mao Dandan , Liang Manzhong , Dai Xiaojun , Chen Liangbi 
Published: May 2022

The widespread application of ‘two-line’ hybrid rice, based on temperature- and photoperiod-sensitive genic male-sterile lines, plays an important role in ensuring global food security. Such lines are fertile in short-day/low-temperature conditions when used for self-breeding, and sterile in long-day/high-temperature conditions when used for hybrid seed production. However, fertility instability and low hybrid seed production of sterile lines are urgent problems. The aim of this study was to increase the stability of pollen sterility by studying the critical sterile-inducing temperature and stigma vitality of 97 newly selected male-sterile lines in China from 2017 to 2020. Sterility gene source analysis showed that 89.7% of the materials contained the tms5 sterile gene. After 6 days of treatment at 23.5°C during the reproductive period, 42 male-sterile lines were sterile. After 10 days of treatment at 23.5°C, the sterility of 12 sterile lines remained stable, indicating a high level of safety for hybrid seed production. After 10 days of low-temperature treatment at 19°C, the fertile pollen rate of 47 of the 97 sterile lines was >70%, indicating a high level of seed reproduction safety. Only six of these 47 male-sterile lines could maintain low fertility after 10 days of treatment at 23.5°C, indicating that they could be used safely for both hybrid seed production and sterile line reproduction. The results of delayed pollination showed that among the six lines, only Zhong 7S had high stigma vitality, and BYXA1S and H10S-2 had medium stigma vitality. Therefore, those three sterile lines have the potential for safe hybrid seed production and high-yield seed reproduction. Based on our research, we propose a new breeding standard of dual-purpose male-sterile lines to promote the development of two-line hybrid rice.
Structural insights into galanin receptor signaling
Authors: Jiang Wentong , Zheng Sanduo 
Published: May 2022

SignificanceGalanin exerts various physiological functions through galanin receptors, including antinociceptive activity, depression, and sleep. Here, we reveal a distinct binding mode of galanin peptide in galanin receptors from that of the published structures of peptide-bound GPCRs. Moreover, our work shows that the neuromodulator zinc ion negatively modulates galanin signaling in the central nervous system and further advances our understanding of mechanisms of G protein selectivity of GPCRs. These structures will provide a framework for rational design of ligands targeting GALRs for potential therapeutic applications.
Genetic polymorphisms related to muscular strength and flexibility are associated with artistic gymnastic performance in the Japanese population
Authors: Kumagai Hiroshi , Kaneko Tomoko , Shintake Yuko , Miyamoto‐Mikami Eri , Tomita Hiroyuki , Fukuo Makoto , Kawai Wataru , Harada Mutsumi , Kikuchi Naoki , Kamiya Nobuhiro , Hirata Kosuke , Zempo Hirofumi , Maeda Seiji , Miyamoto Naokazu , Fuku Noriyuki 
Published: May 2022

ABSTRACTThis study aimed to examine how genetic polymorphisms related to muscular strength and flexibility influence artistic gymnastic performance in an attempt to identify a novel polymorphism associated with flexibility. In study 1, the passive straight‐leg‐raise (PSLR) score and aromatase gene CYP19A1 rs936306 polymorphism, a key enzyme for estrogen biosynthesis, were assessed in 278 individuals. In study 2, athletes (281 gymnasts and 1908 other athletes) were asked about their competition level, and gymnasts were assessed using the difficulty score (D‐score) for each event. Muscular strength‐ (ACTN3 R577X rs1815739 and ACE I/D rs4341) and flexibility‐related (ESR1 rs2234693 T/C and CYP19A1 rs936306 C/T) genetic polymorphisms were analyzed. In study 1, males with the CYP19A1 CT + TT genotype showed significantly higher PSLR scores than those with the CC genotype. In study 2, male gymnasts with the R allele of ACTN3 R577X showed a correlation with the floor, rings, vault, and total D‐scores. In addition, male gymnasts with the C allele of ESR1 T/C and T allele of CYP19A1 C/T polymorphisms were correlated with the pommel horse, parallel bars, horizontal bar, and total D‐scores. Furthermore, genotype scores of these three polymorphisms correlated with the total D‐scores and competition levels in male gymnasts. In contrast, no such associations were observed in female gymnasts. Our findings suggest that muscular strength‐ and flexibility‐related polymorphisms play important roles in achieving high performance in male artistic gymnastics by specifically influencing the performance of events that require muscular strength and flexibility, respectively.Highlights
Estrogen‐related CYP19A1 polymorphism is a novel determinant of flexibility in males.
Muscular strength‐ and flexibility‐related polymorphisms play important roles in high performance in male artistic gymnastics.
Genotypes of ACTN3 R577X, ESR1 rs2234693, and CYP19A1 rs936306 may contribute to training plan optimization and event selection in artistic gymnastics.
Doping-dependent nucleation of basal plane dislocations in 4H-SiC
Authors: Liu Xiaoshuang , Wang Rong , Zhang Junran , Lu Yunhao , Zhang Yiqiang , Yang Deren , Pi Xiaodong 
Published: May 2022

Abstract
Basal plane dislocations (BPDs) are one of the most harmful dislocations in 4H silicon carbide (4H-SiC). Understanding the nucleation of BPDs is the basis of reducing the density of BPDs in 4H-SiC. In this work, we investigate the nucleation mechanism of BPDs, as well as the effect of doping on the nucleation of BPDs in 4H-SiC using nanoindentation. It is found that the shear stress plays a dominant role in the nucleation of BPDs in undoped 4H-SiC. This indicates that the shear component of the thermal stress during the growth of 4H-SiC single crystals and that of the mechanical stress during the processing of 4H-SiC wafers both give rise to the nucleation of BPDs. Nitrogen (N) doping is found to facilitate the nucleation of BPDs and decrease the shear stress required for the nucleation of BPDs. In contrast, vanadium (V) doping hinders the nucleation of BPDs, which promotes the polymorph transition from 4H-SiC to 3C-SiC.
The best conditions for the nucleation of carbon nanoparticles in laser-induced plasma
Authors: Kaczmarek Agata , Hoffman Jacek 
Published: May 2022

Abstract
Despite the existence of many more efficient methods of producing carbon nanoparticles, ablation of a carbon target by a laser pulse remains important. It enables studying the bare properties of nanoparticles, not contaminated with reagents or reaction products. The present work analyses the mechanisms of nucleation and growth of nanoparticles in carbon vapours generated during ablation of graphite with a nanosecond laser pulse. The role of both the homogeneous and the heterogeneous (ions) nucleation was investigated, defining the areas of their occurrence. It has been shown that the most favourable conditions are high pressure of the order 1 GPa and relatively low temperature of about 15 000 K. Such conditions are obtainable when ablation occurs in a liquid and the fluence of the laser pulse is low, exceeding the ablation threshold about 2.7 times only. The resulting nanoparticles are relatively homogeneous and have a diameter of approximately 2.5–5 nm.
Peak profile analysis, electrical, dielectric behaviour and defect mediated yellow photoluminescence of zinc oxide nanostructures
Authors: Samanta Pijus Kanti , Rana Naba Kumar , Kar Bappa Sona 
Published: May 2022

Abstract
A simple chemical method has been used to synthesize pure and crystalline ZnO nanoparticles. XRD study revealed hexagonal unit-cell with crystallite size 18.32 nm. Non-Debye type relaxation mechanism leads to an additional constant-phase-contribution to the equivalent parallel RC-network. The grain-boundary effect to the conductivity is found to be very large. The dc conductivity was calculated to be 4.9 × 10−8 (Ω cm)−1. The high loss-tangent at lower frequency is contributed by the large grain boundary effect of the material. The material is highly transparent in the visible window of wavelength with wide and direct band gap of 3.53 eV. The highly intense photoluminescence at 583 nm is attributed to oxygen related defects (interstitials or vacancy).