bluuebunny/crossref_metadata_2025 huggingface dataset:
The nucleoplasmic interactions among Lamin A/C-pRB-LAP2α-E2F1 are modulated by dexamethasone
Authors: Ricci Anastasia , Orazi Sara , Biancucci Federica , Magnani Mauro , Menotta Michele
Published: May 2021

Ataxia telangiectasia (AT) is a rare genetic neurodegenerative disease. To date, there is no available cure for the illness, but the use of glucocorticoids has been shown to alleviate the neurological symptoms associated with AT. While studying the effects of dexamethasone (dex) in AT fibroblasts, by chance we observed that the nucleoplasmic Lamin A/C was affected by the drug. In addition to the structural roles of A-type lamins, Lamin A/C has been shown to play a role in the regulation of gene expression and cell cycle progression, and alterations in the LMNA gene is cause of human diseases called laminopathies. Dex was found to improve the nucleoplasmic accumulation of soluble Lamin A/C and was capable of managing the large chromatin Lamin A/C scaffolds contained complex, thus regulating epigenetics in treated cells. In addition, dex modified the interactions of Lamin A/C with its direct partners lamin associated polypeptide (LAP) 2a, Retinoblastoma 1 (pRB) and E2F Transcription Factor 1 (E2F1), regulating local gene expression dependent on E2F1. These effects were differentially observed in both AT and wild type (WT) cells. To our knowledge, this is the first reported evidence of the role of dex in Lamin A/C dynamics in AT cells, and may represent a new area of research regarding the effects of glucocorticoids on AT. Moreover, future investigations could also be extended to healthy subjects or to other pathologies such as laminopathies since glucocorticoids may have other important effects in these contexts as well.
Meta-analysis and metaregression of risk factors associated with mortality in hip fracture patients during the COVID-19 pandemic
Authors: Raheman Firas J. , Rojoa Djamila M. , Nayan Parekh Jvalant , Berber Reshid , Ashford Robert
Published: May 2021

Incidence of hip fractures has remained unchanged during the pandemic with overlapping vulnerabilities observed in patients with hip fractures and those infected with COVID-19. We aimed to investigate the independent impact of COVID-19 infection on the mortality of these patients. Healthcare databases were systematically searched over 2-weeks from 1st–14th November 2020 to identify eligible studies assessing the impact of COVID-19 on hip fracture patients. Meta-analysis of proportion was performed to obtain pooled values of prevalence, incidence and case fatality rate of hip fracture patients with COVID-19 infection. 30-day mortality, excess mortality and all-cause mortality were analysed using a mixed-effects model. 22 studies reporting 4015 patients were identified out of which 2651 (66%) were assessed during the pandemic. An excess mortality of 10% was seen for hip fractures treated during the pandemic (OR 2.00, p = 0.007), in comparison to the pre-pandemic controls (5%). Estimated mortality of COVID-19 positive hip fracture patients was four-fold (RR 4.59, p < 0.0001) and 30-day mortality was 38.0% (HR 4.73, p < 0.0001). The case fatality rate for COVID-19 positive patients was 34.74%. Between-study heterogeneity for the pooled analysis was minimal (I2 = 0.00) whereas, random effects metaregression identified subgroup heterogeneity for male gender (p < 0.001), diabetes (p = 0.002), dementia (p = 0.001) and extracapsular fractures (p = 0.01) increased risk of mortality in COVID-19 positive patients.
Comparison of bipolar plasmakinetic resection of prostate versus photoselective vaporization of prostate by a three year retrospective observational study
Authors: Cheng Xu , Qin Chuying , Xu Peng , Li Yijian , Peng Mou , Wu Shuiqing , Ren Da , Zhou Lizhi , Wang Yinhuai
Published: May 2021

Comprehensive evaluation of photoselective vaporization of the prostate (PVP) versus plasmakinetic resection of the prostate (PKRP) in treating benign prostatic hyperplasia (BPH) is inadequate. This single-centre, retrospective observational study was designed to compare their efficacy, complications and sexual function. A total of 215 patients under PVP or PKRP were included in the study, propensity score matching (PSM) was performed to match the baseline characteristics of the two groups, and perioperative and three-year follow-up data were compared between them. Finally, 120 patients (60 for PVP and 60 for PKRP) were matched after PSM. Compared with the PKRP group, the intraoperative haemoglobin loss was lower (9.08 vs 13.75 g/L, P < 0.001) and the duration of catheterization and postoperative hospital stay were shorter (2.97 vs 4.10 day, P < 0.001; 3.95 vs 5.13 day, P < 0.001, respectively), but the operation time was longer (56.72 vs 49, 90 min, P < 0.001) in the PVP group. Urination measurements were improved for both groups after surgery, although no significant differences were found between them during follow-up. Sexual function after surgery was partly increased; however, frequent retrograde and discomfortable ejaculation occurred in both groups. In addition, dysuria incidence and retreatment were higher in the PVP group at 12 months. In conclusion, PVP is safe and effective in relieving BPH-related lower urinary tract symptoms with less perioperative blood loss and earlier recovery without inferior sexual function effects. However, the study is potentially affected by residual unmeasured confounding.
Role of miR-506 in ulcerative colitis associated with primary sclerosing cholangitis
Authors: Kempinska-Podhorodecka Agnieszka , Adamowicz Monika , Ostrycharz Ewa , Chmielarz Mateusz , Wójcicki Maciej , Milkiewicz Piotr , Milkiewicz Malgorzata
Published: May 2021

Primary sclerosing cholangitis (PSC) is commonly accompanied by ulcerative colitis (UC). MicroRNA-506 modulates expression of genes which are essential for sphingosine-mediated signaling pathway and intestinal mucosa protection. We investigated whether miR-506 and its target genes are involved in phenotypic presentations of colonic inflammation and/or neoplasia. We analyzed serum and colon tissue samples collected from patients with PSC, PSC with concurrent UC (PSC + UC), UC alone, and healthy controls (n = 10 each). MiR-506 was substantially upregulated in ascending colons of PSC and PSC + UC patients, in contrast to sigmoid colons of PSC and UC patients. Upregulation of miR-506 was associated with inhibition of SPHK1, AE2, InsP3R3, and p53. Colonic suppression of miR-506 presented in UC was accompanied by substantially increased DNMT1, SPHK1, and S1P lyase expressions. A functional in vitro analysis in Caco-2 cells showed that the induction of miR-506 activity by miR-506 mimic or GDCDA bile acid suppressed, whereas inhibition of miR-506 by miR-506 inhibitor or lipopolysaccharide (LPS) upregulated the expression of the examined target genes. A different phenotypic presentation of colitis may be related to miR-506 expression. In ascending colons with PSC + UC, upregulation of miR-506 may result in failure of bicarbonate secretion and inhibition of p53, which predisposes to pro-tumorigenic transformation. In contrast, downregulation of miR-506 enhances S1P production, leading to pro-inflammatory signaling.
One-step synthesis of visible light CO2 reduction photocatalyst from carbon nanotubes encapsulating iodine molecules
Authors: Al-zubaidi Ayar , Kobayashi Kenta , Ishii Yosuke , Kawasaki Shinji
Published: May 2021

We describe the synthesis and visible-light CO2 photoreduction catalytic properties of a three-component composite consisting of AgI, AgIO3, and single-walled carbon nanotubes (SWCNTs). The catalyst is synthesized by immersing SWCNTs encapsulating iodine molecules in AgNO3 aqueous solution, during which neutral iodine (I2) molecules encapsulated in SWCNTs transform disproportionately to I5+ (AgIO3) and I− (AgI), as revealed from the characterization of the composite by Raman spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. In addition, photoirradiation experiments using a solar-simulator (AM1.5G) showed that the obtained three-component composite works as a CO2 photoreduction catalyst under visible light despite the wide band gap of AgIO3, suggesting possible transfer of the visible light-excited electron from AgI via SWCNTs.
Publisher Correction: Delay in primordial germ cell migration in adamts9 knockout zebrafish
Authors: Carver Jonathan J. , He Yuanfa , Zhu Yong
Published: May 2021

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Author Correction: Unraveling the genetic origin of ‘Glera’, ‘Ribolla Gialla’ and other autochthonous grapevine varieties from Friuli Venezia Giulia (northeastern Italy)
Authors: Crespan Manna , Migliaro Daniele , Larger Simone , Pindo Massimo , Petrussi Carlo , Stocco Marco , Rusjan Denis , Sivilotti Paolo , Velasco Riccardo , Maul Erika
Published: May 2021

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Solvent effect on the 195Pt NMR properties in pyridonate-bridged PtIII dinuclear complex derivatives investigated by ab initio molecular dynamics and localized orbital analysis
Authors: Batista Patrick R. , Ducati Lucas C. , Autschbach Jochen
Published: May 2021

Ab initio molecular dynamics and relativistic DFT calculations were combined to provide a much more realistic computational model that reproduces the large magnitudes of the PtIII–PtIII NMR coupling constants and 195PtIII chemical shifts.
Mapping the distribution of double bond location isomers in lipids across mouse tissues
Authors: Ren Hanlin , Triebl Alexander , Muralidharan Sneha , Wenk Markus R. , Xia Yu , Torta Federico
Published: May 2021

By implementing the Paternò–Büchi reaction, we mapped lipids in model animal at double bond location level and the results indicated these isomers as potential tissue-specific markers.
BINOLated aminostyryl BODIPYs: a workable organic molecular platform for NIR circularly polarized luminescence
Authors: Jiménez Josué , Díaz-Norambuena Carolina , Serrano Sergio , Ma Shing Cho , Moreno Florencio , Maroto Beatriz L. , Bañuelos Jorge , Muller Gilles , de la Moya Santiago
Published: May 2021

An accessible BODIPY scaffold is highlighted as useful platform towards small-molecule organic emitters exhibiting CPL in the NIR region, even in water solution.
Filamentous chaperone protein-based hydrogel stabilizes enzymes against thermal inactivation
Authors: Xu Dawei , Lim Samuel , Cao Yuhong , Abad Abner , Kang Aubrey Nayeon , Clark Douglas S.
Published: May 2021

We report a filamentous chaperone-based protein hydrogel capable of stabilizing enzymes against thermal inactivation.
Reactivity of mono- and divalent aluminium compounds towards group 15 nanoparticles
Authors: Hauser Adrian , Münzfeld Luca , Roesky Peter W.
Published: May 2021

Reaction of nanoparticular arsenic and antimony with low-valent aluminum species resulted via one and two-electron reduction in a series of Al–As and Al–Sb clusters.
Theoretical investigations on the charge transport properties of anthracene derivatives with aryl substituents at the 2,6-position—thermally stable “herringbone” stacking motifs
Authors: Sun Xiao-Qi , Qin Gui-Ya , Lin Pan-Pan , Wang Jin , Fan Jian-Xun , Li Hui-Yuan , Ren Ai-Min , Guo Jing-Fu
Published: May 2021

The modification of the aryl substituent allows molecular packing along the long axis and is almost not slipped, and the main transport channels remain unchanged, exhibiting more isotropic 2D transport properties.
Machine learning classification of disrotatory IRC and conrotatory non-IRC trajectory motion for cyclopropyl radical ring opening
Authors: Maley Steven M. , Melville Jesse , Yu Spencer , Teynor Matthew S. , Carlsen Ryan , Hargis Cal , Hamilton R. Spencer , Grant Benjamin O. , Ess Daniel H.
Published: May 2021

Machine learning classification and feature importance provided analysis to compare disrotatory IRC versus controtatory non-IRC trajectory motion for electrocyclic cyclopropyl radical ring opening.
Chemically synthesized (Ag, Mn2O3)-codecorated ZnO nanoparticles for achieving superior visible light-induced photodegradation and enhanced gas sensing activity
Authors: Li Jing , Zhang Qiuping , Yuan Huan , Luo Kaiyi , Liu Yutong , Hu Wenyu , Xu Ming , Xu Shuyan
Published: May 2021

We synthesized (Ag, Mn2O3)-codecorated ZnO nanocomposites with strong visible light absorption, efficient photo-generated carrier separation, and exhibited excellent photocatalytic activity and gas sensing properties under visible light irradiation.
Dehydration of n-butanol on phosphate-modified carbon nanotubes: active site and intrinsic catalytic activity
Authors: Li Fan , Dai Xueya , Lu Xingyu , Wang Chao , Qi Wei
Published: May 2021

Dehydration of n-butanol (nB) to corresponding olefins (butene) is an important reaction route to realize efficient utilization of bulk bio-alcohols.
Flexible-spacer incorporated polymer donors enable superior blend miscibility for high-performance and mechanically-robust polymer solar cells
Authors: Lee Jin-Woo , Jeong Dahyun , Kim Dong Jun , Phan Tan Ngoc-Lan , Park Jin Su , Kim Taek-Soo , Kim Bumjoon J.
Published: May 2021

We develop an effective strategy to obtain polymer solar cells with high power conversion efficiency (17%) and remarkable mechanical robustness, by design of polymer donors with aliphatic flexible spacer incorporated into a rigid backbone.
Resolving isobaric interference towards the determination of 137Cs and 90Sr using laser-ionization mass spectrometry
Authors: Namitha J. , Maity U. K. , Subramanian G. G. S. , Manoravi P. , Joseph M. , Sivaraman N.
Published: May 2021

Resolving isobaric interference in situ using laser-ionization mass spectrometry (LIMS).
Fabrication of tunable, high-molecular-weight polymeric nanoparticles via ultrafast acoustofluidic micromixing
Authors: Zhao Shuaiguo , Huang Po-Hsun , Zhang Heying , Rich Joseph , Bachman Hunter , Ye Jennifer , Zhang Wenfen , Chen Chuyi , Xie Zhemiao , Tian Zhenhua , Kang Putong , Fu Hai , Huang Tony Jun
Published: May 2021

An acoustofluidic platform is developed to synthesize high-molecular-weight polymeric nanoparticles in a size- and structure-controlled manner, while eliminating polymer aggregation within the microchannel.
All-fiber pyro- and piezo-electric nanogenerator for IoT based self-powered health-care monitoring
Authors: Mahanty Biswajit , Ghosh Sujoy Kumar , Maity Kuntal , Roy Krittish , Sarkar Subrata , Mandal Dipankar
Published: May 2021

An all-fiber pyro- and piezo-electric nanogenerator for IoT based self-powered health-care monitoring has been presented.
Promoting the neural differentiation of embryonic stem cells by using thermosensitive nanocomposites
Authors: Cheng Shaoyu , Yu Fei , Lu Benben , Wang Hongwei , Yuan Lin
Published: May 2021

Temperature-sensitive heparin mimic copolymer modified gold nanoparticles (AuNPs–pNMS) can efficiently promote the neural differentiation of embryonic stem cells.
A reduced graphene oxide/bismuth vanadate composite as an efficient piezocatalyst for degradation of organic dye
Authors: Kumar Manish , Singh Gurpreet , Vaish Rahul
Published: May 2021

Reduced graphene oxide (rGO)/bismuth vanadate (BiVO4) composites with varying rGO content (0, 1, 2, 3, and 5 wt%) were synthesized and explored for their piezocatalytic dye degradation performance.
Size-tunable and stable cesium lead-bromide perovskite nanocubes with near-unity photoluminescence quantum yield
Authors: Grisorio Roberto , Conelli Daniele , Fanizza Elisabetta , Striccoli Marinella , Altamura Davide , Giannini Cinzia , Allegretta Ignazio , Terzano Roberto , Irimia-Vladu Mihai , Margiotta Nicola , Suranna Gian Paolo
Published: May 2021

A suitable chemical approach for obtaining cesium lead-bromide perovskite nanocrystals ensures their size modulation while preserving the near-unity photoluminescence quantum yield.
High shear vortex fluidic morphologically controlled polysulfone formed under anhydrous conditions
Authors: Igder Aghil , Al-Antaki Ahmed Hussein Mohammed , Pye Scott J. , Keshavarz Alireza , Nosrati Ata , Raston Colin L.
Published: May 2021

Polysulfone (PSF) was prepared under anhydrous conditions in DMSO, under high shear in a vortex fluidic device (VFD) operating under confined mode thereby avoiding the use of chlorinated solvents, unlike in conventional batch processing.
Melanin nanoparticles as an actinide in vivo sequestration agent with radiation protection effect
Authors: Miao Yu , Sheng Jie , Wang Xiaomei , Shi Cen , Sun Qiwen , Liu Tonghuan , Diwu Juan
Published: May 2021

PEG grafted melanin nanoparticles exhibit codecorporation effect of U and Th as well as good ROS scavenging ability.
Preparation of some chromeno[4,3-d]pyrido[1,2-a]pyrimidine derivatives by ultrasonic irradiation using NiFe2O4@SiO2 grafted di(3-propylsulfonic acid) nanoparticles
Authors: Khalaj Mehdi , Taherkhani Mahboubeh , Kalhor Mehdi
Published: May 2021

NiFe2O4@SiO2 grafted di(3-propylsulfonic acid) was prepared by a facile method and characterized by XRD, FT-IR, SEM-EDX, TGA, and BET techniques.
Self-division of 2-D sheets in aromatic macrocycle assembly
Authors: Wang Yanqiu , Feng Xiaopeng , Lee Myongsoo
Published: May 2021

2-D Sheets from macrocycle assembly undergoes reversible lengthwise division in response to temperature change.
Electrochemical sensing of blood proteins for mild traumatic brain injury (mTBI) diagnostics and prognostics: towards a point-of-care application
Authors: Pankratova Nadezda , Jović Milica , Pfeifer Marc E.
Published: May 2021

Critical review on the electrochemical (EC) protocols suggested in the literature for the quantification of protein biomarkers relevant to mild traumatic brain injury (mTBI).
A review on potential of natural products in the management of COVID-19
Authors: Chakravarti Rudra , Singh Rajveer , Ghosh Arijit , Dey Dhritiman , Sharma Priyanka , Velayutham Ravichandiran , Roy Syamal , Ghosh Dipanjan
Published: May 2021

In this review promising targets for drug development against SARS-CoV-2 and anti-viral activities of some of the known natural products (including plant secondary metabolites) are discussed.
Synthesis, characterization and cytotoxicity evaluation of a novel magnetic nanocomposite with iron oxide deposited on cellulose nanofibers with nickel (Fe3O4@NFC@ONSM-Ni)
Authors: Ghamari Kargar Pouya , Noorian Maryam , Chamani Elham , Bagherzade Ghodsieh , Kiani Zahra
Published: May 2021

A heterogeneous, magnetically recoverable nanocomposite, Fe3O4@NFC@ONSM-Ni(ii) was prepared by immobilization of a novel Ni(ii) Schiff base complex on Fe3O4@NFC nanoparticles followed by treatment with melamine.
A three-dimensional nanostructure of NiFe(OH)X nanoparticles/nickel foam as an efficient electrocatalyst for urea oxidation
Authors: Yang Xue-Li , Lv Ya-Wen , Hu Jun , Zhao Jing-Ru , Xu Guo-Yong , Hao Xiao-Qiang , Chen Ping , Yan Man-Qing
Published: May 2021

NiFe(OH)X nanoparticles/Ni foam as a high-performance UOR electrocatalyst was prepared by a facile and large-scale method.
Silver-incorporating peptide and protein supramolecular nanomaterials for biomedical applications
Authors: Abbas Manzar , Atiq Atia , Xing Ruirui , Yan Xuehai
Published: May 2021

The natural biomolecules of peptides and proteins are able to form elegant metal incorporating supramolecular nanomaterials through multiple weak non-covalent interactions.
Broadband and massive Stokes shift luminescence in fully inorganic 2D-layered perovskite CsPb2Cl5: single crystal growth and self-trapped exciton emission
Authors: Yao Qing , Zhang Jie , Wang Kaiyu , Jing Lin , Cheng Xiaohua , Shang Chenyu , Ding Jianxu , Zhang Weiwei , Sun Haiqing , Zhou Tianliang
Published: May 2021

Two-dimensional CsPb2Cl5 materials with broadband emission and self-trapped exciton emission have great potential in the field of optoelectronics.
Coûts de transaction dans les modes de commercialisation de l’anacarde au nord-ouest du Bénin
Authors: Degla Pamphile Kokou , Ahodode José Herbert
Published: May 2021

Du fait de son rôle dans l’obtention de revenus pour les paysans et de devises pour le pays, l’anacarde est une culture d’un fort intérêt économique et stratégique au Bénin. Sa commercialisation est cependant soumise à de nombreuses contraintes, dont les coûts de transaction qui font l’objet de la présente étude. En se basant sur un échantillon aléatoire de 122 producteurs choisis au nord-ouest du Bénin et en utilisant l’approche des coûts d’opportunité, l’efficacité transactionnelle des deux modes de commercialisation (individuelle et groupée) a été analysée. Il ressort des résultats que les producteurs supportent des coûts de transaction de 93 F CFA/kg dans le mode de vente individuelle contre seulement 43 F CFA/kg dans la vente groupée (1 € = 656 F CFA). Dans les deux modes, la composante majeure est constituée par les coûts de transaction ex ante (98 %) contre seulement 2 % pour les coûts ex post. Si les résultats montrent que la vente groupée a un avantage comparatif en termes de réduction des coûts de transaction, ce mode peine cependant à se développer et le mode individuel reste toujours dominant (62 %). Ce résultat ne corrobore pas l’idée généralement admise de préférence des acteurs pour le mode de coordination minimisant les coûts de transaction dans un processus d’échange. Il suggère la nécessité d’approfondir l’analyse de l’efficacité transactionnelle, en incluant l’analyse de la perception des producteurs sur le fonctionnement de chaque mode de commercialisation et sur l’importance des coûts de transaction liés à chacun.
An improved Bergeron differential protection for half-wavelength AC transmission line
Authors: Shao Pengfei , Li Yu , Fang Ruiming , Guo Xinghua
Published: May 2021

Half-wavelength AC transmission line has the characteristics of long transmission distance and high voltage level, and its fault characteristics are significantly different from conventional transmission line. In order to reduce the interference of distributed capacitive current on half-wavelength AC transmission line on the calculation of current differential protection, this paper proposes a new current differential protection scheme based on Bergeron model. In order to solve the problem of small differential current located at the midpoint when a short circuit fault occurs, a solution using different methods to calculate setting value in different areas is proposed. The protection can move quickly near the terminal and delay to act in the middle area. After simulation and verification on the PSCAD experimental platform, it is found that when there is a fault at both terminals of the line, the protection can quickly operate in about 10 ms; when fault occurs in the middle area, the protection can delay its operation. The experimental results show that the various actions and performance of the protection device can meet the requirements of safe operation of half-wavelength transmission line.
Study on preparation of metal-organic framework membrane and pore size adjustment method
Authors: Yang Hui , Zhang Jiaqi , He Huan
Published: May 2021

Metal-organic framework materials have the advantages of large specific surface area, high porosity, strong adjustability of framework structure, adjustable chemical and thermal properties, etc., and can be used as ideal membrane materials. In this paper, the preparation methods and conditions of several common metal-organic framework materials, as well as how to adjust the pore size, are reviewed, and the advanced membrane treatment technology is prospected.
Review of distributed energy storage aggregation technology under multi-energy interconnection
Authors: Ye Peng , Wang Shiyuan , Sun Feng , Zhang Mingli , Zhang Na
Published: May 2021

At present, with the rapid growth of intermittent renewable energy, volatile power supply is replacing controllable power supply, and the difficulty of real-time balance between supply and demand is increasing year by year. In the future, the continuous development and utilization of this new energy will make the development and innovation of distributed energy storage technology become the general trend. Firstly, this paper briefly introduces the principle of distributed energy storage and the basic principle of multi energy coordinated operation, and analyzes its advantages and disadvantages from the perspective of economic optimization and energy utilization maximization. Secondly, it analyzes the application status and shortcomings at home and abroad, and puts forward the direction and expectation of possible breakthrough. Aiming at the problem that distributed energy storage can not participate in peak load regulation, the feasibility of multi energy interconnection distributed energy storage aggregation technology is discussed.
Reliability Analysis of Photovoltaic charging Station of Electric vehicle considering the relationship between Photovoltaic output and charging load
Authors: Li Hengjie , Cao Xihuan , Li Hong , Ji Qingchun , Xu Jianrong , Yue Wenhua
Published: May 2021

The intermittency and randomicity of photovoltaic output will have a great influence on the reliability of photovoltaic charging station. Based on the photovoltaic output and charging load data of a photovoltaic charging station in our country, the reliability of photovoltaic charging station is evaluated. Firstly, the probability distributions of photovoltaic output and charging load are calculated respectively by using nonparametric kernel density estimation method. Secondly, the Copula function is optimized according to the correlation degree. Finally, a hybrid Copula function is constructed to describe the correlation between PV output and EV charging load, and an example is given to verify the reliability of the PV charging station.
Comprehensive Evaluation of Carrying Capacity in Distribution Network with Large-scale Electric Heating Equipment
Authors: Wu Dingchen , Xu Fei , Dong Biao , Tian Ran , Wei Mingshan , Ding Hengchun , Yi Zhonglin
Published: May 2021

In view of the power quality problems such as voltage fluctuation and transformer overload caused by large-scale access of electric heating equipment, the comprehensive evaluation index system and the evaluation method of the distribution network carrying capacity were proposed. Taking IEEE33 node system as an example, based on the tested node electricity load and thermal load demand, through the calculation of each evaluation index, influence of different electric heating modes on the distribution network carrying capacity was analysed and the rationality of the proposed evaluation method was verified. The results showed that using electric heat pump with thermal storage system for heating can reduce the peak voltage deviation, the network loss and further ensure the safe operation of power distribution network under the premise of satisfying the user’s thermal load demand and the stability of the distribution network.
A clustering method of Gas load based on FCM-SMOTE
Authors: Huang Dong Hong , Liu Dan , Wen Ming , Dong Xin Li , Wen Min , Zhao Xing Hao
Published: May 2021

For the design and planning of gas-fired boiler system, the load of gas-fired boiler is an important basic data. Load clustering analysis, combined with the application of data mining technology and gas boiler system, excavates the hidden load patterns in a large number of disordered and irregular loads, and classifies them, so as to solve many problems in gas boiler system. The current load clustering methods have more or less problems. The invention first carries out data PVA dimension reduction processing on the huge gas data, and then carries out cluster analysis. In the actual application of gas-fired boilers, the data objects we are faced with are usually unbalanced data sets. In order to solve the problem of sample imbalance, we use the FCM-SMOTE algorithm to oversample the clustered data to make the data set into a balanced data set.
Design of Data Acquisition System for Vehicle Driving Simulator
Authors: Xu Wanyou , Wu Dongsheng , Ping Lanlan
Published: May 2021

Data acquisition systems have a direct impact on interactivity and authenticity to the car driving simulator. According to the requirements of the vehicle driving simulator to complete the multi-channel data acquisition and processing with high speed and high precision, a set of real-time data acquisition system was designed. The system uses STM32F103ZET6 chip to process data acquisition, and communicates with the host computer through serial port. The experimental results show that the designed data acquisition system has good real-time performance, high accuracy and meets the expected functional requirements.
Application of Finnish energy saving and emission reduction technology in glass industry
Authors: Zhao Pingyuan , Zhang Xiujuan
Published: May 2021

Finland has formed a unique energy saving and emission reduction concept in the process of realizing the leap from agriculture to industrialization, which has been shown in the utilization of raw materials, optimizing fuel structure, recovering waste heat and waste disposal. These concepts and aspects have been widely used in the glass industry, from the early glass technology reform to the present stage of technological innovation for the development of Finnish glass industry to provide an important guarantee. Finland experience provides experience and reference for the development of glass industry in China, which has important strategic significance in the increasingly severe environment of energy crisis.
Preparation and performance study of hydrotalcites /PLA composites
Authors: Liu Hongbo , Huang Zhiyong , Chen Xiuzhu , Chen Yaxin , Lian Haitian , Li Chong
Published: May 2021

3D printing technology is known as the core technology of “the third industrial revolution”. Poly (lactic acid) (PLA) is a new type of biodegradable thermoplastic resin, which is renewable. It has a wide range of raw materials. It also has the properties of high strength, good biocompatibility, excellent mechanical properties, thermoplastic and transparency. Hydrotalcite (HT) was synthesized by coprecipitation method and modified to prepare the HT/PLA composites. The results show that the structure of HT is good. After KH550 surface modification, a large number of OH and Si-O groups are introduced into PLA surface. TG results show that the HT sample has good thermal stability. Compared with pure PLA, the glass transition temperature and crystallization temperature of HT / PLA composites decreases, while the melting temperature increases.
High stability gel electrolytes for long life lithium ion solid state supercapacitor
Authors: Chen Zhi , Li Junxiang , Wu Mengqiang , Liao Jiaxuan
Published: May 2021

Lithium ion capacitors with liquid electrolyte are prone to leakage, combustion, explosion and other dangerous accidents. To solve these problems, the solid gel separator prepared by polyvinylidene fluoride - six fluoropropene (PVDF-HFP) is used in this work to improve the safety and stability of lithium ion supercapacitors. The PVDF-HFP based gel separator was used to replace the commercial separator and electrolyte in the lithium ion capacitor. The solid-state lithium ion supercapacitor was matched with porous carbon (PC) and hard carbon (HC). The maximum energy density of the device is 148.76 wh/kg, even at the power density of 33.6 kW/kg, which still retains 20.6 wh/kg. In addition, 83.3% capacity of solid-state lithium-ion supercapacitor is retained after 8000 times of charge and discharge. The requirements of high power energy density, high cycle stability and high safety are realized.
Multi-objective operation optimization of regional integrated energy system based on NSGA-II algorithm
Authors: Xu Zheming , Hu Changbin , Lu Xiaojun
Published: May 2021

With the deepening of China’s energy market reform and the promotion of integrated energy services, the regional integrated energy system becomes an important development direction of energy supply system. In order to maximize the economic efficiency and reduce the air pollutant emission of the regional integrated energy system, the distributed power generation module and the cooling-heat-power (CCHP) triple-supply module are formed into a model, and the power balance, equipment capacity and environmental factors of the system are constrained with the objective function of minimizing the daily operation cost of the system as well as minimizing the air pollutant emission. Based on the mathematical system framework model and the optimal operation control strategy, the NSGA-II algorithm is used to solve the multi-objective programming model to obtain the Pareto solution set, and the hourly output of the optimal operation of the system equipment with both economic and environmental benefits is obtained. The results show that the daily operating costs and pollutant emissions of the district energy system are significantly reduced compared with those without optimization, which effectively solves the problems of low operating efficiency and serious environmental pollution of the district energy system and achieves the optimal operation with both economic and environmental benefits.
Research on the Visual Design of Data Charts Based on the COVID-19 Epidemic
Authors: Feng Qiu , Fuchen Ren
Published: May 2021

Purpose The sudden outbreak of the novel coronavirus has caused varying degrees of damage to China and the world. In today’s era of information explosion, data and information are the driving force for decision-making. The improvement of medical treatment and public health systems is the most fundamental, but what a citizen needs is an intuitive and clear “seeing” the development of the epidemic. The correct trend, an accurate view and understanding of the epidemic requires us to use visual design methods to present it to the public, which is helpful to establish a correct understanding of the psychological construction of anti-epidemic at the social level.
VSG-Based Parameter Adaptive Control Strategy
Authors: Jianyi Guo , Youping Fan
Published: May 2021

As a large number of converters composed of power electronic devices are connected to the grid, power system has gradually decreased stability. How to increase dynamic response of the converter has become one of the research hotspots. Virtual synchronous generator technology (VSG) can endow the converter with moment of inertia and damping characteristics, thereby enhancing dynamic response, but the traditional VSG technology cannot achieve the optimal control effect. To solve this problem, an adaptive control strategy is proposed, which takes logical combination of system angular velocity and frequency change as the real-time change condition, with exponential function as the change expression. Finally, this paper uses MATLAB / Simulink to compare the method in this paper with several existing typical control strategies.
The Predicament and Countermeasures of Rural Logistics under China’s E-commerce Environment
Authors: Tang Fuxing , Liu Quanhong , Wang Hongping
Published: May 2021

Although the improvement of rural network infrastructure construction has provided unprecedented opportunities for e-commerce development in China’s rural areas, the current development speed of rural areas is still relatively slow. Thus this paper discusses the predicament of rural logistics under China’s e-commerce environment and puts forward some countermeasures to improve rural logistics, which may contribute to the balanced development of rural economy.
Research on economic benefits of “source, storage and load” in a multi-energy complementary combined cooling-heating-electricity system
Authors: Xu Zheming , Hu Changbin , Lu Xiaojun
Published: May 2021

In order to solve the randomness and volatility of new energy power generation, promote the local consumption of renewable energy, and maximize the economic efficiency of CCHP system, this paper combines the schedulable resources of energy production, energy storage and energy consumption into a “source storage” system, which can meet the demand of power supply, heating and cooling at the same time. The objective function is to minimize the daily operation cost of the cold heat electric hybrid energy system, and the power balance and equipment capacity of the system are constrained. Using the established mathematical model of the system framework, the particle swarm optimization algorithm is used to improve the CCHP programming model to obtain the adaptation curve and the hourly output of the optimal operation of the equipment with the maximum economic benefit. The operation and maintenance costs of the two modes are analyzed in depth. The results show that the optimization of “source storage and load” system not only improves the reliability of energy supply, but also reduces the cost of operation and maintenance and improves the economic benefits of the system.
Economic analysis of two kinds of water heaters in service industry
Authors: Liu Chunhua , Zhao Yulei , Qu Zhuangzhuang
Published: May 2021

Taking a barber shop in Dezhou City of Shandong Province as an example, this paper calculates the required heat by using 300 liters of 40 °C hot water every day, introduces the working principle and system characteristics of electric water heater and solar water heater, selects the mainstream products in the market, and calculates the use cost. The comparison shows that the price of electric water heater is low, but the annual cost is high; the price of solar water heater is high, but the annual cost is low.
Module partitioning study of specialized engineering services based on modular theory ——case on coal production firms
Authors: Wang Xin , Luo Bo , Mao Qian Yu , Zhang Hui
Published: May 2021

Outsourcing of specialized engineering services has become one of the routes to the innovation and high-quality development of the commercial model of coal production enterprises in China. Currently, although there is practice, no scale-up development has been achieved.In this paper, based on modular theory, under the condition of unknown expert weights, triangular fuzzy number method is used to construct a service unit association relationship evaluation model, and the correlation matrix is calculated. Then, a genetic algorithm is used to cluster the association matrix and obtain the results of the division of the outsourced module of engineering services. Finally, the proposed method is validated using the coal mine development process of coal producers as an example.
Service assignment decision support of one-way carsharing in wireless charging road network
Authors: Liu Yixi
Published: May 2021

Once wireless charging lanes are commercialized, vehicles can be charged during the dispatch process, which is of great value to the electrification of one-way car-sharing fleet. In the city road network occupied with wireless charging lanes, service order arrangement of a car tends to select stations to make full use of the dispatch process for charging and improve the efficiency of vehicle circulation. The combination of wireless charging lanes and site charging provides a new perspective for service decision-making: scheduling from different alternative sites to sites lack of cars causes different power consumption or increase, charging costs, and travel time. Decision makers need to weigh these factors in order to get more profit, which puts forward new requirements for the service connection and dispatch of one-way shared cars.
The relationship between board size and firm performance
Authors: Yan Cao Chu , Hui Yang Zhi , Xin Liang
Published: May 2021

This paper selects 372 companies in the US S&P 500 from 2013 to 2017 as a sample, and uses empirical research methods to test the relationship between corporate board size and corporate performance. The results show that there is a negative correlation between the size of the board of directors and corporate performance; after dividing the sample into high-tech and non-high-tech industries, the results show that this negative correlation is more prominent in the high-tech field. After classifying the sample according to the parity of the number of directors, the results show that the odd number of directors is more effective than the even number of directors.
Evaluation of Influence Factors in Diesel Truck Pollution Control
Authors: Wang Qiang , Liu Haiying , Wang Jiaxin , Jiaoyu He Xin Liu
Published: May 2021

Diesel truck pollution emissions are major air polluting sources. Pollution control of diesel trucks is one of the important measures to improve air management. In order to study the influence factors in diesel trucks pollution control, an evaluation system consisting of one target layer, three criterion layers and 15 indicator layers was constructed. Through the comprehensive evaluation software Super Decision, the consistency test is passed, and the weight values of each indicator are obtained. Results show that the most important factor that affects the degree of diesel truck pollution is the number of law enforcement officers, with a weight of 0.24. The sum of weights of number of law enforcement officers, popularizing rate of environmental knowledge, blacklist rate, diesel trucks inspection rate, pollution control device configuration rate, correct use rate of pollution control devices, diesel truck emission standards is up to 0.84, which indicates that the seven influence factors determine diesel truck pollution control. The conclusions provide references in formulating measures to diesel truck.
Measurement and Correlation of Liquid-Liquid Equilibrium Data of Mesityl oxide-Diethoxymethane-Water System
Authors: Guo Hongyue , Han Mai , Zhao Yicong , Li Qingsong
Published: May 2021

To provide essential data for the separation of diethoxymethane and system water using mesityl oxide as the extractant, in this paper, the liquid-liquid equilibrium data of the ternary system of ‘mesityl oxide + diethoxymethane + water’ was measured at 303.2 K, 313.2 K and 323 K under normal pressure. The experimental results showed that partition coefficient and separation factor were both larger than 1, indicating that diethoxymethane and water could be well separated with mesityl oxide. The linear correlation coefficient of Bachman and Hand equation was larger than 0.99, indicating that our experimental data has good reliability. At the same time, the binary interaction parameters of the model were obtained by correlating the experimental data with the NRTL and UNIQUAC models. The relative root mean square error (RMSD) of the experimental value and the calculation formula was less than 0.79%, indicating that both the NRTL and UNIQUAC models can be well associated with experimental data.
Changes in county-scale landscape patterns in northern Fujian Province
Authors: Fan Xuncheng
Published: May 2021

Based on the five-phase Landsat TM/ETM remote sensing image data, the remote sensing images were processed and the landscape pattern indices were calculated with the help of ENVI and FRAGSTATS software, respectively. Jian’ou city, a large agricultural city in northern Fujian Province, was used as a county-scale study case to explore its landscape pattern changes during the 20-year period from 1995 to 2015. The results show that the development intensity of Jian’ou city increased continuously from 1995 to 2010, the fragmentation of the landscape increased, the degree of aggregation decreased significantly, and the landscape structure became increasingly complex. After 2010, the landscape connectivity gradually became better, the degree of aggregation increased, and the landscape structure tended to be simpler.
Numerical Simulation Research on Distribution Characteristics of Overlying Rock Stress Field in Floor Roadway
Authors: Wang Zhonghua
Published: May 2021

In order to explore the distribution characteristics of the overlying rock stress field in the floor roadway at different locations, FLAC3D software was used to simulate and analyze the surrounding rock directly above the floor roadway and the surrounding rock within 15m on both sides of the floor roadway when the distance between the floor roadway and the coal roadway and the horizontal distance were changed. The stress field distribution characteristics are obtained, and the stress field distribution characteristics of different areas directly above and on both sides of the floor roadway are obtained, which provides a theoretical basis for the location selection and support of the floor roadway.
Impacts of meteorological conditions on PM2.5 and PM10 pollution in Zhengzhou, China
Authors: Gao Rui , Wang Bairong , Huang Shunxiang
Published: May 2021

Meteorological conditions play an important role in aerosol pollution. In this study, the relationships between wind, temperature, relative humidity, and aerosol concentrations (PM2.5 and PM10) in Zhengzhou from January 2016 to December 2017 were analysed. Backward trajectory model was also used to investigate the relationship between meteorological parameters and regional transport of pollutants. Significant seasonal variations can be observed in the time series of pollutants and wind, temperature and relative humidity. The simulation of backward trajectories indicated that pollutants from southeast is critical to the air quality in Zhengzhou, in addition to local emissions of pollutants. To improve the air quality in Zhengzhou, joint efforts to reduce emissions in both Zhengzhou and its southeast adjacent regions should be considered.
Preliminary Life Cycle Analysis of Greenhouse Gas Emissions at Transportation Phase of a Beverage Drink for Green Logistics
Authors: Koiwanit Jarotwan , Riensuwarn Fonthong , Palungpaiboon Penpicha , Pornchaloempong Pimpen
Published: May 2021

As the transportation sector is one of the main emitters of large quantities of pollutions to the atmosphere, industries have been trying to cope with this issue and launch many campaigns or projects to reduce air pollutions. In any industries around the world, an electric vehicle is a part of alternative transportation mode which has recently experienced considerable growth. The paper aims to evaluate energy consumption and greenhouse gas (GHG) emissions of the food sector for the entire life cycle and particularly focusing on green road transportation. The focus of the analysis covers the mango powder drink mix transportation, distribution, and disposal aspects, especially for road transportation. The observed results showed that the electric vehicles have emissions reduction potential and consequently showed low impacts in Global Warming Potential (GWP) impact category. The environmental impact assessment identified that the primary source of energy use and GHG emissions was the transportation process from Hong Keaw plantation to King Mongkut’s Institute of Technology Ladkrabang (KMITL) (0.025 kgCO2eq).
Sustainable Transport Strategies: A Case Study of Riyad, Saudi Arabia
Authors: Al Zohbi Gaydaa
Published: May 2021

Transport is considered as an important action zone for achieving sustainable development since it takes a significant part in the economy sector with its existence among the production pattern, at geographic ladder [1]. Although, it is evident that the transport sector is responsible for many environmental issues. Riyad city is suffered from severe pollution caused by extensive use of motorized transport. Thus, implementation of appropriate policy tools relieve the harmful effect of transport activities by attaining sustainable transport. This paper pursues to evaluate the sustainability situation of transportation sector in Riyad city by using real data. The current paper ended with some recommendations to achieve sustainable transportation in KSA. Results indicated that the increase of car ownership and travel demand, the low use of public transport, and the rise of air and noise pollution level and the high level of road mortality lead to make the transportation system of Riyad unsustainable. On the other hand, the Saudi government have already started to execute many planned projects to achieve sustainable transportation such as the metro and bus network in Riyad and the installation of charger station of electric vehicle. In addition, the Saudi government set out many policies and target such as Target 11.2 that aims to achieve sustainable transportation in KSA and Target 3.6 that intents to minimize the high mortality rate from road accidents.