bluuebunny/crossref_metadata_2025 huggingface dataset:
The lexicon of antimicrobial peptides: a complete set of arginine and tryptophan sequences
Authors: Clark Sam , Jowitt Thomas A. , Harris Lynda K. , Knight Christopher G. , Dobson Curtis B.
Published: May 2021

Our understanding of the activity of cationic antimicrobial peptides (AMPs) has focused on well-characterized natural sequences, or limited sets of synthetic peptides designed de novo. We have undertaken a comprehensive investigation of the underlying primary structural features that give rise to the development of activity in AMPs. We consider a complete set of all possible peptides, up to 7 residues long, composed of positively charged arginine (R) and / or hydrophobic tryptophan (W), two features most commonly associated with activity. We found the shortest active peptides were 4 or 5 residues in length, and the overall landscapes of activity against gram-positive and gram-negative bacteria and a yeast were positively correlated. For all three organisms we found a single activity peak corresponding to sequences with around 40% R; the presence of adjacent W duplets and triplets also conferred greater activity. The mechanistic basis of these activities comprises a combination of lipid binding, particularly to negatively charged membranes, and additionally peptide aggregation, a mode of action previously uninvestigated for such peptides. The maximum specific antimicrobial activity appeared to occur in peptides of around 10 residues, suggesting ‘diminishing returns’ for developing larger peptides, when activity is considered per residue of peptide.
Understanding the perovskite/self-assembled selective contact interface for ultra-stable and highly efficient p–i–n perovskite solar cells
Authors: Aktas Ece , Phung Nga , Köbler Hans , González Dora A. , Méndez Maria , Kafedjiska Ivona , Turren-Cruz Silver-Hamill , Wenisch Robert , Lauermann Iver , Abate Antonio , Palomares Emilio
Published: May 2021

We have designed and synthesised two new carbazole based self-assembled molecules as hole-selective layers (HSLs) in p–i–n perovskite solar cells achieving high efficiency and high stability.
Spatial proteomics for understanding the tissue microenvironment
Authors: Mao Yiheng , Wang Xi , Huang Peiwu , Tian Ruijun
Published: May 2021

We outline the achievements and remaining challenges of mass spectrometry-based tissue spatial proteomics. Exciting technology developments along with important biomedical applications of spatial proteomics are highlighted.
Quantification and mapping of DNA modifications
Authors: Dai Yi , Yuan Bi-Feng , Feng Yu-Qi
Published: May 2021

Apart from the four canonical nucleobases, DNA molecules carry a number of natural modifications.
Creating porosity in a trianglimine macrocycle by heterochiral pairing
Authors: He Donglin , Clowes Rob , Little Marc A. , Liu Ming , Cooper Andrew I.
Published: May 2021

Macrocycles are usually barely porous in the solid-state because of their small intrinsic cavity sizes and tendency to close-pack. Here, a heterochiral pairing strategy to introduce porosity in a trianglimine macrocycle co-crystal.
Coordination polymers with embedded recognition sites: lessons from cyclotriveratrylene-type ligands
Authors: Snelgrove Matthew P. , Hardie Michaele J.
Published: May 2021

Coordination polymers with molecular recognition sites are assembled using cyclotriveratrylene ligands. Many show differential guest-spaces with host and lattice sites available, however common host–guest and self-inclusion motifs can block sites.
Glycerol-controlled synthesis of a series of cobalt acid composites and their catalytic decomposition toward several energetic materials
Authors: Wang Jingjing , Chen Suhang , Tang Qiufan , Li Jizhen , Xu Kangzhen
Published: May 2021

One of the challenges in solid propellant formulation is the ability to extend the combustion performance by efficiently catalyzing the decomposition of energetic additives.
Rational design and crystal structure prediction of ring-fused double-PDI compounds as n-channel organic semiconductors: a DFT study
Authors: Debata Suryakanti , Sahoo Smruti R. , Khatua Rudranarayan , Sahu Sridhar
Published: May 2021

In this study, we present an effective molecular design strategy to develop the n-type charge transport characteristics in organic semiconductors, using ring-fused double perylene diimides (DPDIs) as the model compounds.
Infrared photodissociation spectroscopy of heteronuclear group 15 metal–iron carbonyl cluster anions AmFe(CO)n− (A = Sb, Bi; m, n = 2, 3)
Authors: Meng Luyan , Liu Siying , Qin Qifeng , Zeng Bin , Luo Zhen , Chi Chaoxian
Published: May 2021

Heteronuclear group 15 metal–iron carbonyl cluster complexes of AmFe(CO)n− (A = Sb, Bi; m, n = 2–3) were generated in the gas phase and studied by IRPD spectroscopy and DFT calculations.
Dissociations of free radicals to generate protons, electrophiles or nucleophiles: role in DNA strand breaks
Authors: Walton John C.
Published: May 2021

The concept behind the research described in this article was that of marrying the ‘soft’ methods of radical generation with the effectiveness and flexibility of nucleophile/electrophile synthetic procedures.
Correction: Yulangsan polysaccharide improves redox homeostasis and immune impairment in d-galactose-induced mimetic aging
Authors: Doan Van Minh , Chen Chunxia , Lin Xing , Nguyen Van Phuc , Nong Zhihuan , Li Weisi , Chen Qingquan , Ming Jianjun , Xie Qiuqiao , Huang Renbin
Published: May 2021

Correction for ‘Yulangsan polysaccharide improves redox homeostasis and immune impairment in d-galactose-induced mimetic aging’ by Van Minh Doan et al., Food Funct., 2015, 6, 1712–1718, DOI: 10.1039/C5FO00238A.
Self-assembly, interfacial properties, interactions with macromolecules and molecular modelling and simulation of microbial bio-based amphiphiles (biosurfactants). A tutorial review
Authors: Baccile Niki , Seyrig Chloé , Poirier Alexandre , Alonso-de Castro Silvia , Roelants Sophie L. K. W. , Abel Stéphane
Published: May 2021

Amphiphiles obtained by microbial fermentation, known as biosurfactants or bioamphiphiles, are reviewed in terms of their solution experimental and theoretical self-assembly properties, interface properties and interactions with macromolecules.
Controlled release of herbicides by 2,4-D-, MCPA-, and bromoxynil-intercalated hydrotalcite nanosheets
Authors: Gao Yunhao , Zhou Zhiyuan , Chen Xi , Tian Yuyang , Li Yan , Wang Huachen , Li Xuan , Yu Xueyang , Cao Yongsong
Published: May 2021

Herbicide-intercalated Zn–Al hydrotalcites were facilely fabricated by a simple, rapid, and sustainable process and could reduce the volatilization and leaching risks simultaneously without affecting herbicidal activity.
Inverse-designed semiconductor nanocatalysts for targeted CO2 reduction in water
Authors: Califano Marco , Zhou Yang
Published: May 2021

Our state-of-the-art atomistic semi-empirical pseudopotential modelling reveals CdTe/CdSe tetrapods as ideal catalysts for CO2 reduction to CH4, exhibiting potential for unprecedented selectivity and for unparalleled efficiency.
Recent progress in the nitration of arenes and alkenes
Authors: Qian Yu-En , Zheng Lan , Xiang Hao-Yue , Yang Hua
Published: May 2021

This mini review summarizes the recent advances in the regiospecific nitrations of arenes and alkenes based on the structural features of substrates.
Synthesis of 13C/19F/2H labeled indoles for use as tryptophan precursors for protein NMR spectroscopy
Authors: Maleckis Ansis , Herath Iresha D. , Otting Gottfried
Published: May 2021

Cell-free protein synthesis using 19F–13C and 1H–13C spin pair containing indoles as tryptophan precursors enables site-specific labeling of proteins for 19F NMR and TROSY NMR studies.
Recent developments in decarboxylative C(aryl)–X bond formation from (hetero)aryl carboxylic acids
Authors: Sharma Ruchi , Yadav M. Ramu
Published: May 2021

This review highlights the recent developments in ipso-decarboxylative C–X (X = O/N/halo/S/Se/P/CN) bond formation using (hetero)aryl carboxylic acids, which are economical and environmentally benign starting materials.
Highly selective C3–H iodination of pyrrolo[1,2-a]quinoxalines
Authors: Liu Yali , Wei Yu , Yang Zhen , Li Yang , Liu Yan , Liu Ping
Published: May 2021

A series of novel 3-iodopyrrolo[1,2-a]quinoxaline derivatives were obtained with excellent regioselectivity and broad substrate scope via C3–H direct iodination of pyrrolo[1,2-a]quinoxalines.
Correction: Click activated protodrugs against cancer increase the therapeutic potential of chemotherapy through local capture and activation
Authors: Wu Kui , Yee Nathan A. , Srinivasan Sangeetha , Mahmoodi Amir , Zakharian Michael , Mejia Oneto Jose M. , Royzen Maksim
Published: May 2021

Correction for ‘Click activated protodrugs against cancer increase the therapeutic potential of chemotherapy through local capture and activation’ by Kui Wu et al., Chem. Sci., 2021, 12, 1259–1271, DOI: 10.1039/D0SC06099B.
Correction: Multifunctional sulfur-mediated strategy enabling fast-charging Sb2S3 micro-package anode for lithium-ion storage
Authors: Wang Shaohua , Cheng Yong , Xue Hongjin , Liu Wanqiang , Yi Zheng , Chang Limin , Wang Limin
Published: May 2021

Correction for ‘Multifunctional sulfur-mediated strategy enabling fast-charging Sb2S3 micro-package anode for lithium-ion storage’ by Shaohua Wang et al., J. Mater. Chem. A, 2021, 9, 7838–7847, DOI: 10.1039/D0TA11954G.
Identification of potential diagnostic and prognostic biomarkers for LUAD based on TCGA and GEO databases
Authors: Zheng Qiangqiang , Min Shihui , Zhou Qinghua
Published: May 2021

Accumulating evidence has demonstrated that gene alterations play a crucial role in LUAD development, progression, and prognosis. The present study aimed to identify the hub genes associated with LUAD. In the present study, we used TCGA database to screen the hub genes. Then, we validated the results by GEO datasets. Finally, we used cBioPortal, UALCAN, qRT-PCR, HPA database, TCGA database, and Kaplan–Meier plotter database to estimate the gene mutation, gene transcription, protein expression, clinical features of hub genes in patients with LUAD. A total of 5930 DEGs were screened out in TCGA database. Enrichment analysis revealed that DEGs were involved in the transcriptional misregulation in cancer, viral carcinogenesis, cAMP signaling pathway, calcium signaling pathway, and ECM–receptor interaction. The combining results of MCODE and CytoHubba showed that ADCY8, ADRB2, CALCA, GCG, GNGT1, and NPSR1 were hub genes. Then, we verified the above results by GSE118370, GSE136043, and GSE140797 datasets. Compared with normal lung tissues, the expression levels of ADCY8 and ADRB2 were lower in LUAD tissues, but the expression levels of CALCA, GCG, GNGT1, and NPSR1 were higher. In the prognosis analyses, the low expression of ADCY8 and ADRB2 and the high expression of CALCA, GCG, GNGT1, and NPSR1 were correlated with poor OS and poor PFS. The significant differences in the relationship of the expression of 6 hub genes and clinical features were observed. In conclusion, 6 hub genes will not only contribute to elucidating the pathogenesis of LUAD and may be potential therapeutic targets for LUAD.
RAGE-mediated functional DNA methylated modification contributes to cigarette smoke-induced airway inflammation in mice
Authors: Li Ping , Wang Tao , Chen Mei , Chen Jun , Shen Yongchun , Chen Lei
Published: May 2021

Our previous study indicated knockout of receptor for advanced glycation end-products (RAGE) significantly attenuated cigarette smoke (CS)-induced airway inflammation in mice. In the present study, we aim to further detect the mediatory effects of RAGE in DNA methylated modification in CS-induced airway inflammation. Lung tissues from the CS-exposed mouse model of airway inflammation were collected for profiling of DNA methylation by liquid hybridization capture-based bisulfite sequencing, which were used for conjoint analysis with our previous data of gene expression by cDNA microarray to identify functional methylated genes, as well as hub genes selected by protein–protein interaction (PPI) network analysis, and functional enrichment analyses were then performed. After RAGE knockout, 90 genes were identified by intersection of the differentially methylated genes and differentially expressed genes. According to the reversed effects of methylation in promoters on gene transcription, 14 genes with functional methylated modification were further identified, among which chemokine (C–X–C motif) ligand 1 (CXCL1), Toll-like receptor 6 (TLR6) and oncostatin M (OSM) with hypomethylation in promoters, were selected as the hub genes by PPI network analysis. Moreover, functional enrichment analyses showed the 14 functional methylated genes, including the 3 hub genes, were mainly enriched in immune-inflammatory responses, especially mitogen-activated protein kinase, tumor necrosis factor, TLRs, interleukin (IL)-6 and IL-17 pathways. The present study suggests that RAGE mediates functional DNA methylated modification in a cluster of 14 targeted genes, particularly hypomethylation in promoters of CXCL1, TLR6 and OSM, which might significantly contribute to CS-induced airway inflammation via a network of signaling pathways.
The Impact of Racism, Power, Privilege, and Positionality on Communication Sciences and Disorders Research: Time to Reconceptualize and Seek a Pathway to Equity
Authors: Ellis Charles , Jacobs Molly , Kendall Diane
Published: May 2021

Purpose

The purpose of this article is to explore how racism, privilege, power, and positionality negatively impact clinical research conducted in the discipline of communication sciences and disorders.

Conclusions

Evidence suggests solutions will not emerge from a minor revision or adjustment of current research approaches. Instead, to make deep and necessary changes, a complete restructuring of the research process is needed. This restructuring calls for a reconceptualization of how research questions and hypotheses are formed, how methods are selected, how data are analyzed and interpreted, and who is at the table throughout this process of knowledge generation. Such an overhaul of current research approaches will offer the field a solution-oriented roadmap for scientific investigation that facilitates greater equity in the research enterprise that translates into improved clinical outcomes for all clients served.
Driving and tilt‐hovering – An agile and manoeuvrable aerial vehicle with tiltable rotors
Authors: Li Binbin , Ma Lei , Wang Duo , Sun Yongkui
Published: May 2021

Driving and tilt‐hovering help unmanned aerial vehicles extend their time of operation and the visible range of the equipped sensors. Standard quadrotors are underactuated, whose translational and rotational motions are strongly coupled. As a result, it is impossible to maintain the attitude invariably while changing position. Meanwhile, larger flying speed results in greater air resistance, which is also not desirable. A novel aerial platform with tiltable rotors is proposed. Compared with standard quadrotors, the aerial vehicle has three special capabilities: vector‐flying, tilt‐hovering, and driving. The platform consists of two tilting‐axes to change the direction of thrusts with respect to the aircraft body. To guarantee flexible manoeuvres, a geometric tracking control scheme that adapts on the fly to the thrust vectoring is exploited. Manoeuvrability of the proposed vehicle in different manoeuvres is demonstrated, such as flight with vectoring thrust that can reduce the flight resistance, tilt‐hovering expanding the reachable set of the equipped sensors. The prototype equipped with an electromechanical controller is constructed, and several associated preliminary experiments are performed. The feasibility of the mechanical design and the geometric control strategy are demonstrated.
Quantum and classical oblivious transfer: A comparative analysis
Authors: Santos Manuel B. , Pinto Armando N. , Mateus Paulo
Published: May 2021

Secure multiparty computation has the potential to be a disruptive technique in the realm of data analysis and computation. It enables several parties to compute virtually any function while preserving the privacy of their inputs. However, most of its protocols’ security and efficiency relies on the security and efficiency of oblivious transfer (OT). In this work, we make a detailed comparison between the complexity of the hybrid quantum oblivious transfer (HQOT) protocol presented in [11] and the classical OT [12], which to the best of our knowledge, is the fastest OT protocol. We also propose an optimised version of HQOT and discuss several other OT protocols generated from oblivious keys.
Detection of volatiles undergoing sublimation from 67P/Churyumov-Gerasimenko coma particles using ROSINA/COPS
Authors: Pestoni B. , Altwegg K. , Balsiger H. , Hänni N. , Rubin M. , Schroeder I. , Schuhmann M. , Wampfler S.
Published: May 2021

Context. In an earlier study, we reported that the ram gauge of the COmet Pressure Sensor (COPS), one of the three instruments of the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA), could be used to obtain information about the sublimating content of icy particles, made up of volatiles and conceivably refractories coming from comet 67P/Churyumov-Gerasimenko.

Aims. In this work, we extend the investigation to the second COPS gauge, the nude gauge. In particular, we analyse the volume of the volatile content of coma particles, along with a search for possible dependencies between the nude gauge detection rate (i.e. the rate at which icy particles are detected by the nude gauge) and the position of the Rosetta spacecraft. We also investigate the correlations of the nude gauge detection rate with the quantities associated with cometary activity.

Methods. We inspected the density measurements made by the nude gauge for features attributable to the presence of icy particles inside the instrument. These data were then analysed statistically based on the amplitude of the feature and on the position of the spacecraft at the time of detection.

Results. Although it was not originally designed for such a purpose, the COPS nude gauge has been able to detect ~67 000 features generated by the sublimation of the volatile content of icy particles. The nude gauge detection rate follows a trend that is inversely proportional to the heliocentric distance. This result is interpreted as a confirmation of a possible relation between the nude gauge detection rate and cometary activity. Thus, we compared the former with parameters related to cometary activity and obtained significant correlations, indicating that the frequency of icy particle detection is driven by cometary activity. Furthermore, by representing the volatile part of the icy particles as equivalent spheres with a density of 1 g cm−3, we obtained a range of diameters between 60 and 793 nm, with the smaller ones (<390 nm in diameter) having a size distribution power index of −4.79 ± 0.26.
Galactic cosmic ray modulation at Mars and beyond measured with EDACs on Mars Express and Rosetta
Authors: Knutsen E. W. , Witasse O. , Sanchez-Cano B. , Lester M. , Wimmer-Schweingruber R. F. , Denis M. , Godfrey J. , Johnstone A.
Published: May 2021

Galactic cosmic rays (GCRs) are an intrinsic part of the heliospheric radiation environment and an inevitable challenge to long-term space exploration. Here we show solar-cycle-induced GCR modulation at Mars in the period 2005–2020, along with GCR radial gradients, by comparing Mars Express and Rosetta engineering parameters to sunspot number time series. The engineering parameters used are the error detection and correction (EDAC) counters, cumulative counters that are triggered by charged energetic particles that cause memory errors in onboard computers. EDAC data provide a new way of gaining insight into the field of particle transport in the heliosphere; these data also allow us to complement dedicated radiation instrumentation as EDAC software is present on all spacecraft. This dataset was used to capture variations in GCRs in both space and time, yielding the same qualitative information as ground-based neutron monitors. Our analysis of the Mars Express EDAC parameter reveals a strong solar cycle GCR modulation, with a time lag of ∼5.5 months. By combining Mars Express with Rosetta data, we calculate a 4.7 ± 0.8% increase in EDAC count rates per astronomical unit, which we attribute to a radial gradient in GCR fluxes in accordance with established literature. The potential of engineering data for scientific purposes remains mostly unexplored. The results obtained from this work demonstrate, for the first time for heliophysics purposes, the usefulness of the EDAC engineering parameter, the usefulness of data mining, and the utility of keeping missions operational for many years, all of which provide complimentary data to nominal science instruments.
Research on evaluation method of energy supply reliability of regional energy Internet
Authors: Li Pengli , Su Jian , Yan Tao , Liu Jiqiu , Qi Xiaoguang
Published: May 2021

This paper studies the reliability evaluation technology of regional energy Internet and represents a reliability evaluation method considering the optimal load reduction strategy. The application scenario of regional Energy Internet with power system as the core is built. The specific form is that multiple Integrated Energy systems are connected to the superior distribution network through the tie line. The reliability evaluation index system of power system and regional energy Internet is introduced. Based on the modelling of components in the regional energy Internet application scenario in this paper, the operation model and two-state Markov model are mainly established for the renewable energy power generation devices, energy coupling devices and energy storage devices in IES. The optimal load reduction models based on load classification are established for the faults of distribution network lines and the faults of IES internal components connected to the distribution network in regional energy Internet respectively. Through the construction of different application scenarios, the load reduction situation under different faults and different component parameters is analysed, and the corresponding reliability index calculation and result analysis are carried out.
Distribution Line Equipment and Defect Identification Based on Deep Learning
Authors: Chen Gege
Published: May 2021

In this study, UAVs were used to collect data of distribution line resources, and defects in distribution line equipment and construction process were identified through deep learning. Different algorithms are used to identify the defects of distribution line equipment and construction process. The research will ultimately support regional synchronization and online development for intelligent automatic acceptance of the distribution wire UAV.
A coordinated control strategy based on Photovoltaic-hybrid energy storage system
Authors: Wang Xiaobin , Zou Hairong
Published: May 2021

Photovoltaic power generation is changing day by day, but its system has drawbacks. To compensate for the shortcomings of PV power generation system, the micro-grid system of PV power generation with HES is constructed by using the complementary characteristics of battery and supercapacitor. On the basis of this, we introduce a fuzzy control to realize the fast response of hybrid energy system. A micro-grid model is built based on Matlab/Simulink to verify the feasibility and rationality of the proposed control strategy.
Research on the Difference Mechanism of High Voltage Circuit Breaker’s Opening/Closing Coil Current
Authors: Su Yi , Lu Yufeng , Zhang Lei , Rao Xiajin
Published: May 2021

High voltage circuit breakers are important protection and control equipment for the power grid. The defects and faults of the circuit breaker seriously affect the safety and stability of the power system. As the key component of the operating mechanism of the circuit breaker, the opening/closing coils contain a large amount of information about the operating status of the mechanism. In order to investigate the cause of the difference in the current waveforms, this paper analyzes the factors affecting the circuit breaker opening/closing coil current based on the actual high voltage circuit breaker, and distinguishes the characteristics of the current caused by the environmental difference and Structural difference. At the same time, the characteristics of coil current changes under four different types of mechanism defects are analyzed. These results lay the foundation for status evaluation of high voltage circuit breakers based on opening/closing coil current.
Development of Inplantable Surface Acoustic Wave Sensor for High Voltage Cable Core Temperature Monitoring in Intermediate Joint
Authors: Pang Dan , Wang Xiaoyan , Zhao Changpeng , Wang Chaobin
Published: May 2021

In this paper, a kind of implantble passive wireless surface acoustic wave (SAW) sensor and its reader are developed to measure the operation temperature of high voltage crossed-linked cable core. A small type SAW temperature sensor is embedded into cable intermediate joint. A radio frequecny transceiver of the reader based on discrete devices is optimally designed to achieve high signal-to-noise ratio and receiving sensitivity. The characteristic of resonant frequency and temperature of SAW sensor is determined by frequency scan method. Through AC withstand voltage and temperature rise test of 110kV cable, it proves that the prototype can accurately measure the operation temperature of 110kV cable core in intermediate joint under high operation temperature and strong electromagnetic environment.
Circulating Current Suppression Strategy of Modular Multilevel Converter Based on Model Predictive Control
Authors: Liu kang , Gao Guige
Published: May 2021

Modular Multilevel Converter (MMC) has the characteristics of high voltage level and low switching frequency. The traditional modular multilevel converter circulating current control strategy mostly adopts the PI control principle, and the parameter setting is complicated and the accuracy is not high, and the control process is more difficult. Model predictive control strategy is the optimal control method based on the model in the existing time domain. This paper proposes a Model Predictive Control (MPC) method based on carrier phase-shifted pulse width modulation (PSC-PWM) to suppress the circulating current, and output the optimal modulation wave through model prediction. Compared with the traditional control strategy, this strategy is simple to implement, does not require complex tuning calculations, and combines with the traditional capacitor voltage equalization strategy to obtain the output modulation wave. A 7-level MMC simulation control system is built in MATLAB / SIMLINK to verify the theory, comparing with existing control methods, it can be concluded that the proposed method has high calculation efficiency, good control accuracy and strong robustness.
Key Technologies of Multi-Source Data Integration System for Large Power Grid Operation
Authors: Shao Guanghui , Wang Bing , Liu Yang , Jia Yupei , An Tianyu , Yu Zhihong , Yue Han
Published: May 2021

With the continuous expansion of the scale of the power grid and the continuous increase in the proportion of new energy and power electronic equipment, higher requirements are placed on the basic data of the online security analysis of the power grid. This paper proposes a multi-source data integration system for large power grid operation. It studies the rapid interaction and intelligent integration of multi-source heterogeneous information such as offline and online models, breaking the technical application barriers of various types of data, and quickly generating real-time power grid model. The analysis model provides a reliable data basis for the online analysis of the power grid. Finally, based on the PSASP simulation software, the correctness and effectiveness of the multi-source data integration system of large power grid are verified.
Study on Application of Solar Energy in Highway
Authors: Xu Jianfu , Liu Zhiqiang , Jiang Haifeng
Published: May 2021

In recent years, the construction of large-scale electromechanical facilities and smart roads in the highway network has not only improved the level of operation safety but also generated a huge demand for electric energy, the highway transportation industry has become one of the key energy consumption industries second only to industry and construction. Solar energy has become a kind of green energy that has attracted more and more attention among various new energy sources due to its energy-saving, clean, zero-emission, wide-ranging and safe characteristics. This paper analyzes the distribution of solar photovoltaic resources in China’s highway network; puts forward the solar energy three-dimensional clean energy supply network technology which is suitable for highway scene, fully relying on and optimize the use of road network linear areas such as road surface space, three-dimensional space along the road to develop solar photovoltaic resources. Solar-powered roads, solar photovoltaic slopes, photovoltaic sound barriers, photovoltaic isolation barriers, etc. can be developed along the line, so as to build a three-dimensional road solar clean energy network that combines “points, lines and sections”, so that green and clean energy can be provided to a large number of electricity facilities and equipment along the highway, as well as to surrounding cities and villages, making the highway become the transport network carrying the flow of people and logistics, vehicle-road cooperative intelligent information network and clean energy supply network.
Research and Development of a New Environmental-friendly Temperature-fixing Circuit Fuse with the Fire Extinguishing Function
Authors: Liu Sijia
Published: May 2021

This paper made statistics on the proportion of electrical fires in total fire disasters in China, analyzed the causes of electrical fires as well as the current protective measures and their advantages and disadvantages, and introduced the composition, working principle, verification results of main technical parametersand application prospects of the new environmental-friendly temperature-fixing circuit fuse with the fire extinguishing function.
Application of New Energy Logistics Vehicle Based on Urban Distribution
Authors: Li Long Ying , Chen Jie , Sun Yan Ping , Fan Zhi Ying , Ren Yu Xin , Yan Rui Wen
Published: May 2021

With the development of the Internet era, urban logistics distribution increases. At the same time, the state vigorously promotes the development of the new energy automobile industry and the continuous strengthening of people’s awareness of environmental protection, new energy vehicles began to be favored by logistics enterprises. From the analysis of the national support policy for new energy vehicles, the development of new energy vehicles in recent years and the TCO calculation of their cost advantages, this paper clarifies that new energy vehicles will occupy the mainstream position in urban logistics distribution.
H∞ fault estimation of robot joint in finite frequency domain
Authors: Pan Yuedou , Xiong Zhanbo
Published: May 2021

The fault estimation of robot joint is of great significance to improve the reliability and stability of robot joint. Based on the design of fault diagnosis observer and the finite frequency theory, a method of H infinite fault estimation with frequency domain is proposed. The design method combines H infinite filter wave with finite frequency technology effectively, and has strong anti-interference performance, Compared with other design methods, the method proposed in this paper can improve the accuracy of fault estimation
Welding procedure research of titanium heat exchangers
Authors: Jiang Chengjuni , Wang Wei , Li Qian , Zhang Xiaoli
Published: May 2021

In order to manufacture Gr.1 titanium heat exchangers, the welding property and weld structure of titanium tube-to-tubesheet are analyzed. The procedure of Pulse GTAW is used and the visual inspection, dimensional inspection, chemical composition, mechanical properties and metallographic structures are tested and analyzed. The results show that the weld joint can get ideal structure and good chemical composition, mechanical properties and corrosion resistance. The successful welding qualification has accumulated valuable experience for manufacture of titanium heat exchangers.
Effect of Fe2+ on the performance of Anammox at low temperature
Authors: Wang Bing , Sun Bing , Liu Yunlong , Yang Lin
Published: May 2021

The effects of the addition of a certain concentration of Fe2+ on the activity of anammox bacteria in the system at neutral low temperature were investigated by detecting the contents of nitrate, conductance values and protein in the system. The results showed that when the temperature was set at 15°C and the concentration of Fe2+ was 0.16 mmol/L, the system operated in the best condition. After 60h, the denitration rate increased by 40%, the electrical conductivity value decreased the fastest, and the protein content increased by 24.5 mg/g compared with the control group. Zero valent iron has been widely concerned as a reducing agent for the treatment of nitrate wastewater, but the treatment efficacy is severely affected by temperature. The addition of anammox bacteria coupled with Fe0 can not only mutually promote the reaction activity to adapt to more non ideal environments but also reduce the secondary pollution, which provides a new idea for the practical application of nitrate wastewater treatment.
Long-Term Effects of Trace NO2Addition on the Performance of CANON SBR
Authors: Qing Cai , Jiajia Ding
Published: May 2021

Two parallel CANON Sequencing Bach reactors were started, and 67ppm NO2was added into Sequencing Bach Reactor 2 while nothing was added to Sequencing Bach Reactor 1. The total nitrogen removal efficiency of SBR1 was 65.5±5.0% at a removal rate of 0.198±0.023 kgN/m3/d. Meanwhile, the SBR2 with NO2addition showed a removal efficiency of 67.5±6.2%, with a removal rate of 0.277±0.017 kgN/m3/d. The SBR2 had a higher removal efficiency and rate than the SBR1. The continuous addition of trace NO2into the CANON Sequencing Bach Reactor allows conventional aerobic ammonia oxidation with O2as the electron acceptor and ammonia oxidation of with NO2as the electron acceptor to take place simultaneously, thus improving the ammonia oxidation rate and autotrophic nitrogen removal performance.China Library Classification No.: X703.1 Literature Label: A Article No.:
Synthesis and photophysical properties of fluorine substituted end group for benzo[1, 2-b:4, 5-b’] diselenophene-based small molecule acceptor
Authors: Liu Yan-Qiang , Wang Jin-Liang
Published: May 2021

A-D-A types non-fullerene small molecule acceptors (NF-SMAs) have achieved excellent progress in recent years, while the development of series of new materials. Herein, a new NF-SMA, namedBDSe-4F, based on linear benzo[1, 2-b:4, 5-b’] diselenophene with the difluorinated 5, 6-difluoro-3(dicyanomethylene) indanone (IC-2F) was synthesized and investigated. Due to the introduction ofIC-2F, the intramolecular charge transfer is enhanced. Furtherly, theBDSe-4Fexhibits a wider absorption from 600-800 nm in solution. From solution to film, the absorption spectrum shows an obvious red-shifted in the range of 800-900 nm and the maximum absorption peak red-shifted at 31 nm, suggesting that much stronger intermolecular interactions caused by non-covalent bond of F....S,F.... Se, and S....O. TheBDSe-4Fpossesses good spectral absorption range and excellent molecular stacking, which beneficial to achieve highJSC and electron mobility. These results illustrate that the synergistic strategy of using benzo[1, 2-b:4, 5-b’] diselenophene core unit andIC-2Fend group is a promising strategy to enhance performance in organic solar cells.
Effect of water temperature and microcystins on the pharmacokinetics of epigallocatechin gallate (EGCG) in snakehead fish (Ophiocephalus argus Cantor)
Authors: Dong Xiao-Chen , Ye Lu-Ting , Zhao Jin , Wan Wang-Jun , Deng Tong-Le , Ge Jian
Published: May 2021

The study was conducted to evaluate the effect of water temperatures and intraperitoneal administration of microcystins (MCs) on the pharmacokinetics characteristics of epigallocatechin gallate (EGCG) in snakehead fish (Ophiocephalus argus Cantor) by RP-HPLC method. The results showed that EGCG was absorbed and eliminated more faster at 20ºC than at 10ºC. Then the detected results also showed that EGCG was significantly absorbed fast in MCs-treated group than in control group. However, EGCG elimination became very lowly in MCs-treated group. Therefore, the pharmacokinetic characteristics of EGCG were significantly affected by water temperature and MCs toxin.
Ce/Mo metal oxides synthesized with DBD plasma as efficient photocatalysts: Effect of Ce/Mo molar ratios
Authors: Zheng Kangkang , Tao Xumei
Published: May 2021

Ce/Mo metal oxides with different Ce/Mo molar ratios were synthesized via dielectric barrier discharge (DBD) method for the first time and applied as efficient photocatalysts. The morphology and physicochemical properties of the synthesized samples were characterized by XRD, SEM, BET and XPS. Ce/Mo metal oxides synthesized with Ce(NO3)3·6H2O and (NH4)6Mo7O24·4H2O molar ratio of 4:1 exhibited more surface chemical adsorption of oxygen, which were beneficial to the photocatalytic performance. The degradation rate of 1000 mL (50 mg/L) methyl orange could reach 80% within 18 min under UV-light radiation. Ce/Mo metal oxides exhibited excellent photocatalytic performance and had potential application prospect in dye wastewater treatment.
Research progress on the removal of phthalic acid esters in water
Authors: Zhang Sheng , Zhang Wei , Lin Li
Published: May 2021

Phthalic acid esters (PAEs), as a kind of persistent organic pollutants, are classified as environmental hormones, and their estrogenic effects can cause great harm to the reproductive system and nervous system of the organism. The environmental pollution and toxicological effects caused by this substance have received global attention, so how to effectively remove PAEs in the environment has become a current research hotspot. This paper summarizes and reviews the common removal methods of phthalates in water, including physical methods, biological methods and chemical methods, and finally prospects for future development.
Research on Cable Insulation Aging Under Acid-base Environment
Authors: Guo Jin Ming , Wang Fei Feng
Published: May 2021

In order to further study the effect of different degree of acidity and alkalinity on cable insulation aging, the aging condition of cable insulation was compared and analyzed under different pH values. The samples of cable insulation material slice and short cable were carried out the accelerated aging test, which were placed in the conditions of different pH values. And then the test results of micro morphology and electrical properties between the different samples were compared and analyzed after aging. According to the test results in this paper, the micro morphology of the cable insulation material slice would change differently under the aging conditions of different acidity and alkalinity, which indicated that the degree of oxidation degradation of insulation material aging was different from the different acidity and alkalinity conditions. In addition, both acid or alkaline environment would accelerate the aging of cable insulation and reduce the service life of cable, while strong acid and strong alkaline environment are more conducive to the formation of interpenetrating water tree in cable insulation material and cause the operation accident of power cable. Furthermore, the test results of electrical properties of short cable samples after aging showed that the aging degree of short cable samples was more serious in alkaline environment, and the decline of electrical properties was faster.
Nitrogen application save phosphorus deficiency in maize inbred line QXH0121
Authors: Leng Bingying , Zhang Hanhan , Li Ming , Mu Chunhua , Zhang Enying , Liu Xia
Published: May 2021

Nitrogen and phosphorus dual stress significantly inhibited the maize growth and decreased the accumulation of nitrogen and phosphorus in plants. The co-application of nitrogen and phosphorus most significantly increased the biomass compared to the dual deficiency stress, and to our surprise, the repair effect of nitrogen application alone was basically similar to the repair effect of simultaneous application of nitrogen and phosphorus reflected in biomass as well as nitrogen and phosphorus content. Transcriptomic analysis showed that DEGs related to phosphorus transporters in N versus NP group and N versus P group were all up-regulated. These all confirm that the nitrogen application alone mitigated damages caused by low nitrogen and phosphorus dual stress comparable to that of nitrogen and phosphorus co-application. These indicate that the presence of nitrogen is conducive to the accumulation and transportation of phosphorus.
Research on Virtual Test of Automobile Automatic Emergency Braking System on Ice-Snow Road
Authors: Zhu Xianchao , Chang Sheng , Li Bingtao , Lu Hualei
Published: May 2021

In view of the severe weather conditions in cold regions, the basic characteristics and braking distance of ice snow covered pavement are analyzed. This paper uses the PreScan/CarSim/Simulink software co-simulation method to test the automatic emergency braking (AEB) system on ice-snow roads. Through the appropriate adjustment of the time to collision (TTC) threshold, the car makes automatic emergency braking on the road with low friction coefficient system can achieve the effect of collision avoidance and injury reduction.
Metallogenic characteristics and genesis of granite type uranium ore bodies in South China
Authors: Liu Zekun
Published: May 2021

South China is the key producing area of granite-type uranium deposits in China. After decades of exploration, many important progress has been made in the study of metallogenic regularity of granite type uranium deposits in this area. On the basis of previous studies, this paper attempts to sort out the geological conditions and characteristics of diagenesis and mineralization of granite type uranium deposits in South China, and discuss their metallogenic models, so as to better summarize the metallogenic regularity and serve the prospecting and prediction.
Synergistic scale inhibition of both IA/AMPS copolymer and magnetic field
Authors: Liu Zhan , Yan Meifang , Li Na , Gao Yuhu , Li Haihua , Liu Zhenfa
Published: May 2021

The antiscaling rate of both water magnetic device and IA/AMPS copolymer was investigated by using a stationary scale inhibition experimental device, and the result illustrated that there was a synergistic scale inhibition effect between magnetic field and IA/AMPS copolymer. Under the condition the experimental water through the water magnetizer was 120L / h, and the magnetic field strength was 0.7T, the magnetization time of 40 min, the antiscaling rate of both water magnetic device and copolymer IA/AMPS to CaCO3 increased 11% as compared with that of the copolymer IA/AMPS alone. At this time, the dosage of copolymer IA/AMPS was 6mg/L. And the synergistic antiscaling rate of both water magnetic device and IA/AMPS copolymer to Ca3(PO4)2 increased 25% as compared with that of the copolymer IA/AMPS alone under the same condition except dosage of IA/AMPS copolymer was 20 mg/L.
Research progress of polydiacetylene sensing materials in food biotechnology
Authors: Wang Hui , Han Li , Gong Weijuan , Chu Ranran
Published: May 2021

Polydiacetylene (PDAs) is a special semiconductor polymer with an alternating conjugated structure of ene-acetylene and unique optical and electronic properties. Typically, PDAs change from blue to red in response to the external stimuli, such as temperature, pH, ions, organic solvents, pressure, and donor-acceptor interactions. This colorimetric response of PDAs makes them one of the excellent materials for chemical or biosensor analysis platforms. In this review, we briefly describe the research progress of polydiacetylene systems in the field of food biotechnology. The challenges and outlooks of PDAs sensing materials in visual detection of preservatives in food innovatively were also discussed.
Jinan City Land Without Water Port Construction Model
Authors: Zhang Shuyin , Guo Ruiqi , Wu Yuxuan , Wang Kunmin , Han Yudong , Zhang Xiaobai
Published: May 2021

With the global economic integration and the continuous development of the logistics industry, multi-directional transport in the international position is becoming more and more important, the port is the carrier of the development of multi-vehicle transport. The competition of various countries is no longer the competition of the previous infrastructure and operational capacity, and the construction of a waterless port in the inland will become an effective measure for the sustainable development of Jinan. Taking the development of multi-mode transportation in Jinan as the background, this paper analyzes the strategic environment for the development of inland waterless port in Jinan city and the construction mode of inland waterless port in Jinan city by introducing the multi-mode transportation in Jinan area.
Pore distribution and classification of loess
Authors: Liu Qianqian , Wang Tiehang
Published: May 2021

The micro-pore characteristics in undisturbed loess have a profound influence on the permeability characteristics. Based on the results of permeability test, it is proved that the permeability coefficient of soil samples with the same porosity ratio is different and the internal characteristics are diversified. The internal pores of undisturbed loess were studied by scanning electron microscopy (SEM). The results show that there are obvious differences in the internal microstructure of the original loess with the same porosity ratio. There are root holes in undisturbed loess, the number and size of which directly affect the value of permeability coefficient. With the increase of pore diameter, the pore size distribution changes gradually, and the influence of small pores is gradually weakened, while the influence of large pores is more obvious. Therefore, only the pore ratio parameter used in engineering can not completely describe the pore characteristics of soil, it is necessary to introduce other microscopic parameters to describe.
Analysis of Traffic Flow Equilibrium in Urban Road Network Based on Floating Vehicle Data
Authors: Yu Yi , Gong Hui , Mo Xianglun
Published: May 2021

Based on the floating vehicle data, this paper analyzes the equilibrium of urban road network traffic flow. This can guide traffic flow distribution and provide reliable basis for traffic control. This paper starts with the quantitative analysis of the traffic network equilibrium, on the basis of verifying the validity of the floating car data, divides the urban road network into regions, and constructs an analysis model of the traffic flow equilibrium of the urban road network. The urban road traffic distribution model is constructed in accordance with the number of road traffic segments. On this basis, gini coefficient index is introduced to judge the road network flow balance, which is used to analyze the balance of each sub-region. By means of traffic guidance, signal control and other traffic control means, the traffic flow in each sub-area is balanced, and the traffic flow in the whole road network becomes balanced.