Biography:

In the past Xingxing Li has collaborated on articles with Yuanyuan Li and Ruiping Wu. One of their most recent publications is Hierarchical Porous Carbon Materials Derived from Self-Template Bamboo Leaves for Lithium–Sulfur Batteries. Which was published in journal Electrochimica Acta.

More information about Xingxing Li research including statistics on their citations can be found on their Copernicus Academic profile page.

Xingxing Li's Articles: (18)

Hierarchical Porous Carbon Materials Derived from Self-Template Bamboo Leaves for Lithium–Sulfur Batteries

Highlights•Bamboo leaves derived hierarchical porous carbon materials (HPCMs).•Biogenetic mesoporous SiO2 nanoparticles produce abundant mesovoids.•Hierarchically porous carbon is a good host to load sulfur for Li-S batteries.•The HPCMs/S cathode shows greatly improved electrochemical performance.

A novel neutralizing antibody against diverse clades of H5N1 influenza virus and its mutants capable of airborne transmission

Highlights•A novel mAb (HAb21) has been shown to possess a broadly neutralizing activity against all tested strains of H5N1.•HAb21 neutralizes diverse H5N1 variants with single or combination forms of mutations capable of airborne transmission.•HAb21 blocks the receptor-binding step by targeting a previously uncharacterized epitope at the tip of the HA head.

Effects of vortex generators on aerodynamic performance of thick wind turbine airfoils

Highlights•The effects of VGs on thick wind turbine airfoils have been investigated experimentally.•The results of two experiment-setups are compared and show positive effects on aerodynamic performance of thick airfoils.•VGs are suggested to be installed at x>0.2c to avoid Cl decrease at small AoA.•Two-row layout of VGs is very case sensitive and should be optimized when applying on real rotor blades.

Research ArticleOsMADS27 regulates the root development in a NO3−—Dependent manner and modulates the salt tolerance in rice (Oryza sativa L.)

Highlights•OsMADS27 overxpression inhibits the primary root elongation, but enhances the lateral root formation in a NO3−––dependent manner.•OsMADS27 regulates the root development by affecting ABA accumulation.•OsMADS27 physically interacts with Della protein OsSLR1, which forms a dimer complex with ABA–INSENSITIVE5 (OsABI5).•OsMADS27 overexpression can enhance the tolerance to salt stress.

Full Length ArticleAdherent and low friction nanocrystalline diamond films via adsorbing organic molecules in self-assembly seeding process

Highlights•The nanodiamond seeding solution was stabilized by addition of lysine.•The nucleation density of diamond on cemented carbide was highly enhanced.•Diamond film adhesion was strongly enhanced.•The friction coefficient was significantly reduced.

Electrostatic self-assembly seeding strategy to improve machining performance of nanocrystalline diamond coated cutting tools

Highlights•The ND colloid solution was stabilized by addition of TMAEMC.•The diamond nucleation density was enhanced up to 1011 cm−2.•The film adhesion was enhanced and sufficient for Al-Si alloy dry machining.•The wear resistance was 15 times higher than untreated and commercial one.•Higher surface quality of workpiece was obtained.

An electromagnetic oscillation method for stress measurement of steel strands

Highlights•Nondestructive measurement on steel strands of infrastructures is important.•An EMO method for stress measurement of steel strands is proposed.•Oscillation frequency of the EMO sensor reflects the steel strands’ stress change.•Function relation between frequency and stress of the steel strand is established.

The interactive effects of diclofop-methyl and silver nanoparticles on Arabidopsis thaliana: Growth, photosynthesis and antioxidant system☆

Highlights•DM and AgNPs have an antagonistic effect on the growth of A. thaliana.•DM reduced Ag+ release from AgNPs solution.•DM decreased Ag element absorption by plant tissue.

Predicting atmospheric delays for rapid ambiguity resolution in precise point positioning

AbstractInteger ambiguity resolution in precise point positioning (PPP) can shorten the initialization and re-initialization time, and ambiguity-fixed PPP solutions are also more reliable and accurate than ambiguity-float PPP solutions. However, signal interruptions are unavoidable in practical applications, particularly while operating in urban areas. Such signal interruptions can cause discontinuity of carrier phase arc, which introduces new integer ambiguities. Usually it will take approximately 15 min of continuous tracking to a reasonable number of satellites to fix new integer ambiguities. In many applications, it is impractical for a PPP user to wait for such a long time for the re-initialization. In this paper, a method for rapid ambiguity fixing in PPP is developed to avoid such a long re-initialization time. Firstly, the atmospheric delays were estimated epoch by epoch from ambiguity-fixed PPP solutions before the data gap or cycle slip occurs. A random walk procedure is then applied to predict the atmospheric delays accurately over a short time span. The predicted atmospheric delays then can be used to correct the observations which suffer from signal interruptions. Finally, the new ambiguities can be fixed with a distinct WL-LX-L3 (here LX denotes either of L1, L2) cascade ambiguity resolution strategy. Comprehensive experiments have demonstrated that the proposed method and strategy can fix zero-difference integer ambiguities successfully with only a single-epoch observation immediately after a short data gap. This technique works even when all satellites are interrupted at the same time. The duration of data gap bridged by this technique could be possibly extended if a more precise atmospheric delay prediction is found or on-the-fly (OTF) technology is applied. Based on the proposed method, real-time PPP with integer ambiguity fixing becomes more feasible in practice.

Retrieving real-time precise co-seismic displacements with a standalone single-frequency GPS receiver

AbstractNowadays, Global Positioning System (GPS) plays an increasingly important role in retrieving real-time precise co-seismic displacements for geo-hazard monitoring and early warning. Several real-time positioning approaches have been demonstrated for such purpose, such as real-time kinematic relative positioning, precise point positioning, etc., where dual-frequency geodetic receivers are applied for the removal of ionosphere delays by inter-frequency combination. At the same time, it would be also useful to develop efficient algorithms for estimating precise displacements with low-cost GPS receivers since they can make a denser network or multi-sensors combination without putting too much financial burden. In this contribution, we present a new method to retrieve precise co-seismic displacements in real-time using a standalone single-frequency receiver. In the new method, observations prior to an earthquake are utilized to establish a precise ionospheric delay prediction model, so that precise co-seismic displacements can be obtained without any convergence process. Our method was validated with an outdoor experiment as well as by re-processing of 1-Hz GPS data collected by the GEONET network during the 2011 Tohoku Mw 9.0 earthquake. For the latter, RMS against dual-frequency receivers constituted 2 cm for horizontal components and 3 cm for the vertical component.We specially address the observation biases and their impact on the accuracy of single frequency positioning. Our approach makes real-time GPS displacement monitoring with dense network much more affordable in terms of financial costs.

Satellite availability and point positioning accuracy evaluation on a global scale for integration of GPS, GLONASS, BeiDou and Galileo

AbstractWith the recent revitalization of GLONASS constellation and two newly emerging constellations of BeiDou and Galileo, multi-constellation integration has become a trend in Global Navigation Satellite System (GNSS) development. In order to provide a good indication of the positioning and navigation performance under the current GNSS constellations for the global users, the availability of four-constellation integration with GPS, GLONASS, BeiDou and Galileo should be investigated. In this study, the availability with the use of 31 GPS satellites, 24 GLONASS satellites, 18 BeiDou satellites and 11 Galileo satellites on a global scale is evaluated in terms of the number of visible satellites, the Position Dilution of Precision (PDOP) and the percentage of time span over which the position solutions can be acquired over the total time span during approximately a repeat cycle of orbits for all types of satellites. The effects of compatibility between different satellite systems on availability are discussed. In addition, datasets collected at 59 globally distributed four-system stations on 30 consecutive days are employed to fully assess the performance of four-constellation integrated dual-frequency precise point positioning (PPP), single-frequency PPP and single point positioning (SPP). The results indicate that the multi-constellation integration can significantly improve the availability and positioning accuracy. The enhancement of compatibility can also improve the availability. The availability can reflect the positioning performance.

Performance analysis of PPP ambiguity resolution with UPD products estimated from different scales of reference station networks

AbstractInteger ambiguity fixing with uncalibrated phase delay (UPD) products can significantly shorten the initialization time and improve the accuracy of precise point positioning (PPP). Since the tracking arcs of satellites and the behavior of atmospheric biases can be very different for the reference networks with different scales, the qualities of corresponding UPD products may be also various. The purpose of this paper is to comparatively investigate the influence of different scales of reference station networks on UPD estimation and user ambiguity resolution. Three reference station networks with global, wide-area and local scales are used to compute the UPD products and analyze their impact on the PPP-AR. The time-to-first-fix, the unfix rate and the incorrect fix rate of PPP-AR are analyzed. Moreover, in order to further shorten the convergence time for obtaining precise positioning, a modified partial ambiguity resolution (PAR) and corresponding validation strategy are presented. In this PAR method, the ambiguity subset is determined by removing the ambiguity one by one in the order of ascending elevations. Besides, for static positioning mode, a coordinate validation strategy is employed to enhance the reliability of the fixed coordinate. The experiment results show that UPD products computed by smaller station network are more accurate and lead to a better coordinate solution; the PAR method used in this paper can shorten the convergence time and the coordinate validation strategy can improve the availability of high precision positioning.

A new optimization approach to improve the overall performance of thick wind turbine airfoils

Highlights•An optimization method to improve performance of scaled thick airfoil is proposed.•The design focuses on the overall performance based on the blade's requirement.•Airfoils' performance evaluation indicators is employed to orient the overall design.•Genetic algorithm is employed to deal with optimization of multi-design-objective.•Achievement of the desirable airfoil validates the proposed method.

Immunoproteomics selection of cross-protective vaccine candidates from Riemerella anatipestifer serotypes 1 and 2

AbstractRiemerella anatipestifer (RA) is one of the most important bacterial pathogens of ducks and other avian species worldwide. Current approaches for controlling RA are hindered by the absence of effective vaccines, particularly cross-protective vaccines. In this present study, an immunoproteomics approach was used to identify cross-protective vaccine candidates against RA serotype 1 strain RAf63 and serotype 2 strain RAf153. First, whole-cell and secreted proteins of RAf153 and RAf63 were separated by two-dimensional gel electrophoresis. Then, western blotting of the proteome was performed using duck convalescent serum against RAf153, followed by matrix-assisted laser desorption/ionization time of flight mass spectrometry and peptide mass fingerprinting. Finally, common immunoreactive proteins from RAf153 and RAf63 were identified as cross-protective vaccine candidates, and so these were cloned and expressed recombinantly. The cross-protection abilities of purified recombinant protein vaccines were tested against homologous and heterologous virulent strains in a challenge model that followed vaccination. Six proteins were identified as cross-protective vaccine candidates. Three of these proteins showed reactivity with convalescent sera after prokaryotic expression, and the recombinant outer membrane protein A (OmpA) showed high protective indices against challenges with RAf153 (60%) and RAf63 (50%). In summary, we have developed a high-throughout, accurate, rapid and efficient method for the successful selection of cross-protective vaccine candidates.

Diclofop-methyl affects microbial rhizosphere community and induces systemic acquired resistance in rice

AbstractDiclofop-methyl (DM), a widely used herbicide in food crops, may partly contaminate the soil surface of natural ecosystems in agricultural area and exert toxic effects at low dose to nontarget plants. Even though rhizosphere microorganisms strongly interact with root cells, little is known regarding their potential modulating effect on herbicide toxicity in plants. Here we exposed rice seedlings (Xiushui 63) to 100 μg/L DM for 2 to 8 days and studied the effects of DM on rice rhizosphere microorganisms, rice systemic acquired resistance (SAR) and rice-microorganisms interactions. The results of metagenomic 16S rDNA Illumina tags show that DM increases bacterial biomass and affects their community structure in the rice rhizosphere. After DM treatment, the relative abundance of the bacterium genera Massilia and Anderseniella increased the most relative to the control. In parallel, malate and oxalate exudation by rice roots increased, potentially acting as a carbon source for several rhizosphere bacteria. Transcriptomic analyses suggest that DM induced SAR in rice seedlings through the salicylic acid (but not the jasmonic acid) signal pathway. This response to DM stress conferred resistance to infection by a pathogenic bacterium, but was not influenced by the presence of bacteria in the rhizosphere since SAR transcripts did not change significantly in xenic and axenic plant roots exposed to DM. The present study provides new insights on the response of rice and its associated microorganisms to DM stress.

Immobilization of SMG1-F278N lipase onto a novel epoxy resin: Characterization and its application in synthesis of partial glycerides

Highlights•SMG1-F278N was covalently immobilized onto a novel epoxy resin ECR8285.•The immobilized SMG1-F278N improved their performance in wider ranges of pH and temperature.•Thermostability of SMG1-F278N was significantly improved after immobilization.•High yield (79%) of partial glycerides was obtained by immobilized SMG1-F278N-catalyzed esterification of glycerol and oleic acids.•The immobilized SMG1-F278N kept 98% of its initial activity after being used for 7 cycles.

Full paperSpatially confined synthesis of vanadium nitride nanodots intercalated carbon nanosheets with ultrahigh volumetric capacitance and long life for flexible supercapacitors

Highlights•0D-in-2D structured VN nanodots intercalated carbon nanosheets (VNNDs/CNSs).•Spatially confined synthesis of VNNDs/CNSs via nitriding organic-inorganic hybrid PANI/V2O5.•VNNDs/CNSs show an ultrahigh volumetric capacitance of 1203.6 F cm−3 and long life.•The VNNDs/CNSs electrode with 150 µm thickness has large volumetric capacitance.

ORIGINAL ARTICLEBiosynthesis of antibiotic chuangxinmycin from Actinoplanes tsinanensis

AbstractChuangxinmycin is an antibiotic isolated from Actinoplanes tsinanensis CPCC 200056 in the 1970s with a novel indole-dihydrothiopyran heterocyclic skeleton. Chuangxinmycin showed in vitro antibacterial activity and in vivo efficacy in mouse infection models as well as preliminary clinical trials. But the biosynthetic pathway of chuangxinmycin has been obscure since its discovery. Herein, we report the identification of a stretch of DNA from the genome of A. tsinanensis CPCC 200056 that encodes genes for biosynthesis of chuangxinmycin by bioinformatics analysis. The designated cxn cluster was then confirmed to be responsible for chuangxinmycin biosynthesis by direct cloning and heterologous expressing in Streptomyces coelicolor M1146. The cytochrome P450 CxnD was verified to be involved in the dihydrothiopyran ring closure reaction by the identification of seco-chuangxinmycin in S. coelicolor M1146 harboring the cxn gene cluster with an inactivated cxnD. Based on these results, a plausible biosynthetic pathway for chuangxinmycin biosynthesis was proposed, by hijacking the primary sulfur transfer system for sulfur incorporation. The identification of the biosynthetic gene cluster of chuangxinmycin paves the way for elucidating the detail biochemical machinery for chuangxinmycin biosynthesis, and provides the basis for the generation of novel chuangxinmycin derivatives by means of combinatorial biosynthesis and synthetic biology.

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