bluuebunny/crossref_metadata_2025 huggingface dataset:
Multiplicative topological phases
Authors: Cook Ashley M. , Moore Joel E.
Published: October 2022

Symmetry-protected topological phases of matter have challenged our understanding of condensed matter systems and harbour exotic phenomena promising to address major technological challenges. Considerable understanding of these phases of matter has been gained recently by considering additional protecting symmetries, different types of quasiparticles, and systems out of equilibrium. Here, we show that symmetries could be enforced not just on full Hamiltonians, but also on their components. We construct a large class of previously unidentified multiplicative topological phases of matter characterized by tensor product Hilbert spaces similar to the Fock space of multiple particles. To demonstrate our methods, we introduce multiplicative topological phases of matter based on the foundational Hopf and Chern insulator phases, the multiplicative Hopf and Chern insulators (MHI and MCI), respectively. The MHI shows the distinctive properties of the parent phases as well as non-trivial topology of a child phase. We also comment on a similar structure in topological superconductors as these multiplicative phases are protected in part by particle-hole symmetry. The MCI phase realizes topologically protected gapless states that do not extend from the valence bands to the conduction bands for open boundary conditions, which respects to the symmetries protecting topological phase. The band connectivity discovered in MCI could serve as a blueprint for potential multiplicative topology with exotic properties.
Metabolic reconfiguration enables synthetic reductive metabolism in yeast
Authors: Yu Tao , Liu Quanli , Wang Xiang , Liu Xiangjian , Chen Yun , Nielsen Jens
Published: October 2022

Cell proliferation requires the integration of catabolic processes to provide energy, redox power and biosynthetic precursors. Here we show how the combination of rational design, metabolic rewiring and recombinant expression enables the establishment of a decarboxylation cycle in the yeast cytoplasm. This metabolic cycle can support growth by supplying energy and increased provision of NADPH or NADH in the cytosol, which can support the production of highly reduced chemicals such as glycerol, succinate and free fatty acids. With this approach, free fatty acid yield reached 40% of theoretical yield, which is the highest yield reported for Saccharomyces cerevisiae to our knowledge. This study reports the implementation of a synthetic decarboxylation cycle in the yeast cytosol, and its application in achieving high yields of valuable chemicals in cell factories. Our study also shows that, despite extensive regulation of catabolism in yeast, it is possible to rewire the energy metabolism, illustrating the power of biodesign.
Multiple particle tracking (MPT) using PEGylated nanoparticles reveals heterogeneity within murine lymph nodes and between lymph nodes at different locations
Authors: Ramirez Ann , Merwitz Brooke , Lee Hannah , Vaughan Erik , Maisel Katharina
Published: October 2022

Dense coatings with polyethylene glycol (PEG) allow nanoparticles to diffuse within the LN extracellular spaces revealing pore sizes ranging from 500 nm–1.5 μm, contrary to previous literature that predicted pores to be 10–20 μm.
Controlling liquid–liquid phase separation of G-quadruplex-forming RNAs in a sequence-specific manner
Authors: Tsuruta Mitsuki , Torii Takeru , Kohata Kazuki , Kawauchi Keiko , Tateishi-Karimata Hisae , Sugimoto Naoki , Miyoshi Daisuke
Published: October 2022

We constructed a minimum liquid–liquid phase separation model system using only G-quadruplex-forming oligonucleotides and cationic oligopeptides. Moreover, droplet redissolution was achieved in a sequence-specific manner.
Hybrid density functional theory calculations for the electronic and optical properties of Fe3+-doped KDP crystals
Authors: Li Yang , Liu Baoan , Li Yanlu , Sui Tingting , Zhao Xian , Xu Mingxia , Sun Xun
Published: October 2022

The FeK2+ defect introduces two defect states (at 2.4 eV and 6.6 eV) into the bandgap of the KDP crystal as well as absorption peaks at around 278 nm in the xy plane.
Assessing the donor ability of boratabenzene and 9-borataphenanthrene anions through metal complexes with carbonyl ligands
Authors: Rojales Katherine , Tamizmani Masilamani , Bartholome Tyler A. , Martin Caleb D.
Published: October 2022

A series of anionic group 6 tricarbonyl and neutral rhodium dicarbonyl complexes featuring substituted boratabenzene and borataphenanthrene ligands are prepared and the donor strengths of the boracyclic ligands are assessed.
Study on the effect of a tea polyphenol disinfectant on antibiotic resistance genes in drinking water
Authors: Li Jing , Feng Cuimin , Xin Bo
Published: October 2022

In order to improve the ability of ozone (O3) and ultraviolet (UV) disinfection to remove antibiotic resistance genes (ARGs) and reduce the risk of DBPs, tea polyphenols (TPs) instead of chlorine preparations were used as auxiliary disinfectant.
It's ok to be outnumbered – sub-stoichiometric modulation of homomeric protein complexes
Authors: Dimitrova Yoana N. , Gutierrez Jemy A. , Huard Kim
Published: October 2022

Recent literature examples of small molecules reported to modulate a homomeric protein complex at sub-stoichiometric concentrations were selected to discuss implications on drug discovery efforts.
Synthesis and structure–activity relationship studies of N-terminal analogues of the lipopeptide antibiotics brevicidine and laterocidine
Authors: Ballantine Ross D. , Al Ayed Karol , Bann Samantha J. , Hoekstra Michael , Martin Nathaniel I. , Cochrane Stephen A.
Published: October 2022

SAR studies on brevicidine and laterocidine yield new analogues with strong activity against multidrug-resistant Gram-negative bacteria.
Adsorption oxidation desulfurization of model fuel by mesoporous SiO2 supported deep eutectic solvents TBAB/PEG-200
Authors: Guo Yanwen , Liu Xingjian , Hu Bing
Published: October 2022

A novel supported deep eutectic solvent (DES) TBAB/PEG-200 was prepared by loading DES TBAB/PEG-200 onto mesoporous silica by the sol–gel method.
A new phosphoramidite enables orthogonal double labelling to form combination oligonucleotide probes
Authors: Bai Chunsen , Klimkowski Piotr , Jin Cheng , Kuchlyan Jagannath , El-Sagheer Afaf H. , Brown Tom
Published: October 2022

A novel phosphoramidite (AP-C3 dT) containing an alkyne and amine has been synthesized, enabling orthogonal labelling for combination oligonucleotides probes.
Multimodal dynamic color-tunable persistent luminescent phosphor Ca3Al2Ge3O12:Mn2+,Cr3+ for anti-counterfeiting and industrial inspection
Authors: Zhang Jiawei , Wang Zhijun , Huo Xiaoxue , Wang Yu , Li Panlai
Published: October 2022

Ca3Al2Ge3O12:Mn2+,Cr3+ may be used in anti-counterfeiting and industrial inspection.
Rational design of arsine catalysts for arsa-Wittig reaction
Authors: Yukiyasu Junya , Inaba Ryoto , Yumura Takashi , Imoto Hiroaki , Naka Kensuke
Published: October 2022

An acyclic arsine catalyst has been developed for the room-temperature catalytic arsa-Wittig reaction. The reaction mechanism has been computationally analyzed.
NHPI-catalyzed electrochemical C–H alkylation of indoles with alcohols to access di(indolyl)methanes via radical coupling
Authors: Li Bingwen , Qin Hongyun , Yan Kelu , Ma Jing , Yang Jianjing , Wen Jiangwei
Published: October 2022

The present indirect electrochemically mediated radical protocol outperforms the traditional Friedel–Crafts route with a broad substrate scope and functional group tolerance, as well as facile gram-scale synthesis without metal contamination.
A novel expansive soil hardener: performance and mechanism of immersion stability
Authors: Mei Tao , Lan Jirong , Dong Yiqie , Zhang Shanshan , Tao Huiting , Hou Haobo
Published: October 2022

Aiming at the existing problems of poor treatment effect and immersion stability of expansive soils, a slag soil hardener (SSH, developed by Wuhan University, China) was combined with different additives to dispose in this study.
Theoretical study on the stability, ferroelectricity and photocatalytic properties of CaBiO3
Authors: Xu Xiang-Fu , Chen Li-Fang , Xu Hua-Kai , Lai Guo-Xia , Hu Su-Mei , Ji Hong , Tang Jia-Jun , Chen Xing-Yuan , Zhu Wei-Ling
Published: October 2022

CaBiO3 under tensile strain can maintain high ferroelectric polarization strength and strong visible light absorption ability, further promoting photocatalytic hydrogen production.
Engineering of appropriate pore size combined with sulfonic functionalization in a Zr-MOF with reo topology for the ultra-high removal of cationic malachite green dye from an aqueous medium
Authors: Nguyen My V. , Nguyen Hung N. , Nguyen Tuyet A. T. , Nguyen Khang M. V.
Published: October 2022

A Zr-based metal–organic framework with reo topology, denoted as Reo-MOF-1, was fabricated through a solvothermal method capable of efficiently removing the cationic MG dye from an aqueous medium.
A copper-catalyzed four-component reaction of arylcyclopropanes, nitriles, carboxylic acids and N-fluorobenzenesulfonimide: facile synthesis of imide derivatives
Authors: Yang Shengbiao , Liu Chunyang , Shangguan Xiaoyan , Li Yan , Zhang Qian
Published: October 2022

An unprecedented copper-catalyzed four-component reaction of arylcyclopropanes, nitriles, carboxylic acids and N-fluorobenzenesulfonimide (NFSI) has been successfully developed, efficiently synthesizing diverse imide derivatives.
Defect engineered (Er3+/Nd3+) codoped TiO2 photoanodes for enhanced photoelectrochemical and photovoltaic applications
Authors: Katta Venkata Seshaiah , Velpandian Muthuraja , Challapalli Subrahmanyam , Meduri Praveen , Raavi Sai Santosh Kumar
Published: October 2022

Herein, we describe an elegant way to engineer the electronic energy defects and achieve the defect passivation of codoping of two rare-earth (RE) ions, namely, neodymium (Nd3+) and erbium (Er3+), into the TiO2 lattice.
Combined description of pressure–volume–temperature and dielectric relaxation of several polymeric and low-molecular-weight organic glass-formers using SL-TS2 approach
Authors: Ginzburg Valeriy V. , Zaccone Alessio , Casalini Riccardo
Published: October 2022

We apply our “SL-TS2” (two-state Sanchez–Lacombe) model to simultaneously describe dielectric α-relaxation time, τα, and pressure–volume–temperature (PVT) data for multiple polymer and organic glass-formers.
Synergy of Hofmeister effect and ligand crosslinking enabled the facile fabrication of super-strong, pre-stretching-enhanced gelatin-based hydrogels
Authors: Zeng Cheng , Wu Pengxi , Guo Jinglun , Zhao Nan , Ke Cheng , Liu Guoqiang , Zhou Feng , Liu Weimin
Published: October 2022

A hydrogel has ultra-high mechanical strength with good self-recovery properties and can be further reinforced by pre-stretching. The hybrid hydrogel has a stimulating correspondence to ion concentration and has great potential as an actuator.
Physical aging of hydroxypropyl methylcellulose acetate succinate via enthalpy recovery
Authors: Seo Yejoon , Zuo Biao , Cangialosi Daniele , Priestley Rodney D.
Published: October 2022

There are two regimes of physical aging behavior for HPMCAS: near-Tg and well below Tg. The latter regime exhibits significant thermodynamic evolution, despite the assumed kinetic stability.
An organic additive assisting with high ionic conduction and dendrite resistance of polymer electrolytes
Authors: Guan Shundong , Wen Kaihua , Liang Ying , Xue Chuanjiao , Liu Sijie , Yu Jinyao , Zhang Zheng , Wu Xinbin , Yuan Haocheng , Lin Zhiyuan , Yu Haijun , Li Liangliang , Nan Ce-Wen
Published: October 2022

2-Acrylamido-2-methylpropane sulfonic acid (AMPS) is used as an organic additive for poly(vinylidene fluoride) (PVDF)-based polymer electrolytes to assist with the fast Li-ion conduction and formation of a stable interface.
The impact of residual solvent on catholyte performance in solid-state batteries
Authors: Shen Fengyu , Jonson Robert A. , Tucker Michael C.
Published: October 2022

The residual solvent in the solid catholyte of solid-state batteries enhances its ionic conductivity and cyclability, especially at low temperatures.
A fluorinated O3-type layered cathode for long-life sodium-ion batteries
Authors: Yu Tae-Yeon , Sun Yang-Kook
Published: October 2022

The fluorination of O3-type layered Na[Ni0.5Mn0.5]O2 cathodes effectively mitigates destructive phase transitions and concomitant microcracking and suppresses the parasitic reaction with electrolyte.
Stability improvement of a Pt/TiO2 photocatalyst during photocatalytic pure water splitting
Authors: Zhang Xinyi , Bo Chunling , Cao Shuang , Cheng Zhijie , Xiao Zhaozhong , Liu Xiaolong , Tan Ting , Piao Lingyu
Published: October 2022

The Pt/b-TiO2 NF photocatalyst is deactivated due to the accumulation of product H2 inhibits forward reaction and gradual substitution of H2O2 for H2O in the absorption site on the photocatalyst surface, its stability can be improved in a simple way.
Stabilizing the surface of Ni-rich cathodes via facing-target sputtering for high-performance lithium-ion batteries
Authors: Kim Jong Heon , Park Jun-Seob , Cho Su-Ho , Park Ji-Min , Nam Jong Seok , Yoon Soon-Gil , Kim Il-Doo , Jung Ji-Won , Kim Hyun-Suk
Published: October 2022

Ni-rich cathode-electrolyte interface is stabilized by using an ultra-thin Al2O3 protective layer deposited by face-to-face target sputtering (FTS) for high-performance lithium-ion batteries.
An S-scheme α-Fe2O3/g-C3N4 heterojunction nanostructure with superior visible-light photocatalytic activity for the aza-Henry reaction
Authors: Li Zhen , Zhang Jiamei , Wu Rujing , Qiu Ping , Yao Yue , Liao Xiaoyuan , Jiang Yan , Shi Jiawen , Chen Yi , Lu Shuxiang
Published: October 2022

A S-scheme α-Fe2O3/g-C3N4 composite was designed and fabricated. The α-Fe2O3/g-C3N4 showed improved photocatalytic activity for Aza-Henry reaction. S-scheme mode of charge transfer in composite enhanced the catalytic performance.
Multifunctional all hydrogel-based smart dressing system fabricated by a self-healing cross-linking strategy for real-time monitoring of wound temperature, strain and on-demand drug delivery
Authors: Ge Si-jia , Zhou Xiao-Jin , Liu Shi-Lian , Xu Min , Shi Yu , Geng Jian , Li Jiajia , Jia Rui-peng , Gu Zhong-Ze , Xu Hua
Published: October 2022

A smart all-hydrogel-based dressing fabricated by a self-healing cross-linking strategy can achieve effective monitoring of wound temperature, mechanical strain and on-demand drug delivery to inhibit bacterial growth in order to promote wound healing.
A review of market power‐mitigation mechanisms in electricity markets
Authors: Lin Xueshan , Wang Beibei , Xiang Zhongming , Zheng Yaxian
Published: October 2022

Participants in the supply and demand sides of electricity markets can potentially exercise their market power for their benefits. Hence, market power mitigation is an essential component of market management that physically and economically benefits operators by ensuring fairness in deregulated electricity markets. However, the mechanisms of mitigating market power in electricity markets pose several challenges in terms of market structure monitoring, market power evaluation, and market power mitigation. Therefore, this study provides a comprehensive analysis of market power mitigation mechanisms in electricity markets. First, a review of market structure monitoring and market power evaluation methods is provided to assess participants’ potential and degree of use/abuse of market power. Then, a detailed review of optimal bidding strategies in the supply and demand sides of electricity markets is provided. Accordingly, a systematic classification of market power mitigation is described. Finally, market power mitigation challenges and potential future research directions are discussed.
Razor-thin dust layers in protoplanetary disks: Limits on the vertical shear instability
Authors: Dullemond C. P. , Ziampras A. , Ostertag D. , Dominik C.
Published: October 2022

Context. Recent observations with the Atacama Large Millimeter Array (ALMA) have shown that the large dust aggregates observed at millimeter wavelengths settle to the midplane into a remarkably thin layer. This sets strong limits on the strength of the turbulence and other gas motions in these disks.

Aims. We intend to find out if the geometric thinness of these layers is evidence against the vertical shear instability (VSI) operating in these disks. We aim to verify if a dust layer consisting of large enough dust aggregates could remain geometrically thin enough to be consistent with the latest observations of these dust layers, even if the disk is unstable to the VSI. If this is falsified, then the observed flatness of these dust layers proves that these disks are stable against the VSI, even out to the large radii at which these dust layers are observed.

Methods. We performed hydrodynamic simulations of a protoplanetary disk with a locally isothermal equation of state, and let the VSI fully develop. We sprinkled dust particles with a given grain size at random positions near the midplane and followed their motion as they got stirred up by the VSI, assuming no feedback onto the gas. We repeated the experiment for different grain sizes and determined for which grain size the layer becomes thin enough to be consistent with ALMA observations. We then verified if, with these grain sizes, it is still possible (given the constraints of dust opacity and gravitational stability) to generate a moderately optically thick layer at millimeter wavelengths, as observations appear to indicate.

Results. We found that even very large dust aggregates with Stokes numbers close to unity get stirred up to relatively large heights above the midplane by the VSI, which is in conflict with the observed geometric thinness. For grains so large that the Stokes number exceeds unity, the layer can be made to remain thin, but we show that it is hard to make dust layers optically thick at ALMA wavelengths (e.g., τ1.3mm ≳ 1) with such large dust aggregates.

Conclusions. We conclude that protoplanetary disks with geometrically thin midplane dust layers cannot be VSI unstable, at least not down to the disk midplane. Explanations for the inhibition of the VSI out to several hundreds of au include a high dust-to-gas ratio of the midplane layer, a modest background turbulence, and/or a reduced dust-to-gas ratio of the small dust grains that are responsible for the radiative cooling of the disk. A reduction of small grains by a factor of between 10 and 100 is sufficient to quench the VSI. Such a reduction is plausible in dust growth models, and still consistent with observations at optical and infrared wavelengths.
GBT/MUSTANG-2 9″ resolution imaging of the SZ effect in MS0735.6+7421
Authors: Orlowski-Scherer John , Haridas Saianeesh K. , Di Mascolo Luca , Sarmiento Karen Perez , Romero Charles E. , Dicker Simon , Mroczkowski Tony , Bhandarkar Tanay , Churazov Eugene , Clarke Tracy E. , Devlin Mark , Gaspari Massimo , Lowe Ian , Mason Brian , Sarazin Craig L. , Sievers Jonathon , Sunyaev Rashid
Published: October 2022

Context.Mechanical feedback from active galactic nuclei is thought to be the dominant feedback mechanism quenching cooling flows and star formation in galaxy cluster cores. It, in particular, manifests itself by creating cavities in the X-ray emitting gas, which are observed in many clusters. However, the nature of the pressure supporting these cavities is not known.

Aims.Using the MUSTANG-2 instrument on the Green Bank Telescope (GBT), we aimed to measure thermal Sunyaev-Zeldovich (SZ) effect signals associated with the X-ray cavities in MS0735.6+7421, a moderate-mass cluster that hosts one of the most energetic active galactic nucleus outbursts known. We used these measurements to infer the level of nonthermal sources of pressure that support the cavities, such as magnetic fields and turbulence, as well as relativistic and cosmic ray components.

Methods.We used the preconditioned gradient descent method to fit a model for the cluster, cavities, and central point source directly to the time-ordered data of the MUSTANG-2 signal. We used this model to probe the thermodynamic state of the cavities.

Results.We show that the SZ signal associated with the cavities is suppressed compared to the expectations for a thermal plasma with temperatures of a few tens of keV. The smallest value of the suppression factor,f, that is consistent with the data is ∼0.4, lower than what has been inferred in earlier work. Larger values offare possible once the contribution of the cocoon shock surrounding the cavities is taken into account.

Conclusions.We conclude that in the “thermal” scenario, when half of the pressure support comes from electrons with a Maxwellian velocity distribution, the temperature of these electrons must be greater than ∼100 keV at 2.5σconfidence. Alternatively, electrons with nonthermal momentum distribution could contribute to the pressure, although existing data do not distinguish between these two scenarios. The baseline model with cavities located in the sky plane yields a best-fitting value of the thermal SZ signal suppression inside cavities off ∼ 0.5, which, at face value, implies a mix of thermal and nonthermal pressure support. Larger values off(up to 1, i.e., no thermal SZ signal from the cavities) are still possible when allowing for variations in the line-of-sight geometry.
Study on overwintering growth characteristics and purification effect of floating bed cultivated plants
Authors: Chen Hongbing , Zhang Wenna , Wan Weihong
Published: October 2022

Artificial floating bed technology has been used to repair eutrophic water. However, there are relatively few studies on the overwintering of economic plants on the floating bed. In order to realize the resource utilization of wastewater, celery, Artemisia selengensis, Garlic, Chinese yam, lettuce and other crops were selected as the test plants for the floating bed. Quantitative experimental study was conducted on the aquaculture wastewater in winter. The results showed that after 90 days of acclimation, the tested plants showed different growth characteristics, with the survival rates above 84.48%. The distribution of nitrogen and phosphorus in water and subsurface plants of 5 species were different. The contents of nitrogen and phosphorus in plants The accumulative amounts were 1.15 ~ 5.18 g·m-2 and 0.04 ~ 0.21 g·m-2, respectively, with the order of garlic > celery > seabuckthorn > sedum chrysanthemum> lettuce and celery> garlic> sesame oil> sesame oil> lettuce.
Research on the area of mechanized construction of transmission lines
Authors: Zhou Tiejun , Gan Jingshuang , Li Lingyun , Xia Zhongyuan
Published: October 2022

In order to continuously improve the construction capacity of power grid projects, improve the level of construction technology, and promote the transformation and upgrading of construction enterprises, power companies actively promote the mechanized construction of transmission lines. On the basis of summarizing the existing calculation rules of mechanized construction area, through on-site investigation and extensive collection of funds, research and excavate indicators that adapt to the new situation and new regulations. According to the actual area composition of the mechanized construction site, scientific calculation rules are formulated by modeling analysis and other methods. Compare and verify the calculated area of the new rule with the actual compensation area and the calculated area of the original rule, and propose a complete set of calculation rules for mechanized construction area, which has the conditions and value for popularization and application.
Analysis on the distribution characteristics of oil-water layer and potential-tapping effect of add-perforation in XX oilfield
Authors: Guo Yilin
Published: October 2022

XX oilfield has a total of 10,561 oil and water wells, 6,790 wells were drilled in the oil-water layer, but only 10.3% of the total wells were drilled in the oil-water layer, so the development degree of the same layer is relatively low. In the stage of water cut and stable production, the geological reserves of oil-water layer are considerable. Based on a large number of data statistics of oil-water layer, this paper understands the developed situation of oil-water layer and the characteristics of plane and vertical distribution, and discusses the feasibility of oil-water layer to add perforation and tap potential from the effect of added perforation well.
Study on asynchronous injection and production of horizontal Wells in ultra-low permeability thin layer low abundance oil field
Authors: Yang Guang
Published: October 2022

The ultra-low permeability, thin layer and low abundance GLN area is developed by waterinjection with horizontal and straight combined well pattern. With the extension of development time, the water appears in multiple sections and directions in horizontal Wells, and the well area gradually enters the stage of medium and high water cut, which shows the characteristics of rising when water is injected, falling when liquid is stopped, and limiting the profile control pressure in multiple rounds of Wells. Therefore, developing the “note when mining, mining without note” asynchronous injection-production adjustment of horizontal well technology, make full use of the artificial fracture of high permeability channel and matrix suction effect between low permeable formation permeability, increase the crack near the matrix suction swept volume, to achieve the purpose of the horizontal well steady liquid water control, up to the level of the special low permeability thin layer low abundance wellblock improve recovery factor. Through the mechanism of injection-production, the use of pore throat boundaries, the respect such as injection-production timing and parameter optimization research, combined with the reservoir numerical simulation and theoretical formula, conduct asynchronous injection-production field practice, improved the development effect of horizontal well, and have achieved good economic benefits, for the next class of reservoir level wellblock middle and high water cut stage to explore a new way of governance.
Study on Advanced Anchor - grouting Support of Mining Roadway in Close Lower Coal Seam
Authors: Lu Guozhi , Ni Ping , Li Xin , Niu Jinhua , Wang Tao
Published: October 2022

Aiming at the problems of difficult support of mining roadway under goaf of the close distance coal seam, obvious large deformation, and long-term continuous deformation of surrounding rock, an advanced bolt-grouting support system is proposed. The system can effectively solve the problem of roadway support from the design system, construction system, and monitoring and evaluation system, and realize the intelligent evaluation of bolt-grouting support. Based on the actual engineering background of 29204 working face in Dongqu Coal Mine, the supporting material and scheme, grouting parameters, and construction technology are studied and analyzed. Finally, the supporting scheme is adjusted and optimized timely by combining with the intelligent evaluation system of anchor grouting. The field practice results show that the advanced bolting-grouting support system has good applicability to roadway deformation under different conditions. The maximum subsidence of the roof in the test section is reduced by 73.48 % compared with the original support scheme, and the maximum stress of the anchor cable is reduced by 50.68 %. The research results provide a set of safe and effective support system and feasible technical ideas and methods to solve the problem of surrounding rock control of mining roadway under goaf of the close distance coal seam.
Design of Underwater Grinding Device for Nuclear Power Plant
Authors: Tian Guangzheng , Sha Hongwei , Fu Jianpeng , Zhou Jianhua , Li Chao
Published: October 2022

In order to solve the problems of difficulty in cleaning the inner wall of the hammer-shaped component in the RIC system of the nuclear power plant and the low surface accuracy after cleaning, a profiling cleaning system was designed. First, the working principle of profiling cleaning is introduced to ensure that the surface accuracy after cleaning meets the installation requirements. Secondly, in order to ensure the normal operation of the profiling airbag, a mechanical model between the air supply volume of the air pump and the force on the conical inner wall is derived. Finally, in order to accurately control the output torque of the motor, the PID method is used to control the output torque of the motor. The system can increase the success rate of cleaning the inner wall of the hammer-shaped component in the RIC system and improve the efficiency of nuclear power plants.
Research on capacity allocation optimization of a wind-photovoltaic-hybrid-battery power generation system with multi-energy complementary
Authors: Lei Yu , Xu Jianjun , Pan Lichao , Sun Dikang
Published: October 2022

The output of complementary energy is the core of power generation system planning, and researching its configuration is the basis for realizing safe, reliable, economical and stable operation of the system throughout total life cycle. This paper comprehensively considers the constraints of power supply reliability and battery energy storage operation, and proposes a capacity optimization method for wind-photovoltaic-hydro-storage system aiming at life cycle cost and unit cost of electricity. Take the Northwest Region as an example, the optimization problem was solved by HOMER software, the optimal capacity allocation result was obtained. Compared with other solutions, the life cycle cost was reduced by 12.1%, the unit cost of electricity was reduced by 11.9%, and the load power shortage rate probability was relatively reduced. The result prove that the complementary system helps to reduce power generation cost and improve power supply stability.
A Short-term Wind Power Prediction Framework based on Two-layer Decomposition and the Combination of Ensemble Model and Deep Network
Authors: Di Feichao
Published: October 2022

The time series of wind power is influenced by many external factors, showing strong volatility and randomness. Aiming at the problem of low prediction accuracy of wind power time series, this paper proposes a short-term wind power prediction framework based on two-layer decomposition and the combination of ensemble model and deep network, which is composed of complete ensemble empirical mode decomposition (CEEMD), sample entropy (SE), stacking ensemble, linear regression (LR), variational mode decomposition (VMD), long short term memory (LSTM) and multi-layer perceptron (MLP). Firstly, CEEMD is used to decompose the time series of wind power into different modes and then SE is used for reconstruction. Secondly, different models are applied to predict the different reconstruction components and select the optimal model. Subsequently, VMD is used to decompose the partially decomposed reconstruction components and a combined prediction model of stacking ensemble and LSTM is established. Finally, in order to further improve the prediction accuracy, MLP is applied to correct the error and the corrected error is superimposed with the prediction results and other reconstruction components to obtain the final predicted value. The simulation results show that the accuracy and effectiveness of this model is superior to the traditional model and the prediction accuracy of short-term wind power time series is improved effectively.
Research on Land Use Dynamic Change Based on RS Technique in The West Coast New Area of Qingdao
Authors: Wang Leibo , Zhang Chao , Wu Shuang
Published: October 2022

The West Coast New Area of Qingdao has witnessed a fast-developing economy and accelerated urbanization since its establishment as a national new area, which also leads to the rapid change of land utilization status. In such a context, ways of quickly monitoring land utilization changes and leveraging land resources more efficiently and intensively are practical problem that requires urgent settlement. Focusing on Landsat8 OLI images in 2013, 2017 and 2021 of the West Coast New Area of Qingdao, data of land utilization changes in three periods were first extracted using ENVI5.3 software. And then, land utilization was dynamically monitored with the post classification comparison method. Finally, the driving force was quantitatively analyzed from the perspectives of socio-economic development, population change, and policy in combination with document literature collected, which can provide data supports for land planning of the West Coast New Area of Qingdao with suggestions proposed.
Introduction to Marine Data Source Analysis and Sharing
Authors: Geng Shanshan , Liu Zhenmin , Shi Xiaoxiao
Published: October 2022

You should leave 8 mm of space above the abstract and 10 mm after the abstract. The heading Abstract should be typed in bold 9-point Times. The body of the abstract should be typed in normal 9-point Arial in a single paragraph, immediately following the heading. The text should be set to 1 line spacing. The abstract should be centred across the page, indented 17 mm from the left and right page margins and justified. It should not normally exceed 200 words.
Design of Flexible Interactive Platform System between Self-owned Power Plant and Power Grid
Authors: Zhu Lingkai , Wang Weishuai , Zhang Haijing , Wang Qian , Zheng Wei , Zhong Ziwei
Published: October 2022

In response to the call of the state to deepen power system reform, strengthen and standardize the supervision and management of coal-fired captive power plants, and implement regulation from the load side to effectively ensure the power supply and demand balance of the power grid, a flexible interactive platform system between captive power plants and the power grid is developed. The platform software has the functions of self owned power plant file management, resource adjustable potential analysis, operation state detection, energy consumption analysis, transaction management, etc., and the response time to power grid interactive instructions is less than 10 seconds.
Chinese medicines used as oilfield chemicals: A case of resource utilization of waste medicines
Authors: Zhang Yuxi
Published: October 2022

In order to explore the resource utilization of expired traditional Chinese medicine, in this study, three traditional Chinese medicines, LQC, BLG and HXZ were used to evaluate their inhibition effects on clay expansion rate and corrosion inhibition rate in acid solution by weight loss method and linear expansion test. The corrosion inhibition results reveal that the highest corrosion inhibition rate of HXZ at 1000mg/L is 67.65% in 3.0% HCl solution. Linear expansion experiments show that LQC and BLG have stronger inhibition effect when 1.2% of them are added to the drilling fluid, which is better than 4.0% KCl generally used as a reference to bentonite expansion inhibitor. HXZ can decrease the tg obviously in drilling fluid, which means it has a potential use as lubricants in drilling fluid.
Research on Working Condition Diagnosis of Submersible Screw Pump
Authors: Feng Changhui , Liu Chenwei , Li Mingzhong , Zeng Xu , Tian Mingming
Published: October 2022

As the development of each oil field enters the middle and late stage, sand production, wax deposition and the continuous increase of well depth, electric submersible screw pump wells frequently break down, and hidden troubles of equipment can not be found in time, which makes oil wells produce with faults. It increases the wear and tear of equipment, seriously affects the production of oil wells, and causes unnecessary economic losses. Therefore, improving the accuracy of the working condition diagnosis of the electric submersible screw pump production system plays a vital role in improving the overall management level of the electric submersible screw pump well. This can not only enhance the managers’ correct understanding of this kind of oil well system, but also comprehensively monitor the working state of the well. It can find the fault as soon as possible, analyze the cause of the fault, and avoid the accident by adjusting the production parameters, so that the downhole screw pump can work safely, reliably and effectively, and maximize the maintenance free period and economic benefits of the electric submersible screw pump well.
Water quality evaluation of typical Lake Wetland Parks around Dianchi Lake
Authors: Wang Ziyuan , Liu Xingyue , Wang Weichao , Li Wei
Published: October 2022

Dianchi Lake is one of the key management points of China’s “three rivers and three lakes basins”, and the construction of wetland park plays an important role in purifying Dianchi lake water body and maintaining the health of lake ecosystem. Based on single factor evaluation method and three improved Nemerow pollution index methods, this study evaluates water quality of South Dianchi Wetland Park, Xihua Wetland Park and Laoyu River Wetland Park, with concentrations of total nitrogen (TN), total phosphorous (TP), chemical oxygen demand (COD), zinc (Zn), nickel (Ni), cadmium (Cd), chromium (Cr), lead (Pb) specifically measured and monitored. The results showed that: (1) the pollution levels of COD, TN, TP and Cr in the three wetland parks are relatively high. (2) based on single factor evaluation method and the improved Nemerow pollution index method, the evaluation grade of the water quality of the three wetland parks is inferior to Grade V. On the whole, the water pollution of Laoyu River Wetland Park is the most worrisome, and the water pollution of South Dianchi and Xihua Wetland Park is slightly better. (3) COD and TP are the main types of pollutants entering the lake in the basins where the three wetland parks are located. Therefore, immediate attention should be paid to the management of water quality state of Dianchi Lake, and the treatment of urban, agricultural non-point source and some uncollected point source pollution should be further strengthened.
Elastic impedance inversion method based on Quantum Annealing MH algorithm
Authors: Zhao Chen , Jin Fengming , Han Guomeng , Guo Shuwen , Wang Pengtao , Wang Delu , Guan Wei
Published: October 2022

Seismic inversion is one of the important methods to realize reservoir prediction in oil and gas field exploration. The seismic stochastic inversion based on Metropolis-Hastings algorithm makes full use of well logging data and improves the vertical resolution of inversion results. However, conventional Metropolis-Hastings algorithm has slow convergence speed and poor stability. In this paper, an elastic impedance inversion method based on optimized Metropolis-Hastings algorithm is established by combining quantum annealing algorithm with Metropolis-Hastings algorithm. The feasibility of the method is verified by model calculation and actual data test.
Study on oil-water interface of Budate fracture reservoir in each block of Suderte Oilfield
Authors: Liu Yuhang
Published: October 2022

It is well known that in addition to bound water in the reservoir, formation water mainly exists in the form of edge water and bottom water. Fractured buried hill metamorphic rock reservoirs are generally bottom-water reservoirs. In fractured reservoirs, rock blocks are cut by fractures and oil and water are distributed in fractures. Due to the low capillary pressure of fractures, the oil-water transition zone is also small. In the same fault block, there is relatively uniform oil-water interface. And oil-water interface to judge correctly or not will directly related to the determination of oil-bearing area and effective thickness division and well placement, thus correctly determine the position of the oil-water interface of oil field development is of great significance, through the variation of oil-water interface also presumably or some guidance on the seismic section can't precisely divide the small fault.
Analysis of the causes of rising water content in the late stage of poly-drive in western block III of Area B and study of adjustment methods
Authors: Wu Qiong
Published: October 2022

Seizing the main contradiction of fast water-bearing rebound in western block III, analyzing the reasons of fast water-bearing rebound in response to the contradiction, meanwhile, by understanding the mechanism of polymer oil drive and combining the development effect of three western injection and gathering blocks, finding out that the main problem of slowing down water-bearing rebound is the establishment of pressure system, and therefore the corresponding management measures at the injection and extraction ends respectively.
Analysis of Enhanced Oil Recovery Technology in Extra-high Water Cut Period in Oilfield
Authors: Lin Dezhang
Published: October 2022

Most onshore oil fields in China are in the later stage of development, and the water content is more than 90%, which increases the difficulty of remaining oil mining. In order to improve the oil production, it is necessary to develop a variety of oil recovery technologies, increase the oil field space pressure, weaken the oil viscosity, and improve the recovery factor. Taking L oilfield as an example, the paper briefly expounds the characteristics of extra-high water cut period, and on this basis, puts forward recovery technology, grasps development rules, and realizes technological innovation. The accumulative oil production reaches 2.32 million tons, and the recovery factor increases by 9%, thus providing reference for related workers.
Exploration and Practice of CO2 Huff-N-Puff Combined CO2 Flooding in Shale Oil Well Cluster Group
Authors: Wang Haifeng , Wang Xiaoyan , Wang Pengtao , Zhang Yang , Wang Wei , Yan Xi , Zhang Nan , Li Jinzhu , Yang Dehua
Published: October 2022

Shale oil production wells in Dagang Oilfield in China are put into production by means of horizontal well and segmented multi-cluster massive volume fracturing. The production characteristics are that the output is high in the initial phase of production, the output decreases rapidly with the continuous production, and there are no effective measures to increase production. There is an urgent need for stimulation technology to improve the recovery of shale reservoir. In the field of oilfield development, CO2 has multiple advantages such as easy injection, viscosity reduction and energy increase. For the shale oil well cluster group with good inter well connectivity, the author designs an implementation mode of “CO2 huff-n-puff combined CO2 flooding” to improve shale oil production. This implementation mode can play the dual role of CO2 huffn- puff combined CO2 flooding and CO2 drive to realize the efficient production increase of shale oil well group. After two phases of implementation of the test well group, the cumulative oil increase of the well group has reached 3864 tons, and the comprehensive oil change rate has reached 1:1.22, which has achieved good stimulation effect. This implementation method can effectively improve the production of shale oil reservoirs and provide a new technical measure for improving production and efficiency of similar shale reservoirs.
Calculation of Energy Storage Cost and Benefit Based on Units-of-production Method
Authors: Yin Shuo , Chen Xing , Chai Zhe , Lu Yao , Guo Xingwu , Jin Man
Published: October 2022

Since 2021, the state has successively issued a series of energy storage development policies. Among them, the guiding opinions on accelerating the development of new energy storage, and the notice on further promoting the participation of new energy storage in the power market and dispatching and utilization have defined the boundaries of the energy storage industry in terms of planning and construction, allocation scale, and income mode. The Henan provincial government issued relevant policies in combination with the actual situation, clarifying the direction for the development of energy storage in the province. In order to analyze the economy of electrochemical energy storage, we use units-of-production method to calculate energy storage cost and benefit.
Research on self-balancing transaction scheduling strategy of new energy power in County considering section load rate
Authors: Lu Yao , Yang Meng , Yin Shuo , Chen Xing , Gu Xiaoxi , Jin Man , Chai Zhe , Guo Xingwu
Published: October 2022

Under the dual carbon target, with the gradual increase of the scale of new energy grid connection, the randomness and volatility of new energy output will further affect the safe and stable operation of the system. In view of the frequent fluctuation of the section load rate of the county external liaison line, this paper proposes a self balancing transaction scheduling strategy of new energy power within the county considering the section load rate, and establishes a day ahead real-time two-tier transaction joint optimization model considering the section load rate. The simulation calculation shows that this strategy can significantly improve the local consumption rate of new energy compared with the simple physical method using only energy storage technology, Reduce the power flow fluctuation of tie line, optimize the section load rate and maintain the stability of power grid.
Analysis and Prospect of Key Technologies for Crop Straw Recycling
Authors: Tuo Jianzhi , Zhao Qingsong , Zhang Wei
Published: October 2022

For the whole process of straw recycling and processing of various general crop harvesters, summarize and analyze the current key technology research in the fields of crop straw recycling and processing technology, foreign matter detection and positioning technology, crop cleaning technology, robot technology, etc., aiming at the efficient recovery of crop straw, the efficient and accurate detection and positioning methods of foreign matters such as stones, soil blocks and metals, the rapid removal of foreign matters. Prospects are made in several key technologies, corresponding technical innovation suggestions are put forward for designers in related fields. It will help to obtain the straw recovery and precise foreign matter detection system that is universal for general agricultural machinery and help the development of efficient and precise agriculture all over the world.
Electrochemical Preparation of Novel Perovskite Solar Cells
Authors: Sun Yiping
Published: October 2022

With the development of human society, the shortage of traditional fossil fuels has intensified, and due to sustainable development and ecological environment, new green and pollution-free energy has entered the public’s field of vision. Thin-film solar cells have high photoelectric conversion efficiency, stable performance and low consumption of raw materials. However, some elements in raw materials are toxic and their reserves are small, which limits their large-scale popularization and use. Perovskite solar cells have attracted public attention because of their low cost and simple production process. The traditional energy content is limited, and the demand for energy is increasing with the development of the world economy, so the world is bound to face the dilemma that single fossil energy cannot meet the demand for energy for economic maintenance and development. As a clean energy, extensive use of solar energy is also an effective solution to the pollution caused by traditional energy utilization. This paper mainly analyzes the electrochemical preparation methods of perovskite solar cells, and studies its performance optimization.