bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparison of the forward and sideways locomotor patterns in children with Cerebral Palsy
Authors: Cappellini Germana , Sylos-Labini Francesca , Avaltroni Priscilla , Dewolf Arthur H. , Assenza Carla , Morelli Daniela , Lacquaniti Francesco , Ivanenko Yury
Published: May 2023

Switching locomotion direction is a common task in daily life, and it has been studied extensively in healthy people. Little is known, however, about the locomotor adjustments involved in changing locomotion direction from forward (FW) to sideways (SW) in children with cerebral palsy (CP). The importance of testing the ability of children with CP in this task lies in the assessment of flexible, adaptable adjustments of locomotion as a function of the environmental context. On the one hand, the ability of a child to cope with novel task requirements may provide prognostic cues as to the chances of modifying the gait adaptively. On the other hand, challenging the child with the novel task may represent a useful rehabilitation tool to improve the locomotor performance. SW is an asymmetrical locomotor task and requires a differential control of right and left limb muscles. Here, we report the results of a cross-sectional study comparing FW and SW in 27 children with CP (17 diplegic, 10 hemiplegic, 2–10 years) and 18 age-matched typically developing (TD) children. We analyzed gait kinematics, joint moments, EMG activity of 12 pairs of bilateral muscles, and muscle modules evaluated by factorization of EMG signals. Task performance in several children with CP differed drastically from that of TD children. Only 2/3 of children with CP met the primary outcome, i.e. they succeeded to step sideways, and they often demonstrated attempts to step forward. They tended to rotate their trunk FW, cross one leg over the other, flex the knee and hip. Moreover, in contrast to TD children, children with CP often exhibited similar motor modules for FW and SW. Overall, the results reflect developmental deficits in the control of gait, bilateral coordination and adjustment of basic motor modules in children with CP. We suggest that the sideways (along with the backward) style of locomotion represents a novel rehabilitation protocol that challenges the child to cope with novel contextual requirements.
Research on the performance of modified blue coke in adsorbing hexavalent chromium
Authors: Wang Hua , Wang Wencheng , Zhang Guotao , Gao Xuchun
Published: May 2023

To solve the issue of hexavalent chromium (Cr(VI)) contamination in water bodies, blue coke powder (LC) was chemically changed using potassium hydroxide to create the modified material (GLC), which was then used to treat a Cr(VI)-containing wastewater solution. The differences between the modified and unmodified blue coke’s adsorption characteristics for Cr(VI) were studied, and the impact of pH, starting solution concentration, and adsorption period on the GLC's adsorption performance was investigated. The adsorption behavior of the GLC was analyzed using isothermal adsorption models, kinetic models, and adsorption thermodynamic analysis. The mechanism of Cr(VI) adsorption by the GLC was investigated using characterization techniques such as Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscope (FE-SEM), X-Ray Diffraction (XRD), and X-Ray Photoelectron Spectroscopy (XPS). With the biggest difference in removal rate at pH = 2, which was 2.42 times that of LC, batch adsorption experiments revealed that, under the same adsorption conditions, the GLC always performed better than LC. With a specific surface area that was three times that of LC and an average pore diameter that was 0.67 times that of LC, GLC had a more porous structure than LC. The alteration significantly increased the number of hydroxyls on the surface of GLC by altering the structural makeup of LC. The ideal pH for removing Cr(VI) was 2, and the ideal GLC adsorbent dosage was 2.0 g/L. Pseudo-second-order kinetic (PSO) model and Redlich-Peterson (RP) model can effectively describe the adsorption behavior of GLC for Cr(VI). Physical and chemical adsorption work together to remove Cr(VI) by GLC in a spontaneous, exothermic, and entropy-increasing process, with oxidation–reduction processes playing a key role. GLC is a potent adsorbent that can be used to remove Cr(VI) from aqueous solutions.
Profiling of adrenal corticosteroids in blood and local tissues of mice during chronic stress
Authors: Vagnerová Karla , Jágr Michal , Mekadim Chahrazed , Ergang Peter , Sechovcová Hana , Vodička Martin , Olša Fliegerová Kateřina , Dvořáček Václav , Mrázek Jakub , Pácha Jiří
Published: May 2023

Stress increases plasma concentrations of corticosteroids, however, their tissue levels are unclear. Using a repeated social defeat paradigm, we examined the impact of chronic stress on tissue levels of corticosterone (CORT), progesterone (PROG), 11-deoxycorticosterone (11DOC) and 11-dehydrocorticosterone (11DHC) and on gut microbiota, which may reshape the stress response. Male BALB/c mice, liquid chromatography-tandem mass spectrometry and 16S RNA gene sequencing were used to screen steroid levels and fecal microbiome, respectively. Stress induced greater increase of CORT in the brain, liver, and kidney than in the colon and lymphoid organs, whereas 11DHC was the highest in the colon, liver and kidney and much lower in the brain and lymphoid organs. The CORT/11DHC ratio in plasma was similar to the brain but much lower in other organs. Stress also altered tissue levels of PROG and 11DOC and the PROG/11DOC ratio was much higher in lymphoid organs that in plasma and other organs. Stress impacted the β- but not the α-diversity of the gut microbiota and LEfSe analysis revealed several biomarkers associated with stress treatment. Our data indicate that social defeat stress modulates gut microbiota diversity and induces tissue-dependent changes in local levels of corticosteroids, which often do not reflect their systemic levels.
Gut-specific telomerase expression counteracts systemic aging in telomerase-deficient zebrafish
Authors: El Maï Mounir , Bird Malia , Allouche Asma , Targen Seniye , Şerifoğlu Naz , Lopes-Bastos Bruno , Guigonis Jean-Marie , Kang Da , Pourcher Thierry , Yue Jia-Xing , Ferreira Miguel Godinho
Published: May 2023

Telomere shortening is a hallmark of aging and is counteracted by telomerase. As in humans, the zebrafish gut is one of the organs with the fastest rate of telomere decline, triggering early tissue dysfunction during normal zebrafish aging and in prematurely aged telomerase mutants. However, whether telomere-dependent aging of an individual organ, the gut, causes systemic aging is unknown. Here we show that tissue-specific telomerase expression in the gut can prevent telomere shortening and rescues premature aging of tert−/−. Induction of telomerase rescues gut senescence and low cell proliferation, while restoring tissue integrity, inflammation and age-dependent microbiota dysbiosis. Averting gut aging causes systemic beneficial impacts, rescuing aging of distant organs such as reproductive and hematopoietic systems. Conclusively, we show that gut-specific telomerase expression extends the lifespan of tert−/− by 40%, while ameliorating natural aging. Our work demonstrates that gut-specific rescue of telomerase expression leading to telomere elongation is sufficient to systemically counteract aging in zebrafish.
The association of prokaryotic antiviral systems and symbiotic phage communities in drinking water microbiomes
Authors: Huang Dan , Yuan Mengting Maggie , Chen Juhong , Zheng Xiaoxuan , Wong Dongsheng , Alvarez Pedro J J , Yu Pingfeng
Published: May 2023

Prokaryotic antiviral systems are important mediators for prokaryote-phage interactions, which have significant implications for the survival of prokaryotic community. However, the prokaryotic antiviral systems under environmental stress are poorly understood, limiting the understanding of microbial adaptability. Here, we systematically investigated the profile of the prokaryotic antiviral systems at the community level and prokaryote-phage interactions in the drinking water microbiome. Chlorine disinfectant was revealed as the main ecological driver for the difference in prokaryotic antiviral systems and prokaryote-phage interactions. Specifically, the prokaryotic antiviral systems in the microbiome exhibited a higher abundance, broader antiviral spectrum, and lower metabolic burden under disinfectant stress. Moreover, significant positive correlations were observed between phage lysogenicity and enrichment of antiviral systems (e.g., Type IIG and IV restriction-modification (RM) systems, and Type II CRISPR-Cas system) in the presence of disinfection, indicating these antiviral systems might be more compatible with lysogenic phages and prophages. Accordingly, there was a stronger prokaryote-phage symbiosis in disinfected microbiome, and the symbiotic phages carried more auxiliary metabolic genes (AMGs) related to prokaryotic adaptability as well as antiviral systems, which might further enhance prokaryote survival in drinking water distribution systems. Overall, this study demonstrates that the prokaryotic antiviral systems had a close association with their symbiotic phages, which provides novel insights into prokaryote-phage interactions and microbial environmental adaptation.
Development of diffusive gradients in thin-films with mixed binding gels for in situ monitoring of artificial sweeteners in waters
Authors: Ijaz Hussain , Zi Jin-Xin , Liu Si-Si , Cai Qi-Si , Cheng Sheng-Ming , Zhao Zong-Xi , Ying Guang-Guo , Sweetman Andy J. , Chen Chang-Er
Published: May 2023

The extensive use of artificial sweeteners (ASs) has raised concerns regarding their presence, fate, and detrimental effects in water resources.
Application of molecular imprinting technology based on new nanomaterials in adsorption and detection of fluoroquinolones
Authors: Hu Gaoshuang , Wu Tianqi , Liu Ziyang , Gao Shan , Hao Jianxiong
Published: May 2023

Application of different nanomaterials in MIT for the adsorption and detection of FQs.
Automated electrolyte formulation and coin cell assembly for high-throughput lithium-ion battery research
Authors: Yik Jackie T. , Zhang Leiting , Sjölund Jens , Hou Xu , Svensson Per H. , Edström Kristina , Berg Erik J.
Published: May 2023

We present ODACell, an automated electrolyte formulation and coin cell assembly system for accelerated battery research.
One-step electrodeposited Ni3S2/Co9S8/NiS composite on Ni foam as high-performance electrode for supercapacitors
Authors: Li Tiansheng , Zhao Zhifeng , Su Zhanhua , Lin Shuangyan , Sun Rui , Shang Yongchen
Published: May 2023

Ni3S2/Co9S8/NiS-7 is prepared by one-step electrodeposition methods, which offers promising supercapacitor performances.
Quantitative Raman microscopy to describe structural organisation in hollow microcrystals built from silicon catecholate and amines
Authors: Volkov Victor V. , Blundell Toby J. , Argent Stephen , Perry Carole C.
Published: May 2023

Molecular and longer-scale organisation of cations and anions in this silica organic framework (SOF) material built from a diamine and hexacoordinated silicon catecholate anion leads to porous crystals.
One-pot domino synthesis of five- and six-membered fused dihydropyridines promoted by PPh3–NBS in aqueous medium
Authors: Banda Bhanu Prasad , Medishetti Nagaraju , Nanubolu Jagadeesh Babu , Atmakur Krishnaiah
Published: May 2023

The synthesis of fused dihydropyridines was accomplished for the first time using PPh3–NBS via a formal [3 + 2 + 1] cycloaddition of 1,3-bisnucleophiles, β-enaminones and aldehydes in aqueous medium.
Compatible and high-efficiency quasi-solid-state integrated photocapacitor based on the synergism of PEDOT/RGO electrode and gel electrolyte to improve the carrier migration
Authors: Qu Yuanduo , Liao Siqi , Wu Liangyi , Wang Junkai , Duan Lianfeng , He Xia , Lu Fushen
Published: May 2023

A novel quasi-solid-state integrated photo-capacitor (IPC) with flexible PEDOT/RGO film as a common electrode will improve carrier migration and the excellent overall conversion efficiency (arrive at 5.8%) of IPC.
Palladium-catalyzed (3 + 2) annulations of 1,3-bis-electrophilic motifs: straightforward synthesis of functionalized pyrrolidines
Authors: Jing Li , Li Zhong-Jun , Li Er-Qing
Published: May 2023

Here we have developed a new 1,3-bis-electrophilic motif, which was applied in palladium-catalyzed (3 + 2) annulation reactions for the construction of functionalized pyrrolidines in good yields.
Recent advances in the asymmetric catalytic construction of oxa-quaternary carbon centers
Authors: He Yu-Ping , Tian Di , Li Xing-Zi , Wu Hua
Published: May 2023

This review focuses on the very recent advances (from 2020 to the beginning of 2023) in enantioselective catalytic reactions for the construction of oxa-quaternary stereocenters.
Arsenic binding to human metallothionein-3
Authors: Yuan Amelia T. , Stillman Martin J.
Published: May 2023

Arsenic poisoning is of great concern due to its neurological toxicity. We report the thermodynamic and kinetic properties of arsenic binding to the human metallochaperone, metallothionein-3, both in an apo state and Zn2+ metalated state.
Experiment-guided molecular simulations define a heterogeneous structural ensemble for the PTPN11 tandem SH2 domains
Authors: Marasco Michelangelo , Kirkpatrick John , Carlomagno Teresa , Hub Jochen S. , Anselmi Massimiliano
Published: May 2023

We have determined the heterogeneous structural ensemble of the tandem SH2 domains of the protein tyrosine phosphatase SHP2 in agreement with experimental data from small-angle X-ray scattering and NMR residual dipolar couplings in solution.
Late-stage peptide labeling with near-infrared fluorogenic nitrobenzodiazoles by manganese-catalyzed C–H activation
Authors: Oyama Tsuyoshi , Mendive-Tapia Lorena , Cowell Verity , Kopp Adelina , Vendrell Marc , Ackermann Lutz
Published: May 2023

This manganese-catalyzed late-stage NBD peptide labeling featured excellent site- and diastereo-E-selectivity, enabling large Stokes shifts, fluorogenic NIR emission, and application for real-time imaging of live bacteria under wash free conditions.
A strategy for modulating the catalytic active center of AP thermal decomposition and its application: La-doped MgCo2O4
Authors: Zhang Guofei , Yu Xin , Wang Zhenlong , Li Sirong , Zhao Zhengyi , Zhu Yunjiong , Wang Yude , Xiao Xuechun
Published: May 2023

La diffuses into the main lattice of MgCo2O4 (Lax-MgCo2O4), exposing more Co3+ active centers: (1) La3+, O2−, high Co3+ concentration, high conductivity promote AP decomposition. (2) The highly active Lax-MgCo2O4 becomes potential catalyst for CSPs.
Understanding the origin of the wide voltage window of microporous carbon electrodes with oxygen-containing defects by modulating surface chemistry
Authors: Zhang Yifeng , Huang Hui , Tian Jie , Ning Xiaowei , Li Chengwei , Fan Zeng , Pan Lujun
Published: May 2023

Benefiting from the specific microporous carbon/electrolyte interface with O-containing defect, the interfacial water molecules in Na+ solvation shell lose HER activity. Thus, the EDL structure has wide operating voltage window.
Regulating charge carrier recombination in Cu2ZnSn(S,Se)4 solar cells via cesium treatment: bulk and interface effects
Authors: Zhao Xiaoyue , Qi Yafang , Zhou Zhengji , Kou Dongxing , Zhou Wenhui , Meng Yuena , Yuan Shengjie , Han Litao , Wu Sixin
Published: May 2023

Cs treatment in a CZTSSe system could enhance device performance by affecting defect characteristics and carrier–transport properties.
Enhanced dielectric performance with high-temperature stability by interface-modulation of the core–shell structured imide-polymer@BT nanohybrids in PEI-based nanocomposites
Authors: Li Jinpeng , Jiang Junhao , Chen Yi , Liu Xiaoyun , Zuo Peiyuan , Cheng Qilin , Zhuang Qixin
Published: May 2023

Imide-polymer@BT-PEI nanohybrids exhibit superior dielectric performance and possess excellent dielectric stability from 20 to 150 °C.
Direct laser patterning of organic semiconductors for high performance OFET-based gas sensors
Authors: Chen Li , Hu Yuzhou , Huang Huaxi , Liu Chao , Wu Di , Xia Jianlong
Published: May 2023

A defocusing femtosecond laser fabrication strategy is demonstrated for the precise patterning of polymeric and molecular OSC films. The patterned films show feature size <2 μm and enhanced gas sensitivity to ammonia analytes.
De novo priming: driver of immunotherapy responses or epiphenomenon?
Authors: Young Alexander L. , Lorimer Tara , Al-Khalidi Sarwah K. , Roberts Edward W.
Published: May 2023

The introduction of immunotherapy, in particular immune checkpoint inhibition, has revolutionised the treatment of a range of tumours; however, only a minority of patients respond to these therapies. Understanding the mechanisms by which different immune checkpoint inhibitors work will be critical for both predicting patients who will respond and to developing rational combination therapies to extend these benefits further. The initiation and maintenance of anti-tumour T cell responses is a complicated process split between both the tumour microenvironment and the tumour draining lymph node. As understanding of this process has increased, it has become apparent that immune checkpoint inhibitors can act both within the tumour and in the draining lymph node and that they can target both already activated T cells as well as stimulating the priming of novel T cell clones. Currently, it seems likely that immune checkpoint inhibition acts both within the tumour and in the tumour draining lymph node both reinvigorating existing clones and driving further de novo priming of novel clones. The relative contributions of these sites and targets may depend on the type of model being used and the timeline of the response. Shorter models emphasise the effect of reinvigoration in the absence of recruitment of new clones but studies spanning longer time periods examining T cell clones in patients demonstrate clonal replacement. Ultimately, further work is needed to determine which of the diverse effects of immune checkpoint inhibitors are the fundamental drivers of anti-tumour responses in patients.
The quest for Magrathea planets
Authors: Ledda Sebastiano , Danielski Camilla , Turrini Diego
Published: May 2023

Context. The formation of planets around binary stars is the subject of ongoing investigations focusing on the early stages of stellar life. The evolution of binaries that become double white dwarfs (DWDs), however, can cause the ejection of high amounts of dust and gas. This material can give rise to circumbinary discs and become the cradle of new planets, yet no studies to date have focused on the formation of circumbinary planets around DWDs. These binaries will be the main sources of gravitational waves (GWs) detectable by the Laser Interferometer Space Antenna (LISA) mission from the European Space Agency (ESA), opening the possibility to detect circumbinary planets around short-period DWDs everywhere in the Milky Way and in the Large Magellanic Cloud via the modulation of their GW signal.

Aims. We investigated the formation process and characteristics (e.g. formation times, masses, and final locations) of Magrathea planets within circumbinary discs around detached DWDs, paying particular attention to the formation of gas giant (GG) planets.

Methods. We simulated multiple planet formation tracks to explore how the planetary formation processes typical of pre-main sequence (pre-MS) discs are affected by the disc environments surrounding DWDs. We investigate the mass and orbital evolution of planetary seeds growing first through pebble accretion, then by gas accretion. Our growth tracks account for both the disc accretion rate onto the central binary and the disc photoevaporation rate caused by stellar irradiation.

Results. We present both planetary formation tracks taking place in steady-state discs, and formation tracks taking place in discs evolving as a function of time. Our simulations show that planetary formation should be common in circumbinary discs around DWDs, but the formation of GG planets can be hindered by the temperatures of the disc and the rapid disc depletion.

Conclusions. Our results show that planetary formation in circumbinary discs around DWDs can be possible. In particular, the extreme planetary formation environment implies three significant results: (i) the accretion rate and the metallicity of the disc should be high in order to form sub-stellar objects with masses up to ~31 MJ, this is achieved only if planet formation starts soon after the onset of the disc and if first-generation seeds are present in the disc; (ii) seeds formed within 0.1 Myr, or within 1 Myr, of the onset of the disc can only produce sub-Neptunian (SN) planets and Neptunian (N) planets, unless the disc accommodates first-generation seeds with mass 10 M⊕; (iii) most of the planets are finally located within 1 au of the disc centre, while they are still undergoing the gas accretion phase.
Study on the Current Situation and Utilization of Titanium Ore Resources in Yunnan
Authors: Huang Shihong , Long XianHao , Cui Yan , Zhang Liang
Published: May 2023

In view of the development and utilization of the titanium industry in Yunnan Province, the paper expounds the current situation and utilization of titanium resources in Yunnan Province, introduces the main mineralization and main element analysis results in central, southern and western Yunnan, and introduces the current development situation of titanium resources in Yunnan Province and puts forward suggestions. Yunnan Province is rich in titanium placer resources, with excellent beneficiation and processing performance and low mining and dressing costs. The construction of a full set of production lines for titanium industry can achieve the goal of making full use of the advantages of titanium resources in Yunnan Province.
The Planning Method of Township Regional Low-carbon Energy System Based on Demand Side Response
Authors: Ge Antong , Jia Lei , Xu Chen , Hu Wenyuan , Wan Tong
Published: May 2023

To solve the problem of environmental pollution caused by rising energy demand and explore the impact of demand-side resources on system optimal scheduling, based on the EH model, it is of great significance to study the integrated demand response strategy, carbon trading mechanism and low-carbon energy uncertainty for the operation of IES low-carbon economy. Compared with the traditional load response model, this model has better flexibility with the adjustment response. According to the thermal inertia and certain time delay characteristics of the heat load, the demand response model of heat load is established. Then, according to the application of the multienergy price demand response theory in natural gas system, the optimization model of gas load response is constructed. Three different optimization scenarios are set for simulation and comparative analysis, which verifies that the township comprehensive demand response model considering electric and thermal gas load has a significant effect on improving the system economy and the absorption capacity of low-carbon energy.
Energy budget targeting index model based on energy consumption dual control
Authors: Xu Weifeng , Yu Bin , Ni Yili , Weng Liguo
Published: May 2023

Aiming at the problems that it is difficult to avoid “one size fits all” when carrying out the dual control of energy consumption in local areas, the lack of clear rules and effective tools to support the dual control of energy consumption, and the asynchronous control of total energy consumption and intensity, a dual control of energy consumption targeting index model is proposed. According to the level of energy efficiency, different industries and enterprises are finely distinguished, and one industry, one index and one enterprise, one accounting are implemented. The priority of energy use is tilted to industries and enterprises with high energy efficiency levels, so that energy consumption is distributed more scientifically and reasonably among industries and enterprises within the industry, and the energy consumption structure of the whole region is optimized and reshaped.
Distributed energy storage operation optimization model considering demand response
Authors: Guo Yuhan , Tang Ren , Li Changqing , Wang Jintao , Wang Ziji
Published: May 2023

With the rapid development of new energy, wind power, photovoltaic, geothermal and other energy sources are connected to the power grid on a large scale, showing the characteristics of system stability and reliability, complex safety characteristics, imbalance between supply and demand, and insufficient peak shaving capacity. As a flexible demand response resource, distributed energy storage can effectively promote the coordinated and stable operation of power supply and demand resources. Considering the economy and technology of distributed aggregators, an operation optimization model for their participation in demand response is constructed, and a distributed energy storage operation control strategy considering demand response is proposed, which can effectively realize peak load shifting.
Projection on China’s Automobile Stock and Traffic Carbon Emissions
Authors: Liu Bin , Ma Naifeng , Liu Kexin , Shi Hong
Published: May 2023

As a means of transportation, automobiles produce large carbon emissions. On the basis of analyzing the carbon emissions of automobile transportation in 2021, the ownership model, new car sales structure model and carbon emissions analysis model are constructed, and the carbon emissions of automobiles under the baseline scenario and dual carbon scenario in 2022-2060 are predicted. For dual carbon, the main technology path of automobile can be divided into four parts: popularizing new energy vehicles, energy-saving fuel vehicles, green transportation and zero-carbon fuels.
Reserve Demand Determination Method Considering the Different Time Periods Uncertainty of Wind and Solar
Authors: Hao Siyu , Ren Xianglin , Chen Zhe , Song BingBing , Chen Xinyi , Teng Xiaobi
Published: May 2023

With the gradual realization of China’s 14th Five-Year Plan, the proportion of installed renewable energy capacity in all regions has increased significantly. The access of a high proportion of renewable energy has brought serious challenges to the safe and stable operation of the power system. The uncertainty of wind power and photovoltaic output makes it difficult for the traditional reserve demand determination method to economically and effectively calculate the reserve capacity required by the system, so it is urgent to propose a reasonable reserve capacity demand determination method. On the one hand, it ensures that the deserve capacity needed by the system is sufficient to cope with real-time active fluctuations, and on the other hand, it improves the economy of the reserve capacity. The reserve demand determination method considering the different time periods uncertainty of wind and solar in this paper is able to meet the reserve demand of new power system. At last, the article proves the benefits of Reserve Demand Determination Method through a numerical example.
Design of Ground Pressure Safety Monitoring System Based on SaaS
Authors: Ji Hu , Dai Rui
Published: May 2023

Sudden ground pressure disasters caused by deep mining such as rock burst and cave-in are major hidden dangers affecting safety production underground mine. The safe and stable operation of ground pressure safety monitoring platform is of great significance for mine safety production. However, many small and medium-sized mining enterprises make slow progress in the construction of the online monitoring platform for ground pressure safety due to the limitations of enterprise scale, capital capacity and other factors. With the development of The Times, SaaS model (software as a service model) develops rapidly with the advantages of Internet, multiple leasing, service and scalability. Through SaaS model, it effectively solves the problem of building a low-cost and high-reliability online ground pressure monitoring platform for Chinese small and medium-sized mining enterprises.
Research on the data collection standardization system of capacity construction report in changqing oilfield
Authors: Jiao Yang , Mei Qi-liang , Li Lin , Deng Hong-mei
Published: May 2023

The capacity construction project group of Changqing oilfield needs to repeatedly enter the same data into multiple different information systems of the company every day. This work mode causes many problems, such as multiple entries, heavy repetitive workload, and difficult to guarantee data quality. Through in-depth analysis of business process and data entry status of the capacity construction project group, this paper puts forward the working ideas of data collection link standardization and data collection standard standardization, explores and establishes a standardized data collection system for the whole chain of capacity construction report data, including investment plan, well information entry, investment allocation, predrilling, drilling, well log, logging, oil testing (gas testing), production and injection, and well delivery. The system guarantees the timeliness, integrity and accuracy of data. In addition, it provides an external data sharing service, build the capacity construction data sharing platform, and realize the “one-time data entry, multiple system reuse, automatic report generation” of capacity construction report data.
Analysis and research on the impact of carbon market on the clearing price of coal-fired power units
Authors: Qiao Ning , Zhang Chao , Zhang Jisheng , Chen Haidong , Zhang Jing , Tian Hongjie
Published: May 2023

The coal power industry accounts for the largest proportion of carbon dioxide emissions, and is first included in the national carbon market, while the cost of carbon emissions has a certain impact on the coal power clearing price. Based on this, this paper constructs a bidding model of coal-fired power units considering the cost of carbon emissions; Taking Guangdong Province as an example, this paper simulates the change of the clearing price of the spot market of coal power units in the light, medium and heavy carbon market scenarios, and provides relevant suggestions for the construction of the electricity market and carbon market.
Numerical simulation of the influence of different oxygen concentration on the combustion characteristics of double tangential boiler at low load
Authors: Wang Legan , Jin Baosheng , Chen Xi
Published: May 2023

In order to cope with the demand for deep peak regulation of high-parameter coal-fired units, this paper uses numerical simulation methods to systematically explore the influence of different secondary wind oxygen enrichment concentrations on the combustion performance and characteristics of singlefurnace double-cut round boilers during low-load operation, so as to provide theoretical support for the actual operation of power plants. The results are as follows: (1) The use of oxygen enriched secondary air combustion during low-load operation of the boiler can improve the overall temperature of the main combustion zone of the furnace and the local temperature of the burner nozzle section, and enhance the combustion stability of pulverized coal in the furnace. (2) When the secondary air oxygen concentration is 35% and 40%, the overall temperature of the main combustion area of the boiler increases the most obviously, and the combustion is the most stable. (3) Oxygen-enriched combustion effectively reduced the NOx emission concentration in the furnace, and the overall trend of NOx emission decreases first and then increases with the increasing trend of secondary air oxygen concentration.
Hierarchical 2D/2D C-ZnIn2S4/O-PCN S-Scheme Heterojunction for Enhanced Photocatalytic Hydrogen Production
Authors: Zhang Ping , Wang Lei , Li Fangzhou , Liu Yuan , Wu Lijun
Published: May 2023

The heat agglomeration, inadequate optical absorption, significant electron-hole recombination are the main reasons resulting to the low photocatalytic activity of carbon nitride. Herein, based on O-defective functionalized carbon nitride, the C atoms are designed to insert into ZIS lattice to broaden light adsorption intensity and range to near-infrared light (NIR), then are adopted to construct a 2D/2D heterojunction of hierarchical C-ZnIn2S4/O-PCN nanoflower to enhance the photocatalytic hydrogen evolution of carbon nitride from water splitting. The successful incorporation of C atoms can be revealed by the elemental analysis, enhanced N2 adsorption, and deformation of crystal lattice in C-ZIS. A distinct curve edge of amorphous O-PCN and crystalline C-ZIS, confirm the formation of C-ZIS/O-PCN heterostructures. The optimal matchability is achieved as the mass ratio of C-ZIS to O-PCN is 1:1, which corresponds to the highest photocatalytic hydrogen evolution rate of 1274.8 μmol/g/h, 16.7 times higher than O-PCN. This enhancement is responsible for the largest 2D/2D surface contact, broadened optical adsorption intensity and range, rapid charge transfer at the interface, and the formation of S-Scheme route in the 50%C-ZIS/O-PCN heterojunction.
Advances in research of Anammox process in MBR
Authors: xinyu Zhou , yuhang Yuan , zhian Huang , yongbin Lin , zejiang Li , Dongkun
Published: May 2023

Membrane bioreactor (MBR) is an efficient wastewater treatment technology, which is produced by combining membrane treatment technology and biological treatment technology, and has the characteristics of stable water quality and shock load resistance, and has been widely used in domestic wastewater treatment. Anaerobic ammonia oxidation (ANAMMOX) is a new type of biological denitrification technology with the advantages of low energy consumption, low oxygen demand, carbon source saving and good economic benefits. This paper introduces the principle and characteristics of the MBR nitrification-anaerobic ammonia oxidation reactor process analysis process. Prospects of anaerobic ammonia oxidation technology in MBR are foreseen.
Study of simultaneous adsorption of ammonium and phosphate in waters by La-F4A zeolites prepared from spent FCC catalyst
Authors: Liu Chang , Qiu Zhaofu , Shan Zhaoyang , Yan Zhen
Published: May 2023

The problem of resource disposal of massive spent fluid catalytic catalyst needs to be solved urgently. Thus an environmentally friendly, highly efficient and economical cost adsorbent used for nitrogen and phosphorus removal was prepared from spent fluid catalytic catalyst. A novel 4A zeolite adsorbent loaded with lanthanum hydroxide (La-F4A) was prepared by acid leaching pretreatment, alkali fusion roasting hydrothermal and co-precipitation method. And use La-F4A in the study of simultaneous adsorption of ammonia-nitrogen and phosphorus in water. Adsorption experiments were carried out under the condition that the primordial concentrations of PO4 and NH4+-N were respectively 1 & 10mg/L. La-F4A has an adaptive adsorption ability on NH4+-N and PO4 in the pH range of 4-9. When the temperature is 298K, the dosage is 1.0 g/L, the contact time is 240 min, and test water pH=7, the maximum adsorption capacities for NH4+-N and PO4 are 7.64 mg/g and 0.93 mg/g respectively. The behaviours accord with the pseudo-second-order adsorption kinetic model. The adsorption of PO4 conforms to the Langmuir isotherm model while NH4+-N conforms to the Freundlich isotherm model. Coexisting anions have almost no effect on the adsorption of PO4, coexisting cations have different inhibitory effects on the adsorption of NH4+-N. After four desorption cycles, the removal efficiency of La-F4A for NH4+-N and PO4 was 77% and 93% of the initial capacity. There are both chemical adsorption and physical adsorption in the process. The ammonium removal mechanism is the ion exchange between NH4+ and Na+ in the framework, and the phosphate removal mechanism is the ligand exchange between PO4 and hydroxyl to form LaPO4. La-F4A is regarded to be an excellent adsorbent for ammonium and phosphate removal.
Evaluation of safety monitoring scheme for offshore floating platform based on the multiple connection numbers
Authors: Liu Guo , Guo Qiyue , Bai Yanqiang
Published: May 2023

To accurately evaluate the safety monitoring scheme of offshore floating platform, a five-element connection number analysis method for evaluating the safety monitoring scheme of offshore floating platform was developed in this paper. According to the characteristics of safety monitoring of offshore floating platform, an index system was constructed. Considering the complexity and uncertainty in the evaluation of safety monitoring schemes, the Set Pair Analysis based on the five-element connection number was used to establish the similarity, difference and reverse evaluation model of safety monitoring schemes for offshore floating platforms. In addition, entropy weight method was employed to calculate the objective weights. Taking an offshore floating platform project in Guangdong, China as an example, a case study was carried out. The study showed that the evaluation grade of this monitoring program was good and the scientificity of the programming method is the most important influencing factor. The research results provided a theoretical basis for the safety monitoring scheme management of offshore floating platform.
Research progress in the application of vegetable dyes
Authors: Zhou Wei , Zhang Huanhuan , Huang Yijing , Zhou Zhaoyi
Published: May 2023

Vegetable dyes have been paid more and more attention because of their innocuity and good compatibility with the environment, but they can not completely replace chemical synthetic dyes. In this paper, the classification, identification method, application and existing problems of vegetable dyes are described, which can be used for reference in the further development of vegetable dyes.
Experimental Study on the Dressing and Smelting of a Pyrrhotite-bearing Primary Gold Ore
Authors: Chen Yanbo , Wang Junjie
Published: May 2023

The content of pyrrhotite in a primary gold mine containing pyrrhotite is 0.68%. In the process of alkaline leaching pretreatment, there are problems such as large ore quantity and high alkali consumption. In the process of cyanide leaching, there are problems such as high cyanide consumption and slow gold leaching rate. In order to solve these problems, combined with production practice, experimental studies on magnetic separation, magnetic separation tailings leaching, magnetic separation concentrate alkali leaching pretreatment - leaching, magnetic separation concentrate flotation - cyanide leaching, etc. were carried out. A new process of "magnetic separation-magnetic flotation flotation flotation flotation flotation alkali leaching pretreatment mixed cyanide leaching" has been developed to reduce the pretreated minerals to less than 2% of the original ore, which is higher than the gold leaching rate of the conventional "alkali leaching pretreatment cyanide leaching" process, and the alkali (sodium hydroxide) consumption and cyanide (sodium cyanide) consumption are reduced by 80.83% and 32% respectively, and the annual reagent cost is saved by more than 600000 yuan.
Research on dynamic behavior vibration control of semi-submersible Marine platform based on ARID control system
Authors: Luo Chengbo
Published: May 2023

As the development and infrastructure of deepwater oil and gas resources, the performance of the deepwater offshore platform is directly related to personnel safety, equipment safety, normal production and drilling process. Therefore, hydrodynamic calculation[1] and flow response-based control and optimization are current hot research topics. Semi-submersible marine platforms are widely used in the industry due to their large deck area, strong wind and wave resistance, and excellent mining ability. However, their complex and diverse lines in the marine environment result in a series of dynamic responses due to wave loads, particularly in the rotating dynamic behavior, which cannot be efficiently controlled using traditional vibration control methods.Many research studies have focused on developing efficient control systems to suppress the dynamic behavior of semi-submersible marine platforms. For instance, active mass dampers (AMD) and tuning rotational inertia dampers (TRID) devices have been used to control the translation dynamic behavior of the platform. However, their performance in controlling the rotating dynamic behavior of the platform is unsatisfactory.To address this challenge, this paper proposes a new type of active control system called the Active Rotary Inertia Driver (ARID), which utilizes an active torque control system to suppress the rotating dynamic behavior of the semi-submersible marine platform. The ARID system is developed based on AMD and TRID devices and aims to enhance personnel and equipment safety, as well as the normal production and drilling process of the platform.Therefore, this study presents a comprehensive review of the research status on hydrodynamic calculation and flow response-based control and optimization of deepwater offshore platforms, particularly the semi-submersible marine platform. The proposed ARID system is expected to contribute to this research area by offering an efficient solution to the rotating dynamic behavior of the platform.
Research and Design of Ecological Restoration Machinery for Rock Desertification--Multifunctional Mountain Seeder
Authors: Shen Zedong
Published: May 2023

A grassland carbon sink is a grassland planting activity with special requirements to implement carbon sink measurement and monitoring of the growth process of forage grasses on the land where the baseline has been determined, with the main purpose of increasing carbon sink. The development of grassland carbon sink is extremely beneficial to achieve the two important deployments of carbon peaking and carbon neutrality. Grasslands with one-fourth area in the south are limited by the rugged topography of the karst landscape and thin soil layer, and the efficiency of pasture planting is low. For the above problems, our team proposes a design around mountain pasture cultivation to reduce carbon emissions and apply it to increase carbon sinks in grasslands of stone desertification areas. The design can provide a concrete solution for restoring the ecological environment and enhancing the carbon sink capacity of grassland in stone desertification areas, and also provide a technical guarantee for local herders to increase their income and productivity. This work has the advantages of high market potential, low cost, composite multi-functional automatic operation, and high planting efficiency with a small size, which has good promotion value. It effectively reduces carbon emissions while improving vegetation cover and establishes a new model of combining green restoration and agricultural production in mountainous areas.
Optimal Design of Cryogenic Insulation System for Large Liquefied Natural Gas (LNG) Storage Tanks Based on Operation Factors
Authors: Fan Yang , Bochao Zhang , Yuqi Zhang
Published: May 2023

Liquefied natural gas (LNG), as a recognized clean energy, has seen a rapid increase in global consumption in recent years. As the core equipment of the LNG receiving terminal, the large LNG storage tanks, its’ cryogenic insulation system design is particularly important. The insulation system is mainly used to maximize the control of the daily evaporation of cold storage tanks, so as to achieve long-term storage of LNG in the tank. Its design is particularly important. At present, the internal design of the industry often only considers the construction conditions, without comprehensive consideration of operation, maintenance and other full-life cycle conditions. This paper analyzes and optimizes the design of the insulation system of large LNG storage tanks from the aspects of the performance of the insulation material itself, the construction period, pre-cooling start-up, operation and maintenance and other comprehensive operating factors. And taking the 30,000 m3 LNG storage tanks as an example, through the analysis and comparison of some columns, obtained the optimal daily evaporation rate requirements of the insulation system, which can be used as a reference for the design of LNG projects during the construction period.
Research on integrity Management of long distance pipeline
Authors: Fan Ye , Feng Xiao-xing
Published: May 2023

Long-distance pipelines transport and distribute vast amounts of oil and natural gas around the world every day. It is considered the safest way to transport oil and gas because it rarely breaks down. The integrity management of long distance pipeline is very important for pipeline transportation. Based on the main content of integrity management of long distance pipeline and the basic requirements for operators, this paper puts forward the main responsibilities and management principles of integrity management of long distance pipeline. At last, according to the characteristics of Chinese long-distance pipeline, the integrity management of the whole pipeline is regulated, which is an important reference for the late safety maintenance of Chinese long-distance pipeline.
Numerical simulation study of the effect of anodic bubble behavior in aluminum electrolysis cell
Authors: Zhou Peixin , Tie Jun , Qiu Xiaowen , Wang Xiaoyu , Li Wanlin
Published: May 2023

During the aluminum electrolysis process aluminum is produced at the cathode and CO2 gas bubbles are generated on the anode and released. The bubbles reduce the active surface area of the anode, which increases energy consumption. They also cause the liquid aluminum to fluctuate and oxidize again. The study of anodic bubble behavior is important to reduce power consumption and improve current efficiency. In this paper, the phase field, laminar flow and tertiary current distribution modules in COMSOL Multiphysics are applied to simulate the growth and motion patterns of anodic bubble in the electrolytic cell to visualize and analyze the behavior of anode bubble.
In-situ heavy oil upgrading by high temperature oxidation through air injection
Authors: Tang Xiaodong , Pu Wanfen , Yang Yu , Liu Renbao
Published: May 2023

Air injection has been widely considered as a technology to enhanced heavy oil recovery on account of the heavy oil upgrading caused by high temperature oxidation during this process. This paper aims at exploring the effects of oxidation thermal processing in a porous media at high temperature from 500 to 540℃ which is the high temperature oxidation range of heavy oil known from TG results, and reaction time from 8 to 16 hours for heavy oil upgrading. It was suggested that the viscosity decreased with the temperature and retention time increased due to getting less ring structure seen from IR Spectrum results. It was observed that the viscosity of heavy oil was reduced 1 to 2 orders of magnitude. Besides, the kinetics of heavy oil upgrading were analysed using five pseudo components including HO (C35+), MO (C15 ~ C35), LO (C5 ~ C14), coke, G (gas products) and successfully predicted the products results with an error of 4.34%, and great correlation to Arrhenius equation. The activation energies obtained are in the range of 44 ~ 215 kJ/mol. This work has great value in revealing the mechanisms of high temperature oxidation heavy oil upgrading and assisting heavy oil production.