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A study of integrated pest management models with instantaneous and non-instantaneous impulse effects

Mathematical Biosciences and Engineering 2024年第2期21卷 3063-3094页

作者： Wu, Liping Xiang, Zhongyi School of Mathematics and Statistics Hubei Minzu University Hubei Enshi445000 China Hubei Key Laboratory of Biologic Resources Protection and Utilization Hubei Minzu University Hubei Enshi445000 China

The occurrence of pests and diseases during agricultural production affects the quality and quantity of agricultural products. It is important to evaluate the impact of various factors on pests to achieve optimal results of integrated pest management (IPM) during its implementation. In this paper, we considered the transient and non-transient effects of chemical control on pests and the effects on natural enemies at different times, and developed a corresponding pest control model. Detailed studies and comparisons were conducted for spraying pesticides either more or less frequently as compared to strategies for releasing natural enemies. The threshold conditions for global asymptotic stabilization of the pest extinction period solution was obtained. Using two-parameter and sensitivity analysis techniques, the parameters affecting the variation of the threshold were discussed. By comparing these two pest control strategies, we found the existence of optimal application and release frequencies. Finally, in order to control pests below the economic threshold level, the state-dependent pest model was numerically investigated. The results show that the presence or absence of chemical control of pests can depend on the values taken for the parameters in the model. Based on this information, pest control experts can make decisions about the best spraying time and the best release rate. © 2024 American Institute of Mathematical Sciences. All rights reserved.

关键词： Sensitivity analysis

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Novel process for facile preparation of mesoporous silica-based materials with controllable pore structure from coal fly ash Author links open overlay panel

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Particuology 2024年第8期91卷 128-137页

作者： Jian-ming Gao Zhen Li Shujia Ma Yuanyuan Zhang Fangqin Cheng Institute of Resources and Environment Engineering State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste ResourcesShanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related WastesShanxi UniversityTaiyuan 030006China

Extraction of silica from fly ash to produce mesoporous silica materials is one of the most important utilization *** silica could not be synthesized on a large-scale by conventional sol-gel *** this paper,facile preparation of mesoporous silica with controllable pore structure from fly ash by the template-free process via two steps of mineral phase transformation and selective acid etching was *** influence of crystalline structure and acid etching degree on structure of as-synthesized mesoporous silica materials was revealed,as well as mechanism of crystalline structure transformation and pore structure *** results show that mullite and quartz could be transformed into acid-soluble kaliophilite when fly ash reacted with K_(2)CO_(3)at temperature of 800-1100℃.The hexagonal kaliophilite would be transformed into orthorhombic KAlSiO_(4)-O1 phase when the temperature is controlled at 1100℃.Mesoporous silica with specific surface area of 475.93 m^(2)/g and 642.57 m^(2)/g could be synthesized from activated fly ash with kaliophilite and KAlSiO_(4)-O1 phase crystalline *** controlling the degree of acid etching,mesoporous silica materials with different pore structures can be *** paper provides a cost-effective and large-scale process for the preparation of mesoporous silica materials with controllable pore structure from solid waste fly ash.

关键词： Fly ash Mesoporous silica Crystal transformation Acid etching Controllable pore structure

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Classification and progress of extraction technologies for nonferrous metal resources

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Science China Chemistry 2025年第2期68卷 458-474页

作者： Fangqin Cheng Na Zhou Nazeer Muhammad Nouman Li Cui Caixia Yin Institute of Resources and Environmental Engineering State Environmental Protection Key Laboratory of Efficient Utilization of Coal Waste ResourcesShanxi UniversityTaiyuan 030006China Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education Institute of Molecular ScienceShanxi UniversityTaiyuan 030006China

In recent years,the demand for strategic metal resources,essential for scientific and technological progress and industrial development,has *** a stable supply of these metals is critical to national security and the well-being of the *** global industrialization accelerates,the daily demand for nonferrous metals continues to ***,extracting and recovering strategic metals from low-grade raw materials,such as solid waste,has become crucial for maintaining their supply and economic ***,the extraction process is fraught with challenges,including mineral phase stability and complex *** review focuses on key strategic metals such as lithium,aluminum,gallium,and *** introduces and examines various methods for extracting nonferrous metals from different raw materials,including traditional mining technologies applied to low-grade solid *** also outlines future development opportunities and challenges in this field.

关键词： nonferrous metal extraction classification and progress

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Photocatalytic Degradation of Congo Red Using an S-scheme Heterojunction Photocatalyst Based on Bismuth Compounds

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Journal of Wuhan University of Technology(Materials Science) 2025年第3期40卷 644-649页

作者： JIA Yunfei TAN Haiyan YUAN Hong CHENG Xinhua SHI Xinyu Hubei Key Laboratory of Biologic Resources Protection and Utilization School of Chemistry and Environmental EngineeringHubei Minzu UniversityEnshi 445000China Hubei Key Laboratory of Selenium Resources Research and Biological Applications Institute of Selenium Science and IndustryHubei Minzu UniversityEnshi 445000China National Demonstration Center for Experimental Chemis-try Education(Central China Normal University) College of ChemistryCentral China Normal UniversityWuhan 430079China

A BiOI/BiOBr S-scheme heterojunction photocatalyst was synthesized using a solvothermal method,and its ability to degrade Congo red was thoroughly *** photocatalytic performance of the BiOI/BiOBr heterojunction was compared with that of pure BiOBr and *** structural,morphological,optical,and electrical properties of the samples were characterized using X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM),UV-vis diffuse reflectance spectroscopy(UV-vis DRS),and zeta potential *** degradation rate of Congo red was determined by spectrophotometry,revealing that the BiOI/BiOBr S-scheme heterojunction exhibited excellent photocatalytic performance,achieving a degradation rate of 96.8%for a 50 mg/L Congo red solution within 75 *** rate was significantly higher than those achieved by pure BiOBr(77.2%)and BiOI(83.1%).Theoretical calculations indicate that the S-scheme heterojunction effectively facilitates the separation of photogenerated charge carriers while preserving the strong redox ability of the *** characteristics are identified as the key factors underlying the superior photocatalytic degradation efficiency of the BiOI/BiOBr S-scheme heterostructure.

关键词： heterojunction congo red azo dye photocatalytic degradation charge transfer

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NO reduction performance of pyrolyzed biomass char:Effects of dechlorination removal pretreatments

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Chinese Journal of Chemical Engineering 2025年第4期80卷 119-129页

作者： Jing Wang Xinwei Yang Ruiping Zhang Fengling Yang Frederic Marias Fei Wang State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources Institute of Resources and Environment EngineeringShanxi UniversityTaiyuan 030006China Laboratory of Thermal Engineering Energy and ProcessesUniversity of Pau and Pays de l'AdourPauBP 576-64012France

In the current era of renewable energy prominence,the wide operational capacity of coal-fired boilers has emerged as crucial for ensuring the sustainability of power ***,attaining ultra-low nitrogen oxides(NO_x)emissions during periods of low-load operations presents a significant and persistent challenge for coal power *** techniques such as biomass re-burning and advanced re-burning have shown promise in enhancing NO reduction effciency above 800℃,their elevated levels of chlorine(Cl)and alkali metals pose potential risks to boiler equipment ***,this study proposes the utilization of biomass char derived from pyrolysis as a dual-purpose solution to enhance NO reduction efficiency while safeguarding boiler integrity during low-load *** indicate that pyrolysis treatment effectively reduces the Cl and alkali metal content of ***,it was determined that biomass char produced through deeply pyrolysis at 300℃achieves the highest NO reduction efficiency while minimizing the presence of harmful *** a reduction temperature of 700℃,both re-burning and advanced re-burning techniques exhibit NO reduction efficiencies of 55.90%and 62.22%,which is already an ideal deficiency at low *** addition of water vapor at 700-800℃obviously avoids the oxidation of ammonia to NO in advanced *** further analysis,denitrification efficiency in biomass char re-burning and advanced reburning is influenced not only by volatile content but also by physicochemical properties such as porosity and surface functional group distribution under certain reaction *** study provides a theoretical framework for the industrial implementation of biomass char for NO control in coal-fired power plants,offering insights into optimizing NO reduction efficiency while mitigating potential risks to boiler equipment.

关键词： Biomass char Pyrolysis conditions Dechlorination Biomass re-burning Biomass advanced re-burning NO heterogeneous reduction

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Fusion of Ascending and Descending Lutan-1 for Building Extraction in decision level 2

Fusion of Ascending and Descending Lutan-1 for Building Extr...

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2nd IEEE International Conference on Signal, Information and Data Processing, ICSIDP 2024

作者： Cheng, Ji Jiang, Mengke Ge, Jie Lei, Yu Deng, Li Key Laboratory of Investigation Monitoring Protection and Utilization for Cultivated Land Resources Chengdu610045 China

ISBN: (纸本)9798331515669

Recent years, SAR has been widely utilized in building extraction for it can provide rich spatial information and cannot be influenced by weather. However, most researchers only use one single orbit of SAR, which can be significantly affected by SAR shadow and layover. Using both ascending and descending SAR can effectively resolve this problem for they contain complementary information from opposite site. Meanwhile, the fusion method is important for the extraction. Therefore, in this manuscript, we proposed a novel method for applying both ascending and descending SAR in decision level. Lutan-1 is utilized for its high resolution and stability. We reached the precision as 92.87%, while that for only use ascending and descending SAR are 86.20% and 83.45% respectively. This result indicates that our proposed method can effectively extract buildings and shows the opportunities of Lutan-1 in more fields. © 2024 IEEE.

关键词： Jurassic

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Adhesion between nanobubbles and fine cassiterite particles

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International Journal of Mining Science and Technology 2023年第4期33卷 503-509页

作者： Liuyi Ren Zheyi Zhang Weineng Zeng Yimin Zhang School of Resources and Environmental Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Mineral Resources Processing and Environment Wuhan 430070China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and TechnologyWuhan 430081China Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources Wuhan 430081China

Adhesion is an important process of particle-bubble interaction in fine particle(-10μm)*** paper studied the adhesion process and mechanism between nanobubbles and fine cassiterite particles by using a high-speed camera,atomic force microscope(AFM),adsorption capacity tests,and induction time *** being pretreated with nanobubbles(NBs)water,fine cassiterite particles flotation tests were carried out using caprylhydroxamic acid(CHA)as a *** results showed that NBs can improve the recovery and flotation rate of fine cassiterite while decreasing the collector *** adsorption capacity test indicated that the cassiterite treated with NBs had lower demand for collector *** AFM imaging results further demonstrate that NBs could reduce the adsorption of CHA on the surface of *** NBs played a part of the role of collector,it can improve the flotation effect while reducing the amount of *** induction time test and the high-speed camera observation test showed that NBs promoted the attachment between bubbles and cassiterite *** the other hand,NBs agglomerate cassiterite particles,increasing the probability of particles colliding with bubbles.

关键词： Nanobubbles Cassiterite Flotation Caprylhydroxamic acid

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Bacterial-mediated recovery of copper from low-grade copper sulfide using fly ash and bacterial community dynamics

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International Journal of Minerals,Metallurgy and Materials 2025年第5期32卷 1044-1055页

作者： Wei Chen Ming Zhang Shenghua Yin Yun Zhou Key Laboratory of Ministry of Education for High-Efficient Mining and Safety of Metal University of Science and Technology BeijingBeijing 100083China School of Resources and Safety Engineering University of Science and Technology BeijingBeijing 100083China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and TechnologyWuhan 430081China

Bioleaching is confronted with problems,such as low efficiency,long production cycle length,and vegetation *** order to solve problems above,fly ash and low-grade copper sulfide ores were used to investigate bioleaching behaviors and bacterial community *** showed that copper recovery,bacterial concentration,total proportion of main leaching bacteria including Acidithiobacillus ferrooxidans,Acidibacillus ferrooxidans,and Leptospirillum ferriphilum,were improved through using appropriate dosage of fly *** maximum copper recovery of 79.87%and bacterial concentration of 7.08×10^(7)cells·mL^(-1)were obtained after us-ing 0.8 g·L^(-1)fly *** precipitation including Zn(Fe_(3)(SO_(4))_(2)(OH)_(6))_(2)and Mg(Fe_(3)(SO_(4))_(2)(OH)_(6))_(2)was found in sample added 0.8 g·L^(-1)fly ash,which reduced the effect of hazardous ions on bacteria and thus contributing to bacterial *** com-munity structure was differentiated,which indicated difference between original inoculation and sample used 0.8 g·L^(-1)fly ash was less than *** proportion of the three microorganism above accounted for more than 95%in all tests,especially in sample with 0.8 g·L^(-1)fly ash up to 99.81%.Cl^(-)and Ag^(+)contained in fly ash can act as catalytic agent,which contributed to conversion from smooth and dense passivation layer to sparse and scattered one,and therefore improving contact between ores,lixiviant,and *** appropri-ate dosage of fly ash showed prospects in bioleaching.

关键词： low-grade copper sulfides fly ash bioleaching behavior bacterial community succession

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A network meta-analysis on responses of forest soil carbon concentration to interventions

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Ecological Processes 2024年第3期13卷 1-10页

作者： Kaihui Shen Lin Li Shiguang Wei Jiarun Liu Yi Zhao School of Life&Environmental Sciences Guilin University of Electronic TechnologyGuilin 541004China Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection Ministry of Education-Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River BasinGuangxi Normal UniversityGuilin 541004China

Background Forests play a crucial role in absorbing CO_(2) from the atmosphere.55%of the carbon in terrestrial ecosystems is stored in forests,with the majority of forest carbon stored in *** better understand soil organic carbon(SOC)of forests and to access interventions that afect their SOC concentration,we conducted a comparative analysis between natural and planted *** interventions refer to the actions taken by humans to manage,protect,or transform forests,and can be divided into two main categories:environmental intervention and anthropogenic *** study focused on the efects of diferent interventions on SOC in natural and planted forests by reviewing a total of 75 randomized controlled trials in the global literature and extracting a total of 15 diferent *** Through network meta-analysis,we found that natural forests have 22.3%higher SOC than planted forests,indicating their stronger carbon storage *** natural forests,environmental interventions have a stronger *** is signifcantly infuenced by forest age,fertilization,and *** planted forests,however,anthropogenic interventions have a stronger *** branches and fertilization are efective interventions for planted ***,forest degradation has a signifcantly negative impact on SOC in planted *** Overall,interventions to enhance soil carbon storage function difer between natural and planted *** address global climate change,protect biodiversity,and achieve sustainable development,it is imperative to globally protect forests and employ scientifcally sound forest management *** natural forests,the emphasis should be on comprehending the efects of environmental interventions on ***,concerning planted forests,the emphasis should be on comprehending the efects of anthropogenic interventions.

关键词： Natural forest Planted forest Soil organic carbon(SOC) Network meta-analysis Intervention

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Odorant-binding protein 19 in Monochamus alternatus involved in the recognition of a volatile strongly emitted from ovipositing host pines

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Insect Science 2024年第1期31卷 134-146页

作者： Ruinan Yang Dongzhen Li Shancheng Yi Yi Wei Manqun Wang Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhanChina Key Laboratory of Forest Protection of National Forestry and Grassland Administration Ecology and Nature Conservation InstituteChinese Academy of ForestryBeijingChina

Monochamus alternatus is the primary carrier of pine wood nematodes,which pose a serious threat to Pinus *** many *** emerging *** adults feed on heathy host pines,while matured adults transfer to stressed host pines for mating and *** odorant-binding proteins(OBPs)of *** have been proved to aid in the complex process of host *** clarify the corresponding relations between OBPs and pine volatiles,more OBPs need to be *** this research,MaltOBP19 showed a specific expression in the antennae and mouthparts of ***,and it was marked in 4 types of antenna sensilla by *** binding assays demonstrated the high binding affinity of MaltOBP19 with camphene and myrcene in *** Y-tube olfactory experiments,*** adults were attracted by camphene and RNAi of OBP19 via microinjection significantly decreased their attraction *** induced phobotaxis,but RNAi had no significant effect on this ***,we found that ingesting dsOBP19 produced by a bacteria-expressed system with a newly constructed vector could lead to the knockdown of *** results suggest that MaltOBP19 may play a role in the process of host conversion via the recognition of camphene,which has been identified to be strongly released in stressed host *** addition,it is proved that knockdown of OBP can be achieved by oral administration of bacteria-expressed double-stranded RNA in *** adults,providing a new perspective in the control of ***.

关键词： bacteria-expressed dsRNA camphene Japanese pine sawyer beetle MaltOBP19 RNAi stressed host pines

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