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Fractal image analysis and bruise damage evaluation of impact damage in guava

Information Processing in Agriculture 2024年第2期11卷 217-227页

作者： Than Htike Rattapon Saengrayap Hiroaki Kitazawa Saowapa Chaiwong School of Agro-Industry Mae Fah Luang UniversityChiang Rai 57100Thailand Department of Agriculture Ministry of AgricultureLivestock and Irrigation 11181Myanmar Integrated Agri-Tech ecosystem research group Mae Fah Luang UniversityChiang Rai 57100Thailand Institute of Food research National Agriculture and Food Research OrganizationIbaraki 305-8642Japan

Impact bruise damage and quality of‘Gim Ju’guava were investigated for different drop heights and number of drops using fractal image *** the impact test,a stainless-steel metal ball(250 g)was dropped on fruit from three drop heights(0,0.3,0.6 m)either once or five *** quality was evaluated for impact energy,bruise area(BA),bruise volume(BV),bruise susceptibility,bruise score and pulp color(L*,a*,b*and C values).The fractal dimension(FD)value using fractal image analysis was analyzed at the bruise *** showed that five drops(0.3 m)with a high impact energy(3678.75 J)and a single drop(0.6 m)with a low impact energy(1471.50 J)exhibited no significant in BA,BV,bruise score as well as all color values(L*,a*,b*and C).While the FD value of a single drop from 0.6 m had a higher FD value than that of five drops from 0.3 *** is indicated that FD exhibited a better performance to classify impact bruising level of guava than BA,BV and color *** FD value gradually decreased with increase of storage time and bruise *** correlation coefficient(r)values of FD(r=−0.794 and−0.745)between BA and BV were more significant than those L*(r=−0.660 and−0.615)and a*(r=0.579 and 0.473).The coefficient of determination(R^(2))of the polynomial equation in bruised fruit(R^(2)=0.85 to 0.99)was greater than the control(no bruise)(R^(2)=0.80).A higher R^(2)val(0.88 and 0.92)was exhibited at five ***,FD analysis showed greater potential than color measurement to assess bruise impact damage in guava.

关键词： Bruise susceptibility Impact bruise Mechanical injury Transportation

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Isotopic insights on quantitative assessments of interaction of eco-hydrological processes in multi-scale karst watersheds

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International Soil and Water Conservation research 2024年第1期12卷 156-170页

作者： Zhuo Hao Yang Gao Qingwen Zhang Wen Wen Agricultural Clean Watershed research group Institute of Environment and Sustainable Development in AgricultureCAASBeijing100081China Key Laboratory of ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing100101China School of Humanities and Social Sciences Beijing Institute of TechnologyBeijing100081China

The dynamics of hydrological processes and the storage mechanisms of karst water resources are the most important issues in karst *** impact of environmental changes on water quantity,and the evaluation and quantification of eco-hydrological processes remain poorly *** this study,high-frequency continuous monitoring in multi-scale karst watersheds in Southwest China combined the approaches of water isotopes and the hybrid single-particle lagrangian integrated trajectory(HYSPLIT)model to identify the recharge mechanisms between atmospheric vapor,rainfall,surface water,and groundwater,and to reveal the interaction of eco-hydrological *** dominant moisture sources in Puding(PD)County were the Indian Ocean(43-69%)and local moisture(24-33%).Theδ^(18)O and deuterium excess(d-excess)values showed a positive correlation indicating that secondary or sub-cloud evaporation was prominent in the wet *** water line-conditioned excess(lc-excess)indicated that karst water interacted with recent precipitation,groundwater,and evaporation across *** to its specific hydrogeological structure,surface water and rainwater have a higher contribution rate to groundwater *** Chenqi stream replenished the Houzhai River mainly in the form of groundwater,with percentages ranging from 38.1 to 93.5%in the wet season,and 47.8-80.1%in the dry *** the Houzhai outlet,surface water and groundwater interconverted frequently with a percentage of 45.6-49.1%.We believe this is the first systematic study to quantify the supply relationship between water vapor transport,rainfall,surface water and groundwater in the Chinese karst zone,making a significant move forward in the field of karst hydrological processes and improving the efficiency of water resource evaluation and management.

关键词： Stable isotope Moisture sources Water cycle Karst watersheds

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Hybrid Beamforming Design and Signal Processing with Fully-Connected Architecture for mmWave Integrated Sensing and Communications

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Journal of Communications and Information Networks 2024年第2期9卷 151-161页

作者： Hongyu Li Jun Gong Wenchi Cheng The 54th research Institute of China Electronics Technology group Corporation Shijiazhuang 050080China State Key Laboratory of Integrated services Networks Xidian UniversityXi’an 710071China

Millimeter-wave (mmWave) is capable of achieving gigabit/second communication capacity and centimeter-level sensing accuracy and has become one of the main frequency bands for integrated sensing and communications (ISAC) research. Hybrid beamforming techniques have attracted much attention for solving the high path loss of mmWave and further reducing the hardware cost of the system. However, the related studies based on multicarrier and fully-connected hybrid architectures are still limited. For this reason,this paper investigates the orthogonal frequency division multiplexing (OFDM) based mmWave fully-connected hybrid architecture ISAC system to form a stable communication beam and dynamically varying sensing beam. In order to realize the aforementioned multifunctional beams, the hybrid beamformer design problem based on weighted error minimization of multicarrier is proposed and solved efficiently using the penalty dual decomposition (PDD) algorithm. Meanwhile, based on the echo model, the multicarrier multiple signal classification (MUSIC) algorithm for target angle of arrival estimation and the two-dimensional discrete Fourier transform(2D-DFT)algorithm for distance and velocity estimation are proposed, respectively. Numerical simulation results show that by adjusting the weighting factor,a flexible trade-off can be formed between the communication spectrum efficiency and the sensing accuracy error.

关键词： integrated sensing and communications hybrid beamforming fully-connected architecture millimeter-wave

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Summer gregarine infection in Antarctic krill Euphausia superba in the Dumont D’Urville Sea,East Antarctic

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Journal of Oceanology and Limnology 2024年第5期42卷 1651-1658页

作者： Yi XIONG Sijie ZHAO Guoping ZHU College of Marine Living Resource Sciences and Management Shanghai Ocean UniversityShanghai 201306China Center for Polar research Shanghai Ocean UniversityShanghai 201306China Polar Marine ecosystem group the Key Laboratory of Sustainable Exploitation of Oceanic Fisheries ResourcesMinistry of EducationShanghai 201306China National Engineering research Center for Oceanic Fisheries Shanghai 201306China

Antarctic krill Euphausia superba plays a key role in the Antarctic food *** trophic linkage between krill and other macro-organisms has been studied in the past decades,but the variability of parasites in krill is less studied and remains poorly ***,it is important to understand the factors that influence abundance and infection of parasites in ***,the relationship between the infection intensity of parasite and krill diet needs to be clarified,which is helpful for understanding the role of parasite in the food *** investigated the abundance of the highly prevalent gregarine parasites in the digestive tract of krill and the factors influencing the gregarine infection to krill in the East *** infection rate of Cephaloidophora pacifica Avdeev,1985 to krill(n=50 individuals)was 94%.The results of generalized linear model show the infection intensity of *** to the host was related significantly to the station,krill size,and maturity stage,but not the food species and abundance in the stomach of *** of *** in krill differed among stations,and the lowest abundance occurred in the station nearest to the *** abundance varied among sexual maturity stages of krill and increased with krill size.

关键词： Cephaloidophora pacifica Euphausiids parasite diet dinoflagellate

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Towards Achieving Carbon Neutrality: The Role of Vegetation Restoration in Karst Regions of Southwest China

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Journal of Earth Science 2024年第3期35卷 1044-1048页

作者： Yuemin Yue Lu Wang Xinbao Zhang Kelin Wang Guangxi Key Laboratory of Karst Ecological Processes and services Institute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China Huanjiang Observation and research Station for Karst ecosystem Chinese Academy of SciencesHuanjiang 547100China Chengdu Institute of Mountain Disasters and Environment Chinese Academy of Sciences&Ministry of Water ResourcesChengdu 610041China

Karst regions of Southwest China become a hotspot for global greening through large-scale vegetation restoration in recent two ***,the unique,fragile geological setting of carbonate rocks affects the sustainability of vegetation ***,we summarize and evaluate the impacts of the rock and soil compositions of karst landscapes on the types and quality of vegetation *** introduce the concept of“soil mass”and establish its relationship with aboveground vegetation biomass across varying degrees of rocky *** mineral nutrients and soil mass constrain the potential of vegetation carbon sequestration in karst *** enhance the sustainability of vegetation restoration and carbon sequestration under karst geological constraints,we suggest to push ecological intensification of tree plantations and optimize the zoning and classification of rocky desertification treatment,and these restoration initiatives will foster vegetation restoration to serve as a pivotal pathway towards carbon neutrality.

关键词： soil karst Restoration

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Carbon sequestration in a bamboo plantation:a case study in a Mediterranean area

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Journal of Forestry research 2024年第3期35卷 231-238页

作者： Tommaso Chiti Emanuele Blasi Maria Vincenza Chiriaco Department for Innovation in Biological Agro-Food and Forest Systems(DIBAF)University of TusciaVia San C.De Lellis snc01100 ViterboItaly Foundation Euro-Mediterranean Center on Climate Change(CMCC) Division on Climate Change Impacts on AgricultureForests and Ecosystem Services(IAFES)Via Garbini5101100 ViterboItaly

In the Mediterranean region,despite bamboo being an alien species that can seriously alter plant and ani-mal biocoenosis,the area occupied by bamboo plantations continues to increase,especially for the purpose to seques-ter carbon(C).However,the C dynamics in the soil-plant system when bamboo is grown outside its native area are poorly *** we investigated the C mitigation potential of the fast-growing Moso bamboo(Phyllostachys edulis)introduced in Italy for climate-change *** analyzed aboveground(AGB)and belowground(as root/shoot ratio)biomass,litter and soil organic C(SOC)at O-15-and 15-30-cm depths in a 4-year-old bamboo plantation in comparison with the former annual cropland on which the bamboo was *** have an idea of the maximum C stored at an ecosystem level,a natural forest adjacent the two sites was also *** the plantation,C accumulation as AGB was stimulated,with 14.8±3.1 Mg C ha^(-1) stored in 3 years;because thinning was done to remove culms from the first year,the mean sequestration rate was 4.9 Mg C ha^(-1) a^(-1).The sequestration rates were high but comparable to other fast-growing tree species in Italy(e.g.,Pinus nigra).SOC was significantly higher in the bamboo plantation than in the cropland only at the 0-15 cm depth,but SOC stock did not *** 4 years were not enough time for a clear increase in SOC,or the high nutrient uptake by bamboos might have depleted the soil nutrients,thus inhibiting the soil organic matter formation by *** comparison,the natural forest had significantly higher C levels in all the *** C dynamics at an ecosystem level,the bamboo plantation on the former annual cropland led to substantial C removal from the atmosphere(about 12 Mg C ha^(-1) a^(-1)).However,despite the promising C sequestration rates by bamboo,its introduction should be carefully considered due to potential ecological problems caused by this species in overexploited environments such as the Med

关键词： Carbon sequestration Climate change mitigation Mediterranean area Moso bamboo Soil organic carbon

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Organic-inorganic fertilization promotes paddy soil macroaggregate organic carbon accumulation associated with key bacterial populations in subtropical China

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Pedosphere 2024年第5期34卷 941-950页

作者： Jinhua ZHAO Lin CHEN Guixiang ZHOU Fang LI Jiabao ZHANG Congzhi ZHANG Donghao MA Biao FENG Fengqiu Experimental Station of National ecosystem research Network of China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences University of Chinese Academy of Sciences College of Resources and Environment Henan Agricultural University

Macroaggregate organic carbon (Macro-OC) accumulation in paddy soils is of great significance in promoting multiple agroecosystem services. However,the effects of different fertilization practices on Macro-OC accumulation in paddy soils at the regional scale have not been comprehensively ***, we conducted long-term fertilization field experiments at four sites, Taoyuan, Wangcheng, Jinxian, and Suzhou, in the subtropical area of China to reveal the effects of inorganic and organic-inorganic (OIF) fertilization on Macro-OC accumulation and its relationships with important microbial traits (the abundance ratio of GH48:cbhI genes and the richness of keystone bacterial taxa) in paddy soils. The results showed that long-term fertilization (particularly OIF) significantly increased the content of Macro-OC, which mainly consisted of particulate organic carbon (C). Organic-inorganic fertilization decreased the percentage of O-alkyl C but increased the percentages of alkyl, aromatic, and phenolic C. Organic-inorganic fertilization promoted the abundance of the bacterial cellulose-degrading gene GH48 retrieved from macroaggregates. The orders Anaerolineales, Bacillales, and Clostridiales were identified as keystone bacterial taxa in macroaggregates and were significantly correlated with the physical fraction and chemical structure of Macro-OC. Structural equation modeling revealed that fertilization-induced changes in soil pH and C:N ratio affected the richness of Anaerolineales, Bacillales, and Clostridiales, which was strongly associated with the increase of percentages of aromatic and phenolic C and further facilitated Macro-OC accumulation. Together, these results suggested that OIF promoted Macro-OC accumulation associated with key bacterial populations in paddy soils. The results provide an important basis for boosting soil C accrual in the subtropical rice-growing areas.

关键词： bacterial community keystone bacterial taxa mean weight diameter mineral-associated organic carbon particulate organic carbon structural equation modeling

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Epidemiological features of seasonal influenza transmission among 11 climate zones in Chinese mainland

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Infectious Diseases of Poverty 2024年第1期13卷 27-41页

作者： Xiaohan Si Liping Wang Kerrie Mengersen Wenbiao Hu ecosystem Change and Population Health research group School of Public Health and Social WorkQueensland University of TechnologyBrisbaneQLD 4059Australia Information Center Chinese Center for Disease Control and PreventionBeijing 102206China School of Mathematical Sciences Queensland University of TechnologyBrisbaneQLD 4000Australia

Background Previous studies provided some evidence of meteorological factors influence seasonal influenza transmission patterns varying across regions and latitudes. However, research on seasonal influenza activities based on climate zones are still in lack. This study aims to utilize the ecological-based Koppen Geiger climate zones classification system to compare the spatial and temporal epidemiological characteristics of seasonal influenza in Chinese mainland and assess the feasibility of developing an early warning *** Weekly influenza cases number from 2014 to 2019 at the county and city level were sourced from China National Notifiable Infectious Disease Report Information System. Epidemic temporal indices, time series seasonality decomposition, spatial modelling theories including Moran’s/ and local indicators of spatial association were applied to identify the spatial and temporal patterns of influenza *** All climate zones had peaks in Winter-Spring season. Arid, desert, cold (BWk) showed up the first peak. Only Tropical, savannah (Aw) and Temperate, dry winter with hot summer (Cwa) zones had unique summer peak. Temperate, no dry season and hot summer (Cfa) zone had highest average incidence rate (IR) at 1.047/100,000. The Global Moran’s/ showed that average IR had significant clustered trend (z = 53.69,P groups between climate zones (0-14 years old:F = 26.80,P group 0-14 years had highest average IR in Cwa and Cfa (IR= 6.23 and 6.21) with unique dual peaks in winter and spring season showed by seasonality *** Seasonal influenza exhibited distinct spatial and temporal patterns in different climate zones. Seasonal influenza primarily emerged in BWk, subsequently in Cfa and Cwa. Cfa, Cwa and BSk pose high risk for seasonal

关键词： Seasonal influenza Koppen Geiger climate zones classification system Chinese mainland Seasonality decomposition Local indicators of spatial association

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A brief history of the Compendium of Physical Activities

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Journal of Sport and Health Science 2024年第1期13卷 3-5页

作者： Barbara E.Ainsworth Stephen D.Herrmann David R.Jacobs Jr. Melicia C.Whitt-Glover Catrine Tudor-Locke School of Exercise and Health Shanghai University of SportShanghai 200438China College of Health Solutions Arizona State UniversityPhoenixAZ 85003USA Kansas Center for Metabolism and Obesity research University of Kansas Medical CenterKansas CityKS 66160USA Division of Epidemiology and Community Health University of MinnesotaMinneapolisMN 55455USA Gramercy research group KnightdaleNC 27545USA College of Health and Human services University of North Carolina at CharlotteCharlotteNC 28223USA

The Compendium of Physical Activities(Compendium)was developed to address consistent assignment of physical activity(PA)intensity values used in PA epidemiology research of the association between PA and health outcomes.1The known protective effects of PA on incident health outcomes traces to the mid-1900s,with over 50 studies examining coronary heart disease(CHD)as the outcome of interest.

关键词： epidemiology Activities protective

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Mechanism of plant-soil feedback in a degraded alpine grassland on the Tibetan Plateau

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Journal of Plant Ecology 2024年第2期17卷 188-199页

作者： Tiancai Zhou Jian Sun Peili Shi Key Laboratory of ecosystem Network Observation and Modelling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Tibetan Plateau Earth System Resources and EnvironmentInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Biodiversity and Environment on the Qinghai-Tibet Plateau Ministry of EducationLhasa 850011China Tibet research Academy of Eco-environmental Sciences Lhasa 850000China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Although biotic and abiotic factors have been confirmed to be critical factors that affect community dynamics,their interactive effects have yet to be fully considered in grassland ***,we tested how soil nutrients and microbes regulated plant-soil feedback(PSF)in a degraded alpine *** results indicated that soil total carbon(STC;from 17.66 to 12.55 g/kg)and total nitrogen(STN;from 3.16 to 2.74 g/kg)exhibited significant(Pgroup shift from monocots with higher vulnerability to soil pathogens in the ND fertile soil to dicots with higher dependence on nutritional mutualists in the degraded infertile *** emerging irreversible eco-evolutionary in PSF after degradation might cause a predicament for the restoration of degraded grassland.

关键词： plant-soil feedback plant function groups degradation alpine grassland Tibetan Plateau

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