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Fabrication and Mechano-sensing Characteristics of Bending Polypyrrole Actuator

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Journal of Wuhan university of Technology(Materials Science) 2025年第1期 240-245页

作者：陈金友胡巍 School of Automotive Engineering Hunan Financial & Industrial Vocational-technical College College of Mechanical and Electrical Engineering Hunan Agricultural University

To prepare a conductive polymer actuator with decent performance,a self-built experimental platform for the preparation of polypyrrole film is *** of the essential goals is to examine the mechanical characteristics of the actuator in the presence of various combinations of process parameters,combined with the orthogonal test method of "four factors and three levels".The bending and sensing characteristics of actuators of various sizes are methodically examined using a self-made bending polypyrrole *** functional relationship between the bending displacement and the output voltage signal is established by studying the characteristics of the actuator sensor subjected to various degrees of *** experimental results reveal that the bending displacement of the actuator tip almost exhibits a linear variation as a function of length and *** the voltage reaches 0.8 V,the bending speed of the actuator tends to be ***,the mechanical properties of the self-assembled polypyrrole actuator are verified by the design and fabrication of the microgripper.

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Fine-tuning the spatial allocation of phytohormones for smart canopy, smart breeding, and smart agriculture

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Science China Life Sciences 2025年第1期 309-310页

作者： Tao Zhou Lin Li National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University HuBei HongShan Laboratory

The dual challenges of global climate change and population growth have increased demand for higher crop yields per unit area. The innovative technology of smart agriculture aims to synergize breeding, cultivation, and production through the application of biological and informatics technologies. Historically, the “Green Revolution” introduced semidwarf varieties of certain key crops by utilizing mutations affecting gibberellin pathways, which significantly increased planting densities and yields.

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Robust H_(∞)state estimation for a class of complex networks with dynamic event-triggered scheme against hybrid attacks

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Chinese Physics B 2022年第2期31卷 269-277页

作者： Yahan Deng Zhongkai Mo Hongqian Lu School of Intelligent Systems Engineering Guangxi City Vocational UniversityChongzuo 532200China

We investigate the dynamic event-triggered state estimation for uncertain complex networks with hybrid delays suffering from both deception attacks and denial-of-service ***,the effects of time-varying delays and finitedistributed delays are considered during data transmission between ***,a dynamic event-triggered scheme(ETS)is introduced to reduce the frequency of data transmission between sensors and ***,by considering the discussed plant,dynamic ETS,state estimator,and hybrid attacks into a unified framework,this framework is transferred into a novel dynamical ***,with the help of Lyapunov stability theory and linear matrix inequality techniques,sufficient condition to ensure that the system is exponentially stable and satisfies H∞performance constraints is obtained,and the design algorithm for estimator gains is ***,two numerical examples verify the effectiveness of the proposed method.

关键词： dynamic event-triggered scheme hybrid attacks complex networks state estimation

Remediation mechanism of“double-resistant”bacteria—Sedum alfredii Hance on Pb-and Cd-contaminated soil

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Ecological Processes 2022年第1期11卷 78-92页

作者： Tongdong Mo Daihua Jiang Dingding Shi Shaohui Xu Xuejiao Huang Zhigang Huang College of Agriculture Guangxi UniversityNanningChina guangxi Key Laboratory of agricultural Environment and agricultural Product Safety NanningChina

Background:Concentrations of heavy metals continue to increase in soil environments as a result of both anthro-pogenic activities and natural ***(Cd)and lead(Pb)is one of the most toxic heavy metals and pose health risks to both humans and the ***,effectively solving the problem of heavy metal pollution is the concern of soil *** the existing remediation techniques,only the combined use of microorganisms and plants for remediation of heavy metal-contaminated soil is the greenest and most developed ***,based on this background,this study investigates the remediation mechanism of Pb and Cd heavy metals using the combined action of bacteria and Sedum alfredii ***:In order to enrich the research theory of combined plant and microorganism remediation of heavy metal-contaminated soil,we constructed a heavy metal composite pollution remediation system by combining Pb and Cd-tolerant bacteria with the Pb and Cd hyperaccumulator plant—Sedum alfredii Hance to investigate its combined remediation effect on Pb and Cd composite contaminated ***:The results showed that resistant bacteria were able to promote enrichment of Pb and Cd in Sedum alfredii Hance and J2(200 ml of bacterial solution)was significantly(P<0.05)more effective than J1(100 ml of bacterial solution).The resistant bacteria were able to alleviate the toxic effects of Pb and Cd heavy metals on Sedum alfredii Hance and promote growth while reducing rhizosphere soil *** resistant bacteria were able to significantly reduce the effective state of Pb and Cd in the rhizosphere soil(P<0.05),with the greatest reduction in the effective state of Pb in treatment A(Cd7Pb100 mg/kg),where J2 was reduced by 9.98%compared to J0,and the greatest reduction in the effective state of Cd in treatment C(Cd28Pb400 mg/kg),where J2 was 43.53%lower than *** addition,the resistant bacteria were able to increase the exchangeable state Cd content by 0.97 to 9.85%.The

关键词： “Double-resistant”bacteria Sedum alfredii Hance Lead and cadmium contamination Combined remediation

Spraying Arginine at 5 Days before Harvest Delays Postharvest Broccoli Senescence via Nutrient Accumulation

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食品科学 2025年第1期46卷 131-141页

作者： SUN Yupeng CHEN Ying SHANG Qingwen GUO Yanyin ZHANG Yuxiao WANG Yunqiao XUE Qingyue College of agricultural Engineering and Food Science Shandong University of TechnologyZibo 255049China Zichuan District agricultural and Rural Affairs Service Center Zibo 255049China

To determine the effects of preharvest arginine spraying on the nutritional level of broccoli and the mechanism of action of arginine in improving the storage quality of broccoli,arginine spraying(5 mmol/L)was conducted at 0,1,3,and 5 days before *** appearance,respiration rate,mass-loss rate,electrolyte leakage,glucosinolate,ascorbic acid,total phenol,total flavonoid,total sugar and sucrose contents,and sucrose phosphate synthase(SPS),invertase(INV),sucrose synthase synthesis(SSS)and cleavage(SSC)activities of broccoli samples were observed after 0,2,4,6,8,and 10 days of *** results showed that spraying arginine at 5 days preharvest(5-ARG)helped to inhibit broccoli respiration during storage,delay electrolyte leakage,and maintain broccoli ***,during the growth stage,total sugar accumulation was higher in the 5-ARG *** addition,during the storage period,sucrose synthesis was accelerated,while sucrose cleavage was inhibited,resulting in more sucrose retention in postharvest *** conclusion,5-ARG resulted in the accumulation of more nutrients during the growth process and effectively delayed the quality decline during storage,thereby prolonging the shelf life of ***,this study provides a theoretical basis for improving postharvest storage characteristics of broccoli through preharvest treatments.

关键词： arginine broccoli preharvest spraying nutrient accumulation storage quality postharvest senescence

Satellite remote sensing reveals overwhelming recovery of forest from disturbances in Asia

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 46-51页

作者： Yiying Zhu Hesong Wang Anzhi Zhang School of Ecology and Nature Conservation Beijing Forestry UniversityBeijingChina Key Laboratory of Regional Climate and Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Forestry and Landscape Architecture Xinjiang Agricultural UniversityUrumqiChina

Forest ecosystems play key roles in mitigating human-induced climate change through enhanced carbon uptake;however,frequently occurring climate extremes and human activities have considerably threatened the stability of *** the same time,detailed accounts of disturbances and forest responses are not yet well quantified in *** study employed the Breaks For Additive Seasonal and Trend method-an abrupt-change detection method-to analyze the Enhanced Vegetation Index time series in East Asia,South Asia,and Southeast *** approach allowed us to detect forest disturbance and quantify the resilience after *** showed that 20%of forests experienced disturbance with an increasing trend from 2000 to 2022,and Southeast Asian countries were more severely affected by ***,95%of forests had robust resilience and could recover from disturbance within a few *** resilience of forests suffering from greater magnitude of disturbance tended to be stronger than forests with lower disturbance *** summary,this study investigated the resilience of forests across the low and middle latitudes of Asia over the past two *** authors found that most forests exhibited good resilience after disturbance and about two-thirds had recovered to a better state in *** findings of this study underscore the complex relationship between disturbance and resilience,contributing to comprehension of forest resilience through satellite remote sensing.

关键词： Forest ecosystem Enhanced vegetation index Breaks for additive seasonal and trend method Disturbance Resilience

Responses of water productivity to irrigation and N supply for hybrid maize seed production in an arid region of Northwest China

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Journal of Arid Land 2017年第4期9卷 504-514页

作者： RAN Hui KANG Shaozhong LI Fusheng DU Taisheng DING Risheng LI Sien TONG Ling Center for agricultural Water Research in China China Agricultural University College of Agriculture Guangxi University

Water and nitrogen（N） are generally two of the most important factors in determining the crop productivity. Proper water and N managements are prerequisites for agriculture sustainable development in arid areas. Field experiments were conducted to study the responses of water productivity for crop yield（WP_（Y-ET）） and final biomass（WP_（B-ET）） of film-mulched hybrid maize seed production to different irrigation and N treatments in the Hexi Corridor, Northwest China during April to September in 2013 and also during April to September in 2014. Three irrigation levels（70%–65%, 60%–55%, and 50%–45% of the field capacity） combined with three N rates（500, 400, and 300 kg N/hm^2） were tested in 2013. The N treatments were adjusted to 500, 300, and 100 kg N/hm^2 in 2014. Results showed that the responses of WP_（Y-ET） and WP_（B-ET） to different irrigation amounts were different. WP_（Y-ET） was significantly reduced by lowering irrigation amounts while WP_（B-ET） stayed relatively insensitive to irrigation amounts. However, WP_（Y-ET） and WP_（B-ET） behaved consistently when subjected to different N treatments. There was a slight effect of reducing N input from 500 to 300 kg/hm^2 on the WP_（Y-ET） and WP_（B-ET）, however, when reducing N input to 100 kg/hm^2, the values of WP_（Y-ET） and WP_（B-ET） were significantly reduced. Water is the primary factor and N is the secondary factor in determining both yield（Y） and final biomass（B）. Partial factor productivity from applied N（PFP_N） was the maximum under the higher irrigation level and in lower N rate（100–300 kg N/hm^2） in both years（2013 and 2014）. Lowering the irrigation amount significantly reduced evapotranspiration（ET）, but ET did not vary with different N rates（100–500 kg N/hm^2）. Both Y and B had robust linear relationships with ET, but the correlation between B and ET（R^2=0.8588） was much better than that between Y and ET（R^2=0.6062）. When ET increased, WP_（Y-ET） linearly increased and WP_（B-ET） decreased. Taking the indices of

关键词： water use efficiency water stress nitrogen use efficiency evapotranspiration water productivity for yield water productivity for biomass arid region

Effect of the moisture content and dry density on the shear strength parameters of collapsing wall in hilly granite areas of South China

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International Soil and Water Conservation Research 2024年第3期12卷 697-713页

作者： Xiaoyang Wang Xiaoxing Qin Jiahao Tan Linxi Yang Lixing Ou Xiaoqian Duan Yusong Deng guangxi Key Laboratory of Forest Ecology and Conservation College of ForestryGuangxi UniversityNanning530004China guangxi Key Laboratory of agricultural environment and agricultural products safety College of AgricultureGuangxi UniversityNanning530004China

The changes in the mechanical properties of collapsing walls under the influence of natural factors in the hilly area of southern China need to be *** systematically studied the influence of the interaction of dry densityρ(1.0,1.1,1.2,1.3,1.4 g/cm3)and moisture content w(0.05,0.1,0.15,0.2,0.25 g/g)on the stability of four soil layers in a collapsing *** soil cohesion decreased with increasing soil *** cohesion force initially increased and then decreased with increasingωand increased with increasingρ;the internal friction angle was mainly affected byωand decreased with increasingω.The cohesion could be used to effectively characterize the stability of the collapsing *** shear strength index was modeled based on interaction between the dry density and moisture content(R2>0.95).The optimal combination of moisture content and dry density was obtained,and the collapsing wall was in the most stable state at a moisture content of 0.12-0.19 g/g and a dry density of 1.40 g/*** on the analysis of the critical height and safety factor(FS),the FS values of the sandy layer(C)was 0.53 and 0.57 forωvalues of 0.25 g/g and 0.05 g/g,*** the alternating process of soil wetting and drying,the basic properties of the soil changed;caused traceback erosion,and thereby affected the stability of the collapsing *** study provides a theoretical basis for the investigation of the factors influencing the stability of collapsing walls.

关键词： Benggang Shear strength Cohesion force Internal friction angle Safety coefficient

OsNPF3.1,a member of the NRT1/PTR family,increases nitrogen use efficiency and biomass production in rice

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The Crop Journal 2023年第1期11卷 108-118页

作者： Xinghai Yang Baoxuan Nong Can Chen Junrui Wang Xiuzhong Xia Zongqiong Zhang Yu Wei Yu Zeng Rui Feng Yanyan Wu Hui Guo Haifeng Yan Yuntao Liang Shuhui Liang Yong Yan Danting Li Guofu Deng guangxi Key Laboratory of Rice Genetics and Breeding Rice Research InstituteGuangxi Academy of Agricultural SciencesNanning 530007GuangxiChina guangxi Key Laboratory for Polysaccharide Materials and Modifications School of Marine Sciences and BiotechnologyGuangxi University for NationalitiesNanning 530006GuangxiChina Biotechnology Research Institute Guangxi Academy of Agricultural SciencesNanning 530007GuangxiChina Sugarcane Research Institute Guangxi Academy of Agricultural SciencesNanning 530007GuangxiChina Microbiology Research Institute Guangxi Academy of Agricultural SciencesNanning 530007GuangxiChina

The overuse of nitrogen(N)fertilizer in fields has increased production costs and raised environmental *** the N use efficiency(NUE)of rice varieties is crucial for sustainable *** we report the cloning and characterization of OsNPF3.1,a gene that controls rice *** amino acid mutation in the OsNPF3.1 coding region caused different NUEs in wild and cultivated ***3.1,which is expressed mainly in the aerial parts of rice,also affects rice plant height,heading date,and thousand-grain *** OsNPF3.1 protein is located in the plasma *** OsNPF3.1 was subjected to artificial selection,two naturally varying loci were associated with NUE,of which OsNPF3.1Chr6_8741040differed between indica and japonica ***3.1 can be used as a new target gene for breeding rice varieties with high NUE.

关键词： Rice OsNPF3.1 Functional analysis Evolutionary analysis Natural variation