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Variation in spectral characteristics of dissolved organic matter derived from rape straw of plants grown in Se-amended soil

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Journal of Integrative Agriculture 2020年第7期19卷 1876-1884页

作者： JIA Wei zhao xiao-hu zhao Yuan-yuan XU Jia-yang MING Jia-jia CAI Miao-miao hu Cheng-xiao College of Resources and Environment/Research Center of Trace Elements Huazhong Agricultural University/Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River)Ministry of Agriculture and Rural AffairsWuhan 430070P.R.China hubei Provincial Engineering Laboratory for New-type Ferilizer Wuhan 430070P.R.China

Straw return is an effective management practice. It not only utilizes agricultural waste but also introduces dissolved organic matter(DOM) into the soil. Selenium(Se) is an essential trace element in the human diet and contributes to the popularity of Se-enriched agricultural products in the Chinese market. Moreover, there are still some Se-enriched agricultural products that have yet to be utilized. This study investigated whether Se addition in soil caused component changes in the DOM extracted from rape straw. DOM extracted from rape straw grown in soil with four Se levels(0, 0.1, 0.5 and 1.0 mg Se kg-1 soil) was characterized by UV-Visible spectroscopy, fluorescence spectroscopy and FTIR spectroscopy. The UVvisible spectra revealed that 0.1 mg Se kg-1 soil reduced the molecular weight of DOM and caused the presence of more irreplaceable aromatic structures in the substituent groups of the DOM, while 0.5 and 1.0 mg Se kg-1 soil only reduced the DOM molecular weight. Fluorescence spectroscopy indicated that Se improved the humification degree but reduced the aromaticity of DOM. FTIR spectra proved that Se altered the contents of carboxylic acids, amino acids, alcohols and aromatic heterocycles in DOM, which were maximized in the 0.5 and 1.0 mg Se kg-1 treatment groups. We concluded that Se application could change the composition of DOM extracted from rape straw, potentially impacting the nutrient bioavailability in soil. This study provides basic data on Se-enriched rape straw utilization for eco-agriculture.

关键词： composition dissolved organic matter rape straw selenium spectroscopy

On-line least squares support vector machine algorithm in gas prediction

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Mining Science and Technology 2009年第2期19卷 194-198页

作者： zhao xiao-hu WANG Gang zhao Ke-ke TAN De-jian School of Information ＆ Electronic Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Traditional coal mine safety prediction methods are off-line and do not have dynamic prediction *** Support Vector Machine(SVM) is a new machine learning algorithm that has excellent *** least squares support vector machine(LS-SVM) algorithm is an improved algorithm of *** the common LS-SVM algorithm,used directly in safety predictions,has some *** have first studied gas prediction problems and the basic theory of *** these problems,we have investigated the affect of the time factor about safety prediction and present an on-line prediction algorithm,based on ***,given our observed data,we used the on-line algorithm to predict gas emissions and used other related algorithm to compare its *** simulation results have verified the validity of the new algorithm.

关键词： LS-SVM gas on-line learning prediction

益肠散结颗粒对结肠癌小鼠肠道菌群及免疫功能的调节作用及机制研究

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广州中医药大学学报 2024年第3期41卷 719-728页

作者：侯爱画戴玲玲孟鹏张晓妮谭松刘泽赵啸虎烟台市中医医院肿瘤科山东烟台264000 烟台市中医医院肿瘤四科山东烟台264000 烟台市中医医院肿瘤一科山东烟台264000

【目的】观察益肠散结颗粒对结肠癌小鼠肠道菌群及免疫功能的调节作用及机制。【方法】将60只小鼠随机分为6组,即正常组,模型组,益肠散结颗粒低、中、高剂量组,过表达黑色素瘤缺失基因2(AIM2)质粒(pcDNA-AIM2)干预组,每组10只。除正常组... 详细信息

【目的】观察益肠散结颗粒对结肠癌小鼠肠道菌群及免疫功能的调节作用及机制。【方法】将60只小鼠随机分为6组,即正常组,模型组,益肠散结颗粒低、中、高剂量组,过表达黑色素瘤缺失基因2(AIM2)质粒(pcDNA-AIM2)干预组,每组10只。除正常组,其他各组采用氧化偶氮甲烷(AOM)/葡聚糖硫酸钠(DSS)诱导法制备结肠癌模型。给药后,绘制各组小鼠生存曲线,计算肿瘤体积;酶联免疫吸附分析(ELISA)检测血清中免疫球蛋白(Ig)G、IgM、白细胞介素(IL)-1β和IL-18水平;流式细胞仪检测外周血T细胞CD3^(+)、CD4^(+)、CD8^(+)水平;测定脾指数;苏木素-伊红(HE)染色法观察结肠组织病理学变化;16S-rDNA肠道菌群测序检测肠道菌群α多样性及肠道菌群群落结构;蛋白免疫印迹(Wetsern Blot)法检测结肠组织中AIM2、凋亡相关斑点样蛋白(ASC)、胱天蛋白酶1(caspase-1)蛋白表达。【结果】与正常组比较,模型组小鼠生存率,血清中IgG、IgM水平,外周血中CD3^(+)、CD4^(+)水平和CD4^(+)/CD8^(+)比值,结肠组织AIM2、ASC、caspase-1蛋白表达水平显著降低,肿瘤体积,血清中IL-1β、IL-18水平,外周血CD8^(+)水平,脾指数显著增加(均P<0.05),HE染色结果可见结肠癌组织特征表现;与模型组比较,益肠散结颗粒低、中、高剂量组和pcDNA-AIM2组小鼠生存率,血清中IgG、IgM水平,外周血中T细胞CD3^(+)、CD4^(+)水平和CD4^(+)/CD8^(+)比值,结肠组织AIM2、ASC、caspase-1蛋白表达水平显著升高,肿瘤体积,血清中IL-1β、IL-18水平,外周血CD8^(+)水平,脾指数显著降低(均P<0.05),HE染色结果可见结肠癌组织病理改变减轻。与正常组比较,模型组小鼠Observed指数、Chao1指数、Shannon指数,拟杆菌门、变形菌门、杆菌科、毛螺菌属、瘤胃梭菌属菌落相对丰度显著降低,厚壁菌门、放线菌门和Patescibateria、乳杆菌属、臭杆菌属、别样杆菌属、未培养的瘤胃球菌科和拟杆菌属菌落相对丰度升高(P<0.05);与模型组比较,益肠散结颗粒低、中、高剂量组和pcDNA-AIM2组小鼠Observed指数、Chao1指数和Shannon指数,拟杆菌门、变形菌门、杆菌科、毛螺菌属、瘤胃梭菌属菌落相对丰度显著升高,厚壁菌门、放线菌门和Patescibateria、乳杆菌属、臭杆菌属、别样杆菌属、未培养的瘤胃球菌科和拟杆菌属菌落相对丰度降低(均P<0.05)。【结论】益肠散结颗粒可增强结肠癌小鼠自身免疫力,改善肠道菌群结构,其作用机制与激活AIM2炎性小体有关。

关键词：益肠散结颗粒结肠癌肠道菌群免疫功能黑色素瘤缺失基因2(AIM2) 小鼠

Coefficients of earth pressure at rest in thick and deep soils

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Mining Science and Technology 2009年第2期19卷 252-255页

作者： TIAN Qiu-hong XU Zhi-wei ZHOU Guo-qing zhao xiao-dong hu Kun State Key Laboratory for Geomechanics ＆ Deep Underground Engineering School of Architecture and Civil Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

The effect of test methods and stress paths on the experimental value of the coefficient of earth pressure at rest, K0, was investigated under high pressures. The results indicate that the rigid pressure chamber and flexible lateral confining pressure medium method gives a stress ratio at the initial stage that is not the real K0. Moreover, K0 increases during the loading process becoming greater at high pressures. In the unloading process, however, K0 increases only at the initial stage but decreases thereafter. In addition, the incremental magnitude definition, K0=dσ3/dσ1, gives higher values than the total magnitude definition, K0=σ3/σ1, under loading. This is also true during initial stages of unloading. The experiment results also indicate that earth pressure at rest in deep and thick soils can be estimated by a power function of axial and confining pressures. It is necessary to choose the appropriate Kn to avoid some accidents.

关键词： experimental research earth pressure at rest loading and unloading paths thick and deep soils

Assessment of Wet Season Precipitation in the Central United States by the Regional Climate Simulation of the WRFG Member in NARCCAP and Its Relationship with Large-Scale Circulation Biases

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Advances in Atmospheric Sciences 2024年第4期41卷 619-638页

作者： Yating zhao Ming XUE Jing JIANG xiao-Ming hu Anning huANG School of Atmospheric Sciences Nanjing UniversityNanjing 210023China Center for Analysis and Prediction of Storms and School of Meteorology The University of OklahomaNorman 73072U.S.A

Assessment of past-climate simulations of regional climate models(RCMs)is important for understanding the reliability of RCMs when used to project future regional ***,we assess the performance and discuss possible causes of biases in a WRF-based RCM with a grid spacing of 50 km,named WRFG,from the North American Regional Climate Change Assessment Program(NARCCAP)in simulating wet season precipitation over the Central United States for a period when observational data are *** RCM reproduces key features of the precipitation distribution characteristics during late spring to early summer,although it tends to underestimate the magnitude of *** dry bias is partially due to the model’s lack of skill in simulating nocturnal precipitation related to the lack of eastward propagating convective systems in the *** in reproducing large-scale circulation and environmental conditions is another contributing *** too weak simulated pressure gradient between the Rocky Mountains and the Gulf of Mexico results in weaker southerly winds in between,leading to a reduction of warm moist air transport from the Gulf to the Central Great *** simulated low-level horizontal convergence fields are less favorable for upward motion than in the NARR and hence,for the development of moist convection as ***,a careful examination of an RCM’s deficiencies and the identification of the source of errors are important when using the RCM to project precipitation changes in future climate scenarios.

关键词： NARCCAP Central United States precipitation low-level jet large-scale environment diurnal variation

Investigation of mechanical and electrical characteristics of selfsensing pneumatic torsional actuators

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Science China(Technological Sciences) 2024年第1期67卷 130-142页

作者： xiao Wei hu DeAn hu GuoLiang xiao Yihua Key Laboratory of Conveyance and Equipment Ministry of EducationEast China Jiaotong UniversityNanchang 330013China Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment Ministry of EducationHunan UniversityChangsha 410082China

Soft pneumatic actuators are one of the most promising actuation for soft robots,and great achievements have been *** it remains challenging to endow sensing capabilities to pneumatic actuators,especially for the sensing ability originating directly from the actuator ***,a self-sensing pneumatic torsional actuator(SPTA)is designed based on the electromagnetic induction effect and magnetically responsive *** SPTA can generate feedback voltage and current with the deformation,in which the sensing function comes from its inherent *** investigate the mechanical and electrical characteristics,an experimental platform and a finite element model are established,*** find that the torsion angle and output torque increase in nonlinear with the actuating *** maximum torsion angle is 66.35°,which is 84.34%of that for the actuator fabricated by pure *** maximum output torque(24.9 N mm)improves by 23.19%compared with the actuator made by pure *** regards the electrical characteristics,the maximum feedback voltage and current are 2.90μV and 29.50 nA when the SPTA is actuated by a pressure of−40 *** also demonstrate that the relationship between the torsion angle and the magnetic flux change is approximately ***,the number of turns of wires,magnetic powders contents,and magnetic direction on the feedback voltage and current are *** show that the feedback voltage and current can be enhanced by increasing the number of turns and magnetic powders *** envision that the SPTA would be promising for soft robots to realize their accuracy control and intelligentization.

关键词： pneumatic torsional actuators self-sensing feedback voltage finite element modeling soft robots

Effects of stigma on the quality of lifein patients with epilepsy

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Acta Epileptologica 2024年第2期7卷 110-118页

作者： Chunmei hu Yuping zhao Zheng xiao Department of Neurology The First Affiliated Hospital of Chongqing Medical UniversityNO.1 Youyi Rd.ChongqingYuzhong District 400016China Department of Neurology The People’s Hospital of NanchuanChongqing 408400China

Background This study was aimed to evaluate the stigma and quality of life(QoL)in adult patients with epilepsy(PWEs)and explore the relationship between stigma and *** Two hundred and ninety-eight PWEs admitted to the Epilepsy Center of the First Affiliated Hospitalof Chongqing Medical University during September 2020 and March 2021 were enrolled in this *** participantscompleted self-reported questionnaires including the Stigma Scale for Epilepsy and the Quality of Life in EpilepsyInventory-31(QOLIE-31).Results A total of 146(49%)PWEs reported an experience of *** total score of QOLIE-31 and the individualscores of seven subscales(worry about new seizures,emotion,well-being,energy and fatigue,cognitive impairment,medication effect,and social function)were significantly decreased in these patients(P<0.001).Multivariate stepwiselinear regression analysis showed that the annual household income per capita,the number of antiseizure medica-tions and stigma had statistically significant effects on QoL(P<0.05).Among them,stigma had the most significantnegative *** Nearly half of PWEs have experienced ***,lower household income per capita,and polyp-harmacy treatment are associated with poorer *** has the most obvious negative impact.

关键词： Perceived stigma Epilepsy Quality of life

CRD-CGAN:category-consistent and relativistic constraints for diverse text-to-image generation

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Frontiers of Computer Science 2024年第1期18卷 61-75页

作者： Tao hu Chengjiang LONG Chunxia xiao College of Intelligent Systems Science and Engineering Hubei Minzu UniversityEnshi 445000China School of Computer Science Wuhan UniversityWuhan 430072China Key Laboratory of Performing Art Equipment&System Technology Ministry of Culture and TourismBeijing 100007China Meta Reality Labs BurlingameCA94010USA

Generating photo-realistic images from a text description is a challenging problem in computer *** works have shown promising performance to generate synthetic images conditional on text by Generative Adversarial Networks(GANs).In this paper,we focus on the category-consistent and relativistic diverse constraints to optimize the diversity of synthetic *** on those constraints,a category-consistent and relativistic diverse conditional GAN(CRD-CGAN)is proposed to synthesize K photo-realistic images *** use the attention loss and diversity loss to improve the sensitivity of the GAN to word attention and ***,we employ the relativistic conditional loss to estimate the probability of relatively real or fake for synthetic images,which can improve the performance of basic conditional ***,we introduce a category-consistent loss to alleviate the over-category issues between K synthetic *** evaluate our approach using the Caltech-UCSD Birds-200-2011,Oxford 102 flower and MS COCO 2014 datasets,and the extensive experiments demonstrate superiority of the proposed method in comparison with state-of-the-art methods in terms of photorealistic and diversity of the generated synthetic images.

关键词： text-to-image diverse conditional GAN relativi-stic category-consistent

Performance analysis of a photovoltaic/thermal system with lunar regolith-based thermal storage for the lunar base

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Science China(Technological Sciences) 2024年第4期67卷 1113-1123页

作者： SUN WenGan zhao Bin PEI Yu SHI LingFeng hu MaoBin LI MuJun REN xiao PEI Gang Deep Space Exploration Laboratory Hefei 230026China Department of Thermal Science and Energy Engineering University of Science and Technology of ChinaHefei 230026China Department of Mechanical and Aerospace Engineering University of California San DiegoLa JollaCA 92093USA Department of Precision Machinery and Precision Instrumentation University of Science and Technology of ChinaHefei 230026China College of New Energy China University of Petroleum(East China)Qingdao 266000China

Powering a moon base,especially keeping it warm during the long lunar night,is a big *** paper introduces a photovoltaic/thermal(PV/T)system incorporating regolith thermal storage to solve the challenge of power and heat provision for the lunar base *** vacuum of space around the moon helps this system by reducing heat *** the moon's daytime,the system not only generates electricity but also captures *** stored heat in the regolith is then used at night,reducing the amount of equipment we need to send from *** spectrally selective PV/T panels are designed to absorb a wide range of sunlight(0.3–2.5μm)while minimizing heat loss in the infrared range(3–30μm).Simulation results of the hybrid solar energy system indicate the average value of the overall efficiency is 45.9%,which relatively elevates 56.1%compared to the PV *** launch mass of the proposed PV/T system is only 8.4%of a traditional photovoltaic-lithium battery system with the same amount of energy *** the total specific energy of the proposed system is 7.3 kWh kg^(-1),while that of the photovoltaic-lithium battery system is about 0.3 kWh kg^(-1).In summary,this study proposes an alternative combined heat and electricity supply system for the lunar base,which can greatly reduce the launch mass and free up load for other scientific research equipment.

关键词： in-situ resource utilization(IRSU) regolith thermal storage photovoltaic/thermal(PV/T) spectral selectivity