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铅胁迫下玉米苗期根系性状特征及评价方法

山东农业大学学报（自然科学版） 2024年第2期55卷 193-201页

作者：马兴业李双丹张乐赵永星时振坤陈士林张晓祥河南科技学院农学院现代生物育种河南省协同创新中心河南新乡453003

本文运用水培法(1000 mg·L^(−1)的硝酸铅溶液)在苗期对37份玉米品种进行铅胁迫处理,分别测定其根系总长度、根表面积、平均直径、根体积、根尖数、分叉数、交叉数、根系鲜重、根系干重和根冠比等性状,利用方差分析、主成分隶属函数分... 详细信息

本文运用水培法(1000 mg·L^(−1)的硝酸铅溶液)在苗期对37份玉米品种进行铅胁迫处理,分别测定其根系总长度、根表面积、平均直径、根体积、根尖数、分叉数、交叉数、根系鲜重、根系干重和根冠比等性状,利用方差分析、主成分隶属函数分析、聚类分析、相关性分析、回归分析等进行耐铅性评价及分类。结果表明,在铅胁迫条件下玉米根系性状均受到显著影响,除根系平均直径外,其它根系性状均有一定程度的下降。方差分析表明,根干重处理间呈极显著差异,材料间呈显著差异,其余性状材料间和处理间均呈现极显著差异水平。通过主成分分析和聚类分析,将玉米苗期耐铅性分为6类,即2份高耐品种、3份耐品种、5份中等品种、8份低耐品种、14份敏感品种、5份高敏品种。最后利用相关性和回归分析建立了玉米苗期耐铅性模型:D=−0.287+0.168×根总长度+0.148×根表面积+0.087×根体积+0.041×根尖数+0.125×分叉数+0.119×交叉数+0.138×根系鲜重+0.089×根系干重。本研究综合运用多种分析方法对37份玉米品种进行了苗期耐铅性评价,为修复铅污染土壤修复提供了种质资源。

关键词：玉米耐铅性鉴定隶属函数评价方法

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氮磷钾配施对川贝母产量和品质及养分吸收的影响

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中国土壤与肥料 2024年第5期 54-62页

作者：王新月高旦杨泽敏付邵兵李西文陈士林中国中医科学院中药研究所北京100700 贵州中医药大学药学院贵州贵阳550025 云南中医药大学中药学院云南昆明650500 青海绿康生物开发有限公司青海西宁810003

为探究氮、磷、钾配施对川贝母产量、总生物碱含量和养分吸收的影响,揭示川贝母需肥规律,为川贝母的精细化栽培提供理论指导。以5年生川贝母为试验对象,设氮、磷、钾3个因子和4个浓度水平,共14个处理,测定不同氮、磷、钾浓度配施下的川... 详细信息

为探究氮、磷、钾配施对川贝母产量、总生物碱含量和养分吸收的影响,揭示川贝母需肥规律,为川贝母的精细化栽培提供理论指导。以5年生川贝母为试验对象,设氮、磷、钾3个因子和4个浓度水平,共14个处理,测定不同氮、磷、钾浓度配施下的川贝母产量、总生物碱含量和全株中氮、磷、钾含量;通过回归分析拟合氮、磷、钾用量与川贝母产量及总生物碱含量的肥效模型,结合频率分析法获得5年生川贝母生产最适施肥用量。结果表明,氮、磷、钾配施显著影响川贝母产量和总生物碱含量。随着用量的增加,川贝母产量和总生物碱含量呈先上升后下降的趋势。T6(N、P_(2)O_(5)、K_(2)O分别为24、18、21 g/m^(2))处理和T3(N、P_(2)O_(5)、K_(2)O分别为12、18、21 g/m^(2))处理下的产量与总生物碱含量分别为899.8 g/m^(2)、0.1794%和871.6 g/m^(2)、0.1745%,显著优于其他处理(P磷肥。由氮、磷、钾施用量与产量和总生物碱含量拟合的肥料效应模型的相关性均达到极显著水平(P<0.01)。基于肥效模型和频率分析法,以产量和总生物碱含量为主要考察指标,5年生川贝母的最适施肥方案为N 15.27~21.72 g/m^(2),P_(2)O_(5)11.85~16.08 g/m^(2),K_(2)O 13.82~18.65 g/m^(2)。

关键词：川贝母配方施肥产量肥料效应函数频率分析

NSNO:Neumann Series Neural Operator for Solving Helmholtz Equations in Inhomogeneous Medium

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Journal of Systems Science & Complexity 2024年第2期37卷 413-440页

作者： chen Fukai LIU Ziyang lin Guochang chen Junqing shi Zuoqiang Department of Mathematical Sciences Tsinghua UniversityBeijing 100084China Yau Mathematical Sciences Center Tsinghua UniversityBeijing 100084China Yanqi Lake Beijing Institute of Mathematical Sciences and Applications Beijing 101408China

In this paper,the authors propose Neumann series neural operator(NSNO)to learn the solution operator of Helmholtz equation from inhomogeneity coefficients and source terms to *** equation is a crucial partial differential equation(PDE)with applications in various scientific and engineering ***,efficient solver of Helmholtz equation is still a big challenge especially in the case of high ***,deep learning has shown great potential in solving PDEs especially in learning solution *** by Neumann series in Helmholtz equation,the authors design a novel network architecture in which U-Net is embedded inside to capture the multiscale *** experiments show that the proposed NSNO significantly outperforms the state-of-the-art FNO with at least 60%lower relative L^(2)-error,especially in the large wavenumber case,and has 50%lower computational cost and less data ***,NSNO can be used as the surrogate model in inverse scattering *** tests show that NSNO is able to give comparable results with traditional finite difference forward solver while the computational cost is reduced tremendously.

关键词： Helmholtz equation inverse problem neumann series neural network solution operator

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Intra-Oceanic Subduction Termination and Reinitiation of the Eastern Neo-Tethys in Myanmar

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Journal of Earth Science 2024年第3期35卷 1053-1058页

作者： Yi chen Qinghua Zhang lin chen Kaihui shi Kyaing Sein State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Myanmar Geosciences Society Hlaing University CampusYangon 11062Myanmar

Subduction initiation and termination represent the birth and death of a subduction zone and are inevitable elements of terrestrial plate *** evidence demonstrates that subduction zone processes did not operate continuously and might involve multiple initiation and termination stages(Stern,2004),characterized by sustained subduction-zone death and *** geological and numerical studies focus on subduction initiation processes/mechanisms(see reviews in Yang,2022);however,subduction termination is often studied numerically at continental margins(Gerya,2022).How subduction termination proceeds in intra-oceanic settings remains enigmatic due to lacking geological records.

关键词： Eastern terrestrial continental

High-dimensional uncertainty quantification of projectile motion in the barrel of a truck-mounted howitzer based on probability density evolution method

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Defence Technology（防务技术） 2024年第2期32卷 209-221页

作者： Mingming Wang linfang Qian Guangsong chen Tong lin Junfei shi shijie Zhou Nanjing University of Science and Technology Nanjing 210094JiangsuChina Northwest Institute of Mechanical and Electrical Engineering Xianyang 712099ShaanxiChina Nanjing Vocational University of Industry Technology Nanjing 210023JiangsuChina

This paper proposed an efficient research method for high-dimensional uncertainty quantification of projectile motion in the barrel of a truck-mounted ***,the dynamic model of projectile motion is established considering the flexible deformation of the barrel and the interaction between the projectile and the ***,the accuracy of the dynamic model is verified based on the external ballistic projectile attitude test ***,the probability density evolution method(PDEM)is developed to high-dimensional uncertainty quantification of projectile *** engineering example highlights the results of the proposed method are consistent with the results obtained by the Monte Carlo Simulation(MCS).Finally,the influence of parameter uncertainty on the projectile disturbance at muzzle under different working conditions is *** results show that the disturbance of the pitch angular,pitch angular velocity and pitch angular of velocity decreases with the increase of launching angle,and the random parameter ranges of both the projectile and coupling model have similar influence on the disturbance of projectile angular motion at muzzle.

关键词： Truck-mounted howitzer Projectile motion Uncertainty quantification Probability density evolution method

Immune checkpoint inhibitor-associated gastritis:Patterns and management

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World Journal of Gastroenterology 2024年第14期30卷 1941-1948页

作者： Jing lin Zhong-Qiao lin shi-cheng Zheng Yu chen Department of Medical Oncology Clinical Oncology School of Fujian Medical UniversityFujian Cancer HospitalFuzhou 350000Fujian ProvinceChina Phase I Clinical Trial Ward Clinical Oncology School of Fujian Medical UniversityFujian Cancer HospitalFuzhou 350000Fujian ProvinceChina School of Basic Medical Sciences Fujian Medical UniversityFuzhou 350000Fujian ProvinceChina

Immune checkpoint inhibitors(ICIs)are widely used due to their effectiveness in treating various ***-related adverse events(irAEs)are defined as adverse effects resulting from ICI *** irAEs are a common type of irAEs characterized by intestinal side effects,such as diarrhea and colitis,which may lead to the cessation of *** irAE gastritis is rarely reported,it may lead to serious complications such as ***,irAE gastritis is often difficult to identify early due to its diverse *** steroid hormones and immunosuppressants are commonly used to reverse irAEs,the best regimen and dosage for irAE gastritis remains *** addition,the risk of recurrence of irAE gastritis after the reuse of ICIs should be *** this editorial,strategies such as early identification,pathological diagnosis,mana-gement interventions,and immunotherapy rechallenge are discussed to enable clinicians to better manage irAE gastritis and improve the prognosis of these patients.

关键词： Immunotherapy Immune checkpoint inhibitor Immune-related adverse events Immune checkpoint inhibitor-related gastritis

Adaptive Space Expansion for Fast Motion Planning

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IEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1499-1514页

作者： Shenglei shi Jiankui chen State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The sampling process is very inefficient for sam-pling-based motion planning algorithms that excess random sam-ples are generated in the planning *** this paper,we pro-pose an adaptive space expansion(ASE)approach which belongs to the informed sampling category to improve the sampling effi-ciency for quickly finding a feasible *** ASE method enlarges the search space gradually and restrains the sampling process in a sequence of small hyper-ellipsoid ring subsets to avoid exploring the unnecessary ***,for a con-structed small hyper-ellipsoid ring subset,if the algorithm cannot find a feasible path in it,then the subset is ***,the ASE method successively does space exploring and space expan-sion until the final path has been ***,we present a particular construction method of the hyper-ellipsoid ring that uniform random samples can be directly generated in *** last,we present a feasible motion planner BiASE and an asymptoti-cally optimal motion planner BiASE*using the bidirectional exploring method and the ASE *** demon-strate that the computation speed is much faster than that of the state-of-the-art *** source codes are available at https://***/shshlei/ompl.

关键词： Adaptive space expansion(ASE) hyper-ellipsoid ring informed sampling motion planning.

Multi-modal knowledge graph inference via media convergence and logic rule

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CAAI Transactions on Intelligence Technology 2024年第1期9卷 211-221页

作者： Feng lin Dongmei Li Wenbin Zhang Dongsheng shi Yuanzhou Jiao Qianzhong chen Yiying lin Wentao Zhu School of Information Science and Technology Beijing Forestry UniversityBeijingChina Engineering Research Center for Forestry-oriented Intelligent Information Processing National Forestry and Grassland AdministrationBeijingChina Michigan Technological University HoughtonMichiganUSA

Media convergence works by processing information from different modalities and applying them to different *** is difficult for the conventional knowledge graph to utilise multi-media features because the introduction of a large amount of information from other modalities reduces the effectiveness of representation learning and makes knowledge graph inference less *** address the issue,an inference method based on Media Convergence and Rule-guided Joint Inference model(MCRJI)has been *** authors not only converge multi-media features of entities but also introduce logic rules to improve the accuracy and interpretability of link ***,a multi-headed self-attention approach is used to obtain the attention of different media features of entities during semantic ***,logic rules of different lengths are mined from knowledge graph to learn new entity ***,knowledge graph inference is performed based on representing entities that converge multi-media *** experimental results show that MCRJI outperforms other advanced baselines in using multi-media features and knowledge graph inference,demonstrating that MCRJI provides an excellent approach for knowledge graph inference with converged multi-media features.

关键词： logic rule media convergence multi-modal knowledge graph inference representation learning

Polysaccharide of Alocasia cucullata Exerts Antitumor Effect by Regulating Bcl-2, Caspase-3 and ERK1/2 Expressions during Long-Time Administration

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Chinese Journal of Integrative Medicine 2024年第1期30卷 52-61页

作者： ZHOU Qi-chun XIAO shi-lin lin Ru-kun LI Chan chen Zhi-jie chen Yi-fei LUO Chao-hua MO Zhi-xian lin Ying-bo School of Traditional Chinese Medicine Southern Medical UniversityGuangzhou(510515)China Clinical and Basic Research Team of TCM Prevention and Treatment of Non-Small Cell Lung Cancer the Second Clinical College of Guangzhou University of Chinese MedicineGuangzhou(510120)China Department of Chinese Medicine Zhujiang Hospital Affiliated to Southern Medical UniversityGuangzhou(510282)China Department of Pharmacy Jiangmen Central HospitalJiangmen(529000)China

Objective: To study the in vitro and in vivo antitumor effects of the polysaccharide of Alocasia cucullata(PAC) and the underlying mechanism. Methods: B16F10 and 4T1 cells were cultured with PAC of 40 μg/m L, and PAC was withdrawn after 40 days of administration. The cell viability was detected by cell counting kit-8. The expression of Bcl-2 and Caspase-3 proteins were detected by Western blot and the expressions of ERK1/2 mRNA were detected by quantitative real-time polymerase chain reaction(qRT-PCR). A mouse melanoma model was established to study the effect of PAC during long-time administration. Mice were divided into 3 treatment groups: control group treated with normal saline, positive control group(LNT group) treated with lentinan at 100 mg/(kg·d), and PAC group treated with PAC at 120 mg/(kg·d). The pathological changes of tumor tissues were observed by hematoxylin-eosin staining. The cell apoptosis of tumor tissues was detected by TUNEL staining. Bcl-2 and Caspase-3 protein expressions were detected by immunohistochemistry, and the expressions of ERK1/2, JNK1 and p38 mRNA were detected by qRT-PCR. Results: In vitro, no strong inhibitory effects of PAC were found in various tumor cells after 48 or 72 h of administration. Interestingly however, after 40 days of cultivation under PAC, an inhibitory effect on B16F10 cells was found. Correspondingly, the long-time administration of PAC led to downregulation of Bcl-2 protein(P <0.05), up-regulation of Caspase-3 protein(P<0.05) and ERK1 mRNA(P<0.05) in B16F10 cells. The above results were verified by in vivo experiments. In addition, viability of B16F10 cells under long-time administration culture in vitro decreased after drug withdrawal, and similar results were also observed in 4T1 cells. Conclusions: Long-time administration of PAC can significantly inhibit viability and promote apoptosis of tumor cells, and had obvious antitumor effect in tumor-bearing mice.

关键词： polysaccharide of Alocasia cucullata tumor cells Bcl-2 Caspase-3 ERK1/2 Chinese medicine