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Optimizing canopy-spacing configuration increases soybean yield under high planting density

Crop Journal 2025年第1期13卷 233-245页

作者： Li, Ruidong xu, Cailong Wu, Zongsheng xu, Yifan Sun, Shi Song, Wenwen Wu, Cunxiang Institute of Crop Sciences Chinese Academy of Agricultural Sciences/National soybean Industrial Technology R & D Center Beijing 100081 China

Dense cropping increases crop yield but intensifies resource competition, which reduces single plant yield and limits potential yield growth. Optimizing canopy spacing could enhance resource utilization, support crop morphological development and increase yield. Here, a three-year study was performed to verify the feasibility of adjusting row spacing to further enhance yield in densely planted soybeans. Of three row-spacing configurations (40–40, 20–40, and 20–60 cm) and two planting densities (normal 180,000 plants ha−1 and high 270,000 plants ha−1). The differences in canopy structure, plant morphological development, photosynthetic capacity and their impact on yield were analyzed. Row spacing configurations have a significant effect on canopy transmittance (CT). The 20–60 cm row spacing configuration increased CT and creates a favorable canopy light environment, in which plant height is reduced, while branching is promoted. This approach reduces plant competition, optimizes the developments of leaf area per plant, specific leaf area, leaf area development rate, leaf area duration and photosynthetic physiological indices (Fv/Fm, ETR, Pn). The significant increase of 11.9%–34.2% in canopy apparent photosynthesis (CAP) is attributed to the significant optimization of plant growth and photosynthetic physiology through CT, an important contributing factor to yield increases. The yield in the 20–60 cm treatment is 4.0% higher than in equidistant planting under normal planting density, but 5.9% under high density, primarily driven by CAP and pod number. These findings suggest that suitable row spacing configurations optimize the light environment for plants, promote source-sink transformation in soybeans, and further improve yield. In practice, a 20–60 cm row spacing configuration could be employed for high-density soybean planting to achieve a more substantial yield gain. © 2024 Crop Science Society of China and In

关键词： Canopy transmittance Planting density Row-spacing configuration Soybean Yield

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Recent progress and perspectives on highly-safe and energy-dense solid-state Li-CO_(2) batteries

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Science Bulletin 2025年第2期70卷 135-139页

作者： Yunyun xu Zichen xu Sang-Young Lee Zhong-Shuai Wu State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Department of Chemical and Biomolecular Engineering Yonsei UniversitySeoul 03722Republic of Korea Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China

Li-CO_(2)batteries are highly anticipated as promising candidates for advanced electrochemical energy storage systems owing to their high theoretical specific energy of 1876 Wh kg^(-1),based on the discharge products of Li_(2)CO_(3)and C,their environmentally benign CO_(2)utilization [1].Since CO_(2)is the main component of the atmosphere on Mars,Li-CO_(2)batteries can serve as an excellent power source for Mars exploration ***,several key issues remain unresolved,such as the slow kinetics of CO_(2)reduction reaction(CRR) and CO_(2)evolution reaction(CER),the severe side reaction between Li with CO_(2),and the risk of the electrolyte combustion due to thermal runaway,all of which hinder the practical application of Li-CO_(2)batteries.

关键词： energy hinder electrolyte

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General and Specific Combining Abilities of Pacific Oyster(Crassostrea gigas)and Fujian Oyster(***)for Growth,Survival and Thermal Tolerance of Their Reciprocal Hybrids

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Journal of Ocean University of China 2025年第1期24卷 238-248页

作者： JIANG Gaowei xu Chengxun LI Qi Key Laboratory of Mariculture Ministry of EducationOcean University of ChinaQingdao 266003China Laboratory for Marine Fisheries Science and Food Production Processes Laoshan LaboratoryQingdao 266237China

A crossbreeding program was established in 2019 to address the declining Crassostrea gigas harvests caused by Pacific Oyster Mortality Syndrome(POMS).As a part of the program,this study was performed to estimate the genetic structure underlying phenotypic *** complete diallel crossings of *** and ***,comprising 60 full-sib families,were used to evaluate the general combining ability(GCA)and specific combining ability(SCA),as well as genotype and environment interactions for shell height(SH),summer survival(SS),and thermal tolerance(TT)of reciprocal hybrids GA(***♀×***♂)and AG(***♀×***♂)grown in Rongcheng and Rushan,Shandong Province,*** results suggested that heterosis of the reciprocal hybrids was evident for SH,SS,and *** hybrid GA had larger heterosis than AG in both testing environments,and can be a potential donor in the breeding *** male *** had better GCA for SH in Rongcheng,whereas male *** was a good general combiner for SS and TT in both Rongcheng and *** estimate of SCA was much higher than GCA for SH and lower than GCA for *** harness both additive and non-additive genetic effects,combination breed-ing could be taken to develop hybrid varieties possessing both thermal tolerance and fast-growing *** positive correlations between SH and TT suggested that these traits could be improved *** significant G×E interactions demonstrated the importance to undertake site-specific breeding programs in different ***,this study can provide essential information for developing crossbreeding strategies for the oyster farming industry.

关键词： crossbreeding combining ability genotype×environment interaction Crassostrea gigas C.angulata

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小儿先天性梨状窝瘘影像学表现

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中国医学影像技术 2021年第4期37卷 517-521页

作者：徐守军干芸根杨春兰杜端明言伟强刘龙平卢宁赵彩蕾罗娜深圳市儿童医院放射科广东深圳518026 深圳市儿童医院血液肿瘤科广东深圳518026 深圳大学第一附属医院深圳市第二人民医院介入治疗科广东深圳518035 北京大学深圳医院医学影像科广东深圳518036

目的观察小儿先天性梨状窝瘘(CPSF)影像学表现。方法22例CPSF患儿(2例新生儿),接受平扫及增强CT(n=20)、平扫及增强MR(n=2)及X线造影(n=3),其中2例先后接受CT及MR检查,1例先后接受CT及X线造影。结果22例中,CPSF位于左侧21例、右侧1例。... 详细信息

目的观察小儿先天性梨状窝瘘(CPSF)影像学表现。方法22例CPSF患儿(2例新生儿),接受平扫及增强CT(n=20)、平扫及增强MR(n=2)及X线造影(n=3),其中2例先后接受CT及MR检查,1例先后接受CT及X线造影。结果22例中,CPSF位于左侧21例、右侧1例。新生儿CPSF以颈部含气囊性包块伴气管受压、变形、狭窄为特征性CT、MRI表现。儿童CPSF的主要CT和MRI表现为梨状窝变小,甲状腺变形、肿大、密度减低,甲状腺上极气泡征等;X线造影可见经梨状窝延伸的瘘道或瘘管影。结论小儿CPSF影像学表现具有一定特征性,有助于诊断。

关键词：先天性畸形先天性梨状窝瘘体层摄影术,X线计算机磁共振成像

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不同典型栽培模式下空心菜对砷和矿质元素的富集特征差异研究

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河南农业科学 2022年第11期51卷 109-118页

作者：吴志超杨秀丽李富荣徐守俊石含之杜瑞英王旭广东省农业科学院农业质量标准与监测技术研究所广东广州510640 华中农业大学资源与环境学院湖北武汉430070

为研究不同典型栽培模式下空心菜对砷(As)和矿质元素的富集特征差异,采用大田原位试验,研究了受As污染耕地(68.9 mg/kg)上28个空心菜品种在水生和旱生2种栽培模式下其可食部位对As和Ca、Mg、Fe、Mn、Cu、Zn的富集规律。结果表明,在不同... 详细信息

为研究不同典型栽培模式下空心菜对砷(As)和矿质元素的富集特征差异,采用大田原位试验,研究了受As污染耕地(68.9 mg/kg)上28个空心菜品种在水生和旱生2种栽培模式下其可食部位对As和Ca、Mg、Fe、Mn、Cu、Zn的富集规律。结果表明,在不同栽培模式下,空心菜对As和矿质元素富集存在显著差异,具体表现:空心菜可食部位中As和Fe、Mn、Cu、Zn含量呈现水生栽培模式高于旱生栽培模式,而Ca、Mg含量则为水生栽培模式低于旱生栽培模式。水生栽培模式下As和Fe、Mn、Cu、Zn的平均富集系数分别为0.043和0.002、0.067、0.401、0.052,旱生栽培模式下为0.004和0.001、0.042、0.093、0.040。由此可见,水生栽培模式下空心菜对As和Fe、Mn、Cu、Zn富集效率明显均高于旱生栽培模式,而对于Ca、Mg富集效率呈现相反的趋势。空心菜对As和矿质元素的富集能力存在明显的种间差异,具体表现:水生栽培模式下,28个空心菜品种可食部位中As、Ca、Mg、Fe、Mn、Cu、Zn含量最高品种分别比最低品种高出26.0、1.8、1.3、4.1、1.4、53.7、0.9倍,而旱生栽培模式分别为11.0、1.4、1.0、8.4、2.9、7.8、1.1倍。依据聚类分析结果可得,同一类群空心菜品种因栽培模式的不同对As的富集效率呈现不一致,表明筛选As低积累空心菜品种应充分考虑栽培模式这一影响因素。根据GB 2762—2017中蔬菜As的限量标准(0.5 mg/kg),水生模式下28个空心菜品种As超标率为89.3%,旱生模式下为7.1%。综合分析,As污染土壤上,水生栽培模式有利于空心菜对As和微量元素富集,旱生栽培模式则有利于中量元素的富集。

关键词：空心菜砷矿质元素栽培模式富集

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High-precision tip positioning composite feedforward control of linear colocated motion systems with Bi-Loop iterative feedforward tuning

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Science China(Technological Sciences) 2025年第2期68卷 153-166页

作者： Junyu HU Yourui TAO Shanhu LI xu HAN College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of TechnologyTianjin 300130China

To enhance the tip positioning accuracy and robustness against disturbances of linear colocated motion systems,a novel composite feedforward(COMFF)control with Bi-Loop iterative feedforward tuning(IFFT)is *** tip positioning error consists of the coupled tip residual vibration and linear motor tracking *** the influence of nonlinear friction and load flexibility,the topology of COMFF is designed as decoupled structures so that COMFF can suppress the tip residual vibration and compensate for the linear motor tracking error ***,Bi-Loop IFFT is built to improve the robustness of COMFF in high-precision motor tracking *** the state space of the linear motor tracking error based on the projection theorem,two loops are performed in parallel along the iteration *** is the P-type iteration loop that drives linear motor tracking errors to converge to the zero *** other is the observation loop constructed by the recursive least square with forgetting factors to accelerate the P-type iteration *** by the P-type iteration loop with the aid of the observation loop,the proposed COMFF is integrated with fast convergence and high robustness when confronted with model *** effectiveness of the proposed COMFF combined with Bi-Loop IFFT is validated by experiments.

关键词： composite feedforward(COMFF)control Bi-Loop iterative feedforward tuning(Bi-Loop IFFT) colocated motion systems nonlinear friction flexible load

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蓖麻地上部主茎器官形态建成的预测模型

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作物杂志 2021年第1期 193-199页

作者：徐寿军王磊德木其格王金波齐海祥朱国立内蒙古民族大学农学院内蒙古通辽028043 内蒙古自治区高校蓖麻产业工程技术研究中心内蒙古通辽028043 内蒙古自治区蓖麻育种重点实验室内蒙古通辽028043 内蒙古自治区蓖麻产业协同创新培育中心内蒙古通辽028043 内蒙古通辽市农业科学研究院内蒙古通辽028015

以通蓖9号、通蓖10号、通蓖11号和通蓖13号为试验材料,在系统观测的基础上,构建了蓖麻主茎茎秆、叶片、果穗和蒴果等地上部器官的形态建成预测模型。用生理发育时间表达模型尺度,以品种遗传参数为基础,通过计算获得其他模型参数,以生理... 详细信息

以通蓖9号、通蓖10号、通蓖11号和通蓖13号为试验材料,在系统观测的基础上,构建了蓖麻主茎茎秆、叶片、果穗和蒴果等地上部器官的形态建成预测模型。用生理发育时间表达模型尺度,以品种遗传参数为基础,通过计算获得其他模型参数,以生理发育日衡量茎秆、叶片、果穗和蒴果的生长进程与生长次序,用最小含氮量、最大含氮量和临界含氮量订正氮肥效应。不同品种的检验结果表明,节间长、各节直径、叶长、叶宽、穗长、蒴果长和蒴果直径的模拟误差分别为0.10~0.72、0.03~0.16、0.19~0.73、0.30~0.60、0.89~1.85、0.11~0.21和0.05~0.12cm,RMSE分别为0.14~0.60、0.06~0.11、0.47、0.38、1.42、0.16和0.07cm。模型表现出较好的预测性和可靠性。

关键词：蓖麻器官形态建成模拟

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Lenalidomide regulates the CCL21/CCR7/ERK1/2 axis to inhibit migration and proliferation in diffuse large B-cell lymphoma

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Oncology Research 2025年第1期33卷 199-212页

作者： WEN YANG BIN TANG DAN xu WENXIU YANG Department of Pathology Guizhou Medical UniversityThe Affiliated Hospital of Guizhou Medical UniversityGuiyang550004China

Background:The prognostic significance of the chemokine receptor CCR7 in diffuse large B-cell lymphoma(DLBCL)has been reported ***,the detailed mechanisms of CCR7 in DLBCL,particularly regarding its interaction with lenalidomide treatment,are not fully ***:Our study utilized bioinformatics approaches to identify hub genes in SU-DHL-2 cell lines treated with lenalidomide compared to control *** data and clinical information from 122 patients with DLBCL were analyzed to assess the correlation of CCR7 and p-ERK1/2 expression with the prognosis of ***,in vitro and in vivo experiments were conducted to clarify the role of CCR7 in the response of DLBCL to lenalidomide ***:Our bioinformatics analysis pinpointed CCR7 as a hub gene in the context of lenalidomide treatment in ***,31.14%and 36.0%(44/122)of DLBCL cases showed positive expression for CCR7 and ERK1/2 respectively,establishing them as independent prognostic factors for adverse outcomes in DLBCL via multivariate Cox regression ***,our studies demonstrated that the external application of the protein CCL21 promoted proliferation,migration,invasion,and activation of the ERK1/2 pathway in SU-DHL-2 and OCI-LY3 cell lines with high levels of CCR7 *** effect was mitigated by CCR7 silencing through siRNA,application of ERK inhibitors,or lenalidomide *** vivo experiments reinforced the efficacy of lenalidomide,significantly reducing tumor growth rate,tumor mass,serum total LDH levels,and expression of CCR7 and p-ERK1/2 in a SUDHL-2 xenograft model in nude mice(p<0.05).Conclusion:Our study clarifies the potential role of the CCL21/CCR7/ERK1/2 axis in the therapeutic effects of lenalidomide in DLBCL treatment.

关键词： CCR7 CCL21 ERK1/2 Lenalidomide Diffuse large B-cell lymphoma(DLBCL)

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Bearing Fault Diagnosis Based on the Markov Transition Field and SE-IShufflenetV2 Model

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Structural Durability & Health Monitoring 2025年第1期19卷 125-144页

作者： Chaozhi Cai Tiexin xu Jianhua Ren Yingfang xue School of Mechanical and Equipment Engineering Hebei University of EngineeringHandan056038China

A bearing fault diagnosis method based on the Markov transitionﬁeld(MTF)and SEnet(SE)-IShufﬂenetV2 model is proposed in this paper due to the problems of complex working conditions,low fault diagnosis accuracy,and poor generalization of rolling ***,MTF is used to encode one-dimensional time series vibration sig-nals and convert them into time-dependent and unique two-dimensional feature ***,the generated two-dimensional dataset is fed into the SE-IShufﬂenetV2 model for training to achieve fault feature extraction and classiﬁ*** paper selects the bearing fault datasets from Case Western Reserve University and Paderborn University to experimentally verify the effectiveness and superiority of the proposed *** generalization performance of the proposed method is tested under the variable load condition and different signal-to-noise ratios(SNRs).The experimental results show that the average accuracy of the proposed method under different working conditions is 99.2%without adding *** accuracy under different working conditions from 0 to 1 HP is 100%.When the SNR is 0 dB,the average accuracy of the proposed method can still reach 98.7%under varying working ***,the bearing fault diagnosis method proposed in this paper is characterized by high accuracy,strong anti-noise ability,and ***,the proposed method can also overcome the inﬂuence of variable working conditions on diagnosis accuracy,providing method support for the accurate diagnosis of bearing faults under strong noise and variable working conditions.

关键词： Bearings Markov transitionﬁeld SE-IShufﬂenetV2

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小儿肾透明细胞肉瘤及肾恶性横纹肌样瘤临床特征和CT表现

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临床放射学杂志 2024年第5期43卷 811-818页

作者：徐守军杨春兰曹娟谢丽春刘龙平裴妮慧罗娜刘劼深圳市儿童医院放射科 518026 深圳市儿童医院血液肿瘤科 518026 深圳市儿童医院病理科 518026 广州医科大学附属第三医院儿科 510530

目的探讨小儿肾透明细胞肉瘤(CCSK)和肾恶性横纹肌样瘤(MRTK)的临床特征和CT表现。方法回顾性分析4例CCSK和4例MRTK患儿临床资料。8例术前均行CT平扫及增强扫描。结果 4例CCSK,左肾1例,右肾3例;4例MRTK,左肾3例,右肾1例。病灶均呈类圆... 详细信息

目的探讨小儿肾透明细胞肉瘤(CCSK)和肾恶性横纹肌样瘤(MRTK)的临床特征和CT表现。方法回顾性分析4例CCSK和4例MRTK患儿临床资料。8例术前均行CT平扫及增强扫描。结果 4例CCSK,左肾1例,右肾3例;4例MRTK,左肾3例,右肾1例。病灶均呈类圆形。瘤体较大,CCSK病灶最大径线为52~120 mm,平均(81±25)mm;MRTK病灶最大径线为41~81 mm,平均(62±15)mm。4例CCSK主要表现为残肾形态存在,肾组织环绕病灶;3例病灶位于肾盂内,肾盂变形、扩大,1例突破肾盂向外生长;CT平扫呈等或稍低密度影,出血较多时可表现为不均匀稍高密度影。增强扫描轻-中度不均匀渐进性强化。4例均见坏死/囊变及出血;1例见包膜下积液/血,即“新月征”;未见钙化及骨质破坏;1例肺及淋巴结转移。4例MRTK中3例残肾形态消失,仅1例存在;残肾肾盂均受压、推移;病灶为囊实性,分界不清,呈渐变性改变,表现为“融冰征”。增强扫描轻-中度不均匀渐进性强化。4例病灶均有坏死/囊变;3例内见高密度出血影;2例含有钙化;4例出现“新月征”;均未见骨质破坏;1例脑转移,1例肺及淋巴结转移,1例下腔静脉及左肾静脉见瘤栓。结论小儿CCSK和MRTK发病率较低,CT表现与小儿其他常见肾恶性肿瘤具有许多相似性,以及对其征象认识不足是误诊的主要原因。全面了解CCSK及MRTK的影像学表现,分析误诊原因,有助于准确诊断。

关键词：肾透明细胞肉瘤肾恶性横纹肌样瘤体层摄影术 X线计算机误诊分析

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