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Two-stage seedling cultivation method for sweet peppers combining closed plant factory and solar greenhouse

International Journal of Agricultural and Biological Engineering 2023年第6期16卷 56-66页

作者： Hongbo Cui Fang Ji Yanni Liu zhengyang luo Xiufeng Wang Jianfeng Wang Key Laboratory of Facility Vegetable of Jilin Province Jilin Academy of Vegetable and Flower SciencesChangchun 130119China Key Laboratory of Agricultural Engineering in Structure and Environment of MARA College of Water Resources&Civil EngineeringChina Agricultural UniversityBeijing 100083China College of Horticulture Jilin Agricultural UniversityChangchun 130033China

This study introduced a two-stage cultivation method for sweet pepper seedlings, integrating the strengths of a closed plant factory and solar greenhouse, to mitigate the environmental constraints in Northeast China during the early spring season. In the first stage, seedlings were cultivated in a closed plant factory, followed by a second stage in a solar greenhouse. Four treatments- T1 (9 and 36 d), T2 (12 and 33 d), T3 (15 and 30 d), and T4 (18 and 27 d) - were designed for the first and second stages, respectively, with solar greenhouse-only approach serving as the control (CK). The findings reveal that the two-stage methodology significantly outperformed the control across multiple metrics, including seedling health index, chlorophyll content, photosynthetic capacity, yield, etc. Specifically, T3 emerged as optimal, boosting the health index by 38.59%, elevating chlorophyll content by 39.61%, increasing net photosynthesis by 34.61%, and augmenting yield per plant by 40.67%. Additionally, T3 expedited the time to harvest by 25 d compared to the control. Although the seedling cost for T3 was 0.12 RMB yuan higher, the benefits offset the additional investment. In conclusion, the two-stage cultivation method effectively leverages the advantages of both closed-plant factories and solar greenhouses, resulting in superior seedling quality compared to using only solar greenhouses. It offers a practical and economically viable solution for enhancing the quality and yield of sweet pepper seedlings, thus contributing to the progress in the field of facility seedling cultivation research.

关键词： two-stage seedling cultivation sweet peppers closed plant factory solar greenhouse

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GPS: graph contrastive learning via multi-scale augmented views from adversarial pooling

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Science China(Information Sciences) 2025年第1期 145-158页

作者： Wei JU Yiyang GU zhengyang MAO Ziyue QIAO Yifang QIN Xiao luo Hui XIONG Ming ZHANG School of Computer Science National Key Laboratory for Multimedia Information ProcessingPeking University Artificial Intelligence Thrust The Hong Kong University of Science and Technology Department of Computer Science University of California

Self-supervised graph representation learning has recently shown considerable promise in a range of fields, including bioinformatics and social networks. A large number of graph contrastive learning approaches have shown promising performance for representation learning on graphs, which train models by maximizing agreement between original graphs and their augmented views(i.e., positive views). Unfortunately, these methods usually involve pre-defined augmentation strategies based on the knowledge of human experts. Moreover, these strategies may fail to generate challenging positive views to provide sufficient supervision signals. In this paper, we present a novel approach named graph pooling contrast(GPS) to address these *** by the fact that graph pooling can adaptively coarsen the graph with the removal of redundancy, we rethink graph pooling and leverage it to automatically generate multi-scale positive views with varying emphasis on providing challenging positives and preserving semantics, i.e., strongly-augmented view and weakly-augmented view. Then, we incorporate both views into a joint contrastive learning framework with similarity learning and consistency learning, where our pooling module is adversarially trained with respect to the encoder for adversarial robustness. Experiments on twelve datasets on both graph classification and transfer learning tasks verify the superiority of the proposed method over its counterparts.

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飞秒激光辅助与传统超声乳化术后黄斑和视盘区神经纤维层厚度及血管密度变化

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国际眼科杂志 2024年第9期24卷 1461-1465页

作者：周梦兰徐正东兰长骏杨月罗正阳苗壮李彪成都东区爱尔眼科医院中国四川省成都市610056 川北医学院附属医院眼科中国四川省南充市637000 川北医学院眼视光医学院中国四川省南充市637000

目的:运用光学相干断层扫描血管成像(OCTA)观察飞秒激光辅助与传统超声乳化白内障术后患者黄斑和视盘区神经纤维层厚度及血管密度变化情况。方法:前瞻性非随机对照研究。纳入2022-07/10于成都东区爱尔眼科医院诊断为年龄相关性白内障患... 详细信息

目的:运用光学相干断层扫描血管成像(OCTA)观察飞秒激光辅助与传统超声乳化白内障术后患者黄斑和视盘区神经纤维层厚度及血管密度变化情况。方法:前瞻性非随机对照研究。纳入2022-07/10于成都东区爱尔眼科医院诊断为年龄相关性白内障患者并住院接受手术治疗的患者65例85眼,根据患者自愿选择手术方式,分为飞秒激光辅助组23例30眼,传统超声乳化组42例55眼。于术前,术后1 d,1 mo均行OCTA检查,比较两组患者黄斑和视盘区神经纤维层厚度、血管密度及血流灌注变化。结果:两组患者术后1 mo BCVA均较术前改善,眼压均较术前降低(均P0.05);传统超声乳化组视盘区神经纤维层厚度、黄斑和视盘区血管密度及血流灌注与术前比较均有差异(均P0.05)。两组患者手术前后黄斑中心凹无血管区域(FAZ)面积比较均无差异(均P>0.05)。结论:飞秒激光辅助白内障手术对眼底视网膜血管影响更小。

关键词：飞秒激光超声乳化白内障手术光学相干断层扫描血管成像黄斑和视盘区血管密度

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江南林场次生林红松更新效果的研究

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林业科学 1988年第2期 223-227页

作者：张国连李平罗正阳吉林市林业科学研究所吉林省磐石县江南林场

一、自然概况江南林场位于吉林省磐石县东南。海拔286—840m,坡度5—25°,土壤为暗棕色森林土,土层厚度15—40cm,50多年前境内原生植被为地带性阔叶红松林。现有林除部分解放后营造的红松、落叶松人工林外,几乎全为屡遭破坏届演替而成... 详细信息

一、自然概况江南林场位于吉林省磐石县东南。海拔286—840m,坡度5—25°,土壤为暗棕色森林土,土层厚度15—40cm,50多年前境内原生植被为地带性阔叶红松林。现有林除部分解放后营造的红松、落叶松人工林外,几乎全为屡遭破坏届演替而成的次生植被。主要树种为山杨、核桃楸、水曲柳、椴树、黄波罗、柞树、(木色)树和榆树等阔叶树种。经营区属湿润型温带大陆性气候,无霜期140天,年平均温度3.5℃,7月份平均气温20.4℃,1月份平均气温-20.8℃,年平均降雨量787mm。

关键词：红松林地株数朝鲜松农业用地次生林红松幼树林场

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Crafting host materials for narrowband blue OLEDs with low efficiency roll-off by the medium-ring strategy

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Science China Chemistry 2024年第10期67卷 3265-3270页

作者： Yuanyuan Bao Anping luo Jingbo Lan Junjie Liu zhengyang Bin Jingsong You Key Laboratory of Green Chemistry and Technology of Ministry of Education College of ChemistrySichuan UniversityChengdu 610064China

The pursuit of high-performance narrowband blue organic light-emitting diodes(OLEDs)is of paramount importance in both academic research and industrial *** obvious strides have been made in the design of narrowband blue emitters,the development of appropriate host materials has evidently trailed ***,we introduce a medium-ring strategy for crafting host molecules based on the heptagonal tribenzo[b,d,f]azepine(TBA)*** twisted three-dimensional(3D)architecture of the TBA framework not only endows the host molecules with fast hole-transporting pathways but also effectively reduces exciton *** with two TBA units,DTBA,synthesized with ease,demonstrates a huge horizontal orientation factor(Θ//)of 93.5%and a broad emission spectrum for accelerating the energy transfer process in the emitting layer,which contributes to enhancing device *** have fabricated high-performance narrowband blue OLEDs using DTBA as the host,FIrpic as the phosphor sensitizer,and the widely used boron-nitrogen-containing multiple resonance emitter *** devices exhibit a maximum external quantum efficiency(EQEmax)as high as 31.0%with an impressively lowefficiency *** at a high luminance level of 10,000 cd m^(-2),the EQE value remains noteworthy at 20.3%,marking a significant advancement in BCz-BN-based devices.

关键词： host molecule blue organic light-emitting diode low-efficiency roll-off multiple resonance C–H activation

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The compatibly large nonlinear optical effect and high laser-induced damage threshold in a thiophosphate CsInP_(2)S_(7)constructed with[P_(2)S_(7)]^(4-)and[InS_(6)]^(9-)

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Chinese Chemical Letters 2024年第1期35卷 533-536页

作者： Mengjia luo Xiaohui Li Xingxing Jiang Zheshuai Lin zhengyang Zhou Nanchang Key Laboratory of Photoelectric Conversion and Energy Storage Materials Nanchang Institute of TechnologyNanchang 330099China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050China Functional Crystals Lab Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Institute of Experimental Physics Free University BerlinBerlin D-14195Germany

It is challenging to cooperatively improve the nonlinear optical(NLO)efficiency and the laser-induced damage threshold(LIDT).This work reports a novel IR NLO materials CsInP_(2)S_(7)(CIPS)designed by combination the strategies of alkali metals substitution and microscopic NLO units PS4 introduction based on AgGaS_(2).CIPS was composed of strongly distorted[InS_(6)]^(9-)octahedra and[P_(2)S_(7)]4-dimers constructed by corner-sharing[PS_(4)]^(3-),which increase the NLO efficiency and decrease thermal expansion anisotropy *** with AgGaS_(2),CIPS exhibited strong phase matchable NLO response ca.1.1×AGS@2.1μm,high LIDT ca.20.8×AgGaS_(2),and IR transparency up to 15.3μ*** analysis and theoretical investigation confirmed that large SHG effect and ultrahigh LIDT of CIPS originated from the synergistic contribution of[InS_(6)]^(9-)octahedra and[P_(2)S_(7)]*** results indicate that CIPS is a promising NLO candidate in the mid-IR region,and this study provides a new approach for developing potential NLO-LIDT compatible materials.

关键词： Infrared nonlinear optics materials A novel thiophosphate Structure design Structure-activity relationship High laser-induced damage threshold

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Resonance Suppression Strategy for Humanoid Robot Arm

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Journal of Beijing Institute of Technology 2020年第4期29卷 456-465页

作者： Weiling Zhang Qinjun Du zhengyang Zhao Chuanming Song Wei Ding Yonggang luo School of Electrical and Electronic Engineering Shandong University of TechnologyZibo 255049ShandongChina

To address the problem of resonance in the control of a robot arm,a resonance suppression strategy is proposed for a single-joint humanoid robot arm based on the proportionalresonant(PR)***,an arm joint model of the humanoid robot is *** the influence of resonance frequency on the performance of the control system with the robot arm is *** voltage fluctuation of the drive motor caused by the changes in arm motion is recognized as the disturbance of the current *** PR controller has the characteristic of disturbance rejection at a specific *** output fluctuation of the driving system caused by the change of arm motion state at the resonance frequency is *** the output current of the inverter will not be affected by the vibration of the arm at the resonance ***,the control system is verified by MATLAB/Simulink *** simulation results demonstrate that the control strategy for the humanoid robot arm based on the PR controller can suppress the resonance of the arm effectively,improving the dynamic performance and system stability.

关键词： humanoid robot arm resonance proportional-resonant(PR)controller disturbance rejection

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Research on Remaining Useful Life Prediction Method of Rolling Bearing Based on Health Indicator Extraction and Trajectory Enhanced Particle Filter

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Journal of Dynamics, Monitoring and Diagnostics 2022年第2期1卷 66-83页

作者： Peng luo Jiao Hu Lun Zhang Niaoqing Hu zhengyang Yin Laboratory of Science and Technology on Integrated Logistics Support National University of Defense TechnologyChangsha 410073China College of Intelligence Science and Technology National University of Defense TechnologyChangsha 410073China

Aiming at the difficulty of mining fault prognosis starting points and constructing prognostic models for remaining useful life(RUL)prediction of rolling bearings,a RUL prediction method is proposed based on health indicator(HI)extraction and trajectory-enhanced particle filter(TE-PF).By extracting a HI that can accurately track the trending of bearing degradation and combining it with the early fault enhancement technology,early abnormal sample nodes can be mined to provide more samples with fault information for the construction and training of subsequent prediction *** at the problem that traditional degradation rate models based on PF are vulnerable to HI mutations,a TE-PF prediction method is proposed based on comprehensive utilization of historical degradation information to timely modify prediction model *** from a rolling bearing prognostic study show that prediction starting points can be accurately detected and a reasonable prediction model can be conveniently constructed by the RUL prediction method based on HI amplitude abnormal detection and ***,aiming at the RUL prediction problem under the condition of HI mutation,RUL prediction with probability and statistics characteristics under a confidence interval can be obtained based on the method proposed.

关键词： health indicator prediction model prediction starting point remaining useful life trajectory-enhanced particle filter

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Confined van der Waals Epitaxial Growth of Two-Dimensional Large Single-Crystal In_(2)Se_(3) for Flexible Broadband Photodetectors

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Research 2019年第1期2019卷 1096-1105页

作者： Lei Tang Changjiu Teng Yuting luo Usman Khan Haiyang Pan zhengyang Cai Yue Zhao Bilu Liu Hui-Ming Cheng Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen InstituteTsinghua UniversityShenzhen 518055China Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and TechnologyShenzhen 518055China Shenzhen Key Laboratory of Quantum Science and Engineering Shenzhen 518055China Shenyang National Laboratory for Materials Sciences Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The controllable growth of two-dimensional(2D)semiconductors with large domain sizes and high quality is much needed in order to reduce the detrimental efect of grain boundaries on device performance but has proven to be ***,we analyze the precursor concentration on the substrate surface which signifcantly infuences nucleation density in a vapor deposition growth process and design a confned micro-reactor to grow 2D In_(2)Se_(3) with large domain sizes and high *** uniqueness of this confned micro-reactor is that its size is∼102-103 times smaller than that of a conventional *** a remarkably small reactor causes a very low precursor concentration on the substrate surface,which reduces nucleation density and leads to the growth of 2D In_(2)Se_(3) grains with sizes larger than 200�*** experimental results show large domain sizes of the 2D In_(2)Se_(3) with high *** fexible broadband photodetectors based on the as-grown In_(2)Se_(3) show rise and decay times of 140 ms and 25 ms,efcient response(5.6 A/W),excellent detectivity(7×10^(10) Jones),high external quantum efciency(251%),good fexibility,and high *** study,in principle,provides an efective strategy for the controllable growth of high quality 2D materials with few grain boundaries.

关键词： stability grain sizes

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四类发酵助剂对红酵母产类胡萝卜素的影响

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农产品加工 2024年第10期 15-19页

作者：何宇光罗正阳李达苗欣宇孙慕白牛红红华梅苏颖王景会吉林省农业科学院农产品加工研究所吉林长春130033

为了提高红酵母JAASSRY(*** JAASSRY)类胡萝卜素的合成能力,通过在发酵过程中添加4种不同类型的发酵助剂,以类胡萝卜素含量和菌体生物量为标准,探究最佳发酵助剂的种类及添加量。结果表明,适量添加发酵助剂能够有效提升红酵母的类胡萝... 详细信息

为了提高红酵母JAASSRY(*** JAASSRY)类胡萝卜素的合成能力,通过在发酵过程中添加4种不同类型的发酵助剂,以类胡萝卜素含量和菌体生物量为标准,探究最佳发酵助剂的种类及添加量。结果表明,适量添加发酵助剂能够有效提升红酵母的类胡萝卜素合成能力,其中维生素B族的维B_(1)(2.8 mg/L)和油脂类的大豆油(0.6 mL/L)是最适宜的发酵助剂,2种助剂的类胡萝卜素产量分别达到了224.01μg/g和325.85μg/g,生物量分别为1.30 g/L和0.90 g/L,并且在提升合成能力的同时还具有成本低、稳定性高的特点。添加维B_(1)(2.8 mg/L)和大豆油(0.6 mL/L)能够显著提升红酵母JAASSRY菌株的类胡萝卜素合成能力,是较为理想的红酵母发酵助剂。

关键词：红酵母类胡萝卜素发酵助剂

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