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藏文句向量预训练模型在嵌入式系统中的应用研究

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小型微型计算机系统 2025年第1期46卷 8-15页

作者：吕皓吕慧雍宾宾多拉李妍周庆国周睿兰州大学信息科学与工程学院兰州730000 青海师范大学省部共建藏语智能信息处理及应用国家重点实验室西宁810008

本文研究了将藏文句向量预训练模型部署到嵌入式系统上进行推理和测试的问题.在机器学习中,对文本进行编码和表征存在困难,因此句向量技术成为自然语言处理领域的重要研究方向.然而,在藏文自然语言处理领域,句向量研究相对较少.为此,本... 详细信息

本文研究了将藏文句向量预训练模型部署到嵌入式系统上进行推理和测试的问题.在机器学习中,对文本进行编码和表征存在困难,因此句向量技术成为自然语言处理领域的重要研究方向.然而,在藏文自然语言处理领域,句向量研究相对较少.为此,本文分析了藏文领域已有的预训练模型和句向量表示方法,并设计了一种改进的无监督SimCSE方法(Improved Simple Contrastive learning of Unsupervised Sentence Embeddings,I-SimCSE).实验结果显示,使用I-SimCSE方法得到的藏文句向量模型性能优于其他方法.同时,本文探讨了边缘计算与预训练模型相结合的应用,并讨论了预训练语言模型在嵌入式系统上的潜在应用场景.最后,本文将I-SimCSE句向量模型部署在嵌入式设备Jetson TX1上,并测试了其平均单次推理时间,结果表明在嵌入式系统上部署预训练语言模型进行推理是可行的.综上所述,本文的研究对于藏文句向量预训练模型在嵌入式系统上的应用研究提供了有益的参考,并为未来藏文大模型在嵌入式系统的发展提供了指导和启示.

关键词：藏文句向量表示嵌入式系统预训练模型

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Hybrid uncertainties-based analysis and optimization design of powertrain mounting systems

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Science China(Technological Sciences) 2020年第5期63卷 838-850页

作者： CAI BoHao SHANGGUAN Wen-Bin lühui BO Tao School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou 510641China

In this study,a hybrid uncertainties-based analysis and optimization method is presented for the designs of the powertrain mounting system(PMS)involving mixed *** the presented method,the PMS parameters with sufficient data are treated as random variables,while those with limited information are defined as interval ***,an uncertainty-based analysis method called as hybrid interval-random perturbation-central difference method(HIRP-CDM),is proposed to compute the hybrid interval-random outputs of the inherent characteristics of the PMS in concerned *** addition,the hybrid interval-random-Monte Carlo method(HIR-MCM)is developed to verify the computational accuracy of ***,an optimization model mixed uncertainties is built up for the PMS design based on HIRP-CDM,in which the hybrid intervalrandom outputs of the concerned inherent characteristics are adopted to construct the design objective and *** complex optimization problem can be effectively settled by means of *** effectiveness of the presented method is verified by a numerical example.

关键词： powertrain mounting system hybrid uncertainties uncertainty analysis optimization design

Design of a shielding collimator device for a small-angle monoenergetic neutron source

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Nuclear Science and Techniques 2018年第8期29卷 201-209页

作者： Wen-hui lü hui-Ping Guo Ning lü Kuo Zhao Xiao-Tian Wang Yi-Jie Hou Xi'an Research Institute of Hi-Tech Xi'an 710025China Key laboratory of Particle and Radiation Imaging(Ministryof Education)and Department of Engineering Physics Tsinghua UniversityBeijing 100083China

To obtain a small-angle monoenergetic neutron source,a shielding collimator device is designed for the neutron source generated by a neutron *** device is divided into the collimator and the capture *** collimator is made of three layers of stainless steel and borated polyethylene and is used to constrain neutrons in a small *** capture cave is used to increase the number of times neutron inelastic scattering occurs in the opposite direction of the radiation field,thereby reducing the proportion of scattered neutrons in the radiation *** thickness,aperture size,and the optimum structure of the capture cave were simulated using *** design features a neutron emission angle within a range of 3° and neutron fluxes in the radiation field,which are higher by two orders of magnitude than those outside the radiation *** research has practical value for the generation of monoenergetic small-angle neutron sources and neutron applications.

关键词：小角度中子设备设计防护不锈钢聚乙烯俘获

Improvement of Toughness of UHMWPE/PP Blends

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Journal of Beijing Institute of Technology 2019年第3期28卷 667-674页

作者： Feixiang Guo Hao Jiang hui lü Yanhua Yin School of Chemistry and Chemical Engineering Beijing Institute of Technology

Ultra-high molecular weight polyethylene (UHMWPE) was blended with polypropylene (PP) in order to ensure good processing. Inorganic rigid particles were also used to toughen UHMWPE/PP blends. CaCO3 and a compound additive containing heat mixed polyethylene glycol 2000 and white diatomite were added to the blends. The crystalline, surface morphology and mechanical properties of the blends were investigated comprehensively. The toughness of the material is effectively improved. By contrast, the compound additive had a better result. When the content of additive was 15%, the elongation at the break increased by 279.2% and the fracture energy increased by 343.8% compared to the original samples.

关键词： ultra-high molecular weight polyethylene (UHMWPE) inorganic filler toughness

Quantitative assessment of gas washing of oils in the Tazhong area of the Tarim Basin,Northwest China

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Science China Earth Sciences 2009年第1期52卷 12-21页

作者： YANG ChuPeng GENG AnSong lIAO ZeWen SUN YongGe ZHANG lühui State Key laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou510640China Graduate University of Chinese Academy of Sciences Beijing 100049China

Gas washing has been known in the Tazhong area of the Tarim Basin,but its quantitative assessment has not yet been *** the influence of gas washing fractionation in the area was discussed based on the gas chromatogram data of 68 oils and the results of the mixing experiments of a black oil and a *** results show that the intensity of gas washing fractionation decreased generally from northern to southern part and vertically from deep reservoirs to shallow *** gas washing fractionation was mainly controlled by fault systems in this area,with the increase of n-alkane mass depletion positively correlated to the number and scale of *** washing fractionation appears to have affected the hydrocarbon property,and as a result the diversity of the crude oils is markedly controlled by gas *** addition,the occurrence of waxy oil in this area may be resulted from multiple factors including gas washing,mixed filling and migration fractionation.

关键词： gas washing n-alkane mole fraction n-alkane mass depletion Tazhong area Tarim Basin

Assessment of the crucial factors influencing the responses of ammonia and nitrous oxide emissions to controlled release nitrogen fertilizer: A meta-analysis

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Journal of Integrative Agriculture 2023年第11期22卷 3549-3559页

作者： lü hui-dan WANG Xi-ya PAN Zhao-long ZHAO Shi-cheng State Key laboratory of Efficient Utilization of Arid and Semi-arid Arable land in Northern China/Key laboratory of Plant Nutrition and Fertilizer Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081P.R.China

Reducing ammonia(NH3) and nitrous oxide(N2O) emissions have great effects on mitigating nitrogen(N) nutrient loss and greenhouse gas emissions. Controlled release urea(CRU) can control the N release rate, which reduces reactive N loss and increases nitrogen use efficiency relative to conventional urea(CU). However, the crucial factors influencing the responses of NH3and N2O emissions to CRU relative to CU are still unclear. In this study, we evaluated the responses of NH3and N2O emissions to CRU based on collected field data with a meta-analysis. CRU reduced the NH3and N2O emissions by 32.7 and 25.0% compared with CU, respectively. According to subgroup analysis, CRU presented better mitigation of NH3and N2O emissions in soils with pH 6.5–7.5(–47.9 and –23.7%) relative to either pH7.5(–29.3 and –17.3%), and in the rice season(–34.8 and –29.1%) relative to the wheat season(–19.8 and –22.8%). The responses of NH3and N2O emissions to CRU increased from rainfed(–30.5 and –17.0%) to irrigated(–32.5 and –22.9%), and then to paddy(–34.8 and –29.1%) systems. In addition, the response of N2O emission mitigation increased with increases in soil total nitrogen(TN);however, soil TN did not significantly affect the response of NH3volatilization. The reduction in NH3emission was greater in sandy-textured soil(–57.7%) relative to loam-textured(–32.9%) and clay-textured(–32.3%) soils, whereas soil texture did not affect N2O emission. Overall, CRU was a good option for reducing the NH3and N2O emissions relative to CU in agricultural production. This analysis improves our understanding of the crucial environmental and management factors influencing the mitigation of NH3and N2O emissions under CRU application, and these site-specific factors should be considered when applying CRU to reduce reactive N loss and increase NUE.

关键词： controlled release urea NH volatilization N O emission environmental factor management practice

B→K~*γ Decay in Top-Quark Two-Higgs-Doublet Model

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Communications in Theoretical Physics 2006年第11期46卷 895-900页

作者： XIAO Zhen-Jun,~+ CHENG hui-hui, and l lin-Xia Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097, China Department of Physics Nanjing Normal University Institute of Theoretical Physics Nanjing Normal University

By employing the QCD factorization approach for the exclusive B→Vγ decays, we study the exclusive decay B→K~*γ in the top-quark two-Higgs-doublet model (T2HDM). Within the considered parameter space, we find the following conclusions (a) A light charged-Higgs boson with a mass about 200 GeV is clearly excluded by the date of B→K~*γ decay, and this lower limit is comparable with that from the inclusive B→Xγ decay; (b) The theoretical predictions for CP asymmetry of B→K~*γ in the T2HDM is always less than 1% in size; and (c) The isospin symmetry breaking for B→K~*γ decay in the SM and T2HDM considered here is around 6% in size and well consistent with the data and the general expectations.

关键词： B meson decay charged-Higgs boson branching ratio CP asymmetry

Virus location and lymphocyte Apoptosis in lymph Nodes of Piglets Infected with PCV-2

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Agricultural Sciences in China 2008年第4期7卷 507-512页

作者： SHI lū-juan HAN hui-li ZHANG Shu-xia College of Veterinary Medicine Nanjing Agricultural University Nanjing 210095 P.R.China

The present study has been performed to understand the location of the virus, type of apoptotic cells, and their relation to lymph nodes of piglets infected with porcine circovirus type Ⅱ （PCV-2）. Nine 32-day-old conventional piglets free of infection with PCV-2 were used, and distributed into three groups： control group （n = 3）, piglets inoculated with PCV-2 alone （PCV-2, n = 3）, and PCV-2 inoculated and KlH immunostimulated group （PCV-2 ＋ KlH, n = 3）. Superficial inguinal lymph nodes from all piglets were collected for histological examination after 32 days postinoculation, and immunohistochemistry for PCV-2 detection. location of apoptotic cells was detected with TdT-mediated dUTP nick end labeling （TUNEl） and cell cycle, and the apoptotic rates were measured by flow cytometry. The characteristic histopathological lesions of the piglets in PCV-2 and PCV-2 ＋ KlH were lymphocyte depletions in the cortex and paracortex of the lymph nodes, epithelioid-like macrophage infiltration, and intracytoplasmic inclusion bodies presented in epithelioid-like macrophages. PCV-2 was mainly found in epithelioid-like macrophages by immunohistochemistry. In the lymph nodes, lymphocytes presented higher apoptotic rates in the cortex by TUNEl, special B-cell areas, and similar apoptotic cells were found in this compartment in the control. The apoptotic rates of the lymph nodes were 0.41, 3.34, and 4.88% in the control, PCV-2, and PCV-2 ＋ KlH groups by flow cytometry, respectively. The apoptotic rates of lymph nodes for PCV-2 and PCV-2 ＋ KlH piglets were significantly higher than those for the control group （P〈0.05 and P〈0.01）. The proliferation index （PI） was 0.17_＋0.01, 0.12_＋0.01 and 0.12_＋0.04 in the control, PCV-2, and PCV-2 ＋ KlH group, the PI of the control group was higher than that of the other groups, but without the statistical difference. PCV-2 can induce lymphocyte depletion in lymph nodes of piglets by blocking cell proliferation and promoting apoptosis. This is one of th

关键词： apoptosis virus located lymph node PCV-2 piglets

B→K^＊у/Decay in Top-Quark Two-Higgs-Doublet Model

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Communications in Theoretical Physics 2006年第5X期46卷 895-900页

作者： XIAO Zhen-Jun CHENG hui-hui lü lin-Xia Department of Physics and Institute of Theoretical Physics Nanjing Normal University Nanjing 210097 China

By employing the QCD factorization approach for the exclusive B→Vу decays, we study the exclusive decay B→K^＊у in the top-quark two-Higgs-doublet mode/（T2HDM）. Within the considered parameter space, we find the following conclusions （a） A hght charged-Higgs boson with a mass about 200 GeV is clearly excluded by the date of B→K^＊у decay, and this lower limit is comparable with that from the inclusive B→X8＊у decay; （b） The theoretical predictions for CP asymmetry of B→K^＊у in the T2HDM is always less than 1% in size; and （c） The isospin symmetry breaking for B→K^＊у decay in the SM and T2HDM considered here is around 6% in size and well consistent with the data and the general expectations.

关键词： B meson decay charged-Higgs boson branching ratio CP asymmetry