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Green Energy & Environment 2025年第1期10卷 161-172页

作者： Meng-Ying Liu Zhe-Hui Zhang Xue-Qi Wang Qian sun Chen Zhang Yu Li Zhuohua sun Katalin Barta Feng Peng Tong-Qi yuan State Key Laboratory of Efficient Production of Forest Resources Beijing Forestry UniversityBeijing100083China Beijing Key Laboratory of Lignocellulosic Chemistry Beijing Forestry UniversityBeijing100083China Department of Chemistry Organic and Bioorganic ChemistryUniversity of GrazHeinrichstrasse 28/II8010 GrazAustria

Developing a cost-effective and environmentally friendly process for the production of valuable chemicals from abundant herbal biomass receives great attentions in recent ***,taking advantage of the“lignin first”strategy,corn straw is converted to valuable chemicals including lignin monomers,furfural and 5-methoxymethylfurfural via a two steps *** key of this research lies in the development of a green and low-cost catalytic process utilizing magnetic Raney Ni catalyst and high boiling point ethylene *** utilization of neat ethylene glycol as the sole slovent under atmospheric conditions obviates the need for additional additives,thereby facilitating the entire process to be conducted in glass flasks and rendering it highly convenient for scaling *** the initial step,depolymerization of corn straw lignin resulted in a monomer yield of 18.1 wt%.Subsequently,in a dimethyl carbonate system,the carbohydrate component underwent complete conversion in a one-pot process,yielding furfural and 5-methoxymethylfurfural as the primary products with an impressive yield of 47.7%.

关键词： Atmospheric reductive catalytic fractionation Corn straw Ethylene glycol Raney Ni 5-Methoxymethylfurfural

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应用全范围仿真机的核电站仪控软件设计验证

计算机仿真 2014年第4期31卷 147-150,272页

作者：孙远志张洋庞智中广核(北京)仿真技术有限公司北京100094 北京电力公司北京100031 北京广利核系统工程有限公司北京100093

核电站的安全特性要求数字化仪控系统软件必须具备极高的可靠性,但由于计算机软件的特殊性,要及时发现某些设计缺陷和逻辑错误,必须依赖特殊工况或人为的破坏性试验,这样做的代价是极高的。提供了一种验证方法,即基于核电站全范围仿真机... 详细信息

核电站的安全特性要求数字化仪控系统软件必须具备极高的可靠性,但由于计算机软件的特殊性,要及时发现某些设计缺陷和逻辑错误,必须依赖特殊工况或人为的破坏性试验,这样做的代价是极高的。提供了一种验证方法,即基于核电站全范围仿真机,利用高精度的仿真模型,设计各种安全验证试验,通过模拟核电站的突发工况,验证仪控软件在这种突发工况下的安全性和可靠性;并在"数字化控制系统是不安全的"假设条件下,进行各项非常规操作,以验证仪控软件的逻辑和规程中的不安全因素。通过一个"汽机故障引发的非计划停堆事故"试验,找出了设计中可能存在的缺陷,并给出了改进意见。结果表明,基于全范围仿真机的仪控软件设计验证是可行的。

关键词：数字化仪控系统核电站全范围仿真机软件验证

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激光衍射粒子测试系统数学模型的研究

内燃机学报 1999年第4期17卷 397-400页

作者：孙志远王宝亮郑伟天津大学天津内燃机研究所天津300072

从激光衍射粒子测试系统的应用及其工作基本原理出发，系统阐述了激光衍射粒子测试系统在测量粒子尺寸分布中的计算方法。主要完成了抽样粒子尺寸段的划分、光能贡献矩阵元素求解的理论推导和实际的数学表达式的数学拟合，给出了表征粒... 详细信息

从激光衍射粒子测试系统的应用及其工作基本原理出发，系统阐述了激光衍射粒子测试系统在测量粒子尺寸分布中的计算方法。主要完成了抽样粒子尺寸段的划分、光能贡献矩阵元素求解的理论推导和实际的数学表达式的数学拟合，给出了表征粒子尺寸分布的数学模型，确定了系统求解过程中用到的求解病态或元素不确定矩阵的单纯形优化算法，从而为用激光衍射粒子测试系统测量柴油机中油雾粒子的尺寸分布打下了基础。

关键词：衍射尺寸分布单纯形算法粒子测试系统激光

CMOS direct conversion X-ray detector coupled with fluorinated liquid

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Nuclear Science and Techniques 2025年第1期36卷 59-68页

作者： Shi-Hua Liu Chao-Song Gao Xin Zhang Xiang-Ming sun Meng Wu zhi-Hui Han Tong Wan Yong-Shuai Ge Key Laboratory of Quark&Lepton Physics(MOE) Central China Normal UniversityWuhan 430079China Guizhou Education University Guiyang 550018China Research Center for Medical Artificial Intelligence Chinese Academy of SciencesShenzhen Institutes of Advanced TechnologyShenzhen 518055China

X-ray detectors show potential applications in medical imaging,materials science,and nuclear *** achieve high detection efficiency and spatial resolution,many conventional semiconductor materials,such as amorphous selenium,cadmium telluride zinc,and perovskites,have been utilized in direct conversion X-ray ***,these semiconductor materials are susceptible to temperature-induced performance degradation,crystallization,delamination,uneven lattice growth,radiation damage,and high dark *** study explores a new approach by coupling an FC40 electronic fluorinated liquid with a specialized high-resolution and high-readout-speed complementary metal-oxide-semiconductor(CMOS)pixel array,specifically the Topmetal II−chip,to fabricate a direct conversion X-ray *** fluorinated liquid FC40(molecular formula:C_(21)F_(48)N_(2))is an electronic medium that is minimally affected by temperature and displays no issues with uniform *** exhibits a low dark current and minimal radiation damage and enables customizable thickness in X-ray *** addresses the limitations inherent in conventional semiconductor-based *** this study,simple X-ray detector imaging tests were conducted,demonstrating the excellent coupling capability between FC40 electronic fluorinated liquid and CMOS chips by the X-ray detector.A spatial resolution of 4.0 lp/mm was measured using a striped line par card,and a relatively clear image of a cockroach was displayed in the digital radiography imaging *** test results indicated the feasibility of fabricating an X-ray detector by combining FC40 electronic fluorinated liquid and CMOS *** to the absence of issues related to chip-material coupling,a high spatial resolution could be achieved by reducing the chip pixel *** method presents a new avenue for studies on novel liquid-based direct conversion X-ray detectors.

关键词： FC40 electronic fluorinated liquid CMOS pixel chip X-ray detector Spatial resolution

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制冷型红外成像系统内部杂散辐射测量方法

物理学报 2015年第5期64卷 95-102页

作者：常松涛孙志远张尧禹朱玮中国科学院长春光学精密机械与物理研究所长春130033 中国科学院大学北京100049

杂散辐射是红外光学系统设计和检测过程中涉及的一项重要指标.为了定量测量红外成像系统内部杂散辐射,提出一种基于辐射定标的测量方法,并通过理论推导和实验验证以说明该方法的合理性.首先,建立了不带光学系统的辐射定标模型,即探测器... 详细信息

杂散辐射是红外光学系统设计和检测过程中涉及的一项重要指标.为了定量测量红外成像系统内部杂散辐射,提出一种基于辐射定标的测量方法,并通过理论推导和实验验证以说明该方法的合理性.首先,建立了不带光学系统的辐射定标模型,即探测器直接接收定标源辐射能,获得探测器内部因素对系统输出的影响;然后将其与带有光学系统的定标结果进行比较,得到由光学系统自身辐射对系统输出的影响,进而计算红外成像系统内部杂散辐射;最后通过实验证明了本文理论的正确性.该方法操作简单,对实验条件要求低,并可以精确地测量红外成像系统内部杂散辐射.可用于指导红外系统设计中的杂散辐射抑制,验证系统杂散辐射分析结果是否准确以及检测系统杂散辐射指标是否合格.

关键词：制冷型红外成像系统探测器阵列内部杂散辐射辐射定标

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BP神经网络在多位置捷联寻北系统中的应用

光学精密工程 2009年第8期17卷 1890-1895页

作者：沈铖武王志乾刘畅孙志远李建荣中国科学院长春光学精密机械与物理研究所吉林长春130033 中国科学院研究生院北京100039

为了精确拟合多位置捷联寻北系统采集的数据曲线,计算陀螺初始位置和真北方向的夹角,介绍了多位置捷联寻北系统的工作原理,推导了寻北测量的数学模型,并分析了影响测量精度的因素。分别采用最小二乘法和BP神经网络法,对两种方法的拟合... 详细信息

为了精确拟合多位置捷联寻北系统采集的数据曲线,计算陀螺初始位置和真北方向的夹角,介绍了多位置捷联寻北系统的工作原理,推导了寻北测量的数学模型,并分析了影响测量精度的因素。分别采用最小二乘法和BP神经网络法,对两种方法的拟合精度和最终计算得到的寻北结果进行了比较。实验结果表明:与最小二乘法相比,BP神经网络拟合精度较高,拟合残差和较小,达到0.23μV,残差的均方差达到1.3mV;在计算相位角时,多次寻北结果的均值基本一致,但均方差明显优于最小二乘法,达到8″,满足寻北系统对数据拟合精度的要求。

关键词：捷联寻北曲线拟合 BP神经网络

Permanence in Nonautonomous Predator-prey Lotka-Volterra Systems

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Acta Mathematicae Applicatae Sinica 2002年第3期18卷 411-422页

作者： Wu-jun sun, zhi-dong Teng, yuan-hong YuDepartment of Applied Mathematics. Shanghai Jiaotong University, Shanghai 200030, ChinaDepartment of Mathematics, Xinjiang University. Urumqi 830046.Institute of Applied Mathematics, Academy of Mathematics and System Sciences, Chinese Academy of Sciences, Beijing 100080, China Department of Applied Mathematics Shanghai Jiaotong University Shanghai China Department of Mathematics Xinjiang University Urumqi China Institute of Applied Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing China

In this paper some easily verifiable sufficient conditions on the permanence of solutions for general nonautonomous two-species predator-prey model are established. These new criteria improve and extend the results gi... 详细信息

关键词： Nonautonomous Lotka-Volterra system predator-prey permanence extinction

Predicting Lactobacillus delbrueckii ***-Streptococcus thermophilus interactions based on a highly accurate semi-supervised learning method

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Science China(Life Sciences) 2025年第2期68卷 558-574页

作者： Shujuan Yang Mei Bai Weichi Liu Weicheng Li zhi Zhong Lai-Yu Kwok Gaifang Dong zhihong sun Key Laboratory of Dairy Biotechnology and Engineering Ministry of EducationInner Mongolia Agricultural UniversityHohhot 010018China Key Laboratory of Dairy Products Processing Ministry of Agriculture and Rural AffairsInner Mongolia Agricultural UniversityHohhot 010018China Inner Mongolia Key Laboratory of Dairy Biotechnology and Engineering Inner Mongolia Agricultural UniversityHohhot 010018China Collaborative Innovative Center for Lactic Acid Bacteria and Fermented Dairy Products Ministry of EducationInner Mongolia Agricultural UniversityHohhot 010018China College of Computer and Information Engineering Inner Mongolia Agricultural UniversityHohhot 010018China Inner Mongolia Autonomous Region Key Laboratory of Big Data Research and Application of Agriculture and Animal Husbandry Hohhot 010018China

Lactobacillus delbrueckii ***(***)and Streptococcus thermophilus(***)are commonly used starters in milk *** experiments revealed that *** interactions(Lb St I)substantially impact dairy product quality and *** biological humidity experiments are time-consuming and labor-intensive in screening interaction combinations,an artificial intelligence-based method for screening interactive starter combinations is ***,in the current research on artificial intelligence based interaction prediction in the field of bioinformatics,most successful models adopt supervised learning methods,and there is a lack of research on interaction prediction with only a small number of labeled ***,this study aimed to develop a semi-supervised learning framework for predicting Lb St I using genomic data from 362 isolates(181per species).The framework consisted of a two-part model:a co-clustering prediction model(based on the Kyoto Encyclopedia of Genes and Genomes(KEGG)dataset)and a Laplacian regularized least squares prediction model(based on K-mer analysis and gene composition of all isolates datasets).To enhance accuracy,we integrated the separate outcomes produced by each component of the two-part model to generate the ultimate Lb St I prediction results,which were verified through milk fermentation *** through milk fermentation experiments confirmed a high precision rate of 85%(17/20;validated with 20 randomly selected combinations of expected interacting isolates).Our data suggest that the biosynthetic pathways of cysteine,riboflavin,teichoic acid,and exopolysaccharides,as well as the ATP-binding cassette transport systems,contribute to the mutualistic relationship between these starter bacteria during milk ***,this finding requires further experimental *** presented model and data are valuable resources for academics an

关键词： Lactobacillus delbrueckii subsp.bulgaricus and Streptococcus thermophilus interaction prediction semi-supervised learning dairy starter artificial intelligence milk fermentation

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开式并联微通道中流动沸腾换热的实验研究

工程热物理学报 2018年第7期39卷 1498-1504页

作者：赵亚东张伟邬智宇孙远志徐进良华北电力大学能源动力与机械工程学院北京102206 低品位能源多相流与传热北京市重点实验室北京102206

针对常规闭式并联微通道内流动沸腾换热存在气泡生长受限产生的堵塞效应以及不同通道内气泡核化生长不同步导致的并联通道传热不稳定性等问题,设计了一种顶部联通型开式并联微通道蒸发器。采用无水乙醇为工质,在入口过冷度为15℃、质量... 详细信息

针对常规闭式并联微通道内流动沸腾换热存在气泡生长受限产生的堵塞效应以及不同通道内气泡核化生长不同步导致的并联通道传热不稳定性等问题,设计了一种顶部联通型开式并联微通道蒸发器。采用无水乙醇为工质,在入口过冷度为15℃、质量流速为175 kg·m^(-2)·s^(-1)及热流密度270～761 kW·m^(-2)条件下,开展了该新型微通道冷却器中流动沸腾换热的实验研究,发现了传热系数随干度的增加呈现三类典型趋势,即传热系数单调上升、传热系数先上升后下降再上升、传热系数先上升再保持基本不变;结合高速可视化流型研究,发现了与流型密切关联的三类传热机理,即:1)以气泡核化为主的核态沸腾换热;2)上游核态沸腾为主,下游两相强制对流换热主导;3)偏离核态沸腾后的膜态沸腾换热。分析表明,沸腾数Bo是主导三类传热模式的主要无量纲数。

关键词：开式微通道流动沸腾换热系数沸腾数传热机理

Innovative dual-mode device integrating capacitive desalination and solar vapor generation for high-efficiency seawater desalination

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Journal of Energy Chemistry 2025年第1期100卷 171-179页

作者： Jiacheng Wang Zhaoyu Chen Ruduan yuan Jiaxin Luo Ben Zhang Keju Ji Meng Li Juanxiu Xiao Kuan sun National Innovation Center for Industry-Education Integration of Energy Storage Technology MOE Key Laboratory of Low-grade Energy Utilization Technologies and SystemsCollege of Energy&Power EngineeringChongqing UniversityChongqing 400044China Xuefeng Mountain Energy Equipment Safety National Observation and Research Station CQU-NUS Renewable Energy Materials&Devices Joint LaboratoryChongqing UniversityChongqing 400044China Southwest Technology and Engineering Research Institute Chongqing 400039China Jiangsu Provincial Key Laboratory of Bionic Functional Materials College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016JiangsuChina State Key Laboratory of Marine Resources Utilization in South China Sea Collaborative Innovation Center of Marine Science and TechnologySchool of Marine Science and EngineeringHainan UniversityHaikou 570228HainanChina

Solar-driven interface evaporation with high solar-to-steam conversion efficiency has shown great potential in seawater ***,due to the influence of latent heat and condensation efficiency,the water yield from solar-driven interface evaporation remains insufficient,posing a significant challenge that requires *** this work,we designed a dual-mode high-flux seawater desalination device that combines solar-driven interface evaporation and capacitive *** utilizing coupled desalination materials exhibiting both photothermal conversion and capacitance activity,the device demonstrated photothermal evaporation rates of 1.41 and 0.97 kg m^(-2)h^(-1)for condensate water yield under one-sun ***,the device exhibited a salt adsorption capacity of up to48 mg g^(-1)and a salt adsorption rate of 2.1 mg g^(-1)*** addition,the salt adsorption capacity increased by approximately 32%under one-sun ***,photo-enhanced capacitive desalination performance was explored through numerical simulations and theoretical *** calculations and characterizations confirmed that the defect energy levels formed by the introduction of sulfur vacancies can effectively widen the light absorption range,improve photothermal conversion performance,and stimulate more photoelectrons to participate in capacitive ***,the electron distribution state of molybdenum disulfide with sulfur vacancies and surface defect sites contributes to ion/electron transport at the solid-liquid *** work provides a novel pathway for integrating solar vapor generation with other low-energy desalination technologies.

关键词： Capacitive deionization Solar vapor generation Molybdenum disulfide Defect engineering