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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： jun Jiang Zhenjie Lu Yanwen Ding Shujun liu Zhijie Qi Tian Tang Yunfan Zhang Zhiyuan ma Jingwen Sun liang xue Wenyao Zhang Pan Xiong Xin Wang junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** li||li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 ma cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： lithium-sulfur batteries Staged dendrite suppression Shuttle effect Surface-negatively-charged nanodiamond

Microbiome changes in esophageal cancer:implications for pathogenesis and prognosis

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Cancer Biology & Medicine 2024年第2期21卷 163-174页

作者： Yi li bing Wei Xia xue Hongle li jun li Department of Molecular Pathology Clinical Pathology CenterAffiliated Cancer Hospital of Zhengzhou University and Henan Cancer HospitalZhengzhou 450003China Henan Key Laboratory of Molecular Pathology Zhengzhou 450003China Henan Key Laboratory of Helicobacter pylori&Microbiota and Gastrointestinal Cancer Marshall Medical Research CenterThe Fifth Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China

Esophageal cancer(EC)is an aggressive malignancy with a poor *** factors,including dietary habits,and antacid and antibiotic use,have been shown to influence the esophageal ***,enrichment and diversity of the esophageal microbiome can also impact its *** studies have revealed prevalent changes in the esophageal microbiome among patients with EC,thus suggesting the potential contribution of the esophageal microbiome to EC ***,distinct microbiome compositions have been observed in patients with different responses to radiotherapy and chemotherapy,indicating the role of the esophageal microbiome in modulating treatment *** this review,we have examined previous studies on the esophageal microbiome in healthy individuals and patients with EC or other esophageal diseases,with a focus on identifying microbial communities associated with EC pathogenesis and *** the role of the microbiome in EC may aid in early detection and optimized treatment strategies,ultimately leading to better outcomes for patients.

关键词： Esophageal cancer microbiome dysbiosis microenvironment carcinogenesis

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使用光谱分析实现弯管中两相流含气率的预测

光谱学与光谱分析 2025年第1期45卷 231-238页

作者：车少敏马世一刘雪婧殷雄周延熊兵李锟李飞西安交通大学能源与动力工程学院陕西西安710049 中国航发四川燃气涡轮研究院四川成都610500 西安石油大学电子工程学院陕西西安710065

空气被夹带进入发动机润滑油系统形成油气两相流后,会严重影响润滑系统的正常运行。因此实现发动机润滑油系统中油气两相流含气率的准确和快速测量具有十分重要的意义。基于光谱匹配方法,对发动机润滑油系统在弯管处的油气两相流含气率... 详细信息

空气被夹带进入发动机润滑油系统形成油气两相流后,会严重影响润滑系统的正常运行。因此实现发动机润滑油系统中油气两相流含气率的准确和快速测量具有十分重要的意义。基于光谱匹配方法,对发动机润滑油系统在弯管处的油气两相流含气率进行了测量研究。首先使用近红外、可见光和紫外光谱仪获取油气两相流在2个流速、5个温度工况下0.10%~1.00%含气率范围(间隔0.06%)的吸光度数据并进行分析,确认油气两相流在三个波段下均有吸收,且吸收强度与含气率有关;其次提出将数据预处理结合光谱相似性测度方法并应用于弯管含气率光谱分析中,显著降低了基于原始光谱的含气率预测的最大相对误差。在近红外波段通过使用数据增强方法如中心化(center)和标准化(autoscaling)并结合光谱角余弦方法,得出新润滑油的含气率最大相对误差相对于原始光谱得到的数值从48%降低到36%。利用该方法分别在三个波段进行含气率预测,试验工况包括2个流速、5个温度,分析了两相流的温度和流速对含气率预测的影响。温度30.0℃,流速5.1 m·min^(-1)下,含气率信息在紫外波段(193.5~413.8 nm)与光谱向量的方向或形状差异的联系更为紧密,含气率预测的最大相对误差仅为6%。在近红外和可见光波段,流速或温度一定时,最大相对误差随着温度或流速的增加均有减小趋势。紫外波段下温度对含气率预测效果没有特定的影响规律,随着两相流的流速增加,含气率预测的最大相对误差有增大趋势。结果表明对于透光性较好的新润滑油,使用紫外光谱仪进行含气率数据的采集,含气率的预测选用标准化预处理结合光谱角余弦方法,得到的含气率预测最大相对误差最小。

关键词：气液两相流含气率光谱分析光谱匹配

Modeling the hydration,viscosity and ultrasonic property evolution of class G cement up to 90℃ and 200 MPa by a scale factor method

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Petroleum Science 2023年第4期20卷 2372-2385页

作者： li-jun Sun xue-Yu Pang Siavash Ghabezloo Hai-bing Yan School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongPR China Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)) Ministry of EducationQingdao266580ShandongPR China Navier Ecole des PontsUniv Gustave EiffelCNRSMarne-la-ValleeFrance CNPC Chuanqing Drilling Engineering Co.Ltd.(CCDC) Chengdu610051SichuanPR China

A comprehensive experimental program has been performed to characterize the hydration and engineering property evolution of a class G oil well cement under various curing temperatures from 30 to 90℃.The progress of hydration was monitored by isothermal calorimetry(atmospheric pressure);the viscosity evolution was measured using a high temperature and high pressure consistometer(up to 200 MPa);the ultrasonic property development was evaluated by an ultrasonic cement analyzer(up to 100 MPa).Test results indicate that the influences of curing temperature and pressure on the hydration,viscosity and ultrasonic property development can be modeled by a scale factor method that is similar to the maturity method used in the concrete ***,the key parameters of the scale factor model,namely the apparent activation energy and the apparent activation volume of cement showed obvious variations with test method and curing *** test results indicate that the curing temperature has a stronger effect on cement hydration rate than viscosity and ultrasonic property development rate,while the curing pressure has a much stronger influence on cement slurry properties before setting(viscosity)than after setting(ultrasonic property).

关键词： Activation energy Activation volume Isothermal calorimetry Consistency Ultrasonic property

基于改进人工神经网络的多指标冷鲜羊肉新鲜度无损检测

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光谱学与光谱分析 2025年第1期45卷 291-300页

作者：徐子洋姜新华翟成珺马学磊李靖内蒙古农业大学计算机与信息工程学院内蒙古呼和浩特010018 内蒙古自治区农牧业大数据研究与应用重点实验室内蒙古呼和浩特010018 内蒙古自治区教育考试院内蒙古呼和浩特010018

冷鲜羊肉新鲜度受多种因素影响,可通过多个理化和微生物指标综合评价。传统检测方法操作复杂、效率低。高光谱成像作为一种快速且非破坏性的检测技术,可以有效地检测冷鲜羊肉新鲜度改变过程中不同成分的变化。为了研究采用高光谱成像技... 详细信息

冷鲜羊肉新鲜度受多种因素影响,可通过多个理化和微生物指标综合评价。传统检测方法操作复杂、效率低。高光谱成像作为一种快速且非破坏性的检测技术,可以有效地检测冷鲜羊肉新鲜度改变过程中不同成分的变化。为了研究采用高光谱成像技术实现冷鲜羊肉新鲜度多指标评价的可行性,提出一种改进人工神经网络算法,通过重新定义损失函数加强标记之间的相关性,充分采用多个新鲜度指标对冷鲜羊肉新鲜度分类。试验收集了0~14 d冷鲜羊肉样本在400~1000 nm范围的高光谱图像,采用实验室方法测定挥发性盐基氮(TVB-N)、pH值、菌落总数(TAC)和大肠菌群近似数(ANC)指标值。通过S-G平滑滤波法和多元散射校正对冷鲜羊肉样本原始光谱数据进行预处理,采用连续投影法(SPA)选择光谱数据的18个特征波长作为输入数据,采用所提出的改进人工神经网络算法建立多指标冷鲜羊肉新鲜度等级模型。结果表明,改进人工神经网络对测试集的分类准确率达96%,三个新鲜度等级样本的识别率分别为100%、89.28%和98.68%,采用汉明损失(hamming loss)、1-错误率(one-error)、排序损失(ranking loss)和覆盖率(coverage)四种多标记模型指标进行评价,评价指标分别为0.008、0.002、0.0025和4.048。改进人工神经网络分类模型的准确率和各项模型评价指标均优于传统ANN,证明改进人工神经网络用于多指标冷鲜羊肉新鲜度的无损检测具有可行性。

关键词：无损检测高光谱神经网络多指标分类

Recent Developments of Dinitrogen Activation on Metal Complexes and Clusters

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Chinese Journal of Structural Chemistry 2022年第12期41卷 80-88页

作者： xue-Lu ma Meng li jun-Bo Lu Cong-Qiao Xu jun li School of Chemical&Environmental Engineering China University of Mining&TechnologyBeijing 100083China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China Department of Chemistry and Key Laboratory of Organic Optoelectronics&Molecular Engineering of Ministry of Education Tsinghua UniversityBeijing 100084China

Dinitrogen(N_(2)) is the major component of the atmosphere and many factors bring about dinitrogen inertness with low reactivity. Dinitrogen activation on metal complexes and clusters under ambient condition is the long-standing goal in the modern chemistry. In this review,an attempt has been made to survey the mechanistic aspects of dinitrogen activation and functionalization based on different coordination binding modes of dinitrogen. Our goal is to provide a comprehensive survey of dinitrogen activation in order to guide the relevant research in the future.

关键词： dinitrogen activation binding mode dinitrogen complex metal cluster synergistic mechanism

Derivation and validation of soil total and extractable cadmium criteria for safe vegetable production

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Journal of Integrative Agriculture 2023年第12期22卷 3792-3803页

作者： li li-jun li Kun JIANG Bao li Ju-mei ma Yi-bing Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Sichuan Academy of Forestry Sichuan 610081P.R.China National Urban Environmental Pollution Control Engineering Research Center Beijing Municipal Research Institute of Environmental ProtectionBeijing 100037P.R.China National Observation and Research Station of Coastal Ecological Environments in macao/macao Environmental Research Institute Macao University of Science and TechnologyMacao SAR 999078P.R.China

Determining the appropriate soil cadmium(Cd)criteria for vegetable production is important for ensuring that the Cd concentrations of the vegetables meet food safety *** soil extractable Cd criteria for vegetable production are also essential for both food safety and environmental management,especially in areas with a high natural background *** the present study,soil total and extractable Cd criteria were derived using the approach of species sensitivity distribution integrated with soil aging and bioavailability as affected by soil properties.A dataset of 90 vegetable species planted in different soils was compiled by screening the published in literature in five bibliographic databases using designated search *** empirical soil-plant transfer model was applied to normalize the bioaccumulation *** normalization,the intra-species variability was reduced by 18.3 to 84.4%.The soil Cd concentration that would protect 95%(HC_(5))of the species was estimated by species sensitivity distribution curves that were fitted by the Burr III *** soil Cd criteria derived from the added approach for risk assessment were proposed as continuous criteria based on a combination of organic carbon and pH in the *** for total Cd and EDTA-extractable Cd in the soil ranged from 0.23 to 0.61 mg kg^(-1)and from 0.09 to 0.25 mg kg^(-1),*** experimental data were used to validate the applicability and validity of these *** of the predicted HC5 values in the field experimental sites were below the 1:1 *** results provide a scientific basis for soil Cd criteria for vegetable production that will ensure food safety.

关键词： Cd vegetables soil criteria species sensitivity distribution soil extractable Cd criteria

Aspect in Topography to Enhance Fine-detailed Landform Element Extraction on High-resolution DEM

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Chinese Geographical Science 2021年第5期31卷 915-930页

作者： XIE Xiao ZHOU Xiran xue bing xue Yong QIN Kai li Jingzhong YANG jun School of Environment Science and Spatial Informatics China University of Mining and TechnologyXuchou 221116China KeyLab for Environmental Computation and Sustainability of liaoning Province Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China Artificial Intelligence Research Institute China University of Mining and TechnologyXuchou221116China School of Geodesy and Geomatics Wuhan UniversityWuhan 430072China JangHo Architecture Northeastern UniversityShenyang 110169China

The value of the high-resolution data lies in the high-precision information *** fine-detailed landform element extraction is thus the basis of high-fidelity application of the high-resolution digital elevation models(DEMs).However,the results of landform element extraction generated by classical methods might be ungrounded on high-resolution *** paper presents our research on using the aspect to reinforce the applicability and robustness of the classical approaches in landform element ***,according to the research of pattern recognition,we assume that aspect-enhanced landform representation is robust to rotation,scaling and affine *** testify the role of aspect,we respectively integrated the aspect into three classical approaches:mean curvaturebased fuzzy classification,elevation-based feature descriptor,and object-based *** the experiment,based on four types of high-resolution DEMs(1 m,2 m,4 m and 8 m),we compare each classical approaches and their corresponding aspect-enhanced approaches based on extracting the rims of two craters having different landforms,and the ridgelines and valleylines of a region covered by few vegetables and man-made *** comparison to the results generated by curvature-based fuzzy classification,the aspect enhanced curvature-based fuzzy classification can effectively filter a number of noises outperforms the curvature-based ***,the aspect-enhanced feature descriptor can detect more landform elements than the elevation-based feature ***,the aspect-based segmentation can detect the main structure of landform,while the boundaries segmented by classical approaches are messing and *** systematic experiments on meter-level resolution DEMs proved that the aspect in topography could effectively to improve the classical method-system,including fuzzy-based classification,feature descriptors-based detection and object-based *** value of aspec

关键词： high-resolution DEM(digital elevation model) landform representation landform element extraction crater detection aspect granularity aspect-enhanced landform representation America

Synthesis,characterization and optical studies on Sm2+-doped CdSe nanocrystals:a blueshift and fixed emission with high quantum yields

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Rare Metals 2019年第11期38卷 1097-1104页

作者： jun-Hong Yang jun-Fang Gao Sheng-li Yong xue-lin ma li-Jing liu Department of Chemistry Baotou Teachers’ College

CdSe:Sm nanocrystals(NCs) were synthesized by a water phase method,and their structures,shapes and optical properties were further characterized.X-ray diffraction(XRD) analysis suggested that both the CdSe and CdSe:Sm NCs contained(111),(220) and(311) lattice planes in the zinc blende structure overlapped with the(002),(110) and(112) lattice planes in the wurtzite structure,and the diameters were about 4.2,3.3 and 2.3 nm for CdSe,CdSe:Sm(8%) and CdSe:Sm(10%) NCs,*** of the CdSe:Sm NCs were monodispersed and uniform spherical *** CdSe:Sm(10%) NCs prepared with different reaction times exhibited constant absorption spectra at 430 nm and a fixed emission peak at581 *** with those of pure CdSe NCs,the fluorescence emission of CdSe:Sm(10%) NCs blueshifted 20-36 nm,and the absorption peak initially redshifted and then blueshifted with the prolongation of reaction *** addition,the Sm^2+ doping decreased the fluorescence lifetime and increased the quantum yields(QYs) of CdSe *** QYs of CdSe:Sm NCs increased initially and then decreased with the increase in the amount of doped Sm2+.The initial pH and charge compensator concentration also exhibited significantly enhanced fluorescence emission of CdSe:Sm NCs.

关键词： CdSe:Sm NCs Doping Optical properties Blueshift QYs