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AlphaMobileSensing:A virtual testbed for mobile environmental monitoring

Building Simulation 2023年第7期16卷 1027-1040页

作者： Qi Zhou Haoran Zhong LINYan Li Zhe Wang Department of Civil and Environmental Engineering The Hong Kong University of Science and TechnologyHong KongChina School of Data Science City University of Hong KongHong KongChina HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute FutianShenzhenChina

Environmental monitoring plays a critical role in creating and maintaining a comfortable,productive,and healthy environment.Built upon the advancements of robotics and data processing,mobile sensing demonstrates its potential to address problems regarding cost,deployment,and resolution that stationary monitoring encounters,which therefore has attracted increasing research attentions recently.To facilitate mobile sensing,two key algorithms are needed:the field reconstruction algorithm and the route planning algorithm.The field reconstruction algorithm is to reconstruct the entire environment field from spatially-and temporally-discrete measurements collected by the mobile sensors.The route planning algorithm is to instruct the mobile sensors where the mobile sensor needs to move to for the next measurements.The performance of mobile sensors highly depends on these two algorithms.However,developing and testing those algorithms in the real world is expensive,challenging,and time-consuming.To address these issues,we proposed and implemented an open-source virtual testbed,AlphaMobileSensing,that can be used to develop,test,and benchmark mobile sensing algorithms.AlphaMobileSensing aims to help users more easily develop and test the field reconstruction and route planning algorithms for mobile sensing solutions,without worrying about hardware fault,test accidents(such as collision during the test),etc.The separation of concerns can significantly reduce the cost of developing software solutions for mobile sensing.For versatility and flexibility,AlphaMobileSensing was wrapped up using the standardized interface of OpenAI Gym,and it also provides an interface for loading physical fields that were generated by numerical simulations as virtual test sites to perform mobile sensing and retrieving monitoring data.We demonstrated applications of the virtual testbed by implementing and testing algorithms for physical field reconstruction in both static and dynamic indoor thermal environments.AlphaMobileSensing provides a novel a

关键词： mobile sensing environmental monitoring indoor environmental quality environmental field reconstruction

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Exploration and mitigation of protrusion behavior in Ga-ion doped h-BN memristors

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纳米技术与精密工程(英文) 2023年第3期6卷 10-17页

作者： Mucun Li Enxiu Wu LINYan Xu Xiaodong Hu Xiaopu Miao State Key Laboratory of Precision Measurement Technology and Instruments School of Precision Instruments and Opto-electronics EngineeringTianjin UniversityNo.92 Weijin RoadTianjin 300072People’s Republic of China State Key Laboratory of Transducer Technology Institute of ElectronicsChinese Academy of SciencesBeijing 100190People’s Republic of China

Using hexagonal boron nitride(h-BN)to prepare resistive switching devices is a promising strategy.Various doping methods have aroused great interest in the semiconductor field in recent years,but many researchers have overlooked the various repetitive anomalies that occur during the testing process.In this study,the basic electrical properties and additive protrusion behavior of Ga-ion-doped h-BN memristors at micro–nanoscale during the voltage scanning process are investigated via atomic force microscopy(AFM)and energy dispersive spectroscopy.The additive protrusion behavior is subjected to exploratory research,and it is concluded that it is caused by anodic oxidation.An approach is proposed that involves filling the AFM chamber with nitrogen gas to improve the stability of memristor testing,and this method provides a solution for enhanced testing stability of memristors.

关键词： Hexagonal boron nitride Memristor AFM Anodic oxidation

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Biofilm-overproducing Bacillus subtilis B12ΔYwcc decreases Cd uptake in Chinese cabbage through increasing Cd-immobilizing related gene abundance and root surface colonization

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Journal of Environmental Sciences 2022年第10期34卷 84-93页

作者： Yanyan Ge Zhanbiao Ge Jinwei Zheng Xiafang Sheng LINYan He College of Life Sciences Nanjing Agricultural UniversityKey Laboratory of Agricultural and Environmental MicrobiologyMinistry of AgricultureNanjing 210095China

Biofilm-producing bacteria can decrease Cd uptake in vegetables, but mechanisms underlying this effect are poorly characterized. In this study, two mutant strains B12ΔYwcc and B12ΔSlr R were constructed from a biofilm-producing Bacillus subtilis strain B12. Then, the impacts of strain B12 and its high biofilm-producing mutant strain B12ΔYwcc and low biofilmproducing mutant strain B12ΔSlr R on Cd availability and uptake in Chinese cabbage and the related mechanisms were investigated in the Cd-polluted soil. Strain B12 and its mutants B12ΔYwcc and B12ΔSlr R increased the dry biomasses of edible tissues by 54%–130% compared with the controls. Strain B12 and its mutant B12ΔYwcc reduced the soil available Cd content by 36%–50% and root and edible tissue Cd contents by 23%–50% compared with the controls. Furthermore, the mutant strain B12ΔYwcc reduced the edible tissue Cd content by40% and increased the polysaccharide content by 23%, invertase activity by 139%, and gene copies of the cum A by 4.5-fold, eps A by 7.1-fold, and cad A by 4.3-fold, which were involved in Cd adsorption in the rhizosphere soils, respectively, compared with strain B12. The polysaccharide content and cum A, eps A, and cad A gene copy numbers showed significantly reverse correlations with the available Cd content. Notably, the mutant strain B12ΔYwcc showed better ability to colonize the vegetable root surface than strain B12. These findings demonstrated that the biofilm-overproducing mutant strain B12ΔYwcc increased the polysaccharide production and Cd-immobilizing related cum A, eps A, and cad A gene copies, resulting in lower Cd availability and accumulation in Chinese cabbage in the Cd-polluted soil.

关键词： Biofilm-producing Bacillus subtilis Mutant strain with biofilm overproduction Cd uptake in vegetable Cd-stabilizing related genes Bacterial colonization and biofilm formation

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Wind power time series simulation model based on typical daily output processes and Markov algorithm

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Global Energy Interconnection 2022年第1期5卷 44-54页

作者： Zhihui Cong Yuecong Yu LINYan Li Jie Yan Datang(Chifeng)New Energy Co. LtdChifeng 024000P.R.China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of New EnergyNorth China Electric Power UniversityBeijing 102206P.R.China

The simulation of wind power time series is a key process in renewable power allocation planning,operation mode calculation,and safety assessment.Traditional single-point modeling methods discretely generate wind power at each moment;however,they ignore the daily output characteristics and are unable to consider both modeling accuracy and efficiency.To resolve this problem,a wind power time series simulation model based on typical daily output processes and Markov algorithm is proposed.First,a typical daily output process classification method based on time series similarity and modified K-means clustering algorithm is presented.Second,considering the typical daily output processes as status variables,a wind power time series simulation model based on Markov algorithm is constructed.Finally,a case is analyzed based on the measured data of a wind farm in China.The proposed model is then compared with traditional methods to verify its effectiveness and applicability.The comparison results indicate that the statistical characteristics,probability distributions,and autocorrelation characteristics of the wind power time series generated by the proposed model are better than those of the traditional methods.Moreover,modeling efficiency considerably improves.

关键词： Wind power Time series Typical daily output processes Markov algorithm Modified K-means clustering algorithm

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Grazing greatly reduces the temporal stability of soil cellulolytic fungal community in a steppe on the Tibetan Plateau

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Journal of Environmental Sciences 2022年第11期34卷 48-57页

作者： Fei Wang Weidong Kong Mukan Ji Kang Zhao Hao Chen LINYan Yue Xiaobin Dong Key Laboratory of Alpine Ecology Institute of Tibetan Plateau ResearchChinese Academy of Sciences(CAS)Beijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100039China CAS Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing 100101China School of Life Science Shanxi Normal UniversityLinfen 041004China State Key Laboratory of Earth Surface Processes and Resource Ecology College of Resources Science and TechnologyBeijing Normal UniversityBeijing 100875China

Excessive livestock grazing degrades grasslands ecosystem stability and sustainability by reducing soil organic matter and plant productivity. However, the effects of grazing on soil cellulolytic fungi, an important indicator of the degradation process for soil organic matter,remain less well understood. Using T-RFLP and sequencing methods, we investigated the effects of grazing on the temporal changes of cellulolytic fungal abundance and community structure in dry steppe soils during the growing months from May to September, on the Tibetan Plateau using T-RFLP and sequencing methods. The results demonstrated that the abundance of soil cellulolytic fungi under grazing treatment changed significantly from month to month, and was positively correlated with dissolved organic carbon(DOC) and soil temperature, but negatively correlated with soil p H. Contrastingly, cellulolytic fungal abundance did not change within the fencing treatment(ungrazed conditions). Cellulolytic fungal community structure changed significantly in the growing months in grazed soils,but did not change in fenced soils. Grazing played a key role in determining the community structure of soil cellulolytic fungi by explaining 8.1% of the variation, while p H and DOC explained 4.1% and 4.0%, respectively. Phylogenetically, the cellulolytic fungi were primarily affiliated with Ascomycota(69.65% in relative abundance) and Basidiomycota(30.35%).Therefore, grazing substantially reduced the stability of soil cellulolytic fungal abundance and community structure, as compared with the fencing treatment. Our finding provides a new insight into the responses of organic matter-decomposing microbes for grassland managements.

关键词： Cellulolytic fungal community cbhI Stability Grazing Dryland soil Tibetan Plateau

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Self-Adaptive Grinding for Blind Tip Reconstruction of AFM Diamond Probe

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Nanotechnology and Precision Engineering 2018年第2期1卷 150-155页

作者： LINYan Xu Qishan Guo Shuangbei Qian Sen Wu State Key Laboratory of Precision Measuring Technology and Instruments(Tianjin University) Tianjin 300072China

Blind tip reconstruction(BTR) method is one of the favorable methods to estimate the atomic force microscopy(AFM) probe shape. The exact shape of the characterizer is not required for BTR, while the geometry of the sample may affect the reconstruction significantly. A cone-shaped array sample was chosen as a characterizer to be evaluated. The target AFM probe to be reconstructed was a diamond triangular pyramid probe with two feature angles, namely front angle(FA) and back angle(BA). Four conical structures with different semi-angles were dilated by the pyramid probe. Simulation of scanning process demonstrates that it is easy to judge from the images of the isolated rotary structure, cone-shaped, the suitability of the sample to be a tip characterizer for a pyramid probe. The cone-shaped array sample was repeatedly scanned 50 times by the diamond probe using an AFM. The series of scanning images shrank gradually and more information of the probe was exhibited in the images, indicating that the characterizer has been more suitable for BTR. The feature angle FA of the characterizer increasingly reduces during the scanning process. A self-adaptive grinding between the probe and the characterizer contributes to BTR of the diamond pyramid probe.

关键词： AFM diamond probe BTR Cone characterizer Self-adaptive Grinding

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Predicting microbial extracellular electron transfer activity in paddy soils with soil physicochemical properties using machine learning

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Science China(Technological Sciences) 2024年第1期67卷 259-270页

作者： OU JiaJun LUO XiaoShan LIU JunYang HUANG LINYan ZHOU LiHua YUAN Yong School of Automation Guangdong University of TechnologyGuangzhou 510006China Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangzhou Key Laboratory Environmental Catalysis and Pollution ControlSchool of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China School of Biomedical and Pharmaceutical Sciences Guangdong University of TechnologyGuangzhou 510006China

Soil extracellular electron transfer(EET)is a pivotal biological process within the realm of soil.Unfortunately,EET suffers from a lack of predictive models.Herein,an intricately crafted machine learning model has been developed for the purpose of predicting soil EET by using the physicochemical properties of soil as independent input variables and the EET capabilities in terms of current density(j_(max))and Coulombic charge(C_(out))as dependent output variables.An autoencoder ensemble stacking(AES)model was developed to address the aforementioned issue by integrating support vector machine,multilayer perceptron,extreme gradient boosting,and light gradient boosting machine algorithms as the stacking algorithms.With 10-fold crossvalidation,the AES model exhibited notable improvements in predicting j_(max)and C_(out),with average test R^(2)values of 0.83 and 0.84,respectively,surpassing those of single machine learning(ML)models and the basic ensemble model.By utilizing partial correlation plots(PDPs),Shapley Additive explanations(SHAP)values,and SHAP decision plots,we quantitatively explained the impact and contribution of the input molecules on the AES model’s predictions of j_(max)and C_(out).In the context of the SHAP method for the AES model,total carbon(TC)was identified as the most correlated descriptor for j_(max),while total organic carbon(TOC)stood out as the most relevant descriptor for C_(out).In the prediction tasks of j_(max)and C_(out)within the AES model,employing a multitask ML approach allowed the model to benefit from the shared information of input variables,thereby enhancing its overall generalizability.This study provides a feasible tool for the prediction of soil EET from soil physiochemical properties and an advanced understanding of the relationship between soil physiochemical properties and EET capability.

关键词： extracellular electron transfer paddy soil machine learning prediction autoencoder ensemble stacking model

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Bacillus licheniformis PF9 improves barrier function and alleviates inflammatory responses against enterotoxigenic Escherichia coli F4 infection in the porcine intestinal epithelial cells

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Journal of Animal Science and Biotechnology 2022年第5期13卷 1413-1427页

作者： Qiao Li LINYan Li Yanhong Chen Changning Yu Paula Azevedo Joshua Gong Chengbo Yang College of Veterinary Medicine Nanjing Agricultural UniversityNanjing 210095China Department of Animal Science University of ManitobaWinnipegManitoba R3T 2N2Canada Guelph Research and Development Centre Agriculture Agri-Food CanadaGuelphOntario N1G 5C9Canada State Key Laboratory of Food Science and Technology Nanchang UniversityNanchang 330047China

Background:Enterotoxigenic Escherichia coli(ETEC)F4 commonly colonizes the small intestine and releases enterotoxins that impair the intestinal barrier function and trigger inflammatory responses.Although Bacillus licheniformis(B.licheniformis)has been reported to enhance intestinal health,it remains to be seen whether there is a functional role of B.licheniformis in intestinal inflammatory response in intestinal porcine epithelial cell line(IPEC-J2)when stimulated with ETEC F4.Methods:In the present study,the effects of B.licheniformis PF9 on the release of pro-inflammation cytokines,cell integrity and nuclear factor-κB(NF-κB)activation were evaluated in ETEC F4-induced IPEC-J2 cells.Results:B.licheniformis PF9 treatment was capable of remarkably attenuating the expression levels of inflammation cytokines tumor necrosis factor-α(TNF-α),interleukin(IL)-8,and IL-6 during ETEC F4 infection.Furthermore,the gene expression of Toll-like receptor 4(TLR4)-mediated upstream related genes of NF-κB signaling pathway has been significantly inhibited.These changes were accompanied by significantly decreased phosphorylation of p65 NF-κB during ETEC F4 infection with B.licheniformis PF9 treatment.The immunofluorescence and western blotting analysis revealed that B.licheniformis PF9 increased the expression levels of zona occludens 1(ZO-1)and occludin(OCLN)in ETEC F4-infected IPEC-J2 cells.Meanwhile,the B.licheniformis PF9 could alleviate the injury of epithelial barrier function assessed by the trans-epithelial electrical resistance(TEER)and cell permeability assay.Interestingly,B.licheniformis PF9 protect IPEC-J2 cells against ETEC F4 infection by decreasing the gene expressions of virulence-related factors(including luxS,estA,estB,and elt)in ETEC F4.Conclusions:Collectively,our results suggest that B.licheniformis PF9 might reduce inflammation-related cytokines through blocking the NF-κB signaling pathways.Besides,B.licheniformis PF9 displayed a significant role in the enhancement of IPEC-J2 cell integrity.

关键词： Bacillus licheniformis PF9 Barrier function ETEC F4 Inflammatory response IPEC-J2

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中国式现代国家建构视阈下云南“民族团结誓词碑”精神分析

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云南民族大学学报（哲学社会科学版） 2023年第1期40卷 60-69页

作者：廖林燕云南大学政府管理学院云南昆明650091

云南“民族团结誓词碑”,为观照中国式现代国家建构及其特色运用提供了一个典型案例。“誓词碑”精神,实质上就是“一心向党、爱国奉献、团结到底、命运与共”的精神,其精神之“魂”就在于“命运共同体”的精神。“誓词碑”精神的形成,... 详细信息

云南“民族团结誓词碑”,为观照中国式现代国家建构及其特色运用提供了一个典型案例。“誓词碑”精神,实质上就是“一心向党、爱国奉献、团结到底、命运与共”的精神,其精神之“魂”就在于“命运共同体”的精神。“誓词碑”精神的形成,同时贯穿了“情感塑魂”与“盟誓铸魂”双重逻辑。其中,“情感塑魂”是观礼代表的命运共同体意识得以建构的关键;“盟誓铸魂”则通过传统盟誓习俗的创新性发展与创造性利用,由此推动了自上而下建构起来的命运共同体意识向云南各民族的“信仰”升华。正是在“自上而下”的认同建构与“自下而上”的认同表达共同推动下,特别是情感型治理与中华优秀传统文化的创造性利用下,“誓词碑”精神对于促进命运共同体建设、支撑现代国家建构具有历史性的意义。从中鲜活展现了基于自身国情与传统推进现代国家建构的中国特色与中国智慧。

关键词：中国式现代国家建构 “民族团结誓词碑”精神中华民族共同体意识情感塑魂盟誓铸魂

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论裁判文书说理的积极修辞及其限度

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法学 2022年第3期 21-34页

作者：钟林燕中国政法大学

裁判文书中运用积极修辞技术进行说理以此达致说服听众的效果,目的在于得出更为合理和更具可接受性的判决。我国裁判文书说理以消极修辞为主,但并不排除积极修辞的运用,司法裁判的情理要求使积极修辞成为必要。最高人民法院指导性案例... 详细信息

裁判文书中运用积极修辞技术进行说理以此达致说服听众的效果,目的在于得出更为合理和更具可接受性的判决。我国裁判文书说理以消极修辞为主,但并不排除积极修辞的运用,司法裁判的情理要求使积极修辞成为必要。最高人民法院指导性案例中对积极修辞技术的运用较少;而地方法院裁判文书中对积极修辞的运用进行了大胆尝试。我国可以根据自身的实际情况,借鉴英美法系法官裁判说理的有益方面,注重语言技术知识与司法实践活动相结合,从而增强裁判文书的说理性;同时鼓励法官在说理时引述指导性案例,将法学理论与司法实践紧密结合,促进法官修辞说理的常态化,从而提高判决的可接受性。虽然运用积极修辞技术可以增强裁判文书的情感论证,保持司法领域与社会公众的有效沟通,但是需要给裁判文书说理中的积极修辞设定合理性界限,即逻辑的形式理性限度和可接受的价值理性限度,以防过度修辞或者滥用修辞导致负面影响。

关键词：裁判文书说理积极修辞技术价值判断合理性限度

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