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Optimize Purcell filter design for reducing influence of fabrication variation

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chinese Physics B 2024年第6期33卷 589-594页

作者：蔡晓周翼彪于文龙熊康林冯加贵 Gusu laboratory of Materials Suzhou 215123China Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of SciencesSuzhou 215123China

To protect superconducting qubits and enable rapid readout, optimally designed Purcell filters are essential. To suppress the off-resonant driving of untargeted readout resonators, individual Purcell filters are used for each readout ***, achieving consistent frequency between a readout resonator and a Purcell filter is a significant challenge. A systematic computational analysis is conducted to investigate how fabrication variation affects filter performance, through focusing on the coupling capacitor structure and coplanar waveguide(cPW) transmission line specifications. The results indicate that the T-type enclosing capacitor(Ec), which exhibits lower structural sensitivity, is more advantageous for achieving target capacitance than the c-type Ec and the interdigital capacitor(IDc). By utilizing a large-sized cPW with the T-type Ec structure, fluctuations in the effective coupling strength can be reduced to 10%, given typical micro-nanofabrication variances. The numerical simulations presented in this work minimize the influence of fabrication deviations, thereby significantly improving the reliability of Purcell filter designs.

关键词： superconducting circuit Purcell filter coplanar waveguide capacitor structure

DMA-Trans: A Difference Metric Attention with Position Distancebased Weighting for Transformer in Data Sequence Modeling of Industrial Processes

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DMA-Trans: A Difference Metric Attention with Position Dista...

基于Biomod2组合模型对入侵害虫杏鬃球蚧的潜在适生区预测

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作者： Ziyi Yang Xiaofeng Yuan Kai Wang Yalin Wang chunhua Yang Weihua gui School of Automation Central South University

Accurate feature extraction and quality variable prediction are critical problems for time sequences in industrial processes. However, industrial samples are often time-relevant and have strong correlations with each other that has different positional distance, making it challenging for conventional data-driven models like lSTM and Vanilla Transformer to capture these underlying features. In this paper, A Difference Metric Attention with Position Distance-based Weighting is proposed for Transformer(DMA-Trans) in industrial time series modeling. Firstly, the Difference Metric Attention is established to calculate the difference of query-key vector pair to measure the spatial similarity. In this fashion, the difference can accurately represent the similarity of vectors, compared with the original dot product by directly using any two vectors. Then, Positional Distancebased Weights are designed to capture the distance relevance of samples that have different positional distance. This information may help to extract more potential features because the closer samples tend to have higher relevance while there are weak correlations if samples are far in distance. The effectiveness of the DMA-Trans model is validated in industrial hydrocracking processes for c5 content in the light naphtha and the final boiling point of jet fuel.

关键词： Soft sensor Attention mechanism Dot product Quality prediction Transformer

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林业科学研究 2024年第4期37卷 136-147页

作者：郭发城马贵龙高桂珍新疆农业大学林学与风景园林学院新疆乌鲁木齐830052

[目的]杏鬃球蚧作为新入侵新疆野果林的多食性害虫,具备繁殖速度快、繁殖量大和扩散迅猛等特征,凸显其在生态系统中具备显著的生态适应性和竞争优势。其不仅对野杏危害严重,还对野果林及当地果园的生态环境和生物多样性造成重大威胁。... 详细信息

[目的]杏鬃球蚧作为新入侵新疆野果林的多食性害虫,具备繁殖速度快、繁殖量大和扩散迅猛等特征,凸显其在生态系统中具备显著的生态适应性和竞争优势。其不仅对野杏危害严重,还对野果林及当地果园的生态环境和生物多样性造成重大威胁。通过建立并比较不同类型影响因素下的物种分布模型获得杏鬃球蚧更准确的适生区分布。[方法]通过R语言Biomod2包集成建立物种分布模型(SDM),分别对仅基于气候因素和基于寄主和气候因素两种模式下的杏鬃球蚧分布格局进行预测,以期为入侵害虫制定综合防控策略提供理论依据。[结果]添加生物变量后的生态位结果与实际分布结果相符,剔除了仅基于气候因素下杏鬃球蚧在沙漠地区的扩张范围,避免了预测结果基础生态位比实际生态位大的问题,预测结果准确率更高,因此选用添加寄主因素的预测结果用于分析。在添加寄主因素后当前总适生区面积15.06×10^(5)km^(2),主要分布在与哈萨克斯坦交界处、天山北脉博罗科努山北麓和伊犁河谷等地;在2090s时期SSP5-85情景下总适生面积达到最大45.31×10^(5)km^(2)。在未来不同的气候情景下,杏鬃球蚧的总适生区均呈不同幅度的扩张趋势,在伊犁哈萨克自治州、博尔塔拉蒙古自治州、昌吉回族自治州、阿勒泰地区等地适生性显著提高。[结论]本研究构建的7种单一模型的组合模型,其AUc平均值达到0.97,TSS平均值达到0.88,预测准确度高;在添加寄主因素后适生区与实际更吻合,结果较仅添加气候因子更为可靠;预测结果为杏鬃球蚧在新疆的预警、监控和防治提供科学参考。

关键词：生物入侵杏鬃球蚧潜在分布生物变量气候变化

火炬树在北美和中国空间分布差异对比及防范入侵措施

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生态学报 2024年第4期44卷 1692-1699页

作者：林敬梧桂东伟中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室乌鲁木齐830011 中国科学院大学北京100049

火炬树原产于北美洲东部,引进中国后主要栽培于贫瘠土壤上,用于植树造林和保持水土。然而其入侵性和扩散能力较强,管控不当将会严重破坏侵入地生态系统的多样性。采用了GIS和MaxEnt模型相结合的方法,模拟了火炬树在北美和中国地区的适... 详细信息

火炬树原产于北美洲东部,引进中国后主要栽培于贫瘠土壤上,用于植树造林和保持水土。然而其入侵性和扩散能力较强,管控不当将会严重破坏侵入地生态系统的多样性。采用了GIS和MaxEnt模型相结合的方法,模拟了火炬树在北美和中国地区的适宜分布区域,分析了主要环境影响因素,并利用ROc曲线验证模型结果的准确度。研究结果表明:火炬树在北美和中国的适宜分布区域都主要集中在30°-40°N气候相对湿润地带;影响MaxEnt模型预测结果的关键环境因子都是气候因子;预测模型的AUc值都大于9。但两个地区的部分环境因子的阈值范围存在明显差异,说明在入侵中国后火炬树的气候空间和生态位发生了较大变化,对中国本地的生态系统构成一定威胁。可为防疫监测和林业部门的工作提供参考依据,有助于其制定早期预警和监管措施,从而有效防治中国地区火炬树的入侵和保护生物多样性。

关键词：火炬树 MaxEnt模型空间适宜分布入侵植物环境因子生态危害

Recent Advances in catalytic carbonylation Reactions in Alternative Reaction Media

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chinese Journal of chemistry 2024年第4期42卷 406-429页

作者： csaba Árvai lászló T.Mika Department of chemical and Environmental Process Engineering Faculty of Chemical Technology and BiotechnologyBudapest University of Technology and EconomicsMűegyetem rkp.3H-1111 BudapestHungary

Since the discovery of the hydroformylation(oxo-synthesis or Roelen reaction)and the Reppe-reaction,the transition metal-catalyzed carbonylation reactions,providing versatile,facile,and even atom-economic methods for the selective incorporation of c=O functionality to various skeletons,have gained tremendous importance in synthetic organic chemistry from laboratories to industrial *** carbonylation of carbon-carbon multiple bonds,aromatic halides,triflates,etc.,in the presence of various nucleophiles has led the way to produce aldehydes,carboxylic acids,esters,amides,etc.,in the fine chemical ***,these protocols usually proceed in conventional,fossil-based,and usually toxic reaction ***,several attempts have been directed to developing efficient carbonylation methods in alternative,less harmful,non-fossil-based and even in renewable reaction *** this review,we overview the recent applications of alternative solvents such as water,biomass-based alcohols,γ-valerolactone(GVl),2-methyltetrahydrofuran(2-MeTHF),ionic liquids(Ils),deep eutectic solvents(DES),alkyl levulinates,limonene,α-pinene,and dimethyl carbonate as well as fluorous media to improve efficiency,safety and environmentally benign nature of carbonylation protocols.

关键词： carbonylation catalysis Solvents Green chemistry carbon monoxide Transition metals Homogeneous catalysis Palladium

Research of surface-enhanced Raman scattering on Ag@PMBA@c@Au hybrid nanoparticles

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Optoelectronics letters 2024年第2期20卷 65-69页

作者： TAN Enzhong lÜ Suye liberal Study college Beijing Institute of Petrochemical TechnologyBeijing 102617China

Monodispersed, biocompatible, and readily-functionalized hybrid reporter-embedded core-shell nanopartilces(NPs) have been prepared in a simple route. This composite offers a potential platform for immunochemical detection using surface-enhanced Raman scattering(SERS) due to their high sensitivity, good stability and biocompatiblity. This also provides a new platform for insight into SERS enhancement mechanism.

关键词： mechanism. readily SERS

Genomic data and ecological niche modeling reveal an unusually slow rate of molecular evolution in the cretaceous Eupteleaceae

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Science china(life Sciences) 2024年第4期67卷 803-816页

作者： Kun-li Xiang Sheng-Dan Wu lian lian Wen-chuang He Dan Peng Huan-Wen Peng Xiao-Ni Zhang Hong-lei li Jia-Yu Xue Hong-Yan Shan gui-Xia Xu Yang liu Zhi-Qiang Wu Wei Wang State Key laboratory of Plant Diversity and Specialty crops Institute of BotanyChinese Academy of SciencesBeijing 100093China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureKey Laboratory of Synthetic BiologyLaboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China china National Botanical Garden Beijing 100093China State Key laboratory of Grassland Agro-Ecosystems and college of Ecology Lanzhou UniversityLanzhou 730000China University of chinese Academy of Sciences Beijing 100049China college of landscape Architecture and life Science/Institute of Special Plants Chongqing University of Arts and SciencesChongqing 402160China college of Horticulture Academy for Advanced Interdisciplinary StudiesNanjing Agricultural UniversityNanjing 210095China Fairylake Botanical Garden Shenzhen&Chinese Academy of SciencesShenzhen 518004China

living fossils are evidence of long-term sustained ecological ***,whether living fossils have little molecular changes remains poorly known,particularly in ***,we have introduced a novel method that integrates phylogenomic,comparative genomic,and ecological niche modeling analyses to investigate the rate of molecular evolution of Eupteleaceae,a cretaceous relict angiosperm family endemic to East *** assembled a high-quality chromosome-level nuclear genome,and the chloroplast and mitochondrial genomes of a member of Eupteleaceae(Euptelea pleiosperma).Our results show that Eupteleaceae is most basal in Ranunculales,the earliest-diverging order in eudicots,and shares an ancient whole-genome duplication event with the other *** document that Eupteleaceae has the slowest rate of molecular changes in the observed *** unusually low rate of molecular evolution of Eupteleaceae across all three independent inherited genomes and genes within each of the three genomes is in association with its conserved genome architecture,ancestral woody habit,and conserved niche *** findings reveal the evolution and adaptation of living fossil plants through large-scale environmental change and also provide new insights into early eudicot diversification.

关键词： conservation genomics eudicots evolutionary rates niche conservatism phylogenomics

Impact of Paenibacillus elgii supernatant on screening bacterial strains with potential for biotechnological applications

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Engineering Microbiology 2024年第3期4卷 1-15页

作者： I.c.cunha-Ferreira c.S.Vizzotto T.D.Frederico J.Peixoto l.S carvalho M.R.Tótola R.H.Krüger laboratory of Enzymology Department of Cellular BiologyUniversity of Brasília(UNB)Brasília70910-900Brazil laboratory of Environmental Sanitation Department of Civil and Environmental EngineeringUniversity of Brasília(UNB)Brasília70910-900Brazil laboratório de Biotecnologia e Biodiversidade para o Meio Ambiente Universidade Federal de Viçosa(UFV)Viçosa36570-900Brazil

The biotechnological industry faces a crucial demand for novel bioactive compounds,particularly antimicrobial agents,to address the rising challenge of bacterial resistance to current available *** strate-gies for cultivating naturally occurring microorganisms often limit the discovery of novel antimicrobial *** study presents a protocol for targeted selection of bacterial strains using the supernatant of Paenibacillus el-gii,which produces abundant signal molecules and antimicrobial *** samples were inoculated in these enriched culture media to selectively cultivate bacteria resistant to the supernatant,indicating their potential to produce similar *** bacterial strains isolated through this method were assessed for their antibac-terial *** addition,the functional annotation of the genome of one of these strains revealed several gene clusters of biotechnological *** study highlights the effectiveness of using this approach for selective cultivation of microorganisms with potential for biotechnological applications.

关键词： Prospecting Supernatant Antibacterial activity

cerebral small vessel disease modifies outcomes after minimally invasive surgery for intracerebral haemorrhage

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Stroke & Vascular Neurology 2024年第4期9卷 446-456,I0147页

作者： Yunke li Sung-Min cho Radhika Avadhani Hassan Ali Yi Hao Santosh B Murthy Joshua N Goldstein Fan Xia Xin Hu Natalie l Ullman Issam Awad Daniel Hanley Wendy c Ziai The George Institute for Global Health BeijingChina Department of Neurology Division of Neurocritical CareJohns Hopkins Medical InstitutionsBaltimoreMarylandUSA Department of Neurology Division of Brain Injury OutcomesJohns Hopkins Medical Institutions CampusBaltimoreMarylandUSA Department of Neurology Weill Cornell Medical CollegeNew YorkNew YorkUSA Department of Emergency Medicine Massachusetts General HospitalBostonMassachusettsUSA Department of Neurosurgery West China Hospital of MedicineChengduSichuanChina Department of Neurosurgery University of Chicago Pritzker School of MedicineChicagoIllinoisUSA

Background Minimally invasive surgery(MIS)for spontaneous supratentorial intracerebral haemorrhage(IcH)is controversial but may be beneficial if end-of-treatment(EOT)haematoma volume is reduced to≤15 *** explored whether MRI findings of cerebral small vessel disease(cSVD)modify the effect of MIS on long-term *** Prespecified blinded subgroup analysis of 288 subjects with qualified imaging sequences from the phase 3 Minimally Invasive Surgery Plus Alteplase for Intracerebral Haemorrhage Evacuation(MISTIE)*** tested for heterogeneity in the effects of MIS and MIS+EOT volume≤15 ml on the trial’s primary outcome of good versus poor function at 1 year by the presence of single cSVD features and cSVD scores using multivariable *** Of 499 patients enrolled in MISTIE III,288 patients had MRI,149(51.7%)randomised to MIS and 139(48.3%)to standard medical care(SMc).Median(IQR)IcH volume was 42(30–53)*** the full MRI cohort,there was no statistically significant heterogeneity in the effects of MIS versus SMc on 1-year outcomes by any specific cSVD feature or by cSVD scores(all P_(interaction)>0.05).In 94 MIS patients with EOT IcH volume≤15 ml,significant reduction in odds of poor outcome was found with cerebral amyloid angiopathy scorection)=0.006),absence of lacunes(OR,0.37(0.18–0.80);P_(interaction)=0.02)and absence of severe white matter hyperintensities(WMHs)(OR,0.22(0.08–0.58);P_(interaction)=0.03).conclusions Following successful haematoma reduction by MIS,we found significantly lower odds of poor functional outcome with lower total burden of cSVD in addition to absence of lacunes and severe *** features may have utility for prognostication and patient selection in clinical trials of MIS.

关键词： Surgery surgery absence