mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Sulfonated fluorinated multi-block copolymer hybrid containing sulfonated(poly ether ether ketone) and graphene oxide: A ternary hybrid membrane architecture for electrolyte applications in proton exchange membrane fuel cells

A ternary hybrid membrane architecture consisting of sulfonated fluorinated multi-block copolymer (SFMC), sulfonated (poly ether ether ketone) (SPEEK) and 1 or 5 wt% graphene oxide (GO) was fabricated through a facile solution casting approach. The simple, but effective monomer sulfonation was performed for SFMC to create compact and rigid hydrophobic backbone structures, while conventional random sulfonation was carried-out for SPEEK. Hydrophilic-hydrophobic-hydrophilic structure of SFMC enhances the compatibility with SPEEK and GO and allows for an unprecedented approach to alter mechanical strength and proton conductivity of ternary hybrid membrane, as verified from universal test machine (UTM) curves and alternating current (AC) impedance plots. The impact of GO integration on the morphology and roughness of hybrid membrane was scrutinized using field emission scanning electron microscope (FE-SEM) and atomic force microscope (AFM). Ternary hybrid showed uniform intercalation of GO nanosheets throughout the entire surface of membrane with an increased surface roughness of 8.91 nm. The constructed ternary hybrid membrane revealed excellent water absorption, ion exchange capacity and gas barrier properties, while retaining reasonable dimensional stability. The well-optimized ternary hybrid membrane containing 5 wt% GO revealed a maximum proton conductivity of 111.9 mS/cm, which is higher by a factor of two-fold with respect to that of bare SFMC membrane. The maximum PEMFC power density of 528.07 mW/cm~2 was yielded by ternary hybrid membrane at a load current density of 1321.1 mA/cm~2 when operating the cell at 70℃ under 100% relative humidity (RH). In comparison, a maximum power density of only 182.06 mW/cm~2 was exhibited by the bare SFMC membrane at a load current density of 455.56 mA/cm~2 under same operating conditions.
Diketopyrrolopyrrole based D-π-A-π-D type small organic molecules as hole transporting materials for perovskite solar cells

Three novel diketopyrrolopyrrole (DPP) based small organic molecules were synthesized as hole transporting materials for perovskite solar cells. The effects of different donors and π bridges on the performance of perovskite solar cells (PSCs) were discussed. The efficiency of TPADPP-1, TPADPP-2, PTZDPP-2 was 5.10%, 9.85% and 8.16% respectively. Compared to TPADPP-2, the voltage of PTZDPP-2 was higher. Because the electron-donating ability of phenothiazine based donor was larger than that of triphenylamine based donor, the HOMO level of PTZDPP-2 was lower than that of TPADPP-2. The results indicated that the diketopyrrolopyrrole based D-π-A-π-D type small organic molecule might be a promising hole transporting material in the perovskite solar cells.
Cation engineering on lead iodide perovskites for stable and high-performance photovoltaic applications

Perovskite solar cells (PSCs) based on methylammonium lead iodide (CH_3NH_3PbI_3) have shown unprecedentedly outstanding performance in the recent years. Nevertheless, due to the weak interaction between polar CH_3NH_3~+ (MA~+) and inorganic PbI_3~- sublattices, CH_3NH_3PbI_3 dramatically suffers from poor moisture stability, thermal decomposition and device hysteresis. As such, strong electrostatic interactions between cations and anionic frameworks are desired for synergistic improvements of the abovementioned issues. While replacements of I~- with Br~- and/or Cl~- evidently widen optical bandgaps of perovskite materials, compositional modifications can solely be applied on cation components in order to preserve the broad absorption of solar spectrum. Herein, we review the current successful practices in achieving efficient, stable and minimally hysteretic PSCs with lead iodide perovskite systems that employ photoactive cesium lead iodide (CsPbI_3), formamidinium lead iodide (HC(NH_2)2PbI_3, or FAPbI_3), MA_(1-x-y-z)FA_xCs_yRb_zPbI_3 mixed-cation settings as well as two-dimensional butylammonium (C_4H_9NH_3~+, or BA~+)/MA~+, polymeric ammonium (PEI~+)/MA~+ co-cation layered structures. Fundamental aspects behind the stabilization of perovskite phases α-CsPbI_3, α-FAPbI_3, mixed-cation MA_(1-x-y-z)FA_xCs_yRb_zPbI_3 and crystallographic alignment of (BA)_2(MA)_3Pb_4I_(13) for effective light absorption and charge transport will be discussed. This review will contribute to the continuous development of photovoltaic technology based on PSCs.
Non-fullerene small molecule electron acceptors for high-performance organic solar cells

Fullerenes and their derivatives are important types of electron acceptor materials and play a vital role in organic solar cell devices. However, the fullerene acceptor material has some difficulties to overcome the intrinsic shortcomings, such as weak absorption in the visible range, difficulty in modification and high cost, which limit the performance of the device and the large-scale application of this type of acceptors. In recent years, non-fullerene electron acceptor material has attracted the attention of scientists due to the advantages of adjustable energy level, wide absorption, simple synthesis, low processing cost and good solubility. Researchers can use the rich chemical means to design and synthesize organic small molecules and their oligomers with specific aggregation morphology and excellent optoelectronic properties. Great advances in the field of synthesis, device engineering, and device physics of non-fullerene acceptors have been achieved in the last few years. At present, non-fullerene small molecules based photovoltaic devices achieve the highest efficiency more than 13% and the efficiency gap between fullerenetype and non-fullerene-type photovoltaic devices is gradually narrowing. In this review, we explore recent progress of non-fullerene small molecule electron acceptors that have been developed and led to highefficiency photovoltaic devices and put forward the prospect of development in the future.
Ultrafast selective extraction of hot holes from cesium lead iodide perovskite films

Lead halide perovskites have some unique properties which are very promising for optoelectronic applications such as solar cells, LEDs and lasers. One important and expected application of perovskite halide semiconductors is solar cell operation including hot carriers. This advanced solar cell concept allows overcoming the Shockley-Queisser efficiency limit, thereby achieving energy conversion efficiency as high as 66% by extracting hot carriers. Understanding ultrafast photoexcited carrier dynamics and extraction in lead halide perovskites is crucial for these applications. Here, we clarify the hot carrier cooling and transfer dynamics in all-inorganic cesium lead iodide (CsPbI_3) perovskite using transient absorption spectroscopy and Al_2O_3, poly(3-hexylthiophene-2,5-diyl) (P3HT) and TiO_2 as selective contacts. We find that slow hot carrier cooling occurs on a timescale longer than 10 ps in the cases of CsPbI_3/Al_2O_3 and CsPbI_3/TiO_2, which is attributed to hot phonon bottleneck for the high photoexcited carrier density. An efficient ultrafast hole transfer from CsPbI_3 to the P3HT hole extracting layer is observed. These results suggest that hot holes can be extracted by appropriate selective contacts before energy dissipation into the halide perovskite lattice and that CsPbI_3 has a potential for hot carrier solar cell applications.
Study on the Characters of Phase-Shifted Fiber Bragg Grating in Asymmetric Perturbation and Its Application in Fiber Laser Acoustic Sensor

A p phase-shifted fiber Bragg grating theoretical model is established,and the effects of an asymmetric and symmetrical perturbation field on a phase-shifted fiber Bragg grating are investigated in this paper.The trends of wavelength shifting caused by effective refraction index of phase shift grating in symmetric and asymmetric acoustic field are investigated in detail.Then,the fiber laser acoustic sensors packaged in asymmetric and symmetrical structures are designed and tested,respectively.The results show that the acoustic response of the wavelength of the distributed feedback (DFB) fiber laser (FL) in an asymmetric packaging structure is much more sensitive than in that in the symmetrical structure.The sensor packaged in the asymmetrical structure has a better low frequency (0 Hz-500 Hz) performance and a higher sensitivity than that in the symmetrical structure,and the sensitivity is improved about 15 dB in average and 32.7 dB in maximum.It provides a new method to improve the sensitivity of the fiber acoustic sensor.
Defect inspection of flip chip package using SAM technology and fuzzy C-means algorithm

Solder bumps are widely used in surface mount components, which provide electrical and mechanical connection between the chip/package and the substrate. As the solder bump getting smaller in dimension and pitch, it becomes more difficult to inspect the solder defects hidden in the IC package. In this paper, an intelligent inspection method using the scanning acoustic microscopy(SAM) and the fuzzy C-means(FCM) algorithm was investigated. A flip chip package of FA10 was chosen as the test sample. The SAM tests of FA10 were carried out in C-scan mode. The sub-image of every solder bump was segmented from the SAM image. The statistical features were then calculated and adopted for clustering of solder bumps using the FCM algorithm. The recognition results of FCM reached a high accuracy of 94.3%. The intelligent system is effective for defect inspection in high density packages.
Improved Baseline Correction Method Based on Polynomial Fitting for Raman Spectroscopy

Raman spectrum,as a kind of scattering spectrum,has been widely used in many fields because it can characterize the special properties of materials.However,Raman signal is so weak that the noise distorts the real signals seriously.Polynomial fitting has been proved to be the most convenient and simplest method for baseline correction.It is hard to choose the order of polynomial because it may be so high that Runge phenomenon appears or so low that inaccuracy fitting happens.This paper proposes an improved approach for baseline correction,namely the piecewise polynomial fitting (PPF).The spectral data are segmented,and then the proper orders are fitted,respectively.The iterative optimization method is used to eliminate discontinuities between piecewise points.The experimental results demonstrate that this approach improves the fitting accuracy.
Study on power generations and dynamic responses of the bistable straight beam and the bistable L-shaped beam

In this paper, a simplified model of the bistable piezoelectric cantilever beam with magnets is established, and the potential energy of the bistable system is analyzed. We have proposed the bistable L-shaped beam structure, which has the same geometry dimensions of the bistable straight beam in the first time. The comparative study on power generations and dynamic responses of the bistable straight beam and the bistable L-shaped beam plays an important role in exploring excellent piezoelectric generator. The experiment structure includes the base layer and the piezoelectric layer. The harmonic excitation is given to the system. Theoretical analysis results show that the potential energy function of the system has two obvious steady potential wells. In addition, the depth of the upper potential well is different from that of the lower potential well when the gravity potential energy is considered. Experimental results demonstrate that the power generation for the straight beam is better than that of the horizontally placed L-shaped beam when the excitation amplitude is 450 mV. There is the existence that the energy harvesting capacity of the bistable L-shaped beam is better than that of the bistable straight beam when the excitation amplitude is 400 mV. Furthermore, the power generation of the bistable L-shaped beam with the upper potential well is obviously better than that of the bistable L-shaped beam with the lower potential well. In addition, comparing with the straight beam, the dynamic response of the bistable L-shaped beam is more complex when the external excitation frequency is changed. It is also observed that the distance between the magnets has the obvious influence on the dynamic response of the bistable system. It is very effective to select the appropriate distance between the magnets to improve the power generation of the bistable energy harvester under the fixed excitation conditions.
Packaging and Temperature Compensation of Fiber Bragg Grating for Strain Sensing:A Survey

During last decades,sensor elements based on the fiber Bragg grating (FBG) have been widely studied and developed due to the advantages of immunity to electromagnetic interference,compact size,high precision,and so on.The FBG itself is sensitive to axial strain and temperature variation directly and can indirectly measure these complex physical parameters,such as pressure,displacement,and vibration,by using some specially designed elastic structures to convert them into the axial strain of the FBG.Whether the FBG is fixed on the measured object to measure the strain directly or fixed on an elastic structure body to measure other physical quantities,these types of FBGs could be collectively called as strain sensing FBGs.The packaging of the FBG has important influence on FBG characteristics that directly affect the measurement accuracy,such as strain transfer,temperature characteristic,and spectral shape.This paper summarizes the packaging methods and corresponding temperature compensation methods of the currently reported strain sensing FBGs,focusing especially on fully pasted FBG,pre-stretched FBG with double-end fixed,and metallic packaging.Furthermore,the advantages and drawbacks of different packaging methods have been analyzed,which can provide a reference for future researches.
The role of varied metal protrusions on the conductor surfaces in corona discharge subjected to DC high voltages

Conductor corona performance is significant in the evaluation of electromagnetic environment for high voltage power transmission lines. The influence of artificial contaminated conductors on corona discharge was studied and turned out to be complicated. The ionized field strength on the corona cage was measured by field mill. Meanwhile, photos of corona plumes were photographed and grayed to quantitate the corona discharge intensity. Subsequently, a calculation model for equivalent electric field strength coefficient was established to evaluate the discharge intensity of conductors in coaxial cylindrical electrode. It could be found the computational results achieved an agreement with the observed experimental phenomena. By means of simulation results, a reasonable explanation was given to the finding that the closer the distance between the two protrusions was, the lower the corona discharge intensity and higher corona inception voltage of the conductors would be. In summary, the distributions of corona sources played an important role in the corona discharge and this work would provide an important reference for the evaluation of corona effects on the surface of contaminated conductors.
Cryptotanshinone suppresses key onco-proliferative and drugresistant pathways of chronic myeloid leukemia by targeting STAT5 and STAT3 phosphorylation

C-Myc and signal transducer and activator of transcription(STAT) family proteins have been proposed to be important downstream genes of BCR-ABL, which characterizes most cases of chronic myeloid leukemia(CML). Here, we report a c-Myc pathway-targeted screening of seven natural anticancer compounds, in which we identified cryptotanshinone as a highly promising agent for CML therapy. Cryptotanshinone depletes c-Myc in CML by repressing the phosphorylation of STAT5. Decreased viability of K562 cells correlated with p-STAT5 suppression. Unexpectedly, imatinib activates rather than inhibits the phosphorylation of STAT3 in K562 cells. We demonstrated that cryptotanshinone, as a dual inhibitor of p-STAT5 and p-STAT3, can effectively block IL-6-mediated STAT3 activation and reverse BCR-ABL kinase-independent drug resistance. Moreover, we showed that the epigenetic rebalance between decreased BCR-ABL/STAT5/c-Myc and enhanced STAT3/multi-drug resistance(MDR) pathways is characteristic of the cancer stem cell-like property of K562/ADR. Simultaneously suppressing these two pathways using cryptotanshinone proves to be critical for the malignant network redress and MDR reversal of K562/ADR. These studies reveal the dual functions of cryptotanshinone that suppress key oncogenic proliferation and drug-resistant pathways in CML cells by targeting p-STAT5 and p-STAT3, providing a new strategy for CML therapy that takes advantage of natural products.
The miR-58 microRNA family is regulated by insulin signaling and contributes to lifespan regulation in Caenorhabditis elegans

microRNAs regulate diverse biological processes such as development and aging by promoting degradation or inhibiting translation of their target mRNAs. In this study, we have found that the miR-58 family microRNAs regulate lifespan in C. elegans. Intriguingly, members of the miR-58 family affect lifespan differently, sometimes in opposite directions, and have complex genetic interactions. The abundances of the miR-58 family miRNAs are up-regulated in the long-lived daf-2 mutant in a daf-16-dependent manner, indicating that these miRNAs are effectors of insulin signaling in C. elegans. We also found that miR- 58 is regulated by insulin signaling and partially required for the lifespan extension mediated by reduced insulin signaling, germline ablation, dietary restriction, and mild mitochondrial dysfunction. We further identified the daf-21, ins-1, and isw-1 mRNAs as endogenous targets of miR-58. Our study shows that miRNAs function in multiple lifespan extension mechanisms, and that the seed sequence is not the dominant factor defining the role of a miRNA in lifespan regulation.
志留纪初宜昌上升及其周缘龙马溪组黑色笔石页岩的圈层展布模式

渝东、鄂西和湘西北志留系兰多维列统鲁丹阶至埃隆阶下部的地层存在不同程度的缺失,因此这一地区性的抬升被称为宜昌上升.本文通过丰富的剖面地层资料,阐明了宜昌上升的时空分布模式.由于与之相关的龙马溪组底部黑色页岩的不同程度的缺失,关系到对其中赋存的页岩气的勘探,因此,宜昌上升的分布模型对该地区及其周缘页岩气的勘探开发布局有指导作用.本文与“黔渝地区志留系龙马溪组黑色页岩的阶段性渐进展布模式”一文,共同提供了中国中上扬子区奥陶-志留系之交黑色页岩地层的一个完整的分布模式.
雄安新区的三维地质结构:来自反射地震资料的约束

研究雄安新区的地质结构,将为地壳稳定性评估、城市规划和基础工程建设,探讨油气、地热、干热岩等能源、资源的赋存规律奠立重要基础.本文综合利用最新的高精度地震和深钻井资料,建立了雄安新区的地层系统;运用构造解析方法,精细刻画了研究区的断裂系统;应用平衡地质剖面技术,重建了研究区新生代以来的构造演化过程;根据次级断层发育特征和区域上活动地震的分布规律,探讨了雄安新区的构造活动性.研究表明,雄安新区地处冀中坳陷北部与中部的过渡、转换部位,发育3个区域性不整合面,据此在纵向上划分出4个构造层;受太行山山前断层、大兴断层、容城断层和牛东断层的共同作用,该区具有凸起和凹陷相间发育的构造格局,该构造格局和断裂分布特征对区内油气和地热资源的储集条件和富集规律有着重要的控制作用;它的断陷过程始于古近纪早期,并表现出明显的幕式特征,伸展量和伸展率均逐渐减小;次级断层发育特征和区域地震分布规律表明,雄安新区新近纪以来处于相对稳定的构造位置,而其以东的霸县凹陷等地区则具有明显的构造活动性.
基于SPEI的黄河流域干旱时空格局研究

干旱是对人类社会影响最为严重的自然灾害之一,在中国干旱灾害频发,严重威胁着人们的生存环境.黄河流域是中国各大流域中受干旱影响最严重的区域,所以对黄河流域旱情进行监测尤为重要.文章基于1961~2015年黄河流域124个站点的月值气象数据,以标准化降水蒸散指数SPEI作为干旱指标,应用极点对称模态分解ESMD方法对SPEI序列进行时频周期与趋势分解,运用B-G分割算法进行阶段划分,从干旱年际变化、季节变化、干旱频率和干旱强度等方面对黄河流域及其8个水资源分区的干旱时空格局进行研究.结果表明:(1)近55年来黄河流域的干旱呈显著增加趋势,SPEI倾向率为–0.148 (10a)~(-1),其中兰州至河口镇地区干旱化趋势最为明显(–0.214 (10a)~(-1));(2)黄河流域干旱具有准2.9年、准5年、准10.2年和准18.3年的周期特征,且可划分为3个阶段(1961~1996年、1997~2002年和2003~2015年),对应SPEI均值分别为0.20、–0.71和–0.21;(3)干旱频率从大到小依次为夏季>春季>秋季>冬季,均值分别为71.0%、47.2%、10.2%和6.9%;(4)干旱强度从大到小依次为夏季>春季>冬季>秋季,均值分别为0.93、0.40、0.05和0.04.
天然气水合物地层岩石物理模型构建

天然气水合物地震反射特征的识别和物性信息的定量提取存在多解性与不确定性,岩石物理模型是将水合物地层地球物理观测值地震信息定量转化为物性信息的桥梁,而传统的岩石物理模型少有对微观孔隙结构和孔隙充填水合物剪切性质的描述.文章针对孔隙充填和颗粒支撑两种微观分布模式的水合物地层,重点考虑水合物地层的微观孔隙结构以及水合物的剪切性质,基于等效介质理论定量描述地层矿物组分特征和孔隙连通性及形状,利用斑块饱和理论和广义Gassmann理论定量描述孔隙充填水合物的剪切性质,在此基础上构建了两种模式水合物地层的岩石物理模型,揭示了水合物地层宏观弹性性质与微观物理性质之间的定量关系.数值研究发现,纵横波速度比随孔隙度和水合物饱和度增大而减小;颗粒支撑模式地层的纵横波速度对水合物含量较为敏感,且孔隙越狭长,敏感性越高;孔隙充填模式地层的纵横波速度比在高水合物饱和度时对水合物组分剪切性质的敏感性更高.实验数据和神狐海域的实际资料应用结果表明,岩石物理模型可有效地计算水合物地层宏观弹性性质与微观物性特征之间的定量关系,提供常规测井中缺乏的横波速度信息,确定对水合物含量指示能力较强的弹性参数,可以根据实际数据求取水合物饱和度、孔隙纵横比等物性参数,为天然气水合物地层的定量解释和资源评价提供理论依据和数据支持.
孙枢院士学术成就简介

孙枢先生等介绍了对“数字地球”的不同学术理解和当前国内外数字地球发展重点领域或方向,同时展望了“数字地球”在全球变化研究中的应用前景;在实际应用方面指出在第四纪环境演变研究中要重视广泛应用对地观测技术,建立数据库,进而阐明全球变化的区域响应过程,揭示区域和全球变化过程中人与自然在其中的作用程度,为可持续发展模式的建立提供科学依据(孙枢和史培军,2000).
巨型流域水质量变化指标与极移变化的联系

至今人们对水质量变化与极移关系的认识主要是通过全球陆地水储量变化对地极变化的激发.鉴于陆地水储量在全球分布不均,区域水质量变化与地极移动的关系值得深入探索,然而迄今尚少有研究.另外,鉴于水储量变化的估算存在不确定性,从不同角度寻找水质量变化的表征指标有重要意义.文章选取位于90°W方向的世界第一大河亚马孙河流域为研究区,选用水汽、降水、径流、水储量变化多个衡量水质量变化的指标,研究了巨型流域水质量变化指标和极移的联系.通过采用Mann-Kendall方法、累积距平法和曲率法识别突变点,采用最小二乘法拟合判断趋势,采用傅里叶变换和EEMD方法识别周期,发现在1948~2011期间,在诸多指标中,水汽通量指标相对于其他指标总体上与极移的联系更紧密.具体表现在,降水和水汽通量存在极移拍频周期,水汽通量和降水与极移在0.05显著水平上存在共同M-K突变点(发生在1968年左右);水汽通量比其他指标与极移m_1、m_2分量的累积距平线趋势更一致;水汽通量和降水与极移m_1、m_2分量、振幅的相关性比其他指标与极移的相关性强(0.01显著水平).通过比较巨型流域水汽通量的激发、巨型流域陆地水储量变化的激发、全球陆地水储量变化的激发和观测激发,发现亚马孙河流域的水汽通量和水储量变化对地极的激发,都比全球水储量变化的激发,更显著地表现出“跟极移m_2分量的激发一致,跟极移m_1分量的激发不一致”的这个普适特点.为了更直观地展示水汽通量指标的大小,文章提出了巨型流域水汽赤道辐合带位置的新指标.研究结果表明,巨型流域是研究水质量变化和极移联系的新视角,其中水汽通量指标较其他水质量指标与极移关系更紧密,而新提出的巨型流域水汽赤道辐合带位置指标极具形象表达水质量变化和极移的关系的能力.
气候变化背景下1981~2010中国小麦物候变化时空分异

物候是气候变化可靠有力的指示物之一,作物物候变化及其影响机制研究对于应对气候变化和指导地区农业生产有重要意义.由于缺乏长时段连续观测数据,全国尺度的作物生长季内连续多个物候期的变化,尤其是物候期变化趋势的时空分异特征研究报道较少.本文基于全国4个小麦种植区内48个农业气象站1981~2010年的长序列物候观测记录,量化了小麦10个关键物候期和相应生长阶段长度的时空变化.结果表明,1981~2010年期间,在小麦生长季内气候显著变化背景下,小麦物候也发生了显著变化.在全国尺度,播种期、出苗期、三叶期和乳熟期平均推迟幅度分别为0.19、0.06、0.05和0.06d a~(-1);而分蘖期、拔节期、孕穗期、抽穗期、开花期和成熟期平均提前幅度依次为0.02、0.15、0.21、0.17、0.19和0.10d a~(-1);营养生长阶段长度和生长季长度分别平均缩短0.23和0.29d a~(-1),而生殖生长阶段长度平均延长0.06d a~(-1).不同种植区小麦物候期及生长阶段长度的变化趋势不尽相同.小麦生长季长度对生长季内气候因子变化敏感度的空间分异特征在春、冬小麦之间表现得尤为突出.春(冬)小麦生长季长度均随着生长季内平均温度上升而缩短(延长);所有种植区小麦生长季长度均随生长季内降水和日照时数增加而延长.其中,春小麦生长季长度对降水的敏感度小于冬小麦,但对日照时数的敏感度大于冬小麦.在进行农业生产管理时应因地制宜,充分考虑小麦物候变化及其对不同气候因子变化响应的空间分异特征.
Biogeographic and anthropogenic correlates of Aleutian Islands plant diversity: A machine-learning approach

This is the first comprehensive analysis of vascular plant diversity patterns in the Aleutian Islands to identify and quantify the impact of Aleutian Island distance dispersal barriers, geographical, ecological and anthropogenic factors. Data from public Open Access databases, printed floristic accounts, and from collections made by the primary author were used to develop an Aleutian floristic database. The most common plant distribution pattern was “an eastern origin community”, though it compared similarly to the “Western” and “Widespread” distribution pattern.Weestablished an ecological plant community composition class for each island, based on clustering species assemblage dissimilarity measurements(Jaccard Index), and a measurement of phylogenetic dissimilarity(UniFrac). We modelled these composition classes and species richness values in non-parametric algorithmic models and concepts(data cloning using machine learning, stochastic boosting- TreeNet) based on classic and Aleutians-specific island biogeography hypotheses. Plant species richness is strongly associated with the equilibrium model variables of area and island isolation, as well as distance to the Alaska Peninsula, and island total stream length. Species composition is strongly associated with the landmass groups during the last glacial maximum, maximum island elevation, island isolation and island area. Phylogenetic composition is associated with island area, distance from the islands to the Chukotka Peninsula, maximum island elevation, island geologic age, and island isolation. This study extends the equilibrium theory of island biogeography by including additional drivers of diversity during the Anthropocene, such as the landmass during the LGM, as well as factors that may be related to anthropogenic extinction rate.