mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Feature selection for probabilistic load forecasting via sparse penalized quantile regression

Probabilistic load forecasting(PLF)is able to present the uncertainty information of the future loads.It is the basis of stochastic power system planning and operation.Recent works on PLF mainly focus on how to develop and combine forecasting models, while the feature selection issue has not been thoroughly investigated for PLF.This paper fills the gap by proposing a feature selection method for PLF via sparse L1-norm penalized quantile regression.It can be viewed as an extension from point forecasting-based feature selection to probabilistic forecasting- based feature selection.Since both the number of training samples and the number of features to be selected are very large, the feature selection process is casted as a large-scale convex optimization problem.The alternating direction method of multipliers is applied to solve the problem in an efficient manner.We conduct case studies on the open datasets of ten areas.Numerical results show that the proposed feature selection method can improve the performance of the probabilistic forecasting and outperforms traditional least absolute shrinkage and selection operator method.
The Payouts Choice for Deposit Insurance System

Entropy balancing is introduced to assess the deposit insurance design characteristics in this paper.Applying an extensive duration data including 141 countries from 1960 to 2015, the authors employ the entropy balancing method to simulate the data structure under the implicit deposit insurance system.Then the paper adopts an endogenous treatment effects model and a Heckman two-step selection model to examine payouts choice of the deposit insurance.It is found that entropy balancing can calibrate unit weights and reweight treatment and control groups by a maximum entropy scheme.Thus, a possibly given conditions will be satisfied and information concerning sample moments will be integrated.The results show clearly that different payouts choice and the corresponding coverage setting can effectively reduce the moral hazards that may result from the introduction of a deposit insurance scheme.When the Payouts is Per Depositor Account or Per Depositor, the banks' moral hazard is higher.However, the payment method of Per Depositor Per Institution can effectively restrain the banks' risk-taking activities.
Impacts of CO_2 elevation on the physiology and seed quality of soybean

Understanding the responses of crops to elevated atmospheric carbon dioxide concentrations (E[CO_2]) is very important in terms of global food supplies. The present study investigates the effects of CO_2 enrichment (to 800 mmol mol~(-1)) on the physiology of soybean plants and the nutritional value of their seeds under growth chamber conditions. The photosynthesis of soybean was significantly promoted by E [CO_2] at all growth stages, but leaf area and specific leaf weight were not affected. The levels of mineral elements in the leaves decreased under E[CO_2]. The soil properties after soybean cultivation under E[CO_2] were not affected, except for a decrease in available potassium. Moreover, the levels of soluble sugars in the seeds were not affected by E[CO_2], but the levels of natural antioxidants decreased. In addition, the level of oleic acid decreased under E[CO_2]. However, levels of fatty acid peroxidation and saturation were maintained. In conclusion, E[CO_2] appears to have positive effects on the growth of cultivated soybean plants, but its influence on the nutritional values of soybean seeds is complex.
Land cover change and eco-environmental quality response of different geomorphic units on the Chinese Loess Plateau

Land cover in the Chinese Loess Plateau has undergone dramatic changes since the late 1980s. Revealing the trend in land cover change and eco-environmental quality response of different geomorphic units in this stage is a realistic requirement for promoting sustainable development of the Chinese Loess Plateau. Based on the data of geomorphic units and land cover in 1990, 2000, 2010 and 2018 of the Chinese Loess Plateau, we studied the trend of land cover change and eco-environmental quality response of different geomorphic units by using a significance index of land cover change, a proportion index of land cover change and an eco-environmental response model. The results indicated that from 1990 to 2018, the areas of forestland and construction land substantially increased, whereas those of cropland, grassland, wetland and unused land considerably decreased. Land cover change exhibited large geomorphic differences, and the main conversion of land cover was from cropland into other land types. Unstable trend of land cover change in the loess tablelands and sandy loess hills declined, whereas the unstable trends in the other geomorphic units enhanced. Eco-environmental quality varied among different geomorphic units. The expansion of construction land and degradation of forestland, grassland and wetland resulted in the deterioration of eco-environmental quality. The conversion of cropland and unused land into forestland and grassland, and the conversion of grassland into forestland were the main factors that drove the improvement of eco-environmental quality. The findings of this study may provide theoretical reference and support decision making for the optimization of land use structure and the improvement of eco-environmental quality on the Chinese Loess Plateau.
Enhancement of photocatalytic activity by femtosecond-laser induced periodic surface structures of Si

Laser induced periodic surface structures (LIPSS) represent a kind of top down approach to produce highly reproducible nano/microstructures without going for any sophisticated process of lithography.This method is much simpler and cost effective.In this work,LIPSS on Si surfaces were generated using femtosecond laser pulses of 800 nm wavelength.Photocatalytic substrates were prepared by depositing TiO_2 thin films on top of the structured and unstructured Si wafer.The coatings were produced by sputtering from a Ti target in two different types of oxygen atmospheres.In first case,the oxygen pressure within the sputtering chamber was chosen to be high (3×10~(-2) mbar) whereas it was one order of magnitude lower in second case (2.1×10~(-3) mbar).In photocatalytic dye decomposition study of Methylene blue dye it was found that in the presence of LIPSS the activity can be enhanced by 2.1 and 3.3 times with high pressure and low pressure grown TiO_2 thin films,respectively.The increase in photocatalytic activity is attributed to the enlargement of effective surface area.In comparative study,the dye decomposition rates of TiO_2 thin films grown on LIPSS are found to be much higher than the value for standard reference thin film material Pilkington Activ~(TM).
Forecasting Method of Stock Market Volatility in Time Series Data Based on Mixed Model of ARIMA and XGBoost

Stock price forecasting is an important issue and interesting topic in financial markets. Because reasonable and accurate forecasts have the potential to generate high economic benefits, many researchers have been involved in the study of stock price forecasts. In this paper, the DWT-ARIMA-GSXGB hybrid model is proposed. Firstly, the discrete wavelet transform is used to split the data set into approximation and error parts. Then the ARIMA (0,1,1),ARIMA (1,1,0), ARIMA (2,1,1) and ARIMA (3, 1,0) models respectively process approximate partial data and the improved xgboost model (GSXGB) handles error partial data. Finally, the prediction results are combined using wavelet reconstruction. According to the experimental comparison of 10 stock data sets, it is found that the errors of DWT-ARIMA-GSXGB model are less than the four prediction models of ARIMA, XGBoost, GSXGB and DWT-ARIMA-XGBoost. The simulation results show that the DWT-ARIMA-GSXGB stock price prediction model has good approximation ability and generalization ability, and can fit the stock index opening price well. And the proposed model is considered to greatly improve the predictive performance of a single ARIMA model or a single XGBoost model in predicting stock prices.
AoA-Based Channel Estimation for Massive MIMO OFDM Communication Systems on High Speed Rails

Channel estimation is a well-known challenge for wireless orthogonal frequency division multiplexing (OFDM) communication systems with massive antennas on high speed rails (HSRs). This paper investigates this problem and design two practicable uplink and downlink channel estimators for orthogonal frequency division multiplexing (OFDM) communication systems with massive antenna arrays at base station on HSRs. Specifically, we first use pilots to estimate the initial angle of arrival (AoA) and channel gain information of each uplink path through discrete Fourier transform (DFT),and then refine the estimates via the angle rotation technique and suggested pilot design. Based on the uplink angel estimation, we design a new downlink channel estimator for frequency division duplexing (FDD) systems. Additionally, we derive the Cramer-Rao lower bounds (CRLBs) of the AoA and channel gain estimates. Finally, numerical results are provided to corroborate our proposed studies.
男男性行为者沙眼衣原体和淋病奈瑟菌感染筛查

对淋病患者进行调查发现10%~15%的男性临床无症状,而89.1%的咽部感染和61.9%的直肠感染者却没有局部相关症状发生。因此,在临床工作和健康教育中不应忽视直肠淋病及其他无症状淋病。生殖道沙眼衣原体(Chlamydia trachomatis,CT)感染者中,有50%~70%男性无症状,如不及时治疗可引起男性尿道炎、附睾炎等。生殖道CT及淋病奈瑟菌(Neisseria gonorrhoeae,NG)感染既可以促使人类免疫缺陷病毒(HIV)传播,又可以增加其易感性,而且症状的隐匿性更增加了感染在人群中传播的几率。由于其特殊性,欧州很多国家都对其进行定期筛查。我国对有高危性行为的男男性接触者(men who have sex with men,MSM)的筛查刻不容缓,本文对2014年1月至2018年12月门诊MSM患者进行CT和NG进行主动筛查,并分析筛查情况、流行病特征,为制定预防与控制措施提供科学依据。
国外脑卒中患者重返工作岗位的干预研究进展

重返工作岗位(Return to work,RTW)指患者因伤病而离开工作岗位后又重新回到工作岗位上,并继续承担相应的工作任务的行为[1]。RTW是脑卒中患者康复和回归正常生活的重要标志[2]。国外针对脑卒中患者RTW的研究日益增多,相关干预研究也逐渐得到重视。目前,国内对于脑卒中患者重返工作岗位的研究处于起步阶段,相关干预研究则更为缺乏。本研究对国外脑卒中患者RTW干预相关的理论模型和具体研究进行回顾,以期为国内卫生、社会行业工作者进行相关研究和干预提供参考。
肝脏炎性假瘤样滤泡树突细胞肉瘤1例

综上所述,IPT-like FDCS罕见且无特异性的临床表现。临床工作中,对于进展缓慢、疑诊恶性疾病的肝脏占位性病变,需鉴别肉瘤;对于疑难肝病,可综合运用归纳法、排除法等,遵循先定感染、非感染性及良、恶性、再找起源的思路,加强临床与病理的沟通交流,不断拓展和完善诊断思路。
44例原发性骨巨细胞瘤初次手术治疗临床研究

[目的]探讨原发性骨巨细胞瘤初次手术方式与复发的关系。[方法]2014年1月~2018年4月44例原发性骨巨细胞瘤初次手术治疗,包括囊内病灶刮除植骨或骨水泥填充术,边缘切除术、广泛切除术。[结果]44例患者获得12~56个月随访,5例复发,1例出现肺转移,总复发率为11.36%,肺转移率2.27%。行囊内病灶刮除植骨术18例,2例复发,复发率11.11%。行囊内病灶刮除骨水泥填充术22例,3例复发,复发率13.63%。植骨组与骨水泥组复发率差异无统计学意义(P>0.05)。2例行边缘切除术、2例行广泛切除术病例均无复发。本组中8例合并病理骨折的病例中1例复发,复发率12.50%。无病理骨折组复发率11.11%,两组复发率差异无统计学意义(P>0.05)。[结论]骨巨细胞瘤CampanacciⅠ、Ⅱ级及大部分III级病例,都可以行囊内切除,主要是扩大刮除加辅助处理瘤床,得到良好的局部控制。
Competition Numbers and Phylogeny Numbers of Connected Graphs and Hypergraphs

Let D be a digraph. The competition graph of D is the graph having the same vertex set with D and having an edge joining two diﬀerent vertices if and only if they have at least one common out-neighbor in D. The phylogeny graph of D is the competition graph of the digraph constructed from D by adding loops at all vertices. The competition/phylogeny number of a graph is the least number of vertices to be added to make the graph a competition/phylogeny graph of an acyclic digraph. In this paper, we show that for any integer k there is a connected graph such that its phylogeny number minus its competition number is greater than k. We get similar results for hypergraphs.
Monte Carlo simulation of lattice analysis of complex LaCeTh_(0.1)CuO_y using ion bombardment technique

Ion bombardment analysis of perovskite materials is challenging owing to their peculiar structure.This shortcoming renders the reliability on the technique somewhat questionable.In this research,three structured modifications (i.e.,scan angle,low energy,and large ion bombardment) were adopted to improve the ion bombardment analysis of 99,999 ions using Monte Carlo simulations.The modified technique was used to analyze the effects of a chemically pressurized ‘‘A’’ site in the perovskite lattice system.The LaCeTh_(0.1)Cu_2O_y compound was used in this experiment.Despite the low probing energy,it was observed that the high number of ions bombarding the material resulted in external pressure on the lattice structure of the material.Moreover,the chemically pressurized ‘‘A’’ site perovskite material was characterized by lattice mismatch,lattice fluctuations,grain boundary collapse,and oxygen displacement.The novel discovery of this research is the inter-and intra-extended lattice mismatches that are likely to connect.Hence,further investigation of the connection between inter-and intraextended lattice mismatches is recommended as they may enable fabrication of room-temperature superconductors.
miR- 451在消化系统肿瘤中的研究进展

miRNA是一类高度保守的非编码调控的单链小分子 RNA,能够在转录后水平调控一些人类必需基因的表达,并参与多种信号通路,发挥重要的生物学作用。miR-451位于17号染色体q11. 2,是近年新发现的、具有抑癌作用的miRNA,在多种恶性肿瘤组织中异常表达,尤其是在消化系统肿瘤中异常表达。miR-451与肿瘤的增殖、侵袭、转移和预后密切相关,有望成为肿瘤治疗的标志物和新靶点。
2019年度地球科学部基金项目评审工作综述

2019年,地球科学部及时落实党中央和国家自然科学基金委员会(以下简称“自然科学基金委”)党组部署,在分管委领导和科学部主任的带领下,齐心协力对科学基金评审工作进行了全方位的管理探索和实践,圆满完成了2019年度的地球科学领域基金评审工作。特别是在地球科学领域建立了全新的科技人才类项目评审要点和重大类项目评审要点,在破除科技评价体系“四唯”不足的同时,及时树立了优选科学基金项目和人才的全新标准,得到中国科技界的广泛认同。重大项目的立项改革试点,既达到了结合地球科学发展战略加强顶层设计,优化资源配置,统筹项目布局,鼓励竞争择优,充分发挥领域科学家、学部咨询委和学科管理专家等三方面作用的目的,又有机结合了“自下而上”和“自上而下”凝练重大科学问题的各自优势。“战略性关键金属超常富集成矿动力学”重大研究计划,以及“川藏铁路重大基础科学问题”“极地基础科学前沿”“嫦娥四号任务科学研究”三个专项的评审和资助工作,是针对国家重大需求的通过顶层设计凝练科学问题的有益探索,是坚持基金基础研究两条腿走路的成功尝试。
早期结直肠癌与癌前病变的精准筛查方法

结直肠癌有较明确的癌前病变,进展成为癌需要约5~10年甚至更长的时间,有较充分时间进行早期诊断。应加强对其癌前病变及早期癌的预警、预防和精准筛查、诊治全链条研究,包括继续探索结直肠早癌及癌前病变的危险因素,监控高危人群,寻找更加简便、成本效益优越、接受度高、敏感性、特异性最佳的筛查方法,应用于人群筛查,以期提高结直肠早癌及癌前病变检出率,降低结直肠癌发病率及死亡率。
涂片回收细胞蜡块的制备技术及临床应用价值

随着现代医学技术的发展,细胞学样本的临床应用价值不断提升,如何在1~2张的细胞学涂片极端条件下,满足复杂的临床诊治需求,值得探寻。该文作者通过涂片回收细胞蜡块技术,收集痰及胰腺、肺经超声内镜引导下穿刺获得的手工及液基细胞学涂片上的细胞进一步开展免疫组织化学,验证了该技术在诊断中的应用价值;并以此为切入点,详细介绍了涂片回收细胞蜡块的制备流程及潜在的影响因素,以促进该技术在国内的推广和应用。
Prostate cancer risk prediction models in Eastern Asian populations: current status, racial difference, and future directions

Prostate cancer (PCa) risk calculators (RCs) with prostate-specific antigen (PSA) and other risk factors can greatly improve the accurate prediction of potential risk of PCa compared to PSA. The European Randomized Study of Screening for PCa Risk Calculator (ERSPC-RC) and the Prostate Cancer Prevention Trial Risk Calculator (PCPT-RC) are developed on the Western population. However, the Western RCs showed limited diagnostic efficacy in the Eastern Asian population, mainly due to racial differences between the two populations. We aimed to review the application of Western RCs and Eastern Asian RCs in Eastern Asian cohorts and to identify the characteristics and efficacy of these RCs.
Vegetation—environment relationship in Pinus wallichiana forests of the Swat Hindukush range of Pakistan

Understanding the influence of environmental variables on the spatial distribution of ecological communities is essential to predict the response of vegetation to various environmental drivers. Ecological theory suggests that multiple environmental factors shape local species assemblages and should influence the various components of community structure and composition in different ways. This study aimed to classify Pinus wallichiana dominated forests in the Swat Hindukush range mountains to understand the relative influence of multiple environmental filters on its composition and structure. These forests represent the most typical of the species distribution in northern Pakistan and were not subjected to any phytosociological study. For this purpose, thirty forest stands, spanning a wide range of physical habitats were sampled using 10 x 10 m plots and the importance value index was calculated. The floristic and environmental data were subjected to Ward's agglomerative cluster analysis for objective classification and ordinated with NMS ordination for pattern description and testing the vegetation-environmental relationships. Three floristically and ecologically distinct communities were recognized along the topographic gradient (elevation, r = 0.377; slope, r = 0.5548) coupled with soil physical (clay, r = 0.2782; silt, r = 0.3225) and chemical properties (pH, r = 0.4975; lime, r = 3982). An elevation gradient of 100 m separated the low (Pinus wallichiana - Quercus dilatata community) and middle elevations forest stands (P. wallichiana pure population) from the highland population type (Pinus wallichiana-Cedrus deodara community). The floristics and structure of these forest types respond directly or indirectly to topographic and soil variables which were evidenced from the floristic composition, species richness, and community physiognomy. These characteristics of the communities changed from heterogenous, dense stands to sparsely dispersed conifers, broadleaved-evergreen, and deciduous vegetation types along the environmental gradients. We concluded that several factors explained the spatial pattern. Thus, we predict that elevation coupled with soil physical and chemical properties could be considered if the ultimate goal is the restoration and conservation of these forests. We also recommend broad-scale phytosociological study on P. wallichiana forests including multiple sampling from diverse locations to define the floristic diversity and to better understand its ecological requirements.
Status,structure and environmental variations in semi-arid mangroves of India

The semi-arid mangroves of the Gulf of Kachchh, the largest ecosystems on the west coast of India, are poorly studied in terms of vegetation structure and environmental parameters in spite of their conservation significance. Therefore, it is necessary to document the structural features of these mangroves in view of ongoing coastal industrial development. Mangrove forest structure in 10 locations on the northern and southern coasts of the Gulf of Kachchh were assessed using the line intercept transect method. Descriptions included density of young and mature age classes, tree heights, diameters at breast height (DBH) and aboveground biomass, along with seven significant environmental variables. Mature tree densities ranged from 350 to 1567 ind. ha-1, while average height and girth at breast height ranged from 1.0 to 6.8 m and 3.0 to 137.0 cm, respectively. The majority of trees (55.6%) were in ≤ 1.8 m height class followed by a 1.9 to 2.4 m class (25.1%). DBH was most often in class 2 cm or lower than that. Among the canopy index classes, more trees were recorded in class ≤ 2 cm. The regeneration density was greater than the recruitment class. This study indicates that the poor structural attributes of Avicennia marina Vierth. var. acutissima Stapf and Mold dominated mangroves are largely due to aridity induced by scarce and erratic rainfall and high soil and water salinities. The results should be valuable in conserving and sustainably managing these mangroves in the face of developmental activities.
Yield-density effects on growth and biomass partitioning in Leucaena leucocephala seedlings

Experiments were conducted to study the effects of density on growth and biomass partitioning of Leucaena leucocephala seedlings. Four plantations with densities of 10,000,20,000, 40,000, and 80,000 seedlings ha-1 were evaluated only from 15 to 25 months after planting. At 15 months, crown height and width decreased with increasing density. Seedling height/dbh ratios increased with increasing density. Biomass increased with greater density according to the yield-density effect equation, which was evident for all densities. With increasing age, biomass division to branches and leaves increased, whereas partitioning to roots decreased in the 10,000 and 20,000 seedlings ha-1 plantings. Partitioning to branches and leaves remained relatively steady, while partitioning to roots increased in the 40,000 and 80,000 seedlings ha-1 plantings. Biomass division into stem and bark components remained relatively steady in all densities. Yield-density and organ yield-density curves shifted upward with increasing seedling age on a log-log graph throughout the experimental period.
Modelling tree mortality across diameter classes using mixedeffects zero-inflated models

The mortality of trees across diameter class model is a useful tool for predicting changes in stand structure. Mortality data commonly contain a large fraction of zeros and general discrete models thus show more errors. Based on the traditional Poisson model and the negative binomial model, different forms of zero-inflated and hurdle models were applied to spruce-fir mixed forests data to simulate the number of dead trees. By comparing the residuals and Vuong test statistics, the zero-inflated negative binomial model performed best. A random effect was added to improve the model accuracy; however, the mixed-effects zero-inflated model did not show increased advantages. According to the model principle, the zeroinflated negative binomial model was the most suitable, indicating that the “0” events in this study， mainly from the sample “0”，i.e.， the zero mortality data，are largely due to the limitations of the experimental design and sample selection. These results also show that the number of dead trees in the diameter class is positively correlated with the number of trees in that class and the mean stand diameter, and inversely related to class size, and slope and aspect of the site.
Nodule study in Albizia chinensis in relation to nitrogen metabolism, morphology and biomass

Morphology, biomass, nitrate reductase (NR) and nitrogenase activity in Albizia chinensis (Osb.) Merr. nodules were assessed on monthly and seasonal basis for 1 year. Average NR and nitrogenase activity was higher during the rainy season, reaching a maximum in August. Thereafter, activity decreased through autumn and reached a minimum value during winter. Fresh and dry biomass of nodules increased gradually from summer to the rainy season and then started decreasing with the onset of winter as nodules began to senesce. Among four developmental stages of the nodules that correspond to their increasing age, NR and nitrogenase activity remained low in stage 1 nodules and peaked in stage 2. The activity of both enzymes further decreased with increasing age (stage 2 to stage 4). Morphological features such as shape, diameter and color varied considerably among the developmental stages. Stage 1 nodules were cream-colored, oval to heartshaped with smallest average diameter whereas at stage 2, they became bilobed to tetralobed. On the other hand, stage 3 nodules had the largest average diameter and were multilobed in structure. Stage 4 nodules that correspond to the senescing stage were dark brown to black, multilobed, flattened and hollow due to degeneration of nodular tissue.
Expression of BpPIN is associated with IAA levels and the formation of lobed leaves in Betula pendula 'Dalecartica'

Auxin polar transport genes PIN (PIN-FORMED) determine the concentration gradient of auxin in plants. To understand the relationship between the development of different tissues in Betula pendula ‘Dalecartica', BpPIN gene expression and indole-3-acetic acid (IAA) content were analyzed using qRT-PCR, ELISA, and GUS staining. Gene expression of BpPIN genes and IAA levels in the leaves, buds, stems, xylem, and roots of B. pendula 'Dalecartica' and B. pendula as a control were measured. BpPIN1, BpPIN5 and BpPIN6 were upregulated during development in both species, suggesting a dominant role in the development of B. pendula 'Dalecartica' leaves. Moreover, BpPIN1 gene expression was positively associated with IAA levels during leaf, vein and petiole development in B. pendula ‘Dalecartica’ only. The correlation coefficient of the first three leaves was 0.69 (P = 0.04),while that of the first three petioles was 0.85 (P = 0.001). In addition, GUS staining of the pro-DR5::GUS transgenic line of cultivar was correlated with the results of BpPIN1 expression. Overall, these findings suggest that BpPIN1 is associated with the formation of lobed leaves in B. pendula ‘Dalecartica'.