mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Dynamic Response of 6MW Spar Type Floating Offshore Wind Turbine by Experiment and Numerical Analyses

The floating offshore wind turbine (FOWT) is widely used for harvesting marine wind energy. Its dynamic responses under offshore wind and wave environment provide essential reference for the design and installation. In this study, the dynamic responses of a 6MW Spar type FOWT designed for the water depth of 100 m are investigated by means of the wave tank experiment and numerical analysis. A scaled model is manufactured for the experiment at a ratio of 65.3, while the numerical model is constructed on the open-source platform FAST (Fatigue, Aerodynamics, Structures, and Turbulence). Still water tests, wind-induced only tests, wave-induced only tests and combined windwave- current tests are all conducted experimentally and numerically. The accuracy of the experimental set-up as well as the loading generation has been verified. Surge, pitch and heave motions are selected to analyze and the numerical results agree well with the experimental values. Even though results obtained by using the FOWT calculation model established in FAST software show some deviations from the test results, the trends are always consistent. Both experimental and numerical studies demonstrate that they are reliable for the designed 6MW Spar type FOWT.
Predicting Loads and Dynamic Responses of An Offshore Jacket Wind Turbine in A Nonlinear Sea

In order to improve the simulation efficiency, a novel transformed linear Gaussian model has been first proposed in this paper for generating equivalent “nonlinear” irregular waves. It is demonstrated by calculation examples that for obtaining equivalent “nonlinear” waves with the same accuracy, the transformed linear Gaussian model is about 2.7 times faster than the traditional nonlinear simulation method and is about 2.14 times faster than the method proposed by Agarwal and Manuel (2011). The loads and dynamic responses calculation results regarding an offshore jacket wind turbine in this paper demonstrate that nonlinearly simulated irregular waves with bottom effects should be considered in order to design an un-conservative support structure for the offshore wind turbine. Furthermore, by studying the calculation results in this article we have found that the loads and dynamic responses of the offshore wind turbine when inputting transformed linearly simulated waves with bottom effects are almost identical to the corresponding values when inputting nonlinearly simulated waves with bottom effects. All these calculation results clearly demonstrate the superiority and effectiveness of using our novel transformed linear Gaussian model for predicting the wave loads and dynamic responses of an offshore wind turbine operating in a realistic nonlinear sea with bottom effects.
Opposing Trends of Winter Cold Extremes over Eastern Eurasia and North America under Recent Arctic Warming

Under recent Arctic warming, boreal winters have witnessed severe cold surges over both Eurasia and North America, bringing about serious social and economic impacts. Here, we investigated the changes in daily surface air temperature (SAT) variability during the rapid Arctic warming period of 1988/89-2015/16, and found the daily SAT variance, mainly contributed by the sub-seasonal component, shows an increasing and decreasing trend over eastern Eurasia and North America, respectively. Increasing cold extremes (defined as days with daily SAT anomalies below 1.5 standard deviations) dominated the increase of the daily SAT variability over eastern Eurasia, while decreasing cold extremes dominated the decrease of the daily SAT variability over North America. The circulation regime of cold extremes over eastern Eurasia (North America) is characterized by an enhanced high-pressure ridge over the Urals (Alaska) and surface Siberian (Canadian) high. The data analyses and model simulations show the recent strengthening of the high-pressure ridge over the Urals was associated with warming of the Barents-Kara seas in the Arctic region, while the high-pressure ridge over Alaska was influenced by the offset effect of Arctic warming over the East Siberian-Chukchi seas and the Pacific decadal oscillation (PDO)-like sea surface temperature (SST) anomalies over the North Pacific. The transition of the PDO-like SST anomalies from a positive to negative phase cancelled the impact of Arctic warming, reduced the occurrence of extreme cold days, and possibly resulted in the decreasing trend of daily SAT variability in North America. The multi-ensemble simulations of climate models confirmed the regional Arctic warming as the driver of the increasing SAT variance over eastern Eurasia and North America and the overwhelming effect of SST forcing on the decreasing SAT variance over North America. Therefore, the regional response of winter cold extremes at midlatitudes to the Arctic warming could be different due to the distinct impact of decadal SST anomalies.
深入实施健康扶贫工程,努力实现贫困人口基本医疗有保障

健康是脱贫和可持续发展的基础与动力。习近平总书记深刻指出,“没有全民健康,就没有全面小康”,健康扶贫是打赢脱贫攻坚战的关键举措。党的十八大以来,国家卫生健康委员会深入学习领会习近平总书记关于扶贫工作的重要论述,认真贯彻党中央、国务院脱贫攻坚决策部署,落实精准扶贫精准脱贫基本方略,深入推进实施健康扶贫工程,努力保障农村贫困群众公平享有基本医疗卫生服务。
Characterization of a broad substrates specificity acyl-CoA: diacylglycerol acyltransferase 1 from the green tide alga Ulva prolifera

Triacylglycerols (triglycerides, TAGs) are the major carbon and energy storage forms in various organisms, and important components of cellular membranes and signaling molecules; they have essential functions in multiple physiological processes and stress regulation. Acyl-CoA: diacylglycerol acyltransferase (DGAT) catalyzes the final and only committed acylation step in the synthesis of TAGs in eukaryotes. The present work identified and isolated a novel gene, UpDGAT1, from the green tide alga Ulva prolifera. The activity of UpDGAT1 was confirmed by heterologous expression in a Saccharomyces cerevisiae TAG-deficient quadruple mutant. Results of thin-layer chromatography and BODIPY staining indicated that UpDGAT1 was able to restore TAG synthesis and lipid body formation in the yeast. Lipid analysis of yeast cells revealed that UpDGAT1 showed broad substrate specificity, accepting saturated as well as mono- and polyunsaturated acyl-CoAs as substrates. High salinity and high temperature stresses increased UpDGAT1 expression and TAG accumulation in U. prolifera. The present study provides clues to the functions of UpDGAT1 in TAG accumulation in, and stress adaptation of, U. prolifera.
Formation of the modern scenic city of Hangzhou: towards conservation integrated urban planning, 1950s-1990s

From the 1950s to the 1990s, China underwent a significant transformation of its political system and economy, from socialism to rapid development after the reform and opening up. In the 1980s and 1990s, to meet the demand for housing and urban modernization under the rapid growth of cities, almost all Chinese cities underwent large-scale urban construction, transformation and expansion. With this background of rapid advancement, many cities have lost their traditional urban features and characteristics. However, it was during this period that Hangzhou not only restored the historical scenery of West Lake through multiple projects but also explored overall planning of the city and introduced conservation ideas, making West Lake, which was originally located outside the city, part of the city. This period also shaped the contemporary urban characteristics of Hangzhou with traditional landscape features. To explore Hangzhou's positive experience and determine the critical junctures and influencing factors, this study observed the entire historical process using morphological methods. Based on a summary of the characteristics of each development stage, this study further focuses on the key issue of how conservation ideas are gradually introduced into urban planning and affect the development process.
Fault Diagnosis of Photovoltaic Array Based on Deep Belief Network Optimized by Genetic Algorithm

When using deep belief networks (DBN) to establish a fault diagnosis model, the objective function easily falls into a local optimum during the learning and training process due to random initialization of the DBN network bias and weights, thereby affecting the computational efficiency. To address the problem, a fault diagnosis method based on a deep belief network optimized by genetic algorithm (GA-DBN) is proposed. The method uses the restricted Boltzmann machine reconstruction error to structure the fitness function, and uses the genetic algorithm to optimize the network bias and weight, thus improving the network accuracy and convergence speed. In the experiment, the performance of the model is analyzed from the aspects of reconstruction error, classification accuracy, and time-consuming size. The results are compared with those of back propagation optimized by the genetic algorithm, support vector machines, and DBN. It shows that the proposed method improves the generalization ability of traditional DBN, and has higher recognition accuracy of photovoltaic array faults.
Implementation of 1.7 kV Silicon Carbide Metal Oxide Semiconductor Field Effect Transistors in Auxiliary Power Supplies for Industrial Applications

An auxiliary power supply (Aux-PS) has become an essential component of electronic equipment for many industrial applications, such as in motor drives, photovoltaic (PV) inverters, uninterruptible power supply (UPS) systems and modular multilevel converters. The introduction of 1 700 V silicon carbide (SiC) metal oxide semiconductor field effect transistors (MOSFETs) is useful for such applications, providing benefits with respect to a low on-state resistance, smaller package, low switching loss and single-switching implementation. A single end flyback Aux-PS is designed for industrial applications with a wide input voltage range using 1.7 kV SiC MOSFETs. The special design tradeoffs involved in the usage of SiC MOSFETs are discussed in detail, such as those with regard to gate driving voltage selection, isolation transformer design considerations, and clamping circuit design details. A 60 W demonstration hardware is developed and tested under different working conditions. The results verify the higher efficiency and better thermal performance of the proposed hardware relative to those of traditional Si solutions.
Ant Lion Algorithm for Optimized Controller Gains for Power Quality Enrichment of Off-grid Wind Power Harnessing Units

The proposed system uses an algorithm that works on the admittance of the system, for estimating the reference values of generated currents for an off-grid wind power harnessing unit (WPHU). The controller controls the voltage and maintains the frequency within the limits while working with both linear and nonlinear loads for varying wind speeds. The admittance algorithm is simple and easy to implement and works very efficiently to generate the triggering signals for the controller of the WPHU. The wind power harnessing unit comprising of a squirrel cage induction generator, a star-delta transformer, a battery storage system and the control unit are modeled using Matlab/Simulink R2019. An isolated transformer with a star-delta configuration connects the load and the generator circuit with the controller to reduce the dc bus voltage and mitigate current in the neutral line. The response of the system during the dynamic loading depends on the best possible compensator proportional-integral (PI) gains. The antlion optimization algorithm is compared with particle swarm optimization and grey wolf optimization and is found to have the advantages of good convergence, high efficiency and fast calculating speed. It is therefore used to extract the optimal values of frequency and voltage PI gains. The simulation results of the control algorithm for the WPHU are validated in a real-time environment in a dSpace1104 laboratory set up. This algorithm is proven to have a quick response, maintain the required frequency, suppress the current harmonics, regulate voltage, help in balancing the load and compensating for the neutral current.
Monitoring of SiC MOSFET Junction Temperature with On-state Voltage at High Currents

A junction temperature monitoring method has been presented based on the on-state voltage at high currents. With a simplified physical model, this method mapped the relationship between junction temperature and on-state voltage. The tough calibration and signal sensing issues are solved. Verified by body-diode voltage detecting method, the presented method shows a good performance and high accuracy, in the meantime, it would not change the modulation strategy and topology of the converter.
Evaluation of alum-based water treatment residuals used to adsorb reactive phosphorus

Excess reactive phosphorus(PO_4) in waterways can lead to eutrophication.A low-cost approach to reducing PO_4 levels in surface water was evaluated using the alum-based water treatment residual(Al-WTR) or Al-WTR augmented with powdered activated carbon(PAC-WTR).Batch adsorption-desorption and continuous flow column experiments were performed to assess the specific adsorption capacities under various concentration and flow conditions.Both Al-WTR and PAC-WTR exhibited the ability to adsorb PO_4.The overall,cumulative sorbed amount after a 28-d desorption step for Al-WTR was 33.93 mg/kg,significantly greater than the PAC-WTR value of 24.95 mg/kg(p <0.05).The continuous flow column experiments showed a theoretical PO_4 uptake of 9.00 mg/g for Al-WTR and 7.14 mg/g for PAC-WTR over 720 h.When surface water was used,the Al-WTR and PAC-WTR columns removed 67.4% and 62.1% of the PO_4,respectively.These results indicated that Al-WTR was more effective for in-field evaluation.
Twistronics in graphene-based van der Waals structures

The electronic properties of van der Waals (vdW)structures can be substantially modified by the moire superlattice potential, which strongly depends on the twist angle among the compounds.In twisted bilayer graphene (TBG), two lowenergy Van Hove singularities (VHSs)move closer with decreasing twist angles and finally become highly non-dispersive flat bands at the magic angle (~ 1.1°).When the Fermi level lies within the flat bands of the TBG near the magic angle,Coulomb interaction is supposed to exceed the kinetic energy of the electrons, which can drive the system into various strongly correlated phases.Moreover, the strongly correlated states of flat bands are also realized in other graphene-based vdW structures with an interlayer twist.In this article, we mainly review the recent scanning tunneling microscopy (STM)advances on the strongly correlated physics of the magic-angle TBG (MATBG)and the small-angle twisted multilayer graphene.Lastly we will give out a perspective of this field.
Energy storage performances regulated by BiMnO_3 proportion in limited solid solution films

Na_(0.5)Bi_(0.5)TiO_3-BiMnO_3 (NBT-BM)limited solid solution films were fabricated to investigate the lattice modification on the energy storage performances.The introduction of the BM solute lattice induces the NBT solvent lattices undergoing the transition from the pure phase, solid solution, solubility limit to precipitation.Correspondingly, the polarization states transfer from the macroscopic ferroelectric domains to nanodomains then to compound ferroelectric domains.The introduction of BiMnO_3 generates great lattice changes including the local lattice fluctuation and the large lattice stretching, which enhance the energy storage performances, with the energy storage efficiency being enhanced from 39.2% to 53.2% and 51.7% and the energy density being enhanced from 33.1 J/cm~3 to 76.5 J/cm~3 and 83.8 J/cm~3 for the BM components of 2% and 4%, respectively.The lattice modifications play a key role in the energy storage performances for limited solid solution films, which provides an alternative strategy for energy storage material.
Nonadiabatic molecular dynamics simulation of C_2H_2~(2+) in a strong laser field

We investigate the alignment dependence of the strong laser dissociation dynamics of molecule C_2H_2~(2+) in the frame of real-time and real-space time-dependent density function theory coupled with nonadiabatic quantum molecular dynamics (TDDFT-MD)simulation.This work is based on a recent experiment study "ultrafast electron diffraction imaging of bond breaking in di-ionized acetylene" [Wolter et al, Science 354, 308-312 (2016)].Our simulations are in excellent agreement with the experimental data and the analysis confirms that the alignment dependence of the proton dissociation dynamics comes from the electron response of the driving laser pulse.Our results validate the ability of the TDDFT-MD method to reveal the underlying mechanism of experimentally observed and control molecular dissociation dynamics.
Silk:a versatile biomaterial for advanced optics and photonics [Invited]

The growing demand of sustainable and biocompatible optical devices is stimulating the development of naturally derived biomaterials for optics and photonics.As a versatile biomaterial,silk provides excellent material characteristics that are favorable towards the generation of advanced optical systems.This review examines the use of silk as a material platform in optical applications.Recent advances in silk-based optical devices and multifunctional devices are summarized.The challenges and directions in further designing and fabricating silk optics are also discussed.We envision that silk will play a pivotal role in the future exploitation of sustainable,intelligent,wearable/implantable,and multifunctional optical devices.
Diskcyclicity of Sets of Operators and Applications

In this paper, we introduce and study the diskcyclicity and disk transitivity of a set of operators. We establish a diskcyclicity criterion and give the relationship between this criterion and the diskcyclicity. As applications, we study the diskcyclicty of C0-semigroups and C-regularized groups. We show that a diskcyclic C0-semigroup exists on a complex topological vector space X if and only if dim(X) = 1 or dim(X) = ∞ and we prove that diskcyclicity and disk transitivity of C0-semigroups (resp C-regularized groups) are equivalent.
基于机器识别的电气接线自动检测技术研究

针对电气柜批量生产中接线查错工序效率低等问题,提出了一种基于机器识别技术的电气接线自动检测方法。改进了Canny算法,图像获取后采用自适应平滑滤波与形态学闭运算相结合的方法滤波去噪,采用最大类间方差法自适应选取阈值,重塑图像模型,提高边缘提取精度,准确测定接线端导线位置和线号。与对应接线库中数据作比对,判断接线是否正确。实验结果表明,该方法能够满足生产过程中电气接线检测的要求,有效提高电气柜生产线的生产质量和效率。
反复合并胆管结石的ANK1基因突变遗传性球形红细胞增多症一例

遗传性球形红细胞增多症(hereditary spherocytosis,HS)是一种红细胞膜缺陷导致红细胞破坏增多的家族遗传性溶血疾病。其临床表现可有溶血性贫血、黄疸、脾大等,由于HS症状常不典型,临床表现具有异质性,易误诊漏诊。HS长期溶血容易导致胆管结石或胆囊结石,部分患者以"胆石症"为主要症状就诊。本文报道一例因反复发作胆管结石合并黄疸而被长期漏诊ANK1基因突变所致的HS患者。
甲状腺术后发声障碍现状及研究进展

随着人们生活方式和环境的改变、健康意识增强以及检查技术的优化,甲状腺疾病发病率及检出率明显升高。甲状腺切除术是治疗甲状腺占位病变最直接、有效的方法,但同时也可能出现一些术后并发症,如吞咽呛咳、发声障碍等。临床上甲状腺术后发声障碍常表现为声音嘶哑、发声易疲劳、声音微弱、音调低沉、发高音困难等。研究表明若在术后3个月内进行干预,可显著改善患者主观及客观嗓音症状,故围手术期预防、术前风险预测及术后早期诊断显得尤为重要。本文对甲状腺术后发声障碍的病因及诊疗进展进行综述,旨在为甲状腺术后发声障碍的有效预防及诊治措施提供参考。
频率特异性ABR临床应用的研究进展

听阈测试的目的是获得在人类言语频率范围内每耳各频率的听阈。测试时应考虑的影响因素有受试者因素(年龄、健康情况)、刺激因素(频率、速率、强度)、记录因素(最佳滤波及电极位置)。而对于低龄婴幼儿,由于其无法配合主观听阈测试,目前主要是采用电生理测试方法来估算听阈。
Turner综合征合并中耳胆脂瘤一例及文献复习

目的探讨Turner综合征(turner syndrome,TS)即先天性卵巢发育不全综合征并中耳胆脂瘤的临床诊治特点。方法对1例合并中耳胆脂瘤的TS患儿(女性,13岁)的临床资料及诊治过程进行总结,并复习相关文献。结果本例患儿身材矮小,双侧耳廓招风耳畸形,右侧耳道内大量肉芽样物及脓、血性分泌物,鼓膜未能窥及;右耳传导性聋(0.25~8kHz气导阈值:70、75、75、70、60、50dB HL,0.25~4kHz骨导阈值:0、0、5、5、5dB HL);颞骨CT显示脑膜低位,乳突气化不良,右侧耳道、中耳、乳突内软组织密度影,周围骨质破坏明显,听小骨骨质密度减低。于全身麻醉下行右侧乳突根治及鼓室成形术,术后病理检查显示胆脂瘤继发慢性化脓性炎症,异物肉芽肿形成。诊断为右侧中耳胆脂瘤,Turner综合征,核型45,X,O/46,X,X(99%/1%);术后复查纯音听阈,气导听阈:35、40、40、40、30、20dB HL听阈,骨导听阈:20、20、20、25、25dB HL,随访半年无感染及复发。结论中耳胆脂瘤在TS中具有较高的患病率及强侵袭性,应当及早关注、早期诊断、及时手术治疗和仔细随访,以尽量减少胆脂瘤进展的风险。
“健康中国”背景下慢性病防治的体医融合服务模式探索

为应对日益加剧的老龄化和居高不下的慢性病高发态势,《“健康中国2030”规划纲要》指出,发挥全民科学健身在健康促进、慢性病预防和康复等方面的积极作用,推动形成体医结合的疾病管理与健康服务模式。自体医融合提出以来,国内学者围绕体医融合的内涵路径、制约因素和体制机制等进行了一些研究,但多是宏观层面的探讨,缺乏对目前我国体医融合服务模式的总结和分析。本研究探寻了我国各地慢性病防治的体医融合实践,总结了典型的体医融合服务模式,比较了各服务模式的优缺点,并分析了影响体医融合的制约因素和突出矛盾,为体医融合从宏观政策到微观操作的进一步发展提供经验借鉴。
Impedance control of multi-arm space robot for the capture of non-cooperative targets

Robotic systems are expected to play an increasingly important role in future space activities.The robotic on-orbital service,whose key is the capturing technology,becomes a research hot spot in recent years.This paper studies the dynamics modeling and impedance control of a multi-arm free-flying space robotic system capturing a non-cooperative target.Firstly,a control-oriented dynamics model is essential in control algorithm design and code realization.Unlike a numerical algorithm,an analytical approach is suggested.Using a general and a quasi-coordinate Lagrangian formulation,the kinematics and dynamics equations are derived.Then,an impedance control algorithm is developed which allows coordinated control of the multiple manipulators to capture a target.Through enforcing a reference impedance,end-effectors behave like a mass-damper-spring system fixed in inertial space in reaction to any contact force between the capture hands and the target.Meanwhile,the position and the attitude of the base are maintained stably by using gas jet thrusters to work against the manipulators'reaction.Finally,a simulation by using a space robot with two manipulators and a free-floating non-cooperative target is illustrated to verify the effectiveness of the proposed method.
《妊娠和产后甲状腺疾病诊治指南(第2版) 》解读

妊娠期甲状腺疾病一直是近年来内分泌学界和围产医学界的热点领域之一,其对母体及胎儿神经系统和智力发育的影响也受到广泛的关注。2017年,美国甲状腺学会(American Thyroid Association,ATA)颁布《妊娠期和产后甲状腺疾病诊断和管理指南》。在此基础上,我国中华医学会内分泌学分会、中华围产医学分会和国家卫生健康委员会结合国内外诸多新的研究证据,颁布了2019年《妊娠和产后甲状腺疾病诊治指南(第2版) 》。现结合国内外最新研究解读该指南中的重点内容。
A downshifting Eu~(3+) doped glass embedded with concave pyramid microstructure to improve the efficiency of silicon solar cell

The average photoelectric conversion efficiency (PCE)of a bare mono crystalline silicon solar cell is 14.71% ± 0.03% under AM1.5.It decreases to 14.20% ± 0.005% when covering an un-doped flat glass on the solar cell, and it goes down to 14.10% ± 0.005% by using a 5 wt% Eu~(3+) doped glass.The absorptions of the Eu~(3+) doped CPM glass one-to-one match the excitation spectra at 362, 381, 393, 400, 413 and 464 nm, which are related to the transitions of ~7F_0→(~5D_4, ~5G_2, ~5L_6, ~5D_3), ~7F_1→~5D_3, and ~7F_0→~5D_2,respectively.In addition, a concave pyramid microstructure (CPM)is embedded in the glass surface to increase light transmittance.The average PCE increases to 14.61% ± 0.07% when a 5 wt% Eu~(3+) doped CPM glass covers on the silicon solar cell.Compared with the un-doped flat glass, a net increase of the PCE is 0.41%, where the 0.16% increment of PCE is from the lighting trapping of the CPM structure, and the downshifting of near ultraviolet (NUV)light by Eu~(3+) ion donates the other 0.25% increment.It confirms that the as-prepared Eu~(3+) doped CPM glass has a good downshifting and antireflection function.