mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Performance Improvement of NCSs Under Complex Network via Concurrent Paths

Different from the single paths between controllers and plants of networked control systems (NCSs), the complex network provides widespread links and brings plenty of paths from the controller side to the plant side. Benefit from this advantage, a novel data transmission dispatching strategy is proposed. When the direct path can not satisfy the condition of system demand, neither stability nor performance, some specified paths compose a concurrent-path to transmit the control signal concurrently. Firstly, the networked control systems (NCSs) are expressed by the switched systems model with the constant network-induced delay, and the network communication is described as a packet-loss process. Secondly, taking system's exponential decay rate as its performance indicator, the relationship between control signal transmission paths and system performance is quantitatively given by considering packet losses as the compound poisson process and the alternating renewal process. Then, due to that different combination of paths induces the different statistical properties of packet losses, the approach to find an appropriate concurrent-path is proposed concerning two mutually constrained factors, the system performance demand and the utilization of network resources. After the theoretical analysis, a distributed communication platform based on peer-to-peer (P2P) network technology is designed and implemented to realize the concurrent-path transmission on internet. Finally, the practical experiment on the platform demonstrates the validity and effectiveness of proposed approach.
基于AdvantEdge FEM的Ti6242钛合金切削力仿真与试验研究

研究切削用量对车削Ti6242钛合金的切削力的影响。首先进行Ti6242钛合金的车削仿真,然后建立车削Ti6242钛合金主切削力的二次响应面回归数学模型并进行试验验证。结果表明,车削Ti6242钛合金的主切削力随着切削速度的增加缓慢降低,随着进给量和切削深度的增加显著上升。
高功率因数的无刷直流电机驱动器设计

针对传统的无刷直流电机电源设备的功率因数低、电流纹波大等问题,设计了一种新型无桥Cuk变换器BLDCM驱动器进行电路的功率因数校正,提高电源设备的电能质量,降低输入传导损耗,实现对无刷直流电机转速的有效控制。以不连续电感电流模式(DICM)为例,使用单周期控制策略来分析了驱动器的工作原理及其各参数设计,在MATLAB仿真建立了相应的仿真模型。仿真结果表明,无桥Cuk变换器BLDCM驱动器能够很好地提高电源设备的功率因数,抑制电流谐波,无刷直流电机稳定良好运行。
基于多场耦合的电机复杂工况暂态温度场研究

针对负载变化的复杂工况下电机暂态温度场的计算问题,以小型封闭式结构的异步电机为对象,采用多场耦合的方法建立二维多场耦合模型,通过电磁场、温度场模型等效参数的合理设置和电磁场-温度场耦合参数的合理设置,计算复杂工况下电机二维全域暂态温度场。结合各种复杂工况下负载变化的热积累特点,以及电机全域及定子、绕组、转子和外壳等典型部位的温升变化,分析各种复杂工况下电机温升变化规律。通过搭建实验平台测试全域暂态温度场,分析对比实验数据与仿真数据,证明通过合理设置模型等效参数和耦合参数,多场耦合方法能准确的计算复杂发热状况下的电机暂态温度场、温升分布及变化规律。
采煤机振动特性研究

为研究采煤机截割复杂煤层时的振动特性,利用多软件协同仿真平台建立采煤机整机多体模型,基于破煤理论结合煤样性质测试结果对采煤机前后滚筒受到的外部载荷进行计算,通过施加载荷边界条件对模型进行动力学和振动特性仿真,得到了前后摇臂壳体的受力分布及不同测试点的加速度响应,其中前滚筒的振动明显大于后滚筒;滚筒垂直方向上的振动最为剧烈。利用子结构模态综合法判断出应力以及测试点加速度与模态振动的相关性,其中第3阶模态中摇臂的弯曲和扭转变形会造成采煤机振动加剧及受力增大。研究结果为采煤机的结构改进、后续测试提供了重要的参考。
从中医小肠腑理论谈小肠在肠易激综合征发病中的作用

肠易激综合征是以腹痛、大便异常为主症的临床常见病,是中医治疗的优势病种。中医学小肠腑在临床上也多见有腹泻、便秘、腹痛等症状群。小肠细菌过度生长、小肠动力异常等也是肠易激综合征的病理机制。文章拟以中医小肠腑功能异常在肠道方面的体现,结合肠易激综合征中的小肠病理,以及中医药调理小肠治疗肠易激综合征等来探讨小肠在肠易激综合征发病中的作用。
消化内镜人工智能:风起与笃行

近年来伴随着数据量的飞跃、运算力的提升和机器学习新算法(深度学习)的出现,人工智能开发应用的热潮再次兴起。作为人工智能医疗应用的热点领域,消化内镜人工智能的研究越来越受到内镜医生的关注,并在国内外多个中心开展。目前消化内镜人工智能研究领域包括胃肠镜、胶囊内镜、共聚焦显微内镜等各种类型,以及包括息肉、炎症、早期癌症等多种疾病。消化内镜人工智能能在病变检出、疾病分类、内镜质量控制等多个方面为消化内镜医生提供帮助,是未来消化内镜发展的必然趋势,但如何让消化内镜人工智能真正进入临床,实现实用化、产业化是目前需要谨慎思考的问题。本文我们将讨论消化内镜人工智能目前的研究现状以及未来发展的一些思考。
楼兰出土文书所见“北斗主创”相关再考---兼论北斗信仰在古代医学中的应用

楼兰出土文书Or.8212/485载有“北斗主创”一语,考证其源自中国古代“北斗主杀”的观念。北斗在古代医学中还被赋予延寿、起死回生、聚气驱邪、为祟等作用,并与肾的功能密切相关。故对北斗在古代医学中的应用进行梳理,对于帮助理解古人之病因及治疗观念具有重要意义。
Design and Fabrication of a Bio-inspired Acceleration Sensor Using Liquid Mass Blocks

A linear acceleration sensor,which is inspired by the human balance organ,is designed and prepared. It uses a liquid mass-block and a symmetrical-electrodes metal-core polyvinylidene fluoride fiber(SMPF)as the sensor element. The output signal of the sensor has an exponential relationship with the excitation amplitude of the impacting vibration. It is capable of detecting the amplitude and the correct frequency for sinusoidal excitations using an exponential correlation. The experiments indicate that both the output signal of the sensor and the resonance frequency increase substantially with increasing diameter of the metal core. The first-order resonance frequencies of the sensors with 40,60,and 80 μm diameter metal wires are below 10 Hz,which is near the range of human body motion frequencies.
Modeling of thermal conductivity and density of alumina/silica in water hybrid nanocolloid by the application of Artificial Neural Networks

In this research work, the thermal conductivity and density of alumina/silica(Al_2O_3/SiO_2) in water hybrid nanofluids at different temperatures and volume concentrations have beenmodeled using the artificial neural networks(ANN). The nanocolloid involved in the study was synthesized by the two-step method and characterized by XRD, TEM, SEM–EDX and zeta potential analysis. The properties of the synthesized nanofluid were measured at various volume concentrations(0.05%, 0.1% and 0.2%) and temperatures(20 to 60 ℃). Established on the observational data and ANN, the optimum neural structure was suggested for predicting the thermal conductivity and density of the hybrid nanofluid as a function of temperature and solid volume concentrations. The results indicate that a neural network with 2 hidden layers and 10 neurons have the lowest error and a highest fitting coefficient of thermal conductivity, whereas in the case of density, the structure with 1 hidden layer consisting of 4 neurons proved to be the optimal structure.
Nucleation of methane hydrate and ice in emulsions ofwater in crude oils and decane under non-isothermal conditions

Achievable supercooling for the formation ofmethane hydrate fromwateremulsionswas studied in seven different crude oils and in decane. The experiments were performed under constant rate cooling from+20 to–15 ℃ and a pressure of methane of 12MPa. Itwas demonstrated that the shapes and positions of the resulting survival curves depend on the density, viscosity and dispersive power of oil samples used in the experiments, aswell as on the degree of oil oxidation. In addition, results of the experiments on ice freezing under the same emulsions are presented. The results obtained in the work allowed us to discuss the possibility and features of primary and secondary nucleation of the hydrate and ice in the systems under consideration.
Nitrogen-doped hierarchical porous carbon from polyaniline/silica self-aggregates for supercapacitor

In this paper, nitrogen-doped hierarchical porous carbon(N-HPC) was prepared from polyaniline(PANI)/silica self-aggregates. H-bonding between N\\H groups in aniline/PANI and\\OH groups in nano silica template led to a self-assembly type, which enabled the formation of uniform N-HPC nanoparticles. Silica self-aggregates provided macroporous channels resulted in a decreased diffusion distance. After removing the hard template, the N-HPC had a high surface area(899 m~2·g~(-1)). Owing to two co-existed synergetic energy-storage mechanisms and the hierarchical porous structure, the obtained N-HPC exhibited a high specific capacitance of 218.75 F·g~(-1) at 0.5 A·g~(-1), compared with the nonporous nitrogen-doped carbon(N-C) derived from pure PANI. Moreover, the N-HPC electrode demonstrated excellent cycle life, retaining 99% of its initial specific capacitance after 1000 cycles.
Conditioning of a Calcaric Soil with Biosolid and Compost Under Laboratory Conditions: Exploration of Soil Property Evolution

Conditioning of soils of low organic carbon (OC) is essential to establish optimal fertility conditions for the growth and development of future crops. A usual practice is the substrates of various origins, among which cheap wastes from agricultural or urban residues with high organic matter (OM) content have been gaining popularity in the last decades. An increase in soil OM is considered a desirable trait in agriculture because of its benefits; apart from the increase in soil OC content and the regulation of soil pH, it improves soil and plant macro- and micronutrient contents and hence crop yields, provides greater aggregate stability, reduces soil density, improves water retention, and enhances soil porosity, favoring rhizosphere aeration and resulting in a general enhancement of soil biological activity (Bastida et al., 2007; Herencia et al., 2011; Kepka et al., 2016, 2017). In many countries of the Mediterranean basin, application of amendments as soil management is essential to cope with desertification or soil erosion, which leads to huge soil losses.
Kinetics of Ligand-Controlled Release of Zinc in Acid Sulfate Paddy Soils

The elevated solubility of zinc (Zn) in acid sulfate paddy soils can limit rice production and pose a risk of environmental pollution. However, little attention has been paid to the ligand-controlled release of Zn in these soils. Here we quantified the rate of ligandcontrolled Zn release in Thai acid sulfate paddy soils, using ethylenediaminetetraacetic acid as the extractant. Sequential extractions were performed to obtain quantitative information on Zn fractions contributing to the ligand-controlled mechanisms. The amount of Zn released within 192 h varied significantly (8–43 mg kg~(-1)), which corresponded to 12%–40% of the total soil Zn, indicating that Zn solubility in most soils was relatively low and that Zn mainly occurred as residual phases. The kinetics of Zn release was well described by the power function model (r = 0:65–0.99, median = 0.87). The magnitude of initial Zn release (coefficient a) was significantly (P < 0:05) related to the aqua regia-soluble Zn. Easily mobile Zn, organically bound Zn, and Zn associated with Fe and Mn oxides also contributed to the ligand-controlled release mechanisms to various degrees. Our results provide a systematic understanding of Zn fractions and release from acid sulfate paddy soils, the dynamics of which have a significant influence on the availability, phytoextraction, and mobility of Zn in terrestrial and engineered environments.
Vertical Distribution of Soil Pyrogenic Matter: A Review

Alteration of terrestrial biomass during fire produces pyrogenic matter, a large quantity of which is deposited on and may enter soils. The amount of annual burning around the globe implies greater production and storage of carbon in soil pyrogenic organic matter (pyrOM) than is regularly found in investigations of soil pyrogenic matter. A portion of this unaccounted for pyrogenic material may be translocated to subsurface soil depths, which is frequently excluded from soil investigations, and the presence of subsoil charcoal helps to partially fill this pyrOM gap. In this paper, I discuss the mechanisms for vertical redistribution of pyrogenic matter in soils and develop conceptual models to describe the depth, particle size, and age distribution of pyrogenic matter resulting from different translocation mechanisms. Based on the relationships between pyrogenic matter turnover and translocation, the suitability of pyrogenic matter in soils as an indicator for soil processes is discussed. Deciphering the relationships between pyrogenic matter depth, particle size, and age distribution yields valuable insights into the dynamics of soil forming processes as well as soil pyrogenic matter turnover, which should therefore, be a focus of future studies.
Study of spatial resolution of the associated alpha particle imaging–time-of-flight method

Associated alpha particle imaging based on the time-of-flight (API-TOF) technique is an advanced neutron analysis method, which is capable of discriminating material nuclides and three-dimensional imaging of the spatial distribution of material nuclei. In this paper, the spatial resolution of API-TOF and its effects are studied using mathematical analysis and Monte Carlo numerical simulation. The results can provide guidance and assist in designing of API-TOF detection devices. First, a mathematical analysis of the imaging principles of the API-TOF was carried out, and the calculation formulas of the spatial resolution of API-TOF were deduced. Next, the relationship between the device layout and the spatial resolution of the API-TOF detection device was studied. The concept of a typical API-TOF detection device with an optimized structure was proposed. Then, the spatial distribution of the spatial resolution of the typical API-TOF detection device was analyzed, and the effects of the time resolution and the neutron emission angle resolution on the spatial resolution were studied. The results show that spatial resolutions better than 1 cm can be achieved by improving the time resolution and the neutron emission angle resolution to appropriate levels. Finally, a Monte Carlo numerical simulation program was developed for the study of the APITOF and was used to calculate the spatial resolutions of the API-TOF. The comparison of the results shows that the spatial resolutions calculated based on the Monte Carlo numerical simulation are in good agreement with those calculated based on the mathematical analysis. This verifies the mathematical analysis and the evaluation of the effects of the spatial resolution of the API-TOF in this study.
Slice-wise reconstruction for low-dose cone-beam CT using a deep residual convolutional neural network

Because of the growing concern over the radiation dose delivered to patients, X-ray cone-beam CT (CBCT) imaging of low dose is of great interest. It is difficult for traditional reconstruction methods such as Feldkamp to reduce noise and keep resolution at low doses. A typical method to solve this problem is using optimizationbased methods with careful modeling of physics and additional constraints. However, it is computationally expensive and very time-consuming to reach an optimal solution. Recently, some pioneering work applying deep neural networks had some success in characterizing and removing artifacts from a low-dose data set. In this study, we incorporate imaging physics for a cone-beam CT into a residual convolutional neural network and propose a new end-to-end deep learning-based method for slice-wise reconstruction. By transferring 3D projection to a 2D problem with a noise reduction property, we can not only obtain reconstructions of high image quality, but also lower the computational complexity. The proposed network is composed of three serially connected sub-networks: a cone-to-fan transformation sub-network, a 2D analytical inversion sub-network, and an image refinement sub-network. This provides a comprehensive solution for end-toend reconstruction for CBCT. The advantages of our method are that the network can simplify a 3D reconstruction problem to a 2D slice-wise reconstruction problem and can complete reconstruction in an end-to-end manner with the system matrix integrated into the network design. Furthermore, reconstruction can be less computationally expensive and easily parallelizable compared with iterative reconstruction methods.
数字化弹性触诊仪用于健康人竖脊肌硬度评估的研究

腰痛是近年来研究热点之一,流行病学报告显示青年人群发病率为42.4%[1]。重体力劳动、频繁扭转/屈曲躯干、站立运动为LBP的好发人群。对于腰痛的研究多集中在竖脊肌(胸最长肌、腰髂肋肌)、多裂肌及腰方肌等肌肉硬度上[2]。肌肉的硬度(肌肉机械特性之一)被认为是肌肉功能的基础,并保证肌肉能够有效的收缩。有研究表明,肌肉功能紊乱是潜在腰痛产生疼痛的重要原因[3]。然而,目前量化肌肉硬度的方法包括磁共振弹性成像(magnetic resonance elastography, MRE)、超声弹性成像(ultrasound elastography, US),以及数字化弹性触诊仪MyotonPRO。但在临床中MRE由于操作耗时、代价大,难以在临床推广应用。近年来对Myoton- PRO的研究逐年增加[4—5],但量化竖脊肌硬度信度尚未见报道。因此,本研究旨在运用MyotonPRO量化评估日常生活中端坐位、站立位及俯卧位3种常见体位对竖脊肌硬度的影响,并对MyotonPRO测量竖脊肌肌肉硬度进行信度研究。
Magma Replenishment as Revealed by Textural and Geochemical Features of Plagioclase Phenocrysts in Subduction-Related Lavas

Various petrographic features and geochemical characteristics indicative of disequilibrium are preserved in plagioclase phenocrysts from basaltic to andesitic lavas in East Junggar, northwest China. These characteristics indicate that they crystallized in a magma chamber, which was replenished by less differentiated and high-temperature magmas. The petrographic and geochemical features of the plagioclase phenocrysts are interpreted to record responses to changes in temperature, composition and mechanical effect during magma replenishment. Distinct rare earth element (REE) patterns between cores and rims of the same plagioclase crystal suggest derivation from two end-member magmas. From core to rim, plagioclase phenocrysts commonly display sharp fluctuations of anorthite (An) content up to 20,which either correspond to reverse zoning associated with ovoidal cores and resorption surface (PI), or normal zoning with euhedral form and no resorption surface (P2). Plagioclase crystals with diverse textures and remarkably different An content coexist on the scale of a thin-section. Cores of these plagioclases in each sample display a bimodal distribution of An content. From core to rim in PI, concentrations of FeO1 and Sr increase remarkably as An content increases. During magma replenishment, pre-existing plagioclase phenocrysts in the andesitic magma, which were immersed into hotter and less differentiated magmas, were heated and resorbed to form ovoidal cores, and then were overgrown by a thin rim with much higher contents of An, FeOT and Sr. However, pre-existing plagioclase phenocrysts in the basaltic magma were injected into cooler and more evolved magmas, and were remained as euhedral cores, which were later enclosed by oscillatory zoned rims with much lower contents of An, Sr and Ba.
Broken hearts: Iron overload, ferroptosis and cardiomyopathy

In a recently published paper in Proc Natl Acad Sci USA, Fang et al. elegantly demonstrated that doxorubicin treatment or transient ischemia/reperfusion in mice triggers ferroptosis, a distinctive form of necrotic cell death marked by irondependent lipid peroxidation, which is the main underlying mechanism in the pathogenesis of cardiomyopathy.
双极雄激素疗法治疗去势抵抗性前列腺癌的研究进展

双极雄激素疗法(BAT)作为一种新型的方法治疗去势抵抗性前列腺癌,目前已取得一定的临床效果,可降低患者血清前列腺特异性抗原水平,抑制肿瘤生长,增加药物治疗敏感性,安全、有效,本文对BAT的临床试验、机制、生物标志物、发展前景作一综述。
Emergency Response for a Laboratory Biosafety Incident

On December 14,2017,a faculty member of a university in Hunan Province reported that an anthrax vaccine strain might have recovered virulence during an undergraduate experiment and potential exposure could not be ruled out for the students involved.Upon receiving the case report,the CDC,health bureaus,and local governments at the county,prefectural,and provincial levels promptly organized experts in different fields (including epidemiologists,biosafety experts,and laboratory testing experts) for case investigation,evaluation,and response.As the investigation results showed,no virulence recovery was identified in the involved anthrax vaccine strain;and no contamination of Bacillus anthracis was detected at the involved areas.Thus,the university returned to normal functioning.
Establishment of Numerical Wave Flume Based on the Second-Order Wave-Maker Theory

With growing computational power,the first-order wave-maker theory has become well established and is widely used for numerical wave flumes.However,existing numerical models based on the first-order wave-maker theory lose accuracy as nonlinear effects become prominent.Because spurious harmonic waves and primary waves have different propagation velocities,waves simulated by using the first-order wave-maker theory have an unstable wave profile.In this paper,a numerical wave flume with a piston-type wave-maker based on the second-order wave-maker theory has been established.Dynamic mesh technique was developed.The boundary treatment for irregular wave simulation was specially dealt with.Comparisons of the free-surface elevations using the first-order and second-order wave-maker theory prove that second-order wave-maker theory can generate stable wave profiles in both the spatial and time domains.Harmonic analysis and spectral analysis were used to prove the superiority of the second-order wave-maker theory from other two aspects.To simulate irregular waves,the numerical flume was improved to solve the problem of the water depth variation due to low-frequency motion of the wave board.In summary,the new numerical flume using the second-order wave-maker theory can guarantee the accuracy of waves by adding an extra motion of the wave board.The boundary treatment method can provide a reference for the improvement of nonlinear numerical flume.
MIMO Underwater Acoustic Communication in Shallow Water with Ice Cover

Although multiple-input multiple-output (MIMO) underwater acoustic (UWA) communication has been intensively investigated in the past years,existing works mainly focus on open-water environment.There is no work reporting MIMO acoustic communication in under-ice environment.This paper presents results from a recent MIMO acoustic communication experiment which was conducted in Bohai Gulf during winter.In this experiment,high frequency MIMO signals centered at 10 kHz were transmitted from a two-element source array to a four-element vertical receiving array at 1 km range.According to the received signal of different array elements,MIMO acoustic communication in under-ice environment suffers less effect from co-channel interference compared with that in open-water environment.In this paper,time reversal followed by a single channel decision feedback equalizer is used to process the experimental data.It is demonstrated that this simple receiver is capable of realizing robust performance using fewer hydrophones (i.e.2) without the explicit use of complex co-channel interference cancelation algorithms,such as parallel interference cancelation or serial interference cancelation.
Different meridian tropism in three Chinese medicines: Tinglizi (Semen Lepidii Apetali), Yiyiren (Semen Coicis), Cheqianzi (Semen Plantaginis)

OBJECTIVE: To study the meridian tropism (MT) for three Chinese medicines: Tinglizi (Semen Lepidii Apetali, TLZ), Yiyiren (Semen Coicis, YYR), Cheqianzi (Semen Plantaginis, CQZ) in vivo experiments. METHODS: The extracts of TLZ, YYR, CQZ were orally administered to rats at a dose 234, 700 and 350 mg/ kg, respectively. The urinary excretion rate, loss in weight of rats and the electrolyte levels in the plasma were measured, in order to assess the mechanisms of the three traditional Chinese diuretic medicines. RESULTS: TLZ, YYR and CQZ exhibited obvious diuretic effect and reduced the weight of saline-loaded animals. All the three diuretic medicines differentially reduced various serum, urinary, lung, stomach, kidney and hormonal markers, thus indicating the different mechanisms of action and a close resemblance with their different meridian as per the MT theory. CONCLUSION: Our findings suggest that the three Traditional Chinese Medicine (TCM) medicines-TLZ, YYR and CQZ- possess different Shamisen meridian. This can support the regimen of treating the same disease with different therapies in TCM theory.