Identifying influential spreaders in complex networks based on density entropy and community structure

In recent years,exploring the relationship between community structure and node centrality in complex networks has gained significant attention from researchers,given its fundamental theoretical significance and practical implications.To address the impact of network communities on target nodes and effectively identify highly influential nodes with strong propagation capabilities,this paper proposes a novel influential spreaders identification algorithm based on density entropy and community structure(DECS).The proposed method initially integrates a community detection algorithm to obtain the community partition results of the networks.It then comprehensively considers the internal and external density entropies and degree centrality of the target node to evaluate its influence.Experimental validation is conducted on eight networks of varying sizes through susceptible–infected–recovered(SIR)propagation experiments and network static attack experiments.The experimental results demonstrate that the proposed method outperforms five other node centrality methods under the same comparative conditions,particularly in terms of information spreading capability,thereby enhancing the accurate identification of critical nodes in networks.

不同陈酿期的清香型小曲酒品质对比研究

对清香型小曲酒的新酒及陈酿一至五年(共六个层级)的原酒品质进行了技术鉴定和消费者调查研究。结果表明,清香型小曲酒陈酿1年已具备小曲清香典型风格,陈酿2年已开始出现陈香,陈酿3年陈香已较明显,随着陈酿时间的增加,感官评分呈递增态势,说明小曲清香型原酒陈酿3年后质量有明显的提升。

现代工艺浓香型白酒蒸馏过程中不同馏分风味物质的变化特性

为探究现代工艺酿造的浓香型白酒不同馏分中各风味组分以及对应酒精度的馏出特性和相关性,以机械化酿造的34个不同馏分的浓香型原酒为研究对象,采用液液萃取-气相色谱-质谱联用(liquid-liquid-extraction gas chromatography-mass,LLE-GC-MS)对样品风味物质进行定性定量分析,结合感官品评分析结果,进行了层次聚类热图分析,Pearson相关性分析以及正交偏最小二乘判别分析(orthogonal projections to latent structures-discriminant analysis,OPLS-DA),建立了不同馏分酒精度变化的数学模型:C t=73.373-0.012e 0.007t,其中决定系数以及均方根误差均为0.997,表示模型拟合的效果非常好。通过总结馏出规律,可以很好地把34个馏分分为4个大类,其中馏分0~2为酒头,馏分3~12为头段酒,馏分13~26为中段酒,馏分27~33为酒尾。16种主要风味物质按照相关性分成了A、B两个大类,且2个类别之间存在着显著的负相关,A类物质随着馏分的馏出,含量逐渐降低,B类物质的趋势则完全相反。感官评定结果显示,头段酒的综合评价最好,酯香浓郁,窖香突出,糟味明显,口感谐调,而没有明显的尾味。该研究分别基于风味物质和酒精度建立了不同时间段馏分的分类模型,为浓香型白酒现代工艺的量质摘酒、分段摘酒提供了参考依据。

不同产地陶缸陈酿酱香型白酒的动物醉酒度研究

目的:对不同产地陶缸贮存的酱香型白酒的动物醉酒度进行对比研究,分析陶缸产地对酱香型白酒醉酒度是否存在影响。方法:以54%vol酒精为空白对照,对BALB/c小鼠使用不同产地陶缸贮存后的酱香型白酒进行灌胃,分别观察给药后4.5 h~5.0 h内动物的醉酒情况。结论:不同产地陶缸所贮酱香型白酒在动物醉酒度各项指标上不存在明显差异,说明陶缸产地对酱香型白酒醉酒度不存在影响。

Multi-Objective Optimization Analysis of Auxiliary Flux Modulator Magnetic Gear with Unequal Magnetic Poles

To enhance the output torque and minimize the torque ripple of coaxial magnetic gear(CMG),a novel auxiliary flux modulator CMG with unequal magnetic poles is proposed.This design incorporates an inner rotor with an asymmetric sector and a trapezoidal combined N-S pole structure,featuring Halbach arrays for the arrangement of permanent magnets(PMs).The outer rotor PMs adopt a Spoke-type configuration.To optimize the CMG for high output torque and low torque ripple,a sensitivity analysis is conducted to identify key size parameters that significantly influence the optimization objectives.Based on the sensitivity hierarchy of these parameters,a multi-objective optimization analysis is performed using a genetic algorithm(GA)to determine the optimal structural parameter values of the CMG.In addition,a coaxial magnetic gear(CMG)topology with 4 inner and 17 outer pole pairs is adopted,and the parametric model is established.Finally,the electromagnetic properties of the CMG are evaluated using the finite element method.The results indicate a remarkable reduction in torque ripple,specifically by 46.15%.

酒用分子筛介质净化白酒过程中金属元素的迁移研究

白酒生产中使用的分子筛介质是净化处理用的助剂,材质中含有一定量的金属元素。本研究对分子筛介质中的几种可能会严重影响白酒品质的金属元素As、Pb、Fe、Zn、Ca、Cu含量进行测定,以不同接触时间、不同介质使用比例进行白酒净化试验,研究分子筛介质在与白酒的接触过程中金属元素迁移到酒体中的情况,同时对比实际生产。试验结果表明,分子筛介质中Ca、Fe元素含量较高,在净化过程中Fe、Pb元素较为稳定,没有出现迁移现象,其他几种金属元素随着接触时间和介质量的增加而迁移量增加,但迁移量都在安全范围内,不会影响白酒的品质。

不同香型白酒在陶缸陈酿过程中的变化研究

为了弄清楚不同香型白酒在陶缸陈酿过程中的变化情况,更好地指导原酒的科学贮存,选取3种香型白酒(清香、浓香、酱香)分别放入陶缸中进行陈酿3年,研究3种香型白酒在陶缸陈酿过程中酒精度、金属元素、微量风味成分和感官风格的变化情况。随着储存时间的延长,酯类物质含量总体呈现下降趋势,三年左右趋于平衡,酸类物质缓慢增加,高级醇含量轻微下降;Na、K、Mg、Fe、Zn等金属元素显示出升高的趋势;感官评分呈一定的增加趋势。

毛铺荞酒中植物提取成分对醉酒度影响研究

为验证毛铺荞酒中植物提取成分对于醉酒度的影响,采取动物醉酒度实验对毛铺荞酒、对应的基酒进行了醉酒度评价。根据结果来看,融入植物提取成分的毛铺荞酒相比于普通基酒,其醉酒时间有显著延长趋势(p<0.05),且醒酒时间明显缩短(p<0.05),说明植物提取成分对于改善饮后舒适度有一定作用,为未来露酒发展提供参考依据。

赝电容型超级电容器电极材料研究进展

超级电容器作为一种新型环境友好型储能元件,具有传统电容器及化学电源无法比拟的优点,目前已在众多领域受到广泛关注。概述了基于法拉第反应储能原理的超级电容器电极材料包括金属氧化物材料及导电聚合物等材料的最新研究进展,在此基础上提出了纳米多元金属复合电极和以导电聚合物/纳米多孔碳为基底的柔性纳米复合电极为超级电容器电极材料的发展方向。

An Improved Approach to Delay-dependent Robust Stabilization for Uncertain Singular Time-delay Systems

In this paper, delay-dependent stability analysis and robust stabilization for uncertain singular time-delay systems are addressed. By using Jensen integral inequality, an improved delay-dependent criterion of admissibility for singular time-delay systems is proposed in terms of linear matrix inequality （LMI）. Our new proposed criterion is less conservative and the numerical complexity is smaller than the existing ones. Based on this criterion, a state feedback controller is designed to ensure that the uncertain singular time-delay system is admissible. Finally, three numerical examples are employed to illustrate the effectiveness of the proposed method.

Stability analysis and stabilization for discrete-time singular delay systems

Stability analysis and stabilization for discrete-time singular delay systems are addressed,respectively.Firstly,a sufficient condition for regularity,causality and stability for discrete-time singular delay systems is derived.Then,by applying the skill of matrix theory,the state feedback controller is designed to guarantee the closed-loop discrete-time singular delay systems to be regular,casual and stable.Finally,numerical examples are given to demonstrate the effectiveness of the proposed method.

不同产地陶缸对白酒陈酿过程的影响研究

为弄清楚不同产地的陶缸与原酒陈酿效果之间的关系,更好地指导原酒的科学贮存,选取小曲清香、浓香、酱香3种香型原酒分别放入不同产地的陶缸中陈酿3年,研究陈酿过程中各香型原酒的理化指标和感官风味变化情况。不同产地陶缸所贮3种香型原酒在酒精度、总酸、总酯、色谱骨架成分含量上均不存在明显差异;不同产地陶缸所贮3种香型原酒中的金属元素均存在差异;小曲清香型原酒在不同产地的陶缸中陈酿3年期间的感官无明显差异,浓香型原酒存在轻微差异,酱香型原酒感官差异最明显。

基于“社交-机会”模型的个人财富积累 影响因素仿真研究

目前世界个人财富差距逐渐拉大,研究影响社会财富分配的原因对于缩小财富差距具有重要意义。人与人之间财富的不平等分配,可能是由于他们在天赋、技能、智力等方面自然差异的结果。对人生正面影响机会、负面影响挫折与个体间交互的社交等因素进行建模与分析。将机会、挫折与社交能力作为影响财富积累的因素进行综合考虑,采用基于代理的方法进行仿真,量化实际的机遇、挫折和社交能力在成功的职业生涯中的作用。提出“社交—机会”(SO)模型。对一批工作年限为40年的人群职业发展情况进行仿真。研究表明,机会在成功个体中起着重要作用,其影响可以部分弥补挫折对个人造成的打击,且重要性优于社交能力。同时,社交能力强的人在生活中更容易取得成功。机会和挫折在个人成功中体现出非常明显的初始敏感性,早期出现机会较多的人成功的可能性更高。

线性自由活塞机电混合动力系统研究现状分析

自由活塞机电混合动力系统(Free Piston Electromechanical Hybrid System,简称FPHS)是一种由自由活塞发动机和线性电机直接耦合而成的新型混合动力装置。为了解FPHS发展状况和最新前沿成果,本文简要总结当前FPHS相关研究理论成果,并针对FPHS换气特点和失稳调控方面做出简单分析。

彩超引导下臂丛神经阻滞与盲法穿刺对手术患者麻醉效果对比及对炎症因子水平的影响

目的:观察彩超引导下臂丛神经阻滞与盲法穿刺对手术患者麻醉效果对比及对炎症因子水平的影响。方法:纳入2017年4月~2018年4月在我院行上肢手术的120例患者,随机分为观察组(n=60)和对照组(n=60),对照组实施盲法穿刺肌间沟联合腋路臂丛神经阻滞,观察组行彩超引导下的肌间沟联合腋路臂丛神经阻滞。观察两组患者麻醉效果,对比麻醉用时、药物用量,观察两组血清IL-6和TNF-α水平,统计感染等不良反应发生情况。结果:观察组患者麻醉成功率为98.33%,显著高于对照组的86.67%,差异具有统计学意义;观察组麻醉操作时间、起效时间均短于对照组,局麻药用量少于对照组,差异均具有统计学意义;观察组术后血清IL-6和TNF-α水平均低于对照组,差异具有统计学意义;观察组感染、呼吸困难以及Horner综合征发生率分别为3.33%、1.67%和0%,显著低于对照组的13.33%、11.67%和3.33%,差异均具有统计学意义。结论:彩超引导下的臂丛神经阻滞能够有效提高阻滞成功率,缩短操作时间,减少药物使用剂量,减轻机体炎症水平,提高臂丛阻滞的安全性。

Significantly Enhanced Performance of g-C3N4/Bi2MoO6 Films for Photocatalytic Degradation of Pollutants Under Visible-light Irradiation

The films of photocatalysts have been widely used in decomposition pollutants. In this study, the films were successfully prepared from Bi2MoO6 and g-C3N4/Bi2MoO6 by a simple method, respectively. The samples were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, Fourier transform infrared spectroscopy（FTIR）, photoluminescence（PL）, UV-Vis diffuse reflectance spectroscopy（DRS） and electrochemical experiments to investigate crystalline structure, morphology, composition and properties. The photocatalytic activity of the photocatalyst films for the pollutants was evaluated by degradation of methylene blue（MB） in aqueous solution under visible light irradiation. Experiments revealed that the film of g-C3Na/Bi2MoO6 exhibited higher photocatalytic ability compared to the single-component photocatalyst, and proved its stability. The superior catalytic performance can be attributed to the effective separation of electron-hole pairs and the reduced rate of recombination. This work is of great value for the preparation of photocatalysts films.

Optical frequency synthesizer with an integrated erbium tunable laser

Optical frequency synthesizers have widespread applications in optical spectroscopy,frequency metrology,and many other fields.However,their applicability is currently limited by size,cost,and power consumption.Silicon photonics technology,which is compatible with complementary-metal-oxide-semiconductor fabrication processes,provides a low-cost,compact size,lightweight,and low-power-consumption solution.In this work,we demonstrate an optical frequency synthesizer using a fully integrated silicon-based tunable laser.The synthesizer can be self-calibrated by tuning the repetition rate of the internal mode-locked laser.A 20 nm tuning range from 1544 to 1564 nm is achieved with~10−13 frequency instability at 10 s averaging time.Its flexibility and fast reconfigurability are also demonstrated by fine tuning the synthesizer and generating arbitrary specified patterns over time-frequency coordinates.This work promotes the frequency stability of silicon-based integrated tunable lasers and paves the way toward chip-scale lowcost optical frequency synthesizers.

Philadelphia chromosome-positive acute myeloid leukemia with masses and osteolytic lesions： finding of 18F-FDG PET/CT

Philadelphia chromosome-positive acute myeloid leukemia is controversial and difficult to distinguish from the blast phase of chronic myeloid leukemia. As a myeloid neoplasm, rare cases of this leukemia manifest multiple soft-tissue tumors or bone lyric lesions. In this paper, we describe a 49-year-old male patient who had an abrupt onset with sharp chest pain, fever, fatigue, emaciation, and splenomegaly. 18F-fluoro-deoxy-glucose positron emission tomography/computed tomography （18F-FDG PET/CT） result showed diffuse and uneven hypermetabolic lesions in the bone marrow with peripheral bone marrow expansion, multiple soft tissue neoplasms with high 18F-FDG uptake, and lyric bone lesions. Bone marrow smear and biopsy detected aberrant blast cells expressing myeloid rather than lymphoid immunophenotype marker. For the existence of Philadelphia chromosome and BCR-ABL1 fusion gene together with complex chromosome abnormalities, a diagnosis of Philadelphia-positive acute myeloid leukemia was made, although the type （de novo or blast crisis） remained unclear.

Stable and Efficient Red Perovskite Light-Emitting Diodes Based on Ca^(2+)-Doped CsPbI_(3) Nanocrystals

α-CsPbI3 nanocrystals(NCs)with poor stability prevent their wide applications in optoelectronic fields.Ca^(2+)(1.00Å)as a new B-site doping ion can successfully boost CsPbI3 NC performance with both improved phase stability and optoelectronic properties.With a Ca^(2+)/Pb^(2+)ratio of 0.40%,both phase and photoluminescence(PL)stability could be greatly enhanced.Facilitated by increased tolerance factor,the cubic phase of its solid film could be maintained after 58 days in ambient condition or 4 h accelerated aging process at 120℃.The PL stability of its solution could be preserved to 83%after 147 days in ambient condition.Even using UV light to accelerate aging,the T_(50) of PL could boost 1.8-folds as compared to CsPbI_(3) NCs.Because Ca^(2+) doping can dramatically decrease defect densities of films and reduce hole injection barriers,the red light-emitting diodes(LEDs)exhibited about triple enhancement for maximum the external quantum efficiency(EQE)up to 7.8%and 2.2 times enhancement for half-lifetime of LED up to 85 min.We believe it is promising to further explore high-quality CsPbI_(3) NC LEDs via a Ca^(2+)-doping strategy.

Cross-flow fan on multi-dimensional airflow field of air screen cleaning system for rice grain

With the advancement of agricultural mechanization and the development of combine harvesters, cleaning devices play a very important role in the grain harvesting process. In this study, the DFPF-25 type material floating velocity measuring device was used to measure the suspension velocity of each component of the grain material. Secondly, the DFQX-3 cleaning device was used to conduct the airflow field test, then the fluid simulation of the cleaning shoe was carried out. The results showed that the simulation and experimental results were in a good agreement under the conditions of single fan and double fan. The high-speed flow velocity formed by the double fan system at the tail of the cleaning shoe was 4.76 m/s (simulation) and 4.03 m/s (experiment), which had outstanding cleaning effects on unfilled grains, long stems, and short stems. To sum up, the installation of the cross-flow fan at the rear of the cleaning shoe has a positive effect on the cleaning effect of the combine harvester, and the double-fan cleaning structure composed of the cross-flow fan and the centrifugal fan can significantly improve the cleaning effect.