Phase Transitions Governed by the Fifth Power of the Golden Mean and Beyond

In this contribution results from different disciplines of science were compared to show their intimate interweaving with each other having in common the golden ratio φ respectively its fifth power φ5. The research fields cover model calculations of statistical physics associated with phase transitions, the quantum probability of two particles, new physics of everything suggested by the information relativity theory (IRT) including explanations of cosmological relevance, the ε-infinity theory, superconductivity, and the Tammes problem of the largest diameter of N non-overlapping circles on the surface of a sphere with its connection to viral morphology and crystallography. Finally, Fibonacci anyons proposed for topological quantum computation (TQC) were briefly described in comparison to the recently formulated reverse Fibonacci approach using the Janičko number sequence. An architecture applicable for a quantum computer is proposed consisting of 13-step twisted microtubules similar to tubulin microtubules of living matter. Most topics point to the omnipresence of the golden mean as the numerical dominator of our world.

Predictive Effect of Mean Platelet Volume in Patients with Portal Vein Thrombosis： A Meta-analysis of Case-control Studies

Mean platelet volume （MPV） is an early marker ofplatelet activation. Larger platelets, compared to small ones, increase platelet adhesion and aggregation, and present a higher thrombotic activity. Some studies have explored the association between MPV and the morbidity of portal vein thrombosis （PVT）. The aim of this study was to evaluate the predictive effect of MPV in patients with PVT by a meta-analysis. We searched Pubmed, Web of Science, SCOPUS, OVID, CNKI and CBMD from database inception to September 13, 2017. Seven studies in accordance with selection criteria were included. The extraction of basic data was independently conducted by two reviewers. The mean difference in MPV between PVT patients and controls were pooled with weighted mean difference （WMD） and 95% confidence interval of 0.88 fl （95% CI： 0.61-1.15）. A random-effect model was chosen for an obvious heterogeneity in the pooling （Chi-square=27.12, df=6, P〈0.0001, F=77.9%）. The sources of heterogeneity were from the difference of primary disease of participants and portal vein diameter. Taken together, our results reveal that MPV is a predictive indicator in patients with PVT.

Effect of interaction and temperature on quantum phase transition in anisotropic square-octagon lattice

We investigate the effect of interaction, temperature, and anisotropic parameter on the quantum phase transitions in an anisotropic square-octagon lattice with fermions under the framework of the single band Hubbard model through using the combination of cellular dynamical mean field theory and a continuous time Monte Carlo algorithm. The competition between interaction and temperature shows that with the increase of the anisotropic parameter, the critical on-site repulsive interaction for the metal-insulator transition increases for fixed temperature. The interaction-anisotropic parameter phase diagram reveals that with the decrease of temperature, the critical anisotropic parameter for the Mott transition will increase for fixed interaction cases.

The Characterization and Study of Physical Parameters of Ge Modified Se-Sn-Pb Chalcogenide System

In the present paper, we have studied the effect of Ge addition on the physical properties of Se-Sn-Pb chalcogenide ma- terial. The necessary physical parameters which have important role in determining the structure and strength of the material viz. constraints, coordination number etc. have been calculated. The increasing trend has been found in cohesive energy, heat of atomization and mean bond energy. The glass transition has been studied using the Tichy-Ticha and Lankhorst approaches, which also increases with the increasing Ge contents. The increase in these physical parameters is due to the increasing covalent character in the material.

Solvent effects and potential of mean force study of the SN2 reaction of CH3F+CN-in water

We used a combined quantum mechanics and molecular mechanics （QM/MM） method to investigate the solvent effects and potential of mean force of the CH3F＋CN- reaction in water. Comparing to gas phase, the water solution substantially affects the structures of the stationary points along the reaction path. We quantitatively obtained the solvent effects＇ contributions to the reaction： 1.7 kcal/mol to the activation barrier and -26.0 kcal/mol to the reaction free energy. The potential mean of force calculated with the density functional theory/MM theory has a barrier height at 19.7 kcal/mol, consistent with the experimental result at 23.0 kcal/mol; the calculated reaction free energy at -43.5 kcal/mol is also consistent with the one estimated based on the gas-phase data at -39.7 kcal/mol.

The Effect of Compositional Variation on Physical Properties of Te₉Se₇₂Ge_19-XSb_x(X = 8, 9, 10, 11, 12) Glassy Material

The quaternary chalcogenide glass Te9Se72Ge19-xSbx (x = 8, 9, 10, 11, 12) has been prepared by the melt quench technique. The material fragility increases due to decrease in degree of cross linking in glass matrix as the Sb content increases. The heat of atomization decreases due to lower value of heat of atomization of antimony. The glass transition temperature is calculated by Tichy-Ticha and Lankhorst approaches. The glass seems to have high value of glass transition temperature as per theoretical calculations and is monotonically decreasing with increasing Sb content because increasing concentration of Sb reduces the cohesive energy and mean bond energy of the material.

Functional transition:Inconsistently parallel to the increase in future liver remnant volume after preoperative portal vein embolization

BACKGROUND Preoperative portal vein embolization(PVE)is a widely used strategy to enable major hepatectomy in patients with insufficient liver remnant.PVE induces hypertrophy of the future liver remnant(FLR)and a shift of the functional reserve to the FLR.However,whether the increase of the FLR volume(FLRV)corresponds to the functional transition after PVE remains unclear.AIM To investigate the sequential relationship between the increase in FLRV and functional transition after preoperative PVE using 3-dimensional(3D)computed tomography(CT)and 99mTc-galactosyl-human serum albumin(99mTc-GSA)singlephoton emission computed tomography(SPECT)fusion images.METHODS Thirty-three patients who underwent major hepatectomy following PVE at the Department of Gastroenterological Surgery I,Hokkaido University Hospital between October 2013 and March 2018 were enrolled.Three-phase dynamic multidetector CT and 99mTc-GSA SPECT scintigraphy were performed at pre-PVE,and at 1 and 2 wk after PVE;3D 99mTc-GSA SPECT CT-fused images were constructed from the Digital Imaging and Communications in Medicine data using 3D image analysis system.Functional FLRV(FFLRV)was defined as the total liver volume×(FLR volume counts/total liver volume counts)on the 3D 99m Tc-GSA SPECT CT-fused images.The calculated FFLRV was compared with FLRV.RESULTS FFLRV increased by a significantly larger extent than FLRV at 1 and 2 wk after PVE(P<0.01).The increase in FFLRV and FLRV was 55.1%±41.6%and 26.7%±17.8%(P<0.001),respectively,at 1 wk after PVE,and 64.2%±33.3%and 36.8%±18.9%(P<0.001),respectively,at 2 wk after PVE.In 3 of the 33 patients,FFLRV levels decreased below FLRV at 2 wk.One of the three patients showed rapidly progressive fatty changes in FLR.The biopsy at 4 wk after PVE showed macroand micro-vesicular steatosis of more than 40%,which improved to 10%.Radical resection was performed at 13 wk after PVE.The patient recovered uneventfully without any symptoms of pos-toperative liver failure.CONCLUSION The functional transition lagged behind the increase in FLRV after PVE in some cases.Evaluating both volume and function is needed to determine the optimal timing of hepatectomy after PVE.

Erythropoietin reduces apoptosis of brain tissue cells in rats after cerebral ischemia/reperfusion injury:a characteristic analysis using magnetic resonance imaging

Some in vitro experiments have shown that erythropoietin （EPO） increases resistance to apoptosis and facilitates neuronal survival follow- ing cerebral ischemia. However, results from in vivo studies are rarely reported. Perfusion-weighted imaging （PWI） and diffusion-weighted imaging （DWI） have been applied successfully to distinguish acute cerebral ischemic necrosis and penumbra in living animals; therefore, we hypothesized that PWI and DWI could be used to provide imaging evidence in vivo for the conclusion that EPO could reduce apoptosis in brain areas injured by cerebral ischemia/reperfusion. To validate this hypothesis, we established a rat model of focal cerebral ischemia/ reperfusion injury, and treated with intra-cerebroventricular injection of EPO （5,000 U/kg） 20 minutes before injury. Brain tissue in the ischemic injury zone was sampled using MRI-guided localization. The relative area of abnormal tissue, changes in PWI and DWI in the ischemic injury zone, and the number of apoptotic cells based on TdT-mediated dUTP-biotin nick end-labeling （TUNEL） were assessed. Our findings demonstrate that EPO reduces the relative area of abnormally high signal in PWI and DWI, increases cerebral blood volume, and decreases the number of apoptotic cells positive for TUNEL in the area injured by cerebral ischemia/reperfusion. The experiment pro- vides imaging evidence in vivo for EPO treating cerebral ischemia/reperfusion injury.

Mean-Field Studies of a Mixed Spin-3/2 and Spin-2 and a Mixed Spin-3/2 and Spin-5/2 Ising System with Different Anisotropies

混合 spin-3/2 和混合 spin-3/2 和 spin-5/2 Ising 的磁性有不同 anisotropies 的铁磁性的系统借助于吝啬地的理论(MFT ) 被学习。单个离子的 anisotropy 力量上的阶段图的依赖也被学习。在混合 spin-3/2 和 spin-2 Ising 模型，除秒顺序阶段转变以外，第一顺序混乱阶段转变和 tricritical 线被发现。在混合 spin-3/2 和 spin-5/2 Ising 模型，没有一阶的转变和 tricritical 线。

急倾斜脉群钨矿开采过渡区围岩力学环境变化特征研究

随着现代化采矿工艺的发展,急倾斜脉群矿体正由传统的浅孔留矿法向更高效的阶段矿房法转变,采区围岩力学环境扰动规律也随之改变,特别是在2种采矿方法接替的开采过渡区,可能存在围岩力学环境分布规律的盲区。基于声发射测定的初始地应力采用FLAC3D软件模拟研究了过渡区开采中段采区围岩的力学环境变化特征。结果表明:①上部采区经浅孔留矿法回采出矿后,采区上下盘围岩受到拉应力作用且存在采场边帮松脱的趋势,单脉采场间围岩受应力作用不均匀导致上下端位移交错分布,采区上下盘围岩及单脉采场间围岩以剪切塑性区为主,有发生剪切破坏的风险。②下部采区经阶段矿房法回采出矿后,采区的应力集中现象更加明显,采场顶板出现沉降趋势,采区上下盘围岩向竖直方向变形且两采区位移较连续,采区的顶底板主要为拉伸塑性区且上下盘围岩存在较大范围的剪切塑性区,预示着采区围岩可能同时存在张拉和剪切破坏风险。③对采空区及时进行废石嗣后充填能够有效抑制应力集中现象。矿山在开采过渡区生产时应严格控制上下部相邻采场的开采、充填时序,避免超前开采,进而最大程度抑制应力集中导致的围岩变形、失稳等不利影响。

高糖诱导下人脐静脉内皮细胞形态、增殖活性及钙黏蛋白表达变化

目的探讨不同糖浓度状态下人脐静脉内皮细胞(HUVECs)形态、增殖活性及VE-钙黏蛋白(VE-cadherin)、E-钙黏蛋白(E-cadherin)、N-钙黏蛋白(N-cadherin)表达变化。方法将HUVECs分为正常对照组(葡萄糖浓度5.5 mmol/L)、甘露醇组(葡萄糖浓度5.5 mmol/L+甘露醇浓度24.5 mmol/L)、高糖组(葡萄糖浓度分别为11.1、22.2、33.3 mmol/L),分别培养24、48、72 h,以显微镜观察细胞形态,用CCK-8法检测各组细胞增殖情况,Western blotting法检测各组HUVECs VE-cadherin、E-cadherin、N-cadherin表达。结果培养72 h,正常对照组细胞形态呈类圆形,高糖组、甘露醇组细胞形态由圆形、椭圆形逐渐到条索状,细胞数量减少、细胞间隙较前增加。培养24h,高糖组细胞增殖率高于正常对照组;随糖浓度升高,高糖组细胞增殖率呈现先升高后降低趋势。培养48、72h,高糖组细胞增殖率低于正常对照组;随着糖浓度升高,高糖组细胞增殖率逐渐降低。以上各组细胞增殖率比较均有统计学差异(P均<0.05)。培养24、72 h,与正常对照组比较,高糖组HUVECsN-cadherin、VE-cadherin、E-cadherin蛋白表达明显升高(P均<0.05);且随着葡萄糖浓度升高,高糖组细胞N-cadherin、VE-cadherin、E-caderin蛋白表达呈现先升高后降低的趋势。结论在高糖条件下,HUVECs发生形态转变,增殖率下降,且伴有细胞钙黏蛋白N-cadherin、VE-cadherin、E-cadherin表达变化。

miR-486促人脐静脉内皮细胞内皮间质转化的机制研究

目的 探讨微小RNA-486(miR-486)对人脐静脉内皮细胞(HUVECs)内皮间质转化(End MT)的影响及其调控机制。方法 常规培养HUVECs,并转染miR-486模拟物(mimic)及阴性对照(NC)质粒,实时荧光定量PCR测定miR-486表达;Western blot检测血管内皮细胞钙黏蛋白(VE Cadherin)、Ⅲ型胶原蛋白(CollagenⅢ)、血小板-内皮细胞黏附分子(CD31)、α-平滑肌肌动蛋白(α-SMA)、成纤维细胞特异性蛋白1(FSP1)、纤连蛋白(FN)表达;免疫荧光染色检测细胞中CD31与α-SMA表达;Western blot检测磷酸酶及张力蛋白同源物(PTEN)与磷脂酰肌醇3激酶/蛋白激酶B(PI3K/AKT)信号通路相关蛋白表达。使用PI3K/AKT信号通路抑制剂LY294002与miR-486 mimic共作用于HUVECs,Western blot检测VE Cadherin、CollagenⅢ、CD31、α-SMA、FSP1、FN、PTEN及PI3K/AKT信号通路相关蛋白表达。通过生物信息学在线软件预测miR-486与PTEN的靶向结合位点,构建PTEN 3'UTR野生型(WT)及突变型(MUT)质粒载体,双荧光素酶报告基因实验检测miR-486对PTEN的靶向作用。结果 与Control组和miR-486 NC组比较,miR-486 mimic组HUVECs中miR-486表达升高(P<0.05),VE Cadherin、CD31表达降低(P<0.05),CollagenⅢ、α-SMA、FN表达升高(P<0.05),FSP1表达未发生变化(P>0.05)。免疫荧光结果显示,与Control组和miR-486 NC组比较,miR-486 mimic组HUVECs中CD31表达明显减弱(P<0.05),α-SMA表达明显增强(P<0.05);与Control组和miR-486 NC组比较,miR-486 mimic组HUVECs中PTEN蛋白表达显著降低(P<0.05),p-PI3K和p-AKT蛋白表达显著升高(P<0.05)。与miR-486 mimic组比较,miR-486 mimic+LY294002组PTEN蛋白表达显著升高(P<0.05),p-PI3K和p-AKT蛋白表达显著降低(P<0.05)。与miR-486 mimic组比较,miR-486mimic+LY294002组VE Cadherin、CD31表达显著升高(P<0.05),且CollagenⅢ、α-SMA、FN表达显著降低(P<0.05),FSP1表达未发生变化(P>0.05)。双荧光素酶报告基因分析结果显示,与转染miR-486 NC比较,转染miR-486 mimic能够有效抑制含PTEN原序列的PTEN WT 3'UTR的荧光素酶活性(P<0.05),而对敲除了结合位点的PTEN MUT 3'UTR则无明显抑制作用(P>0.05)。结论miR-486通过抑制PTEN表达促进HUVECs的End MT进程,该机制与激活PI3K/AKT信号通路有关。

平均血小板体积联合血栓弹力图预测全膝关节置换后血栓形成的价值

背景:血栓弹力图对于识别人体血液高凝状态及血栓方面起重要作用,近年来有研究表明平均血小板体积升高与血栓有一定相关性,那么血栓弹力图与平均血小板体积的联合诊断对血栓预测是否更加准确。目的:通过平均血小板体积联合血栓弹力图来预测全膝关节置换后血液的状态及血栓的发生情况。方法:收集2015年5月至2022年3月间接受单侧全膝关节置换的患者120例,根据术后第7天的超声检查结果将患者分为血栓组60例,对照组60例。分别于术前1 d、术后第1天和第7天进行全血细胞和血栓弹力图检查,采用多因素分析全膝关节置换后血栓发生的独立预测因子,并测定受试者工作特征曲线和曲线下面积。结果与结论:平均血小板体积与最大振幅的相关性最强,凝固角其次;术后第1天的平均血小板体积、凝固角是血栓发生的独立预测因子,血栓患者平均血小板体积呈先上升后下降的趋势;平均血小板体积预测血栓的最佳临界值是10.73 fL,受试者工作特征曲线下面积为0.665(95%CI:0.568-0.762,P<0.05);而采用平均血小板体积联合凝固角的受试者工作特征曲线下面积为0.815(95%CI:0.750-0.879,P<0.05);此外,血栓组术后的最大振幅、凝固角、综合凝血指数、平均血小板体积均高于对照组,差异有显著性意义(P<0.05)。结果表明:平均血小板体积可以反映术后血液的高凝状态,全膝关节置换后第1天平均血小板体积与凝固角的联合使用可提高对血栓形成的预测能力。

一维ϕ^(4)平均场中单粒子系统的热力学行为研究

本文利用亥姆霍兹定理对一维ϕ^(4)平均场中单粒子系统的热力学行为进行研究,分析了粒子的运动特征和系统的能量与温度、熵等物理量之间的依赖关系,并对系统发生的热力学行为进行讨论。结果表明:作为一个简单的动力学体系,一维ϕ^(4)单粒子系统同样存在宏观体系所具有的热力学量,且在满足热力学关系的基础上呈现出了小体系特有的相变、负热容、负压缩率等反常热力学行为。这些独特的现象来源于在临界能量处体系能量微小的增加所引起的相轨道空间的突变。该模型中负热容的产生机理,可用于解释Na,Ar,Cu等原子团簇中出现的负热容现象。

冷金属过渡(CMT)技术综述

冷金属过渡(CMT)技术作为一种先进的焊接技术,因其焊接过程中较低的热输入和低飞溅等优点而得到广泛的应用。本文主要对CMT技术的历史由来、工作原理和技术优点进行简要回顾;并且罗列了各种CMT技术类别。对于CMT技术最近以来在同种金属焊接、异种金属焊接和增材制造三大领域的研究与应用的现状进行了介绍;同时介绍一些CMT辅助手段的应用。最后,对CMT技术未来发展前景提出了一些建议。

基于机器学习算法的卷烟营销智能客户拜访策略研究

为提高卷烟行业客户经理的工作效率和服务质量,提出一种基于机器学习算法的卷烟营销智能客户拜访策略。在构建卷烟客户价值分类模型的基础上,利用K均值聚类机器学习算法对零售客户进行分类,合理设置LKH超启发算法和Dijkstra最短路径算法的参数,对客户经理拜访路径进行最优规划和智能导航。仿真结果表明,基于机器学习算法的卷烟营销智能客户拜访策略显著提高了客户经理人均拜访户数、商户满意度,大大缩减了户均在途时间和商户拜访服务覆盖周期。文中提出的策略有助于推动卷烟营销工作质量变革、效率变革和动力变革。

城市轨道交通客流与站点特征分析

交通客流与站点特征的精准分析,对缓解城市交通拥堵,促进轨道交通的良好运营起着至关重要的作用。文中以成都市轨道交通为例,基于AFC数据完成客流特征分析,并采用改进的k-means算法对成都地铁1、2、3号线104个站点进行聚类,最终分为居住导向型、就业导向型、职住交错型、职住交错偏居住型、职住交错偏就业型和综合型6类站点。望为后续车站发展规划及周边土地利用等提供参考依据。

基于K-means聚类分析和多元线性回归的相关流量数据处理方法

相关流量计在油井产出剖面测量中得到了成功的应用。但因传感器、调理电路以及流体本身噪声的影响,相关流量计所测量的渡越时间值会出现少量异常数据,使瞬时流速的计算结果与实际值相差很大,进而平均流量计算也出现较大的测量误差。对此提出基于K-means聚类算法对渡越时间样本数据聚类分析,并根据聚类结果建立多元线性回归预测模型,合理预测渡越时间值,以修正渡越时间的异常值。对预测值与实际值进行比较,最终获得准确的相关流量数据。采用多相流装置的实验数据对所建立的方法进行验证,结果表明,该方法可有效消除渡越时间的异常,优化流量测量的数据,对两相流流量测量有一定的实践意义。