How to Behave Well

In order to build a healthy and civilized city,we students should try our best to behave well in many ways.First of all,we must respect old people and polite1 to others.Second,we should make our city clean every day.Don’t throw litter here and there.Third,it’s polite to say'Thank you','Please'and so on.We should never speak2 dirty words.Be friendly to others and always be ready to help others.

Integration of uniform design and quantum-behaved particle swarm optimization to the robust design for a railway vehicle suspension system under different wheel conicities and wheel rolling radii

This paper proposes a systematic method, integrating the uniform design (UD) of experiments and quantum-behaved particle swarm optimization (QPSO), to solve the problem of a robust design for a railway vehicle suspension system. Based on the new nonlinear creep model derived from combining Hertz contact theory, Kalker's linear theory and a heuristic nonlinear creep model, the modeling and dynamic analysis of a 24 degree-of-freedom railway vehicle system were investigated. The Lyapunov indirect method was used to examine the effects of suspension parameters, wheel conicities and wheel rolling radii on critical hunting speeds. Generally, the critical hunting speeds of a vehicle system resulting from worn wheels with different wheel rolling radii are lower than those of a vehicle system having original wheels without different wheel rolling radii. Because of worn wheels, the critical hunting speed of a running railway vehicle substantially declines over the long term. For safety reasons, it is necessary to design the suspension system parameters to increase the robustness of the system and decrease the sensitive of wheel noises. By applying UD and QPSO, the nominal-the-best signal-to-noise ratio of the system was increased from -48.17 to -34.05 dB. The rate of improvement was 29.31%. This study has demonstrated that the integration of UD and QPSO can successfully reveal the optimal solution of suspension parameters for solving the robust design problem of a railway vehicle suspension system.

美国BEHAVE系统中的BURN子系统分析

BEHA VE系统是一组对话式计算机程序,是美国当今用于各种林火管理活动的计算机辅助系统,它包括火行为估计子系统(BURN子系统)和可燃物模拟子系统(FUEL子系统)。FUEL子系统提供了建立可燃物模型的系统方法,它有NEWMDL和TSTMDL两个程序模块。

Effect and regulation ofα-dstroglycan glyco⁃sylation on chronic social defeat induced depressive-like behaviors of mice

OBJECTIVEα-Dstroglycan(α-DG)is a predominant component in the dystrophin-glycoprotein complex(DGC)and a recently char⁃acterized receptor for several extracellular matrix components with high affinity.Recent research⁃es have reported that hypoglycosylation ofα-DG is associated with the pathophysiology of diseas⁃es,especially muscular dystrophy,but little is known about major depressive disorder(MDD).Like-acetylglucosaminyl transferase(Large)is a key enzyme for glycosylation ofα-DG,which mainly modifies two points in the middle domain ofα-DG:Thr-317 and Thr-319.Glycosylatedα-DG(GLY-α-DG)can bind with high affinity to extracellular matrix(ECM)molecules that con⁃tain laminin globular(LG)domains,including per⁃lecan,agrin and neurexin.Agrin is mainly derived from neurons rather than glial cells.In cultured hippocampal neurons,it was found that agrin could regulate the homeostatic plasticity of inhibi⁃tory neurons by acting on GLY-α-DG.Mdx mice are transgenetic models for the investigation of Duchenne muscular dystrophy.Many studies have shown that the expression of GLY-α-DG in the peripheral and brain tissues of Mdx mice is significantly down-regulated.Mdx mice show cognitive impairment and high levels of anxiety.In this study,we employed chronic social defeat stress(CSDS)to establish an animal model of depression and detected the expression of GLY-α-DG among the brain areas associated with the pathophysiology of depression.METHODS So⁃cial interaction test(SIT)and sucrose preference test(SPT)were used to evaluate depressive-like behavior.Open field(OF)and elevated plus maze(EPM)test were used to determine the anxiety-like behavior of Mdx mice.Novelty-sup⁃pressed feeding test(NSFT)forced swim test(FST)and tail suspension test(TST)were used to detect the depressive-like behavior of Mdx mice.Novel object recognition test(NOR)was applied to evaluate the cognition of Mdx mice.Subthreshold social defeat stress was used to explore the susceptibility to stress in Mdx mice.Stereotactic infusion of agrin into the ventral hippocampus(vHip),FST and TST were used to investigate the antidepressant effects of agrin.Adeno-associated virus(AAV)-mediated overex⁃pression techniques,behavior tests and whole-cell path-clamp technique were conducted to determine the impact of Large overexpression on CSDS susceptible mice.RESULTS The expres⁃sion ofα-DG and GLY-α-DG were significantly decreased in the vHip of CSDS susceptible mice.Mdx mice showed decreased expression of GLY-α-DG and increased anxiety-like behav⁃iors.Mdx mice displayed some depressive-like behaviors,and the susceptibility to stress was significantly increased.Downregulation of the expressionα-DG in the vHip by lentivirus increased the susceptibility to stress.Administra⁃tion of agrin to CSDS susceptible mice exerted antidepressant effects,and this effect could par⁃tially sustain for a week.The expression of Large was decreased in vHip.Overexpression of Large through AAV-Large reversed the depressive-like behaviors and restored the decreased frequency and amplitude of mIPSC.CONCLUSION GLY-α-DG and its glycosylase are significantly decreased in CSDS susceptible mice.Adminis⁃tration of agrin and overexpression of Large displays antidepressant effect,which may be related to its promotion of inhibitory synaptic transmission.

父母心理控制与青少年外化问题行为的关系:意志控制和越轨同伴交往的链式中介作用

本研究以生态系统理论和选择理论为基础,考察意志控制、越轨同伴交往在父母心理控制和外化问题行为关系中的链式中介效应。研究使用父母心理控制问卷、意志控制问卷、越轨同伴交往问卷和外化问题行为问卷对1053名中学生进行了调查。结果显示:在控制了人口学变量(性别、年龄以及家庭经济社会地位)后,(1)越轨同伴交往在父母心理控制与青少年外化问题行为之间的中介作用显著;(2)意志控制在父母心理控制与青少年外化问题行为间的中介作用不显著;(3)意志控制和越轨同伴交往在父母心理控制与青少年问题行为之间的链式中介作用显著;(4)中介效应在男女生中呈现相似的显著性模式、在不同学段中不存在显著差异。这些结果对于青少年外化问题的预防与干预提供了一定的启示。

Global Existence, Asymptotic Behavior and Uniform Attractors for Damped Timoshenko Systems

In this paper, we consider the Timoshenko system as an initial-boundary value problem in a one-dimensional bounded domain. And then we establish the global existence and asymptotic behavior of solution by using the semigroup method and multiplicative techniques, then further prove the existence of a uniform attractor by using the method of uniform contractive function. The main advantage of this method is that we need only to verify compactness condition with the same type of energy estimate as that for establishing absorbing sets.

Static behavior of semi-rigid thin-walled steel-concrete composite beam-to-column joints with bolted partial-depth flush end plate:experimental study

A new type of semi-rigid thin-walled steel-concrete composite beam-to-column joint has been proposed in this paper.Five semi-rigid composite beam-to-column joint specimens subjected to hogging moments under monotonic loading were tested to study the static behavior of this new type of joint.The main variable parameters for the five joint specimens were the longitudinal reinforcement ratio and the joint type.The experimental results designated that the magnitude of extension of the longitudinal reinforcement is the most important factor that influenced the moment-rotation characteristic of the new type of joint.The concrete slabs could resist 3.8%-19.1% of the total shear load applied to the cross-sections near the beam-to-column connection.The edge stiffened elements,such as the flange of the lipped I-section thin-walled steel beam,were capable of having considerable inelastic deformation capacity although they had comparatively large width-to-thickness ratios.The shear failure of the concrete cantilever edge strip must be taken into account in practical design because it has significant influence on the anchorage of the longitudinal reinforcement in the new type of external joints.

多场景下基于AHP-EWM的人体健康状态评估模型研究

为解决人体健康评估方法个性化监测不足的问题以及在满足不同场景下健康状态精细化评估的需求,需要一种基于多场景的人体健康状态评估方法来实现长期自动化监测。提出一种基于层次分析法(AHP)和熵权法(EWM)组合的多场景人体健康状态评估模型。首先采集人体在运动、休息、工作/学习和娱乐等4种不同场景下的健康监测指标数据,构建相应的评估指标体系。然后分别根据评估指标计算出AHP和EWM权重,再采用量子粒子群优化(QPSO)算法对AHP和EWM中的主客观权重进行分配,以确保评价指标占比的客观性。最后通过模糊综合评价法对人体健康状态进行评估和量化,并利用实际监测数据对方法的可靠性和稳定性进行验证。实验结果表明,在4种场景下所提方法的综合得分分别为63.78、59.83、58.71和59.21,表明在不同场景下该模型都具有较好的准确性和稳定性。根据评估结果,对测试者的身体状态评价结果进行分析,并给出一些健康建议。所提模型可全面了解人体在不同场景下的健康状况,并为人们提供科学的健康指导,从而为健康管理和疾病预防提供科学依据。

Liquid-like polymer lubricating surfaces:Mechanism and applications

Liquid-like polymer lubricating surfaces(LPLSs)are solid substrates with highly flexible polymer chains grafted via covalent bonds.This unique modification enables ultralow contact-angle hysteresis,repellency of various liquids and bulk ice,and stability.The distinctive wettability and universality of LPLSs have potential applications in liquid motion,biological detection,and environmental protection.In this review,we summarize the mechanisms,preparation,and applications of LPLSs.We discuss the wettability and lubrication mechanisms of liquid droplets on LPLSs.We then categorize LPLS fabrication into“grafted onto”and“grafted from”groups,depending on the type of polymer.We highlight representative applications with recent developments in anti-complex liquid,anti-icing,anti-biological adhesions,biosensing,and photocatalytic activity.Finally,we discuss future challenges and outlooks for LPLSs.

Green Synthesized Liquid-like Dynamic Polymer Chains with Decreased Nonspecific Adhesivity for High-Purity Capture of Circulating Tumor Cells

The capture of circulating tumor cells(CTCs)is of great significance in reducing cancer mortality and complications.However,the nonspecific binding of proteins and white blood cells(WBCs)weakens the targeting capabilities of the capture surfaces,which critically hampers the efficiency and purity of the captured CTCs.Herein,we propose a liquid-like interface design strategy that consists of liquid-like polymer chains and anti-EpCAM modification processes for high-purity and high-efficiency capture of CTCs.The dynamic flexible feature of the liquid-like chains endows the modified surfaces with excellent antiadhesion property for proteins and blood cells.The liquid-like surfaces can capture the target CTCs and show high cell viability due to the environmentfriendly surface modification processes.When liquid-like surface designs were introduced in the deterministic lateral displacement(DLD)-patterned microfluidic chip,the nonspecific adhesion rate of WBCs was reduced by more than fivefold compared to that in the DLD chip without liquid-like interface design,while maintaining comparable capture efficiency.Overall,this strategy provides a novel perspective on surface design for achieving high purity and efficient capture of CTCs.

基于量子行为粒子群算法的舱室噪声监测点优化布置

针对舱室噪声在线监测及声场预报问题,本文提出了一种基于量子行为粒子群算法的舱室内部声监测点优化布置方法。根据研究频段范围确定所需声腔模态阶数,计算全部备选监测点位置处各阶声腔模态的声场分布,采用模态置信矩阵作为目标函数,基于量子行为粒子群算法对监测点位置进行优化,获得优化布置方案。从声腔模态采样的正交性及内外声场响应的角度与其他测点布置方案进行了性能比较。研究表明:本文方法优化得到的测点布置方案采集声腔模态信息更全面,可有效提升舱室内声场的重建精度和基于舱室内声场监测的水下辐射噪声预报精度。

高分子量PE-HD的添加对双峰聚乙烯抗熔垂性能的影响

针对管材用双峰聚乙烯抗熔垂性能不足,导致大口径厚壁管材壁厚尺寸不均的现象,首先应用高温凝胶渗透色谱仪表征了双峰聚乙烯的平均分子量、分子量分布以及短支链分布,对表征结果进行分析发现低分子量部分占比较大是影响双峰聚乙烯抗熔垂性能的重要原因。然后,应用熔体流动速率(MFR)仪、微量混合流变仪、旋转流变仪等研究了高分子量高密度聚乙烯(PE-HD)添加量对双峰聚乙烯抗熔垂性能的影响,同时研究了高分子量PE-HD的添加对双峰聚乙烯结晶熔融行为的影响。结果表明,平均分子量为80万的PE-HD的少量添加就能够明显降低双峰聚乙烯的MFR,提高其挤出加工过程的扭矩和熔体黏度,同时提高体系的零剪切黏度(η0)和松弛时间(λ),而MFR越低、η0和λ越高说明双峰聚乙烯的抗熔垂性能越好,因此实验结果表明高分子量PE-HD的添加能够有效改善双峰聚乙烯的抗熔垂性能。添加少量的平均分子量为80万的PE-HD会降低PE-HD100S的结晶峰值温度并提高其熔融峰值温度。上述研究结果能够对双峰聚乙烯的抗熔垂改性和管材应用起到一定的指导作用。

行权与死义:董仲舒“国灭君死”说考辨——以齐顷公和纪侯为例

“国灭君死之,正也”最早见于《公羊传》,董仲舒对其进行了重新建构。与《公羊传》“君获”而“绝之”的阐释不同,董仲舒认为,“君获”等同于“国灭”,“佚获”较“君获”罪更甚之,“国灭”则君应死之。《公羊传》对逢丑父代君而斮本无褒贬,意在批评齐顷公“佚获”,董仲舒则以齐顷公无耻和纪侯死国阐发“贤死义”之义理,且将其纳入经权讨论,认为只有臣子在危亡之际可行权,国君则不能。董仲舒将纪季在纪国灭亡之际以酅入于齐的行为,解读为纪侯命其弟所为,纪侯的存社稷是以纪季代为行权实现的,变《公羊传》的“贤纪季”为“贤纪侯”。董仲舒“国灭君死”说虽与《公羊传》有所差异,但其与公羊义理一脉相承,因而可以说是对公羊义理的完善和发展。

利用可穿戴设备监测学龄儿童量化用眼行为并定量分析近视发生相关因素

目的:探索一种无创的、智能可穿戴设备监测学龄儿童量化的用眼行为,并定量分析近视发生的相关因素。方法:招募佛山市禅城区石湾第二小学三年级及狮城中学小学部五年级的年龄为7~11岁部分学生共171例。所有受试者均按照非睫状肌麻痹主觉验光结果分为近视组108例和非近视组63例,所有受试者均佩戴智能可穿戴设备“云夹”,进行为期10 d(2022年9月21日—2022年10月2日)的用眼行为数据(近距离用眼距离、近距离用眼时间、近距离环境光照、有效户外时间)采集。采用t检验比较近视组与非近视组儿童在用眼行为数据之间的差异,并应用Logistic回归分析用眼行为与近视发生的相关性。绘制受试者操作特征(receiver operating characteristic curve,ROC)曲线,并计算曲线下面积(area under curve,AUC)分析用眼行为习惯对近视发生的预测价值。结果:学龄期儿童近视患病率为63.2%。近视组与非近视组在每天用眼时间、单次用眼时间、用眼距离、白天用眼光照、晚上用眼光照、每天户外活动时间及每天有效户外活动暴露次数比较差异均有统计学意义(均P<0.05)。Logistic回归分析显示,单次用眼时间、每天用眼时间是近视发生的危险因素。Spearman相关性分析显示,单次用眼时间及每天用眼时间均与近视发生呈正相关(均P<0.05)。单次用眼时间预测近视发生的ROC曲线下面积为0.939。结论:可穿戴设备“云夹”可量化学龄期儿童用眼行为;学龄期儿童近视发生可能与近距离用眼时间有一定相关性;预测模型可结合儿童屈光发育档案,量化近视发生风险,对儿童实现分类管理,及时采取个性化干预。

惯性权自适应调整的量子粒子群优化算法

针对量子粒子群的惯性权值β线性递减不能适应复杂的非线性优化搜索过程的问题,提出了一种惯性权自适应调整的量子粒子群优化(DCWQPSO)算法.在该算法中,引入了量子粒子群进化速度因子sd和聚集度因子jd,并将惯性因子β表示为sd,jd2个参数的函数.在每次迭代时,算法可根据当前量子粒子群进化速度因子和聚集度因子动态地调整惯性权值,从而使算法具有动态自适应性.对典型的标准函数的测试结果表明,与量子粒子群算法相比,改进后的量子粒子群优化算法的收敛速度明显提高.

特效植物营养素对杂交稻性状表现及表观遗传效应的影响

将用特效植物营养素(SPNE)处理水稻父母本获得的杂交种子和对照种子在同一条件下种植并进行不同处理,比较F1代的性状表现。结果表明,上代用SPNE处理父母本后代的单株产量还能超过对照产生表观遗传效应,两代用SPNE处理的单株产量最高。SPNE对产量性状的影响较大,主要表现在使实粒数增加(与单株产量成正相关),对株高、穗长、等性状影响较小(与单株产量不成正相关),不同处理的效果有差异;将它们的种子在同样条件下萌发生长,比较F2代的差异,结果显示前代用SPNE处理的种子发芽率、淀粉酶活性以及幼苗株重、叶绿素含量、蛋白质含量等均超过对照,SPNE处理后在F2代也能产生表观遗传效应,两代用SPNE处理的种子表观遗传效应表现最好。

自闭症儿童行为评定与社会认知发展的研究

本研究用自闭症儿童发展评定量表 ,自闭症儿童基本社会认知问卷 ,以及“ToM”实验 ,对4 9名自闭症儿童及 3 0名弱智儿童进行了行为评定与社会认知的研究。研究结果为目前国内自闭症的诊断和治疗提供了新的有效工具及进一步明确化的理论依据 ,并为其教育训练提供了评定标准和新的启示。

具有量子行为的粒子群优化算法的参数选择

Sun等人从量子力学的角度提出了具有量子行为的粒子群优化算法,它在搜索能力上优于传统的PSO算法,自适应参数的数目也比之较少。集中讨论了应用QPSO如何选择自适应参数的问题。介绍了QPSO算法,给出了随机模拟的实验结果,从而看到了参数值的选择如何影响粒子在QPSO中的收敛。最后,介绍了两种自适应参数控制方法和标准测试函数的实验结果。

改进量子粒子群算法在水电站群优化调度中的应用

针对量子粒子群算法求解水电站群优化调度问题存在的早熟收敛、寻优能力欠佳等缺陷,从种群初始化、进化和变异等方面提出了改进量子粒子群算法。该方法引入混沌搜索增强初始种群质量;通过加权更新种群最优位置中心改善种群进化模式并提升收敛速度;利用邻域变异搜索增加种群多样性避免早熟收敛。同时依据问题特点设计了矩阵实数编码方式与复杂约束处理方法。乌江梯级综合对比分析表明所提方法能切实保证快速获得高质量优化调度结果,有效提高梯级水能利用率,如长序列模拟调度较逐步优化算法分别减少8.9%的弃水和72.3%的耗时,是一种适用于大规模水电站群优化调度的高效实用方法。

基于Rothermel模型的北京鹫峰国家森林公园潜在火行为

Rothermel模型以燃烧物理学为理论基础,基于能量守恒定律,属于物理机理模型。基于Rothermel模型,利用Behave Plus 5.0 5软件,采用自定义可燃物参数模型,通过输入不同的可燃物模型参数,包括不同时滞的地表枯枝负荷量、可燃物床层厚度、含水率、热值、风速、坡度等,研究计算了不同可燃物湿度条件下北京鹫峰国家森林公园潜在地表火行为状况,即蔓延速率、单位面积发热量、火线强度和火焰高度等。结果表明:4种林型火行为指标均随可燃物湿度、坡度增大而降低,油松Pinus tabuliformis林极易发生高强度地表火,侧柏Platycladus orientalis林易发生中强度地表火,华北落叶松Larix principis-rupprechtii因本身难燃,仅可能发生低强度地表火,栓皮栎Quercus variabilis林因地表凋落物累积较多,且林分通风条件好,在低湿度、干旱条件下易发生中等强度地表火,对林分结构造成破坏。因此,在护林防火工作中,我们要以油松、侧柏林防火为主,及时清理林下有效可燃物,减少可燃物累积,防止林火的发生与蔓延,最大程度减少森林资源损失。