多位一体协同赋能广东省职教城(清远)产教融合研究

产教融合能够推动职业教育人才链与产业链的有机衔接,只有深化产教有机融合,才能推动职业教育高质量发展。构建有效的产教融合协同育人模式,需要构建以政府为主导、以学校为主体,企业、行业、社会共同参与的良好互动格局,多方力量协同努力方可实现。该文以广东职教城(清远)产教融合为例,探讨政校企行社多位一体协同合作模式,以期推进广东省职教城产教融合工作。

广州市海洋主导产业选择研究

本文基于广州海洋经济发展资源条件,结合海洋主导产业内涵和选择原则,运用钻石模型的海洋产业生产要素、需求条件、竞争力、关联产业支撑、政策规划导向和机遇等六个要素对地区海洋主导产业选择进行分析,并通过构造麦肯锡矩阵对比验证。结果表明:广州应将海洋交通运输业、海洋旅游业、海洋化工业、高端船舶与海工装备确定为海洋主导产业。最后提出新发展阶段广州海洋产业发展方向与重点,助力广州海洋经济高质量发展、海洋创新发展之都建设取得成效。

融入思政元素的案例教学在“水工建筑物”中的应用

“水工建筑物”是水利水电工程专业的核心课程,该文针对课程教学过程中存在的问题,提出融入思政元素的案例教学方法,构建课程思政体系。以“拱坝概述”教学单元为例,进行以典型工程案例白鹤滩水电站为主线的思政课程教学设计。实践表明,该教学方法既能有效激发学生的学习兴趣,提高学生解决复杂工程问题的能力,又能增强学生的家国情怀和职业荣誉感,培养学生的严谨作风、工匠精神。该课程的教学方法对工科类专业课程的课程思政建设具有借鉴意义。

大学生党员思想状况调查与分析--以广州中医药大学为例

文章通过问卷方式，抽样调查当前大学生党员思想状况，了解学生党员入党动机、理想信念、宗教信仰、政治学习、组织生活、党群关系、模范作用等方面的看法与态度，从而充分了解和分析大学生党员的思想状况，积极探索大学生党员思想建设的有效方法与途径，加强对学生党员的管理和教育，进一步提高大学生党员思想政治教育的针对性与实效性。

Inter-agency government information sharing under data-driven blockchain framework

The inter-agency government information sharing(IAGIS)plays an important role in improving service and efficiency of government agencies.Currently,there is still no effective and secure way for data-driven IAGIS to fulfill dynamic demands of information sharing between government agencies.Motivated by blockchain and data mining,a data-driven framework is proposed for IAGIS in this paper.Firstly,the blockchain is used as the core to design the whole framework for monitoring and preventing leakage and abuse of government information,in order to guarantee information security.Secondly,a four-layer architecture is designed for implementing the proposed framework.Thirdly,the classical data mining algorithms PageRank and Apriori are applied to dynamically design smart contracts for information sharing,for the purposed of flexibly adjusting the information sharing strategies according to the practical demands of government agencies for public management and public service.Finally,a case study is presented to illustrate the operation of the proposed framework.

TPOL triggers apoptosis with mitochondrial injury through activating a ROS-dependent p53/p21/p27/Rb/Bax/Cyto C/caspase-mediated signaling

AIM:To explore the influence of ethyl(2,4,6-trimethylbenzoyl)phenylphosphinate(TPOL)on cell apoptosis and its potential mechanism.METHODS:HEK293T cells sensitive to TPOL were treated with different concentrations of TPOL with or without exposure to light radiation,before treatment with various inhibitors,N-acetyl-Lcysteine(NAC),pifithrin-αand Z-DVED-FMK.Cell viability was measured by CCK-8 assay.Annexin V/propidium iodide staining was used to count the number of apoptotic cells.DCFH-DA staining was used to detect reactive oxygen species(ROS)levels,and JC-1 staining was used to assess mitochondrial membrane potential by flow cytometry.The expression of apoptosis-related proteins and cell cycle-regulated molecules was measured by Western blot.RESULTS:TPOL enhanced the apoptosis of HEK293T cells in a dose-dependent manner(P<0.05),with a decrease in Bcl-2 and increases in Bax and cytochrome C(Cyto C),followed by up-regulation of activated caspase-9 and caspase-3,and the cleavage of PARP(P<0.05).The TPOL-enhanced cleavage of caspase-3 and PARP was rescued by Z-DVED-FMK(P<0.01).TPOL also led to a rapid increase in ROS,a reduction in mitochondrial membrane potential,and the release of Cyto C(P<0.01),all of which could be reversed by the ROS scavenger NAC.Moreover,the TPOL-caused alterations in p21,p27,Rb,and CDK2 were also recovered by the p53 inhibitor pifithrin-α(P<0.05).The TPOL-induced changes in Bax,Bcl-2,cleaved caspase-9,activated caspase-3,and cleaved PARP were subsequently rescued by pretreatment with pifithrin-α(P<0.05).CONCLUSION:TPOL can induce cellular apoptosis with ROS-mediated mitochondrial membrane damage through the activation of a ROS-dependent p53/p21/p27/Rb/Bax/Cyto C/caspase-mediated signal axis.

Ultrafast pulse wave velocity technique for evaluating changes of carotid artery elasticity in Hashimoto thyroiditis patients with euthyroidism

Objective To explore the value of ultrafast pulse wave velocity(UFPWV)technique for evaluating changes of carotid artery elasticity in Hashimoto thyroiditis(HT)patients with euthyroidism.Methods Conventional ultrasound and UFPWV for carotid artery were prospectively performed in 91 HT patients with euthyroidism(HT group)and 81 healthy subjects(control group).Clinical data and ultrasonic parameters were compared between groups.Spearman correlation analysis was performed to observe the correlations of carotid pulse wave velocity in end of systole(PWV-ES)with clinical indexes and other ultrasonic parameters in HT group.Multiple stepwise linear regression analysis was used to screen the independent impact factors of increased carotid PWV-ES in HT group.Results Significant differences of thyroid peroxidase antibody(TPOAb),thyroglobulin antibody(TgAb),total cholesterol(TC),low density lipoprotein and neutrophil-lymphocyte ratio(NLR)were found between groups(all P<0.05).The carotid PWV-ES in HT group was significantly higher than that in control group(P<0.05),while no significant difference of carotid artery intima-media thickness(CIMT)nor carotid pulse wave velocity in beginning of systole(PWV-BS)was found between groups(both P>0.05).Carotid PWV-ES in HT group was positively correlated with patients'age,body mass index,TPOAb,TC,triglyceride,NLR and CIMT(r=0.217—0.707,all P<0.05).Patients'age,TPOAb and NLR were all independent impact factors of increased carotid PWV-ES in HT patients with euthyroidism(all P<0.05).Conclusion UFPWV technique could be used to evaluate changes of carotid artery elasticity in HT patients with euthyroidism,among which PWV-ES was relatively sensitive.

Self-supervised learning artificial intelligence noise reduction technology based on the nearest adjacent layer in ultra-low dose CT of urinary calculi

Objective To observe the value of self-supervised deep learning artificial intelligence(AI)noise reduction technology based on the nearest adjacent layer applicated in ultra-low dose CT(ULDCT)for urinary calculi.Methods Eighty-eight urinary calculi patients were prospectively enrolled.Low dose CT(LDCT)and ULDCT scanning were performed,and the effective dose(ED)of each scanning protocol were calculated.The patients were then randomly divided into training set(n=75)and test set(n=13),and a self-supervised deep learning AI noise reduction system based on the nearest adjacent layer constructed with ULDCT images in training set was used for reducing noise of ULDCT images in test set.In test set,the quality of ULDCT images before and after AI noise reduction were compared with LDCT images,i.e.Blind/Referenceless Image Spatial Quality Evaluator(BRISQUE)scores,image noise(SD ROI)and signal-to-noise ratio(SNR).Results The tube current,the volume CT dose index and the dose length product of abdominal ULDCT scanning protocol were all lower compared with those of LDCT scanning protocol(all P<0.05),with a decrease of ED for approximately 82.66%.For 13 patients with urinary calculi in test set,BRISQUE score showed that the quality level of ULDCT images before AI noise reduction reached 54.42%level but raised to 95.76%level of LDCT images after AI noise reduction.Both ULDCT images after AI noise reduction and LDCT images had lower SD ROI and higher SNR than ULDCT images before AI noise reduction(all adjusted P<0.05),whereas no significant difference was found between the former two(both adjusted P>0.05).Conclusion Self-supervised learning AI noise reduction technology based on the nearest adjacent layer could effectively reduce noise and improve image quality of urinary calculi ULDCT images,being conducive for clinical application of ULDCT.

Realizing efficient electrochemical oxidation of 5-hydroxymethylfurfural on a freestanding Ni(OH)_(2)/nickel foam catalyst

With the continuous improvement of solar energy production capacity,how to effectively use the electricity generated by renewable solar energy for electrochemical conversion of biomass is a hot topic.Electrochemical conversion of 5-hydroxymethylfurfural(HMF)to biofuels and value-added oxygenated commodity chemicals provides a promising and alternative pathway to convert re-newable electricity into chemicals.Although nickel-based eletrocatalysts are well-known for HMF oxidation,their relatively low intrinsic activity,poor conductivity and stability still limit the poten-tial applications.Here,we report the fabrication of a freestanding nickel-based electrode,in which Ni(OH)_(2) species were in-situ constructed on Ni foam(NF)support using a facile ac-id-corrosion-induced strategy.The Ni(OH)2/NF electrocatalyst exhibits stable and efficient electro-chemical HMF oxidation into 2,5-furandicarboxylic acid(FDCA)with HMF conversion close to 100% with high Faraday efficiency.In-situ formation strategy results in a compact interface between Ni(OH)_(2) and NF,which contributes to good conductivity and stability during electrochemical reac-tions.The superior performance benefits from dynamic cyclic evolution of Ni(OH)_(2) to NiOOH,which acts as the reactive species for HMF oxidation to FDCA.A scaled-up device based on a continu-ous-flow electrolytic cell was also established,giving stable operation with a high FDCA production rate of 27 mg h^(-1)cm^(−2).This job offers a straightforward,economical,and scalable design strategy to design efficient and durable catalysts for electrochemical conversion of valuable chemicals.

Study on Joint Method of 3D Acoustic Emission Source Localization Simplex and Grid Search Scanning

Acoustic emission(AE)source localization is a fundamental element of rock fracture damage imaging.To improve the efficiency and accuracy of AE source localization,this paper proposes a joint method comprising a three-dimensional(3D)AE source localization simplex method and grid search scanning.Using the concept of the geometry of simplexes,tetrahedral iterations were first conducted to narrow down the suspected source region.This is followed by a process of meshing the region and node searching to scan for optimal solutions,until the source location is determined.The resulting algorithm was tested using the artificial excitation source localization and uniaxial compression tests,after which the localization results were compared with the simplex and exhaustive methods.The results revealed that the localization obtained using the proposed method is more stable and can be effectively avoided compared with the simplex localization method.Furthermore,compared with the global scanning method,the proposed method is more efficient,with an average time of 10%–20%of the global scanning localization algorithm.Thus,the proposed algorithm is of great significance for laboratory research focused on locating rupture damages sustained by large-sized rock masses or test blocks.

Local existence and uniqueness of solutions to the evolutionary model for magnetoviscoelasticity

In this paper,we prove the local existence and uniqueness of solutions to the evolutionary model for magnetoviscoelasticity in R^(2),R^(3).This model consists of an incompressible Navier-Stokes,a regularized system for the evolution of the deformation gradient and the Landau-Lifshitz-Gilbert system for the dynamics of the mag-netization.Our approach depends on approximating the system with a sequence of perturbed systems.

BANACH ALGEBRA STRUCTURE IN DERIVATIVE HARDY SPACES

In this paper,we consider the algebraic structure of derivative Hardy Spaces.By using the method of[6,12,15],we get the Duhamel product forming Banach algebra in derivative Hardy Spaces,and invertibility criterion,and describe the extended eigenvalue of the integral operator V.We generalize the results in[1,2,6,11,16].

Polar residual network model for assisting evaluation on rat myocardial infarction segment in myocardial contrast echocardiography

Objective To investigate the value of polar residual network(PResNet)model for assisting evaluation on rat myocardial infarction(MI)segment in myocardial contrast echocardiography(MCE).Methods Twenty-five male SD rats were randomly divided into MI group(n=15)and sham operation group(n=10).MI models were established in MI group through ligation of the left anterior descending coronary artery using atraumatic suture,while no intervention was given to those in sham operation group after thoracotomy.MCE images of both basal and papillary muscle levels on the short axis section of left ventricles were acquired after 1 week,which were assessed independently by 2 junior and 2 senior ultrasound physicians.The evaluating efficacy of MI segment,the mean interpretation time and the consistency were compared whether under the assistance of PResNet model or not.Results No significant difference of efficacy of evaluation on MI segment was found for senior physicians with or without assistance of PResNet model(both P>0.05).Under the assistance of PResNet model,the efficacy of junior physicians for diagnosing MI segment was significantly improved compared with that without the assistance of PResNet model(both P<0.01),and was comparable to that of senior physicians.Under the assistance of PResNet model,the mean interpretation time of each physician was significantly shorter than that without assistance(all P<0.001),and the consistency between junior physicians and among junior and senior physicians were both moderate(Kappa=0.692,0.542),which became better under the assistance(Kappa=0.763,0.749).Conclusion PResNet could improve the efficacy of junior physicians for evaluation on rat MI segment in MCE images,shorten interpretation time with different aptitudes,also improve the consistency to some extent.

Local existence and uniqueness of the incompressible Navier-Stokes-Landau-Lifshitz equations with the Dzyaloshinskii-Moriya interaction and V-flow term

In this paper,we prove that there exists a unique local solution for the Cauchy problem of a system of the incompressible Navier-Stokes-Landau-Lifshitz equations with the Dzyaloshinskii-Moriya interaction and V-flow term inR^(2) and R^(3).Our methods rely upon approximating the system with a perturbed parabolic system and parallel transport.

“研学后教”理念下中学语文课堂教学效果有效性研究——以广州南村侨联中学为例

“研学后教”理念是广州市番禺区于2012年启动的新型教学模式,其最终目的是实现学习方式的转变,构建具有特色、充满活力、高效和谐的课堂教学模式.本文即从转变学生学习方式、达成课堂教学目标、建构“五环联动·情智课堂”课堂模式以及提升教育教学质量三个方面来探析“研学后教”理念下中学语文课堂教学效果的有效性.

A new species in the genus Diaonidia Takahashi(Hemiptera:Coccomorpha:Diaspididae)from China

A new armoured scale,Diaonidia litsea sp.nov.,is described and illustrated.It was found on Litsea monopetala(Roxb.)Pers.in Hainan,China.This new species can be easily distinguished by:the anterior spiracles each with 2–3 discoidal glands;pygidium with 2 pairs of well-developed lobes,and the area around mouthpart strongly sclerotized.An identification key to the adult females in the genus Diaonidia is also provided.

90后大学生理想信念现状分析及对策研究——以华南理工大学广州学院为例

高校是人才培养的重要基地，新的历史时期，由于国际国内环境的深刻变化，给大学生的政治信仰、思想观念、价值观念、道德观念、生活观念等带来了巨大冲击，大学生的理想信念教育面临新的挑战。通过调查90后大学生理想信念的现状，分析其中存在的问题，并就相关问题提出对策和建议，帮助他们树立崇高的理想信念，实现自我价值。

管理育人视野下青年学生思想引领的创新路径——基于虚拟现实技术的视角

青年学生是中国特色社会主义事业的接班人,青年学生的思想水平、政治觉悟、道德品质、法治观念和文化素质关系中华民族伟大复兴。当前,高职院校思想政治教育面临理想信念淡漠、价值共识消解、理论揭示力弱化、教育方式协同性不足等问题,亟须高职院校积极探索管理育人新理念、新方式、新路径来提升青年学生思想引领的实效性。从提升青年学生思想引领实效性这一角度出发,该文拟通过虚拟现实技术创建虚拟环境来帮助青年学生提高自我认同、政治认同、文化认同,从而提升高职院校管理育人工作思想引领的实效性。

论三级制顶岗实习的教学成果——以广州番禺职业技术学院玩具质量检验与管理专业顶岗实习为例

在我国高职院校的教学计划安排中,顶岗实习是一门重要的专业核心课程,顶岗实习通常是在学生毕业当学期执行的.在广州番禺职业技术学院玩具质量检验管理专业中,顶岗实习是以三级制的方式进行的.三级制顶岗实习,是指即“一年级职业训导,二年级专业技能训练,三年级岗位技能实习”,同时将职业道德教育、专业兴趣教育和企业文化教育贯穿顶岗实习全过程.

浅析独立学院学士学位授予工作存在的问题及对策——以广州大学松田学院为例

本文从我国独立学院学士学位授予现状入手，对广州大学松田学院2015届毕业生学士学位授予情况进行分析，结合独立学院特性，对独立学院学士学位授予工作提出建议。