OBE理念下的“测量学”课程思政建设探索

课程思政是指在课程教学过程中潜移默化地加入思政元素,旨在帮助学生形成正确的政治立场、养成正确的价值观、塑造健全的人格,将立德树人的根本任务落到实处。文章作者基于OBE教育理念,将“测量学”课程内容进行重构,在每个模块中加入思政元素。在课程思政建设实施过程中,根据每个模块性质,分别采用“互联网+课程思政”模式、基于OBE教育理念等方式实现思政元素的融入,通过课前预习、课堂上表现考核、课后作业反馈、实验课操作仪器表现和期末成绩等评估学生对课程的掌握程度,从知识的掌握程度、动手能力的提升和综合素质的提高方面对学生进行综合评价。

高职“测量学”课程思政实施路径探索——以玉溪农业职业技术学院为例

为培养适应测绘地理信息领域的高素质人才,以“测量学”课程为例,教师充分挖掘每个教学知识点蕴含的思政元素,在教学中充分融入。同时,教师主动学习、深入企业调研,衔接企业用人需求,在调研的基础上创新教学设计,形成有针对性的教学目标,以构建“测量学”课程的思政教学体系,着力培养学生的爱国情怀、吃苦耐劳的奉献精神、精益求精的工匠精神,提高人才培养质量,实现可持续、高质量发展。

OBE理念框架下“测量学”的教学痛点与改革探索

“测量学”是测绘、水利、土木、地质类等诸多工科专业的必修课,其教学质量的优劣关乎学生毕业要求的达成。基于同行改革经验和自身教学经历,发现课程教学过程中容易出现目标导向不明确、问题导向缺少、课程思政的深度与广度不足、考核评价机制不健全等教学痛点。因此,应革新教学理念,采用线上线下混合教学方式,借助虚拟仿真技术,积极营造有温度的教学环境,构建全过程的闭环反馈考核机制,靶向解决教学痛点,以期实现教学相长。

高职类“测量学”教学改革的思索与探讨

本文从教学目的、教学内容、教学方法和手段、职业道德培养四个方面入手 。

“互联网+”时代“测量学”课程的改革探讨

为进行教学改革,将雨课堂引入到“测量学”课程教学中。结果表明,雨课堂的使用,使智能手机成了学习工具,学生课堂参与度、学习积极性均增强,师生互动更加频繁,还能及时反馈教学效果,更利于教师客观地评价学生学习效果,为开展个性化教学提供帮助。

非测绘专业“测量学”教学改革的思考与探讨

在测绘技术高速发展的情况下 ,针对非测绘专业的“测量学”教学如何改革 ,才能适应社会发展对人才。

后疫情时代虚拟仿真技术在“测量学”课程中的应用研究

新冠疫情作为突发情况,对我国传统本科应用型人才培育教育产生了很大挑战,同时国家对教育信息化的鼓舞与鼎力召唤,线上线下结合的混合式教学方法已然成为后疫情时代教师教学课程的常态化方法。“测量学”是土木类专业的一门主要的专业基础课,为后续部分专业课学习提供了基础,测量知识点具有面广、抽象的特点,同时,作为实践动手能力要求比较高的课程,线上讲解难度较大。为提高后疫情时代学生学习的兴趣,进一步提高应用型人才培养的效果,文章剖析了传统教育形式在“测量学”讲课过程当中的匮乏之处,以土木工程专业为例,尝试将测量虚拟仿真系统增加到线上讲堂和课后的实验操作中,探讨了后疫情时代虚拟仿真技术在应用型测量学人才培养教学中的教学模式设计并进行了教学效果的评价。通过将虚拟仿真技术与讲解相结合,不仅可以增加学生对常识点的直观了解,还能为“测量学”教学改革提供新思路。

高职院校精品课程建设思路研究——以“测量学基础”课程为例

“测量学基础”是高职院校工程测量技术专业的一门专业基础课程,主要培养学生工程测量相关基本知识和技能。对本课程知识掌握的程度直接影响到后续其他核心课程的学习,因此,研究“测量学基础”的教学方法至关重要。文章从课程整体设计、建设方案、创新与特色等方面,阐述了“测量学基础”精品课程建设的实践思路。

传统民宅戏楼声学特性测量

A comprehensive acoustical test was conducted in the traditional Ch ine se in-house theater, the theater of Shi`s residence in Tianjin. The measured pa rameters include reverberation time, clarity, lateral reflectance and IACC. Prim ary analysis was done with the test result.

Improvement of High-Speed Detection Algorithm for Nonwoven Material Defects Based on Machine Vision

Defect detection is vital in the nonwoven material industry,ensuring surface quality before producing finished products.Recently,deep learning and computer vision advancements have revolutionized defect detection,making it a widely adopted approach in various industrial fields.This paper mainly studied the defect detection method for nonwoven materials based on the improved Nano Det-Plus model.Using the constructed samples of defects in nonwoven materials as the research objects,transfer learning experiments were conducted based on the Nano DetPlus object detection framework.Within this framework,the Backbone,path aggregation feature pyramid network(PAFPN)and Head network models were compared and trained through a process of freezing,with the ultimate aim of bolstering the model's feature extraction abilities and elevating detection accuracy.The half-precision quantization method was used to optimize the model after transfer learning experiments,reducing model weights and computational complexity to improve the detection speed.Performance comparisons were conducted between the improved model and the original Nano Det-Plus model,YOLO,SSD and other common industrial defect detection algorithms,validating that the improved methods based on transfer learning and semi-precision quantization enabled the model to meet the practical requirements of industrial production.

Corrosion behavior of T2 copper in 3.5% sodium chloride solution treated by rotating electromagnetic field

Copper is susceptible to producing corrosion problems in corrosive environments, which leads to serious safety problems. Thus, investigating the corrosion behavior of copper is of great significance. The effects of rotating electromagnetic field on corrosion behavior of T2 copper in 3.5% sodium chloride solution with electrochemical measurements were investigated. The results showed that rotating electromagnetic field changed properties of 3.5% sodium chloride solution by increasing the values of temperature and pH and decreasing the values of conductivity and dissolved oxygen. The rotating electromagnetic field improved the corrosion resistance of T2 copper. The corrosion products of T2 copper in treated 3.5% sodium chloride solution were composed of Cu20 and CuCl. The low corrosion rate of T2 copper was resulted from the decrease of dissolved oxygen in 3.5% sodium chloride solution treated by rotating electromagnetic field.

基于相关向量机的电站锅炉NO_x燃烧优化

为了降低电站锅炉NOx排放量,采用一种新的机器学习方法——相关向量机对某330 MW煤粉汽包锅炉的一、二次风速以及含氧量等26个输入参数和NOx输出结果进行建模,并用万有引力算法对模型的参数进行优化,获得最优模型。与粒子群算法、遗传算法优化相关向量机以及万有引力算法优化支持向量机等进行了比较,选择锅炉输入参数中的可调变量为优化变量,以NOx低排放量为目标进行优化,获得低NOx排放的输入参数。结果证明：万有引力优化相关向量机算法建立的模型精确度比其它几种算法高,对模型进行低NOx优化后,NOx输出值由最初的的906.65 mg/m3变为550.600 mg/m3,下降幅度约为38.9%,实现了NOx排放量大幅度降低。

Electrochemical behavior of mesh and plate oxide coated anodes during zinc electrowinning

The catalytic performance of two oxides coated anodes （OCSs） meshes and one OCA plate was investigated in a zinc electrowinning electrolyte at 38 ℃. Their electrochemical behaviors were compared with that of a conventional Pb-0.7%Ag alloy anode. Electrochemical measurements such as cyclic voltammetric, galvanostatic, potentiodynamic, open-circuit potential （OCP） and in situ electrochemical noise measurements were considered. After 2 h of OCP test, the linear polarization shows that the corrosion current density of the Ti/（IrO2-Ta2O5） mesh electrode is the lowest （3.37μA/cm^2） among the three OCAs and shows excellent performance. Additionally, after 24 h of galvanostatic polarization at 50 mA/cm^2and 38 ℃, the Ti/MnO2mesh anode has the highest potential （1.799 V）, followed by the Ti/（IrO2-Ta2O5） plate （1.775 V） and Ti/（IrO2-Ta2O5） mesh （1.705 V） anodes. After 24 h of galvanostatic polarization followed by 16 h of decay, the linear polarization method confirms the sequence obtained after 2 h of OCP test, and the Ti/（IrO2-Ta2O5） mesh attains the lowest corrosion current density. The Ti/（IrO2-Ta2O5） mesh anode also shows better performance after 24 h of galvanostatic polarization with the overpotential lower than that of the conventional Pb-Ag anode by about 245 mV.

Phishing detection method based on URL features

In order to effectively detect malicious phishing behaviors, a phishing detection method based on the uniform resource locator （URL） features is proposed. First, the method compares the phishing URLs with legal ones to extract the features of phishing URLs. Then a machine learning algorithm is applied to obtain the URL classification model from the sample data set training. In order to adapt to the change of a phishing URL, the classification model should be constantly updated according to the new samples. So, an incremental learning algorithm based on the feedback of the original sample data set is designed. The experiments verify that the combination of the URL features extracted in this paper and the support vector machine （SVM） classification algorithm can achieve a high phishing detection accuracy, and the incremental learning algorithm is also effective.

Determination of the Trace Element Contents in Plants Using Atomic Absorption Spectrophotometer

The aim of the study is to investigate the contents of trace element Se, Cd, Pb in three plants including burdock, ginkgol and garlic via graphite furnace atomic absorption and standard addition method. The results show that Se in burdock stem, skin and leaf are 32.40, 48.63, 38.10 μg/g, respectively; Cd in burdock stem, skin and leaf are 0. 160 0, 0. 300 0, 0. 140 0 μg/g, respectively; Cd in burdock stem, skin and leaf are 2. 020, 3. 960, 2. 410 μg/g, respectively. In the ginkgo and ginko leaf, Se contents are 17.63 and 16.91 μg/g, respectively ; for Cd are 0. 181 0 and 0.2020μg/g, respectively ; for Pb are 3. 572 and 4. 021 μg/g, respectively. In garlic, Se, Cd and Pb are 73. 900 0, 6. 900 0 and 0. 390 0, respectively. All the standard deviations of measured results are below 2.3%, recovery rate are from 99% to 101%.

Error-CompensatingFive-SamplePhase-Shifting Algorithm Based on Phase-Shift Error Estimation

A new error compensating five sample phase shifting algorithm which is insensitive to phase shift error is proposed to retrieve the phase distribution of a fringe pattern. It includes two steps. First, the linear phase shift error is estimated using four sample images. Then, the phase distribution is calculated with error corrected by using the phase shift error estimated in the first step. As the equations of error estimation and phase calculation are simple, this new algorithm is practical as well as effective. Computer simulations were carried out to verify the effectiveness of the algorithm. Results of two other well known error compensating algorithms are also presented, which show the new algorithm is the least sensitive to phase shift error.

Research into Uncertainty in Measurement of Seawater Chemical Oxygen Demand by Potassium Iodide-Alkaline Potassium Permanganate Determination Method

Using the glucose and L-glutamic-acid to prepare the standard substance according to the ratio of 1：1, and the artificial seawater and the standard substance to prepare a series of standard solutions, the distribution pattern of uncertainty in measurement of seawater COD is obtained based on the measured results of the series of standard solutions by the potassium iodide-alkaline potassium permanganate determination method. The distribution pattern is as follows： Uncertainty in measurement is big and not constant at the high end, but small and constant at the low end.

Impacts of Agricultural Non-point Pollution on Water-source Area in Songhua Dam

[Objective] The aim was to research impacts of agricultural non-point pol- lution on water-source region in Songhua Dam, laying foundation for control of water pollution and scientific protection of water-source region. [Method] Water in Muyang River, lengshui River and Zizania aquatica region were sampled to measure content of pollutants in water and conclude relation between water contamination and agri- cultural non-point pollution to find the major cause of pollution. [Result] Organic pollu- tant in Muyang River was higher; N and P contents in Lengshui River were higher; the measured indices in Zizania aquatica region excessively exceeded related stan- dard. [Conclusion] The chemical fertilizers and pesticides are the toxic materials lead- ing to water contamination and constitute a major cause of pollution in Songhua Dam water-source region. Agricultural non-point pollution should be controlled in a scientific way.

Psychometric properties of the Care Dependency Scale in stroke survivors in Indonesian hospitals

Purpose: This study aimed to evaluate the psychometric properties of the Indonesian version of the Care Dependency Scale (CDS) among stroke survivors.Methods: The study was undertaken in four hospitals.We analysed datasets obtained from 109 stroke survivors on inpatient wards and in outpatient clinics,who were rated by nurses to determine the CDS reliability coefficients.The Cronbach's α and Cohen's kappa coefficients were applied.Concurrent validity was conducted for the data on care dependency,which werecollected from 49 of these 109 participants on inpatient wards by nurses using the CDS and the Barthel Index.A Spearman's rank correlation analysis was conducted to measure the association between the CDS and the Barthel Index results.Results: An analysis of the results of the CDS tested on the inpatient ward and in the outpatient clinic revealed a high level of internal consistency.The reliability analysis yielded the same Cronbach's α coefficient of 0.98 for both the inpatient and outpatient data.A significant,moderate correlation was observed between the CDS and Barthel Index results.Conclusion: The CDS can be recommended for use as a tool for the assessment and evaluation of stroke survivors who are receiving acute or long-term care.

Computer-aided morphometry of liver inflammation in needle biopsies

AIM: To introduce a computer-aided morphometric method for quantifying the necro-inflammatory phase in liver biopsy specimens using fractal geometry and Delaunay's triangulation.METHODS: Two-micrometer thick biopsy sections taken from 78 chronic hepatitis C virus-infected patients were immunohistochemically treated to identify the inflammatory cells. An automatic computer-aided image analysis system was used to define the inflammatory cell network defined on the basis of Delaunay's triangulation,and the inflammatory cells were geometrically classified as forming a cluster (an aggregation of a minimum of three cells) or as being irregularly distributed within the tissue. The phase of inflammatory activity was estimated using Hurst's exponent.RESULTS: The proposed automatic method was rapid and objective. It could not only provide rigorous results expressed by scalar numbers, but also allow the state of the whole organ to be represented by Hurst's exponent with an error of no more than 12%.CONCLUSION: The availability of rigorous metrical measures and the reasonable representativeness of the status of the organ as a whole raise the question as to whether the indication for hepatic biopsy should be revised by establishing clear rules concerning the contraindications suggested by its invasiveness and subjective interpretation.