Classification and Net Primary Productivity of the Southern China's Grasslands Ecosystem Based on Improved Comprehensive and Sequential Classification System(CSCS) Approach

This research classified vegetation types and evaluated net primary productivity （NPP） of southern China＇s grasslands based on the improved comprehensive and sequential classification system （CSCS）, and proposed 5 thermal grades and 6 humidity grades. Four classes of grasslands vegetation were recognized by improved CSCS, namely, tundra grassland class, typical grassland class, mixed grassland class and alpine grassland class. At the type level, 14 types of vegetations （9 grasslands and 5 forests） were classified. The NPP had a trend to decrease from east to west and south to north, and the annual mean NPP was estimated to be 656.3 g C m-2 yr-1. The NPP value of alpine grassland class was relatively high, generally more than 1200 g C m2 yr-1. The NPP value of mixed grassland class was in a range from 1 000 to 1200 g C m-2 yr-1. Tundra grassland class was located in southeastern Tibet with high elevation, and its NPP value was the lowest （〈600 g C m＇2yrl）. The typical grassland class distributed in most of the area, and its NPP value was generally from 600 to 1000 g C m-2 yr-1. The total NPP value in the study area was 68.46 Tg C. The NPP value of typical grassland class was the highest （48.44 Tg C）, and mixed grassland class was the second （16.54 Tg C）, followed by alpine grassland class （3.22 Tg C）, with tundra grassland class being the lowest （0.25 Tg C）. For all the grasslands types, the total NPP of forest meadow was the highest （34.81 Tg C）, followed by sparse forest brush （16.54 Tg C）, and montane meadow was the lowest （0.01 Tg C）.

A Study on the improvement strategies to Effectiveness of Online Teaching and Learning in EFL Classes in College

English online learning has been common trend in the world, how to teach and learn effectively in EFL classes through online environment is an urgent study. The purpose of the study to analyze the factors of affecting the effectiveness of online teaching and learning in EFL classes in college. We build up a three-dimensional model in the perspective of teacher, learner and technology. And we propose the strategies of improving the effectiveness of online teaching and learning in EFL classes in college in the dimensions of teacher, learner and technology.

Establish Green Industry System,Improve the Comprehensive Utilization Level of Salt Lake Resources,and Create A New Pattern of Green Sustainable Development in Qaidam Basin

Qaidam Basin in Qinghai Province has rich multiple complex resources with salt lakes as the core.These resources form a special condition for the development of green economy,having rare and particular nature.The

Quantum Spin Liquid Phase in the Shastry–Sutherland Model Detected by an Improved Level Spectroscopic Method

We study the spin-1/2 two-dimensional Shastry–Sutherland spin model by exact diagonalization of clusters with periodic boundary conditions, developing an improved level spectroscopic technique using energy gaps between states with different quantum numbers. The crossing points of some of the relative(composite) gaps have much weaker finite-size drifts than the normally used gaps defined only with respect to the ground state, thus allowing precise determination of quantum critical points even with small clusters. Our results support the picture of a spin liquid phase intervening between the well-known plaquette-singlet and antiferromagnetic ground states, with phase boundaries in almost perfect agreement with a recent density matrix renormalization group study, where much larger cylindrical lattices were used [J. Yang et al., Phys. Rev. B 105, L060409(2022)]. The method of using composite low-energy gaps to reduce scaling corrections has potentially broad applications in numerical studies of quantum critical phenomena.

The Implementation of GB/T 19000 Promotes the Advancement of the Management Level of the Leather Industry

Focusing on the economic development of its leather industry,Xinji City in the center ofHebei Province adheres to the scientific concept of development,strives to explore new ideas for industrialdevelopment,and makes tireless efforts to implement the GB/T19000 Quality Managementand Quality Assurance.This deepens the standardization of the leather industry and improves thelevel of enterprise management,serving both the economy and the enterprises.

Classification of Infrared Monitor Images of Coal Using an Feature Texture Statistics and Improved BP Network

It is very important to accurately recognize and locate pulverized and block coal seen in a coal mine's infrared image monitoring system. Infrared monitor images of pulverized and block coal were sampled in the roadway of a coal mine. Texture statistics from the grey level dependence matrix were selected as the criterion for classification. The distributions of the texture statistics were calculated and analysed. A normalizing function was added to the front end of the BP network with one hidden layer. An additional classification layer is joined behind the linear layer. The recognition of pulverized from block coal images was tested using the improved BP network. The results of the experiment show that texture variables from the grey level dependence matrix can act as recognizable features of the image. The innovative improved BP network can then recognize the pulverized and block coal images.

Intramolecular Hydrogen Bond Improved Durability and Kinetics for Zinc‑Organic Batteries

Organic compounds have the advantages of green sustainability and high designability,but their high solubility leads to poor durability of zinc-organic batteries.Herein,a high-performance quinone-based polymer(H-PNADBQ)material is designed by introducing an intramolecular hydrogen bonding(HB)strategy.The intramolecular HB(C=O⋯N-H)is formed in the reaction of 1,4-benzoquinone and 1,5-naphthalene diamine,which efficiently reduces the H-PNADBQ solubility and enhances its charge transfer in theory.In situ ultraviolet-visible analysis further reveals the insolubility of H-PNADBQ during the electrochemical cycles,enabling high durability at different current densities.Specifically,the H-PNADBQ electrode with high loading(10 mg cm^(-2))performs a long cycling life at 125 mA g^(-1)(>290 cycles).The H-PNADBQ also shows high rate capability(137.1 mAh g^(−1)at 25 A g^(−1))due to significantly improved kinetics inducted by intramolecular HB.This work provides an efficient approach toward insoluble organic electrode materials.

The study of college secondary department student status management and countermeasures——as KunmingUniversity of engineering secondary departments for case analysis

The management of College Students’ status is a professional policy work. The point of regulating college students’learningbehavior is registration management. According to the analysis on the issue of popular education stage of college registration management,it’s important to reinforce the registration management of affi liated college and put forward work ideas, formulate detailed measures. Thatcan regulate and optimize students’ learning behavior and promote school spirit, teaching style, study style, improve the effectiveness of theeducation of students.

Ensemble Learning Models for Classification and Selection of Web Services: A Review

This paper presents a review of the ensemble learning models proposed for web services classification,selection,and composition.Web service is an evo-lutionary research area,and ensemble learning has become a hot spot to assess web services’earlier mentioned aspects.The proposed research aims to review the state of art approaches performed on the interesting web services area.The literature on the research topic is examined using the preferred reporting items for systematic reviews and meta-analyses(PRISMA)as a research method.The study reveals an increasing trend of using ensemble learning in the chosen papers within the last ten years.Naïve Bayes(NB),Support Vector Machine’(SVM),and other classifiers were identified as widely explored in selected studies.Core analysis of web services classification suggests that web services’performance aspects can be investigated in future works.This paper also identified performance measuring metrics,including accuracy,precision,recall,and f-measure,widely used in the literature.

Observation Of an English Class

EAP class offers opportunities to international students doing various courses at both undergraduate and postgraduate levels. The EAP course could not only enhance the communication skills of the international students, but also improve their knowledge of English grammar, vocabulary, spelling, sentence structure and composition skills. The purpose of this paper is to analyze the useful teaching method teacher used in class, and help different students improving their English skills.

Phenotypic Characterization and Strategies for Genetic Improvement of WAD Goats under Backyard Systems

West African Dwarf (WAD) goats represent one of the predominant small ruminant breeds raised by resource-limited households in southern Nigeria as well as in the humid west and central Africa. This breed of goats is renowned for its adaptation to hot and humid environments, high fertility and prolificacy under backyard systems where they are raised almost with zero investment. On account of its contributions to household income and food security in southern Nigeria, there is the need for a detailed phenotypic and genetic characterization as well as the design of breeding strategies for its conservation through sustainable utilization. A critical challenge, however, is that there are no national breeding policies in most of the countries where WAD goats are raised. The objectives of this paper are: to review literature reports on trait-level information and estimates of genetic parameters for some economic characters of WAD goats;and to discuss a communal breeding scheme for its conservation through sustainable utilization. The presentation shows that WAD goats represent a highly diverse population, with particular reference to qualitative and performance-related traits, reflecting the role of traditional institutions in the maintenance of animal diversity in local populations. A genetic improvement programme involving dispersed open nucleus breeding scheme was discussed. The scheme involves backyard WAD goat units in villages as base population and dispersed communally managed schemes that maintain a population of bucks only, as nucleus units. Critical issues such as the definition of breeding goals by farmers, as well as communal project ownership, are emphasized. The ultimate goal of the breeding programme is to create opportunities for community-based management of WAD goat genetic resources for the benefit of backyard goat farmers in the region.

提质培优视域下推动高职教育课堂革命的路径研究

课堂革命秉持“以学生为中心”的理念提出了教师、教学内容、教学方法与评价方式的要求,围绕学生的全人发展和可持续发展进行改革,将学生从被动的状态激活起来。高职院校需要通过提升教师能力做好“课堂革命”人力保障、整合教学内容跟进“课堂革命”内容、创新课堂教学落实“课堂革命”、多元教学评价绘制课堂学习曲线的举措来推动课堂革命的最终实现,让学习真正发生。

长江经济带生态文明建设水平变化特征与影响因素分析

长江经济带生态文明建设水平的高低关系到长江流域绿色协调发展能力,深刻影响我国生态安全格局。从生态经济、生态环境、生态社会3个层面构建评价指标体系,使用改进TOPSIS方法模型测算长江经济带生态文明建设水平,利用地理加权回归模型(GWR)分析其影响因子。研究结果表明:(1)在2011—2020年,长江经济带生态文明建设水平整体上呈上升趋势,由东向西沿轴线逐步扩散。(2)各子系统建设水平异质性特征显著,生态经济建设水平东部高于西部,以长江下游地区和省会城市为核心向周围辐射发展;生态环境水平在各省会及其周边城市增长较快,而工业发展型城市有不同程度的降低。生态社会水平高值区集中分布在江浙沪地区,低值区分散分布于中上游各省会城市。(3)地形、常住人口城镇化水平、第三产业占比、恩格尔系数、科技财政支出占比均正向影响了研究区生态文明建设水平,每万人在校大学生数对生态文明建设水平呈弱负相关。

提质培优背景下PBL教学法应用研究——以商务英语谈判开局为例

提质培优背景下,在“国际商务谈判”双语课堂中增值赋能,实施“三教”改革、深挖“思政元素”、创新课程体系、增强学生文化自信、培养学生工匠职业素养,以实现新时代英语人才的全面发展,在应用型高校发展和建设中十分必要。利用PBL教学法,探索以项目为载体,构建以学生学习为中心、企业和教师共同参与的实践性课堂,实现提质培优新阶段的人才培养目标。

构建“四个融合”助推一流本科课程建设——以硅酸盐水泥热工设备课程为例

依据一流本科课程“两性一度”的建设标准,对无机非金属材料专业硅酸盐水泥热工设备一流本科课程建设过程进行了介绍,构建了专业知识点与思政元素有机融合、教学内容深度与广度相融合、现代信息技术与教学深度相融合、多维度考核机制相融合的四种教学模式。将融思政元素融入课堂教学内容之中,强化立德树人思想,通过建设智慧课堂,让课堂“动起来”。硅酸盐水泥热工设备一流本科课程建设对于强化学生正确世界观、培养学生高级思维能力、解决复杂问题的综合能力、勇于创新能力和个性化探究学习能力起到了重要的推动作用。

基于“双一流”建设高校学生培养目标的实验室共管机制完善

“双一流”高校建设体系中,人才培养和实验室建设作为关键要素举足轻重,分析二者一致性和互补性,结合传统的“共管”理念,构建基于“双一流”建设高校学生培养目标的实验室师生共管机制,在提升实验室建设和管理水平的同时,有效实现学生培养目标,营造良好的实验环境和创新氛围,克服以往简单共管模式,为“双一流”高校建设和学生总体能力培养提供保证。文章分析了“共管”的基本理念、经验与可行性;明确了需要解决和面对的问题,提出具体应对策略;进行了共管机制的工作分工,对工作的有序推进提出了建议;对高校实验室共管机制中“双一流”建设高校学生培养目标的达成进行了说明。从理论体系到实践环节,完整地阐述了高校实验室深入共管机制的实施关键,对于高校实验室建设、人才培养“、双一流”建设和高校人事制度改革具有积极的参考价值。

混合式教学模式下提升验证性实验“两性一度”的探索与实践

以地层油高压物性测定实验为例,开发数字化教学资源、建设网上虚拟课堂。利用线上线下混合式教学突破实验教学时间和空间的限制,拓展实验内容,涵盖了地层油取样、配样、转样、测试及分析等全过程的系统知识,并紧跟石油工程领域前沿研究热点引入部分CO_(2)驱油和封存机理研究内容,将原验证性实验改进为探究性实验。构建以学生为主体的翻转实验教学模式,在课前、课中及课后多个环节实施“教师+学生”“过程+成果”“常规+拔高”相结合的多元成绩评价机制。这些举措有效地解决了传统实验教学中存在的一些不足,提升了验证性实验的“两性一度”,提高了石油工程实验课程的含金量。

腰椎融合术后患者急性疼痛发展轨迹及影响因素

目的探讨开放性腰椎融合术患者急性术后疼痛轨迹的潜在类别,分析不同潜在类别的影响因素,为不同类别患者制定针对性镇痛措施提供依据。方法使用便利抽样法,选取择期开放性腰椎融合术患者251例,在术前1 d收集患者一般资料、疼痛评分及睡眠质量资料。术后分别于全麻清醒并拔除气管导管的0 h、6 h、12 h、1 d、2 d、3 d、4 d、5 d、6 d 9个时间点评估患者疼痛程度。采用潜类别增长模型识别急性术后疼痛轨迹的潜在类别,采用无序多分类logistic回归分析急性术后疼痛轨迹潜在类别的影响因素。结果识别出3种急性术后疼痛轨迹,分别为疼痛加剧后缓解组(83例,33.0%),疼痛加剧稳定后反弹组(30例,12.0%),轻度疼痛组(138例,55.0%)。回归分析显示,相对于轻度疼痛组,病程≥10年、高中以下文化程度、手术时间>240 min的患者更容易进入疼痛加剧稳定后反弹组;年龄≤50岁、存在睡眠障碍、术后未使用镇痛泵的患者更容易进入疼痛加剧后缓解组(均P<0.05)。结论开放性腰椎融合手术患者急性术后疼痛呈现不同的发展轨迹,医护人员应根据不同发展轨迹重视年龄≤50岁、病程≥10年、高中以下文化程度、术前有睡眠障碍、手术时间>240 min、术后未使用镇痛泵的患者,给予及时的疼痛评估及针对性干预措施,改善患者术后疼痛程度。

教学学术水平和人才培养质量提升的探索与实践

为了加强教师的教学学术素养,学院依托学校的教师教学发展中心,以师资培训、教学咨询、经验交流和技术支持等“四大功能”作为驱动,通过建设一流课程、搭建一流平台和打造一流课堂,构建了覆盖本科生培养全过程的“理论认知、实践求证、科创实训、项目实战”多方协同育人机制,破解科教融合、理实融合不足和错位等困境,有效实现了教师教学学术水平和本科人才培养质量的全面提升.