Research on Professional Teaching Reform of the E-Commerce Major in Vocational Colleges Under the Internet Era

With the rapid development of science and technology,the face of human society has undergone great changes;with the emergence of the Internet era,all kinds of educational technology,equipment,and software in vocational colleges have been widely used to carry out education and teaching,and has achieved remarkable results.Based on this,colleges and universities’electronic commerce(e-commerce)professional teachers should try to rely on the Internet to build information teaching classrooms,introduce advanced methods to build efficient classrooms by integrating teaching resources,and optimize the top-level design,so as to activate the classroom atmosphere,mobilize students’emotions,make them immersed in the teaching of electronic commerce courses.In view of this,this paper combines the existing theory and experience,first analyzes the dilemma faced by the current teaching of e-commerce in vocational colleges,then discusses the practical significance of teaching reform based on the Internet era,and lastly puts forward the specific practice path.

Impacts of agri-food e-commerce on traditional wholesale industry:Evidence from China

Rapidly expanding studies investigate the effects of e-commerce on company operations in the retail market.However,the interaction between agri-food e-commerce(AEC)and the traditional agri-food wholesale industry(AWI)has not received enough attention in the existing literature.Based on the provincial panel data from 2013 to 2020 in China,this paper examines the effect of AEC on AWI,comprising three dimensions:digitalization(DIGITAL),agrifood e-commerce infrastructure and supporting services(AECI),and agri-food e-commerce economy(AECE).First,AWI and AEC are measured using an entropy-based combination of indicators.The results indicate that for China as a whole,AWI has remained practically unchanged,whereas AEC exhibits a significant rising trend.Second,the findings of the fixed-effect regression reveal that DIGITAL and AECE tend to raise AWI,whereas AECI negatively affects AWI.Third,threshold regression results indicate that AECI tends to diminish AWI with three-stage inhibitory intensity,which manifests as a first increase and then a drop in the inhibition degree.These results suggest that with the introduction of e-commerce for agricultural product circulation,digital development will have catfish effects that tend to stimulate the vitality of the conventional wholesale industry and promote technical progress.Furthermore,the traditional wholesale industry benefits financially from e-commerce even while it diverts part of the traditional wholesale circulation for agricultural products.

Impact of BRICS Trade Facilitation on China's Exports Using Cross-Border E-Commerce

With the rapid growth of the global digital economy, cross-border e-commerce, as an emerging form of trade, has gradually become a powerful engine to promote the development of global trade. BRICS is an important force in the global economy, and the progress of the BRICS countries' trade facilitation level has an important impact on the global trade environment. This paper conducts an in-depth study of the dynamic changes in BRICS trade facilitation from 2013 to 2022, and uses an extended gravity model to analyze the specific impact of this change on China's exports using cross-border e-commerce. The results show that although the BRICS countries have made some progress in trade facilitation, the overall level still needs to be improved, and there are obvious differences among member countries. However, the improvement of trade facilitation among BRICS countries has undoubtedly brought significant positive effects to China's exports using cross-border e-commerce.

Research on Current Situation and Legal Regulation of Cosmetics Live Streaming E-commerce in China

Analyze the compatibility between cosmetics and live streaming e-commerce from its own nature,marketing means and supply chain characteristics.According to the prominent problems,sort out the relationship between all parties in the cosmetics live e-commerce industry chain.Combined with the latest regulatory policies of live streaming e-commerce and cosmetics,the responsibilities of different subjects in cosmetics live streaming e-commerce are summarized,and relevant suggestions and countermeasures are put forward for the standardization and development of live streaming e-commerce.Cosmetics brand owners are the first responsible persons for product quality.Anchors,as a mixed identity between intermediary,advertising spokesperson and operator,should bear stricter joint and several liability when recommending products related to consumers’health.If anchors fail to clearly identify themselves in the recommendation process,thus causing consumers to mistake them for the operator of the cosmetics,they should assume the obligations of the operator.

Analysis of the Current Situation, Influential Factors, and Countermeasures of Rural E-commerce Development

The development of rural e-commerce is becoming an important driver for the transformation of China’s rural economy,and with the rapid development of information technology and the upgrading of the agricultural industry,rural e-commerce is showing a vigorous momentum of development.Traditionally,agricultural products are mainly sold through traditional farmers’markets,which are subjected to geography and channel limitations,resulting in inefficient circulation of agricultural products.This paper analyzes the definition,the status quo,as well as the influencing factors of rural e-commerce development.On this basis,countermeasures for the advancement of rural e-commerce development are put forward.

“互联网+”远程指导康复对肩袖损伤ERAS理念下关节镜手术后患者的康复效果研究

目的探讨基于“互联网+”远程指导康复对肩袖损伤ERAS理念下关节镜手术后患者的康复效果。方法选择2021年1月至2022年6月本院收治的肩袖损伤ERAS理念下关节镜手术后患者227例,数字随机法随机分为对照组109例,观察组118例。对照组采取常规康复和随访,观察组采取基于“互联网+”的远程指导康复,持续3个月。比较两组患者手术前后的肩关节Constant Murley评分及生活质量。结果观察组Constant Murley评分及生活质量均高于对照组,差异均有统计学意义(P<0.05)。结论基于“互联网+”远程指导康复能够提升肩袖损伤ERAS理念下关节镜手术后患者的康复效果。

中国区域ERA5-ZTD/PWV精度评估与台风事件响应研究

再分析数据能够提供多种历史气象数据同化产品,为了评估欧洲中期天气预报中心的最新一代ERA5再分析数据集估计的天顶对流层延迟(Zenith Tropospheric Delay,ZTD)和大气可降水量(Precipitable Water Vapor,PWV)产品在中国区域的精度,利用2017—2019年中国区域内14个全球导航卫星系统地面监测站和89个探空站反演的ZTD和PWV数据分别对ERA5-ZTD和ERA5-PWV精度进行了评估。结果表明,除青藏地区的站点外,ERA5-ZTD的精度分布较为均匀,平均Bias、RMSE和STD分别为-6.3 mm、19.3 mm和17.5 mm;ERA5-PWV的精度分布呈现西部内陆高和东南沿海低的趋势,平均Bias、RMSE和STD分别为0.3 mm,2.9 mm和2.7 mm。此外,在研究2019年“利奇马”台风期间ZTD和PWV的时空分布中,提出了使用水汽到达时间差的方法定量估计台风的水汽移动速度。得到台风期间ZTD和PWV具有相同的空间分布规律,且移动方向与台风的移动路径方向是一致的,估计的水汽平均移动速度为12.4 km/h,与台风的平均移动速度16.1 km/h非常接近。因此,ERA5-ZTD/PWV在中国区域内具有较高的精度,ZTD和PWV可作为重要气象因子为台风的预警预报研究提供重要参考。

Orem理论联合ERAS护理在胸腔镜肺癌根治术中的应用研究

探讨以奥瑞姆(Orem )理论联合加速康复外科理念(ERAS)护理在胸外科应用胸腔镜肺癌根治术中的研究效果。方法 选取2020年12月~2022年6月接受我院胸外科胸腔镜肺叶切除术的 90 例患者为研究对象,随机分为二组各45例,对照组接受常规护理干预,实验组接受Orem理论联合ERAS护理贯穿于常规护理的全过程,在疾病的不同阶段选择不同的护理系统实施护理。结果 两组在术后患者首次下床活动时间、尿管拔出时间住院天数、胸管拔除时间、出院满意度方面均高于对照组(P<0.05) 。结论 Orem 理论联合ERAS护理在胸腔镜肺癌根治术可有效促进患者早期康复。

Spatial Structure of China's E-commerce Express Logistics Network Based on Space of Flows

The intermediate link compression characteristics of e-commerce express logistics ne tworks influence the tradition al mode of circulation of goods and economic organization,and alter the city spatial pattern.Based on the theory of space of flows,this study adopts China Smart Logistics Network relational data to build China's e-commerce express logistics network and explore its spatial structure characteristics through social network analysis(SNA),the PageRank technique,and geospatial methods.The results are as follows:the network density is 0.9270,which is close to 1;hence,indicating that e-commerce express logistics lines between Chinese cities are nearly complete and they form a typical network structure,thereby eliminating fragmented spaces.Moreover,the average minimum number of edges is 1.1375,which indicates that the network has a small world effect and thus has a high flow efficiency of logistics elements.A significant hierarchical diffusion effect was observed in dominant flows with the highest edge weights.A diamond-structured network was formed with Shanghai,Guangzhou,Chongqing,and Beijing as the four core nodes.Other node cities with a large logistics scale and importance in the network are mainly located in the 19 city agglomerations of China,revealing the fact that the development of city agglomerations is essential for promoting the separation of experience space and changing the urban spatial pattern.This study enriches the theory of urban networks,reveals the flow laws of modern logistics elements,and encourages coordinated development of urban logistics.

基于ERAS理念的多学科协作对Stanford A型主动脉夹层患者I期心脏康复的应用效果研究

目的探讨基于加速康复外科(ERAS)理念的多学科协作对Stanford A型主动脉夹层患者心脏康复的应用效果研究。方法选取河南省胸科医院在2021年1月至2022年11月期间收治的80例Stanford A型主动脉夹层患者,随机分为对照组及观察组,各40例。观察组采用基于ERAS理念的多学科协作护理,对照组予以常规护理。比较两组患者围手术期指标、心功能、心理状况、疼痛评分以及生活质量水平。结果观察组的气管插管时间、ICU停留时间、术后住院时间、下床活动时间短于对照组,差异有统计学意义(P<0.05)。护理前,两组患者的心功能水平比较,差异无统计学意义(P>0.05);护理后,两组患者心功能水平均优于护理前,且观察组心功能优于对照组,差异有统计学意义(P<0.05)。护理前,两组心理状态与疼痛程度比较,差异无统计学意义(P>0.05);护理后,两组患者心理状态及疼痛程度均有所改善,且观察组改善程度优于对照组,差异有统计学意义(P<0.05)。护理前,两组生活质量评分比较,差异无统计学意义(P>0.05);护理后,两组患者生活质量水平均升高,且观察组高于对照组,差异有统计学意义(P<0.05)。结论基于ERAS理念的多学科协作方案可改善Stanford A型主动脉夹层手术患者心功能,缓解患者不良情绪及疼痛程度,提高患者生活质量,缩短住院时间,可促进患者术后恢复。

ERAS理念下的舒适护理对患者术后麻醉苏醒质量躁动情况及疼痛程度的影响

目的 探讨加速康复外科(ERAS)理念下的舒适护理对全身麻醉患者术后麻醉苏醒质量、躁动情况及疼痛程度的影响。方法 将136例全身麻醉手术患者按照随机数字表法分为对照组和研究组,每组68例。对照组患者给予常规麻醉恢复室(PACU)护理,研究组患者在对照组基础上给予ERAS理念下的舒适护理。比较两组患者麻醉苏醒质量(包括导管拔除时间、自主呼吸时间和PACU停留时间)、躁动情况、疼痛程度[采用舒适度行为量表(CBS)和疼痛视觉模拟评分法(VAS)评定]及并发症发生情况。结果 研究组患者术后导管拔除时间、自主呼吸时间早于对照组,PACU停留时间短于对照组(P<0.01)。研究组患者术后躁动率、并发症总发生率、VAS评分低于对照组,CBS评分高于对照组(P<0.05或0.01)。结论 ERAS理念下的舒适护理可改善全麻患者术后麻醉苏醒质量和躁动情况,减轻患者疼痛程度,值得临床推广。

基于多套卫星资料的ERA5全球小时降水频率评估

最近发布的新一代全球再分析资料集ERA5,提供了全球小时降水再分析值,为全球小时降水研究提供又一个数据参考。然而,目前针对ERA5小时降水频率的评估工作还较为有限。本研究采用多套全球卫星观测小时降水对ERA5小时降水的频率进行了评估。对比分析发现:尽管ERA5总降水量与卫星资料出现较好的一致性,但ERA5的小时降水频率约为卫星资料的2~3倍,呈现系统性偏高。进一步分析表明,这主要是由于ERA5大大高估了中、低强度降水事件的数量。其中,ERA5对弱降水频率的高估尤为明显,平均可达卫星降水频率的6倍;此外,ERA5对海洋降水频率的高估程度也大于陆地。ERA5小时降水频率的系统性高估问题对相关研究的潜在影响,尚在进一步评估中。

新疆地区ERA5和MERRA-2大气可降水量精度分析

大气再分析资料提供的大气可降水量(PWV)产品在天气变化和气候研究中扮演着极为重要的角色。新疆地区存在地形起伏大、气候复杂和实测高分辨率PWV产品缺乏等特点,大气再分析资料提供的PWV产品可作为有力补充。以新疆地区2018年11个GNSS站数据反演得到的PWV(GNSS-PWV)信息作为参考值,评估ERA5和MERRA-2提供PWV产品在新疆地区的精度,并分析两种再分析资料PWV的偏差(Bias)和均方根差(RMSE)的时空变化特性及其日变化。结果表明:以GNSS-PWV为参考值,ERA5和MERRA-2在新疆地区的PWV年均Bias分别为-0.97和-1.20 mm,年均RMSE分别为1.81和2.11 mm,两种再分析资料PWV均具有较高精度,其中ERA5 PWV精度略高于MERRA-2 PWV;两种再分析资料的PWV精度都有明显的季节性变化,总体表现为夏季精度低,冬季精度高;在PWV日变化分布上,两种再分析资料与GNSS-PWV展现出较高的一致性,能较好地反映新疆地区PWV的日变化特性。

Technology and Infrastructure Considerations for E-Commerce in Chinese Agriculture

Information technology （IT） was one of the most intensively studied and extensively applied technologies in the 20th century and its research and application will be even more accelerated in the 21st century. The impact of IT is more farreaching than any one may have had imagined, encompassing all facets and sectors of society. Economically, e-commerce generated more than $1.5 trillion in the US in 2004 and is projected to be 30, 15 and 2.6% of the total manufacturing, whole sales and retail sales in the US in 2006 respectively. IT research in agriculture has so far been particularly applied to such fields as precision farming and bioinformatics and in extension and farming practices. As such, its potential application in agricultural e-commerce has only begun to be explored. The United States Department of Agriculture has identified four different functions that e-commerce firms perform in the agricultural sector. They are： （1） information distribution, （2） input supply, （3） commodity trading floor, and （4） logistics/supply chain management. Unlike other industrial products, agricultural products are much more diverse and difficult to process and handle. For instance, fruits and vegetables are perishable and have to reach the market and the hands of consumers within a short period of time. One of the problems for IT applications in agriculture is the lack of standard measures in characteristics and quality of perishable produce and processing foods. Standards are pre-requisites for effective IT application and e-commerce. According to the Global Commerce Initiative, standards bring scalability, portability and affordability to the business process. Standards speed up the supply chain and reduce errors and protect technology investments and ensure system to system interaction and interoperability. Because the complexity of issues involved in standardization, the process of standardization must involve the input and discussion from all segments of the society. Being the largest agricultural country in the world and one of the most active trading partners in the international market, China must also be involved in determining the standards for both domestic and international trades. These measures are the necessary foundations for e-commerce in agriculture. In this paper, we provide a review of the technological development of standardization and coding that are prerequisites for IT application in e-commerce. This understanding is important for professionals in China to promote e- commerce in agriculture. Finally, we propose that a national committee to be formed in China, which includes IT experts from private sectors, academic professionals and governmental officials. This committee should consider the progress being made elsewhere in the world, the unique properties of Chinese commodities and appropriate business models to determine a set of standard measures that are transportable and communicable digitally in the world market for China＇s e- commerce in agriculture.

Transaction Frequency Based Trust for E-Commerce

Most traditional trust computing models in E-commerce do not take the transaction frequency among participating entities into consideration,which makes it easy for one party of the transaction to obtain a high trust value in a short time,and brings many disadvantages,uncertainties and even attacks.To solve this problem,a transaction frequency based trust is proposed in this study.The proposed method is composed of two parts.The first part is built on the classic Bayes analysis based trust modelswhich are ease of computing for the E-commerce system.The second part is the transaction frequency module which can mitigate the potential insecurity caused by one participating entity gaining trust in a short time.Simulations show that the proposed method can effectively mitigate the self-promoting attacks so as to maintain the function of E-commerce system.

ERA5和ERA5-Land地面风速资料在中国陆地区域的适用性对比初步研究

利用全国40个地面台站的观测资料对ERA5及ERA5-Land两种不同空间分辨率的再分析资料开展了地面风速误差评估研究,结果表明:ERA5和ERA5-Land资料多年平均风速偏差的平均值分别为0.08 m s^(−1)、-0.06 m s^(−1),偏差的最大值分别为0.46 m s^(−1)、-0.19 m s^(−1),相对偏差的平均值为4.4%、-2.0%,相对偏差的最大值分别为33.0%、-10.1%;月平均风速线性拟合方程的斜率分别为0.93、0.97,截距分别为0.29 m s^(−1)、0.02 m s^(−1),相关系数分别为0.98、0.99;月平均风速均方根误差的平均值分别为0.17 m s^(−1)、0.14 m s^(−1),均方根误差的最大值分别为0.49 m s^(−1)、0.22 m s^(−1),相对均方根误差的平均值为7.4%、5.7%,相对均方根误差的最大值分别为35.2%、13.3%。ERA5-Land高分辨率资料地面风速误差相对较低,有利于提高风能资源评估的准确性。

Enhanced E-commerce Fraud Prediction Based on a Convolutional Neural Network Model

The rapidly escalating sophistication of e-commerce fraud in recent years has led to an increasing reliance on fraud detection methods based on machine learning.However,fraud detection methods based on conventional machine learning approaches suffer from several problems,including an excessively high number of network parameters,which decreases the efficiency and increases the difficulty of training the network,while simultaneously leading to network overfitting.In addition,the sparsity of positive fraud incidents relative to the overwhelming proportion of negative incidents leads to detection failures in trained networks.The present work addresses these issues by proposing a convolutional neural network(CNN)framework for detecting ecommerce fraud,where network training is conducted using historical market transaction data.The number of network parameters reduces via the local perception field and weight sharing inherent in the CNN framework.In addition,this deep learning framework enables the use of an algorithmiclevel approach to address dataset imbalance by focusing the CNN model on minority data classes.The proposed CNN model is trained and tested using a large public e-commerce service dataset from 2018,and the test results demonstrate that the model provides higher fraud prediction accuracy than existing state-of-the-art methods.

采用ERA5数据构建基于人工神经网络的天津ZWD模型

提出一种高精度的ZWD模型(tianjin_zwd,TZ)。TZ基于2016-2018年逐小时气压分层的ERA5,欧洲中尺度气象预报中心第五代再分析产品数据,采用BP神经网络建立。然后,根据2019年的ERA5产品导出的ZWD对TZ模型进行了验证。结果表明:相比GPT3模型,TZ模型可提供更贴近真值的ZWD估值;并且,其RMSE由5.0 cm (GPT3)降至4.5 cm,表明10%的精度提升。上述结果表明TZ模型实现了更优的预测性能,该模型的构建策略可为全国其他地区的ZWD建模提供借鉴。

An Enhanced Intelligent Intrusion Detection System to Secure E-Commerce Communication Systems

Information and communication technologies are spreading rapidly due to their fast proliferation in many fields.The number of Internet users has led to a spike in cyber-attack incidents.E-commerce applications,such as online banking,marketing,trading,and other online businesses,play an integral role in our lives.Network Intrusion Detection System(NIDS)is essential to protect the network from unauthorized access and against other cyber-attacks.The existing NIDS systems are based on the Backward Oracle Matching(BOM)algorithm,which minimizes the false alarm rate and causes of high packet drop ratio.This paper discussed the existing NIDS systems and different used pattern-matching techniques regarding their weaknesses and limitations.To address the existing system issues,this paper proposes an enhanced version of the BOM algorithm by using multiple pattern-matching methods for the NIDS system to improve the network performance.The proposed solution is tested in simulation with existing solutions using the Snort and NSL-KDD datasets.The experimental results indicated that the proposed solution performed better than the existing solutions and achieved a 5.17%detection rate and a 0.22%lower false alarm rate than the existing solution.

基于ERAS的腹壁下深血管穿支皮瓣乳房重建术麻醉管理进展

目前,手术后快速康复(enhanced recovery after surgery,ERAS)策略在腹壁下深血管穿支(deep inferior epigastric perforator,DIEP)皮瓣乳房重建术中的开展在全球尚处于起步和探索阶段,缺乏共识性的指导原则。在涉及多学科的ERAS策略中,麻醉科承担了麻醉方案优化制订、围术期液体管理及内环境稳态调控、预防低体温、完善围术期镇痛、预防术后恶心呕吐等要素工作。本文将复旦大学附属肿瘤医院麻醉科在DIEP皮瓣乳房重建术的ERAS策略中的麻醉方案进行归纳、总结,并结合国内外最新研究进展进行综述,以期建立和完善基于ERAS的该类手术的围术期策略。