专业集群建设视角下发酵工程课程建设的探索与实践

发酵工程课程作为喀什大学生命与地理科学学院专业集群的建设课程,不仅是生物技术专业的核心课程,也是食品科学与工程专业的重点课程,实践性和应用性较强。本文基于学院的专业现状,根据专业特色对课程内容进行调整和优化,改革教学方法和课程考核体系。结果表明,优化课程内容,更贴近专业发展;改进教学方法,理论课教学采用线上和线下相结合的模式,实践课由课堂实验逐渐向企业靠拢,有利于学生的就业导向;改革课程考核方式,对课程重新定位,客观评价了学生的综合素质。     

Auction markets for specialty food products with geographical indications

We present a first analysis of online auction markets for specialty food products. We identify auction prices, trade volume, and value for domestic and foreign-origin specialty ham with geographical indications (GIs) that were sold in online auctions in Germany within a 1-month period. Applying hedonic modeling, we examine potential factors that may influence online bidding behavior and final auction prices. We estimate positive auction price effects for weight, bidding activity, and auction length, that the domestic product is sold at a discount, that higher shipping costs have a negative impact on final prices, and that auctions ending on Fridays and Saturdays yield lower prices. The model may be used to estimate the value of GIs. In our example, we estimate relative price differences of 20–30% for the GIs of three specialty hams (Prosciutto di Parma, Jamón Serrano, and Schwarzwälder Schinken).     

Comparisons of the Educational Value of Distance Delivered versus Traditional Classroom Instruction in Introductory Agricultural Economics

As many universities are promoting distance courses, the comparative advantages and disadvantages over conventional classroom delivery are being debated. Student attitudes and test performance in an introductory microeconomics course are compared across the two different course delivery formats. Results show that students with average or below-average college aptitude test scores perform more poorly in the distance class.     

Online Survey Data Quality and Its Implication for Willingness‐to‐Pay: A Cross‐Country Comparison

Using online surveys to elicit consumer preference is gaining popularity because of several advantages offered by this method. Past research mainly focuses on the comparison between online surveys and other survey modes. Few have explored methods of using online survey tools to improve data quality for consumer willingness‐to‐pay (WTP) estimates. This article determines the impact of using a validation question (VQ) approach that asked survey respondents to select a particular answer on improving online survey data quality across six countries. Results show that survey data quality is a common problem in online surveys across countries and the severity of this problem differs significantly. Using VQs might detect the respondents who are less careful in answering survey questions, thus providing less reliable answers. The econometric models for respondents who correctly answer VQs (pass VQs) perform significantly better than the models for respondents who incorrectly answer VQs (fail VQs). The WTP estimates for respondents who pass and fail VQs differ significantly; and in general the WTP estimates for respondents passing VQs have smaller variances than those for all respondents and for respondents failing VQs.     

农村贫困大学生就业难与高校勤工助学管理制度改革

本文分析了勤工助学活动与解决农村贫困大学生就业难的内在联系，并以笔者所在学校为例，分析勤工助学管理面临的主要困难及原因，讨论了如何以提升贫困大学生就业能力为导向来统筹勤工助学管理制度改革，最后提出了相应建议。     

An overview of laboratory research on conservation auctions

This paper reviews the laboratory research on conservation auctions by first suggesting a framework for organizing the literature; then by highlighting the key insights and contributions achieved to date; and thirdly by taking stock of pending questions and unresolved problems. The review framework focuses on the performance of conservation auctions and distinguishes between causal factors and resulting effects. Causal factors include auction format, implementation rules and bidder characteristics, as well as some other aspects. Resulting effects distinguish between intermediate effects, mainly in terms of bidder behaviour, and final auction performance. Rather than a standard literature review, this ‘overview’ also tries to capture the work that is currently going on and that has not yet been published.     

2部制水价应用研究

简介2部制水价的含义与模型，提出确定水利工程供水的2部制价格所依据的原则：可行性原则，促进水资源可持续发展原则，灵活性原则，全面性原则和可操作性原则。由于一个地区的水市场是一种垄断市场，需水方分为城市生活用水、工业用水和农业用水3方，各方的需求价格弹性不同。因此，可以实行价格歧视，对不同的市场收取不同的水费。在2部制水价模型的基础上，根据水商品的特性，利用价格歧视理论，提出了农业用水、工业用水和城市用水的差别定价理论并以河北省陡河水库为例进行实证分析。     

基于智慧课堂混合式教学在应用微生物技术中的应用探究

结合应用微生物技术课程的特点,利用智慧课堂平台进行线上线下混合式教学,相比传统课堂更能够满足学生不同的需求,增强学生的参与感,提高学生的学习兴趣.同时还能实现分层次教学,引导学生进行深度学习,达到提高教学质量的目的.本文以"认识病毒"一节为例,探究了混合式教学的具体实施及教学效果.课后测试显示,混合式教学可有效帮助学生...     

The impact of customer ratings on consumer choice of fresh produce: A stated preference experiment approach

The importance of customer ratings or reviews in online shopping has been recognized in the previous literature; however, few have studied how online customer rating scores affect consumers’ fresh produce purchases and its importance relative to other fresh produce attributes. The quality of fresh produce demonstrates high uncertainty and variation; therefore, the impact of user-generated content such as customer rating scores on the choice of fresh produce may be more complex than on other product categories. Moreover, previous studies on customer ratings have not examined the price premium that retailers can obtain based on better ratings of fresh produce. Using a stated preference approach (i.e., choice experiment), this study measures the willingness to pay for a higher customer rating score and explores its relative importance to other popular fresh produce attributes (i.e., organic, place of origin, and shelf life). The results show that customer rating is the second most important attribute after the place of origin and is more important than production methods (e.g., organic and naturally grown) for fresh strawberry purchases. Also, rating scores demonstrate a diminishing marginal impact on consumer willingness to pay. Younger consumers and households with children are willing to pay more for fresh produce with high ratings than those with low ratings.     

超星学习通辅助食品分析课程思政教学初探

基于食品分析课程特点,采用学习通的在线辅助功能进行课程思政教学初探。通过挖掘各章节中的主要思政元素并与专业知识无缝衔接,利用超星学习通课前发送“学习资料+相关知名故事”,课中进行主要知识点融入思政元素的案例设计,课后进行讨论并统计学情,从而提高学生学习兴趣和主动探索分析的能力,有利于增强食品人才的专业知识、职业素养和工匠精神。     

Expansion Opportunity at Triple F Farms: A Case Study

Many farms and ranches consider the decision to expand as one way to remain competitive in today's marketplace. Triple F Farms is contemplating the decision to expand by buying the land and machinery of the owner/manager's retiring father. Students and outreach audiences are led through the analysis and decision-making process to evaluate the differences in farm size and financial goals and to evaluate how those goals affect the producer's expansion decision.     

基于GIS的农用地分等研究--以福州市琅岐经济区为例

目前农用地分等尚处于研究阶段;以琅岐经济区为例,根据农用地分等的依据和原则,利用GIS技术开展农用地质量分等研究,概述了农用地分等技术路线、评价单元的划分、分等参数的计算和成果图的输出等几项关键步骤。     

浙江省林地市场构建的对策探讨

林地市场应属于特殊的要素市场,在我国当前尚属正在形成之中,浙江省却走在了全国的前列。本文主要就浙江省林地市场的现况,探讨浙江省林地市场构建的对策问题。     

Integrating neighbourhood effects in the calculation of optimal final tree diameters

Modern silvicultural treatments are based on single trees whereas classic forest economics look at the stand level. To accompany each other it is necessary to transfer the established economic models to the single tree level. This paper is an approach to use the Faustmann model and the corresponding marginal rate of return (Pressler percent) to derive value increment rates of single trees taking into account neighbourhood effects due to competition between individual trees. Furthermore, optimal rotation periods and optimal final diameters for future trees will be calculated.     

试论非公有制林业的产权基础

在非公有制发展的政策和法制大背景下,结合中国的国情和林业的特殊性,以现代产权理论的分析介绍为基础,深入探讨了非公有制林业发展的产权制度构筑问题,论述了林地使用权是其产权基础,并从产权上构筑了非公有制林业发展的框架。     

Optimal Feed Mill Blending

Commercial feed blending is a complex process consisting of many potential raw ingredients and final products. The sheer number of daily orders and final products at a typical feed mill means that raw ingredients cannot be mixed to directly produce final products in an economical fashion. As a result, the intermediate production of pellets with prespecified nutritional content is a necessity that makes the feed blending problem highly nonlinear. We discuss a nonlinear approach to feed blending and compare results from an empirical application to those from a sequential linear programming approach common to most feed mills.     

Time Allocation Decisions Associated with Job Market Preparation: Undergraduate Perceptions versus Market Realities

A survey of agribusiness firms identifies characteristics associated with above average starting salary offers in the allied fields of agribusiness, agricultural economics, business, and economics. A complementary survey is made of students at Texas A&M University and University of Georgia. Results show that firms value work experience and leadership experience more than students do, whereas students value raising grade point average and interview preparation more than do firms. Students seeking a firm's maximum starting salary offer will need to enhance academic performance with substantial work experience and leadership experience.     

胶济铁路沿线产业带及其对山东省区域发展的影响

山东省胶济铁路沿线产业带是目前省内经济最发达、产业高度密集的核心地带,其区域背景优越。该产业带从1840年到目前经历了低水平均衡性空间结构的雏形期、多核心空间结构的发展期、带状点轴空间结构的成熟期,带来了山东省区域发展的南北差异、东西梯度差异和圈层结构。认为在发展战略上可采取轴线带动开发和圈层中心带动的模式,在此基础上达到整个区域发展的均衡网络阶段。     

E-commerce and supply chain resilience during COVID-19: Evidence from agricultural input e-stores in China

COVID-19 has caused major disruptions to agricultural supply chains around the world. Researchers and policy-makers are interested in identifying means to reduce the disruptive effects caused by the pandemic. We investigate the impacts of COVID-19 on the operation of e-commerce stores (in short, e-stores) specialising in agricultural inputs. The difference-in-differences method (DID) is employed to estimate the causal relationship between COVID-19 and online sales of agricultural inputs using data from 54,244 agricultural input e-stores registered in 118 prefecture-level cities across 15 provinces and hosted on two major Chinese e-commerce platforms. The results show that COVID-19 led to a substantial growth in monthly sales of agricultural input e-stores, and this growth of online sales varied across store scales and by types of agricultural inputs. In particular, e-stores selling seeds and seedlings experienced a larger growth in sales than stores selling agricultural machinery and implements, and the mid- and larger-scaled e-stores experienced more growth of sales than micro- and small-scaled e-stores. Further analysis reveals that the growth of online sales of agricultural inputs was driven mainly by an increase in the quantity of customer orders (QCO). The findings of this paper underscore the importance of e-commerce in ensuring the resilience of the agricultural supply chain during the pandemic period.     

An Economic Simulation Game with Fast Feedback for a Lay Audience: An Example of Seasonal Cash Marketing Strategies

This paper highlights the use and implementation of a simulation game that can be presented at producer extension meetings or in the classroom with minimal time investment to participants and game coordinators. Immediate feedback and participant involvement are key factors that may make this type of simulation more interesting than conventional methods of conveying economic information to lay audiences.