β-Phellandrene: kairomone for pine engraver,Ips pini (Say) (Coleoptera: Scolytidae)

The responses ofIps pini (Scolytidae) to multiple-funnel traps baited with the pheromone, ipsdienol, and various monoterpenes were determined in stands of lodgepole pine in southern and central British Columbia.Ips pini was attracted to both ipsdienol and -phellandrene, demonstrating that -phellandrene is a kairomone for this species.Lasconotus complex (Colydiidae) and aCorticeus sp. (Tenebrionidae) were attracted to both ipsdienol and -phellandrene. TheCorticeus sp. exhibited a synergistic response to the combination of ipsdienol and -phellandrene; the responses of the other two species to the combination were additive. The predators,Thanasimus undatulus, Enoclerus sphegeus, andE. lecontei (Cleridae), were attracted to ipsdienol-baited traps, whileMonochamus clamator (Cerambycidae) andDendroctonus ponderosae (Scolytidae) were attracted to -phellandrene. Attraction of all eight species increased with increasing release rates of ipsdienol and/or -phellandrene.     

疫情下应用型高校程序竞赛培训的混合多元式教学改革

在新型冠状病毒爆发期间,为了响应教育部“停课不停学”要求,保障疫情防控期间的教学工作正常进行,针对疫情前期在线教学中存在的问题,提出混合多元式教学模式。该模式充分考虑了应用型人才培养要求以及程序竞赛培训特点,将流行的慕课教学、翻转课堂和在线判题系统进行结合,构建了完善立体的混合多元式程序竞赛在线教学体系。最终,通过该模式顺利地完成疫情期间程序竞赛的在线教学任务,并使学生在竞赛中获得优异成绩。     

网络空间安全实训设计

为保障网络空间安全,需要加强网络空间安全人才队伍建设,实训是把学生培养成为高素质复合型人才的重要手段。通过分析我国网络空间安全人才队伍建设现状,构建实训课程体系和实训平台,设计实训大纲和实训竞赛平台,形成了校企合作、教学与竞赛相结合的实训体系。实践证明,此网络空间安全实训设计能有效提高学生的网络空间安全技术能力,具有一定的推广价值,为高校培养应用型、复合型人才提供了新思路。     

国际油价下行:基于经济学模型的诠释

自2014年6月中旬以来,国际油价开始步入下行通道,油价一路暴跌,引发了国际媒体的极大关注。运用经济学理论及经济模型,诠释国际油价下跌的原因及趋势。     

浅谈女子水球项目左利手运动员的训练与比赛

通过文献资料法、专家访谈等方法,文章以女子水球项目左利手水球运动员训练和比赛的若干问题为研究对象,对影响左利手水球运动员技、战术训练、比赛的影响因素进行分析,从而为水球教练员、运动员的训练和比赛提供科学的理论依据和理论指导。     

校企合作与学科竞赛之我见

随着高等教育不断发展,高校与企业的深度合作也日益迫切。本文以南京工程学院历年与日本三菱电机有限公司每年举办的"三菱电机自动化杯"全国大学生自动化系统应用竞赛为例,以学科竞赛这块试验田对校企合作中对接文化进行了探索。在教学过程与职业标准、生产过程对接、形成优良学风、提升教师能力、提高学生就业层次等方面具有重要作用。     

汽车产业集群供应链种群生态系统的模拟与仿真

近年来中国汽车产业集群供应链体系发展日趋完善,反映出一定的类生物自调节性质,有必要从种群生态学角度对此展开研究。拟借鉴捕食者-食饵(寄主—寄生)理论,以Volterra模型为基础构建了三企业种群模型,仿真结果显示数值解图呈周期性变化,整个集群供应链体系趋于稳定发展。加强政府引导,合理分配资源及空间,在有效避免集群供应商恶性竞争的同时,可以推进集群供应链的整体稳定发展。     

Effects of Al:Si and (Al + Na):Si ratios on the properties of the international simple glass,part II: Structure

High-alumina containing high-level waste (HLW) will be vitrified at the Waste Treatment Plant at the Hanford Site. The resulting glasses, high in alumina, will have distinct composition-structure-property (C-S-P) relationships compared to previously studied HLW glasses. These C-S-P relationships determine the processability and product durability of glasses and therefore must be understood. The main purpose of this study is to understand the detailed structural changes caused by Al:Si and (Al + Na):Si substitutions in a simplified nuclear waste model glass (ISG, international simple glass) by combining experimental structural characterizations and molecular dynamics (MD) simulations. The structures of these two series of glasses were characterized by neutron total scattering and ²⁷Al, ²³Na, ²⁹Si, and ¹¹B solid-state nuclear magnetic resonance (NMR) spectroscopy. Additionally, MD simulations were used to generate atomistic structural models of the borosilicate glasses and simulation results were validated by the experimental structural data. Short-range (eg, bond distance, coordination number, etc) and medium-range (eg, oxygen speciation, network connectivity, polyhedral linkages) structural features of the borosilicate glasses were systematically investigated as a function of the degree of substitution. The results show that bond distance and coordination number of the cation-oxygen pairs are relatively insensitive to Al:Si and (Al + Na):Si substitutions with the exception of the B-O pair. Additionally, the Al:Si substitution results in an increase in tri-bridging oxygen species, whereas (Al + Na):Si substitution creates nonbridging oxygen species. Charge compensator preferences were found for Si-[NBO] (Na⁺), ^[3]B-[NBO] (Na⁺), ^[4]B (mostly Ca²⁺), ^[4]Al (nearly equally split Na⁺ and Ca²⁺), and ^[6]Zr (mostly Ca²⁺). The network former-BO-network former linkages preferences were also tabulated; Si-O-Al and Al-O-Al were preferred at the expense of lower Si-O-^[3]B and ^[3]B-O-^[3]B linkages. These results provide insights on the structural origins of property changes such as glass-transition temperature caused by the substitutions, providing a basis for future improvements of theoretical and computer simulation models.     

一个国际产、学、研结合的范例--美国伍斯特工学院金属研究所

简要介绍美国伍斯特工学院金属研究所(MPI)在产学研结合方面的成功经验.美国伍斯特工学院是美国历史上第3所工科院校,以重视与企业合作进行工程教育而闻名.MPI是大学研究所与企业的联合体,有包括福特汽车公司、北美压铸协会等131个大大小小的企业及工业协会参加这一联合体.致力于进行针对企业存在的技术问题的基础与应用研究,开发和示范最先进的金属加工技术,为工业合伙人培训雇员等.会员自愿入会,交纳会费,由会员代表组成指导委员会,汇集和整理企业提出的技术需求,每年从中提炼出两个共性的问题,交由MPI进行研究.同时,MPI也同联合体成员共同承担美国政府资助的研究项目,这类项目多数由企业部分出资.研究工作以MPI与企业密切结合的方式开展.联合体每年举办两次会议,由MPI向企业汇报研究结果,交换信息.联合体也以伍斯特工学院为依托,开展企业的人员培训工作.     

稳步发展的压铸技术——第五届中国国际压铸会议论文综述

介绍了“第五届中国国际压铸会议”关于压铸学术交流概况,对压铸生产的发展状况,铝合金压铸、半固态技术的发展,镁合金压铸、半固态技术的发展,计算机模拟技术在压铸中的应用、挤压技术的研究发展和其它方面等6个部分的会议论文进行了评述,并提出了未来压铸行业的工作重点。