多领域学者共探固体中的机械波

有很多领域的科学家和工程师都在研究机械波的传播，包括力学、应用数学、应用物理学、材料工程学、结构工程学、岩土工程学和地震学，其数学理论都是弹性动力学的波动方程，但处理的方式、方法有很大的不同。因此不同领域之间的交流与合作无疑将推动波动学的发展。     

浅谈社会工程学入侵

在对信息安全越来越重视的今天，我们为电脑安装上了最好的防火墙软件，杀毒软件升级到了最新的病毒库，所有的软件都安装了漏洞补丁，用户密码设置的极为复杂，我们自认为构造了一个固若金汤的电脑安全防护体系。但是，重要信息依然被对手窃取，而且对手视我们的技术防护与无形，这就是现在最难防御的社会工程学入侵。     

“高档有机颜料喹吖啶酮开发”项目通过省级鉴定

由浙江科技学院生物与化学工程学系李武、蒋家新、活泼等老师与温州金源化工有限公司张孚山等承担的浙江省网上招标项目“高档有机颜料喹吖啶酮开发”项目于10月30日在杭州通过了省级鉴定。喹吖啶酮类是国际上公认的高档有机颜料，具有着色力强，耐热性、耐候性、耐溶剂性和耐色迁移性好等特点，     

锅柄的改良性设计

作为人机界面的锅柄,是锅具设计的重要环节.人操持锅柄的方式、姿势及舒适度,受制于锅柄的形态.通过对锅柄操作方式的解析,综合人机工程学、审美、技术与市场等多方面因素,辅以模型制作与实验等方法,获取了握柄类产品设计的成功经验.     

Effects of hyaluronic acid－chitosan－gelatin complex on the apoptosis and cell cycle of L929 cells

With the development in the field of tissue engineering, the interaction between biomaterials and cells has been deeply studied. Viewing the cells seeded on the surface of materials as an organic whole, cell cycle and apoptosis are analyzed to deepen the study of cell compatibility on biomaterials, while cell proliferation and differentiation are studied at the same time. In this paper, hyaluronic acid is incorporated into the chitosan-gelatin system. Propidium iodide (PI) was used in cell cycle analysis and the double-staining of cells with annexin-V and PI was applied in cell apoptosis analysis. The results show that incorporated hyaluronic acid shortens the adaptation period of cells on the material surface, and then cells enter the normal cell cycle quickly. In addition, added hyaluronic acid inhibits cell apoptosis triggered by the membranes. Therefore, hyaluronic acid improves the cell compatibility of chitosan-gelatin system and benefits the design of biomimetic materials.     

Nanoengineering of Flux Pinning Sites in High－Tc Superconductors

Volume pinning forces were determined for a variety of bulk high-Tc superconductors of the 123-type from magnetization measurements. By means of scaling of the pinning forces, the acting pinning mechanisms in various temperature ranges were identified. The Nd-based superconductors and some YBCO crystals exhibited a dominating pinning of the δTc-type (i.e., small, superconducting pinning sites). In contrast to this, the addition of insulating 211 particles provided pinning of the δl-type; providing effective pinning in the entire temperature range acting as a “background” pinning mechanism for the peak effect. Due to the small coherence lengths of the high-Tc compounds, effective pinning sites are defects or particles of nanometer size relative to ε^3. Integral magnetic measurements of the magnetization as a function of temperature in large applied magnetic fields (up to 7 T) revealed that practically all high-Tccompounds were spatially inhomogeneous, which could becaused by oxygen deficiency (YBCO), solid solutions of Nd/Ba (NdBCO and other light rare earth compounds), intergrowths (Bi-based superconductors), and doping by pair-breaking dopants like Zn, Pr. This implies that the superconducting sample consists of stronger and weaker superconducting areas, coupled together. In large applied fields, this coupling gets broken and the magnetization versus temperature curves revealed more than one superconducting transition. In contrast, irradiation experiments by neutrons, protons,and heavy-ions enabled the artificial introduction of very effective pinning sites into the high-Tc superconductors, thus creating a large variety of different observations using magnetic data. From all these observations, we construct a pinning diagram for bulk high-Tc superconductors explaining many featuresobserved in high-Tc samples.     

Changes in permafrost ecosystem under the influences of human engineering activities and its enlightenment to railway construction

~~disturbedhigh-coldmeadowarea,theoriginalvegetationisverydifficulttorestorealthoughitssurfacelandscapecanberestoredtoacertaindegree.Borrowpitsandpilinggroundshavegreatdestructiontothehigh-coldmeadow,thehigh-coldmeadowecosystemalmostcannotbere-storedbynaturalprocesses,therefore,greateffortsshouldbemadetoavoidsettingupborrowgroundinthehigh-coldmeadowregion.AcknowledgementsThisworkwassupportedbytheNationalNaturalScienceFoundationofChina(GrantNos.90102001and30270255)andtheKeyProjectionofKnowl…     

坐姿理论与座椅设计原则及其应用

从人机工程学原理讨论了坐姿的优缺点，良好坐姿的必要条件是将最适当的压力分布于备脊椎骨之间的椎间盘上，并将最适当、最均匀的静负荷量分布于所附着的肌肉组织上．运用人体解剖学原理，分析不良坐姿造成的不舒适感和脊椎疾病，用姿势原状恒定原则分析坐姿行为．认为坐姿变化是人体在稳定和变动之间寻求平衡以取得折衷的过程；提出了座椅设计的基本原制度其主要的参考数据，据此对优秀座椅设计范例进行了解析，并说明其各自特色，从而进一步验证了座椅设计的科学依据。     

李言教授

李言,男,汉族,生于1960年6月,陕西彬县人,教授,博士研究生导师,西安理工大学机械工程学科带头人。1979-1983年在陕西机械学院机械制造工艺及设备专业学习,获学士学位,     

汽车工业如何适应人类社会可持续发展——丹尼尔·斯珀林访谈录

汽车是构成人类社会最大的威胁之一，尽管这种看法存在一定争议。”加利福尼亚大学戴维斯分校工程学教授、该校交通研究所首任所长丹尼尔·斯珀林（Danjel SPerljng）在与政策评论家德博拉·戈登（Deborah Gordon）合著的《20亿辆汽车》一书中指出，新技术、燃料、石油和汽车工业的改革以及最新形成的汽车文化，能够造就一个内含集成交通系统的安全、繁荣而有效率的世界。