高斯思想在初等数学中的渗透

通过高斯思想在初等数学的代数、三角等方面的渗透，从而启迪学生的思维，培养学生的能力。     

如何摆脱黑色星期一

不知道您有没有发现每到星期一的时候，常会感到疲倦不适，工作效率下降。它是一种常见的职业病——“黑色星期一”。     

气浮-水解酸化-SBR处理裘皮生产废水

某皮革有限公司以山羊皮为原料皮，年生产80-100万张裘皮。该公司生产工序包括两个湿操作和千操作两部分，湿操作包括准备工段和鞣制工段，干操作也就是整饰工段。裘皮生产污水主要来自湿操作各工序，根据裘皮生产工艺可以分为四股废水：1．浸水脱脂及其洗水；2．浸酸、铬鞣及洗水；3．染色加脂及洗水；4．其他污水、冲洗、饱和滴漏等，每天外排污水量为2000m^3。该工程采用气浮法-水解酸化法-SBR法综合处理工艺，处理后出水达到《污水综合排放标准》（GB8978-1996）一级标准。     

技术创新风险控制策略

企业的生命力取决于它能否使产品不断更新换代,满足市场不断变化的需求.为此,只有通过持久的技术创新才能实现.技术创新作为一项高风险活动,因其受到许多不确定因素的影响而存在着巨大的风险.因此,对技术创新进行风险分析,科学地控制和防范风险,对企业成功地进行技术创新,增强核心竞争力,提高技术创新效率是有十分重要的意义.     

或有事项对企业财务能力影响的分析——兼谈会计中的不确定性

阐述了或有事项引起的财务报表变动，建立了一套财务指标，分析了或有事项对企业财务能力的影响，并指出在不确定性会计处理中应注意的几个问题。     

Hydrostatic settling velocity of sediments

The settling of sediments is an accelerative process in which the concentration of the main sediments zone will heavily influence settling velocity, but the explicit relationship between the concentration and settling velocity has not been reported in literature. Here a theoretical function was built for the time dependent concentration and time dependent settling velocity of sediments ; then the entire settling process reflecting concentration was shown on the basis of sediments instant-settlement theory and mathematical method. Agreement of computed results and experimental data was found. Several governing parameters, including particle size,particle density,inltial suspended sediments concentration and suspension height, were discussed with a series of calculated velocity curves. The research indicated that (1) the presented concentration-velocity time relationship is rational, (2) settling process of the sediments group with variation of concentration consists of acceleration stage, uniform motion stage and deceleration stage, and (3) particle size, particle density and initial suspended sediments concentration have more influence on the settling velocity than the suspension height and water temperature.