大棚托盘假植育苗

介绍了大棚托盘假植育苗的方法 ,包括大棚建造、基质配制、母床播种、托盘假植及育苗管理等。     

铁路棚洞落石冲击力分析

铁路隧道规范未对棚洞顶落石冲击力的计算提供方法,为完善设计,确保结构安全,借鉴了相关计算手册及论文的结论,并运用数值分析的办法,对落石冲击力进行研究。     

Influence of pH on the permeability of p-toluidine and aminopyrine through shed snake skin as a model membrane

The influence of pH on the permeability of p-toluidine (pKa, 5.3) and aminopyrine (pKa, 5.0) through shed snake skin as a model membrane was studied. The pH was adjusted to several values, and the solubility of the drugs in each donor was measured. Flux rates and permeability coefficients were calculated from the steady-state penetration portions. The flux rates of p-toluidine decreased as the pH value in the donor solution increased. On the other hand, the flux rates of aminopyrine were constant at any pH value. The permeability coefficients of each drug increased as the pH value in the donor solution increased. The partition coefficients (octanol/buffer) of each drug were dependent on the molecular fraction of un-ionized species. From these results, it is suggested that ionized species of p-toluidine transports through shed snake skin, but the ionized species of aminopyrine does not.     

The Poetics of the Island of Vessels

Since 2000, Neil Spiller has been engaged on a ‘long project’: a series of hundreds of drawings that through a potent mix of cyborgian fantasy and Surrealism, imbued with poetry and biotechnology, evoke a psycho-geographical island inhabited by an irascible alter ego, ‘The Professor’. Spiller seeks out in this work ‘an unusual and startling architecture’ that reveals a ‘loving, enigmatic and ragged beauty’.     

棉Tencel混纺竹节布的织造实践

为了解决棉Tencel混纺竹节布在生产中出现的布面起圈、纬缩等问题,通过调整穿筘、穿综、穿停经片方法,优选经位置线、开口时间、开口量、喷嘴气压等织造工艺参数,并采用小开口、高后梁、早开口、迟引纬的工艺配置,基本消除了织造过程出现的疵点,织机效率由66%提高到85%左右,下机一等品率达到96.5%以上。     

薄煤层回采巷道支护技术研究

晋能煤运临汾公司金源达煤业31118工作面下副巷为薄煤层回采巷道,当采用工字钢棚对棚支护时,经常出现顶梁破断,棚腿扭曲这些典型的结构性失稳现象,因此,提出了棚索耦合支护方式,并采用FLAC数值模拟软件进行模拟。结果表明,棚索耦合支护能很好地改善围岩应力状态,围岩控制效果显著。工业化试验结果表明:棚索耦合支护能够有效地控制巷道围岩变形,巷道支护效果良好。     

冬期施工保温简易棚的应用

本文主要介绍冬期施工地下结构工程时 ,保温简易棚的应用 ,保温效果好 ,使用此法能够实现较好的经济、技术效果 ;确保结构的冬期施工质量     

水轮发电机推力轴承甩油的技术改造

水轮发电机推力轴承甩油是机组安装、运行中的常见问题,但目前还无法彻底根治。本文对这一问题进行了分析和论述,采取一系列的技术改造措施,使得该问题得以彻底解决。     

生产高密缎条织物的工艺调试要点

探讨在omniplus-190型喷气织机上生产特细号高密缎条织物的工艺调整方法.针对该品种总经根数多、织机效率低、布面质量差的问题,经过试验摸索,认为在穿筘工序采用每筘4入,在穿综工序地组织采用飞穿法、边组织采用纬重平穿法,在织造工序合理设定开口角、综框高度、开口时间、后梁、停经架、上机张力、引纬工艺等参数,可使织机效率由60%左右上升到85%左右,下机一等品率达98%.     

巷道棚子支护对围岩传热影响研究

围岩散热在矿井热源中占有很大的比例,而棚子支护对巷道围岩传热产生一定的影响。利用数值计算方法,采用湍流模型Standard k-e,分析了在雷诺数25860~689600下棚子支护巷道的湍流传热、流阻及对巷道风流的影响。结果表明,棚子支护增大对流换热强度,加大壁面向巷道空间散热,随雷诺数的增大呈线性增强;巷道棚子支护扩大了温度梯度,使距离壁面0.75m处温度便显著增加,压差随雷诺数呈指数函数增加,而无支护压差呈直线增加。