巷道混凝土地坪和水沟连体浇筑技术

斜沟煤矿+700m水平8号煤南翼辅助运输大巷,为矿井的主要运输线路,计划建设成矿井的1条精品和示范性运输线路,对混凝土地坪施工质量要求较高,并要求实现巷道混凝土地坪和水沟连体浇筑一次成型;现场工程技术人员参考地面铺路工艺,并结合煤矿井下施工特点,经过多次试验修改,制定了一套完整的混凝土地坪和水沟连体浇筑工艺,并配套设计制作了插件式整体水沟模板,克服了施工距离长、工程量大、工期紧、质量标准高等难题,达到了矿方要求目标,实现了单点作业日铺80m的速度,有力的支持了施工生产,获得了较好的经济效益。     

Crack propagation prediction of CFRP retrofitted steel plates with different degrees of damage using BEM

Although carbon fibre reinforced polymer (CFRP) materials have proven effective in strengthening steel structures especially when used to improve fatigue behaviour, further study is required to investigate their effectiveness when applied at different stages of crack propagation in steel elements. This paper presents a numerical study on CFRP retrofitted steel plates with different degrees of damage using the boundary element method (BEM). The numerical results compared well with the experimental data, which demonstrated that the BEM is reliable for crack propagation analysis of CFRP laminate retrofitted steel plates. Finally, a parametric analysis was conducted to investigate the influence of bond length, bond width, CFRP stiffness and adhesive shear modulus on stress intensity factor (SIF) values.     

Electromagnetically induced transparency in a quadratically coupled optomechanical system with an atomic medium

We investigate a quadratically coupled optomechanical cavity system filled with a two-level atomic medium. The output of the cavity field exhibits analogous electromagnetically induced transparency when the optomechanical system interacts with the coupling and probe fields, respectively. We show that the introduction of the atomic medium can enhance the fluctuation of the displacement of the membrane as well as its energy. With the increasing of the atomic number, the dip of the absorption becomes deep.     

Non-Resonant Structure Design of Catenary Transformer in Ultrasonic Gear Honing

To solve the design problem of transformer composed of non-resonant structure in ultrasonic gear-honing,force coupling conditions for moderately thick annular plate (MTAP) and catenary horn are propose...     

天洋广场工程设计

以具体工程为例,探讨了商住混合类项目在工程设计中遇到的难题,论述了整个项目的设计思路及过程.在具体设计中,使用钢板剪力墙来解决剪力墙体抗剪承载力不足的问题,提供了一个行之有效的解决思路；使用后浇带解决了桩基础设计中不均匀沉降问题.     

双机架平整机组平整液斑迹综合治理技术开发

以梅钢1420双机架平整机组为研究对象,在对平整液斑迹形成原因进行深入分析的基础上,从管路改造与吹扫压力的优化、增强吹扫力度、喷梁与喷嘴角度的优化、接水装置的设计与安装、日常维护等五个方面入手,提出了一套适合于双机架平整机组的平整液斑迹综合治理技术,并将实应用到生产实践,取得了良好的使用效果,有效地清除了带材表面的平整液斑迹缺陷,提高了带材的表面质量,给现场创造了较大的经济效益,具有进一步推广应用的价值.     

磁铁尾矿与石灰石双掺生产优质水泥

受环保压力影响，西乡公司生产水泥用河道淤沙供应紧张，难以满足生产需求且价格上涨幅度较大，严重影响到水泥生产及成本，我们开展了磁铁尾矿在水泥中的应用研究工作，通过连续几个月的生产实践，对物料配比优化，磨机技术改造，实现利用磁铁尾矿与石灰石双掺解决混合材紧缺问题，降低了水泥生产成本，水泥质量及性能稳定。     

Novel method for separation and screening of lubricant-degrading microorganisms and bacterial biodegradation☆

With the rapid increase of lubricant consumption,oil contamination becomes more serious.Biotreatment is an important method to remove oil contamination with some advantages.In this study,acclimatized oilcontaminated soil and used lubricating oil were sampled to isolate lubricant-degrading strains by several methods.51 isolates were obtained and 24-well plates were employed to assess bacterial potential in highthroughput screening.The method was noted for the prominence of oil–water two-phase system with saving chemicals,shortening cycles and lessening workloads.In order to decrease inaccuracy,subculture and resting cells were inoculated into mineral salt medium with 200 μl oil in well plates for the cultivation at 37 °C for 5and 7 days,and the biodegradation potential was characterized by the changes of oil film and cell density.With appropriate evaluation by shaking flask tests,5 isolates were retained for their potentials with the maximum biodegradation from 1500 to 2200 mg · L~(-1)and identified as Acidovorax citrulli,Pseudomonas balearica,Acinetobacter johnsonii(two isolates with different biodegradation potentials)and Acidovorax avenae using 16 S r RNA sequencing analysis.Also,lipase activity was determined using indicator titration and p-nitrophenyl palmitate(p-NPP)methods.The results indicated that only p-NPP was successful to test lipase activity with the range of 1.93–6.29 U · ml~(-1).Although these five strains could degrade 1000 mg · L~(-1)lubricating oil in158–168 h,there existed distinct difference in enzyme activity,which demonstrates that lipase activity could not be used as the criterion to evaluate microbial biodegradation potential for petroleum hydrocarbons.     

一种洗碗机溢水保护系统的设计

洗碗机溢水一般是指洗碗机进水过多,水溢出内胆底部而流到洗碗机底部钢板上。当溢出的水量超过底部钢板设定的蓄水容量时,洗碗机应发出报警信号及时切断进水,防止因进水过多而引起的事故。如果洗碗机溢水不能被检测和控制,由于洗碗机底部钢板盛水量有限,洗碗机溢出的水会从底部钢板流到地面上,会对地板、厨房甚至房屋造成极大的安全威胁,因此洗碗机具有安全可靠的溢水保护系统至关重要。     

大型渡槽盆式橡胶隔震支座轴向刚度研究

盆式橡胶支座用于大型、特大型渡槽结构时,支座设计时如何合理地确定其各种结构参数显得十分重要。考虑到盆式橡胶支座各组成构件的直径和厚度的变化,以及在轴向压力作用下盆式橡胶支座的压缩变形特征,利用变分原理和卡氏第二定律导出了盆式橡胶支座的轴向刚度计算公式。通过比较,计算值与实测值的吻合程度较好。