经肝胃造瘘胃肠道支架成形术

目的探讨病情复杂的胃、十二指肠梗阻的支架成形术的方法及疗效.方法总结分析经口途径较难处理的胃、十二指肠支架成形术病例4例,其中2例Roux-en-Y吻合术后输入段十二指肠恶性梗阻并继发胆道梗阻的患者经肝途径置入支架;1例幽门区恶性狭窄和1例十二指肠降部恶性狭窄患者分别经胃造瘘置入支架.结果所有支架释放成功,患者均在术后第3天开始进流质,无消化道出血等并发症.随访期内均无支架移位及再狭窄.结论掌握技巧,肠道支架成形术在复杂性胃、十二指肠梗阻的治疗是可行的.     

米粉面包生产工艺的研究

采用单因素试验,首先向含米粉30%的面包中添加不同种类的食用胶、表面活性物质及不同比例的糊化米粉,根据面包比容及内部组织筛选出效果比较好的食用胶进行复配,然后向面包中添加不同比例的米粉、糊化米粉及不同种类的复配食用胶,根据面包比容及内部组织确定,米粉面包最佳生产工艺。     

矿井安全管理全息动态监控方法的研究与应用

介绍了“矿井安全管理全息动态监控方法”的研究应用情况,详细说明了其原理和实施方 法步骤,可供各类矿井的安全管理工作参考。     

城市市政公用设施普查(管线)资料的维护及应用

1.概况为了完成国务院颁布的《九十年代国家产业政策纲要》提出的要加快城市市政公用事业的发展的要求,满足各行各业和人民群众日益增长的物质文化和要求加快城市基础设施建设的呼声,改善国内外投资者对以城市基础设施为主要内容的投资环境。     

在微波辐照下Li1+xMn2-xO4尖晶石的固相合成

采用微波直接加热方法在不同温度与氧分压条件下制各出Li1 xMn2—xO4(x＝0、0．025、0．05、0．15)尖晶石氧化物．利用XBD与SEM／EDX等手段研究了合成样品的晶体结构、形貌特征以及相交特点．在850～1200℃氧气氛下加热时，合成的样品由立方尖品石相和微量的杂相Li2MnO3组成，而且随着温度升高，晶体中阳离子混合现象减少，晶体结构的对称性增大，但是晶体结构的参数基本不变．Li1 xMn2—xO4样品中杂相Li2MnO3的含量随x的增大而增加．在相同的温度与氧分压下，用微波加热合成的尖晶石氧化物的热稳定性比用常规加热方法合成的高．用微波加热合成的尖品石氧化物结晶度好，晶体颗粒呈规则的八面体或多面体形态。     

安棚深层系固井技术研究

河南安棚油田深层系深井存在着地温梯度大、封固段长、含碱层造成“糖葫芦”井段，顶替效率低等固井施工难点，针对这一难题，通过室内大量实验，对原有的水泥浆体系进行改进、研究，优选出了合适的水泥浆外加剂，提出了素流、塞流复合顶替固井技术，经过现场应用，较好地解决了深井固井质量问题。     

定重装载的PLC控制系统

分析了当前定容装载装置导致有效提升载荷不确定的原因，以及对提升机提升能力的限制和对提升机安全运行的影响，介绍了一种由PLC控制的液压定重装置的程序设计和应用。     

高压调制器在LHCD系统中的长脉冲运行

1995年以来在HL-1M装置上成功地进行了LHCD实验,取得了丰硕的成果。近两年来,为了在HL-1M上做更加深入的LHCD物理实验,对LHCD微波系统提出了更高的要求。这样原有的电源已不适应新的要求。第一,要求电源系统输出两路负高压,供给微波系统的两只速调管,以达到MW级的微波功率输出。第二,要求在脉冲宽度大于1s的长脉冲方式下工作。第三,由于LHCD微波系统的相位测量与反馈控制调试的要求,电源应具有两路连续脉冲输出,且脉冲宽度大于5ms。为了保证实验顺利进行,必须对电源系统的其中一台脉冲调制器进行技术改造。包括调整管的栅极控制电路进行重新设计;改善调整管的冷却。这也是LHCD电源系统所面临的重大技术难题。     

A 4m 2kA HTS Power Cable System

A high temperature superconductor （HTS） cable system of both a length of 4 metre and a normal current of 2 KA with terminations and a cooling system has been built up and tested. The cable conductor was made of Bi-2223 tape. A space maintained vacuum between two corrugated stainless steel tubes functions as the cryostat surrounding the superconductor. A series of tests were carried out to verify the functions of the system. The important data obtained can be used to make longer HTS cable systems.     

Divertor Experiments with MBI and Strong Gas Puffing on HL-2A

In the HL-2A 2004 experiment campaign, pulsed molecular beam injection （MBI） and strong hydrogen gas puffing under the divertor configuration were used for gas fueling. The experimental results show that the MBI of hydrogen can reduce the heat flux to the divertor target plate. The electron temperature measured by the Langmuir probe array decreases significantly during the injection of the molecular beam whereas the electron density increases. This indicates that the plasma pressure near the target plates tends to be constant at a new equilibrium level. In the divertor plasmas with strong hydrogen gas puffing a high plasma density up to 4.4 × 10^19 m^-3 was achieved. In addition, a phenomenon similar to the partially detached divertor regime was observed, which is being studied in open divertor tokamaks such as DIII-D to reduce the peak heat flux on the target plates near the separatrix. After a strong gas puffing the electron temperature measured on the outer divertor target plate near the separatrix decreases till below 5 eV or even lower, but that of the farther outer divertor target plate does not change obviously; and the CIII and the Ha emissions at the plasma edge decrease as expected, but the Ha emission near the Xpoint increases. These results reflects some interesting characteristics, which needs to be studied by further modeling and experiments.