自然伽马能谱测井在杭锦旗地区的应用

杭锦旗地区二叠系下石盒子组具有岩性复杂、储层物性差及气水识别难的问题,为了解决这些难题,将现有9口井的自然伽马能谱测井曲线应用于储层划分和物性判断、岩性识别以及储层含气性判别中得到了很好的效果,并归纳总结出了自然伽马能谱测井识别气水层的判别标准。自然伽马能谱测井在该地区的成功应用为正确评价杭锦旗地区致密砂岩储层提供了可靠的信息。     

充电法和高密度电法在典型岩溶区勘查中的应用分析

查明贵港地区地下岩溶的发育状况,对当地的建设具有重要的意义。在岩溶区勘查中较常用的物探方法有充电法和高密度电法,首先概述了两种方法的工作原理、装置类型和观测方式;然后通过两处实例说明了联合应用充电法和高密度电法可以确定地下岩溶连通管道的位置和流通方向,高密度电法在典型岩溶区能给出第四系厚度、地层分层、岩溶发育情况、岩溶底部埋深深度等,并通过钻孔验证了探测的准确性。结果表明,充电法和高密度电法均具有较简单的观测方式、较高的工作效率和较直观的解译结果,值得在岩溶勘查中广泛应用。     

地震波层析成像探测技术与水平定向钻拉管技术在地下障碍物探测中的应用

顶管施工属于非开挖施工方法,是一种不开挖或者少开挖的管道埋设施工技术,该项技术彻底解决了管道埋设施工中对城市建筑物的破坏和道路交通的堵塞等难题,在稳定土层和环境保护方面凸显其优势。但是,在顶管施工过程中一旦遇到地下障碍物,将导致顶管顶力突然增大,顶管顶进方向偏离设计轴线,严重影响顶管施工的顺利进行。福州市某污水顶管施工需要穿越河道,通过前期资料收集发现,河道两侧可能存在护岸抛石等地下障碍物。为了查明护岸抛石的分布情况,综合应用了地震波层析成像探测技术与水平定向钻拉管技术进行探测,既为后期顶管施工的顺利进行提供了参考依据,又降低了探测成本,提高了探测效率。     

图案化电极的离子聚合物金属复合物扭转特性研究

以商业膜和自制梯度膜为基膜,采用化学镀的方式得到图案化电极的离子聚合物金属复合物(IPMC),分析其扭转特性。在直流电压驱动下,梯度膜IPMC可实现扭转角度大于商业膜IPMC可实现扭转角度;当直流电压为5V时,梯度膜IPMC扭转角度是商业膜IPMC最大扭转角度的5倍多。在交流电压驱动下,扭转角度随着电压逐渐增大而增大;当交流电压为5V时,梯度膜IPMC最大扭转角度是商业膜IPMC最大扭转角度的2倍多。     

Power recovery method for testing the efficiency of the ECD of an integrated generation unit for offshore wind power and ocean wave energy

Offshore wind power and ocean wave energy are clean, renewable and rich resources. The integrated generation unit for the two kinds of energy is introduced. The energy conversion device (ECD) is utilized to convert the mechanical energy absorbed from the wind power and wave energy into the hydraulic energy, the conversion efficiency of which is significant. In this paper, a power recovery method for testing the efficiency of the ECD is proposed. A simulation desktop is developed to validate the proposed method. The efficiency of the ECD is influenced by the hydraulic cylinders and the mechanical transmission. Here, the static efficiency of the hydraulic cylinders of the ECD is tested first. The results show that the static mechanical efficiency is about 95% and that the volumetric efficiency is over 99%. To test the effects induced by the mechanical transmission of the ECD, each hydraulic cylinder of the ECD is substituted with two springs. Then the power loss of the ECDM under different rotational speeds is obtained. Finally, a test platform is built and the efficiency of the ECD under different rotational speeds and pressures is obtained. The results show that the efficiency is about 80%.     

Performance evaluation of anti-radiation based on the gamma degradation process

In the environment of space radiation, the high-energy charged particles or high-energy photons acting on a spacecraft can cause either temporary device degradation or permanent failure. The traditional probability model is difficult to obtain reliable estimation of unit radiation resistance performance with small samples. Considering that different products will change differently after high-energy particle radiation, we construct a model based on the gamma degradation process. This model can efficiently describe the law of unit radiation resistance variation with the total radiation dose levels under the effect of the total dose and displacement damage. Finally, the proposed model is used to assess the anti-radiation performance of the N-channel power MOSFET device STRH60N20FSY3 produced by STM to obtain average unit radiation resistance, survival probability, survival function, etc.     

Mechanical analysis of double-layered circular graphene sheets as building material embedded in an elastic medium

Journal of Central South University - Possessing the unique and highly valuable properties, graphene sheets (GSs) have attracted increasing attention including that from the building engineer due...     

Morphology study of oriented SmBCO film deposited by MOCVD

c-axis-oriented SmBa_2Cu_3O_7(SmBCO) films have been deposited on(100)- LaA1O_3(LAO)substrate by metal organic chemical vapor deposition(MOCVD) technique.The effects of deposition temperature(T_(dep)) and total pressure(P_(tot)) on the orientation and microstructure of SmBCO films were investigated.The orientation of SmBCO films transformed from α-axis to c-axis with increasing of T_(dep) from 900 to 1 100℃.At T_(dep)=1 050℃,SmBCO films had c-axis orientation and tetragon surface.At P_(tot)~(dep)=400-800 Pa and T_(dep)=1 050 ℃,totally c-axis-oriented SmBCO films were obtained.The R_(dep) of SmBCO films increased firstly and then decreased with increasing P_(tot).The surface of SmBCO films exhibited tetragon morphology at 1 050 ℃ and400 Pa.Maximum thickness of SmBCO film deposited was 1.2μm at P_(tot)= 600 Pa,and the corresponding R_(dep)was 7.2 μm·h~(-1).     

Influencing mechanism and interaction of muscovite on thermal decomposition of ammonium polyphosphate

The interaction mechanism and phase evolution of ammonium polyphosphate(APP)mixed with muscovite(APP/muscovite)were studied by TG,XRD and SEM,respectively,during heating.When the temperature is not higher than 300 ℃,muscovite has no effect on the thermaldecomposition of APP,and the initialdecomposition temperature of APP/muscovite at 283 ℃ is basically the same as the APP at 295 ℃,and the main thermaldecomposition products are polyphosphoric acid and NH_4H_2PO_4 at 300 ℃.The polyphosphoric acid,the decomposition products of APP,can enable K and Siout of muscovite and interact with muscovite chemically to generate Al_2O_3·2SiO_2,α-SiO_2 and phosphates(AlPO_4 and K_5P_3O_(10))compounds during 400 ℃-800 ℃,which own obvious adhesive phenomenon and porous structure with the apparent porosity of 58.4%.Further reactions between phosphates other than reactions among Al_2O_3·2SiO_2 and α-SiO_2 can generate KAlP_2O_7 at 1 000 ℃ and the density of residualproduct is improved by low melting point phosphate filling pore to form relatively dense structure and decrease the apparent porosity to 44.4%.The flame resistant and self-supported ceramic materials are expected to enhance the fire-retarding synergistic effect between APP and muscovite.     

AMPS对PEO/PMMA固态聚合物电解质电导率的影响

针对固态聚合物电解质室温电导率较低的问题,采用刮膜法制备了PEO/PMMA/LiClO_4/AM PS共混聚合物电解质,考察了2-丙烯酰胺-2-甲基丙磺酸(AM PS)的端基磺酸基团对电解质性能的影响.结果表明,添加AMPS后,红外图谱中出现了由C—O的拉伸振动和SO_3~(2-)的络合作用所引起的尖峰.PMMA与PEO共混后,大大降低了PEO的结晶度,且添加AMPS后,电解质形成了完全均相体系.AMPS的添加使得电解质的电导率明显提升了两个数量级.当AMPS的质量分数为1.3%时,电解质的室温电导率达到最大值.添加同样含有端基磺酸基团的液晶离聚物(LCI)后,电解质的电导率无明显提升,因而可以选择磺酸基团质量比更高的AMPS作为添加剂.