Clinical and experimental observation of xilixin granule combined with radiotherapy in treating malignant-tumors

Thirty six patients of pulmonary or nasopharyngeal carcinoma were treated with Xilixin granule (XLXG) combined with radiotherapy and compared their efficacy with that of 31 patients treated by Zhenqi Fuzheng granule combined with radiotherapy for control. Results showed that the symptoms of Yin Deficiency syndrome in treated group were obviously improved, the leucocyte decreased by 5.6%, while in control group it reached 25.8%, the 3 year survival rate was significantly higher in treated group (75.0%) than that in control group (51.6%). Animal experiment revealed that XLXG had the effects of tumor inhibition, it could increase white blood cells, platelets and hemoglobin of patients, especially in using large dosage. These results suggested that XLXG have some protective effect against radiotherapeutic damage in patients with malignant tumor.     

中东原油馏分油加氢生产润滑油基础油

分析了中东原油馏分油的基本性质，综述了加氢裂化、加氢处理、加氢脱蜡、加氢精制及组合工艺的工业应用情况，探讨了由中东原油馏分油生产润滑油基础油应注意的问题，提出了适合炼油厂生产润滑油的建议。     

Real time frequency domain fiberoptic temperature sensor

The excited state phosphorescence lifetime of alexandrite crystals is used to monitor temperature in the physiological range from 15-45°C with precision and accuracy of 0.2°C. A 500-μm cubic alexandrite crystal bounded to the distal end of an optical fiber of similar core dimensions is excited with pulsed Ne-He laser light. This apparatus uses a sampler for data acquisition and frequency domain methods for data fitting. The instrument amplifies the AC components of the detector output and band limits the signal to 12.5 kHz. The fundamental frequency of the excitation is set to 195.13 Hz to obtain 64 harmonics. This band limited signal is sampled and averaged over few hundred cycles in the time domain. The frequency domain representation of the data is obtained by employing fast Fourier transform algorithms. The phase delay and the modulation ratio of each sampled harmonic are then computed. Five to 50 values of the phase and modulations are averaged before computing the sensor lifetime. The instrument is capable of measuring precise and accurate excited state lifetimes from subpicowatt luminescent signals in plastic optical fibers. A least squares fit yields the lifetimes of single exponentials. A component of zero lifetime is introduced to account for the backscatter excitation seen by the photodetector leaking through optical interference filters. The phosphorescence lifetimes measured reproducibly to about three parts in a thousand are used to monitor physiological temperature. Temperatures are computed employing empirical polynomials. The system drift is negligible over 15 h of continuous operation. The instrumentation and methods allow 1.3-s update times and 30-s full response times     

一个全数字化交流永磁伺服系统

介绍了开发的全数字交流伺服系统的组成、基本原理及软、硬件结构。通过与模拟交流伺服系统的比较，说明了全数字交流伺服系统可编程能力强、系统稳定性好、系统性能提高等特点。     

我国力车胎行业现状与展望

介绍了2002年我国力车胎的行业现状。近年的发展及展望。并着重描述了力车胎专用设备的新发展。     

Convergence analysis of hybrid bi-directional associative memory neural networks with discrete delays

In this paper, the dynamical characteristics of hybrid bi-directional associative memory (BAM) neural networks with constant transmission delays are investigated. Without assuming the symmetry of synaptic connection weights and the monotonicity and differentiability of activation functions, the Lyapunov functionals are constructed and Halanay-type inequalities are respectively employed to derive the delay-independent sufficient conditions under which the networks converge exponentially to the equilibria associated with temporally uniform external inputs. Some examples are given to illustrate that the results are less conservative and less restrictive than the previously known results.     

一种新型硫酸亚铁单液法调剖剂

本文提出用尿素作为ｐⅡ调节剂，加快硫酸亚铁单液法调剖剂中亚铁离子在地层温度下的沉淀，增大沉淀率，提高封堵效能。岩芯流动试验结果表明，１５％ＦｅＳＯ４．７ＩＩ ２Ｏ／５％尿素调剖剂体系的封堵能力比不含尿素的体系增大近一倍。     

烟用香料配制的气相色谱法质量控制研究

采用气相色谱法对香料房卷烟用料液中的溶剂及水分进行检测,分析测定其中的水分、乙醇、丙二醇、山梨醇等的含量,通过对香料房每批配制料液的抽检,可以跟踪料液配制的准确性,保证卷烟产品质量,该方法操作简单、准确性高、重现性好。     

曲边介质波导的有限元分析

本文应用曲边有限元方法有效地计算了曲边质波导的色散特性，编制了相应的计算程序,应用本文方法计算得到的椭圆旬质波导和组合椭圆介质波导的主模和高次模的色散曲线与文献[2],[3]的结果相当吻合。     

沁水盆地煤层气安全钻井工艺

在煤层气钻井过程中，经常出现煤岩坍塌、井漏、煤层气气侵等问题，极大地影响了钻井安全。为了减少钻井事故及井下复杂情况的发生，提高钻井速度，在调研了国内外煤层钻井的现场经验和资料的基础上，结合目前煤层气钻井技术的发展状况，以及华北石油管理局近年来40多口煤层气井的钻井实践，针对沁水盆地在煤层气钻井过程中产生的复杂问题，及对安全钻井影响较大的井漏、坍塌和低密度水泥浆固井等问题，做了一些研究和总结，并提出了相应的解决办法，为同类煤层气的开采提供了借鉴。