伊朗棒小蜂科昆虫种类（膜翅目：小蜂总科）

本文记述伊朗的棒小蜂科昆虫3个属（ Chartocerus MotschuLsky,Thysanus WaLker和Signiphora Ashmead）11种,同时,记述了每一种的异名、寄主和国内外分布情况。     

间隙环流作用下的转子动力学性能分析

为研究间隙环流对转子动态性能的作用规律,根据流体的连续定理和动量定理建立了描述间隙环流运动规律的偏微分方程组,采用线性摄动方法将间隙环流内流体压力的稳态量和动态量分离,求解得到间隙环流动态作用力的表达式.为验证该流场计算模型,搭建了一个实验装置.使用有限元方法建立实验台干转子的动力学模型,通过实验测试干转子的固有频率,对动力学模型中法兰连接处的接触刚度等参数进行标定.将间隙环流的动态作用力分解为质量矩阵、刚度矩阵、阻尼矩阵的形式,施加到干转子动力学模型上,得到湿转子的动力学模型.求解该模型得到转子的动力学特征参数对于转子转速的变化规律.通过对间隙环流试验模型进行计算和实验测试,验证了该模型的有效性.研究结果表明,间隙环流能显著降低转子的固有频率,并能够在一定的转速范围内造成转子失稳.     

Moisture effect on the combustion of a single copper concentrate particle in a flash smelting furnace

A mathematical model has been presented to study the combustion of a single copper concentrate particle with high moisture content. By using the presented model, the effect of particle moisture content on particle temperature, sulfur oxidation, and combustion heat generation has been evaluated. The mineralogical composition of the commonly used concentrate at Khatoonabad flash smelting furnace has been used in this study. It was found that the particle moisture content is removed in the sub-second time range and thus the moisture has marginal impact on the variation of particle temperature and on the reaction rate when the gas temperature is assumed to be constant in the reaction shaft. When a concentrate with high moisture content is charged, the particle size enlargement due to the agglomeration of concentrate particles causes an abrupt fall in the particle reaction rate.     

座舱功能试验压力控制系统建模与PID控制器设计

针对座舱功能试验压力控制系统参数调试不允许在飞机座舱上直接进行的问题,建立了包括气动减压阀阀芯构件动态特性与试验管道压力变化过程等因素在内的座舱功能试验压力控制系统模型,可使压力控制系统设计客观化、解析化.通过对系统模型进行线性化和拟合降阶,再根据降阶模型应用解析化方法,设计了座舱功能试验压力控制系统的比例、积分、微分（PID）控制器,并对设计结果进行了仿真验证.结果表明,解析化方法设计的PID控制器可以满足飞机座舱功能试验压力控制系统的技术要求.
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Dry face milling of titanium alloys

In machining titanium alloys, cutting tools generally wear out very rapidly because of the high cutting temperature resulted from the low thermal conductivity and density of the work material. In order to increase the tool life, it is necessary to suppress the cutting heat as much as possible by applying an abundant amount of coolant, but this will entail serious techno-environmental and biological problems. To study the performance and avoid these limitations, a PVD-coated insert was used to the dry face mill of (α +β) titanium alloys. As a result it was found that the inserts exhibit an excellent cutting performance at low cutting speeds and feed rates, and there is no significant difference in the dominant insert failure mode between the wet and dry cutting in discontinuous cutting.     

提高柔性自动生产线可靠性的动态故障分析法

提出了一种用于柔性自动生产线可靠性研究的动态故障分析方法.该方法是一种包括动态分析、过程分解和结构故障树的综合研究方法.从技术上对自动生产线进行分析,依照不同的功能将其分解成几个部分,建立各部分的故障树以找出所有可能引起故障的原因及其影响程度,并给出一种对危机事件进行定性评价的方法.通过对设备工艺修改来达到简化故障树和提高系统可靠性的目的.上述方法与传统故障分析法相比具有更好的灵活性和适应性,对现场工程师十分有用.     

Photocatalytic degradation of methylene blue by nanostructured Fe/FeS powder under visible light

The photocatalytic performance of mechano-thermally synthesized Fe/FeS nanostructures formed from micron-sized starting materials was compared with that of a thermally synthesized nanostructure with nano-sized precursors in this paper. The properties of as-synthesized materials were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), diffuse reflectance spectroscopy (DRS), and ultraviolet-visible (UV-Vis) spectroscopy. The effects of irradiation time, methylene blue (MB) concentration, catalyst dosage, and pH value upon the degradation of MB were studied. Magnetic properties of the samples showed that both as-synthesized Fe/FeS photocatalysts are magnetically recoverable, eliminating the need for conventional filtration steps. Degradation of 5 ppm of the MB solution by mechano-thermally synthesized Fe/FeS with a photocatalyst dosage of 1 kg/m3 at pH 11 can reach 96% after 12 ks irradiation under visible light. The photocatalytic efficiency is higher in alkaline solution. The kinetics of photocatalytic degradation in both samples is controlled by a first-order reaction. However, the rate-constant value in the thermally synthesized Fe/FeS photocatalyst sample is only 1.5 times greater than that of the mechano-thermally synthesized one.     

Identification of functional genes during Fas-mediated apoptosis using a randomly fragmented cDNA library

We describe a general strategy for the identification of functional genes that, when downregulated, result in a selectable phenotype. This strategy is based on expression selection of cDNA fragments that counteract their cognate genes. A cDNA library containing random fragments expressed in human HepG2, A375 and CLS-354 cells was used to identify functional genes whose inhibition conferred resistance to Fas-induced apoptosis. Thirty-five clones were isolated, 28 of which were derived from unknown genes, that tagged 19 individual genes and 7 of which referred to known genes that tagged the apoptosis-related protein (APR)-1, -2 and indoleamine-pyrrole 2,3,-dioxygenase (IDO). The ability of APR-1-, -2- and IDO-derived antisense RNAs to induce resistance to Fas in HepG2, A375 and CLS-354 cells suggested that APR-1, -2 and IDO genes are involved in the machinery of Fas-mediated apoptosis. Our gene discovery strategy provides a generally applicable procedure to identify functional genes that interfere with apoptosis, and may therefore be clinically relevant for tumor therapy.Received 28 April 2005; received after revision 20 June 2005; accepted 5 July 2005     

板料激光直线扫描弯曲角度的解析模型

基于传统固体力学的平衡方程和相容性关系,同时考虑了板料激光成形中加热阶段的塑性变形和冷却过程的弹性变形,利用已有的激光扫描温度分布模型,建立了板料成形弯曲角度的解析模型.通过与实验数据相比,验证了该模型的准确性;与Vollertsen和Yau模型的比较结果表明,该模型精度远远高于现有其他的解析模型.