决定神经网络隐含层单元数目的自学习算法

基于一种启发式极限吸因子反向传播模式（ＨＴＡＢＰ）提出了一种决定多层前向神经网络中隐含层单元数目的算法。该算法不再用试探法和误差进行网络结构选取，而改由变量参数γ和标准误差函数决定，模拟试验表明：该算法是科学和有效的。     

湖南省四地区室内氡调查

采用ＣＲ－３９固体径迹探测器，在湖南省４地区进行了居室内氡浓度调查，统计学分析表明，４地区室内氡浓度呈对数正态分布。在地形分布上，有西北高、东南低的特点，反映了地质构造和建筑材料等对室内氡浓度的影响。     

SBS和APP树脂石油沥青防水卷材的研制

用ＳＢＢ或ＡＰＰ树脂改性的石油沥青所制成的防水卷材，具有良好的防水性能，抗高温变形能力和抗寒性能，正逐步替代ＰＶＣ煤焦油防水卷材。     

Platinum sulfated zirconia catalysts. Fate of chlorine during activation

The gases evolved during activation of a sulfated zirconia prepared by impregnation with chloroplatinic acid have been followed using mass spectrometry and infrared spectrometry. When the sample is heated in either helium or in air, the halogen is lost from the catalyst as HCl and Cl2. Heating the sample in hydrogen results in the loss of the halogen as HCl, and only traces as Cl2. The loss of halogen occurs over a wide temperature range (200-900°C). The data are consistent with the chloroplatinic acid being converted by loss of halide with the formation of Pt⁰. This revised version was published online in July 2006 with corrections to the Cover Date.     

NC208型甲醇合成催化剂性能及其工业应用

本文介绍一种NC208型新型甲醇合成催化剂的性能及其工业使用情况。从理论、实验室试验和工业应用验证了通过引进M₁O_X、M₂O_Y两种组分对传统Cu-Zn-Al系甲醇催化剂进行改性所带来的工业使用优势。     

Highly efficient upconverters for multiphoton fluorescence microscopy

A new generation of efficient two-photon absorbing fluorescent molecules has been developed and used effectively for two-photon laser scanning microscopy. Several examples of the use of these new fluorophores have been presented. In addition, issues relating to the two-photon absorption cross-section, excitation power, sample properties and resolution in two-photon laser scanning microscopy are discussed.     

Cytochemical energy-filtering transmission electron microscopy of mitochondrial free radical formation in paraquat cytotoxicity.

The generation of oxygen free radicals was investigated using cytochemistry and its energy-filtering transmission electron microscopy in reference to the toxic mediator for the herbicide paraquat. When isolated intact mitochondria from rat livers were incubated in a medium containing paraquat and NADH, a mitochondrial NADH-quinone oxidoreductase activity generated superoxide anions to cause the destruction of mitochondria which resulted in cell death. The superoxide anions were immediately converted into hydrogen peroxide, which then formed cerium perhydroxide deposits in the presence of cerium ions and precipitated on the outer surface of the mitochondrial outer membrane. This localization was also specifically identified by energy spectral imaging and image-electron energy loss spectral analyses. Precipitation reaction was scavenged by the addition of either cytochrome c or catalase and inhibited by dicoumarol (an inhibitor of NAD(P)H-quinone oxidoreductases). These cytochemical energy-filtering transmission electron microscopic results indicated that paraquat generated free radicals from the outer membrane of mitochondria.     

钻井液高剪切速率粘度测试仪及其初步试验

介绍了钻井液高剪切速率下粘度测试仪的工作原理、结构、特点。通过初步试验得出仪器的剪切速率可达到104~105/s的范围,测出的实际粘度较卡森计算公式计算值η卡更为准确,该仪器具有广阔的推广应用前景。     

康平公寓结构设计

较为详细地介绍了康平公寓的结构设计情况及结构计算的全过程。着重介绍了基础选型、柱下圆形独立基础的计算及上部结构构造处理     

热循环对钛合金/不锈钢螺纹钎焊管接头性能的影响

对钛合金／不锈钢螺纹钎焊管接头进行了10－350℃的热循环处理，对比分析了热循环前后管接头性能的变化，用金相分析方法检测了管接头中各组元微观组织的变化。结果表明，5100次的热循环处理没有对管接头的性能赞成损伤。反而，热循环处理可以使管接头中钛合金由粗大针状组织转变为等轴细晶粒，为钛合金／不锈钢螺纹钎焊管接头在专用装置中的使用提供了技术参考。