一类推广的整数极小极大问题的求解算法

讨论了一类推广的整数极小极大问题，给出了问题最优解的充分必要条件，在此基础上给出了求解最优解的算法，最后，给出了一个数值例子。     

关于推广的线性规划问题的BP网络求解

推广的线性规划问题比常规线性规划问题有更广泛的实际应用背景．而求解线性规划问题的许多有效方法如单纯形法，Ｋａｒｍａｒｋａｒ’ｓ方法等却无法直接用于推广的线性规划问题的求解，注意到推广的线性规划问题等价于一个非线性映射，利用ＢＰ神经网络的本质并行性和高度非线性处理能力，该文提出了一类求解推广的线性规划问题的ＢＰ神经网络方法，它具有网络构建简单，求解精度高，计算量小等优点，实验结果表明其高效性．     

影响微生物絮凝剂产出的因素

通过测定不同培养条件下制备的微生物产生菌培养液对高岭土悬浊液的絮凝性能，探讨了培养基，培养时间和温度等因素对微生物絮凝剂产出的影响，研究表明察氏培养基比原用培养基更为经济实用的适宜培养时间在3－8d之间，适合温度为30度，与絮凝剂产生菌的生长相比，微生物絮凝剂的产生时间稍有些滞后。     

Demianski-Newman黑洞的热性质及广义Bekenstein-Smarr公式

对于Demianski-Newman(D-N）黑洞，同样存在在外观视界处温度为T＋的Hawking辐射和在内视界处温度为T－的Hawking吸收，其形式与Kerr-Nweman（K－N）黑洞相似，根据D－N黑洞中参数l的一些性质，得到了与参数l有关的广义Bekenstein-Smarr(B-S）公式，对比K－N黑洞的B－S公式，可以推测l－方面与转动效应有关，另一方面又有产生势场，可能是与自旋有关的某种荷。     

中国的软磁铁氧体产业

在过去的20多年里,软磁铁氧体的产量在中国以近乎平均每5年翻一番的速度增长.2007年中国软磁铁氧体的产量已经突破25万吨,占全球总产量的50%以上.中国已经毫无争议地成为全球软磁铁氧体最大生产国.由于市场的推动,中国软磁铁氧体的产量在可预见的将来仍然会保持较快的速度增长.与此同时,中国软磁铁氧体生产技术的持续进步,使中国在不远的将来也最具潜力成为全球软磁铁氧体材料及器件的研发中心.     

铁电极活性粉的制备及其高倍率放电性能的研究

采用无机合成技术，通入Ｏ２及滴加ＮａＯＨ溶液，加热硫酸亚铁与ＮＨ４ＮＯ３的混合溶液使部分二价铁被氧化成三价，沉淀物经过滤和干燥后，在氩气氛下６７０℃焙烧１ｈ得到铁电极活性粉．经Ｘ射线衍射分析，该活性粉的成分是单相四氧化三铁．利用该活性粉所制备的铁电极，在不添加任何添加剂的条件下，以１００ｍＡ／ｇ放电的容量为２４５．５ｍＡ·ｈ／ｇ．该电极的高倍率放电性能好，以１２０ｍＡ／ｇ放电的容量为２１６ｍＡ·ｈ／ｇ．     

用动力学法研究苯乙烯─丙烯酸共聚物的序列分布

用不同的方法合成了苯乙烯（st）─丙烯酸（AA）共聚物P(St－Co－AA)．用Fineman－Ross法求出了苯乙烯和丙烯酸单体的竞聚率．按Markov一级动力学模型，求出了共聚物的序列公布．     

数控加工干涉检验的新算法

提出一种干涉检验的新算法--点到曲面距离法.通过计算刀盘上刀尖轨迹圆上的任一点到理论曲面的距离来检验刀具与被加工曲面是否存在干涉且计算出干涉量的值,大大提高了计算效率.     

An efficient non-iterative algorithm to estimate the apparent diffusion coefficient of water molecules in the magnetic resonance diffusion imaging experiments

Many studies have shown that the magnetic resonance signal decay with an extend range of diffusion weighting(b-factor)is a bi-exponential attenuation in the diffusion-weighted magnetic resonance imaging experiments in vivo.Based on this feature and the two-compartmental model,we propose a twice-linear-fitting(TLF)algorithm to estimate the apparent diffusion coefficient(ADC)of the water molecules instead of the commonly used iterative Levenberg–Marquardt(LM)method.The TLF algorithm consists of two liner fitting steps to estimate the fast and the slow apparent diffusion coefficients and their sizes,respectively.It is unnecessary to guess the initial values in the whole fitting process.The time consumption of the TLF algorithm is much less than that of the iterative LM method.Moreover,the TLF algorithm may avoid the extraneous solutions,which often deteriorates the results of the LM method.Compared with the iterative fitting method,the TLF algorithm is a reliable and timeefficient approach to estimate the ADC of water molecules in vivo in magnetic resonance diffusion-weighted imaging experiments.     

Theoretical advances of the structures and catalytic activities of small-sized gold nanoclusters

Gold nanoclusters exhibit extraordinary catalytic activities,but the dominating factor is still unclear due to the complexity of the structures.In this review,we briefly summarized the recent theoretical progress on their structures and catalytic activities.Combining the experimental and theoretical efforts,the structures of small-sized gold clusters have been explored systematically.Based on the determined structures,factors that influence the catalytic capabilities of small-sized gold clusters(Au_(16)-Au_(35))are studied using CO oxidation asa probe.The preadsorption energies of CO and O_2are found strongly correlated with catalytic activities,which could be affected by the clusters'geometries,sizes,and charge distributions.In addition,the presence of water could significantly lower the activation energy barrier of O_2 dissociation to enhance the clusters'catalytic activities.