新型镍铝底层材料的组织和性能

研制了一种新型超细铝粉包覆的镍铝底层材料,考察了粉体材料的特征及其热喷涂性能。试验结果表明,与普通镍铝底层相比,新型镍铝粉末的包覆更加致密,均匀,流动性更好,热喷涂过程中粉末放热量更大,涂层组织更加细密,涂层的结合强度高达55 MPa以上

Fixed type burning apparatus

本发明公开一种固定式烧毁设备,包括炉体、供火系统、供风系统、自动出渣机构、进料装置冷却系统,其中炉体固定于地面,自动出渣机构安装在炉体底部,供火系统通过喷火管与炉体中部连接,炉体的上端分别设有进料装置和烟囱,所述冷却系统安装在进料装置处。具有操作简单、运行安全可靠,便于点火、出渣以及维修作业等特点

Growth-promoting EFFects of a Fructo-oligosaccharide Preparation on BiFidobacterium in Mice

用清洁级bAlb/C小鼠研究自制寡果糖（fOS）制剂对肠道内双歧杆菌的促生作用。结果表明，每天以50MgfOS给小鼠灌胃，其粪便中双歧杆菌数从第7天起比对照组和每天给5MgfOS的小鼠明显增加，并一直保持较高水平。停给fOS后动物粪便中双歧杆菌数并未立即下降。在臭氧环境中饲养的小鼠其肠道双歧杆菌数下降，而每天灌胃给予50MgfOS可使其肠道双歧杆菌基本恢复到正常水平。The growth - promoting eFFect of a Fructo -oligosaccharide preparation(FOS) on Bi- Fidobacterium in vino was studied in BALB/c mice.The BALB/c mice were given ig with 0, 5,or 50mg FOS daily For 21 days respectively.From the 7th day the Flora of B.adoles- centis in the Faeces of BALB/c mice given with FOS 50 mg/d were Found to be signiFicant- ly higher than those of the mice given with FOS 0 or 5 mg/d and maintained at such lev- els.They were not diminished immediately aFter the administration period.Besides, the Flora of B.adolescentis in the Faeces of BALB/c mice reared in O3 atmospheric environment were diminished, but improved signiFicantly when the mice were given ig with FOS 50 mg/d.The results indicated that FOS could promote the growth of BiFidobacterium in vi- vo.福建省自然科学基金!3967001

Screening of marine bacterial strain with immunoactive exopolysaccharide

从厦门海区潮间带的动植物体及底泥分离到的177株海洋细菌中筛选出一株高产胞外多糖的1202菌株.其产生的胞外多糖可显著地促进昆明种小鼠脾淋巴细胞IL 2(白介素 2)的合成,并对小鼠S180肉瘤具有较强的抑制作用.经初步分类鉴定,确定该菌株归属于土壤杆菌属(Agrobacteriumsp.).An exopolysaccharide-producing strain 1202 was obtained by screening 117 marinebacteria isolates, which were from the flora ,the fauna and the sediments in the intertidal zone of the Xiamen coast. The exopolysaccharides produced by the bacterial strain 1202 could stimulate interleukin 2 (IL-2) secretion from mouse spleen lymphocytes in vitro, and exhibit significant inhibitory effects on sarcoma 180 solid tumors in vivo. The strain 1202 was tentatively identifiedas a species of the genus Agrobacterium, based on its morphology, growth features, physiological and biochemical characteristics.国家自然科学基金资助项目(30070024

A Novel Metabolomic Data Scaling Method Based on K-L Divergence

在基于核磁共振(nMr)的代谢组学数据分析中,尺度缩放是关键的预处理步骤之一,其主要目的是通过调整数据的方差结构,改善后续的多变量统计分析的结果。从信息熵的角度出发,利用kullbACklEIblEr(k-l)散度来度量不同实验分组的生物样品的1 H nMr波谱数据的差异程度,并结合单位方差缩放法,提出一种基于k-l散度的尺度缩放方法。该方法先利用单位方差法将数据各变量的标准差调整到同一水平上,再利用k-l散度对各变量进行有监督地加权,增强重要变量、减弱无关变量。由于k-l散度是在概率分布的意义上度量数据间的差异程度,且对于高斯和非高斯分布的数据均适用,因此能更准确地度量不同实验分组样品的1 H nMr波谱数据的差异性,从而更有效地地对谱数据的重要变量进行识别和加权。人群尿液1 H nMr波谱数据的分析结果表明,基于k-l散度的尺度缩放方法能有效抑制噪声变量,同时很好地区分特征变量和非特征变量;提高主成分回归(PCr)模型的判别能力;改善偏最小二乘回归判别分析(PlS-dA)模型的解释能力、预测能力以及对特征代谢物的辨识能力。A new scaling method in the current study based on Kullback-Leibler(K-L)divergence is proposed for NMR metabolomic data.The proposed method(called K-L scaling)is a supervised scaling method as group information is incorporated in the scaling procedure.Notably,K-L divergence measures the difference between two different datasets by their probability distributions,it can be used for the analysis of data that either follows Gaussian or non-Gaussian distributions.In K-L scaling,all variables were first standardized to unit variance,then their variance was adjusted using Kullback-Leibler divergence to highlight the significant variables.K-L scaling can tell effectively the difference in spectral data points between two experimental groups,and then enhances the weights of biological-relevant variables,and at the same time reduces the weight of noise and uninformative variables.The developed method was applied to a 1 H-NMR metabolomic dataset acquired from human urine.Analysis results of the dataset showed that this new scaling method is efficient in suppressing the contribution of noise in the resulting multivariate model.In addition,it can increase the weights of important variables,and improve the interpretability and predictability of subsequent principal component regression(PCR)and partial least squares discriminant analysis(PLS-DA).Furthermore,the scaling method facilitated the identification of metabolic signatures.The current result suggested that the developed K-L scaling method may become a useful alternative for the preprocessing of NMR-based metabolomic data.国家自然科学基金项目(81371639;81201143); 中央高校基本科研业务费(2013121007)资

Suitable Culture Conditions for Exopolysaccharides Produced by Marine Bacterial Strain 1202

应用响应面法(ResponseSurfaceMethod,RSM)对海洋细菌1202菌株胞外多糖发酵培养基进行优化.结果表明,适宜的发酵培养基组成为:蔗糖4%,酵母膏0.05%,玉米浆1.5%,CaCO30.15%,KH2PO40.08%,MgSO4·7H2O0.05%,FeSO4·7H2O0.01%,NaCl0.1%,pH7.5.在装液量为50mL(500mL三角瓶),接种量5%时,于28℃摇瓶培养7d,胞外多糖的产量可达到8.3mg/mL,转化率为20.75%.The response surface method (RSM) was used to optimize the medium for production of exopolysaccharides by marine bacterium 1202. The optimal fermentation conditions were established with 5% inoculum size and 500 mL Erlenmeyer flask containing 50 mL medium, which consisted of 4% sucrose,1.5% corn steep liquor,0.05% yeast extract,0.15% CaCO3,0.05% MgSO4·7H2O,0.08% KH2PO4,0.01% FeSO4·7H2O,0.1% NaCl,pH7.5.The fermentation was carried out at 28℃ for 7 days on a rotary shaker.Under these conditions, the yield of exopolysaccharide reached 8.3 g/L,and the conversion rate of sucrose was 20.75%.国家"863"计划(2001AA620401);; 国家自然2100.651.30.25科学基金(30070024)资

Low-overhead smart power grid data aggregation processing system and method

本发明属于云计算与分布式神经网络技术领域，涉及一种基于分布式神经网络的低开销智能电网数据聚合方法，包括以下步骤：(1)终端设备特征提取；(2)局部数据汇集；(3)云端数据处理。本发明允许边缘设备进行快速的局部推断，大大减少了通信成本，降低了时间开销，同时，通过分布式计算，可以保证数据聚合中的隐私问题并提高了系统的容错能力