Algorithm of information hiding based on ICA for image

独立分量分析(ICA)是一种基于高阶统计量的信号分析方法,它可以找到隐含在数据中的独立分量,已广泛应用于信号处理领域。信息隐藏是一种新兴的技术,其目的在于将秘密信息隐藏于另一非机密信息中。本文提出一种新的信息隐藏技术,即将ArnOld置乱后的秘密图像嵌入到载体图像中,再利用ICA算法从中提取出秘密图像。仿真结果表明该算法有效可行。Independent Component Analysis(ICA)was widely used in signal processing,which is a signal analysis method based on signal's high order cumulants,it can find out the latent independent components in data.Information hiding technology is a new method in information processing;the hiding information is embed in public information.This paper introduces an algorithm based on ICA for information technology.This paper embeds the cryptogrammic hiding image in public image,then using ICA algorithm to abstract the hiding image.The results of emulation indicate this algorithm is available and feasible

Photosynthetic responses to Solar UV radiation of Gracilaria lemaneiformis cultured under different temperatures and CO_2 concentrations

为了研究不同温度及CO2浓度下培养的大型海藻对紫外辐射的生理学响应,选取龙须菜(grACIlArIA lEMAnEIfOrMIS)作为实验材料。实验设置两个温度梯度(20℃和24℃),两种CO2浓度(390μl/l和1000μl/l)以及3种辐射处理,即可见光(PAr)处理(滤除紫外线A(uV-A)、紫外线b(uV-b),400—700 nM)、可见光加紫外线A(PA)处理(滤除uV-b,320—700nM)、PAb处理(全波长辐射280—700 nM)。结果表明,酸化、升温以及紫外辐射处理都未影响大型经济红藻龙须菜的叶绿素A和类胡萝卜素的含量。然而紫外辐射处理显著降低了龙须菜的有效光化学效率,其抑制水平在酸化处理的藻体中更为显著,并且随着温度的上升而进一步加剧;酸化与温度耦合使藻体对紫外辐射的敏感性增加,导致其较低的修复速率以及较高的损伤速率。The marine red macroalga Gracilaria lemaneiformis( Bory) Weber-van Bosse( Gigartinales,Rhodophyta) is an economically important species for cultivation in China.The cultivation of this species has been extensively spread which could be found in both northern and southern parts of China.This species could support as food resources for both human beings and aquaculture,and could also be commonly used in agar industry and biofuel production.The growth condition of G.lemaneiformis in natural environment varied frequently( especially the temperature,light intensity and quality,pCO2),which would potentially affect the physiology and photosynthetic production.Though the physiological and ecological effects induced by these environmental variations have been extensively concerned and studied,multi-factor coupling effects to marine macroalgae are still less documented up to now.To study the physiological responses of G.lemaneiformis to multiple stressors of ocean acidification,rising temperature and Ultraviolet( UV) radiation,the thalli of G.lemaneiformis cultured under different temperature( 20 ℃ as control,and high temperature group where it was increased by 4 ℃ to 24 ℃) and different CO2concentrations( ambient atmosphere CO2concentration,390 μL / L,and elevated CO2concentration set at1000 μL / L which expected attain in the end of this century according to IPCC report of A1F1 scenario) for two weeks,and then the algae were treated with three levels of radiations( Photosynthetically active radiation,PAR,400—700 nm;Photosynthetically active radiation+Ultraviolet A,PA,320—700 nm; Photosynthetically active radiation +Ultraviolet A +Ultraviolet B,PAB,280—700 nm) respectively,in the short-period.The photosynthetic pigments and chlorophyll fluorescene characteristics of the thalli of G.lemaneiformis were determined.The results showed that ocean acidification,rising temperature and UV irradiance alone did not affect the concentrations of chlorophyll a and carotenoid of G.lemaneiformis,and also no interactive effects were found among the treatments.Elevated CO2in culture generally did not have a significant effect on the value of maximum relative electron transport rates( rETR max).Temperature had no effect on the photosynthetic light-use efficiencies for thalli of G.lemaneiformis.However,exposure to UV radiation strong reduced the values of light-use efficiencies.Moreover,exposure of UV radiation significantly lowered the effective quantum yield in both G.lemaneiformis thalli grown 20 and 24 ℃,with the inhibition rate being more pronounced in the algae grown under high CO2condition together with increased temperature than the algae grown at control conditions( ambient CO2concentration and 20 ℃).Combine effects of ocean acidification and rising temperature enhanced the sensitivity of G.lemaneiformis to UV radiation,which could be reflected by the increased damage rate( k),decreased repair rate( r),and finally decreased ratio of repair to damage( r / k) in the thalli grown at high CO2concentration together with increased temperature.Taken together,we proposed that under the background of global change,intensified UV radiation( ozone hole continue exist),increased surface seawater temperature and enhanced ocean CO2absorption( ocean acidification) will synergistically exert negative effects on photosynthetic performance of G.lemaneiformis,and could thereby potentially decrease the yield and affect the aquaculture of this species.国家海洋863项目(2012AA10A411); 国家自然科学基金(41106093); 科技部农业科技成果转化资金项目(2012GB2E000340

Blind caption watermarking scheme based on ICA and DCT

标注水印为数字多媒体的便捷使用提供了一种新的途径。提出了1种结合独立分量分析(ICA)和离散余弦变换(dCT)的数字图像标注水印盲提取算法。该算法先将载体图像重采样成2个极为相似的子图,再分别将其分解成互不重叠的8x8子块,并进行离散余弦变换,接着将经过置乱后的水印嵌入到余弦变换的中频系数上,最后进行逆余弦变换得到嵌有水印的图像。采用ICA技术进行水印提取。实验表明,该算法有效可行。Caption watermarking is a new convenient way to use the digital multimedia.A blind scheme of digital image caption watermarking based on the independent component analysis(ICA) and discrete cosine transform(DCT) is proposed.Firstly,the cover image is sampled into two very similar sub-images.Secondly,the sub-images are decomposed into non-overlapping 8×8 blocks.Thirdly,these blocks are transformed into discrete cosine domain.Then the watermark is embedded into its middle frequency coefficient which has been rearranged by Scramble before embedded.Finally,we get image which is embed watermark by IDCT.It use the technique of ICA when the watermark is extracted.The results of emulation indicate this algorithm is available and feasible.福建省自然科学基金(2009J01301)资

Adaptive Blind Watermarking Algorithm Based on ICA and DWT

为了使数字水印具有较强的鲁棒性和不可见性,提出一种基于独立分量分析(ICA)和离散小波变换(dWT)的自适应鲁棒性盲水印算法.该算法先将载体图像进行小波变换,然后将原始水印进行平铺和置乱,再根据噪声可见函数(nVf)的视觉掩蔽作用,将其自适应地嵌入到载体图像小波变换域的低频系数上,最后利用ICA技术实现了水印盲提取.实验结果表明,该算法的水印不可见性较好,且可抵抗多种常见水印攻击,其中对JPEg压缩、尺度缩放等攻击的鲁棒性较突出,可应用于图像的版权保护.In order to enhance the robustness and invisibility of digital watermarking,a new adaptive watermarking algorithm based on independent component analysis(ICA) and discrete wavelet transform(DWT) is proposed.The algorithm firstly decomposes the image into wavelet domain.Then the watermark is adaptive embedded into its low frequency coefficient,under the visual mask of noise visibility function(NVF),which has been rearranged by tiling extended and scramble before embedded.It realizes blind extraction by ICA.Experimental results show that the algorithm has good transparency and better robustness,especially in JPEG compression and resizing scale attacks.It can be applicable for digital image copyright protection.福建省自然科学基金项目(2010J01210

Asymmetric Transfer Hydrogenation of Ketones Catalyzed by Chiral Carbonyl Iron Systems

手性羰基铁络合物很少被用于芳香酮的不对称氢转移氢化 .利用不同的羰基铁络合物与手性双胺双膦配体现场络合 ,形成手性胺膦铁催化体系 .考察了它们对多种芳香酮的不对称氢转移催化氢化性能 .结果表明 ,三核的手性胺膦铁簇合物是催化芳香酮不对称氢转移氢化的较好体系 .当用三核的铁簇合物 [Et3 NH] + [HFe3 (CO) 11] -体系催化 1,1 二苯基丙酮的氢化时 ,最高可获得 98%的对映选择性 .通过现场红外光谱测定 ,揣测羰基铁簇合物Fe3 (CO) 12 在催化反应过程中保持三核的簇合物的簇骼不变 .Chiral carbonyl iron systems have seldom been used in asymmetric transfer hydrogenation of aromatic ketones. In this study, new chiral iron catalytic systems were synthesized in situ from different carbonyl iron complexes with chiral diaminodiphosphine ligands, respectively. These catalytic systems have been used for the asymmetric transfer hydrogenation of various aromatic ketones under mild conditions. The results indicated that trinuclear iron complexes were the best systems for the reactions. When the [Et 3NH]+[HFe 3(CO) 11]- as catalyst was used for asymmetric reduction of 1,1-diphenylacetone, high enantioselectivity up to 98% was achieved. Monitoring the reaction in situ by infrared spectroscopy, it could be conjectured that the carbonyl iron cluster Fe 3(CO) 12 kept its trinuclear skeleton unchanged during the catalytic reaction.国家自然科学基金 (No.2 0 3730 56);; 福建省科技厅重大科技项目 (No.2 0 0 2F0 1 6);; 福建省厦门市科技局重大科技项目 (No .350 2Z2 0 0 2 1 0 4 4 )资

Effect of Ag loading on soot oxidation for Ag/Ce_(0.75)Zr_(0.25)O_2 catalysts

开发低温下高催化活性的柴油机碳烟颗粒燃烧催化剂是当前环境催化领域的热点问题。利用共沉淀的方法制备了用于碳烟催化燃烧反应的Ag/Ce_(0.75); Zr_(0.25)O_2催化剂。活性评价结果表明,相对于Ce_(0.75)Zr_(0.25)O_2催化剂,Ag的引入可显著降低碳烟催化燃烧温度。; 而且,Ag的负载量存在一个最佳值。以XRD、in-situ; XRD、BET、TPR等表征手段探究了该系列催化剂结构性质及其变化产生的影响。结果表明,Ag与Ce物种间的相互作用可显著降低催化剂(特别是CeO; _2表面氧)的还原温度。该相互作用使Ag/Ce_(0.75)Zr_(0.25)O_2催化剂在一定温度下(>200℃)就表现出Ag+的性质。这些性; 质与该催化剂具有较高的碳烟氧化活性相关。而且,该催化剂也表现出良好的稳定性。It is still important to develop soot oxidation catalysts with excellent; activity under low temperature. Ag/Ce_(0.75)Zr_(0.25)O_2 was synthesized; via coprecipitation method for soot oxidation. Compared with the; catalytic performance of Ce_(0.75)Zr_(0.25)O_2, the introduction of Ag; can lead to the decrease of soot-ignition temperature. Moreover, there; is an optimal Ag loading. Subsequently, several methods such as XRD,; in-situ XRD, BET, TPR were used to characterize the physicochemical; properties of Ag-based catalysts. The results showed that the; introduction of Ag resulted in decreasing the reduction temperature of; surface oxygen species, being due to the interaction of Ag and Ce. The; interaction also brings about the occurrence of Ag~+ nature. And the; feature is linked with the outstanding activity of soot oxidation for; Ag-based catalyst. Furthermore, the Ag-based catalyst possessed fairly; good stability in soot oxidation.国家自然科学基金项目; 中央高校基本科研业务费专项资金项

Development and application of CK-MB specific monoclonal antibodies

本研究拟建立肌酸激酶同工酶MB(CK-MB)特异性单克隆抗体(mAb)的研制方法,对抗CK-MB单抗进行评价分类及性质鉴定,并初步建立CK-MB; 定量检测试剂。以CK-MB抗原免疫BALB/c小鼠,利用常规单抗制备技术,使用间接和捕获ELISA差异筛选法筛选单抗。利用肌酸激酶同工酶(CK-; MM/BB/MB)抗原对所制备单抗的抗原识别表位进行鉴定,另通过免疫印迹法及合成CK-MM、CK-BB差异性的线性表位肽鉴定对所制备的单抗进行评; 价分类。使用双抗体夹心ELISA方法筛选检测CK-MB抗原的配对mAb,并初步建立CK-MB定量检测试剂。使用74例临床标本初步评价该试剂与罗氏; 试剂的检测一致性。最终,我们成功筛选到22株稳定分泌抗CK-MB抗体的杂交瘤细胞株,这些单抗可以分为线性、偏构象的CK-MB和CK-MM或者CK; -BB交叉的单抗以及与CK-MB特异反应的偏构象型单抗,并使用偏构象型单抗研制出CK-MB定量检测试剂,该试剂与罗氏试剂相关系数r达到0.930; 9。综上所述,本研究建立了研制CK-MB偏构象型特异性单抗的筛选方法,通过对所筛选的单抗进行分析鉴定并建立了CK-MB定量检测试剂,与罗氏试剂检; 测结果符合率高。The aim of this study is to develop creatine kinase isoenzyme MB (CK-MB); specific monoclonal antibodies (mAb), and characterize the monoclonal; antibody and further development of quantitative detection assay for; CK-MB. The BALB/c mice were immunized with purchased CK-MB antigen, then; monoclonal antibodies were prepared according to conventional hybridoma; technique and screened by indirect and capture ELISA method. To identify; the epitopes and evaluate the classification, purchased creatine kinase; isoenzyme MB (CK-MM/BB/MB) antigen was used to identify the epitopes,; with immunoblotting and synthetic CK-MM and CK-BB in different linear; epitope. A double antibody sandwich ELISA was applied to screen the mAb; pairs for CK-MB detection, and the quantitative detection assay for; CK-MB was developed. We used 74 cases of clinical specimens for; comparison of our assay with Roche's CK-MB assay. We successfully; developed 22 strains of hybridoms against CK-MB, these mAbs can be; divided into linear, partial conformational CK-MB, CK-MM or CK-BB cross; monoclonal antibody and CK-MB specific reaction with partial; conformational monoclonal antibody, and CK-MB quantitative detection; assay was developed by using partial conformational monoclonal antibody.; The correlation coefficient factor r of our reagent and Roche's was; 0.930 9. This study established a screening method for CK-MB partial; conformational specific monoclonal antibody, and these monoclonal; antibodies were analyzed and an established quantitative detection assay; was developed. The new assay had a high concordance with Roche's.厦门市科技计

福州市2010年甲型H1N1流感病毒分离株血凝素基因分子进化分析

目的了解福州市2010年甲型Hl N1流感病毒HA基因的突变和分子进化。方法采用RT-PCR技术扩增流感病毒A/Fuzhou/2/2010(H1N1)血凝素HA基因,测定核苷酸序列,用Clus-talX 1.83软件进行序列比对,用Bi-oedit软件的Clusta W程序进行序列同源性分析,用Mega 5.0软件以邻位相连算法(NJ)构建系统进化树。结果福州市2010年甲型Hl N1流感分离株A/Fuzhou/2/2010(H1N1)与福州市2009年首例甲型Hl N1流感病毒株HA基因同源性为98.9%,与疫苗参考株A/California/07/2009 HA基因同源性为98.5%;HA1区段有11个位点发生改变。结论福州市2010年甲型Hl N1流感病毒血凝素虽然个别氨基酸位点发生了突变,但在抗原决定簇位点的氨基酸并没有发生变化,未出现具有显著意义的抗原漂移

水蒸气改性H-FER分子筛在催化丁烯异构化反应中的应用

为了进一步提高FER分子筛的催化性能及稳定性,以水蒸气对H-FER分子筛进行改性处理。结果表明,水蒸气处理可以有效调变对H-FER分子筛孔结构和酸性,且保持其晶型相对完整。在水蒸气流量和处理温度分别为1.0 mL/min和370℃下,处理30 min后的H-FER具有最佳的催化性能。X射线衍射和氮气吸脱附等表征结果表明,较高的水蒸气处理温度（370～420℃）和较大的水蒸气流量（1～3 mL/min）可同时调控微孔和介孔的结构。另一方面,介孔与微孔的合理匹配对H-FER催化剂的稳定性影响处于主要地位,酸性变化的影响则处于次要地位。而且,对于丁烯、异丁烯等反应物/产物,H-FER分子筛的微孔孔径不宜过大（<1.45 nm）,dmicro/dmeso也不应大于0.19,即微介孔的连通性相当重要。中央高校基本科研业务费专项(20720170029

政府补贴对造纸企业出口的影响效应评估

基于造纸企业1998—2013年的非平衡面板数据构建动态面板模型,采用一般矩估计方法(GMM)克服内生性问题,明确政府补贴与造纸企业出口的因果关系,检验政府补贴对造纸企业出口扩张的影响效应,结果显示:当期的补贴收入对受补贴造纸企业出口未产生显著影响,而滞后一期的补贴收入对造纸企业当期出口具有显著的促进作用,该滞后效应出现在间断性出口企业中,但未在持续出口企业中出现,在一定程度上反映出政府补贴能激励造纸企业进入国际市场,但不是持续出口企业出口规模扩张的关键要素;滞后一期的补贴收入对纸浆及造纸企业的出口具有促进作用,但对纸及纸制品企业的出口无显著影响。国家自然科学基金项目(71703024)福建农林大学杰出青年科研人才计划项目(xjq201733);福建农林大学科技创新专项基金项目(KCXRC396A)大学生创新创业训练计划项目(201814046002