新媒体条件下大学生思想政治理论宣传的创新研究

新媒体的迅速发展以及应用,对大学生思想政治理论宣传的创新研究起到了十分重要的作用。在新媒体的条件下,我们要努力探索新的大学生思想政治理论宣传的方式,同时,进一步加强和改进新形势下的大学生思想政治教育。我们需要把握住新媒体技术给大学生思想政治教育带来的机遇和挑战,努力为加强大学生的思想政治理论宣传做出巨大的贡献,从而努力改变大学生获取信息的方式以及与人交流的方式等。     

新媒体环境下高校辅导员职业能力的提升

当今社会,新媒体作为一种新兴的媒体形态,潜移默化地改变着当代大学生的思维方式和行为方式,对大学生的思想认知和价值取向也产生了深远的影响.这种新形势、新变化,既给当下高校辅导员工作带来了前所未有的历史机遇,同时也提出了严峻的挑战.积极探索新媒体环境下辅导员职业能力提升的有效路径,无论对当下高校辅导员队伍建设、形象塑造、能力提升,还是对大学生思想政治教育时效性的提高,都具有理论和实践上的指导意义.     

媒体处理器视频哈夫曼解码快速算法

为了提高视频处理中哈夫曼解码的性能,从减少比特操作、提高处理器内存利用率的角度出发,设计了2种不同的数据结构进行哈夫曼码表的组织,提出了一种新的并行分步查表算法,对Ishii的并行查表法进行了改进.实验结果表明,采用新算法及其内存优化策略,以哈夫曼解码性能较少下降的代价,内存开销得到大幅降低.新算法比常用的分步查表算法的解码效率有较大提升,对MPEG系列、H.26X系列等视频压缩标准具有普适性.     

Open-cell polyvinylidene fluoride foams as carriers to promote biofilm growth for biological wastewater treatment

This article reports the design and fabrication of open-cell polyvinylidene fluoride (PVDF) foams as carriers that can promote biofilm growth and organic removal efficiency for biological wastewater treatment in attached growth bioreactors. Open-cell PVDF foams were fabricated by a manufacturing approach that integrated compression molding and particulate leaching. PVDF carriers were structured with two governing factors of leaching agent types (e.g., sodium chloride [NaCl] and sodium acetate [NaOAc]) and contents (e.g., 80 and 90 wt%). Open-cell PVDF foams possessed high porosity and high protected surface area (i.e., more than ×10 to ×20 of the areas of commercialized carriers), which promoted biofilm growth in these carriers. As a successful advantage, PVDF carriers used in the moving bed biofilm reactors (MBBR) were entirely covered by biofilm in both interior and exterior parts without clogging. This provides strong evidence of the bacterial compatibility of the fabricated open-cell PVDF foam carriers. Moreover, the specific morphology of the PVDF carriers in this article provided superior biofilm protection from the detachment in MBBR. Experimental results revealed that PVDF open-cell foams fabricated by 80 wt% of NaCl demonstrated higher mechanical strength with an organic removal efficiency of 77% ± 7% in the corresponding bioreactor containing them.     

LTNE条件下界面对流传热系数对部分填充多孔介质通道传热特性的影响

在多孔介质区考虑局部非热平衡,采用Brinkman-extended Darcy模型结合应力跳跃条件对部分填充多孔介质通道内流体传热特性进行分析。获得了各区域温度分布及Nusselt数解析解,并分析了各参数对温度及Nusselt数的影响。结果表明：界面对流传热系数H_s较小时,界面应力跳跃系数β和Darcy数Da的增加会减小流固两相间温差。而在高H_s下,Da减小也会减小两相温差。在Da、H_s和固流两相热导率之比K较大且空心率S（自由流体区高度与通道高度之比）和Biot数Bi较小时,流固两相间会在接近多孔介质区中部出现最大温差,而该最大温差会随着S增加和Da及H_s的减小向界面区移动。对于不同K与Bi,Nusselt数Nu与S的关系曲线存在不同的类型,与模型A（界面处多孔介质固相和流相根据各自温度梯度和热导率划分总热流）不同的是,采用模型C（界面处固相热流分配与自由流体区流相的热交换相关）所获得的Nu曲线类型与H_s有关。在K较小时,β对Nu的影响大于H_s对Nu的影响;而在K较大时,H_s对Nu的影响要远大于β对Nu的影响,且H_s增加会明显提高通道内的Nu。     

An investigation of chloride-substituted Schiff bases as corrosion inhibitors for steel

Polarization and impedance measurements were performed on steel in deaerated 5% HCl solution with and without Schiff base additives within the concentration range 1 × 10⁻⁴–5 × 10⁻³ mol/dm³. The Schiff base compounds used were salicylaldimine, R, N-(2-chlorophenyl)salicyaldimine, 2Cl-R, N-(3-chlorophenyl)salicyaldimine, 3Cl-R, and N-(4-chlorophenyl)salicyaldimine, 4Cl-R. It was found that when the concentration of the inhibitors were increased the inhibitor efficiencies, η, also increased with increasing surface coverage. The results indicated that the ortho-substituted (2Cl-R) compound had the highest inhibition efficiency. All the Schiff base additives studied obeyed the Langmuir isotherm.     

Ti衬底层对FePt颗粒膜的微结构和磁特性的影响

在室温下,应用对靶直流磁控溅射设备在普通玻璃基片上制备了FePt(30nm)/Ti(tnm)颗粒膜样品,随后,在真空中进行了原位退火.详细研究了Ti衬底层对FePt颗粒膜的微结构和磁特性的影响.X射线衍射图谱表明样品形成了较有序的L10织构,Ti和FePt形成了三元FePtTi合金.当Ti层厚度t=5 nm、退火温度Ta=500℃时,样品具有高度有序的L10织构、小的颗粒尺寸和优异的磁特性.矫顽力超过了6.7 kOe,饱和磁化强度为620emu/cc.并且具有较小的开关场分布.结果表明FePt/Ti颗粒膜系统可作为超高密度磁记录介质的候选者.     

4种不同金相组织的仿古铸铁在土壤中局部腐蚀行为的差异

为了加强铸铁文物的保护，采用动电位扫描极化、模拟闭塞电池、交流阻抗等电化学方法，以及光镜、扫描电镜等显微组织分析手段，研究了4种仿古铸铁在模拟土壤介质（0．06mol／L NaCl＋0．03mol／L Na2SO4＋0．01mol／L NaHCO3溶液）中的局部腐蚀行为，详细探讨了组织差异对仿古铸铁局部腐蚀的影响。结果表明：珠光体灰口铸铁的自腐蚀电位负移最为明显，在模拟土壤条件中裂纹和腐蚀孔洞相对其它几种仿古铸铁较多。在闭塞电池中，仿古铸铁的pH值下降，Cl^-和SO4^2-增加，仿古铸铁耐蚀性依次递减的顺序为白口铸铁、麻口铸铁、珠光体＋铁素体灰口铸铁、珠光体灰口铸铁。     

WELL-DISPERSED NANODIAMOND AQUEOUS SUSPENSIONS——PREPARATION,PROPERTIES AND APPLICATIONS

1　INTRODUCTIONAsitwassynthesizedundertheconditionofhightemperatureandhighpressure ,andowingtothecommoncharacteristicsoffinedimensionandhighsurfaceenergyofnanoscaledparticles ,nanodiamond (ND )preparedbydetonationexplosioncaneasilyformstrongaggregates WhenNDpowderwasaddedinaqueousmedia ,obviousaggregationandsedimentationcanbeobserved ,whichimpairsitscharacteristicsasananometerparticle ,andthushindereditsapplication Inthiscase ,stabledispersionofNDinaqueousmediaisofgreatimportance[1 4 ] …     

选矿厂细磨磨矿介质的选择及研究

介绍、分析研究了选矿厂细磨中的磨矿介质选择的方法。从磨矿介质的尺寸、形状、材质 3个方面 ,进行了理论研究和实验验证 ,提出了一个可行的方案。