潮汐河段溶解质对泥沙分析影响研究

提出了潮汐河段泥沙分析进行溶解质改正的必要性 ,设计了检验溶解质含量及进行溶解质改正的方法 ,通过对实测水样的试验分析 ,得出了溶解质对泥沙分析影响的定量值 ,并给出了长江口河段进行溶解质改正的经验公式。     

荧光标记法检测活细胞内游离钙离子浓度的改进

改进了活细胞内游离钙离子浓度的测定方法，即用惰性基体纳米微球包埋荧光染料，将荧光纳米微球转运进细胞，用于细胞内游离钙离子浓度的实时测定。该方法与传统方法相比，染料不易泄漏，不会出现分室现象，不易光漂白，是一种非常有实用价值的测量活细胞内游离钙离子浓度的方法。     

工业大气环境中钢混结构的腐蚀原理和阴极保护

钢筋锈蚀和影响钢筋锈蚀速度的原因是多样的,针对含氯离子的工业大气环境对钢筋锈蚀的影响,阐述了发生腐蚀的机理和影响因素,分析了钢混结构裂缝产生的原因,探讨了电化学腐蚀与一般腐蚀的区别.在此基础上提出了现有防治措施的不足,并重点介绍了阴极保护的方法,同时也对钢筋锈蚀后的修补与应用进行了进一步的探讨.     

莫尔法测定炼厂含硫污水中氯离子的含量

研究了兰州石化公司炼油厂300万/年重催烟气脱硫装置中含硫污水中氯离子含量的测定方法,现在炼厂采用莫尔法测定含硫污水中氯离子含量,测得结果偏大。因此,在莫尔法的基础上设计制定了预处理步骤,将影响氯离子测定的杂质离子转化为无影响的硫酸根离子。并对该分析方法的准确度和精密度进行了考察,结果表明该方法的准确度和精密度较好,可及时准确的配合生产分析。     

珠玑移民故事的演变与良溪的“圣地化”

明代中后期以来,在珠江三角洲地域社会变迁与珠玑移民南迁故事的演绎进程中,良溪地方精英成功运用民间社会广泛认可和实践的文化策略来建构自身的祖先记忆与社区记忆。良溪的“圣地化”,是在充满文化竞争和文化权势博弈的过程中逐步发展、逐步为地域社会所广泛认可的文化创新的典范。     

简谈史诗

史诗是一种古老的民间叙事体长诗,记叙了各民族有关天地生成、人类起源的传说,以及关于民族迁徙、民族战争等重大事件,史诗是一个民族的开拓者们的创业史和远古的生活史。国外的史诗主要是英雄史诗,中国各民族的史诗,按传承和流布的地域、历史民族地理区域和经济文化类型可分为南北两大系统。北方民族主要以长篇英雄史诗见长,南方民族的史诗则以创世史诗为主,还有一些反映民族迁徙的史诗和部落战争的英雄史诗。     

Enabling Mg metal anodes rechargeable in conventional electrolytes by fast ionic transport interphase

Rechargeable magnesium batteries have received extensive attention as the Mg anodes possess twice the volumetric capacity of their lithium counterparts and are dendrite-free. However, Mg anodes suffer from surface passivation film in most glyme-based conventional electrolytes, leading to irreversible plating/stripping behavior of Mg. Here we report a facile and safe method to obtain a modified Mg metal anode with a Sn-based artificial layer via ion-exchange and alloying reactions. In the artificial coating layer, Mg₂Sn alloy composites offer a channel for fast ion transport and insulating MgCl₂/SnCl₂ bestows the necessary potential gradient to prevent deposition on the surface. Significant improved ion conductivity of the solid electrolyte interfaces and decreased overpotential of Mg symmetric cells in Mg(TFSI)₂/DME electrolyte are obtained. The coated Mg anodes can sustain a stable plating/stripping process over 4000 cycles at a high current density of 6 mA cm⁻². This finding provides an avenue to facilitate fast ion diffusion kinetics of Mg metal anodes in conventional electrolytes.     

瀚海考

原指贝加尔湖的瀚海,至盛唐后同时具三种含义:贝加尔湖、天池、沙漠.瀚海变为西部沙漠的代称,是武则天时期领瀚海都督一职的回纥部族短暂西迁留下的痕迹;随后瀚海军府在庭州设立,又使瀚海与西域相关联.元代称杭爱山为瀚海,是当地居民沿用唐瀚海都督府所在地名山.明清时瀚海为大篌沙漠的专称.     

Acculturation and academic achievement of rural to urban migrant youth: The role of school satisfaction and family closeness

China's 'tidal wave' of rural to urban migration has had a tremendous impact on the educational outcomes of its children. It remains unexplored how and when do migrant children’s experience of acculturation following arrival in the place of settlement influence their academic achievement. This study used a stratified cross-sectional sample of 2412 Chinese migrant children and adolescents aged 10–18 (Mean = 14, 45 % female) to investigate the role of school satisfaction and family closeness in the relationship between acculturation patterns and academic achievement. Acculturation patterns are derived from the bidimensional model proposed by Berry (2005). The results indicated that integration had a positive association with concurrent academic achievement. School satisfaction was a mediator between integration and academic achievement. Furthermore, the full mediation of school satisfaction was only supported when there was a high level of family closeness. Findings from this study underline the usefulness of the bi-dimensional model in understanding the individual differences in academic achievement and suggest greater attention to the cultural variations in interpersonal functioning at the family and school context.     

松嫩平原农区的经济出路──以黑龙江省双城市东新村为例

我国北方平原农区素以生产粮豆为主，经营十分单一，由于生产成本提高而粮豆价格偏低等诸多因素，农民长期收入水平低下。在市场经济条件下，平原农区的经济出路何在？本文通过典型实例调查，从平原农区的资源特点出发，认为“粮、多、企”协调发展是平原农区经济的可行出路，并提出了这种发展模式的改进途径。