解读“三个代表”重要思想——仅以时代背景、科学定位和精神实质为视角

“三个代表”是在科学判断世情、国情和党情尤其是党的历史方位的基础上提出的 ;是马克思主义中国化的最新成果 ,是党必须长期坚持的指导思想 ;全面贯彻“三个代表”重要思想关键在坚持与时俱进 ,核心在坚持党的先进性 ,本质在坚持执政为民。     

关注选治药剂中的有毒有害物质

选冶药剂中存在多种高关注度物(SVHC),它们是具有致癌、致畸及生殖毒性的物质(CMR),具有持久性、生物累积性、毒性物质(PBT),具有高持久、生物累积性物质(v Pv B)。此外选冶药剂中还有定义为新型污染物、POPs、内分泌污染物、冶炼中的二恶英全合成的前体物及大量的致癌及可能致癌的有毒有害物。但人们对其缺乏认知及法规监管。与SVHC、PBT等单一污染不同的是选冶药剂有毒有害物质污染与全球最大最持久的重金属污染的交叉、叠加与复合。     

TRIZ理论在粮食收集机设计中的应用

粮食摊晒和收集的机械化是农业发展的必然趋势,而想要实现收集与摊晒并存,效率与收净率兼顾的复杂功能,给机器的设计带来了很大的困难.采用TRIZ理论对粮食收集与晾晒过程中所存在的问题进行分析,通过转化通用参数寻找创新设计中存在的技术矛盾.根据冲突解决原理分析,解决了系统中矛盾冲突,对收集模块、行走模块及存储晾晒模块进行创新...     

应急物流体可靠性指标仿真

可靠性是评价应急物流体的重要指标之一。根据应急物流体构件的复杂多变性,提出与传统系统可靠性不同的计算方法,并将仿真预测引入应急物流体可靠性指标计算,为评价多态、多结构的应急物流体总体可靠性提供基本算法。     

减少悬浮物测定误差的方法分析

对悬浮物测定的各个易产生误差环节进行分析,并提出了减少误差的建议。     

"反应-吸附法"精制焦化柴油的研究

以物质A为反应物,白土为脱色物质,研究用反应-吸附的方法提高焦化柴油的质量。实验表明:精制油的色度、氧化安定性沉渣、实际胶质均可达到国标合格柴油的要求,焦化柴油中的硫、氮等杂原子化合物和不饱和烃类化合物等不安定组分得到有效脱除,柴油质量大大提高,精制柴油收率在98%以上。     

Examining common information technology addictions and their relationships with non-technology-related addictions

A number of novel problematic behaviors have emerged in the information technology era, and corresponding addictions have been proposed for some of these behaviors. Scholars have speculated that a common factor may underlie these information technology addictions, but this theoretical notion has yet to be tested empirically. The present study tested this notion and also investigated the relationships of information technology addictions with other behavioral addictions as well as substance addictions. We conducted an online survey in 1001 US adults (56% female; mean age = 35.0 years, range = 18–83). Two conceptual models were formulated and tested. Moreover, correlations of the information technology addictions with both problematic gambling and alcohol use disorder were examined. The confirmatory factor analysis showed that there was a common factor underlying various types of information technology addiction. In addition, problematic gambling was more strongly correlated with information technology addiction than alcohol use disorder was. Our findings are interpreted in light of a spectrum approach, which conceptualizes information technology addiction as a cluster of disorders comprising not only shared risk factors and symptoms but also distinct characteristics. The findings further reveal that information technology addiction is more similar to other behavioral addictions than substance-related addictions. Implications for researchers and practitioners are discussed.     

离子色谱用于标准物质硝酸根定值的方法研究

用离子色谱研究标准物质硝酸根定值的方法。采用阴离子分析柱IonPacAS19(2mmI.D.×250mm),抑制型电导检测,进样体积25μL,NaOH为等度淋洗液,通过正交设计L9(34)表安排试验,确定优化的色谱条件。NO3-的检出限是0.007mg/L,方法精密度RSD为0.36%,方法线性范围是1.0~100mg/L,样品平均加标回收率在94.2%~104%之间。利用校正曲线的稳定性检查,质控样可靠性检查和回收率检验证明该分析方法是可靠的。该方法简单、快速、灵敏、重复性好,已用于标准物质硝酸根的定值。     

Unsafe motor vehicle practices among substance-using college students

This study examines the relationship between substance use and behaviors that increase the risk for motor vehicle crashes and crash-related injuries. The investigation uses National College Health Risk Behavior Survey data collected in 1995 by the Centers for Disease Control and Prevention. These data are representative of 2- and 4-year undergraduate college students in private and public colleges and universities in the United States. Smokers, episodic heavy drinkers, marijuana users and users of illegal drugs in combination with alcohol were significantly more likely to drive after drinking alcohol and ride with a driver who had been drinking alcohol and significantly less likely to wear safety belts while driving or while riding in a car as a passenger. This study indicates that college students who are substance users are more likely to behave in a manner which increases their risk for motor vehicle crashes and motor vehicle crash injuries.     

Evaluation of a program to reduce motor-vehicle collisions among young adults in the county of Landes, France

The aim of this study was to evaluate the impact of a prevention program called “Atout-Route”, based on the concept of commitment. The program was implemented in March 2000, to reduce the number of drivers under the age of 25 years involved in motor-vehicle collisions in the county of Landes (southwestern France). Using data from the regional observatory of road safety, we defined a target and three control groups similar on age or location. We used Poisson and quasi-Poisson regression to estimate whether the observed evolution of motor-vehicle collisions, after the program was implemented, was different in the targeted group than in the three control groups. The number of motor-vehicle collisions decreased everywhere and in every age group. The effect of the prevention program was not statistically significant (relative risk = 0.89; 95% confidence interval 0.74–1.07). Our results are compatible with a positive effect of the program. The possible dilution of its effect by national road safety actions implemented since 2000, and our early assessment are possible reasons for the non-significant observation.