淮北台FSQ型与JB型倾斜仪观测资料的对比分析

本文分析了淮北台FSQ仪和JB仪的观测数据,结合降雨资料和故障率进行对比,得到前者的长期稳定性以及观测资料内在质量优于后者,频响特性有所不同,故障率高于JB仪。结果对仪器性能分析和观测数据使用具有参考意义。     

Effect of environmental factors on the complexation of iron and humic acid

A method of size exclusion chromatography coupled with ultraviolet spectrophotometry and off-line graphite furnace atomic absorption spectrometry was developed to assess the complexation properties of iron (Fe) and humic acid (HA) in a water environment. The factors affecting the complexation of Fe and HA, such as ionic strength, pH, temperature and UV radiation, were investigated. The Fe-HA complex residence time was also studied. Experimental results showed that pH could influence the deprotonation of HA and hydrolysis of Fe, and thus affected the complexation of Fe and HA. The complexation was greatly disrupted by the presence of NaCl. Temperature had some influence on the complexation. The yield of Fe-HA complexes showed a small decrease at high levels of UV radiation, but the effect of UV radiation on Fe-HA complex formation at natural levels could be neglected. It took about 10 hr for the complexation to reach equilibrium, and the Fe-HA complex residence time was about 20 hr. Complexation of Fe and HA reached a maximum level under the conditions of pH 6, very low ionic strength, in the dark and at a water temperature of about 25°C, for 10 hr. It was suggested that the Fe-HA complex could form mainly in freshwater bodies and reach high levels in the warm season with mild sunlight radiation. With changing environmental parameters, such as at lower temperature in winter or higher pH and ionic strength in an estuary, the concentration of the Fe-HA complex would decrease.     

Prediction of per capita water consumption for 31 regions in China

Environmental Science and Pollution Research - Considering the shortage of per capita water resources in China, the paper established a fractional order accumulated grey prediction model (FGM(1,1))...     

Reactions to psychological contract breach: a dual perspective

This study examined reactions to psychological contract breach from two separate perspectives, that is, employee's reactions to perceptions of employer breach and supervisor's reactions to perceptions of employee breach of the psychological contract. In addition to the main effects, we also hypothesized that the benevolence (or kindness) of the supervisor and the traditional values (or respect for authority) of the employee would attenuate the negative effects of psychological contract breach. We tested these hypotheses with a sample of 273 supervisor‐subordinate dyads from the People's Republic of China. The results showed that employer breach correlated negatively with employee outcomes of organizational commitment (OC), organizational citizenship behavior (OCB), and work performance, but this negative relationship was weaker for employees with traditional values. The results also demonstrated that employee breach correlated negatively with responses from the supervisor, in terms of the mentoring provided to the employee and the leader‐member exchange (LMX) quality. However, more benevolent supervisors reacted less negatively in terms of the mentoring than did the less benevolent supervisors. Implications for future research are offered. Copyright © 2007 John Wiley & Sons, Ltd.     

表面活性剂对极性有机物在沉积物上吸附的影响

研究了苯酚、苯胺和对硝基苯酚在沉积物-十二烷基苯磺酸钠(SDBS)体系中的分配特性.结果表明200mg/L和1200mg/L的SDBS存在下,苯胺和对硝基苯酚的沉积物-水分配系数均增大,分配作用的增大倍数与有机物的K_ow呈正相关;苯酚的分配系数则因表面活性剂存在浓度的不同分别增大和减小.十二烷基硫酸钠(SDS)、Triton X-100(TX100)和Brij30存在下,苯酚等温吸附实验表明:表面活性剂浓度约低于其临界胶束浓度(CMC)时,苯酚的吸附量增大;表面活性剂浓度约高于其CMC时,苯酚的吸附量比纯水中的吸附量小.     

测震单台数字化分析软件的使用技巧

着重叙述了测震单台数字化分析软件SSDP、NNVSIAS的系统设置及使用技巧 ,并就工作中出现的一些问题给出具体的解决办法 ,特别对NNVSIAS在震相分析中的正确使用、震源对话框的恰当运用给出了详细的说明。     

电梯制动器机械装置提起（或释放）验证的研究

为确保电梯制动器检测开关能够准确检测电梯制动器机械装置提起（或释放）的异常,消除异常造成的危险情况,结合电梯制动器的型式和检测开关的动作原理,对各种检测开关接线方式进行分析,针对制动器的型式提出了合理的制动器检测开关接线方式。研究结果表明:直压式制动器可用1个通断状态的检测开关对其机械装置的提起（或释放）进行验证,但应在电梯的主板上设置2个检测点;杠杆式鼓式制动器应用具备2个通断状态的检测开关对其机械装置的提起（或释放）进行验证,且应采用常开并联或常闭串联的方式检测制动器机械装置的释放,采用常闭并联和常开串联的方式检测制动器机械装置的提起。     

Job engagement,perceived organizational support,high‐performance human resource practices,and cultural value orientations: A cross‐level investigation

Drawing on social exchange theory, we developed and tested a cross‐level model of organizational‐level predictors of job engagement. Specifically, we examined the impact of high‐performance human resource (HR) practices on employee engagement and work outcomes. Based on a sample of 605 employees, their immediate supervisors, and HR managers from 130 companies, our results indicated that high‐performance HR practices were directly related to job engagement as well as indirectly related through employees' perceived organizational support. In turn, job engagement was positively related to in‐role performance and negatively related to intent to quit. Culture was found to act as a critical contextual factor, as our results also revealed that the relationship between HR practices and perceived organizational support was stronger when collectivism was high and when power distance orientation was low. Overall, the findings shed new light on the processes and conditions through which employee work‐related outcomes are enhanced owing to high‐performance HR practices. Copyright © 2015 John Wiley & Sons, Ltd.     

检测致畸物的gfp基因工程菌的构建

RecA与UvrA是细胞SOS系统中重要的修复蛋白，在细胞DNA损伤后诱导表达．将报告基因绿色荧光蛋白基因（gfpmut3a）分别置于recA和uvrA启动子调控下，构建成质粒pRecAgfp和pUvrAgfp，并转化E．coli DH5α，构建成检测菌株ERS101和EUS101．试验发现，菌株ERS101和EUS101在致畸物吖啶橙处理后，GFP的表达量增高，菌悬液经507nm的蓝光激发后产生的绿色荧光明显增强，且与吖啶橙的浓度具有一定的相关性，即使在0．5μg mL^-1的吖啶橙诱导下也能检测到荧光增强效应．对硝基酚等多种致畸物处理后的检测菌株均有荧光增强效应．图4表1参9