家用多功能生态仪的杀菌效果研究

研究家用多功能生态仪的杀菌效果。通过悬液定量杀灭试验、载体定量杀灭试验以及空气消毒试验研究生态仪对水体中、物体表面、空气中微生物的杀灭效果。采用悬液定量杀灭试验,作用30 min,该机对大肠杆菌、金黄色葡萄球菌、沙门氏菌、绿脓杆菌、白色念珠菌的杀菌率达均达到90%以上,黑曲霉仅32.56%;采用载体定量杀灭试验,作用30 min,该机对大肠杆菌、金黄色葡萄球菌、沙门氏菌、绿脓杆菌、白色念珠菌、黑曲霉的杀菌率均达到90%以上;采用空气消毒试验,作用60 min,在1.5 m3及10 m3试验舱中,该机对大肠杆菌、金黄色葡萄球菌、白色葡萄球菌的除菌率均达到90%以上,而在30 m3试验舱中,该机对3种菌的除菌率均在25%以下。

用阴道微生态检测仪诊断女性阴道炎的价值初探

目的:分析应用阴道微生态检测仪诊断女性阴道炎的价值。方法:选取医院2018年10月收治的776例疑似阴道炎患者,用阴道微生态检测仪诊断,以后续治疗分级为标准,检验阴道炎检出率、鉴别诊断正确率,不同致病菌数目。结果:金标准下共563例患者确诊阴道炎,包括细菌性阴道炎140例、念珠菌性阴道炎154例、滴虫性阴道炎12例、其他患者共157例。致病菌方面,革兰阳性小杆菌179例、革兰阴性小杆菌200例、革兰阳性球菌20例、革兰阴性球菌1例,其他共163例。阴道微生态检测仪检出阴道炎患者556例,与金标准相比,差异无统计学意义(P>0.05)。鉴别诊断中,确诊细菌性阴道炎140例、念珠菌性阴道炎152例、滴虫性阴道炎12例、其他患者共152例。与金标准相比,差异无统计学意义(P>0.05)。致病菌方面,革兰阳性小杆菌176例、革兰阴性小杆菌198例、革兰阳性球菌20例、革兰阴性球菌1例,其他共161例。与金标准相比,差异无统计学意义(P>0.05)。结论:疑似女性阴道炎患者,可应用阴道微生态检测仪进行诊断,检出率、鉴别诊断正确率、致病菌分析结果均较为理想。

Simulating Alpine Vegetation Net Primary Productivity by Remote Sensing in Qinghai Province,China

Primary productivity of ecosystem is important indicator about ecological assessment. Remote sensing technology has been used to monitor net primary productivity （NPP） of ecological system for several years. In this paper, the remotely sensed NPP simulation model of alpine vegetation in Qinghai Province of Tibet Plateau was set up based on the theory of light use efficiency. Firstly a new approach based on mixed pixels and Support Vector Machine （SVM） algorithm were used to correct simulated NPP values derived from Moderate Resolution Imaging Spectroradiometer （MODIS） data. Finally, spatial distribution and monthly variation characteristics of NPP in Qinghai Province detail. The result showed in 2006 were analyzed in that NPP of vegetation in Qinghai Province in 2006 ranged from o to 422 gC/m2/a and the average NPP was 151 gC/m2/a. NPP gradually increased from northwest to southeast. NPP of different vegetation types were obviously different. The average NPP of broad-leaved forest was the largest （314 gC/m2/a）, and sparse shrub was the smallest （101 gC/m2/a）. NPP in Qinghai Province significantly changed with seasonal variation. The accumulation of NPP was primarily in the period （from April to September） with better moist and heat conditions. In July, the average NPP of vegetation reached the maximum value （43 gC/m2）. In our model, the advantage of traditional LUE models was adopted, and our study fully considered typicalcharacteristics of alpine vegetation light use efficiency and environmental factors in the study area. Alpine vegetation is the most important ecological resource of Tibet Plateau, exactly monitoring its NPP value by remote sensing is an effective protection measure.

Potential Applications of X-ray Fluorescence Core Scanner in Elemental Analyses of the Muddy Sediments on the Coastal Shelves of China and in Ecological Study

Large areas of muddy sediments on the coastal shelves of China provide important samples for studying climate and ecological changes. Analysis of a large number of such samples, which is essential for systematic study on environmental information recorded in mud areas because of complicated sedimentary environment and variable sedimentary rate, requires a fast and economical method. In this study, we investigated the potential of X-ray fluorescence core scanner （XRFS）, a fast analytical instrument for measuring the elemental concentrations of muddy sediments, and observed a significant correlation between the element concentrations of muddy sediments determined by regular X-ray fluorescence spectrometer （XRF） and XRFS, respectively. The correlations are mainly determined by excitation energy of elements, but also influenced by solubility of element ions. Furthermore, we found a striking link between A1 concentrations and marine-originated organic carbon （MOC）, a proxy of marine primary productivity. This indicates that MOC is partly controlled by sedimentary characteristics. Therefore, XRFS method has a good potential in fast analysis of a large number of muddy sediment samples, and it can also be used to calibrate MOC in ecological study of coastal seas.

Path loss modelling and comparison based on the radio propagation measurement at 3.5GHz

Wideband IMT-Advanced mobile communication systems tend to operate in the high frequency bands due to a relatively large capacity available. Thus, Measurement and modelling methods of radio propaga- tion eharaeteristics are proposed for the field test of Chinese 4th generation （4G） trial system. The mea- surement system is established for 3.5GHz based on the sophistieated measurement instruments and the virtual instrument teehnology. The characteristic parameters of radio propagation sueh as path loss （PL） exponent and shadow fading standard deviation are extracted from measurement data, which result in the path loss model finally. The comparisons with other existing international models results validate our mea- surement in terms of path loss model. Based on the analysis of the existing extension model assumed for the microwave frequency at 3.5GHz, we find that the Stanford University Interim （SUI） model fits very well with the measurement result in the hotspot scenario, while the COST 231 model is closer to the mea- surement result in the suburban scenario. This result provides a measurement-based channel referenee for the development of the future IMT-Advanced systems in China.

Simulation logging experiment and interpretation model of array production logging measurements in a horizontal well

The distributions of local velocity and local phase holdup along the radial direction of pipes are complicated because of gravity differentiation,and the distribution of fluid velocity fi eld changes along the gravity direction in horizontal wells.Therefore,measuring the mixture flow and water holdup is difficult,resulting in poor interpretation accuracy of the production logging output profile.In this paper,oil–water two-phase flow dynamic simulation logging experiments in horizontal oil–water two-phase fl ow simulation wells were conducted using the Multiple Array Production Suite,which comprises a capacitance array tool(CAT)and a spinner array tool(SAT),and then the response characteristics of SAT and CAT in diff erent fl ow rates and water cut production conditions were studied.According to the response characteristics of CAT in diff erent water holdup ranges,interpolation imaging along the wellbore section determines the water holdup distribution,and then,the oil–water two-phase velocity fi eld in the fl ow section was reconstructed on the basis of the fl ow section water holdup distribution and the logging value of SAT and combined with the rheological equation of viscous fl uid,and the calculation method of the oil–water partial phase fl ow rate in the fl ow section was proposed.This new approach was applied in the experiment data calculations,and the results are basically consistent with the experimental data.The total fl ow rate and water holdup from the calculation are in agreement with the set values in the experiment,suggesting that the method has high accuracy.

Focus on Creating Teaching in Classroom, Cultivate Innovation Ability

Generative resources are mainly derived from the students （sometimes from the teachers）, which is dynamically generated in the students＇ practice, self-inquiry, and cooperative communication. Gifted children refer to a group of children who have such characteristics as high IQ （intelligence quotient）, strong creativity, and good personality. Their intelligence and capability have great potential for further development. As cognitive ability is one of the prominent characteristics of supernormal children, the lecturers can not only pay attention to teaching knowledge （facts teaching）, but also need provide proper opportunities for them to develop their aggressiveness, creativities, and challenges when teaching these children. Because students are active in thinking, in the classroom, students often have some unexpected ideas, that is, the generation of the classroom, in the face of this situation, teachers should be how to do？ A joke between students in the class, sparked the interest of a classmate, and then under the teachers＇ guidance, they invented a chemistry experiment instrument Ω type pipe, illustrated the importance of the teachers focus on creating teaching.