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擦拭-显色法快速测定日用陶瓷中铅溶出量的探讨
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作者 刘建均 何苗苗 +1 位作者 崔秋桃 喻零春 《佛山陶瓷》 CAS 2024年第8期64-66,96,共4页
以二甲酚橙钠盐(XO)为显色剂,探讨试纸擦拭-显色法快速测定日用陶瓷中铅的擦拭量,并实验分析了与国家标准GB/T3534-2002测定铅溶出量之间的线性关系。分别从显色剂选择、显色剂的浓度、显色剂溶液的pH值以及干扰试验等方面对显色方法进... 以二甲酚橙钠盐(XO)为显色剂,探讨试纸擦拭-显色法快速测定日用陶瓷中铅的擦拭量,并实验分析了与国家标准GB/T3534-2002测定铅溶出量之间的线性关系。分别从显色剂选择、显色剂的浓度、显色剂溶液的pH值以及干扰试验等方面对显色方法进行了优化。实验结果表明,当选择二甲酚橙为显色剂,显色剂的浓度为0.025%,采用醋酸-醋酸钠缓冲体系控制溶液pH为6.00,采用邻菲罗啉为掩蔽剂,该显色体系对铅的容量为300 mg/L,在浓度范围为0~50 mg/L呈良好的线性关系。试验了擦拭量与溶出量之间的关系,结果表明两者之间符合线性关系,曲线方程为y=0.108x-0.682相关系数r2=0.9993。 展开更多
关键词 日用陶瓷 显色法 铅溶出量 二甲酚橙钠盐
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Changes in Notified Incidence of Pulmonary Tuberculosis in China,2005–2020 被引量:5
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作者 DONG Zhe YAO Hong Yan +4 位作者 YU Shi Cheng HUANG Fei liu jian jun ZHAO Yan Lin WANG Qi Qi 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2023年第2期117-126,共10页
Objective To evaluate the trend of notified incidence of pulmonary tuberculosis(PTB)in China at different periods by population and region and to explore the effect of TB prevention and control in recent years.Methods... Objective To evaluate the trend of notified incidence of pulmonary tuberculosis(PTB)in China at different periods by population and region and to explore the effect of TB prevention and control in recent years.Methods Using pooled data on TB cases reported by the TB Information Management Reporting System(TBIMS)from 2005 to 2020,we calculated the annual percentage change(APC)using the Joinpoint regression model.Results From 2005 to 2020,a total of 16.2 million cases of PTB were reported in China,with an average notified incidence of 75.5 per 100,000 population.The age standardization rate(ASR)continued to decline from 116.9(/100,000)in 2005 to 47.6(/100,000)in 2020,with an average annual decrease of5.6%[APC=-5.6,95%confidence interval(CI):-7.0 to-4.2].The smallest decline occurred in2011–2018(APC=-3.4,95%CI:-4.6 to-2.3)and the largest decrease in 2018–2020(APC=-9.2,95%CI:-16.4 to-1.3).From 2005 to 2020,the ASR in males(159.8 per 100,000 in 2005,72.0 per 100,000 in2020)was higher than that in females(62.2 per 100,000 in 2005,32.3 per 100,000 in 2020),with an average annual decline of 6.0%for male and 4.9%for female.The average notified incidence was the highest among older adults(65 years and over)(182.3/100,000),with an average annual decline of6.4%;children(0–14 years)were the lowest(4.8/100,000),with an average annual decline of 7.3%,but a significant increase of 3.3%between 2014 and 2020(APC=3.3,95%CI:1.4 to 5.2);middle-aged(35–64years)decreased by 5.8%;and youth(15–34 years)decreased by an average annual rate of 4.2%.The average ASR in rural areas(81.3/100,000)is higher than that in urban areas(76.1/100,000).The average annual decline in rural areas was 4.5%and 6.3%in urban areas.South China had the highest average ASR(103.2/100,000),with an average annual decline of 5.9%,while North China had the lowest(56.5/100,000),with an average annual decline of 5.9%.The average ASR in the southwest was 95.3(/100,000),with the smallest annual decline(APC=-4.5,95%CI:-5.5 to-3.5);the average ASR in the Northwest China was 100.1(/100,000),with the largest annual decline(APC=-6.4,95%CI:-10.0 to-2.7);Central,Northeastern,and Eastern China declined by an average of 5.2%,6.2%,and 6.1%per year,respectively.Conclusions From 2005 to 2020,the notified incidence of PTB in China continued to decline,falling by55%.For high-risk groups such as males,older adults,high-burden areas in South,Southwest,and Northwest China,and rural regions,proactive screening should be strengthened to provide timely and effective anti-TB treatment and patient management services for confirmed cases.There is also a necessity to be vigilant about the upward trend of children in recent years,the specific reasons for which need to be further studied. 展开更多
关键词 TUBERCULOSIS Notified incidence Joinpoint regression model TRENDS China
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一种主从式动态重配置系统的软件架构技术 被引量:3
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作者 刘建军 郭秋丽 +1 位作者 邸海涛 孟海宁 《航空计算技术》 2018年第5期139-142,共4页
给出了一种针对主从式动态重配置系统的软件架构技术。解决了如何使软/硬件任务协调运行、数据交互;使用户不必为硬件重配置所导致的访问地址、中断等发生改变而重新修改、编译程序等工程实践的关键问题。描述了采用FPGA实现主从式动态... 给出了一种针对主从式动态重配置系统的软件架构技术。解决了如何使软/硬件任务协调运行、数据交互;使用户不必为硬件重配置所导致的访问地址、中断等发生改变而重新修改、编译程序等工程实践的关键问题。描述了采用FPGA实现主从式动态重配置的方式,详述了动态重配置的软件体系架构,重点给出了主从式动态重配置的流程控制设计;最后对系统重配置时间性能进行了详细分析。该技术的优点在于无需深度修改操作系统从而减少了工作量;充分利用操作系统的协调、管理硬件任务提高了FPGA的资源利用率;使用户不必为硬件重配置所导致改变更新应用程序。 展开更多
关键词 重配置 配置流程管理 硬件任务 软件体系架构
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一种策略可配置的IMA系统故障管理方法
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作者 刘建军 任晓瑞 +1 位作者 邸海涛 黄英兰 《航空计算技术》 2022年第3期78-81,共4页
随着综合化模块化航空电子(IMA)系统的综合化程度增加,其故障发生概率及类型增多,且IMA系统在功能升级、集成过程中,其故障管理方式不断迭代、管理难度增加。提出一种可灵活策略、可配置的故障管理方法。方法基于IMA平台构建于分区OS上... 随着综合化模块化航空电子(IMA)系统的综合化程度增加,其故障发生概率及类型增多,且IMA系统在功能升级、集成过程中,其故障管理方式不断迭代、管理难度增加。提出一种可灵活策略、可配置的故障管理方法。方法基于IMA平台构建于分区OS上,参考ASAAC标准管理层级,提出预先配置故障管理策略及多级权限的管理机制,解决了传统故障的过滤、诊断及处理方式与应用程序强耦合问题,以及由于故障处理而导致系统运行不确定性问题。所提方法满足IMA系统在不同机型不同阶段的故障管理需求,最终满足新一代IMA系统在移植性和确定性方面的要求,提高系统的安全性与可靠性。 展开更多
关键词 IMA 故障管理 可配置策略 多层级
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Joint Association of Metabolic Health and Obesity with Ten-Year Risk of Cardiovascular Disease among Chinese Adults 被引量:5
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作者 liu jun Ting YAO Hong Yan +4 位作者 YU Shi Cheng liu jian jun ZHU Guang Jin HAN Shao Mei XU Tao 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2022年第1期13-21,共9页
Objective This study aims to investigate the association of metabolic phenotypes that are jointly determined by body mass index(BMI)or fat mass percentage and metabolic health status with the tenyear risk of cardiovas... Objective This study aims to investigate the association of metabolic phenotypes that are jointly determined by body mass index(BMI)or fat mass percentage and metabolic health status with the tenyear risk of cardiovascular disease(CVD)among Chinese adults.Methods Data were obtained from a cross-sectional study.BMI and body fat mass percentage(FMP)combined with the metabolic status were used to define metabolic phenotypes.Multiple linear regression and logistic regression were used to examine the effects of metabolic phenotypes on CVD risk.Results A total of 13,239 adults aged 34-75 years were included in this study.Compared with the metabolically healthy non-obese(MHNO)phenotype,the metabolically unhealthy non-obese(MUNO)and metabolically unhealthy obese(MUO)phenotypes defined by BMI showed a higher CVD risk[odds ratio,OR(95% confidence interval,CI):2.34(1.89-2.89),3.45(2.50-4.75),respectively],after adjusting for the covariates.The MUNO and MUO phenotypes defined by FMP showed a higher CVD risk[OR(95%CI):2.31(1.85-2.88),2.63(1.98-3.48),respectively]than the MHNO phenotype.The metabolically healthy obese phenotype,regardless of being defined by BMI or FMP,showed no CVD risk compared with the MHNO phenotype.Conclusion General obesity without central obesity does not increase CVD risk in metabolically healthy individuals.FMP might be a more meaningful factor for the evaluation of the association of obesity with CVD risk.Obesity and metabolic status have a synergistic effect on CVD risk. 展开更多
关键词 Body mass index Fat mass OBESITY Metabolic health Metabolic phenotype Cardiovascular risk
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Association between Selenium in Soil and Diabetes in Chinese Residents Aged 35–74 Years:Results from the 2010 National Survey of Chronic Diseases and Behavioral Risk Factors Surveillance 被引量:4
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作者 WANG Qi Qi YU Shi Cheng +8 位作者 XU Cheng Dong liu jian jun LI Yuan Qiu ZHANG Man Hui LONG Xiao Juan liu Yun Ning BI Yu Fang ZHAO Wen Hua YAO Hong Yan 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2020年第4期260-268,共9页
Objective To explore the association between soil selenium levels and the risk of diabetes in Chinese adults aged 35–74 years.Methods Data for this study were derived from the China Chronic Diseases and Behavioral Ri... Objective To explore the association between soil selenium levels and the risk of diabetes in Chinese adults aged 35–74 years.Methods Data for this study were derived from the China Chronic Diseases and Behavioral Risk Factors Surveillance 2010 survey.Selenium concentrations in soil were obtained from the Atlas of Soil Environmental Background Values in China.A two-level binary logistic regression model was used to determine the association between soil selenium concentrations and the risk of diabetes,with participants nested within districts/counties.Results A total of 69,332 participants aged 35–74 years,from 158 districts/counties were included in the analysis.Concentrations of selenium in soil varied greatly across the 158 districts/counties,with a median concentration of 0.219 mg/kg(IQR:0.185–0.248).The results showed that both Quartile 1(0.119–0.185 mg/kg)and Quartile 4(0.249–0.344 mg/kg)groups were positively associated with diabetes compared to a soil selenium concentration of 0.186–0.219 mg/kg(Quartile 2),crude odds ratios(ORs)(95%CI)were 1.227(1.003–1.502)and 1.280(1.048–1.563).The P values were 0.045 and 0.013,for Quartile 1 and Quartile 4 groups,respectively.After adjusting for all confounding factors of interest,the Quartile 1 group became non-significant,and the Quartile 4 group had an adjusted OR(95%CI)of 1.203(1.018–1.421)relative to the reference group(Quartile 2),the P values was 0.030.No significant results were seen for the Quartile 3 group(0.220–0.248 mg/kg)compared to the reference group.Conclusion Excessive selenium concentrations in soil could increase the risk of diabetes among Chinese adults aged 35–74 years. 展开更多
关键词 SELENIUM DIABETES Odds ratio Behavioral risk factors Survey
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Developing a Subjective Evaluation Scale for Assessing the Built Environments of China’s Hygienic City Initiative 被引量:3
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作者 ZHENG Wen Jing YAO Hong Yan +1 位作者 liu jian jun YU Shi Cheng 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2021年第5期372-378,共7页
Objective To develop a preliminary subjective evaluation scale for assessing the built environments of China’s Hygienic City Initiative and to evaluate its reliability and validity.Methods The initial items of the sc... Objective To develop a preliminary subjective evaluation scale for assessing the built environments of China’s Hygienic City Initiative and to evaluate its reliability and validity.Methods The initial items of the scale were determined based on a review of policy documents and consultations with experts. The final items of the scale were confirmed through individual interviews with residents combined with the discretetrend method, critical ratio method, correlation coefficient method, and factor analysis method. Then, the dimensions of the scale were determined using exploratory factor analysis(EFA). The Cronbach’s α coefficient, split-half reliability coefficient, and confirmatory factor analysis(CFA) were used to assess the reliability and validity of the scale.Results A scale containing five dimensions with 22 items was established, including urban lifestyle,governance, basic functions, environmental sanitation, and amenities. The Cronbach’s α coefficient of the scale was 0.876, and the split-half reliability coefficient was 0.796. The CFA results indicate that each inspection level was within the standard limit.Conclusion The preliminarily subjective evaluation scale for assessing the built environments of China’s Hygienic City Initiative demonstrates a high level of reliability and validity. Additional empirical studies should be carried out to further verify the value of the scale in terms of practical application. 展开更多
关键词 Subjective built environment China’s Hygienic City Reliability and validity Scale
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Trichloroethylene Induces Biphasic Concentration-dependent Changes in Cell Proliferation and the Expression of SET-Associated Proteins in Human Hepatic L-02 Cells 被引量:1
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作者 HONG Wen Xu YE Jin Bo +10 位作者 CHEN Mou Tong YAN Yan ZHOU Gui Feng YANG Xi Fei YANG Liang REN Xiao Hu HUANG Hai Yan ZHOU Li HUANG Xin Feng ZHUANG Zhi Xiong liu jian jun 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2013年第7期618-621,共4页
Trichloroethylene (TCE) is a major pollutant that affects both occupational and general environments. The liver is an important target organ of TCEE. Substantial efforts and remarkable progress into understanding TC... Trichloroethylene (TCE) is a major pollutant that affects both occupational and general environments. The liver is an important target organ of TCEE. Substantial efforts and remarkable progress into understanding TCE cytotoxicity have been made in cultured liver cells. However, the molecular mechanisms by which TCE induces hepatotoxicity are not well understood. SET (also known as protein phosphatase 2A inhibitor, 12PP2A, or template-activating factor-I, TAF-D is a nuclear protein that regulates histone modification, gene transcription, DNA replication, nucleosome assembly, 展开更多
关键词 SET As TCE Trichloroethylene Induces Biphasic Concentration-dependent Changes in Cell Proliferation and the Expression of SET-Associated Proteins in Human Hepatic L-02 Cells
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Influence of Built Environment in Hygienic City in China on Self-rated Health of Residents
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作者 ZHENG Wen Jing QI Xiao +3 位作者 YAO Hong Yan liu jian jun YU Shi Cheng ZHANG Tao 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2022年第12期1126-1132,共7页
Objective To assess the subjective perception of residents on the built environment in hygienic cities and its relation to the self-rated health(SRH)status of residents,providing a basis for a better promotion on cons... Objective To assess the subjective perception of residents on the built environment in hygienic cities and its relation to the self-rated health(SRH)status of residents,providing a basis for a better promotion on construction of health-supportive environments.Methods The online survey was adopted with the respondents recruited from residents living in Chaoyang District of Beijing in January 2021.With SRH level as the dependent variable,two-category logistic regression analysis was conducted to analyze the impact of the built environment in hygienic cities on the SRH status of residents.Results A total of 1,357 respondents were enrolled in this study.After controlling confounding factors,four aspects in the built environment in hygienic cities were detected remarkable influences on the SRH level of residents,including enough green space in the living area[odds ratio(OR)=1.395,95%confidence interval(95%CI):1.055–1.845],clean and hygienic living environment(OR=1.472,95%CI:1.107–1.956),residents’confidence in drinking water safety in the living area(OR=1.856,95%CI:1.354–2.544)and residents’confidence in food safety in the living area(OR=1.405,95%CI:1.027–1.921).Conclusion Regarding city construction,the government should focus more on the subjective perception of residents on built environments to build a supportive environment benefiting the health of residents. 展开更多
关键词 Hygienic city Built environment Self-rated health
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磁芯绕线方式对电流传感器带宽性能的影响研究
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作者 郑华雄 朱方梁 +3 位作者 刘建军 周俊 刘家豪 吕阳 《电子设计工程》 2020年第9期150-153,共4页
研究了磁芯线圈绕线方式对电流传感器交流带宽范围的影响,试验验证多段绕线能有效降低线圈的分布电容(C),提高线圈的谐振频率(f0),从而提升电流传感器的带宽性能。试验样品线圈单段绕线时f0仅为21 kHz,C为216 pF,此时传感器的带宽不超过... 研究了磁芯线圈绕线方式对电流传感器交流带宽范围的影响,试验验证多段绕线能有效降低线圈的分布电容(C),提高线圈的谐振频率(f0),从而提升电流传感器的带宽性能。试验样品线圈单段绕线时f0仅为21 kHz,C为216 pF,此时传感器的带宽不超过200 kHz;双段绕线时线圈f0提高到72 kHz,C显著减小到36 pF,带宽可以达到600 kHz;三段绕线时线圈的f0为95 kHz,C进一步减小为19 pF,带宽进一步增加至800 kHz,且输出波形仍没有明显的失真和畸变。同时,通过探讨几种减小线圈分布电容的措施,为传感器磁芯绕线的设计提供了更丰富的改进思路和优化方案。 展开更多
关键词 电流传感器 交流带宽 线圈绕线 分布电容 谐振频率
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