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Development trend of urban design in “digital age”: Pan-dimensionality and individual-ubiquity
《结构与土木工程前沿(英文)》 2021年 第15卷 第3期 页码 569-575 doi: 10.1007/s11709-021-0735-7
关键词: digital age urban design multiple objectives human-computer interaction pan-dimensionality individual-ubiquity
Cell-free systems in the new age of synthetic biology
Fernando Villarreal,Cheemeng Tan
《化学科学与工程前沿(英文)》 2017年 第11卷 第1期 页码 58-65 doi: 10.1007/s11705-017-1610-x
Opportunities and challenges for a Golden Age of chemical engineering
Phillip R. WESTMORELAND
《化学科学与工程前沿(英文)》 2014年 第8卷 第1期 页码 1-7 doi: 10.1007/s11705-014-1416-z
关键词: hydrocarbons biotechnology computation cyberinfrastructure manufacturing environmental
Age-related trends in genetic parameters for wood properties in
Chao SUN, Meng LAI, Shougong ZHANG, Xiaomei SUN
《农业科学与工程前沿(英文)》 2017年 第4卷 第4期 页码 482-492 doi: 10.15302/J-FASE-2017184
关键词: early selection genetic variation wood properties SilviScan Larix kaempferi
Epidemiological studies of women under age 30 infected with human papillomavirus
Zhihua LIU MD, Qing LI BM, Weihong LI BM,
《医学前沿(英文)》 2009年 第3卷 第4期 页码 459-462 doi: 10.1007/s11684-009-0084-8
关键词: cervical cancer human papilloma virus cervical intraepithelial neoplasia
Comparison of surgical indications for hysterectomy by age and approach in 4653 Chinese women
null
《医学前沿(英文)》 2014年 第8卷 第4期 页码 464-470 doi: 10.1007/s11684-014-0338-y
Approximately one million hysterectomies are performed each year in China. However, national data regarding the indications and the surgical approaches for hysterectomy are lacking. The aim of this study was to examine the surgical indications for hysterectomy in different age groups and the relative merits of different surgical approaches for hysterectomy in Chinese women. Clinical data from 4653 cases of hysterectomy performed in Tongji Hospital from 2004 to 2009 were analysed. Hysterectomy was most commonly performed among women aged 40--49 years (2299; 49.4%). Overall, colporrhagia and abdominal pain were the two most common indications for hysterectomy. The most common indications by age groups were as follows: malignant ovarian tumour,<20 years; malignant uterine tumour, 20--29 and 30--39 years; uterine myoma, 40--49 and 50--59 years; and uterine prolapse, 60--69 and>70 years. The proportion of malignant aetiology also varied by age, being the highest in women aged<20 years (75.0%) and the lowest in those aged 40--49 years (19.9%). Approximately 35% women who had hysterectomies also had concomitant bilateral oophorectomy. The lowest rate of oophorectomy occurred in women aged 30--39 years (15.8%), whereas the highest rate was in those aged 50--59 years (75.9%). The abdominal surgical approach was used in 84% of all hysterectomies. Surgeries using the vaginal approach required a significantly shorter operating time (118 min average) than all other approaches (P<0.05). Both the amount of bleeding and the blood transfusion volume required were smaller in vaginal approaches, with no significant differences between the others. The surgical approaches used were also related to the scope of surgery. Both the surgical indications and the rates of bilateral oophorectomy varied by age. In terms of both operating time and the amount of bleeding and blood transfusion volume required, the vaginal approach was superior to all other surgical approaches.
关键词: hysterectomy surgical indications surgical approach bilateral oophorectomy
王海桥,田峰,黄俊歆,陈涛
《中国工程科学》 2007年 第9卷 第11期 页码 43-47
根据独头巷道作业空间的特点,给出了独头巷道局部空气年龄、平均空气年龄的定义及其计算模型,用示踪气体测定平均空气年龄的方法和原理,并用CFD (computational fluid dynamics)对独头巷道附壁受限射流通风流场及平均空气年龄进行了数值计算,得出了独头巷道空间通风流场和平均空气年龄分布,建立了计算换气效率和排污效率的数学模型。研究表明影响通风有效性的主要因素是空气年龄和污染物浓度,而影响空气年龄主要是通风气流组织和通风量。为评价独头巷道通风有效性提供了一种新的理论依据。
张君娴,杨婷,徐晓帆,龙春燕,刘建苏,李莉
《中国工程科学》 2015年 第17卷 第6期 页码 57-60
了解乌鲁木齐市流动育龄妇女的避孕状况,为今后开展避孕方法知情选择优质服务提供参考。采用分层-整群-随机抽样的方法,对18~50岁符合条件的对象进行问卷调查,主要包括人口学特征、避孕措施的使用情况等。采用卡方检验和多因素Logistic回归方法进行统计分析。本次调查的106 568例流动育龄妇女中,避孕方法使用比例为92.78 %,避孕方法的选择依次为宫内节育器(65.74 %)、药物(23.17 %,包括口服避孕药、皮下埋植剂、避孕针等含药避孕方法)、避孕套(9.06 %)、绝育术(2.03 %)。多因素Logistic回归分析显示民族、学历、职业、婚姻状况和性生活频率对避孕方法的使用有影响。应根据不同民族的情况和流动育龄妇女的人口学特征,提供有针对性和个性化的避孕方法知情选择指导和服务。
Ancient road transport devices: Developments from the Bronze Age to the Roman Empire
Cesare ROSSI,Thomas G. CHONDROS,Kypros F. MILIDONIS,Sergio SAVINO,Flavio RUSSO
《机械工程前沿(英文)》 2016年 第11卷 第1期 页码 12-25 doi: 10.1007/s11465-015-0358-6
The development of transportation systems has significantly enhanced the welfare and modernization of society. Wooden vehicles pulled by animals have been used for land transportation since the early Bronze Age. Whole-body gharries with rigid wheels pulled by oxen appeared in Crete by 2000 BC or earlier. Horses originating from the East were depicted in early Cretan seal-rings of the same period. The two-wheeled horse-drawn chariot was one of the most important inventions in history. This vehicle provided humanity its first concept of personal transport and was the key technology of war for 2000 years. Chariots of Mycenaean and Archaic Greece with light and flexible four-spoked wheels acting as spring suspensions were depicted in vase paintings. The development of this vehicle incorporated the seeds of a primitive design activity and was important for engineering. The Trojan horse since 1194 BC and the helepolis since 700 BC were the first known machines on a wheeled base transported by horses or self-powered. Ancient engineers invented bearings lubricated with fat, and Romans introduced the ancestors of ball bearings for their wagons and carts. The historic evolution of wheeled transportation systems, along with early traction, suspension, and braking systems, is presented in this paper. Analytical and numerical methods are incorporated to analyze the most conceivable loading situations of typically reconstructed wheeled transportation systems in ancient times. Traction requirements both for horse-driven machines and the power for internal motors are also analyzed. This study can serve as a basis for further development of detailed reconstruction of transportation systems in antiquity.
王代权,刘长艳,向琼,马代慈
《中国工程科学》 2014年 第16卷 第5期 页码 11-15
采取整群抽样调查方法,对2011 年1 月—2013 年5 月在秭归县、夷陵区计划生育服务站因非意愿妊娠而实行人工终止妊娠对象,通过查阅病历资料和调查问卷,了解非意愿性妊娠原因及相关因素。1 360例非意愿妊娠中,未婚为21.62 %,已婚为78.38 %;人群分布在20~39 年龄段(73.82 %);孕次分布主要在孕2~孕3 的对象为57.87 %;非意愿妊娠中避孕措施失败者为44.34 %,无措施者为55.66 %。避孕措施因素宫内节育器为10.51 %,避孕套为10.51 %,避孕药为8.24 %,外用为6.62 %,其他为8.46 %。存在侥幸心理和取出宫内节育器(IUD)后续措施没能跟进是无措施者导致非意愿妊娠的主要原因。避孕知识知晓率为98.90 %,对紧急避孕的知晓率仅为15.37 %,知道哺乳期需避孕者为18.38 %。医务人员、计生干部、宣传资料是已婚人群获取避孕知识的主要途径,农民及农民工对象获取免费服务高于城镇居民、国家工作人员、商业服务人员及外来流入人员。
董超, 李静海, Daya Reddy
《工程(英文)》 2022年 第19卷 第12期 页码 22-23 doi: 10.1016/j.eng.2022.05.002
我国一次气溶胶和二次无机气溶胶大气年龄的时空分布特征 Article
Xiaodong Xie, Qi Ying, 张宏亮, 胡建林
《工程(英文)》 2023年 第28卷 第9期 页码 117-129 doi: 10.1016/j.eng.2022.03.013
颗粒物的老化时间尺度是确定其对空气质量、人类健康和气候影响的关键参数。本研究使用年龄可分辨的社区多尺度空气质量模型CMAQ对我国一次和二次无机细颗粒物(PM2.5)的年龄分布进行了为期一年的模拟。结果表明,一次PM2.5(PPM)和铵盐主要来源于本地的新鲜排放,我国大部分地区约60%~80%集中在0~24 h年龄档。夏季,大多数地区的平均年龄约为15~25 h,但冬季,我国南部地区和四川盆地(SCB)的平均年龄增加到40~50 h。硫酸盐的大气年龄明显大于PPM,表明区域输送的贡献增加。在大多数地区和季节,大气年龄> 48 h的老化硫酸盐占硫酸盐总质量浓度的30%~50%。冬季SCB地区年龄> 96 h的硫酸盐浓度可达15 µg·m−3。长三角、珠三角和华南地区硫酸盐大气年龄的季节变化较大,冬季的平均年龄最高为60~70 h,夏季最低为40~45 h。夏季硝酸盐的平均年龄为20~30 h,冬季增加至40~50 h。夏季,气态硝酸的占比增加导致总硝酸的沉降速率的增大;同时,更强的大气氧化性加快了氮氧化物向硝酸盐的化学转化速率,从而导致夏季硝酸盐的大气年龄较低。此外,在污染天,大多数城市和季节中老化粒子(> 24 h)对PPM和二次无机气溶胶的贡献明显增加,这表明区域输送在重污染事件中发挥着至关重要的作用。本研究中基于年龄可分辨的CMAQ模型得到的PM2.5年龄信息可以帮助政府部分制定有效的应急排放控制措施,有助于消除重污染天气。
IgG N-糖基心血管年龄独立于真实年龄精准表征心血管事件风险 Article
武志远, 郭政, 郑雨露, 王玉涛, 张海平, 潘慧颖, 李志伟, Lois Balmer, 李霞, 陶丽新, 郭秀花, 王嵬
《工程(英文)》 2023年 第26卷 第7期 页码 99-107 doi: 10.1016/j.eng.2022.12.004
亚临床动脉粥样硬化和代谢紊乱是心血管健康的重要风险因素,应用免疫球蛋白G(IgG)N-聚糖模式作为炎症指标表征其发病风险已有研究报道。然而,对于IgG N-糖基谱在心血管疾病(CVD)风险分层中的能力仍然未知。本研究旨在利用IgG N-糖基标志物开发追踪心血管疾病风险的年龄指数。本研究基于横断面调查,从Busselton健康和老龄研究中共招募1465名40~70岁之间的个体。使用机器学习递归特征消除和惩罚回归算法逐步筛选特征糖基,并开发IgG N-糖基化心血管年龄(GlyCage)指数,以反映归因于心血管风险的与真实年龄间的偏差。结果显示,对GlyCage指数贡献最大的是具有双分叉N-乙酰葡萄糖胺(GlcNAc)的岩藻糖基化N-聚糖(GP6, FA2B)和具有双分叉GlcNAc的双半乳糖基化N-聚糖(GP13, A2BG2)。GlyCage独立于真实年龄,与较高的Framingham十年心血管风险[优势比(OR)为1.09;95% CI: 1.05~1.13]和患心血管疾病概率(OR, 1.07; 95% CI: 1.01~1.13)显著相关。GlyCage大于真实年龄三年及以上的个体,其心血管风险和心血管疾病患病概率增加,调整后的OR值分别为2.22(95% CI:1.41~3.53)和2.71(95% CI: 1.25~6.41)。GlyCage指数区分十年心血管风险和事件的ROC曲线下面积(AUC)值分别为0.73和0.65,而真实年龄为0.65和0.63。因此,本研究开发的GlyCage指数利用IgG N-糖基谱追踪心血管健康水平。GlyCage和真实年龄之间的差距能够独立地表征心血管风险,提示IgG N-糖基化在心血管疾病的发病机制中起作用。GlyCage指数对心血管风险的预测能力需要在其他人群中进行外部和纵向验证。
智能化时代的软件开发:拥抱大模型的正确姿势 Perspective
彭鑫
《信息与电子工程前沿(英文)》 2023年 第24卷 第11期 页码 1513-1519 doi: 10.1631/FITEE.2300537
张君娴,周彦岭,刘建苏,王珊,李莉,梅桂,李琳,巴哈古丽·塔吉曼提
《中国工程科学》 2014年 第16卷 第5期 页码 85-89
了解乌鲁木齐市流动人口育龄妇女阴道炎感染患病现况,为今后的生殖道感染防治提供参考依据。本文采取分层-整群-抽样的方法,在乌鲁木齐市六区一县流动人口较集中的社区,由经过培训的医生对18~50 岁的流动育龄妇女进行生殖道感染问卷调查、妇科检查与实验室检查。本研究共检查106 568 名符合条件的流动妇女,其中细菌性阴道炎的患病率为16.15 %;滴虫性阴道炎的患病率为12.66 %;霉菌性阴道炎的患病率为4.52 %。3 种阴道炎的患病率为19.84 %。应根据不同民族的特点,采取一定的防治措施,降低流动育龄妇女的阴道炎患病率,特别是对文化程度为文盲或小学、职业为农民、月收入在1 500~1 599 元的对象,应加大干预的力度。
标题 作者 时间 类型 操作
Age-related trends in genetic parameters for wood properties in
Chao SUN, Meng LAI, Shougong ZHANG, Xiaomei SUN
期刊论文
Epidemiological studies of women under age 30 infected with human papillomavirus
Zhihua LIU MD, Qing LI BM, Weihong LI BM,
期刊论文
Comparison of surgical indications for hysterectomy by age and approach in 4653 Chinese women
null
期刊论文
Ancient road transport devices: Developments from the Bronze Age to the Roman Empire
Cesare ROSSI,Thomas G. CHONDROS,Kypros F. MILIDONIS,Sergio SAVINO,Flavio RUSSO
期刊论文
IgG N-糖基心血管年龄独立于真实年龄精准表征心血管事件风险
武志远, 郭政, 郑雨露, 王玉涛, 张海平, 潘慧颖, 李志伟, Lois Balmer, 李霞, 陶丽新, 郭秀花, 王嵬
期刊论文