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Search Results: 1 - 10 of 1961 matches for " 黄海生 "
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断层剪力墙框剪结构地震作用的时程分析
黄海生,王全凤
福州大学学报(自然科学版) , 2006,
Abstract: 采用杆系-层间模型和弹性时程分析法对不同高度和结构刚度特征值的断层剪力墙框剪结构进行动力分析.该法与振动台实验结果对比,吻合较好.设定了最大层间位移角θmax为可中断剪力墙的条件.计算表明:随着刚度特征值的增加,可中断剪力墙的高度随之增加.给出了两者之间的表达式;结构高度对中断剪力墙高度的影响较小.
粉煤灰和矿粉对再生混凝土徐变性能影响的研究
Study on the impact of blast furnace slag and fly ash on creep character of recycled aggregate concrete

黄海生,郑建岚
福州大学学报(自然科学版) , 2017, DOI: 10.7631/issn.1000-2243.2017.02.206
Abstract: 设计不同掺量的粉煤灰单掺和粉煤灰加矿粉复掺(比例按1∶1)两种系列共10组试件,研究其对再生混凝土徐变性能的影响. 试验结果表明: 适量的粉煤灰单掺能有效地抑制再生混凝土徐变的发展,当掺量分别为40%和30%时,对再生混凝土的总徐变和基本徐变抑制效果最优;粉煤灰加矿粉复掺与粉煤灰单掺相比具有相似的规律,且对再生混凝土徐变的抑制效果更佳. 以ACI209R徐变预测模型为基础,考虑再生粗骨料、粉煤灰单掺和粉煤灰与矿粉复掺掺量的影响,提出再生混凝土的徐变预测修正模型.
Two series of recycled aggregate concrete (RAC) mixtures were prepared with fly ash and fly ash-slag (ratio by 1∶1) on the effect of the creep properties,and a total of 10 groups of specimens were produced. The results show that using the right amount of fly ash as a substitute for cement decreases the creep of RAC. In addition,fly ash exhibits the best inhibitory effect on the growth of total creep and basic creep when the replacement rates are 40% and 30%. Compared with fly ash,fly ash-slag has similar law,and had better inhibitory effect on the creep of RAC. Based on the ACI209R creep prediction model,the influence of recycled coarse aggregate and the replacement rates of fly ash and fly ash-slag are considered by the prediction model of RAC
多脏器受累的结节性硬化症超声表现一例
黄海生,周菲菲,石岩
中华医学超声杂志(电子版) , 2010,
Abstract: 患者男,25岁。因“反复发热14d,恶心3d,发现腹腔多发占位2d”入院。4岁时出现鼻翼左侧皮疹,后面部皮疹逐渐增多并增大;初中时曾出现癫痫发作,长期口服复方苯巴比妥溴化钠,未再复发。查体:额部及鼻翼两侧可见较多针尖至小米粒大小红色或肤色皮疹。肝肋下可触及3cm。右肾区明显膨隆,上极可触及一巨大包块,大小约14cm×15cm×16cm,边界尚清,质中等硬,无叩击痛。
北斗接收机的互相关抑制算法研究
Cross correlation rejection algorithm based on Beidou receiver

赵焕焕,黄海生,张伟,杨勇
- , 2015,
Abstract: 针对弱信号捕获过程中可能受到强信号的互相关干扰导致误捕获,提出一种基于北斗二代接收机系统的互相关抑制算法。其主要思想是在基带数字处理阶段,接收机所希望检测的弱信号伪码与接收到的多颗卫星信号进行相关运算,结果减去其他卫星的互相关值,从而得到被检测的弱信号。通过仿真验证表明,该算法可以准确进行弱信号捕获,有效地提高了北斗二代接收机的捕获灵敏度。
Aimed at the weak signal capture process caused by the strong signal cross correlation disturbance error,a cross correlation suppression algorithm based on Beidou second generation receiver system is proposed.At the baseband digital processing stage,the weak signal pn code detected in the receiver and received satellite signal are related to operations and minus the other satellites cross correlation values of other satellites thus the weak signal is detected.The simulation shows that the algorithm can capture weak signals,and improve the capture sensitivityof Beidou second generation receiver
原发性睾丸恶性淋巴瘤超声表现一例
黄海生,许建军,左忠明,许燕
中华医学超声杂志(电子版) , 2010,
Abstract: 患者男,50岁,发现右侧睾丸肿物3个月。无疼痛等不适。查体:阴囊皮肤及温度均正常,右侧睾丸可触及一大小约4cm×3cm×4cm肿块,质硬,无压痛,挤压后不见缩小,左侧睾丸及附睾正常。腹股沟区及全身其他部位未触及肿大淋巴结。超声检查:右侧睾丸大小约4.4cm×2.7cm×3.5cm,形态饱满,
水热合成羟基磷灰石表面修饰α-半水石膏复合颗粒
程逵,章华勇,翁文剑,李坚,黄海生
硅酸盐学报 , 2013,
Abstract: 在柠檬酸和硫酸镁溶液中同时直接引入二水石膏与羟基磷灰石(hydroxyapatite,HA)共水热合成,获得了一种具有HA表面修饰的α-半水石膏的复合颗粒,并分析了该复合颗粒的成分、形貌、微观结构。结果表明水热合成的颗粒是以α-半水石膏为主体,有HA在其表面修饰;随着HA的添加量的增加,HA表面修饰层的覆盖范围明显增加。
Recent Progresses from Studies of Leaf Development
植物叶发育调控机理研究的进展

黄海
植物学报 , 2003,
Abstract: In the plant vegetative growth, leaf primordia arise from groups of initial cells within the peripheral zone of the shoot apical meristem.Leaf develops by following a series of cell division and differentiation programs to form its final shape and size. Recent genetic and molecular studies have led to the identification of a number of genes that regulate leaf development, and have also revealed that plant hormones play important roles in leaf primordium induction and leaf patterning.The challenge now is to further identify new players regulating leaf development and to establish the genetic interaction between regulatory genes as well as the relationship between gene regulations and hormone actions.
小麦叶绿体中细胞分裂素的结合蛋白
黄海
科学通报 , 1987,
Abstract: 在激素作用机理的研究中,激素受体的鉴别和定位是一个重要的研究内容,自从1970年发现高等植物的核糖体存在着细胞分裂素(CTK)的结合蛋白之后,陆续在一些植物的不同细胞组份中发现了这种结合蛋白。但是,CTK是否能与植物细胞的某一细胞器结合还未见报道,黄卓辉与魏家绵曾报道过6-苄氨基嘌呤(6BA)能使离体叶绿体的光合磷酸化活性增强。这使我们对CTK是否能与叶绿体结合,从而调节光合作用或代谢过程产生兴
遥感地质工作回顾与展望──庆祝中国地质勘查技术院建院五周年
黄海
国土资源遥感 , 1994, DOI: 10.6046/gtzyyg.1994.03.01
Abstract: 1989,中国地质勘查技术院在原地矿部物化探局和部探矿办的基础上组建正式成立。原物化探局地质遥感中心划归勘查技术院领导。
我国地学领域遥感应用新进展
黄海
国土资源遥感 , 1996, DOI: 10.6046/gtzyyg.1996.01.02
Abstract: 地学领域是我国最早开展遥感工作的领域之一,尤其自航天遥感技术投入应用以来,经过近二十年的努力,遥感技术在地学方面的应用范围更加广泛,技术日趋成熟。
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