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Key technical problems of extra-high concrete faced rock-fill dam

Science China(Technological Sciences) 2007年第z1期50卷 20-33页

作者： MA HongQi1? & CAO KeMing2 1Yunnan Huaneng Lancang River Hydropower Co., Ltd., Kunming 650011, China 2East China Investigation, Design & Research Institute, Hangzhou 310014, China 1. Yunnan Huaneng Lancang River Hydropower Co. Ltd. Kunming 650011 China 2. East China Investigation Design & Research Institute Hangzhou 310014 China

This paper summarizes the main technical points related to 100 m-height-scale concrete faced rock-fill dams and analyzes the main problems and their causes occurring during construction of 200 m-height-scale concrete faced rock-fill dams. This paper has raised the key technical problems which need to study for construction of 300 m-height-scale concrete faced rock-fill dams based on the main experiences on the extra-high concrete faced rock-fill dams built after the year of 2000.

关键词： concrete faced rock-fill dam extra-high dam key technology

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Impairment of extra-high frequency auditory thresholds in subjects with elevated levels of fasting blood glucose

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Journal of Otology 2018年第1期13卷 29-35页

作者： Anindya Das Ahmed Faisal Sumit Nazmul Ahsan Masashi Kato Nobutaka Ohgami Anwarul Azim Akhand Department of Genetic Engineering and Biotechnology University of Dhaka Dhaka Bangladesh BRAC James P Grant School of Public Health BRAC University Dhaka Bangladesh Department of Occupational and Environmental Health Nagoya University Graduate School of Medicine Nagoya Japan

This study was performed to assess whether there is an association between elevated Fasting Blood Glucose(FBG) and hearing impairment in Bangladeshi population. A total of 142 subjects(72 with elevated FBG; 70 control) were included in the study. The mean auditory thresholds of the control subjects at 1,4,8 and 12 kHz frequencies were 6.35 ± 0.35,10.07 ± 0.91,27.57 ± 1.82, 51.28 ± 3.01 dB SPL(decibel sound pressure level), respectively and that of the subjects with elevated FBG were 8.33 ± 0.66,14.37 ± 1.14, 38.96 土 2.23, and 71.11 ± 2.96 ***. The auditory thresholds of the subjects with elevated FBG were significantly(p higher than the control subjects at all the above frequencies, although hearing impairment was most evidently observed at an extra-high(12 kHz) frequency. Subjects with a long duration of diabetes(>10 years) showed significantly(p higher level of auditory thresholds at 8 and 12 kHz, but not at 1 and 4 kHz frequencies,compared to subjects with shorter duration of diabetes(≤10 years). In addition, based on the data of odds ratio, more acute impairment of hearing at the extra-high frequency was observed in diabetic subjects of both older(>40 years) and younger(extra-high frequency hearing impairment in diabetic subjects after adjustment for age, gender and BMI. This study provides conclusive evidence that auditory threshold at an extra-high frequency could be a sensitive marker for hearing impairment in diabetic subjects.

关键词： Fasting blood glucose Hearing impairment Auditory thresholds extra-high frequency

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特高压输电线路直流融冰变流系统设计

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电力系统保护与控制 2014年第11期42卷 124-129页

作者：陆佳政朱思国李波方针张红先湖南省电力公司科学研究院国家电网公司输变电设备防冰减灾技术实验室湖南长沙410007

随着特高压的推广,特高压输电线路的抗冰融冰正成为研究的热点。特高压输电线路由于线径粗、线路长,所需融冰电流与装置容量大,其电流融冰是一个研究的难点。针对特高压输电线路的特点提出了分段直流融冰方法,其将特高压输电线路分成若... 详细信息

随着特高压的推广,特高压输电线路的抗冰融冰正成为研究的热点。特高压输电线路由于线径粗、线路长,所需融冰电流与装置容量大,其电流融冰是一个研究的难点。针对特高压输电线路的特点提出了分段直流融冰方法,其将特高压输电线路分成若干段,选取重覆冰区的线路段设置直流融冰点与融冰短路点,可以有效减小融冰装置容量。针对特高压输电线路融冰所需直流融冰装置容量大特点,为了减小融冰装置网侧电流的谐波畸变率,采用24脉波整流变压器+多台整流器并联方式,可以有效减小直流融冰装置对网侧电源的干扰,并可减小输出直流电压纹波因数。最后对所设计的特高压输电线路直流融冰装置进行了仿真研究,采用24脉波整流变压器+多台整流器并联方式后,可以有效消除整流器引起的输入侧电流中5次和7次谐波电流,整流变压器输入侧电流低次谐波总畸变率仅为0.51%,输出直流电压脉波数为24,电压纹波因数仅为0.616。仿真结果证明了所设计特高压直流融冰装置的可行性与正确性。

关键词：特高压分段直流融冰谐波畸变率 24脉波整流变压器电压纹波因数 extra-high voltage (EHV)

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Water Memory Due to Chains of Nano-Pearls

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Journal of Modern Physics 2018年第14期9卷 2657-2724页

作者： Auguste Meessen Université Catholique de Louvain (UCL) Louvain-la-Neuve Belgium

Biologically active molecules create substitutes in liquid water by forming single-domain ferroelectric crystallites. These nanoparticles are spherical and constitute growing chains. The dipoles are aligned, but can be set in oscillation at the frequency of vibration of the charged part of active molecules. They are then automatically trimmed and become information carriers. Moreover, they produce an oscillating electric field, causing autocatalytic multiplication of identical chains in the course of successive dilutions. Active molecules are thus only required to initiate this process. Normally, they excite their specific receptors by resonance, but trimmed chains have the same effect. This theory is confirmed by many measurements.

关键词： Water Memory extra-high Dilutions Ferroelectric Particles Chains of Nanoparticles Water Bridges Molecular Interactions

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