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高固色率活性藏青P2RN的开发与应用 被引量:2
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作者 陶玉洪 向红 +1 位作者 刘儒初 杨晶晶 《印染》 CAS 北大核心 2022年第11期28-32,共5页
为了解决现有活性藏青P2R固色率低、沾色牢度差以及印花织物易出现渗化现象等问题,开发了新型活性藏青P2RN,并对其提升性能、印花工艺稳定性、色牢度和固色性能等进行了研究。结果表明:在不使用尿素时,活性藏青P2RN印花棉织物和粘胶织物... 为了解决现有活性藏青P2R固色率低、沾色牢度差以及印花织物易出现渗化现象等问题,开发了新型活性藏青P2RN,并对其提升性能、印花工艺稳定性、色牢度和固色性能等进行了研究。结果表明:在不使用尿素时,活性藏青P2RN印花棉织物和粘胶织物的K/S值可分别达到14.04和12.78。相对湿度在50%~80%,以及蒸化时间达到5min后,活性藏青P2RN印花织物的K/S值趋于稳定,且各项色牢度性能优越。 展开更多
关键词 印花 活性藏青 高固色率 粘胶
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Earthquake Activity Features Before Earthquakes with M_S≥7.0 in the Central-Northern Qinghai-Xizang(Tibet) Block
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作者 Li Ying Zhao Weiming Ma Heqing 《Earthquake Research in China》 2005年第2期192-200,共9页
We have studied the seismicity features of M_S≥5.0 earthquakes two years before strong earthquakes with M_S≥7.0 occurred in the central-northern Qinghai-Xizang (Tibet) block since 1920. The results have showed that ... We have studied the seismicity features of M_S≥5.0 earthquakes two years before strong earthquakes with M_S≥7.0 occurred in the central-northern Qinghai-Xizang (Tibet) block since 1920. The results have showed that there is an obvious gap or quiescence of M_S5.0~6.9 earthquakes near epicenters. We have also studied statistical seismicity parameters of M_S5.0~6.9 earthquakes in the same region since 1950. The results have showed that earthquakes with M_S≥7.0 occurred when earthquake frequency is relatively high and earthquake time, space accumulation degrees are rising. And the prediction effect R value scores are between 0.4~0.7. We have concluded that, before earthquakes with M_S≥7.0 in the central-northern Qinghai-Xizang (Tibet) block, M_S5.0~6.0 earthquake activity in the whole area increased and accumulated in time and space, but earthquakes with M_S≥7.0 occurred where M_S5.0~6.0 earthquake activity was relatively quiet. 展开更多
关键词 Central-northern Qinghai-Xizang (Tibet) block Strong earthquake Seismicity pattern features Seismicity parameter
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Study on Statistical Features About Weak Earthquake Activity Before Moderately Strong Earthquakes in the Middle Northern Part of the Qinghai-Xizang (Tibet) Block
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作者 Ma Heqing Sheng Juqing Zhao Weiming Ren Xuemei Jin Chunhua 《Earthquake Research in China》 2006年第2期148-158,共11页
In regards to the earthquakes recording M ≥ 5.0 that occurred in middle northern part of the Qinghai-Xizang (Tibet) Block from 1970 - 2003, in this study we describe the temporal and spatial centralization features... In regards to the earthquakes recording M ≥ 5.0 that occurred in middle northern part of the Qinghai-Xizang (Tibet) Block from 1970 - 2003, in this study we describe the temporal and spatial centralization features of the weak earthquakes and the enhancement and anomalous quiescence of their seismic activity before main shocks through 4 parameters, which are basically not correlated: earthquake time centralization degree parameter Ct, earthquake space centralization degree parameter Cd, η value and weak earthquake frequency and so on. On the basis of calculation results, it has been seen that before earthquakes with M ≥ 5.0 took place in the middle northern part of the Qinghal-Xizang (Tibet) Block, the frequency of weak earthquakes often shows ascent and drop, their strength shows an obvious enhancement and the centralization distribution with time and space is evident. 展开更多
关键词 The middle northern part of the Qinghai-Xizang (Tibet) Block Weak earthquake activity Statistical study
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Seasonal dynamics of suprapermafrost groundwater and its response to the freeing-thawing processes of soil in the permafrost region of Qinghai-Tibet Plateau 被引量:14
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作者 CHANG Juan WANG GenXu +1 位作者 LI ChunJie MAO TianXu 《Science China Earth Sciences》 SCIE EI CAS CSCD 2015年第5期727-738,共12页
The suprapermafrost groundwater in permafrost region not only is an important component of the water cycle and land surface process, but also is closely associated with the charges of ecological environment in cold re... The suprapermafrost groundwater in permafrost region not only is an important component of the water cycle and land surface process, but also is closely associated with the charges of ecological environment in cold region. However, the seasonal dynamics, driving factors, and mechanism of suprapermafrost groundwater are not well understood. Based on observation at slope scale on suprapermafrost groundwater dynamics of typical alpine meadows in the Qinghai-Tibet Plateau, the seasonal dynamics, spatial distribution and driving factors of suprapermafrost groundwater were analyzed. The results showed that there were close relationships between the seasonal dynamics of suprapermafrost groundwater and the freezing-thawing processes of active soil in permafrost region. The seasonal dynamics of suprapermafrost groundwater and its slope distribution pattern were controlled by soil temperature of active layers. The phase and range of the suprapermafrost groundwater dynamics are determined by deep soil(below 60 cm depth) moisture and groundwater recharging sources. The relationship between active soil temperatures and dynamics of suprapermafrost groundwater levels was better described by Boltzmann functions. However, the influencing thresholds of soil temperature on groundwater dynamics varied at different depths of active layers and in different slope positions, which resulted in the significant spatial heterogeneity of suprapermafrost groundwater dynamics in slope scale. Land cover change and global warming certainly altered the dynamics of suprapermafrost groundwater and the hydraulic interaction between groundwater and rivers, and consequently altered the overall hydrologic cycle of watershed scale. 展开更多
关键词 suprapermafrost groundwater seasonal dynamics soil hydrothermal characteristics freezing-thawing process
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Variation in β-amylase activity and thermostability in Tibetan annual wild and cultivated barley genotypes 被引量:2
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作者 Hai-tao ZHANG Tian-long CHEN Bing-lin ZHANG De-zhi WU Ye-chang HUANG Fei-bo WU Guo-ping ZHANG 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2014年第9期801-808,共8页
13-Amylase activity (BAA) and thermostability (BAT) are important traits for malt quality. In this study, 138 Tibetan annual wild barley accessions and 20 cultivated genotypes differing in BAh, were planted and an... 13-Amylase activity (BAA) and thermostability (BAT) are important traits for malt quality. In this study, 138 Tibetan annual wild barley accessions and 20 cultivated genotypes differing in BAh, were planted and analyzed in 2009 and 2012. Significant differences were detected among genotypes in BAA and BAT. The cultivated genotypes had a mean BAA of 1137.6 U/g and a range of from 602.1 to 1407.5 U/g, while the wild accessions had a mean of 1517.9 U/g and a range of from 829.7 to 2310.0 U/g. The cultivated genotypes had a mean relative residual 13-amylase activity (RRBAA) of 61.6% and a range of from 22.2% to 82.3%, while the wild barleys had a mean of 57.8% and a range of from 21.9% to 96.1%. Moreover, there was a significant difference among genotypes in the response of RRBAA to the temperature and duration of heat treatment. The wild barleys had wider variation in BAA and BAT than cultivated genotvDes. 展开更多
关键词 BARLEY D-Amylase activity Thermostability TIBET
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The Late Pleistocene activity of the eastern part of east Kunlun fault zone and its tectonic significance 被引量:9
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作者 ZHANG JunLong REN JinWei +4 位作者 CHEN ChangYun FU JunDong YANG PanXin XIONG RenWei HU ChaoZhong 《Science China Earth Sciences》 SCIE EI CAS 2014年第3期439-453,共15页
The nearly EW-trending East Kunlun fault zone is the north boundary of the Bayan Har block.The activity characteristics and the position of the eastern end of its eastward extension are of great significance to probin... The nearly EW-trending East Kunlun fault zone is the north boundary of the Bayan Har block.The activity characteristics and the position of the eastern end of its eastward extension are of great significance to probing into the dynamic mechanism of formation of the east edge of the Tibetan Plateau,and also lay the foundation for seismic risk assessment of the fault zone.The following results are obtained by analysis based on satellite image interpretation of landforms,surface rupture survey,terrace scarp deformation survey,and terrace dating data on the eastern part of the East Kunlun fault zone:(1)the Luocha segment is a Holocene active fault,where a reverse L-shape paleoearthquake surface rupture zone of about 50 km long is located;(2)the Luocha segment is characterized by left-lateral slip movement under the compression-shear condition since the later period of the Late Pleistocene,with a rate of 7.68–9.37 mm/a and a vertical slip rate of 0.7–0.9 mm/a,which are basically in accord with the activity rate of segments on its west side.The results indicate that it is a part of eastward extension of the East Kunlun fault zone;(3)the high-speed linear horizontal slip of the nearly EW-trending East Kunlun fault zone is blocked by the South China block at east,and transforms into the vertical movement of the nearly SN-NNE trending Minjiang fault zone and the Longmenshan fault zone,and the uplift of Longmenshan and Minjiang.The area where transform of the two tectonic systems occurred confines the position of the east end;(4)Luocha segment and Maqu segment constitute the"Maqu seismic gap",so,seismic risk at Maqu segment is higher than that at Luocha segment,which should attract more attention. 展开更多
关键词 the East Kunlun fault zone eastern end slip rate tectonic transform seismic risk
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