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| 1 | Records of the East Asian winter monsoon from the mud area on the inner shelf of the East China Sea since the mid-Holocene显示文摘AMS14C dating and analysis of grain size,major elements and clay minerals were applied to Core MZ01 from the mud area on the inner shelf of the East China Sea.Based on the environmentally sensitive grain size,clay mineral and major element assemblages,the history of the East Asia winter monsoon since the mid-Holocene could be reconstructed.These three proxies,mean grain size(>9.71μm),chemical index of alteration(CIA)and ratio of smectite to kaolinite in particular,show similar fluctuation patterns. Furthermore,10 extreme values corresponding to the contemporary cooling events could be recognized since the mid-Holocene;these extreme values are likely to have been caused by the strengthening of the East Asia winter monsoon.The cooling events correlated well with the results of theδ18O curves of the Dunde ice core and GISP2,which therefore revealed a regional response to global climate change.Four stages of the East Asia winter monsoon were identified,i.e.8300-6300 a BP,strong and unstable;6300-3800 a BP,strong but stable;3800-1400 a BP,weak and unstable;after 1400 a BP,weak but stable. | LIU ShengFa SHI XueFa LIU YanGuang QIAO ShuQing YANG Gang FANG XiSheng WU YongHua LI ChaoXin LI XiaoYan ZHU AiMei GAO JingJing | 2010 | Chinese Science Bulletin2010，55，21： | 25 |
| 2 | Clay mineral composition and their sources for the fluvial sediments of Taiwan Residents rivers显示文摘Located at the collision boundary between the Philippine Sea Plate and the Eurasian Continental Plate,the island of Taiwan is generally recognized as an important example in the MARGINS Program Science Plan and 'source-to-sink' research because of its high tectonic activity,heavy rainfall and unique geography.Large suspended sediment loads are transported to the adjacent ocean by Taiwan Residents rivers every year,making Taiwan an important source of sediments into the adjacent seas and a natural laboratory for studying the systemic movement of fluvial sediments from source to sink.A detailed study on the clay mineral composition of surface sediments collected from the drainage basins of 12 Taiwan Residents rivers using X-ray diffraction methods was conducted.Our results indicated that the clay mineral assemblages consisted dominantly of illite(approximately 73%) and chlorite(approximately 24%),with lesser abundances of kaolinite(approximately 3%) and even lower levels of smectite from the Danshuei River sediments in northwestern Taiwan.The Jhuoshuei River sediments from western Taiwan contained clay mineral assemblages that consisted of illite(approximately 75%) and chlorite(approximately 25%),but they lacked kaolinite and smectite.In southwestern Taiwan,the clay mineral assemblages were dominated by illite(approximately 75%) and chlorite(approximately 23%),but had a low abundance of kaolinite(generally < 2%) and no smectite.The clay mineral assemblages in eastern Taiwan are obviously different from those in western parts of the island.The most noticeable difference is that the average abundance of chlorite in the Hualien River from eastern Taiwan was the highest(approximately 48%) of all the Taiwan Residents rivers.We concluded that,in general,the clay mineral assemblages in Taiwan Residents rivers were mainly composed of illite and chlorite with kaolinite and smectite being scarce,and these trends are different from those in China's mainland rivers.The clay mineral composition shown in this study was primarily determined by the properties of the bedrock,and the differential weathering intensities of the drainage area.The surface sediments in Taiwan's rivers showed a greater abundance of illite and chlorite because the outcropped rocks were mainly composed of Tertiary sedimentary rocks,especially sandstone,shale and slate,and show strong physical weathering.The relatively high relief and more abundant rainfall also caused the clay minerals in the fluvial sediments to be transported to the estuaries down rivers from the mountains and then delivered to the adjacent seas by currents and waves over a shorter time scale. | LI ChuanShun SHI XueFa KAO ShuhJi CHEN MinTe LIU YanGuang FANG XiSheng LUE HuaHua ZOU JianJun LIU ShengFa QIAO ShuQing | 2012 | Chinese Science Bulletin2012，57，6： | 23 |
| 3 | Garnet granulite facies xenoliths from Yingfengling Cenozoic basalt in Leizhou, Guangdong Province显示文摘The granulite xenoliths are first found in Yingfengling pyroclastic rocks of Leizhou region, Guangdong Province. Of them high_pressure garnet granulite xenolith found is very sparse in China. Garnet granulite is different from pyroxene granulite in mineral assemblage and composition. \%P_T\% calculation shows that garnet granulite was formed at 1 130-1 160℃and 1.4-1.7 GPa, and pyriclasite at about 800℃and 0.65-0.80 GPa. High xenolith_derived paleogeotherm indicates Cenozoic rifting in Leizhou area. Granulites with varied mineral assemblages were formed at different depths by the metamorphism of the underplated basaltic melt. | Jinhai Yu Zhong Fang Xinmin Zhou Minyuan Lai Xisheng Xu Xuan Zhou | 1998 | Chinese Science Bulletin1998，43，23： | 5 |
| 4 | Effect of nanometer-sized MgO particles on flux pinning in YBa_2Cu_30_(7-δ)显示文摘As is well known, the relatively low critical current density J_c and the serious flux motion limit a variety of applications of high-temperature superconductors (HTSCs). The introduction | CHEN Qinghu FANG Minghu YE Xisheng JIAO Zhengkuan ZHANG Qirui WEN Haihu ZHAO Zhongxian | 1997 | Chinese Science Bulletin1997，42，4： | 3 |
| 5 | Measurements of suspended particulate matter with laser in-situ scattering and transmissometry in the Jiaozhou Bay in China显示文摘在原处散布的激光和 transmissometry 探查(LISST - 100 ) 被用来估计推迟的粒子(总数) 的空间变化在 Jiaozhou 海湾的分发,体积集中和横梁变细, Qingdao,中国在 2003 年 7 月 18 日。一个学习地点在嘴被定位(Sta。J1 ) ,与另外的在内部海湾以内(Sta。J2 ) 。全部的浮游物(TSM ) 和叶绿素荧光和底沉积的采样的大小同时被执行。根据领域数据,在原处,有效密度,沉降速度和流动,和粒子投射了的粒子出现区域(PSA ) 被估计。结果证明两侧面在水列以内从表面有类似的颗粒分布到底部。为 Stas J1 和 J2 的吝啬的粒子直径是 38 ~ 7 第 4a 1 ~ 2 分别地,在这些范围以内的粒子在微粒部件上统治的 0 μ m。与水深度推迟了粒子体积集中增加,与底部附近的尖铁。在 Sta。J1,在 10 点的推迟的粒子的底沉积和那些的平均直径。水面是的 8 mbelow 几乎一样,以及他们的尺寸分布。这观察建议一种特殊亲密关系在底部沉积和推迟的粒子之间存在。Inaddition,估计证明有效密度,沉降速度和流动在内部海湾是更高的。横梁衰减系数断然与体积集中相关很好。光散布被 1 ~主要引起 250 个μ m 部件,比 20 μ m 好的粒子在之中统治横梁变细,这被推断。PSA 出现为离开的反射评价的一个代理。 | WEI Jianwei SHI Xuefa FANG Xisheng ZHANG Weibin | 2007 | Acta Oceanologica Sinica2007，26，1： | 2 |
| 6 | Mineralogical study of surface sediments in the western Arctic Ocean and their implications for material sources显示文摘Mineralogical analysis was performed on bulk sediments of 79 surface samples using X-ray diffraction. The analytical results, combined with data on ocean currents and the regional geological background, were used to investigate the mineral sources. Mineral assemblages in sediments and their distribution in the study area indicate that the material sources are complex.(1) Feldspar is abundant in the sediments of the middle ChukchiSea near the Bering Strait, originating from sediments in the Anadyr River carried by the Anadyr Current. Sediments deposited on the western side of the ChukchiSea are rich in feldspar. Compared with other areas, sediments in this region are rich in hornblende transported from volcanic and sedimentary rocks in Siberia by the Anadyr Stream and the Siberian Coastal Current. Sediments in the eastern ChukchiSea are rich in quartz sourced from sediments of the Yukon and Kuskokwim rivers carried by the Alaska Coastal Current. Sediments in the northern ChukchiSea are rich in quartz and carbonates from the Mackenzie River sediments.(2) Sediments of the southern and central Canada Basin contain little calcite and dolomite, mainly due to the small impact of the Beaufort Gyre carrying carbonates from the Canadian Arctic Islands. Compared with other areas, the mica content in the region is high, implying that the Laptev Sea is the main sediment source for the southern and central Canada Basin. In the other deep sea areas, calcite and dolomite levels are high caused by the input of large amounts of sediment carried by the Beaufort Gyre from the Canadian Arctic Islands(Banks and Victoria). The Siberian Laptev Sea also provides small amounts of sediment for this region. Furthermore, the Atlantic mid-water contributes some fine-grained material to the entire deep western Arctic Ocean. | DONG Linsen SHI Xuefa LIU Yanguang FANG Xisheng CHEN Zhihua WANG Chunjuan ZOU Jianjun HUANG Yuanhui | 2014 | Advances in Polar Science2014，25，3： | 2 |
| 7 | Field in single-mode helically-wound optical fibers显示文摘 | Xisheng Fang Zongqi Lin | 1985 | IEEE Transactions on Microwave Theory and Techniques1985，33，11： | 1 |
| 8 | Field in single-mode helically-wound optical fibers显示文摘 | Xisheng Fang Zongqi Lin | 1985 | IEEE Transactions on Microwave Theory and Techniques1985，33，11： | 1 |
| 9 | Clay minerals in Arctic Kongsfjorden surface sediments and their implications on provenance and paleoenvironmental change显示文摘Kongsfjorden is a typical fjord on the edge of the ice cap of the Arctic Svalbard-Barents Sea. Its inner bay is connected with a modern glacier front along the direction of the fjord axis with a significant gradient change in the parameters of hydrology, sedimentation, and biology. In summer, ice and snow melt-water and floating ice collapse continuously and thus transport the weathering products on the surrounding land into the sea. Thus Kongsfjorden is regards as a natural laboratory for the study of unique sedimentation in polar fjords under modern glacial-sea water conditions. In this study, fifty-two surface sediments were collected in Kongsfjorden for clay mineral analysis to study the sediment source and sediment-transport process. Our results indicate that clay minerals in the surface sediments from Kongsfjorden are mainly composed of illite, chlorite, and kaolinite, and no smectite is found. Rocks from different periods exposed extensively in the surrounding areas of Kongsfjorden provide an important material basis for clay minerals in the Kongsfjorden. Kaolinite may be mainly derived from the fluvial deposits, weathered from reddish sandstones and conglomerates during the Carboniferous Period.Illite is mainly derived from Proterozoic low-grade and medium-grade metamorphic phyllite, mica schist, and gneiss. While chlorite is mainly from Proterozoic low-grade metamorphic phyllite and mica schist. In the direction from the fluvio-glacial estuary to the sea of the glacier front of Kongsfjorden, illite increase gradually,and the content of kaolinite declines gradually. However, the change pattern of chlorite is insignificant, which may be related to the provenance. Kongsfjorden detritus is mainly transported by the fluvio-glacial streams and icebergs into the sea and deposited in the inner bay. Coarse sediments are rapidly deposited in the glacier front,estuary, and near-shore areas. Clay fraction begins to deposit significantly by 200–400 m after flowing into the sea,which due to the crystal behavior of clay minerals, hydrodynamic condition and flocculation. Kaolinite and chlorite on the south of the bay near the Blomstrandhalv?ya Island is mainly affected by ice-rafted detritus and thus can reveal the trajectory of transportation by the floating ice while entering the sea. | SHI Fengdeng SHI Xuefa SU Xin FANG Xisheng WU Yonghua CHENG Zhenbo YAO Zhengquan | 2018 | Acta Oceanologica Sinica2018，37，5： | 1 |
| 10 | The probability density distribution of the a posteriori symbols and probabilistic shaping capacity analysis in underwater acoustic communication显示文摘Considering the effects of underwater acoustic channels on underwater acoustic communications,the system capacity of the underwater acoustic(UWA)communication system is analyzed,and an underwater acoustic channel capacity assessment algorithm is studied.A piecewise symbol-variance transfer function mode based on the a posteriori Gaussian distribution is proposed via the statistical analysis of the a posteriori symbols which are the outputs of the equalizers under different conditions.Probabilistic shaping is introduced to analyze and assess the capacity of the practical underwater acoustic communication system,and the Maxwell-Boltzmann distributions are used to perform probabilistic shaping on the output symbol of the equalizer.Finally,the capacities with different modulation modes are obtained by analyzing the multipath channel data of pool and lake experiments.The results show that the maximum improvement of the channel capacity by using probabilistic shaping over the conventional equiprobability mapping is 0.5 bits/symbol,in the specific signal-to-noise ratio(SNR)region. | WU Xisheng WU Yanbo ZHU Min LI Dong FANG Xiaofang | 2021 | Chinese Journal of Acoustics2021，40，3： | 1 |
| 11 | Clay mineral distribution characteristics of surface sediments in the South Mid-Atlantic Ridge显示文摘Clay minerals are usually considered as important indicators to identify sources in both terrigenous and marine sediments.In particular,clay minerals in metalliferous sediments(MS)have long been studied in global oceans except in South Mid-Atlantic Ridge(SMAR)due to limited explorations.Thus,32 MS and 34 non-MS(NMS)samples were analyzed to clarify the distribution characteristics and mineral compositions of clay minerals.All the sediments were collected along the SMAR between 12°S and 27°S.After removal of organic matter and carbonate,clay fractions(<2μm)were investigated by Xray diffraction(XRD)analysis.Results show that clay mineral assemblages of surface MS consist dominantly of smectite,less abundant illite,chlorite,and kaolinite in average weight percentage of 30%,21%,18%,and 16%,respectively.On the other hand,clay mineral assemblages in the NMS consist mainly of illite,less abundant kaolinite,chlorite,and very scarce smectite in average weight percentage of 47%,29%,24%,and 0.2%,respectively.The clay fractions in MS are mainly composed of amorphous or poorly crystallized Fe/Mn oxyhydroxides,clay mineral,quartz,and plagioclase.However,the counterparts in the NMS are mainly composed of well-crystallized clay minerals,quartz,and plagioclase without the presence of Fe/Mn oxyhydroxides.It is suggested that most of the illite,kaolinite,and chlorite in both MS and NMS are likely aeolian dust in origin from South Africa continent.In addition,the abundance of kaolinite dominates the clay mineral assemblage at low latitudes,where the intensive chemical weathering of continental source rocks facilitating the formation of kaolinite.In terms of smectite,it is indicated of authigenic origin in consideration of only smectite is available in several MS and the absence in NMS.Moreover,the MS samples with only smectite available are always accompanied by goethite.Therefore,it is assumed that most of smectite occurred in studied area is the results of interaction between hydrothermal Fe-oxyhydroxide,silica,and seawater. | Qiannan HU Chuanshun LI Baoju YANG Xisheng FANG Huahua LÜ Xuefa SHI Jihua LIU | 2023 | Journal of Oceanology and Limnology2023，41，3： | 0 |
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