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Alternating influences of the Westerlies and Indian Summer Monsoon on the hydroclimate of the source region of the Yarlung Tsangpo over past 4000 yr

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Frontiers of Earth Science 2023年第4期17卷 933-944页

作者： Zhe SUN Zirui HUANG kejia ji Mingda WANG Juzhi HOU Institute of Geography and Resources Science Sichuan Normal UniversityChengdu 610066China Group of Alpine Paleoecology and Human Adaptation(ALPHA) State Key Laboratory of Tibetan Plateau Earth SystemResources and Environment(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China CAS Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Sciences(CAS)Beijing 100101China School of Geography Liaoning Normal UniversityDalian 116029China

The Yarlung Tsangpo,the longest river in the southern Tibetan Plateau(TP),has attracted much research attention aimed at understanding the factors controlling its modern hydrology and possible future discharge in the context of ongoing climate ***,partly due to the complex regional climatic background,no consistent conclusions have been reached,especially for its upper *** reconstructions of the source region of the Yarlung Tsangpo can potentially improve our understanding of the history of humidity and its response to climatic *** this study,we used a 97 cm gravity core from Gongzhu Co to reconstruct the hydrology change during the late *** core was dated using AMS ^(14)C and Pb/Cs methods,and we used measurements of element contents(determined by high-resolution XRF scanning),grain size,IC/TOC,and magnetic susceptibility to reconstruct hydroclimatic changes in the source of the Yarlung Tsangpo watershed since~4000 yr *** with a modern meteorological data set,we found that PC1 of the XRF data,the Ca/(Fe+Ti)ratio,and EM1 of the grain size data were indicative of changes in *** records demonstrate a wet interval during~4-1.7 ka BP(ka=1000 yr,BP represents years before 1950 AD),followed by a dry period during since~1 ka *** with independent regional paleoclimatic records revealed shifts in the dominant factors controlling *** wet interval during~4-1.7 ka BP was coeval with a strengthened Westerlies,implying a dominant moisture supply from northern high ***,the extremely low values of Ca/(Fe+Ti)ratio during~4-2.5 ka BP indicate potential glacial freshwater source,which is corroborated by the concurrent high magnetic susceptibility values and increased grain *** rapid drying trend during~1.7-1 ka BP suggests a switch in moisture supply from the Westerlies to the Indian Summer Monsoon(ISM).We attribute the drought conditions after~1 ka BP to a weakened ISM,althoug

关键词： late Holocene humidity changes Westerlies ISM Yarluang Tsangpo

23例儿童肾性低钾血症的临床表现及遗传学病因分析

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中国优生与遗传杂志 2024年第4期32卷 727-733页

作者：朱彤张改秀纪可佳赵润涵王紫薇王妮娜山西医科大学儿科教研室山西太原030000 山西省儿童医院内分泌与遗传代谢科山西太原030000

目的探讨不同病因所致儿童肾性低钾血症的临床表现及遗传学特点。方法回顾性分析2010—2023年在山西省儿童医院诊治的23例肾性低钾血症患儿的临床资料及基因检测结果。结果23例患儿中有男性15例,女性8例,初诊时临床表现按发生率高低依... 详细信息

目的探讨不同病因所致儿童肾性低钾血症的临床表现及遗传学特点。方法回顾性分析2010—2023年在山西省儿童医院诊治的23例肾性低钾血症患儿的临床资料及基因检测结果。结果23例患儿中有男性15例,女性8例,初诊时临床表现按发生率高低依次为生长发育落后,呕吐、腹泻,多饮多尿,肌无力,便秘,高血压,手足搐搦,脱水,喂养困难等。实验室检查主要表现为低血钾、24小时尿电解质结果的异常、部分伴有肾素血管紧张素醛固酮活性的改变。对23例患儿采取全外显子组测序,并对其标准家系成员进行Sanger测序技术验证其变异位点,共发现8种基因突变,包括CLCNKB、SLC12A1、SLC12A3、CFTR、CYP17A1、HSD11B2、NPHP1、ATP6V0A4基因,其中以CLCNKB基因突变导致的3型Bartter综合征及SLC12A3基因突变导致的Gitelman综合征多见。结论儿童肾性低钾血症的临床表现缺乏特异性,病因以遗传因素为主,详细的实验室检查及基因检测可以及早明确诊断,为遗传咨询提供依据。

关键词：低钾血症遗传性肾小管疾病 Bartter综合征 Gitelman综合征

DYNAMIC ADVANCED PLANNING AND SCHEDULING WITH FROZEN INTERVAL FOR NEW ORDERS

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Chinese Journal of Mechanical Engineering 2007年第4期20卷 117-119页

作者： CHEN kejia ji Ping Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Hong Kong China

A dynamic advanced planning and scheduling （DAPS） problem is addressed where new orders arrive on a continuous basis. A periodic policy with frozen interval is adopted to increase stability on the shop floor. A genetic algorithm is developed to find a schedule at each rescheduling point for both original orders and new orders that both production idle time and penalties on tardiness and earliness of orders are minimized. The proposed methodology is tested on a small example to illustrate the effect of the frozen interval. The results indicate that the suggested approach can improve the schedule stability while retaining efficiency.

关键词： Dynamic advanced planning and scheduling Genetic algorithm Frozen interval

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戊二酸血症Ⅰ型病儿5例临床及基因突变分析

安徽医药 2024年第8期28卷 1629-1632页

作者：范馨张改秀朱彤纪可佳赵润涵王蕾王丽花山西医科大学儿科教研室山西太原030001 山西省儿童医院内分泌与遗传代谢科山西太原030001

目的回顾性分析5例确诊戊二酸血症Ⅰ型病儿临床特点及戊二酰辅酶A脱氢酶(GCDH)基因突变情况,为临床诊治提供参考依据及产前诊断提供借鉴。方法回顾性分析山西省儿童医院2019年1月至2022年12月收治及随访的5例戊二酸血症Ⅰ型病儿临床资... 详细信息

目的回顾性分析5例确诊戊二酸血症Ⅰ型病儿临床特点及戊二酰辅酶A脱氢酶(GCDH)基因突变情况,为临床诊治提供参考依据及产前诊断提供借鉴。方法回顾性分析山西省儿童医院2019年1月至2022年12月收治及随访的5例戊二酸血症Ⅰ型病儿临床资料及基因检测结果。结果5例病儿中男4例,女1例,5例病儿就诊年龄分别为8个月26 d、3个月24 d、4个月8 d、10个月25 d、1个月5 d。5例病儿的临床表型各异。3例经新生儿筛查确诊,2例因运动发育落后经遗传代谢病检测确诊,其中1例以抽搐为首发症状,2例出现运动发育落后且1例伴有运动发育倒退。5例病儿血戊二酰肉碱及比值均升高、尿戊二酸水平均增高。基因检测证实5例病儿均为复合杂合突变,以错义突变为主。结论5例病儿中有3例病儿是通过新生儿疾病筛查发现的,新生儿串联质谱筛查可以对于戊二酸血症病儿的早期诊断、早期治疗及预后具有重要的意义;戊二酸血症Ⅰ型病儿临床表现具有明显异质性,对临床可疑的病儿可进行血串联质谱检测、尿气相色谱分析及基因检测,以便进行早期严格的干预治疗及饮食管理,从而改善预后;此外,该研究发现了1个新的GCDH基因突变位点,丰富了GCDH基因的突变谱。

关键词：戊二酸血症Ⅰ型 GCDH基因基因突变

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Lacustrine Record of 1954 Flood Event on Begnas and Rupa Lake, Central Nepal

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Acta Geologica Sinica(English Edition) 2020年第3期94卷 717-724页

作者： Sudip ACHARYA LI Can-Ge ji kejia SUN Zhe WANG Mingda HOU Juzhi Key Laboratory of Alpine Ecology Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China CAS Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing 100101China

In recent decades, there have been discussions and predictions regarding the impact of climate on floods, due to its socioeconomic and environmental consequences. For accurate prediction of future flood events and their impacts, it is crucial to have an improved understanding on past flood events. Lacustrine sediments have been used as a natural archive to study the past flood events. Here, we study the impact of 1954 flood event on the lacustrine environment of Bengas and Rupa Lake in central Nepal based on X-ray fluorescence spectrometry(XRF) element analysis, magnetic susceptibility(MS), total organic carbon(TOC) and the biomarker molecular compositions. Results showed that 1954 flood event had significant impacts on the two lakes in terms of detrital input, organic matter deposition and aquatic production. Before the flood event, both two studied lakes had relatively lower catchment erosion rate, lower organic matter deposition and aquatic production. During the flood event, catchment erosion and aquatic production increased in both lakes due to mass transport deposits and the increased nutrition loading attributed to flood event. Following the flood event, Begnas Lake showed the sharp increase in organic matter deposition, whereas in the Rupa Lake organic matter deposition showed minor changes. The difference in organic matter deposition in lakes during flooding event is likely due to detrital material brought and deposited by the flood activity. Overall our results suggest that lacustrine sediments are sensitive to the extreme event and would be an ideal archive for the reconstruction of flood events.

关键词： flood lacustrine environment Begnas Lake Rupa Lake Central Nepal

Spin Evolution of the Magnetar SGR J1935+2154

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Research in Astronomy and Astrophysics 2024年第1期24卷 201-211页

作者： Ming-Yu Ge Yuan-Pei Yang Fang-Jun Lu Shi-Qi Zhou Long ji Shuang-Nan Zhang Bing Zhang Liang Zhang Pei Wang kejia Lee Weiwei Zhu jian Li Xian Hou Qiao-Chu Li Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China South-Western Institute For Astronomy Research Yunnan UniversityKunming 650504China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China Key Laboratory of Stellar and Interstellar Physics and School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China School of Physics and Astronomy Sun Yat-Sen UniversityZhuhai 519082China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China Nevada Center for Astrophysics University of NevadaLas VegasNV 89154USA Department of Physics and Astronomy University of NevadaLas VegasNV 89154USA National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Department of Astronomy Peking UniversityBeijing 100871China CAS Key Laboratory for Research in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of ChinaHefei 230026China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China Yunnan Observatories Chinese Academy of SciencesKunming 650216China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Key laboratory of Modern Astronomy and Astrophysics Nanjing UniversityNanjing 210023China

Fast radio bursts(FRBs)are short pulses observed in radio frequencies usually originating from cosmological *** discovery of FRB 200428 and its X-ray counterpart from the Galactic magnetar SGR J1935+2154suggests that at least some FRBs can be generated by ***,the majority of X-ray bursts from magnetars are not associated with radio *** fact that only in rare cases can an FRB be generated raises the question regarding the special triggering mechanism of *** we report long time spin evolution of SGR J1935+2154 until the end of *** to v and v,the spin evolution of SGR J1935+2154 could be divided into two *** first stage evolves relatively steady evolution until 2020 April *** the burst activity in2020,the spin of SGR J1935+2154 shows strong variations,especially for *** the burst activity in 2022October,a new spin-down glitch with△v/v=(-7.2±0.6)×10^(-6)is detected around MJD 59876,which is the second event in SGR J1935+*** the end,spin frequency and pulse profile do not show variations around the time of FRB 200428 and radio bursts 221014 and 221021,which supply strong clues to constrain the trigger mechanism of FRBs or radio bursts.

关键词： (stars:)pulsars:general (stars:)pulsars:individual(SGR J1935+2154) X-rays:bursts

DYNAMIC ADVANCED PLANNING AND SCHEDULING （DAPS） WITH FROZEN INTERVAL FOR NEW ORDERS

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DYNAMIC ADVANCED PLANNING AND SCHEDULING （DAPS） WITH FROZE...

垂直专业化视角下人民币汇率变动对企业出口关系的影响

2005年中国机械工程学会年会

作者： CHEN kejia, ji PING (Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong, China)

＜正＞This paper addresses a dynamic advanced planning and scheduling （DAPS） problem where new orders arrive on a continuous basis. A periodic policy with frozen interval is adopted to increase stability on the shop floor. A genetic algorithm is developed to find a schedule at each rescheduling point for both original orders and new orders that both production idle time and penalties on tardiness and earliness of orders are minimized. The proposed methodology is tested on a small example to illustrate the effect of the frozen interval. The results indicate that the suggested approach can improve the schedule stability while retaining efficiency.

关键词： dynamic advanced planning and scheduling genetic algorithm frozen interval

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国际贸易问题 2017年第7期 152-163页

作者：张明志季克佳厦门大学经济学院 361005

文章在Chatterjee等(2013)模型的基础上,引入垂直专业化的"成本效应"来研究汇率变动对企业出口关系的影响。基于2000-2006年中国工业企业数据和中国海关产品层面交易数据,文章实证结果显示:(1)人民币汇率升值降低了企业出口关系进入的概... 详细信息

文章在Chatterjee等(2013)模型的基础上,引入垂直专业化的"成本效应"来研究汇率变动对企业出口关系的影响。基于2000-2006年中国工业企业数据和中国海关产品层面交易数据,文章实证结果显示:(1)人民币汇率升值降低了企业出口关系进入的概率,垂直专业化水平的提高会降低人民币汇率升值对企业出口关系进入的抑制作用;(2)人民币汇率升值会提高企业出口关系退出的概率,而垂直专业化水平的上升会降低人民币汇率升值对企业出口关系退出的不利影响;(3)在控制垂直专业化影响的基础上,生产率越高、外资企业和融资约束越小的企业,人民币汇率升值对出口关系进入与退出的影响会越小。

关键词：汇率变动出口关系垂直专业化

青藏高原中部湖泊江错纹层记录的过去2000年降水变化

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第四纪研究 2021年第2期41卷 424-433页

作者：冀克家朱二雷储国强侯居峙中国科学院青藏高原研究所高寒生态重点实验室北京100101 中国科学院大学北京100049 中国科学院地质与地球物理研究所中国科学院新生代地质与环境重点实验室北京100029 中国科学院青藏高原地球科学卓越创新中心北京100101

青藏高原由于其环境的脆弱性容易受到气候变化和人类活动的影响,重建这一地区过去2000年高分辨率的气候变化记录有助于增加我们对气候变化和人类活动之间关系的理解。本文通过对江错湖泊一根长达101 cm的岩芯沉积物纹层分析,重建了青藏... 详细信息

青藏高原由于其环境的脆弱性容易受到气候变化和人类活动的影响,重建这一地区过去2000年高分辨率的气候变化记录有助于增加我们对气候变化和人类活动之间关系的理解。本文通过对江错湖泊一根长达101 cm的岩芯沉积物纹层分析,重建了青藏高原中部过去2000年的纹层年代序列和降水变化。利用岩相显微镜和电子探针显微分析仪分析发现,沉积物中发育了良好的碎屑-有机质年纹层,纹层层偶主要由粗颗粒碎屑层和细颗粒碎屑层组成,其间极薄的有机质层是鉴定年纹层的标志。江错的年纹层年代序列与独立的核素测年(~(210)Pb、~(137)Cs和~(14)C)结果基本一致,证明了年纹层的可靠性。基于对年纹层形成机制的分析,提出粗颗粒厚度百分比(coarse%)作为指示降水的新指标,粗颗粒物质主要由降水产生的径流将外源物质搬运到湖中,降水越多,搬运能力越强,粗粒颗粒物质相对含量也越多。这一指标与当地现代气象观测记录对比发现有较好的一致性。江错过去2000年的降水记录具有78~80 a和112~123 a两个百年尺度的周期波动特征,可能与Gleissberg太阳活动有关。在过去2000年中,该地区呈现出中世纪暖期(公元1000~1400年)降水多,小冰期(公元1400~1900年)降水少,现代暖期(公元1900年至今)降水多的特点,这与该地区其他的降水记录一致。

关键词：青藏高原纹层年代江错降水