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Glacier changes in the Qaidam Basin from 1977 to 2018

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Research in Cold and Arid Regions 2020年第6期12卷 491-502页

作者： SuGang Zhou XiaoJun Yao Yuan zhang dahong zhang Juan Liu HongYu Duan College of Geography and Environmental Science Northwest Normal UniversityLanzhouGansu 730070China

Based on Landsat MSS/TM/OLI remote sensing images,glaciers vector data in the Qaidam Basin were extracted for 1977,2002,and 2018,and their spatial-temporal variations were *** show that there were 2,050 glaciers covering an area of 1,693.54±40.96 km2 and having an ice volume of 108.65±2.43 km^3 in the Qaidam Basin in *** with areas<1.0 km2 accounted for the largest number,while glaciers with areas of 1.0−5.0 km2 accounted for the most glacierized *** the past 50 years,the number of glaciers decreased by 177,and the glacier area and volume reduced by 338.08 km2(−8.12 km^2/a)and 19.92 km3(−0.48 km^3/a),*** altitudes of glaciers were concentrated at 4,900−5,600 m,4,700−5,200 m,and 5,000−5,600 m and reduced areas accounted for 95.53%,77.80%,and 69.19%in the Kunlun,Qilian,and Altun mountains,*** area of north-oriented glaciers decreased the most(−125.43 km^2),but the west-and east-oriented glaciers retreated at the fastest rate(i.e.,−27.11%and−27.10%).All glaciers showed a decreasing trend in sub-regions of the Qaidam Basin from 1977 to *** decreasing trend was accelerated gradually from northwest to southeast in the northern part of the basin,while glacier change was the smallest in the middle section and gradually accelerated towards both ends of the basin's southern *** temperature had continued to rise,and the precipitation had increased slowly in the Qaidam Basin during the past 50 *** continuous rise in air temperature was the main reason for the retreat of glaciers.

关键词： glacier change climate change Landsat Qaidam Basin

腹腔镜根治性前列腺切除术中并发直肠损伤的处理经验

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中华泌尿外科杂志 2019年第8期40卷 592-595页

作者：王帅张大宏浙江省人民医院杭州医学院附属人民医院泌尿外科杭州 310014

目的总结腹腔镜根治性前列腺切除术中并发直肠损伤的处理经验。方法回顾性分析2015年1月至2018年10月浙江省人民医院行腹腔镜根治性前列腺切除术中并发直肠损伤的3例患者的临床资料。年龄69~79岁,平均74.3岁;体质指数25.6~28.6 kg/m2,平... 详细信息

目的总结腹腔镜根治性前列腺切除术中并发直肠损伤的处理经验。方法回顾性分析2015年1月至2018年10月浙江省人民医院行腹腔镜根治性前列腺切除术中并发直肠损伤的3例患者的临床资料。年龄69~79岁,平均74.3岁;体质指数25.6~28.6 kg/m2,平均27.1 kg/m2;术前PSA 5.7~74.1 ng/ml,平均32.7 ng/ml;前列腺体积55.2~80.3 ml,平均65.3 ml;术前TNM分期T1b^3aN0M0期;术前Gleason评分6~8分,平均7分。1例术前行新辅助内分泌治疗,1例术前3个月行前列腺钬激光剜除术。3例行腹腔镜根治性前列腺切除术过程中,1例在分离前列腺尖部时损伤直肠前壁,2例在分离狄氏筋膜时损伤直肠前壁。术中并发直肠损伤后,勿过多翻动检查创面,避免扩大损伤,找到正确层面先继续完成前列腺的切除,然后用大量稀释碘伏溶液反复冲洗创面,根据创口组织条件做创口修剪,用3-0可吸收线分3层(直肠黏膜层、直肠壁外层、狄氏筋膜后层)缝合,再用释碘伏和生理盐水冲洗创面后完成尿道吻合。结果手术时间138~210 min,平均166.7 min;直肠修补时间30~41 min,平均34.3 min。术中出血量110~215 ml,平均158.3 ml。术中破口长径1.0~1.5 cm,平均1.2 cm。术后恢复进食时间6~7 d,平均6.3 d;术后留置导尿管时间10~14 d,平均12.3 d。术后肿瘤病理分期T2~3bN0M0期;Gleason评分6~9分,平均7分;1例尖部阳性。3例术后均未出现直肠尿道瘘和腹腔感染。2例术后行辅助内分泌治疗。3例术后随访1年未出现生化复发。结论在良好的术前肠道准备、术中创口小且创缘较整齐的情况下,腹腔镜下一期3层缝合直肠破口可较好地修复根治性前列腺切除术中直肠损伤,且不需要回肠预防性造口。

关键词：前列腺切除术腹腔镜直肠损伤

A Comparative Study of Analytical Solutions to the Coupled Van-der-Pol’s Non-linear Circuits Using the He’s Method(HPEM)and(BPES)

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Circuits and Systems 2011年第3期2卷 196-200页

作者： Huseyin Kocak Ahmet Yildirim dahong zhang Karem Boubaker Syed Tauseef Mohyud-Din Department of Mathematics Ege UniversityBornova–IzmirTurkey Department of Physics South China UniversityGuangzhouChina Ecole Superieure des Sciences et Techniques de Tunis University of TunisTunisTunisia Department of Basic Sciences HITEC UniversityTaxila CanttPakistan

In this paper, the He’s parameter-expanding method (HPEM) and the 4q-Boubaker Polynomials Expansion Scheme (BPES) are used in order to obtain analytical solutions to the non-linear modified Van der Pol’s oscillating circuit equation. The resolution protocols are applied to the ordinary Van der Pol equation, which annexed to conjoint delayed feedback and delay-related damping terms. The results are plotted, and compared with exact solutions proposed elsewhere, in order to evaluate accuracy.

关键词： Van-der-Pol’s Oscillating Circuit Delayed Feedback Damping BPES HPEM Exact Solutions Electrical Triode-Valve Circuit

基于MODIS数据的中国气溶胶光学厚度时空分布特征

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环境科学学报 2018年第11期38卷 4431-4439页

作者：张亮林潘竟虎张大弘西北师范大学地理与环境科学学院兰州730070

利用Aqua/MODIS C006大气气溶胶光学厚度(AOD)遥感数据,统计了中国2007—2017年的AOD值,对11年间AOD的空间分布特征及年际和四季变化特征进行分析,并采用Theil-Sen Median趋势分析、标准偏差和Hurst指数3种方法,分析了基于像元的中国大... 详细信息

利用Aqua/MODIS C006大气气溶胶光学厚度(AOD)遥感数据,统计了中国2007—2017年的AOD值,对11年间AOD的空间分布特征及年际和四季变化特征进行分析,并采用Theil-Sen Median趋势分析、标准偏差和Hurst指数3种方法,分析了基于像元的中国大陆地区AOD时空变化特征.结果表明:①空间特征:11年间AOD分布具有东部高、西部低,东部减少、西部基本不变的特征;②时间特征:AOD变化在年际间呈余弦曲线式波动下降的特征,最高值出现在2007年,为0.34,最低值出现在2016年,为0.22,11年间AOD平均值下降了35.29%;年内AOD值表现出春夏高(0.33/0.32),秋季次之(0.26),冬季最小(0.15)的季节变化特征;③稳定性与持续性:东部稳定性差但集聚、西部稳定性好但分散,东西差异显著;中国AOD持续性特征以弱反持续性为主,弱持续和弱反持续镶嵌分布,西北干旱区表现为强反持续性的特点.

关键词：气溶胶光学厚度(AOD) MODIS 时空分布中国

Cystic pheochromocytoma: A rare cause of adrenal incidentaloma

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Cystic pheochromocytoma: A rare cause of adrenal incidentalo...

挽救性淋巴结清扫术在前列腺癌根治性治疗后淋巴结复发患者中的应用进展

2019年浙江省医学会泌尿外科学、男科学学术大会

作者： Fei Xiang Zujie Mao Shuai Wang Ming Zhao dahong zhang Zhejiang Provincial People's Hospital

Objective To report a case of cystic pheochromocytoma who was initially referred for adrenal incidentaloma to raise awareness of this rare entity and its treatment *** In this case we report a 58-year-old woman who was referred for left adrenal incidentaloma after computed tomography (CT). She was asymptomatic and normotensive. Contrast CT showed a 5.0 x 4.0 x 4.9 cm hypodense left adrenal mass with enhanced thick wall. Her blood counts, liver and renal functions, electrocardiogram were within normal ranges.

关键词： A rare cause of adrenal incidentaloma Cystic pheochromocytoma

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中华泌尿外科杂志 2021年第9期42卷 717-720页

作者：何为张琦张大宏浙江省人民医院泌尿外科杭州医学院附属人民医院杭州医学院泌尿外科研究所杭州310014

根治性前列腺切除术是治疗局限性前列腺癌的金标准,但术后生化复发率可达到20%~50%。在某些情况下,挽救性淋巴结清扫术(SLND)可改善肿瘤控制并延迟全身治疗。本文总结目前适合行SLND的患者选择、SLND术式的探索以及SLND的安全性和肿瘤... 详细信息

根治性前列腺切除术是治疗局限性前列腺癌的金标准,但术后生化复发率可达到20%~50%。在某些情况下,挽救性淋巴结清扫术(SLND)可改善肿瘤控制并延迟全身治疗。本文总结目前适合行SLND的患者选择、SLND术式的探索以及SLND的安全性和肿瘤控制效果。尽管目前仍缺乏支持SLND的前瞻性研究证据,但是术前成像技术的进步以及微创手术的广泛使用,使SLND显示出较好的肿瘤控制效果,但仍需大规模、标准化的临床试验进一步验证SLND的有效性和安全性。

关键词：前列腺肿瘤挽救性淋巴结清扫术生化复发

省域森林生态安全评价——基于5省的经验数据

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生态学报 2017年第18期37卷 6229-6239页

作者：顾艳红张大红北京林业大学理学院北京100083 北京林业大学经济管理学院北京100083

生态安全是国家安全体系的重要组成部分。面对严峻的生态环境形势,以及大气污染、水污染、土壤污染等严重的生态环境问题,改善生态环境的需求和呼声越来越迫切。作为陆地生态系统的主体和重要资源,森林是人类生存发展的重要生态保障,森... 详细信息

生态安全是国家安全体系的重要组成部分。面对严峻的生态环境形势,以及大气污染、水污染、土壤污染等严重的生态环境问题,改善生态环境的需求和呼声越来越迫切。作为陆地生态系统的主体和重要资源,森林是人类生存发展的重要生态保障,森林关系国家生态安全。基于森林生态系统与自然、人类社会系统的交互关系,从森林资源状况、地理气候条件、地区社会经济压力、人类管护响应状况四个方面构建省域森林生态安全评价指标体系,并建立森林生态安全指数模型。选取我国五个具有代表性的省份:贵州、湖北、浙江、吉林、青海作为试点省份,对其2004—2014年的森林生态安全状况进行评价和对比。结果表明:影响森林生态安全状况的最主要因素是森林资源类因子,在研究期内,5省森林生态安全状况大体上处于改善状态,但省与省之间森林生态安全状况差异显著,吉林省在研究期内森林生态安全整体状况最好,青海省森林生态安全状况较脆弱。在发展经济的同时,应该加强造林,重视对森林资源的管护,尤其要注意对天然林的保护,维护森林生态安全。

关键词：森林生态安全指标体系评价模型评价分析

Dry Lab Training:3D Printed Models to Simulate Robotic Assisted Antireflux Surgery

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Dry Lab Training:3D Printed Models to Simulate Robotic Assis...

Who took it away and who should return the due surgical training to the Chinese Surgical residents?

2018年浙江省外科学学术年会

作者： Zhifei Wang Jiye zhang Yi Lu Junwei Liu Wei Sun Luning Wu dahong zhang Department of Hepatobiliary and Pancreatic Surgery Zhejiang Provincial People’s Hospital

Background:Due to its very recent introduction,Chinese surgeons are relatively new to antireflux *** experience with both laparoscopic antireflux surgery and robotic surgery renders robotic antireflux surgery extremely challenging in *** training is instrumental in helping advance Nissen fundoplication(NF) learning curve amongst surgeons new to complex robotic assisted *** of three-dimensional(3 D) printed dry lab models is proposed for robotic assisted antireflux surgery ***:3 D printed dry lab models were designed to simulate the surgical antireflux *** training consisted of 10 simulated robot-assisted Nissen fundoplications of the 3 D *** surgeon underwent training between his first and second cases of robotic assisted antireflux *** performance during the two preand post-training clinical cases was assessed,measured as operation completion times and patient outcomes through 6 months ***:Marked improvement was achieved after the *** operations were performed uneventfully,with total operation time reduced from 156.5 min to 117.9 min with the *** patients recovered *** first patient complained of upper abdominal pain and was released at 5 months when symptoms were *** and gastroscopy were performed with no abnormality ***:3 D printed dry lab model simulating antireflux surgery scenarios can be employed in surgeon training for robotic assisted antireflux *** introduction of this dry lab training will help bridge the learning curve for robotic Nissen fundoplication from early lab training to the clinical *** more cases are needed to evaluate its effectiveness,the specifically designed set of dry lab training models was rated favorably by participating and assessing surgeons for both anatomic realism and potential as a training tool for advancing robotic fundoplication skill.

关键词： antireflux surgey 3D printing dry lab model learning curve training

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Who took it away and who should return the due surgical trai...