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Regulating Li^(+)migration and Li_(2)S deposition by metal-organic framework-derived Co_(4)S_(3)-embedded carbon nanoarrays for durable lithium-sulfur batteries

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Science China Materials 2022年第4期65卷 947-957页

作者： Jianbin Liu Yifan Song cunjian lin Qingshui Xie Dong-Liang Peng Rong-Jun Xie College of Materials Xiamen UniversityXiamen36005China Fujian Provincial Key Laboratory of Materials Genome Xiamen UniversityXiamen361005China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen61005China

The shuttle effect of lithium polysulfides and the uncontrollable deposition of lithium sulfides(Li_(2)S)severely hinder the realization of high-performance lithium-sulfur(Li-S)***,we fabricated a carbon cloth(CC)-based self-supported interlayer(denoted as Co_(4)S_(3)/C@CC),which is covered with Co_(4)S_(3)-embedded porous carbon nanoarrays through a facile two-step method with cobalt-based metal-organic framework(Co-MOF)nanosheets as the *** interconnected carbon network and the polar Co_(4)S_(3) nanoparticles in the Co_(4)S_(3)/C@CC interlayer not only effectively suppress the polysulfide shuttle,but also significantly facilitate the lithium ion(Li^(+))conduction with a considerable Li^(+)transference number of ***,the rich interfaces between the polar Co_(4)S_(3) nanoparticles and the conductive carbon substrate serve as reaction sites to accelerate the polysulfide conversion and guide the flower-like growth of Li_(2)S,which ultimately mitigates the interlayer surface passivation and improves the sulfur ***,the Li-S batteries with the Co_(4)S_(3)/C@CC interlayer deliver an excellent rate capacity(368.7 mA h g^(−1) at 10 C),a stable cycling performance(a low fading rate of 0.045%per cycle over 1400 cycles at 2.0 C),and a high initial areal capacity(4.83 mA h cm^(−2) at 0.2 C under a sulfur loading of 4.6 mg cm^(−2)).This work provides a perspective on the self-supported catalytic interlayer for the selective Li^(+)conduction and Li_(2)S regulation toward high-performance Li-S batteries.

关键词： metal-organic frameworks self-supported interlayer selective Li+conduction flower-like Li_(2)S deposition lithiumsulfur batteries

四川石棉森林碳密度空间数据知识挖掘及分布特征分析

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地球信息科学学报 2011年第5期13卷 579-585页

作者：杨存建倪静张洋牟琳四川师范大学西南土地资源评价与监测教育部重点实验室遥感与GIS中心成都610068

森林植被碳密度是衡量森林生态系统服务功能和产品供给功能高低的一个重要指标。本文以四川省石棉县为例,在森林资源二类调查数据的基础上,提出建立森林植被生物量、碳量及其密度GIS数据库,开展其碳密度分布知识发现的研究,从中发现了... 详细信息

森林植被碳密度是衡量森林生态系统服务功能和产品供给功能高低的一个重要指标。本文以四川省石棉县为例,在森林资源二类调查数据的基础上,提出建立森林植被生物量、碳量及其密度GIS数据库,开展其碳密度分布知识发现的研究,从中发现了该县碳密度分布知识。该县有林地森林植被碳量达到364万t,冷杉、云杉、铁杉和桦木占总碳量的83%;有林地森林植被碳密度为40t/hm2,其云杉和冷杉分别为47t/hm2和43t/hm2;碳量随坡度等级的增加而增加,25°以上坡地的森林植被碳量占总碳量的91%;25°以上森林植被碳密度比25°以下森林植被的碳密度高。微度与中度土壤侵蚀下的森林植被碳密度较高,在42t/hm2以上;剧烈与极强侵蚀下的森林植被碳密度相对较低,为29t/hm2。森林植被碳密度与郁闭度之间在0.05的水平上显著相关。研究表明,该县冷杉与云杉林保护较好,25°以上区域的森林保护较好,因此,具有较高的森林植被碳密度。森林植被碳密度越高的区域,其水土侵蚀强度越低。该研究成果对加强该县森林资源的保护,特别是该县国家与省级自然保护区的保护建设具有重要意义。

关键词：森林生物量碳密度

Adjuvant chemotherapy versus adjuvant concurrent chemoradiotherapy after radical surgery for early-stage cervical cancer:a randomized,non-inferiority,multicenter trial

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Frontiers of Medicine 2023年第1期17卷 93-104页

作者： Danhui Weng Huihua Xiong Changkun Zhu Xiaoyun Wan Yaxia Chen Xinyu Wang Youzhong Zhang Jie Jiang Xi Zhang Qinglei Gao Gang Chen Hui Xing Changyu Wang Kezhen Li Yaheng Chen Yuyan Mao Dongxiao Hu Zimin Pan Qingqin Chen Baoxia Cui Kun Song cunjian Yi Guangcai Peng Xiaobing Han Ruifang An Liangsheng Fan Wei Wang Tingchuan Xiong Yile Chen Zhenzi Tang lin Li Xingsheng Yang Xiaodong Cheng Weiguo Lu Hui Wang Beihua Kong Xing Xie Ding Ma Department of Obstetrics and Gynecology Tongji Hospital of Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Oncology Tongji Hospital of Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Gynecologic Oncology Women’s HospitalSchool of MedicineZhejiang UniversityHangzhou 310006China Department of Obstetrics and Gynecology Qilu HospitalShandong UniversityJinan 250012China Department of Obstetrics and Gynecology Xiangyang Central HospitalHubei University of Arts and ScienceXiangyang 441021China Department of Obstetrics and Gynecology The First Affiliated Hospital of Yangtze UniversityJingmen 448000China Department of Obstetrics and Gynecology The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061China Department of Obstetrics and Gynecology The First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510120China Department of Gynecologic Oncology Affiliated Tumour HospitalXinjiang Medical UniversityUrumqi 830000China Department of Gynecologic Oncology Hunan Province Tumor HospitalChangsha 410013China

We conducted a prospective study to assess the non-inferiority of adjuvant chemotherapy alone versus adjuvant concurrent chemoradiotherapy (CCRT) as an alternative strategy for patients with early-stage (FIGO 2009 stage IB–IIA) cervical cancer having risk factors after surgery. The condition was assessed in terms of prognosis, adverse effects, and quality of life. This randomized trial involved nine centers across China. Eligible patients were randomized to receive adjuvant chemotherapy or CCRT after surgery. The primary end-point was progression-free survival (PFS). From December 2012 to December 2014, 337 patients were subjected to randomization. Final analysis included 329 patients, including 165 in the adjuvant chemotherapy group and 164 in the adjuvant CCRT group. The median follow-up was 72.1 months. The three-year PFS rates were both 91.9%, and the five-year OS was 90.6% versus 90.0% in adjuvant chemotherapy and CCRT groups, respectively. No significant differences were observed in the PFS or OS between groups. The adjusted HR for PFS was 0.854 (95% confidence interval 0.415–1.757;P = 0.667) favoring adjuvant chemotherapy, excluding the predefined non-inferiority boundary of 1.9. The chemotherapy group showed a tendency toward good quality of life. In comparison with post-operative adjuvant CCRT, adjuvant chemotherapy treatment showed non-inferior efficacy in patients with early-stage cervical cancer having pathological risk factors. Adjuvant chemotherapy alone is a favorable alternative post-operative treatment.

关键词： chemotherapy cervical cancer lymph node metastasis concurrent chemoradiotherapy quality of life

山地丘陵区林州市的国土空间格局与生境演变分析

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生态科学 2020年第5期39卷 26-33页

作者：廖雨冉丹阳张丽芳李佳玉杨存建四川师范大学地理与资源科学学院成都610101 四川师范大学西南土地资源评价与监测教育部重点实验室成都610068

针对山地丘陵区国土空间格局快速演变及生态环境安全问题,以林州市为例,利用林州市1990年、2000年、2010年、2015年土地利用数据,采用土地转移矩阵、景观格局指数、INVEST模型分析林州市国土空间转化类型及时空格局特征、景观格局下的... 详细信息

针对山地丘陵区国土空间格局快速演变及生态环境安全问题,以林州市为例,利用林州市1990年、2000年、2010年、2015年土地利用数据,采用土地转移矩阵、景观格局指数、INVEST模型分析林州市国土空间转化类型及时空格局特征、景观格局下的生态退化程度。结果表明:(1)1990-2015年间,生活空间逐年增加,生产空间减少,生态空间小幅度波动变化。生产空间用地减少了3.23%,其中转为生活空间用地的面积占其减少面积的89.67%,转为生态空间用地的面积占其减少面积的10.53%。(2)1990-2015年间,虽然林州市生态空间用地增加,但是生活空间用地的进一步扩张,使得斑块破碎化程度加大,景观连通性减弱。各土地利用类型中,城镇生活空间集聚程度较高,生产、生态空间用地破碎化程度逐渐加大。(3)1990-2015年间,林州市由于国土空间格局的改变引起景观格局趋于破碎化,从而导致生境退化程度不断增加,其中中心城区的生境退化程度最高,是林州市未来规划发展的敏感区域。

关键词：三生空间生境退化景观格局 INVEST模型林州市