检索结果-内蒙古大学图书馆

环境科学研究 2015年第8期28卷 1295-1301页

作者：崔晓宇何绪文曾萍邱光磊宋永会中国矿业大学(北京)化学与环境工程学院北京100083 中国环境科学研究院城市水环境研究室北京100012 中国环境科学研究院环境基准与风险评估国家重点实验室北京100012 新加坡国立大学化学工程系新加坡新加坡城117585

为实现黄连素废水的规模化处理,针对黄连素废水可生化性差、有机污染物浓度高等特点,采用UASB-MBR（升流式厌氧污泥床-膜生物反应器）组合工艺,利用微生物的生化反应去除废水中的高浓度有机物和黄连素,考察在不同HRT（水力停留时间）下C... 详细信息

为实现黄连素废水的规模化处理,针对黄连素废水可生化性差、有机污染物浓度高等特点,采用UASB-MBR（升流式厌氧污泥床-膜生物反应器）组合工艺,利用微生物的生化反应去除废水中的高浓度有机物和黄连素,考察在不同HRT（水力停留时间）下CODCr和黄连素的去除效果,并采用GC-MS（气相色谱-质谱联用仪）对系统进、出水中的特征污染物进行分析.结果表明：1在UASB与MBR的HRT分别为96、66 h,84、58 h,72、50 h,60、41 h,以及进水ρ（CODCr）和ρ（黄连素）分别为2 030.0-3 660.0和19.0-400.0 mg/L的条件下,CODCr和黄连素的平均去除率均可达到90.0%以上,出水ρ（CODCr）平均值低于150.0 mg/L,ρ（黄连素）平均值低于4.0 mg/L.2UASB与MBR的HRT分别为72、50 h为最佳运行条件.3UASB可以明显降低废水中特征污染物的种类和浓度,UASB出水经MBR处理后,废水中的11种主要特征污染物均得到有效降解.

关键词：制药废水抗生素黄连素 UASB-MBR组合工艺

来源：评论

学校读者我要写书评

暂无评论

同构型知识基础合作研发伙伴的优势

引用

科技管理研究 2018年第2期38卷 131-138页

作者：曾德明赵旭雯冯科湖南大学工商管理学院湖南长沙410082

在专利竞赛的压力下,企业普遍选择知识基础多元化、网络化路线。基于汽车产业1999—2010年专利数据和负二项混合回归模型的实证研究表明,企业自身知识基础多元化与创新产出正相关,而自身知识基础网络密度与创新产出负相关;合作研发伙伴... 详细信息

在专利竞赛的压力下,企业普遍选择知识基础多元化、网络化路线。基于汽车产业1999—2010年专利数据和负二项混合回归模型的实证研究表明,企业自身知识基础多元化与创新产出正相关,而自身知识基础网络密度与创新产出负相关;合作研发伙伴知识基础多元化正向调节自身知识基础多元化,合作研发伙伴知识基础网络密度正向调节自身知识基础网络密度。同构型合作研发伙伴有利于企业自身吸收能力的释放,对于提升其创新产出更有优势。

关键词：合作研发知识基础多元化知识基础网络创新产出

来源：评论

学校读者我要写书评

暂无评论

New biomarkers exploration and nomogram construction of prognostic and immune-related adverse events of advanced non-small cell lung cancer patients receiving immune checkpoint inhibitors

引用

RESPIRATORY RESEARCH 2023年第1期24卷 64-64页

作者： Lin, xuwen Chen, Xi Long, Xiang zeng, Chao Zhang, Zhihan Fang, Weiyi Xu, Ping Peking Univ Dept Pulm & Crit Care Med Shenzhen Hosp Shenzhen 518034 Guangdong Peoples R China Shantou Univ Med Coll Shantou 515041 Guangdong Peoples R China Southern Med Univ Canc Res Inst Sch Basic Med Sci Guangzhou 510515 Guangdong Peoples R China Southern Med Univ Integrated Hosp Tradit Chinese Med Canc Ctr Guangzhou 510315 Peoples R China

BackgroundImmune checkpoint inhibitors (ICIs) are regarded as the most promising treatment for advanced-stage non-small cell lung cancer (aNSCLC). Unfortunately, there has been no unified accuracy biomarkers and systematic model specifically identified for prognostic and severe immune-related adverse events (irAEs). Our goal was to discover new biomarkers and develop a publicly accessible method of identifying patients who may maximize benefit from *** retrospective study enrolled 138 aNSCLC patients receiving ICIs treatment. Progression-free survival (PFS) and severe irAEs were end-points. Data of demographic features, severe irAEs, and peripheral blood inflammatory-nutritional and immune indices before and after 1 or 2 cycles of ICIs were collected. Independent factors were selected by least absolute shrinkage and selection operator (LASSO) combined with multivariate analysis, and incorporated into nomogram construction. Internal validation was performed by applying area under curve (AUC), calibration plots, and decision *** nomograms with great predictive accuracy and discriminatory power were constructed in this study. Among them, two nomograms based on combined inflammatory-nutritional biomarkers were constructed for PFS (1 year-PFS and 2 year-PFS) and severe irAEs respectively, and one nomogram was constructed for 1 year-PFS based on immune indices. ESCLL nomogram (based on ECOG PS, preSII, changeCAR, changeLYM and postLDH) was constructed to assess PFS (1-, 2-year-AUC = 0.893 [95% CI 0.837-0.950], 0.828 [95% CI 0.721-0.935]). AdNLA nomogram (based on age, change-dNLR, changeLMR and postALI) was constructed to predict the risk of severe irAEs (AUC = 0.762 [95% CI 0.670-0.854]). NKT-B nomogram (based on change-CD3+CD56+CD16+NKT-like cells and change-B cells) was constructed to assess PFS (1-year-AUC = 0.872 [95% CI 0.764-0.965]). Although immune indices could not be modeled for severe irAEs prediction due to limited data, we were the

关键词： Immune Adverse events Lung cancer Biomarkers Nomogram

来源：评论

学校读者我要写书评

暂无评论

Marketization and Energy Poverty: Empirical Evidence from China

SSRN

引用

SSRN 2022年

作者： Shi, Xinjie zeng, Pei Qiu, Tongwei Jiang, Qiang Cui, Liu Gao, xuwen Peking University China

Along with economic growth, improving the quality of life of its citizens is a focal issue for the Chinese government. Energy poverty—a topic closely related to people’s quality of life—has received global attention. This article focuses on the relationship between marketization and energy poverty, estimating the intrinsic relationship between marketization and energy poverty by constructing panel data using the instrumental variable method. The study reveals a significant upward trend in marketization in China in recent years, with a concomitant decrease in energy poverty. The results confirm that marketization improves the quantity of energy supply and alleviates energy poverty, and that the quality of energy supply is also an effective way for marketization to impact energy poverty. However, this mechanism is mainly reflected in the fact that marketization increases the accumulation of human capital and promotes the use of clean energy, but not in the improvement of energy supply efficiency by marketization. Additionally, marketization-led increase in people’s income alleviates energy poverty. This study adds to the existing literature and provides important policy insights for market-based development and energy poverty reduction. © 2022, The Authors. All rights reserved.

关键词： Economic analysis

来源：评论

学校读者我要写书评

暂无评论

Mid-Miocene (17-11 Ma) Fast Exhumation in the Upper Jinsha River and its Implication for Regional Faulting in Southeast Tibet

SSRN

引用

SSRN 2023年

作者： Shen, xuwen Liu-zeng, Jing Shen, Xiaoming Ge, Yukui zeng, Xianyang Wang, Zijun Xing, Yukun Wang, Heng School of Earth System Science Tianjin University Tianjin300072 China National Institute of Natural Hazards Ministry of Emergency Management of China Beijing100085 China State Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing100029 China School of Geography Earth and Atmospheric Sciences University of Melbourne VIC3010 Australia

The rugged southeast (SE) Tibet hosts a network of evolving faults, many of which are poorly understood due to a lack of sedimentary records and poor accessibility. The Jinsha River fault zone (JRFZ) is vaguely considered as a major fault bounding the Chuan-Dian Block in the northwest, yet little is known about its tectonic evolution history, which hinders our clear understanding of the tectonic deformation pattern, process and geomorphic response of SE Tibet. Here, we collected 10 samples from the hanging wall of the Xiongsong reverse fault, one strand of the JRFZ, near Markam area and on the trunk of the upper Jinsha River, to reveal its exhumation and kinematic history through low-temperature thermochronology. The ZHe ages (~17-13 Ma) of the samples from the hanging wall are much younger than the published ones in the footwall, but the AFT (~11-9 Ma) and AHe ages (~14-6 Ma) are only slightly younger than those in the footwall. The QTQt and 3-D thermo-kinematic Pecube modeling suggest consistently that the Xiongsong fault experienced strong activity during the mid-Miocene (~17-11 Ma) and then weakened. Post-11 Ma decreases in exhumation here on the trunk of the Jinsha river, if interpreted as river incision, is opposite to previously inferred river response to late Miocene surface uplift driven by the lower crust flow, implying the importance of local faulting in regional exhumation and perhaps the development of the Jinsha River. The late Miocene transition of faulting activity is found on other major faults in SE Tibet as well. We infer that the near synchronized change in regional fault activity may be caused by the clockwise rotation of the Chuan-Dian block, while its being extruded southeastward from the pushing front of the Indian collision. © 2023, The Authors. All rights reserved.

关键词： Rivers

来源：评论

学校读者我要写书评

暂无评论

Recent advances in bubble-based technologies: Underlying interaction mechanisms and applications

引用

APPLIED PHYSICS REVIEWS 2021年第1期8卷

作者： Qiao, Chenyu Yang, Diling Mao, Xiaohui Xie, Lei Gong, Lu Peng, xuwen Peng, Qiongyao Wang, Tao Zhang, Hao zeng, Hongbo Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G 1H9 Canada

Gas bubbles widely exist in nature and numerous industrial processes. The physicochemical characteristics of bubbles such as large specific surface area, low density, and hydrophobicity make them an ideal platform for developing colloidal and interfacial technologies. Over the past few decades, much effort has been devoted to investigating the properties and behaviors of bubbles and their applications. A series of bubble-based technologies (BBTs) have been developed, which have attracted increasing attention and shown great importance in a wide range of engineering, material, and biological fields. These BBTs, such as bubble flotation and the bubble-liposome system, provide feasible and promising solutions to mineral separation, material assembling, medical diagnosis, and drug delivery. In this work, we have systematically reviewed the physicochemical characteristics of bubbles and how to modulate their behaviors in complex fluid systems, as well as the underlying fundamental interaction mechanisms of bubbles in related BBTs. Advanced nanomechanical techniques such as atomic force microscopy, which are used to quantify the interaction mechanisms in bubble-containing systems, have been introduced. The effects of various influential factors on the bubble behaviors are discussed, which provide potential approaches to improve the controllability and performance of BBTs. The recent advances in the applications of selected BBTs in engineering, biomedical, and material areas are presented. Some remaining challenging issues and perspectives for future studies have also been discussed. This review improves the fundamental understanding of characteristics and surface interaction mechanisms of bubbles, with useful implications for developing advanced BBTs.

关键词： Diagnosis

来源：评论

学校读者我要写书评

暂无评论

A novel nano-thermite system with BiOF as fluorine-containing oxidant for enhanced energy release performance

引用

CHEMICAL ENGINEERING JOURNAL 2023年第1期468卷

作者： Li, Jingwei Liu, xuwen Huang, Qian Liu, Feifan Xie, Quanmin Hu, Maocong Su, Jiaxin Zhang, Chengchen zeng, Yuyang Zhu, Chenguang Nanjing Univ Sci & Technol Sch Chem & Chem Engn Nanjing 210094 Peoples R China Jianghan Univ State Key Lab Precis Blasting Wuhan 430113 Peoples R China Shaanxi Appl Phys Chem Res Inst Sci & Technol Appl Phys Chem Lab Xian 710061 Peoples R China

The reduced diffusion distance of nano-thermite results in an exceptionally high energy release rate and intense exothermic reactions upon ignition, which has drawn significant interest from researchers in the field of energetic materials. With the deepening of research, metal fluorides are gradually favored by researchers because of their unique reaction characteristics. This paper presents the synthesis of a new fluorine-containing oxidant, BiOF, and its use in the preparation of a novel nano-thermite with n-Al. BiOF crystals exhibit a unique microscopic morphology and are interlaced into "nanoflower" microspheres, which allows for good interfacial contact between the oxidant and fuel during the recombination process. The resulting n-Al/BiOF system displays excellent ignition and combustion performance, with a combustion temperature higher than the boiling point of its main combustion products, AlF3 and Bi. Compared with n-Al/CuO and n-Al/MoO3 systems, n-Al/BiOF exhibits a higher flame propagation rate under confinement. In addition, the ignition threshold of the n-Al/BiOF system is also smaller than that of the n-Al/CuO and n-Al/MoO3 systems. Furthermore, the paper examines the reaction mechanism of the n-Al/BiOF system through thermal reaction path analysis and combustion and thermal analysis product characterization. The paper discovers a "pre-ignition" reaction mechanism before the ignition temperature, where the strongly electronegative fluorine in BiOF corrodes the Al2O3 shell, promoting the release of aluminum energy. The synergistic and effective interaction between oxygen, fluorine, and fuel aluminum in the n-Al/BiOF system results in efficient energy release performance, making BiOF a promising candidate for n-Al based reactive materials in propellants, explosives, and pyrotechnic products.

关键词： Nano-thermites Nanostructured energetic materials Conformational relationships Fluorinated oxidizing agent Pre-ignition reaction

来源：评论

学校读者我要写书评

暂无评论

Using Intrinsic Intracrystalline Tunnels for Near-Infrared and Visible-Light Selective Electrochromic Modulation

引用

ADVANCED OPTICAL MATERIALS 2017年第11期5卷

作者： Wang, Zhen Zhang, Qingzhu Cong, Shan Chen, Zhigang Zhao, Jinxiong Yang, Mei Zheng, Zuhui zeng, Sha Yang, xuwen Geng, Fengxia Zhao, Zhigang Univ Sci & Technol China Sch Nanotechnol & Nanobion Hefei 230000 Peoples R China Chinese Acad Sci Suzhou Inst Nanotech & Nanobion Key Lab Nanodevices & Applicat Suzhou 215123 Peoples R China Soochow Univ Coll Chem Chem Engn & Mat Sci Suzhou 215123 Peoples R China

Dual-band electrochromic composite materials are of utmost importance in advancing the electrochromic field toward achieving the ideal smart window with independent control over visible and near-infrared (NIR) radiation. However, such composites usually need deliberate architecting of their mesoscale structure (e.g., via block copolymer-templating method) to make the electrolyte contact with both NIR and visible-light modulating components. Herein, instead of arduously making exterior pores, the intrinsic structural tunnels are utilized directly in electrochromic materials to facilitate the accommodation and transportation of insertion ions, which permit the infiltration of the electrolyte to be in contact with both visible (Prussian blue) and NIR-light modulating components (nonstoichiometric tungsten oxide). Such simple-fabricated composite materials exhibit excellent dual-band electrochromic performance with an unprecedented dynamic optical range for modulation of visible and NIR light, up to 71.2% at 633 nm and 64.8% at 1600 nm, respectively.

关键词： electrochromic modulation intracrystalline tunnels NIR and visible-light modulation

来源：评论

学校读者我要写书评

暂无评论

易肇事肇祸精神分裂症患者临床特征分析

引用

重庆医学 2013年第34期42卷 4123-4125页

作者：曾德志樊学文孙全新王磊刚湖北科技学院附属第二医院精神科湖北咸宁437100

目的探讨易肇事肇祸精神分裂症(SP)患者临床特征,为有效预防控制SP患者肇事肇祸提供科学依据。方法随机抽取该院精神科易肇事肇祸(研究组)和普通住院(对照组)SP患者各100例资料,进行回顾性调查分析,比较两组一般资料、病情资料和精神症... 详细信息

目的探讨易肇事肇祸精神分裂症(SP)患者临床特征,为有效预防控制SP患者肇事肇祸提供科学依据。方法随机抽取该院精神科易肇事肇祸(研究组)和普通住院(对照组)SP患者各100例资料,进行回顾性调查分析,比较两组一般资料、病情资料和精神症状等方面的差别。结果研究组中男性、20~39岁、无配偶、低学历、农村、农民、无医保、家庭经济和社会支持较差的患者比例较对照组高(P<0.05);研究组偏执型、合并躯体疾病的比例和阳性与阴性综合征量表(PANSS)阳性因子积分较对照组高,但PANSS阴性因子积分较对照组低、病程相对较短、住院次数相对较少(P<0.05);研究组幻觉、妄想等阳性症状出现比例较对照组高,但回避社交和情感迟钝等阴性症状出现比例较对照组低(P<0.05)。结论阳性精神症状是SP患者肇事肇祸动因,男性、青壮年、无配偶、低学历、农村、农民、偏执型SP患者更易肇事肇祸;社会支持和家庭经济状况较差、无医疗保险,会增加肇事肇祸概率。

关键词：精神分裂症因素分析统计学纵火行为

来源：评论

学校读者我要写书评

暂无评论

Cation defect engineering in LaCoO3 perovskite as the "Two birds one stone" strategy to enhanced Fenton-like reaction: Regulating Co spin state and optimizing electron transfer ability

引用

SEPARATION AND PURIFICATION TECHNOLOGY 2024年 337卷

作者： Fang, Zhimo Feng, xuwen Zhou, Zhou zeng, Zepeng Xia, Yuangu Li, Jihong Liu, Ji Hu, Bin Li, Kai Lu, Qiang North China Elect Power Univ Natl Engn Res Ctr New Energy Power Generat Beijing 102206 Peoples R China

The reactive oxygen species (ROS) triggered by peroxymonosulfate (PMS), primarily composed of radicals and nonradicals, can deeply and selectively remove pollutants in complex wastewater. However, the low efficiency of electron transfer and insufficient surface catalytic sites remain the main obstacles to the development of efficient and selective PMS activators. Herein, we constructed ABO(3) perovskite catalysts (LaCoO3) with adjustable La vacancies (V-La) densities through urea introduction. Experiment, characterization, and theoretical calculation jointly revealed that VLa could not only induce electron delocalization in Co site to enhance the Co 3d - O 2p covalency for accelerating ROS (sulfate radicals (SO4 center dot-), singlet oxygen (O-1(2)), and high valent cobalt (Co(IV) = O)) generation, but also trigger the transition of spin-polarization configuration to form Co3+ (t(2g)(5)e(g)(1)) with the intermediate spin state as new active sites for surface-bound PMS* complexes production. The nonradical-dominated and radical-assisted system containing multi-site achieved efficient PMS utilization (95.6 %), excellent decontamination activity (0.753 min(-1)), good mineralization ability (82.7 %), satisfactory acid-base resistance (working pH range 3-11), and environmental robustness for actual water treatment. This study reveals the role of cation vacancy engineering in achieving "Two birds one stone" for PMS activation at the atomic level, which will guide the rational design of Fenton-like catalysts.

关键词： Peroxymonosulfate La vacancies Spin state Delocalization Radicals and nonradicals

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：