检索结果-内蒙古大学图书馆

engineering Nanocomposite Metal-Phenolic Network Membranes with Hollow Mofs Via In-Situ Etching for High-Efficiency Organic Solvent Nanofiltration

SSRN

引用

SSRN 2022年

作者： Lv, Yan Chen, Yizhou Bai, Yuting Meng, Lijun Zhang, Wenting Xia, Jingjing Xu, Zhiming Sun, Rui Liu, Tianxi State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Innovation Center for Textile Science and Technology College of Materials Science and Engineering Donghua University 2999 North Renmin Road Shanghai201620 China Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University Wuxi214122 China State Key Laboratory of Pollution Control and Resource Reuse Shanghai Institute of Pollution Control and Ecological Security School of Environmental Science and Engineering Tongji University Shanghai200092 China

Organic solvent nanofiltration (OSN), as an emerging membrane separation technology, holds great potential in pharmaceutical and chemical applications. However, the development of such a promising technology is severely retarded by the trade-off between permeability and selectivity. Herein, we report a novel thin-film nanocomposite (TFN) membrane by incorporating hollow metal-organic frameworks (MOFs) into the metal-phenolic network (MPN) selective layer for highly efficient OSN. This nanocomposite selective layer is fabricated via an aqueous deposition of tannic acid (TA) and FeII ions with MOFs, during which the MOFs are in-situ etched to a hollow structure. Attributed to the extra transfer channels provided by hollow MOFs, the methanol permeance of the TFN membranes increases to 24.7 L·m-2·h-1·bar-1, exhibiting an outstanding improvement of 270% compared with the membranes without MOFs (9.1 L·m-2·h-1·bar-1). Meanwhile, the coordination interaction between TA and metal centers in MOFs endows excellent interfacial compatibility between MPN matrix and MOF fillers, guaranteeing a defect-free selective layer and thus high rejection for small organic molecules (> 99% for Alcian blue). Furthermore, various MOFs, including ZIF-67, prussian blue (PB), and MIL-53(Al), are also employed to fabricate MPN/MOF nanocomposite membranes, proving the availability and universality of this facial aqueous deposition strategy. Additionally, we take deep insight into the mechanism of in-situ etching process via density functional theory (DFT) calculations to pave the way for the fabrication of TFN membranes with hollow nanofillers. This work provides a sufficient strategy for the design and construction of novel highly efficient OSN nanocomposite membranes with excellent permeability and retention performance. © 2022, The Authors. All rights reserved.

关键词： Nanofiltration

来源：评论

学校读者我要写书评

暂无评论

Climate and soil pH modulate global negative effects of nitrogen enrichment on soil nematodes

引用

Soil Biology and Biochemistry 2025年 208卷

作者： Weibo Kong Nico Eisenhauer Josep Peñuelas Liping Qiu Xiaomei Gou Yu Song Jintao Jiao Xiaoxu Jia Xiang Wang Mingan Shao Gehong Wei Xiaorong Wei State Key Laboratory of Soil and Water Conservation and Desertification Control Northwest A&F University Yangling China College of Soil and Water Conservation Science and Engineering Northwest A&F University Yangling China Institute of Soil and Water Conservation Ministry of Water Resources and Chinese Academy of Sciences Yangling China German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig Deutscher Platz 5e 04103 Leipzig Germany Institute of Biology Leipzig University Deutscher Platz 5e 04103 Leipzig Germany CSIC Global Ecology Unit CREAF-CSIC-UAB Bellaterra Catalonia Spain CREAF Cerdanyola del vallès Barcelona Catalonia Spain Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China College of Land Science and Technology China Agricultural University Beijing China

Soil nematodes account for ∼80 % of all Metazoans and play key roles in supporting terrestrial ecosystem functions, yet their responses to pervasive nitrogen (N) deposition, a significant global change factor, and their potential context-dependencies remain unclear. In this study, we conducted a global meta-analysis of 629 paired observations from 91 studies to examine how climatic and pedological factors modulate the effects of N enrichment on soil nematodes, and to assess the spatial patterns of these N-induced effects. We found that N enrichment significantly decreased soil nematode diversity (−3.2 %), maturity index (−6.1 %), structure index (−12.3 %), and the abundance of omnivorous-predatory nematodes (−28.3 %), but had minimal effect on the nematode enrichment index and the abundance of total and other trophic groups of nematodes. The negative effects of N on soil nematodes were greater in grasslands than in forests and croplands, and the effects of NH 4 NO 3 were greater than those of urea. Pedological factors (soil pH and ammonium), climate (mean annual temperature and aridity index), and N enrichment regimes (rates and types of N enrichment) were dominant modulators of N effects. With increasing rate of N enrichment, the effects of N on most soil nematode parameters shifted from negative in dry and cold climates to positive in wet and warm climates, and from positive to negative with increasing background soil pH. Our spatial prediction identified East Asia, South Asia, and Europe as critical regions where soil nematodes are most negatively affected by current N deposition. These findings suggest that N enrichment has global negative effects on soil nematode communities and food web complexity by soil acidification and NH 4 + accumulation, which may trigger cascading effects on the entire ecosystem.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Operating performance assessment for industrial process with hybrid qualitative and quantitative information using modified fuzzy probabilistic rough set

Operating performance assessment for industrial process with...

引用

Chinese Automation Congress (CAC)

作者： Xiaoyu Zou Fuli Wang Yuqing Chang Jie Pan School of Mechatronic Engineering China University of Mining and Technology Xuzhou China State Key Laboratory of Process Automation in Mining & Metallurgy Beijing China College of Information Science & Engineering Northeastern University Shenyang China School of Information and Control Engineering Xuzhou China

ISBN: (数字)9781728176871

ISBN: (纸本)9781728176888

Since satisfactory operating performance helps guarantee high comprehensive economic benefit under normal working condition for industrial processes, it is crucial to conduct accurate performance assessment on the degree of optimality for modern industry. Process online assessment judges how well the process is working. However, the coexistence of the qualitative and quantitative information renders the conventional performance assessment approaches inappropriate. To solve the above problem, a modified version of fuzzy probabilistic rough set (FPRS) is proposed for performance assessment in this research. The modified FPRS is employed to establish a valid online assessment strategy of operating performance for complicated industrial processes with the coexistence of both the qualitative and quantitative information. The proposed technique is finally validated by a gold hydrometallurgy process.

关键词： Rough sets Probabilistic logic Uncertainty Production Process control Indexes Gold

来源：评论

学校读者我要写书评

暂无评论

Effect of Double Pressure Relief Coefficient on Vertical Fracture Coal Sample Failure and Multi-Scale Structure

SSRN

引用

SSRN 2024年

作者： Wang, Zhonghua Guo, Zhongping Sun, Dongling College of Energy and Mining Engineering Shandong University of Science and Technology Qingdao266590 China China Coal Technology Engineering Group Chongqing Research Institute Chongqing400037 China State Key Laboratory of Coal Mine Disaster Prevention and Control Chongqing400037 China

It is still a worldwide problem on the prevention and control of deep outburst disaster dominated by stress. So it is of great significance to study the structural characteristics of deep coal seam after hydraulic fracturing, gas extraction and coal roadway driving. In this paper, it studied the effects of different double pressure relief coefficients on vertical fracture coal sample failure and multi-scale structure characteristics. Firstly, it carried out mechanical seepage experiments of coal samples with different double pressure relief coefficients (β=0.5, 1.0, 1.5). And then it studied the macro-micro fracture structure and micro-pore structure of coal samples before and after vertical fracture test. Finally, it revealed the macro-micro mechanism of double pressure relief and permeability improvement of coal seam stress and gas, efficient extraction and effective outburst prevention. The results show that the development of macro-fracture and micro-fracture in vertical fractured coal body gradually weakens with the increase of double pressure relief coefficient β, and the cracks change from tension failure to split failure. Macro-fracture play a more dominant role than micro-fracture. When β is 1.0 (σ=P), macro-fracture is most developed. The micro-fracture increased after double pressure relief compared with before the test. When β is 0.5 (σ=0.5P), the micro-fracture is the most developed. After the test, the pore diameter was larger than before the test, and the volume proportion of the cumulative pore diameter increased gradually and the growth rate was similar. Before and after the test, the proportion of micropores and tiny pores was the largest, the proportion of macropores was the second, and the proportion of mesopores was the smallest. It provides reference value for the prevention and control of deep coal and gas outburs t dominated by stress. © 2024, The Authors. All rights reserved.

关键词： Pore structure

来源：评论

学校读者我要写书评

暂无评论

Is Monochloramine a Better Alternative Pre-Oxidant for Enhancing Algal Removal by Conventional Drinking Water Treatment Process?

SSRN

引用

SSRN 2023年

作者： Liu, Han Lv, Huanyu Xu, Hangzhou Zhang, Jian Rao, Dandan Sun, Bo Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science & Engineering Shandong University Shandong Qingdao266237 China Tongji University China College of Safety and Environmental Engineering Shandong University of Science and Technology Shandong Qingdao266590 China

Algal blooms worldwide pose many challenges to drinking water production and pre-oxidation with NaClO, KMnO4 or ozone is commonly used to enhance algal removal by the conventional drinking water treatment process. However, these currently employed oxidation processes often result in significant algal cell lysis or impede the operation of the subsequent units. Higher algal removal with pre-chlorination process in real water compared to that in synthetic water was accidentally observed. The preliminary results indicated ammonium in real water altered the chlorine species to NH2Cl which was responsible for the improved treatment efficiency, which resulted in this study. 1.5～3.0 mg/L of NH2Cl with oxidation time of 3～7 h significantly enhanced algal removal by coagulation. Selective oxidation of surface-adsorbed organic matters (S-AOM) by NH2Cl and peeling them off from the algal surface increased the zeta potential from −20.2 mV to −3.8 mV while promisingly maintaining cell integrity is the primary mechanism of enhancing algal removal by coagulation. The peeled S-AOM kept a large molecular weight and acted as polymer aids. In addition, most of the added coagulant (Al3+) was utilized to reduce the repulsive electrostatic forces between the algal cells rather than complexed by the DOM and S-AOM. Compared to NaClO and KMnO4, NH2Cl showed the best performance in improving algal removal, avoiding cell lysis and decreasing DBPs formation potential. These venerable virtues suggested that pre-oxidation with NH2Cl is a preferable process for algal-laden water treatment, especially in long-distance water delivery. © 2023, The Authors. All rights reserved.

关键词： Chlorine compounds

来源：评论

学校读者我要写书评

暂无评论

Towards Personalized Privacy-Preserving Incentive for Truth Discovery in Crowdsourced Binary-Choice Question Answering

Towards Personalized Privacy-Preserving Incentive for Truth ...

引用

IEEE Annual Joint Conference: INFOCOM, IEEE Computer and Communications Societies

作者： Peng Sun Zhibo Wang Yunhe Feng Liantao Wu Yanjun Li Hairong Qi Zhi Wang State Key Laboratory of Industrial Control Technology Zhejiang University P. R. China School of Cyber Science and Engineering Wuhan University P. R. China Department of Electrical Engineering and Computer Science University of Tennessee Knoxville USA School of Computer Science and Technology Zhejiang University of Technology P. R. China

ISBN: (数字)9781728164120

ISBN: (纸本)9781728164137

Truth discovery is an effective tool to unearth truthful answers in crowdsourced question answering systems. Incentive mechanisms are necessary in such systems to stimulate worker participation. However, most of existing incentive mechanisms only consider compensating workers' resource cost, while the cost incurred by potential privacy leakage has been rarely incorporated. More importantly, to the best of our knowledge, how to provide personalized payments for workers with different privacy demands remains uninvestigated thus far. In this paper, we propose a contract-based personalized privacy-preserving incentive mechanism for truth discovery in crowdsourced question answering systems, named PINTION, which provides personalized payments for workers with different privacy demands as a compensation for privacy cost, while ensuring accurate truth discovery. The basic idea is that each worker chooses to sign a contract with the platform, which specifies a privacy-preserving level (PPL) and a payment, and then submits perturbed answers with that PPL in return for that payment. Specifically, we respectively design a set of optimal contracts under both complete and incomplete information models, which could maximize the truth discovery accuracy, while satisfying the budget feasibility, individual rationality and incentive compatibility properties. Experiments on both synthetic and real-world datasets validate the feasibility and effectiveness of PINTION.

关键词： Privacy Knowledge discovery Crowdsourcing Contracts Task analysis Drugs

来源：评论

学校读者我要写书评

暂无评论

Promoting Effects of Iron Ions on Microcystis Aeruginosa Growth and Arsenate Accumulation and Reduction at Different Phosphorus Sources

SSRN

引用

SSRN 2024年

作者： Wang, Zhenhong Zeng, Lingjun Luo, Zhuanxi Wang, Yan Hao, Chunming College of Chemistry Chemical Engineering and Environment Minnan Normal University Key Laboratory of Modern Separation and Analysis Science and Technology Key Laboratory of Pollution Monitoring and Control Zhangzhou363000 China College of Chemical Engineering Huaqiao University Xiamen361021 China School of Mathematics and Statistics Minnan Normal University Zhangzhou363000 China North China Institute of Science and Technology Hebei Sanhe065201 China

Effects of different dissolved organic phosphorus (DOP) associated with iron sources on algal growth and arsenate (As(V)) metabolism were evaluated and compared systematically in Microcystis aeruginosa. Results showed that the difference in phosphorus sources including two forms DOP of D-glucose-6-phosphate (GP) and phytic acid (PA)) and even the control of dissolved inorganic phosphorus (DIP) had more significant effects on As(V) metabolism than that of iron sources, including iron deficient, iron ion (Fe3+), and colloidal iron. Meanwhile, the release of microcystins in media was significantly more affected by the different phosphorus sources than iron. Furthermore, DOP facilitated arsenic (As) biotransformation, especially for the methylated As efflux from a single algal cell, while in DIP, As(V) accumulation was as the primary metabolic way in algae. The total As metabolism amount per algal cell under PA was five times that of DIP and GP. From the observed metabolites in algae from 1H-NMR spectra and three-dimensional fluorescence analysis (3D-EEM), the impact of iron sources on the production of algal metabolites was substantial, especially at Fe3+ conditions, which notably enhanced the synthesis of organic compounds in algae. Accordingly, iron ions could inhibit As accumulation under DIP but promote it under DOP. The obtained results can better understand the combined role of different phosphorus and iron sources in algal bloom outbreaks and As(V) metabolism. © 2024, The Authors. All rights reserved.

关键词： Iron

来源：评论

学校读者我要写书评

暂无评论

Characterization of the complete chloroplast genome of theCamellia nitidissima, an endangered and medicinally important tree species endemic to Southwest China

引用

Mitochondrial DNA Part B 2018年第2期3卷 884-885页

作者： Meng-Meng Liu Ze-Peng Cao Jun Zhang Da-Wei Zhang Xiao-Wei Huo Gang Zhang College of Traditional Chinese Medicine Hebei University Baoding ChinaInstitute of Bioinformatics and Medical Engineering School of Electrical and Information Engineering Jiangsu University of Technology Changzhou China College of Pharmaceutical Science Key Laboratory of Pharmaceutical Quality Control of Hebei Province College of Pharmaceutical Science Hebei University Baoding China Institute of Bioinformatics and Medical Engineering School of Electrical and Information Engineering Jiangsu University of Technology Changzhou China College of Pharmacy and Shaanxi Provincial Key Laboratory for Chinese Medicine Basis & New Drugs Research Shaanxi University of Chinese Medicine Xi’an China

TheCamellia nitidissimais an endangered tree species native to Southwest China with high economic and medicinal values. Genetic information ofC. nitidissimawould provide good knowledge for the conservation of this wild resource. In this article, we characterized the complete chloroplast genome ofC. nitidissimausing Illumina sequencing technology. The size of circular genome is 157,247 bp, containing a large single copy (LSC) region of 86,880 bp and a small single copy (SSC) region of 18,258 bp. The LSC region and SSC region are separated by a pair of inverted repeat regions (IRa and IRb), each of 26,068 bp. In total, 136 genes are encoded in this cp genome, including 89 protein-coding genes (81 species), 39 tRNA genes (30 species), and 8 rRNA genes (4 species). The overall G + C content of the chloroplast genome is 37.3%. The phylogenetic analysis suggests thatC. nitidissimais closely related toC. petelotti.

关键词： Camellia nitidissima chloroplast genome high-throughput sequencing endangered species

来源：评论

学校读者我要写书评

暂无评论

Optimization of process parameters and kinetics of adsorption treatment of thallium-containing wastewater

Optimization of process parameters and kinetics of adsorptio...

引用

第四届能源与环境研究进展国际学术会议（ICAEER 2019）

作者： Tao Wen Yuanyuan Zhao Youze Xu Jing Guo Guangyi Fu Yingxiang Cheng Yu Zhong College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources Central South University Key Laboratory of Water Pollution Control Technology Hunan Research Academy of Environmental Science Hunan Dongting Lake Ecological Environment Observation Center

Thallium is an extremely toxic metal and abundant in industrial wastewater but little studied. In order to understand the optimal adsorption kinetic parameters of the chelating resin containing hydrazine wastewater, we carried out adsorption experiments on the cerium-containing wastewater treated by chemical precipitation. In this chapter, the optimum adsorption conditions, adsorption model, dynamic adsorption curve and desorption and regeneration of adsorbent were determined at different pH, temperature, adsorption time and different adsorbent dosage. The results show that the removal rate of thallium wastewater by resin is up to 97.5% when the pH value is 9. The optimum adsorption temperature is 30 and the adsorption reached equilibrium at 80 min. The adsorption process is consistent with Lagergren quasi-second-order adsorption and Langmuir isotherm model. The regenerative properties of the resin show that the resin adsorption rates still reach 95.8% after repeat use for six times. In summary, the chelating resin has good adsorption and reusability to the thallium-containing wastewater

关键词： Optimization of process parameters and kinetics of adsorption treatment of thallium-containing wastewater

来源：评论

学校读者我要写书评

暂无评论

An Infinite-Dimensional Luenberger-like Observer for Water Waves

An Infinite-Dimensional Luenberger-like Observer for Water W...

引用

第37届中国控制会议

作者： Yang YU Hai-Long PEI Cheng-Zhong XU Key Laboratory of Autonomous Systems and Networked Control Ministry of EducationUnmanned Aerial Vehicle Systems Engineering Technology Research Center of GuangdongCollege of Automation Science and EngineeringSouth China University of Technology LAGEP Batiment CPEUniversity Claude Bernard-Lyon 1

The paper deals with the observation problem by using an infinite dimensional observer for the water wave system governed by linearized water wave partial differential *** consider that the water wave system evolves in some infinitedimensional Hilbert *** output measurement of dynamical system is supposed to be the water wave surface *** infinite-dimensional exponentially convergent Luenberger-like observer is proposed to estimate the states of water water system:water velocity potential and surface *** simulations by the finite difference scheme are carried out to validate the proposed observer.

关键词： infinite dimension system observer convergence finite difference method

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：