检索结果-内蒙古大学图书馆

In-situ Environmental TEM Observations of Structural Evolution of Oxygenated Cu(110) in CO

Microscopy and Microanalysis 2022年第S1期28卷 186-188页

作者： Sun, Xianhu Wang, Jianyu Chen, Xiaobo Ye, Shuonan Liang, Zhilu Yang, Judith C Zhou, Guangwen Department of Mechanical Engineering & Materials Science and Engineering Program State University of New York at Binghamton Binghamton NY USA Department of Chemical and Petroleum Engineering University of Pittsburgh Pittsburgh PA USA

来源：评论

学校读者我要写书评

暂无评论

An application of conjugate gradient technique for determination of thermal conductivity as an inverse engineering problem 3

An application of conjugate gradient technique for determina...

引用

3rd International Conference on Advances in Mechanical engineering and Nanotechnology, ICAMEN 2021

作者： Pandey, Vivek Bekele, Addisu Ahmed, Gulam Mohammed Sayeed Jee Kanu, Nand Singh, Gyanendra Kumar Department of Thermal and Aerospace Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia Centre of Excellence for Advanced Manufacturing Engineering Program of Mechanical Design and Manufacturing Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia Department of Mechanical Engineering S. V. National Institute of Technology Surat India Department of Mechanical Design and Manufacturing Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia

Inverse problems frequently occur when boundary conditions/thermal properties of a material are unknown, and are determined from known internal temperature measurements. A direct problem is the opposite of an inverse problem. For example, it would be the task of determining the temperature field within a material body, given boundary conditions and thermal properties. In an ill-posed, inverse problem, small variations in internal temperature measurement cause large variations in the estimated quantity such as boundary heat flux. Measured temperature variations may be due to noise, measurement error and instrumentation error, among other factors. There are various methods for solving inverse problems in materials engineering. In the paper, an inverse problem of estimating boundary heat flux for one-dimensional heat conduction is solved using the classical method of Beck and temperature dependent thermal conductivity is estimated using the more recent and advanced Conjugate Gradient method (CGM). The temperature values from the finite difference application to a direct heat transfer problem are used along with noise added to the data, in order to simulate real world, experimental conditions. The data is applied to the inverse problem of finding boundary heat flux and thermal conductivity. It is seen that Conjugate Gradient Method (CGM) along with sequential function specification method recovers the boundary heat flux and thermal conductivity quite accurately for noise levels of 1% and 2%. It is further observed that addition of future time steps stabilize the algorithm and increase accuracy of the desired results. It is also observed that CGM can recover the temperature dependent thermal conductivity quickly within few iterations, for different values of thermal conductivity function coefficients, k0and k1. CGM is found to be fast and robust when applied to one-dimensional case and can be extended to complex geometries. © 2021 Elsevier Ltd.

关键词： Inverse problems

来源：评论

学校读者我要写书评

暂无评论

The Indoor People Tracking and Counting System

The Indoor People Tracking and Counting System

引用

International Automatic Control Conference

作者： Hao-Pu Lin Chin-Chuan Han Jun-Wei Liao Chong-Han Ciou Yi-Cheng Hong Ming-Lun Tan Ph. D. Program in Material and Chemical Engineering National United University MiaoLi Taiwan Department of Computer Science and Information Engineering National United University MiaoLi Taiwan

COVID-19 outbreaks and becomes serious from 2019 winter. Taking body temperature, wearing masks, recording footprint and avoiding crowds become important tasks and require a lot of manpower support for the prevention of the epidemic in every. In this study, we have integrated the infrared thermometer devices to measure people temperature and the people identities through RGB images at the entrance of buildings. Using the computer vision and deep learning methods, we would like to build a 24/7 and region-wide coverage assistance system to automatically record the footprint of a specific people in the building. We also detect if people taking off their masks in the yard at any time. The processing videos are grabbed from the existing CCTV systems. The developed system also locates the crowd and calculate the number of people in a specified area, and the manager can know the number of people and control the access in real time. It will reduce the burden of manpower. In addition, we have optimized the system performance to handle multiple camera videos and to reduce the hardware cost at the same time.

关键词：

来源：评论

学校读者我要写书评

暂无评论

chemical precipitation of nanocrystalline hydroxyapatite with calcium carbonate derived from green mussel shell wastes and several phosphorus sources

引用

Case Studies in chemical and Environmental engineering 2025年 11卷

作者： Naubnome, V. Prihanto, A. Schmahl, W.W. Pusparizkita, Y.M. Ismail, R. Jamari, J. Bayuseno, A.P. Department of Mechanical Engineering Diponegoro University Tembalang Semarang Indonesia Chemical Engineering Vocational Program Catholic Polytechnic Mangun Wijaya Semarang Indonesia Department of Earth and Environmental Science Ludwig Maximillian University of Munich Germany Department of Environmental Engineering Diponegoro University Semarang Indonesia

This work reports on a chemical precipitation experiment to produce nanocrystalline calcium hydroxyapatite (Ca-HA) using a calcium carbonate precursor derived from green mussel shells. Ammonium biphosphate and phosphoric acid were mixed with the precursor, achieving a pH of 13–14 by stirring magnetically at 30 °C for 48 hours. The nanocrystalline Ca-HA product (8–13 nm) was validated through X-ray diffraction and Fourier-transform infrared spectroscopy with an average calcium-to-phosphorus ratio molar of 1.8, influencing the thermal stability according to thermogravimetric and differential thermal analysis. Green mussel shell wastes are a recyclable calcium resource potentially used to synthesize nanocrystalline hydroxyapatite. © 2025 The Authors

关键词： Calcium carbonate chemical precipitation Green mussel shell waste Nanocrystalline hydroxyapatite Thermal stability

来源：评论

学校读者我要写书评

暂无评论

Nutritional and Functional Potentials of Wheat, Cowpea, and Yam Composite Flours on Bread Formulations: Effect of Blending Ratio and Baking Parameters

SSRN

引用

SSRN 2024年

作者： Tsegay, Negasi Admassu, Habtamu Tizazu, Belachew Zegale Gosu, Amsalu Department of chemical Engineering Addis Ababa Science and Technology University Addis Ababa Ethiopia Biotechnology and bioprocess center of excellence Addis Ababa Science and Technology University Addis Ababa Ethiopia Food process Engineering program Addis Ababa Science and Technology University Addis Ababa Ethiopia

Bread, a staple food, primarily utilizes wheat as the main ingredient due to its high carbohydrate content, despite being considered nutritionally deficient. To address this limitation, this research explored the use of composite flours in combination with affordable legumes and root tubers. Additionally, composite flours offer economic advantages by reducing wheat imports and promoting local utilization of crops that are underutilized. In the present study, bread wheat flour was substituted with cowpea and yam flours. The raw materials were processed into flour, and the proximate composition, functional properties, and anti-nutritional contents of the individual and blend flours (B1= 85% bread wheat + 5% cowpea + 10% yam, B2= 70% bread wheat + 10% cowpea + 20% yam, and B3= 55% bread wheat + 15% cowpea + 30% yam) were analyzed. The main findings revealed that the incorporation of cowpea and yam flours led to significant increases (p © 2024, The Authors. All rights reserved.

关键词： Swelling

来源：评论

学校读者我要写书评

暂无评论

A Novel Fluorescent Probe for ATP Detection Based on Synergetic Effect of Aggregation-induced Emission and Counterion Displacement

引用

chemical Research in Chinese Universities 2021年第1期37卷 166-170页

作者： PAN Quan MA Feiyan PU Xinqing ZHAO Manyi WU Qiling ZHAO Na YANG Jun TANG Ben Zhong Key Laboratory of Macromolecular Science of Shaanxi Province School of Chemistry&Chemical EngineeringShaanxi Normal UniversityXi’an710119P.R.China Department of Chemistry The Hong Kong University of Science&Technology(HKUST)Clear Water BayKowloonHong KongP.R.China

In this work,a fluorescent probe(TPEBe-I)was developed for adenosine triphosphate(ATP)detection based on the synergetic effect of aggregation-induced emission and counterion ***-I gave weak emission in aqueous solution due to the heavy-atom effect of counter iodide ***,upon the addition of ATP,the new aggregate complex(TPEBe-ATP)was formed between the cationic unit of TPEBe-I and ATP through electrostatic interactions,which not only restricted the intramolecular motion of luminogen but also eliminated the quenching effect of iodide *** a result,the fluorescent light-up detection for ATP was successfully ***,TPEBe-I exhibited high selectivity towards ATP and showed a wide linear detection region towards the logarithm of ATP concentration(5—600µmol/L)with a detection limit of 1.0µmol/L,enabling TPEBe-I as a promising probe for ATP quantitative analysis.

关键词： Fluorescent probe Adenosine triphosphate Aggregation-induced emission Counterion displacement

来源：评论

学校读者我要写书评

暂无评论

Destroying perfluorooctanoic acid in water by continuous liquid-phase plasma discharge

Destroying perfluorooctanoic acid in water by continuous liq...

引用

2023 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2023

作者： Rivera, Celiannie Nasir, Alia Aka, Robinson Junior Ndeddy Deng, Shaobo Wu, Sarah Environmental Science Program University of Idaho MoscowID83844 United States Department of Chemical and Biological Engineering University of Idaho MoscowID83844 United States Southern Research and Outreach Center University of Minnesota 35838120th ST WasecaMN56093 United States

ISBN: (纸本)9781713885887

Water pollution by per- and poly-fluorinated alkyl substances (PFAS) has become a major concern that needs to be dealt with immediately. In this study, a novel, continuous-flow, liquid-phase plasma discharge reactor (CLPD) was evaluated for its effectiveness and efficiency in removing PFOA in water. Argon was used as the carrier gas to evaluate other operating parameters including gas flow rate, water flow rate, water conductivity, and power applied using a two-level partial factorial design. The results showed that gas flow rate was the most significant factor among the four factors affecting the removal efficiency of PFOA by CLPD (p = 0.0029). The best combination of the four operating parameters was obtained (conductivity = 300 µs/cm, water flow rate = 150 mL/min, gas flow rate = 1.5 sL/min, and power = 100 W), under which the CFLPPD could achieve a PFOA removal rate of 93.4%. The breakdown pathway was estimated to be from PFOA to PFHPA, to PFHXA, to PFHeA, to PFBA, and then to H2O, CO2, F, and short-chain organics. © 2023 ASABE Annual International Meeting. All Rights Reserved.

关键词： Water pollution

来源：评论

学校读者我要写书评

暂无评论

Microwave-assisted hydrothermal synthesis of carbonated apatite with calcium and phosphate resources derived from green mussel shell and bovine bone wastes

引用

Environmental Advances 2024年 17卷

作者： Muryanto, Stefanus Prihanto, Antonius Pusparizkita, Yustina M. Ismail, Rifky Jamari, J. Bayuseno, Athanasius P. Show, Pau Loke Department of Mechanical Engineering Diponegoro University Semarang Indonesia Department of Mechanical Engineering Universitas Negeri Surabaya Indonesia Department of Chemical Engineering UNTAG University in Semarang Indonesia Vocational Chemical Engineering Program Catholic Polytechnic Mangunwijaya Semarang Indonesia Department of Environmental Engineering Diponegoro University Semarang Indonesia Department of Chemical Engineering Khalifa University Abu Dhabi United Arab Emirates Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection Wenzhou University Wenzhou China Department of Chemical and Environmental Engineering Faculty of Science and Engineering University of Nottingham Malaysia Semenyih Malaysia Department of Sustainable Engineering Saveetha School of Engineering SIMATS Chennai India

Resources recovery of calcium and phosphates from respective green mussel shells and bovine bones by calcination and chemically extracting are viable precursors for carbonate-rich apatite biomedical material applications. Because of their high osteoconductivity, carbonate-rich apatite bioceramics are being studied intensively for synthetic bone transplants. In the study, powder processing routes of calcination and following chemical dissolution in MgCl₂ and H₂SO₄ were each for recovering calcium of mussel shells and phosphate of bovine bones yielding a crystal-forming solution feedstock for use in microwave-irradiated synthesis. FTIR spectra and XRD patterns validated the crystallinity and phase identification for as-synthesized powders. As a result, the presence of CO₃, PO₄^3-, and OH- bands in carbonate-calcium phosphate complexes were present in FTIR spectra. According to the XRD Rietveld method, the as-synthesized powder product contained brushite, carbonated hydroxyapatite (CHA), calcite, and gypsum. The recoverable CHA crystallites' size was 40 nm. This present study demonstrated that microwave irradiation synthesis of CHA powder with calcium and phosphates derived from mussel shells and bovine bones is the potential to yield a large amount of CHA for bioceramics and would aid in the design of a powder processing step for preparing the CHA powder precursor in biomedical applications. © 2024

关键词： Calcination Carbonate-rich apatite chemical dissolution Hydroxyapatite Microwave-irradiated synthesis

来源：评论

学校读者我要写书评

暂无评论

Advances in liposomal nanotechnology: from concept to clinics

RSC Pharmaceutics

引用

RSC Pharmaceutics 2024年第5期1卷 928-948页

作者： Reem M. Senjab Nour AlSawaftah Waad H. Abuwatfa Ghaleb A. Husseini Biomedical Engineering Program College of Engineering American University of Sharjah Sharjah P.O. Box 26666 United Arab Emirates ghusseini@aus.edu Materials Science and Engineering Ph.D. Program College of Arts and Sciences American University of Sharjah Sharjah P.O. Box 26666 United Arab Emirates Department of Chemical and Biological Engineering College of Engineering American University of Sharjah Sharjah P.O. Box 26666 United Arab Emirates Biosciences and Bioengineering PhD Program College of Engineering American University of Sharjah Sharjah P.O. Box 26666 United Arab Emirates

Liposomes, spherical phospholipid vesicles with a unique morphology mimicking that of body cells, have emerged as versatile nanoparticles for drug delivery. Their biocompatibility, low cytotoxicity, targeted delivery, and hydrophobic and hydrophilic characteristics make them stand out over traditional drug delivery systems. Liposomes can be tailored in size, composition, lamellarity, and surface charge, offering a unique level of customization for various applications. Extensive research in liposome technology has led to the development of a wide range of liposomal formulations with enhanced functionalities, such as PEGylated liposomes, ligand-targeted liposomes, and stimuli-responsive liposomes. Beyond their crucial role in cancer treatment, liposomes play a significant role in influenza, COVID-19, cancer, and hepatitis A vaccines. They are also utilized in pain management, fungal treatment, brain targeting, and topical and ocular drug delivery. This review offers insight into the types of liposomes, their composition, preparation methods, characterization methods, and clinical applications. Additionally, it discusses challenges and highlights potential future directions in liposome-based drug delivery.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Investigation of Microplastics in Raw and Processed Water for Unbranded Refilled Drinking Water in Karawang, Indonesia

SSRN

引用

SSRN 2025年

作者： Sari, Gina Lova Utami, Marsah Rahmawati Kasasiah, Ahsanal Rohmana, Andini Siti Amethysia, Nur Ridha Cahyaningrum, Putri Sekti Nainggolan, Adinda Melianda Kurniawan, Setyo Budi Study Program of Environmental Engineering Faculty of Engineering Universitas Singaperbangsa Karawang H.S Ronggowaluyo Karawang41361 Indonesia Study Program of Pharmacy Faculty of Health Science Universitas Singaperbangsa Karawang H.S Ronggowaluyo Karawang41361 Indonesia Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Selangor UKM Bangi 43600 Malaysia

It is undeniable that microplastics are found in many types of water, including drinking water. This study aims to investigate the presence of microplastics in one of the drinking waters widely used by communities in Indonesia, known as unbranded refilled drinking water. The investigation was conducted at eight unbranded refilled drinking water depots in Karawang, West Java. A total of 2.00 L of raw air and processed water samples were taken from each depot, then prepared by the National Oceanic and Atmospheric Administration, analyzed using an Olympus BX - 41 microscope with a magnification of ten times, and then counted manually. The results showed that raw and processed water in all unbranded refilled drinking water depots contained microplastics with details of 15.50-42.00 particles/L and 6.50-17.50 particles/L, respectively. The dominant microplastics found were fibers and fragments with sizes of 1.00-3.00 mm and less than 1.00 mm. Furthermore, the dominant color of the microplastics was black, indicating that the polymers of microplastics were polyethylene, polypropylene, or polystyrene. This finding has confirmed that refilled drinking water consumed by the community in Indonesia has potentially become one of the main pathways for the entry and accumulation of microplastics into the human body, posing significant health risks. Based on current research, further research is needed to improve water treatment performance to protect public health. © 2025, The Authors. All rights reserved.

关键词： Microplastic

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：