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Journal of Systems Engineering and Electronics 2024年第4期35卷 906-921页

作者： han yingchao MENG Weixiao FAN Wentao School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin 150001China China Mobile(Suzhou)Software Technology Company Limited Suzhou 215000China

With the continuous development of network func-tions virtualization(NFV)and software-defined networking(SDN)technologies and the explosive growth of network traffic,the requirement for computing resources in the network has risen *** to the high cost of edge computing resources,coordinating the cloud and edge computing resources to improve the utilization efficiency of edge computing resources is still a considerable *** this paper,we focus on optimiz-ing the placement of network services in cloud-edge environ-ments to maximize the *** is first proved that,in cloud-edge environments,placing one service function chain(SFC)integrally in the cloud or at the edge can improve the utilization efficiency of edge *** a virtual network function(VNF)performance-resource(P-R)function is proposed to repre-sent the relationship between the VNF instance computing per-formance and the allocated computing *** select the SFCs that are most suitable to deploy at the edge,a VNF place-ment and resource allocation model is built to configure each VNF with its particular P-R ***,a heuristic recur-sive algorithm is designed called the recursive algorithm for max edge throughput(RMET)to solve the *** simula-tions on two scenarios,it is verified that RMET can improve the utilization efficiency of edge computing resources.

关键词： cloud-edge environment virtual network function(VNF)performance-resource(P-R)function edge resource allo-cation

锰掺杂纳米羟基磷灰石的体外抗菌–促成骨性能研究

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无机材料学报 2024年第3期39卷 313-320页

作者：李承瑜丁自友韩颖超武汉理工大学材料复合新技术国家重点实验室武汉430070

羟基磷灰石(HAP)作为一种常见的骨修复材料,在治疗感染性骨缺损时仍面临着细菌感染的风险,有限的骨诱导能力也阻碍了其进一步应用。本研究采用共沉淀法制备了一种锰掺杂羟基磷灰石纳米棒(MnHAP),该纳米材料兼具优良的细胞生物相容性,高... 详细信息

羟基磷灰石(HAP)作为一种常见的骨修复材料,在治疗感染性骨缺损时仍面临着细菌感染的风险,有限的骨诱导能力也阻碍了其进一步应用。本研究采用共沉淀法制备了一种锰掺杂羟基磷灰石纳米棒(MnHAP),该纳米材料兼具优良的细胞生物相容性,高抗菌效率和骨诱导能力。抗菌实验表明,MnHAP10(n(Mn)/n(Ca+Mn)=10%)对大肠杆菌和金黄色葡萄球菌的抑制率可分别达到77.85%和75.92%,并且在808 nm近红外光照射下,对大肠杆菌的抗菌效率得到了进一步增强(97.63%)。细胞增殖以及相关成骨基因实验表明,MnHAP有利于成骨细胞的增殖分化,提高了对蛋白质的吸附能力和成骨活性,促进了相关成骨基因的表达,且具有良好的生物相容性。MnHAP纳米棒有望为感染性骨缺损治疗提供一种新的思路。

关键词：羟基磷灰石锰抗菌感染性骨缺损光热

聚丙烯酸-钙(铈)纳米团簇荧光探针用于无机磷定量检测研究

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无机材料学报 2024年第9期39卷 1053-1062页

作者：陈甲范依然闫文馨韩颖超武汉理工大学材料复合新技术国家重点实验室武汉430070

无机磷主要以磷酸根的形式存在,在自然界生命循环和现代工业社会中发挥重要作用。磷酸根离子的快速高效定量检测一直是临床生化分析、工业生产和环境污染监测等领域的研究热点。本工作以聚丙烯酸(PAA)为络合剂,通过与Ca^(2+)和Ce^(3+)... 详细信息

无机磷主要以磷酸根的形式存在,在自然界生命循环和现代工业社会中发挥重要作用。磷酸根离子的快速高效定量检测一直是临床生化分析、工业生产和环境污染监测等领域的研究热点。本工作以聚丙烯酸(PAA)为络合剂,通过与Ca^(2+)和Ce^(3+)的络合反应,合成了具有良好分散性和稳定性的PAA-Ca(Ce)纳米团簇荧光探针。利用298 nm激发光照射该探针与磷酸根的反应产物,建立其在352nm处发射峰峰值强度与磷酸根浓度的线性关系图。实验结果表明,(Ca^(2+)+Ce^(3+))浓度为37.575 mmol/L的纳米荧光探针与磷酸根浓度的线性关系式为y=1.09x+2.05,荧光强度可靠性范围为13.5~66.91 mmol/L。与钼锑抗分光光度法测试磷酸根对比,该方法具有更高的回收率。大鼠血清无机磷检测实验验证了该方法的可靠性。以上结果表明本研究所合成的荧光探针具有良好的磷酸根定量检测性能。

关键词：稀土离子荧光探针无机磷检测

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纳米羟基磷灰石稳定悬浮体系的制备及其钴吸附性能

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无机化学学报 2024年第9期40卷 1763-1774页

作者：刘茎柯陈甲韩颖超武汉理工大学材料复合新技术国家重点实验室武汉430070 武汉理工大学材料科学与工程学院武汉430070 武汉理工大学湖北省生物材料工程技术研究中心武汉430070

为改善纳米羟基磷灰石(HAP)作为重金属离子吸附剂的吸附性能,模拟了人体中聚合物诱导的类液体前驱体矿化过程,利用聚丙烯酸(PAA)作调控剂通过水热法制备出了稳定悬浮的纳米HAP体系,探究了PAA的COOH与Ca的物质的量之比(R)、反应pH、水热... 详细信息

为改善纳米羟基磷灰石(HAP)作为重金属离子吸附剂的吸附性能,模拟了人体中聚合物诱导的类液体前驱体矿化过程,利用聚丙烯酸(PAA)作调控剂通过水热法制备出了稳定悬浮的纳米HAP体系,探究了PAA的COOH与Ca的物质的量之比(R)、反应pH、水热温度对制备的纳米HAP的影响。在优化出的合成条件(R=1、pH=9.00、180℃)下制备的纳米HAP是由细小颗粒组成的梭形结构,能够在保持几十纳米粒径尺寸的同时稳定悬浮。继而探究了吸附时间、初始金属离子浓度、吸附环境的pH、悬浮性对纳米HAP的Co^(2+)吸附性能的影响。吸附结果表明吸附动力学符合准二级动力学模型,吸附过程包括表面吸附与粒子内扩散。Freundlich、Langmuir模型线性方程拟合结果与实验结果均具有较高契合度,对应的Langmuir模型线性拟合最大吸附量为229.358 mg·g^(-1)。对Co^(2+)去除率随吸附环境pH(6.48~9.00)的升高而增大,主要吸附机制为表面配位反应。制备的纳米HAP悬浮液吸附量明显优于非悬浮的对照纳米HAP。

关键词：纳米羟基磷灰石聚丙烯酸吸附钴离子

Effect of Hydroxyapatitc Nanoparticles on K562 Cells in vitro

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Journal of Wuhan University of Technology(Materials Science) 2008年第2期23卷 222-224页

作者： CHEN Pei DAI Honglian han yingchao YIN Meizhen LI Shipu Biomedical Materials and Engineering Center Wuhan University of Technology Wuhan 430070 China Nursing school Wuhan Railway Vocational College of Technology Wuhan 430205 China

Stable and single-dispersed hydroxyapatite （HAP） nanoparticles were synthesized with ultrasonic-assisted method. HAP nanoparticles were characterized by dynamic light scattering, XRD （X-ray diffraction） and TEM （Transmission Electron Microscopy）. The effect of HAP nanoparticles on the K562 human myelogenous leukemia cell line was investigated by MTT assay and cell count test, and the mechanism was studied through the changes of cell cycle and ultrastructure. The results showed that HAP nanoparticles inhibited the proliferation of K562 cells dramatically in vitro. HAP nanoparticles entered the cytoplasm of K562 cells and the cells were arrested at G/M phase, thus, the cells died directly.

关键词： hydroxyapatite(HAP) nanoparticles K562 cells MTT assay cell cycle

Effects of the Interaction between Hydroxyapatite Nanoparticles and Hepatoma Cells

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Journal of Wuhan University of Technology(Materials Science) 2014年第3期29卷 635-642页

作者：尹美珍 XU Weiguo CUI Bingcun 戴红莲 han yingchao YIN Yixia LI Shipu School of Medicine Hubei Polytechnic University Tongji Hospital Tongji Medical College Huazhong University of Science and Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Biomedical Materials and Engineering Center Wuhan University of Technology

To gain a better understanding of the anticancer effects of hydroxyapatite （HAP） nanoparticles in vivo and in vitro, the effects of the interaction of HAP nanoparticles with hepatoma cells were explored. HAP nanoparticles were prepared by homogeneous precipitation and characterized by laser particle analysis and transmission electron microscopy （TEM）. HAP nanoparticles were observed to be uniformly distributed, with rod-like shapes and diameters in the range of 42.1-87.1 nm. Overnight attached, suspended, and proliferating Bel-7402 cells were incubated with HAP nanoparticles. Inverted microscopy observation revealed that HAP nanoparticles with a cell membrane showed good adsorption. TEM demonstrated that HAP nanoparticles were present on the surface of cells, continuously taken up by cells through endocytosis, and transported in vesicles close to the nucleus. Fluorescence microscopy showed that the concentrations of intracellular Ca2＋ labeled with Fluo-3 calcium fluorescent probe were significantly enhanced. In addition, inverted microscopy observation revealed that suspended cells treated with HAP nanoparticles did not adhere to the culture bottle, resulting in cell death. After the overnight attached cells were treated with HAP nanoparticles for 96 h with increasing doses of HAP nanoparticles, inverted microscopy observation revealed that cell proliferation was slowed and ceU-ceU adhesion was weakened. Feulgen staining and image analysis indicated that the nuclear DNA content of the cells was markedly reduced, and argyrophilic nucleolar organizer region （AgNOR） staining and image analysis indicated that the number of AgNORs was significantly decreased. Therefore, hepatoma cells brought about the adsorption, uptake, transport and degradation of HAP nanoparticles. In addition, HAP nanoparticles affected hepatoma cells with regard to cell-cell adhesion, cell and extracellular matrix adhesion, and DNA and protein synthesis; thus inhibiting cell proliferation. This und

关键词： hydroxyapatite nanoparticles hepatoma cells interaction effects cell adhesion

A New Type of Nanogel Carrier based on Mixed Pluronic Loaded with Low-Dose Antitumor Drugs

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Journal of Wuhan University of Technology(Materials Science) 2019年第4期34卷 960-967页

作者： YIN Meizhen YU Xin School of Medicine Hubei Polytechnic UniversityHuangshi 435003China School of Medicine Inner Mongolia University for NationalitiesInner Mongolia Tongliao 028000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and Biomedical Materials and Engineering CenterWuhan University of TechnologyWuhan 430070China

To design a new type of antitumor nanodrug carrier with good biocompatibility, a drug delivery system with a 2.19% drug-loading rate, measured by high-performance liquid chromatography(HPLC), was prepared by membrane hydration using a mixed polymer: Pluronic■ F-127, which binds folic acid(FA), Pluronic■ F-68 and triptolide(TPL)(FA-F-127/F-68-TPL). As a control, another drug delivery system based on a single polymer(FA-F-127-TPL) with a 1.90% drug-loading rate was prepared by substituting F-68 with F-127. The average particle sizes of FA-F-127/F-68-TPL and FA-F-127-TPL measured by a particle size analyzer were 30.7 nm and 31.6 nm, respectively. Their morphology was observed by atomic force microscopy(AFM). The results showed that FA-F-127-TPL self-assembled into nanomicelles, whereas FA-F-127/F-68-TPL self-assembled into nanogels. An MTT assay showed that a very low concentration of FA-F-127/F-68-TPL or FA-F-127-TPL could significantly inhibit the proliferation of multidrug-resistant(MDR) breast cancer cells(MCF-7/ADR cells) and induce cell death. The effects were significantly different from those of free TPL(P han that of FA-F-127-Nr(P < 0.01). A nude mice transplanted tumor model was prepared to monitor FA-F-127/F-68-Nr in the tumor tissue and organs by whole-body fluorescent imaging. The results showed that FA-F-127/F-68-Nr targeted tumor tissues. The prepared nanogels had small particle size, were easy to swallow, exhibited slow release property,targeted tumor cells, a

关键词： pluronic nanogels nanodrug carriers triptolide

Radio Frequencies Explosive Magnetic Flux Compression Generator and Its Military Applications

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Radio Frequencies Explosive Magnetic Flux Compression Genera...

Effects of Antihepatocarcinoma with Apatite Nanoparticles in vivo

2011 International Conference on Computer Science and Information Technology(ICCSIT 2011)

作者： han yingchao Li Hongmei Qiu Jinghui Microwave and Antenna Research Center. Harbin Institute of Technology

ISBN: (纸本)9781510811249;1510811249

Radio frequencies explosive magnetic flux compression generator, an alternative to the use of capacitors as the load for helical magnetic flux compression generator, can provide a larger energy-to-volume ratio given than other conventional systems. As a kind of maneuverable device for generating and radiating electromagnetic pulse, radio frequencies explosive magnetic flux compression generator which bases on the theory magnetic field frozen effect is driven by explosive go off. Although this kind of device only adds a small capacitor to helical magnetic flux compression generator, but its characteristic has changed dramatically. The most important is that it has higher high-frequency component compared with helical magnetic flux compression generator means that it is easier to generate impulse radiation. Radio frequencies explosive magnetic flux compression generator has been found widespread uses as pulsed power sources for many fields. Also, due to their nature as a true one-time-use device with superior energy density, a large portion of applications is defense related. In this paper, the development of magnetic flux compression generator in recent decades is introduced. According to equivalent circuit model, we discussed the working principle of radio frequencies explosive magnetic flux compression generator. Its applications as pulsed weapons in military filed are shown. One of them is electromagnetic bomb, which is a mature technology as an electromagnetic weapon, uses an intense electromagnetic field to create a brief pulse of energy that affects electronic circuitry without harming humans or buildings. This kind of technology is discussed. Of course, the development of pulse weapon is introduced too.

关键词： Radio frequencies explosive magnetic flux compression generator radiation frequency working principle military applications electromagnetic bomb

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Journal of Wuhan University of Technology(Materials Science) 2006年第4期21卷 102-104页

作者：尹美珍李世普 Biomedical Materials and Engineering Center Wuhan University of Technology Wuhan 430070 China

The inhibition effect of hydroxyapatite （ HAP ） nanoparticles on hepatocarcinoma was investigated in vivo. The human hepatocarcinoma cell line Bel- 7402 was transplanted subcutaneously into nude mice. Hydroxyapatite nanoparticles suspension at a dose of 0. 2 mL was injected into the transplanted tumors every day for 2 weeks, and saline was used us control. The efficacy of hydroxyapatite nanoparticles on this carcinoma was surveyed and morphological changes of tissue and cells were observed by light microscopy and transmission electron microscopy （TEM）. Experimental results show that hydroxyapatite nanoparticles have a visible destructive effect on the structures of hepatocarcinoma cells and tissue. The inhibition rates of tumor growth were 77.21% and 51. 32% after intra-tumor injection of hydroxyapatite nanoparticles for 1 week and 2 weeks, respectively. Compared with the control group, hydroxyapatite nanoparticles can also prolong the survival time of the nude mice bearing this cancer significantly. This indicates that hydroxyapatite nanoparticles have the therapeutic potential on hepatoma in vivo.

关键词： hydroxyapatite nanoparticles hepatocarcinoma transplantation nude mice

Physical and Chemical Transformation of Hydroxyapatite Nanoparticles in Aqueous Sol after Preparation and in vitro

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Journal of Wuhan University of Technology(Materials Science) 2005年第B12期20卷 283-286页

作者： I W Bauer 李世普 Biomedical Materials and Engineering Research Center Wuhan University of TechnologyWuhan 430070China

The co-precipitation method followed by ultrasound and heat treatment is a common way to prepare below 100 nm sized hydroxyapathe nanoparticles for biomedical studies and applications. The size and pH value of the obtained calcium phosphate nanoparticles in aqueous sol have a strong impact on the interactions with cells and tissue. The physical and chemical properties of material samples for in vitro and in vivo studies are often assumed to remain constant from the time after fabrication to the actual use. Only little attention is paid to eventual changes of the material over time or due to the different in vitro conditions. In this study, the physical and chemical transformation of calcium phosphate nanoparticles after preparation and in vitro was investigated. As the result showed, dispersed nano sized amorphons calcium phosphate precipitation as well as crystallized hydroxyapathe nanoparticles continue to crystallize even when kept at 4℃ leading to declining pH values and particle sizes. Due to the pH buffer in the medium the pH value of the cell culture remained stable after adding 20% nanoparticle sol in vitro. However, hydroxyapathe nanoparticles immediately became unstable in the presents of cell culture medium. The resulting loose agglomerations showed a size of above 500 nm.

关键词： Nanoparticles hydroxyapatite crystallization pH value particle size in vitro