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Research in Astronomy and Astrophysics 2024年第9期24卷 190-198页

作者： Xiaoying Guo Wasim Iqbal qiang chang Xiao-Hu Li School of Physics and Optoeletronic Engineering Shandong University of TechnologyZibo 255000China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesUrumqi 830011China

We use microscopic Monte Carlo simulation techniques to investigate the impact of H_(2)diffusion energy on the recombination efficiency of H_(2)on interstellar dust grain surfaces under diffuse and translucent cloud *** constructed five models representing different possible conditions encountered by adsorbed H and H_(2)on interstellar dust *** implemented adsorption sites with multiple binding energies for surface species;the Encounter-Desorption mechanism was also *** study focused on silicate surfaces in diffuse clouds and water ice surfaces in translucent *** results show that the recombination efficiency of H_(2)on dust surfaces decreases as H_(2)diffusion energy *** interesting finding of this work is that considering different binding sites for H and H_(2)gives rise to multiple steady phases,during which the recombination efficiency remains constant with a change in H_(2)diffusion energy.

关键词： astrochemistry atomic processes ISM:molecules

Advanced nanomedicines and immunotherapeutics to treat respiratory diseases especially COVID-19 induced thrombosis

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World Journal of Clinical Cases 2024年第16期12卷 2704-2712页

作者： Jie Wu Ying Zheng Li-Na Zhang Cai-Li Gu Wang-Li Chen Min-qiang chang Department of Respiratory and Oncology 72nd Group Army Hospital of PLAHuzhou 313000Zhejiang ProvinceChina Department of Otorhinolaryngology 72^(nd)Group Army Hospital of PLAHuzhou 313000Zhejiang ProvinceChina

Immunotherapy and associated immune regulation strategies gained huge attraction in order to be utilized for treatment and prevention of respiratory *** specifically nanomedicines can be used to regulate host immunity in lungs in the case of respiratory diseases including coronavirus disease 2019(COVID-19)***-19 causes pulmonary embolisms,thus new therapeutic options are required to target thrombosis,as conventional treatment options are either not effective due to the complexity of the immunethrombosis *** this review,we discuss regulation of immune response in respiratory diseases especially *** further discuss thrombosis and provide an overview of some antithrombotic nanoparticles,which can be used to develop nanomedicine against thrombo-inflammation induced by COVID-19 and other respiratory infectious *** also elaborate the importance of immunomodulatory nanomedicines that can block pro-inflammatory signalling pathways,and thus can be recommended to treat respiratory infectious diseases.

关键词： Nanomedicines Immunotherapeutics Respiratory diseases COVID-19 Thrombosis

工科类高职院校学生心理健康状况及教育提升策略研究

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浙江交通职业技术学院学报 2024年第2期25卷 51-56页

作者：孙常强浙江交通职业技术学院浙江杭州311112

随着社会的快速发展和教育改革的不断深入,工科类高职院校学生面临的学业和职业上的压力日益增大,心理健康问题突出。通过实证研究,深入分析了工科类高职院校学生心理健康问题产生的原因及影响因素,提出了构建四层心理健康干预模式、建... 详细信息

随着社会的快速发展和教育改革的不断深入,工科类高职院校学生面临的学业和职业上的压力日益增大,心理健康问题突出。通过实证研究,深入分析了工科类高职院校学生心理健康问题产生的原因及影响因素,提出了构建四层心理健康干预模式、建立女性互助支持团体、打造四位一体健康教育体系、构建多元化宣传教育氛围的教育提升策略。

关键词：工科类高职院校心理健康状况提升策略

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同态加密下复杂网络信息数据防泄露方法

计算机仿真 2024年第2期41卷 482-486页

作者：谌昌强尚永强信阳农林学院信息工程学院河南信阳464000 武汉理工大学湖北武汉430070

复杂网络中的数据普遍具有隐私性,黑客攻击和网络钓鱼等使得传输数据易出现泄露问题。由于复杂网络数据通常是大规模的、多源的、异构的,数据噪声较大,数据的防泄露处理难度也较大。因此,引入同态加密,设计一种新的复杂网络信息数据防... 详细信息

复杂网络中的数据普遍具有隐私性,黑客攻击和网络钓鱼等使得传输数据易出现泄露问题。由于复杂网络数据通常是大规模的、多源的、异构的,数据噪声较大,数据的防泄露处理难度也较大。因此,引入同态加密,设计一种新的复杂网络信息数据防泄露方法。通过窗口展开划分,分别对每个窗口进行降噪处理,引入小波阈值二次降噪,利用数据重构获取降噪后的复杂网络信息数据。基于此,输出密钥,获取公钥函数,构建复杂网络信息数据同态加密机制,完成复杂网络信息数据防泄露。实验测试证明,所提方法不仅可以有效降低加密时间,同时还可以去除复杂网络信息数据中的噪声。

关键词：同态加密复杂网络数据泄露小波阈值公钥函数

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埋地局域共振超屏障衰减地震表面波研究

工程力学 2024年第10期41卷 1-11页

作者：曾超赵春风陈昌强合肥工业大学土木与水利工程学院合肥230009 中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室哈尔滨150080

局域共振超材料突破了Bragg散射型周期结构在低频应用的困境,实现结构的小尺寸控制大波长,因此该文提出将谐振器单元沿深度方向周期性布置形成埋地超屏障,并探究其对低频地震表面波的衰减性能。基于局域共振超材料的有效质量概念和有效... 详细信息

局域共振超材料突破了Bragg散射型周期结构在低频应用的困境,实现结构的小尺寸控制大波长,因此该文提出将谐振器单元沿深度方向周期性布置形成埋地超屏障,并探究其对低频地震表面波的衰减性能。基于局域共振超材料的有效质量概念和有效介质方法,推导了全共振半空间和有限埋深超屏障中Rayleigh波的频散方程,并编制相应的计算程序求解得到理论频散关系。采用有限元分析软件COMSOL MULTIPHYSICS建立全共振半空间和有限埋深超屏障的二维单胞有限元模型,通过特征频率分析求解埋地超屏障的数值频散关系,验证理论简化分析方法的有效性,同时利用数值方法研究了超屏障埋深对频率带隙宽度的影响。建立有限埋地超屏障和Bragg散射型周期波屏障的传输分析模型,通过频域分析和瞬态分析方法研究了两种波屏障在谐波激励和地震动下的动力响应。研究表明:埋地超屏障具有带隙起始频率低、设计灵活的特点,对表面地震动具有明显的衰减效果,有望作为一种新型隔震技术应用于工程实践。

关键词：埋地超屏障局域共振带隙特性地震表面波衰减性能

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The Semiclassical Limit in the Quantum Drift-Diffusion Model

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Acta Mathematica Sinica,English Series 2009年第2期25卷 253-264页

作者： qiang chang JU Institute of Applied Physics and Computational Mathematics P. O. Box 8009-28 Beijing 100088 P. R. China

Semiclassical limit to the solution of isentropic quantum drift-diffusion model in semicon- ductor simulation is discussed. It is proved that the semiclassical limit of this solution satisfies the classical drift-diff... 详细信息

关键词： quantum drift-diffusion weak solution semiclassical limit isentropic

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一种高温高矿化度复合冻胶的研制与应用

化学研究与应用 2024年第1期36卷 184-190页

作者：李勇唐昌强雷兵罗庆高金成都欧美克石油科技有限公司四川成都610225

为了解决高温高矿化度油藏深部调驱问题,以丙烯酰胺(AM)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)和N,N-二甲基丙烯酰胺(DMAA)为原料合成共聚物PASD,并以酚醛树脂作为交联剂、硫脲作为稳定剂,添加增强剂MZQ制备得到复合冻胶体系。通过红外光谱... 详细信息

为了解决高温高矿化度油藏深部调驱问题,以丙烯酰胺(AM)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)和N,N-二甲基丙烯酰胺(DMAA)为原料合成共聚物PASD,并以酚醛树脂作为交联剂、硫脲作为稳定剂,添加增强剂MZQ制备得到复合冻胶体系。通过红外光谱仪、扫描电镜、岩心流变仪等对冻胶体系进行应用研究,考察了共聚物PASD、交联剂、稳定剂、增强剂加量的影响,确定复合冻胶体系的最佳配方;在150℃、矿化度为25.198×10^(4) mg·L^(-1)下条件下应用,其冻胶强度为Ⅰ级,抗老化脱水性能良好,有效耐温脱水时间超过180d;冻胶封堵能力超过93%,具有良好的封堵性能以及抗盐耐温性能。

关键词：高温高矿化度调剖堵水冻胶体系

Exploring Sulfur Chemistry in TMC-1 with NSRT

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Chinese Physics Letters 2024年第2期41卷 129-132页

作者： Wasim Iqbal Xiaohu Li Juan Tuo Ryszard Szczerba Yanan Feng Zhenzhen Miao Jiangchao Yang Jixing Ge Gleb Fedoseev Donghui Quan qiang chang Chuan-Lu Yang Tao Yang Gao-Lei Hou Yong Zhang Xuan Fang Xia Zhang Fangfang Li Rong Ma Xiaomin Song Zhiping Kou Yuxuan Sun Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Nicolaus Copernicus Astronomical Center Rabia´nska 887-100 Toru´nPoland Research Laboratory for Astrochemistry Ural Federal UniversityKuibysheva St.48620026 EkaterinburgRussia Astronomical Computing Research Center Zhejiang LaboratoryHangzhou 311100China School of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China School of Physics and Optoelectronic Engineering Ludong UniversityYantai 264025China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiaotong UniversityXi’an 710049China School of Physics and Astronomy Sun Yat-sen UniversityGuangzhou 510275China Laboratory for Space Research Faculty of ScienceThe University of Hong KongHong KongChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100012China

There have been several studies on sulfur depletion in dense cores like TMC-1(Taurus Molecular Cloud 1),employing updated reaction networks for sulfur species to explain the missing sulfur in the gas within dense *** of these studies used a C/O ratio of 0.7 or *** present NSRT(NanShan 26m Radio Telescope)observations of TMC-1 alongside results from time-dependent chemical simulations using an updated chemical *** findings highlight the impact of the C/O ratio on the gas-phase evolution of C2S and *** simulation results show that the C/O ratio is an important parameter,playing a fundamental role in determining the gas-phase abundances of sulfur species in dense cores.

关键词： sulfur Sulfur depletion

Fracture analysis of rock mass based on 3-D nonlinear Finite Element Method

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Science China(Technological Sciences) 2011年第3期54卷 556-564页

作者： LIU YaoRu chang qiang YANG qiang WANG ChuanQi GUAN FuHai State Key Laboratory of Hydroscience and Hydraulic Engineering Tsinghua University Beijing 100084 China

Traditional fracture analysis is based on fracture mechanics and damage mechanics. They focus on the propagation of the fracture. However, their propagation criterions are not easily applied in practice and the current analysis is limited in planar problem. This paper presents a new theory that the occurrence of the unbalanced force (derived from the Deformation Reinforcement Theory) could be the criterion of the initiation of the fracture, and the distribution area and propagation of the unbalanced force could be the indication of the fracture propagation direction. By aggregate analysis with Stress Intensity Factor (SIF) criterion, the unbalanced force actually is the opposite external load that is the SIF difference incurred between the external loads and permitted by the structure. Numerical simulation and physical experiments on pre-fracture cuboid rock specimens proved that the occurrence of the unbalanced force could be the initiation of the fracture. Mesh size dependence was also considered by analysis of different mesh size finite element gravity dam models. Furthermore, the theory was applied to the feasibility analysis of the Baihetan arch dam together with physical experiments in order to evaluate the fracture propagation of dam heel. The results show that it is an effective way to use unbalanced force to analyze the fracture initiation and propagation when performing 3-dimensional nonlinear FEM calculation.

关键词： fracture analysis rock mass unbalanced force plastic complementary energy norm nonlinear finite element method

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饰面人造板材的生命周期碳足迹评价

林产工业 2024年第4期61卷 59-63页

作者：崔丽娜安然丁观芬强丹丹段昌强朱剑刚南京林业大学家居与工业设计学院江苏南京210037 北京绿林认证有限公司北京100005 德华兔宝宝装饰新材股份有限公司浙江德清313200

为量化评估饰面人造板材生产过程中所产生的环境影响,探索产品的低碳优化方向,本文运用生命周期评价法,聚焦产品碳足迹这一环境属性,对饰面人造板材产品生命周期过程的碳足迹进行了量化分析。以某公司产品的碳足迹评价过程为例,以0.5 m... 详细信息

为量化评估饰面人造板材生产过程中所产生的环境影响,探索产品的低碳优化方向,本文运用生命周期评价法,聚焦产品碳足迹这一环境属性,对饰面人造板材产品生命周期过程的碳足迹进行了量化分析。以某公司产品的碳足迹评价过程为例,以0.5 mm重组装饰单板为评价对象,进行实地数据收集与计算。结果表明:该重组装饰单板1 m^(2)的产品碳足迹总和值为2.79 kg CO_(2)eq,其高碳排放单元过程为生产制造阶段,碳足迹为1.13 kg CO_(2)eq。热蒸汽能源的使用对碳排放贡献的影响最大,主要发生于染色漂白和单板干燥工序。因此,针对染色漂白和单板干燥工序进行低碳优化,对于降低产品碳足迹具有重要的意义。

关键词：饰面人造板材重组装饰单板生命周期评价碳足迹低碳优化