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天然气水合物微波辅助开采模拟研究

当代化工研究 2024年第3期 54-57页

作者：王佳琪周昕霖葛坤哈尔滨工程大学黑龙江150001 哈尔滨工程大学青岛创新发展基地山东266400

为了提高天然气水合物开采效率及能量利用率,本文采用微波加热辅助开采,并根据南海神狐海域的水合物储层物性特征,建立了天然气水合物微波加热开采数值模型,模拟分析了不同微波加热方式下天然气水合物分解速率和能量利用率的变化情况。... 详细信息

为了提高天然气水合物开采效率及能量利用率,本文采用微波加热辅助开采,并根据南海神狐海域的水合物储层物性特征,建立了天然气水合物微波加热开采数值模型,模拟分析了不同微波加热方式下天然气水合物分解速率和能量利用率的变化情况。模拟结果表明:在使用纯微波加热开采水合物时,持续微波加热能够有效提升储层平均产气速率,而缩短微波加热时间能够有效提高能量利用率;在相同加热时间下,单循环加热的平均产气速率和能量利用率都要高于双循环加热。

关键词：微波加热天然气水合物数值模拟

Examining the Spatiotemporal Dynamics and Determinants of Land Urbanization in Prefecture-level Cities,China

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Chinese Geographical Science 2024年第1期34卷 19-33页

作者： YANG Zhen ZHU Huxiao ZHANG xinlin OU Xiangjun School of Geography Geomatics and Planning&Urban-rural Integration Development Research InstituteJiangsu Normal UniversityXuzhou221116China

Examining the spatiotemporal dynamics and determinants of land urbanization is critical for promoting healthy urban development and the rational use of land *** on the dataset consisting of land use change data and selected factors in 2010 and2020,this study used visual analysis to reveal the spatiotemporal dynamics of land urbanization across prefecture-level cities in ***,the driving forces underlying land urbanization were examined by using geographical detector *** are the findings:1)we find that there exist notable spatial variances in land urbanization across prefecture-level ***,the differentiation in land urbanization between the northern and southern cities is more pronounced than that between the coastal and inland cities,or between the eastern and western ***-level cities located in central and western China have experienced the most rapid growth in land ***,the growth rate in northeastern China is the lowest,while the velocity in eastern China remains relatively *** using spatial autocorrelation analysis,this study reveals that the land urbanization level in prefecture-level cities has significant spatial agglomeration.2)We further find that land urbanization in China is influenced by factors related to urban land supply and demand,and urban population growth,economic growth,land financial and political incentive have greater impact on land urbanization than other factors.3)We also find that the impacts of determinants on China’s land urbanization vary over time,the explanatory power of economic development increased,while the explanatory power of state forces *** argue that integrating the supply and demand factors of land urbanization can provide a more comprehensive understanding of the driving mechanisms underlying land urbanization in China and other transitional countries,and help decision-makers in these countries formulate more detailed and specif

关键词： land urbanization spatial pattern influencing factor geographical detector China

A frequency servo SoC with output power stabilization loop technology for miniaturized atomic clocks

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Journal of Semiconductors 2024年第6期45卷 13-22页

作者： Hongyang Zhang xinlin Geng Zonglin Ye Kailei Wang Qian Xie Zheng Wang School of Integrated Circuit Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

A frequency servo system-on-chip(FS-SoC)featuring output power stabilization technology is introduced in this study for high-precision and miniaturized cesium(Cs)atomic *** proposed power stabilization loop(PSL)technique,incorporating an off-chip power detector(PD),ensures that the output power of the FS-SoC remains stable,mitigating the impact of power fluctuations on the atomic clock's ***,a one-pulse-per-second(1PPS)is employed to syn-chronize the clock with *** using 65 nm CMOS technology,the measured phase noise of the FS-SoC stands at-69.5 dBc/Hz@100 Hz offset and-83.9 dBc/Hz@1 kHz offset,accompanied by a power dissipation of 19.7 *** Cs atomic clock employing the proposed FS-SoC and PSL obtains an Allan deviation of 1.7×10^(-11) with 1-s averaging time.

关键词： CMOS technology atomic clock phase-locked loop output power stabilization 1PPS

Fabrication of pollution-free coal gangue-based catalytic material utilizing ferrous chloride as activator for efficient peroxymonosulfate activation

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International Journal of Coal Science & Technology 2024年第1期11卷 103-118页

作者： Zhiming Sun xinlin Wang Shaoran Jia Jialin Liang Xiaotian Ning Chunquan Li School of Chemical and Environmental Engineering China University of Mining and Technology(Beijing)Beijing100083China Key Laboratory of Coal Processing and Efficient Utilization (China University of Mining and Technology)Ministry of EducationXuzhou221116China

Novel coal gangue-based persulfate catalyst(CG-FeCl_(2))was successfully synthesized by the means of calcinating under nitrogen atmosphere with the addition of ferrous chloride tetrahydrate(FeCl_(2)·_(4)H_(2)O).The phase transformation of the prepared materials and gas products during the heating process are thoroughly *** is suggested that ferrous chloride participated in the phase transformation and formed Si-O-Fe *** the main gaseous products are H_(2)O,H_(2),and HCl during the heating ***,the ability of CG-FeCl_(2) to activate peroxymonosulfate(PMS)for catalytic degradation of polycyclic aromatic hydrocarbons(PAHs)and phenol was deeply *** than 95%of naphthyl,phenanthrene and phenol were removed under optimizied *** addition,1O_(2),·OH,and SO_(4)·−were involved in the CG-FeCl_(2)/PMS system from the free radical scavenging experiment,where 1O_(2) played a major role during the oxidation ***,CG-FeCl_(2)/PMS system exhibited superior stability in a relatively wide pH range and the presence of common anion from related degradation ***,the novel CG-FeCl_(2) is an efficient and environmentally friendly catalyst,displaying potential application prospect in the field of PAHs and phenol-contaminated wastewater treatment.

关键词： Coal gangue Persulfate activation Advanced oxidation processes Polycyclic aromatic hydrocarbons Phenol Ferrous chloride

Postnatal development of rat retina:a continuous observation and comparison between the organotypic retinal explant model and in vivo development

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Neural Regeneration Research 2025年第3期20卷 900-912页

作者： Baoqi Hu Rui Wang Hanyue Zhang Xiou Wang Sijia zhou Bo Ma Yan Luan Xin Wang xinlin Chen Zhichao Zhang Qianyan Kang Department of Ophthalmology The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi ProvinceChina Department of Ophthalmology The First Affiliated Hospital of Northwest UniversityXi’anShaanxi ProvinceChina Institute of Neurobiology Xi’an Jiaotong University Health Science CenterXi’anShaanxi ProvinceChina

The organotypic retinal explant culture has been established for more than a decade and offers a range of unique advantages compared with in vivo experiments and cell ***,the lack of systematic and continuous comparison between in vivo retinal development and the organotypic retinal explant culture makes this model controversial in postnatal retinal development ***,we aimed to verify the feasibility of using this model for postnatal retinal development studies by comparing it with the in vivo *** this study,we showed that postnatal retinal explants undergo normal development,and exhibit a consistent structure and timeline with retinas in ***,we used SOX2 and PAX6 immunostaining to identify retinal progenitor *** then examined cell proliferation and migration by immunostaining with Ki-67 and doublecortin,***-67-and doublecortin-positive cells decreased in both in vivo and explants during postnatal retinogenesis,and exhibited a high degree of similarity in abundance and distribution between ***,we used Ceh-10 homeodomain-containing homolog,glutamate-ammonia ligase(glutamine synthetase),neuronal nuclei,and ionized calcium-binding adapter molecule 1 immunostaining to examine the emergence of bipolar cells,Müller glia,mature neurons,and microglia,*** timing and spatial patterns of the emergence of these cell types were remarkably consistent between in vivo and explant *** study showed that the organotypic retinal explant culture model had a high degree of consistency with the progression of in vivo early postnatal retina *** findings confirm the accuracy and credibility of this model and support its use for long-term,systematic,and continuous observation.

关键词： bipolar cells differentiation in vivo microglia Müller glia organotypic retinal explant culture postnatal retina development proliferation retinal progenitor cells

Optical trapping-enhanced probes designed by a deep learning approach

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Photonics Research 2024年第5期12卷 959-968页

作者： MIAO PENG GUANGZONG XIAO xinlin CHEN TE DU TENGFANG KUANG XIANG HAN WEI XIONG GANGYI ZHU JUNBO YANG ZHONGQI TAN KAIYONG YANG HUI LUO College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China College of Electronic Information and Physics Central South University of Forestry and TechnologyChangsha 410004China Nanhu Laser Laboratory National University of Defense TechnologyChangsha 410021China Center of Material Science National University of Defense TechnologyChangsha 410073China College of Communication and Information Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China

Realizing optical trapping enhancement is crucial in biomedicine,fundamental physics,and precision *** the metamaterials with artificially engineered permittivity as photonic force probes in optical tweezers will offer unprecedented opportunities for optical trap ***,it usually involves multi-parameter optimization and requires lengthy calculations;thereby few studies remain despite decades of research on optical ***,we introduce a deep learning(DL)model to attack this *** DL model can efficiently predict the maximum axial optical stiffness of Si∕Si_(3)N_(4)(SSN)multilayer metamaterial nanoparticles and reduce the design duration by about one order of *** experimentally demonstrate that the designed SSN nanoparticles show more than twofold and fivefold improvement in the lateral(k_(x)and k_(y))and the axial(k_(z))optical trap stiffness on the high refractive index amorphous TiO_(2)*** the DL model in optical manipulation systems will expedite the design and optimization processes,providing a means for developing various photonic force probes with specialized functional behaviors.

关键词： trapping optimization stiffness

Initiation, organizational modes and environmental conditions of severe convective wind events during the warm season over North China

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Science China Earth Sciences 2024年第9期67卷 2876-2894页

作者： Yue HUANG Jianhua SUN Yuanchun ZHANG Ruoyun MA xinlin YANG Fuyou TIAN Key Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS) Institute of Atmospheric PhysicsChinese Academy of Sciences University of the Chinese Academy of Sciences Earth System Modeling and Prediction Center China Meteorological Administration College of Aviation Meteorology Civil Aviation Flight University of China National Meteorological Center China Meteorological Administration

Based on the significant weather report, CG lightning, composite radar reflectivity, and ERA5 reanalysis data, we first studied the spatiotemporal distribution characteristics of four types(only severe convective wind(SCW); SCW and hail;SCWand short-duration heavy rainfall(SDHR); and SCW, hail, and SDHR) of convective weather events related to SCW during the warm season(May to September) from 2011 to 2018 in North China. Second, severe convective cases producing SCW were selected to statistically analyze the initiation, decay, lifetime, and organizational characteristics of convective systems. Finally,using ERA5 reanalysis data and conventional surface observation data, preconvective soundings were constructed to explore the differences in environmental conditions for initiating convective systems between SCW and non-SCW. The results indicate that mixed-type of SCW and SDHR events occur more frequently over plains, while other types of convective weather occur more frequently over mountains. The frequency peak of SCW occurs in June, while mixed convective weather peaks in July. The initiation time of convective systems is concentrated between 1000 and 1300 BST, with a peak at 1200 BST. Over mountains, the daily peaks of ordinary and significant SCW generally occur at 1700–1800 BST and 1600–1700 BST, respectively, while over plains, the peak of ordinary SCW typically lags behind that of mountains by 1–2 hours. Additionally, SCW systems are mainly initiated over mountains, with most lifetimes lasting 7–13 hours. Nonlinear convective systems produce the most SCW events,followed by trailing-stratiform convective systems. The convective available potential energy(CAPE), downdraft convective available potential energy, and the temperature difference between 850 and 500 hPa can all distinguish between SCW systems and non-SCW systems occurring over plains. Compared to non-SCW convective systems, SCW convective systems over mountains are more likely to occur in environments

关键词： Severe convective wind Convective systems Initiation Organizational modes Environmental conditions

Chiral transfer amidst one-dimensional linear polymers and twodimensional network covalent organic frameworks:Striking a fine balance between helicity and crystallinity

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Nano Research 2024年第6期17卷 5726-5734页

作者： xinlin Zha Mengjuan Zuo Guilin Xu Zhong Yan Haining You Yi Xiong Ying Liu Yingying Li Liyan Yang Ke Liu Mufang Li Tao Zhao Dong Wang College of Chemistry and Chemical Engineering Donghua UniversityShanghai 201620China Key Laboratory of Textile Fiber and Products Ministry of EducationWuhan Textile UniversityWuhan 430200China

The current landscape of chiral covalent organic frameworks(COFs)predominantly centered on constructing asymmetric molecular-scale chirality,often introducing an inherent contradiction to the COF symmetry and limiting ***,we overcome these challenges by achieving chiral transfer between one-dimensional(1D)imine linear polymers(LPs)and two-dimensional(2D)networkβ-ketoenamine COFs composed of achiral *** successfully synthesize several 1D imine LPs with mesoscopic helical chirality,comprising achiral C2-symmetric terephthalaldehyde and diamine linkers in a chiral supramolecular transcription *** the irreversible tautomerism mechanism within the linker replacement approach,terephthalaldehyde(TPA)units in these helical 1D LPs are substituted with C3-symmetric 1,3,5-triformylphloroglucinol(TP),yielding the corresponding 2D networkβ-ketoenamine *** and helicity of the resultantβ-ketoenamine COFs intimately hinge on reaction conditions,including the aldehyde stoichiometry of Tp and TPA,as well as the quantity and concentration of the catalyst *** optimized conditions,the nucleation and growth were precisely governed,achieving a harmonious equilibrium of crystallinity and helicity within the generated 2D networkβ-ketoenamine COFs,even with covalent bond rupture,recombination,and topological transition(from[C2+C2]to[C3+C2]).Impressively,the ground state chirality inherent to helical 1D LPs seamlessly transfers to helical 2D networkβ-ketoenamine *** study not only offers new perspectives on the development of chiral functional COFs,but also provides fresh insights into the precise control of COFs'microscopic morphology.

关键词： chiral covalent organic frameworks chiral transfer dimensional transformation helicity

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苦草属植物雄花果实种子显微结构研究

西北植物学报 2024年第1期44卷 122-126页

作者：容鑫林周忠泽安徽大学资源与环境工程学院合肥230601

【目的】苦草属植物外部形态相似,叶线形或带形,野外难以直接鉴定到种,而雄花雄蕊数目、果实和种子的显微结构是苦草属(Vallisneria)植物物种的鉴别性特征之一。苦草属物种的雄花小,仅有1.5 mm,人工解剖雄花观察方法难以实现雄花雄蕊数... 详细信息

【目的】苦草属植物外部形态相似,叶线形或带形,野外难以直接鉴定到种,而雄花雄蕊数目、果实和种子的显微结构是苦草属(Vallisneria)植物物种的鉴别性特征之一。苦草属物种的雄花小,仅有1.5 mm,人工解剖雄花观察方法难以实现雄花雄蕊数目的识别。【方法】采用雄株雄佛焰苞水培预培养技术获取自然开放的雄花,并利用解剖学显微镜对3种苦草属植物雄花、果实和种子进行解剖观察和研究。【结果】苦草(***)雄蕊1枚,果实圆柱形,表面光滑,种子无翅,具纵条纹;刺苦草(***)雄蕊2枚,果实三棱形,棱上具刺,种子具翅;密刺苦草(***)雄蕊2枚,果实三棱圆柱形,表面光滑,种子无翅。【结论】密刺苦草、刺苦草、长梗苦草(***)和安徽苦草(***)是安徽苦草属新分布记录种,其中长梗苦草和安徽苦草是分布于安徽的新种。

关键词：水培显微结构苦草属新分布安徽