检索结果-南通市图书馆

Quantum public-key crypto via EPR pairs

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 54-59页

作者： Xiang-Qun Fu hong-Wei Li Jian-hong Shi tan Li Wan-Su Bao Henan Key Laboratory of Quantum Information and Cryptography Information Engineering UniversityZhengzhou 450004China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China

With the development of quantum computing technology,quantum public-key cryptography is gradually becoming an alternative to the existing classical public-key *** paper designs a quantum trapdoor one-way function via EPR pairs and quantum *** on this,a new quantum public-key cryptosystem is presented,which offers forward security,and can resist the chosen-plaintext attack and chosen-ciphertext *** with the existing quantum public-key cryptos,eavesdropping can be automatically detected in this new quantum public-key cryptosystem under a necessary condition,which is also detailed in the paper.

关键词： quantum public-key crypto trapdoor one-way function EPR pairs

球囊在经皮肾镜经上肾盏建立通道中的应用研究

在线全文

学校读者我要写书评

暂无评论

临床泌尿外科杂志 2008年第3期23卷 203-205页

作者：张勇 tan yeh hong 首都医科大学附属北京朝阳医院泌尿外科北京100020 新加坡中央医院泌尿中心

目的:比较使用球囊扩张或套叠式金属扩张器在经皮肾镜(PCNL)经上肾盏建立通道中的有效性和安全性。方法:回顾性分析27例肾结石PCNL经上肾盏建立通道患者的临床资料。12例患者采用球囊对穿刺通道进行扩张,15例患者采用套叠式金属扩张器... 详细信息

目的:比较使用球囊扩张或套叠式金属扩张器在经皮肾镜(PCNL)经上肾盏建立通道中的有效性和安全性。方法:回顾性分析27例肾结石PCNL经上肾盏建立通道患者的临床资料。12例患者采用球囊对穿刺通道进行扩张,15例患者采用套叠式金属扩张器对穿刺通道进行扩张。结果:使用球囊扩张的患者均扩张成功,使用金属扩张器的1例患者因导丝和扩张器脱出而失败。使用球囊扩张的手术时间短于使用金属扩张器,但手术费用高于使用金属扩张器,且差异均有统计学意义(P<0.01)。使用球囊扩张的净石率为87.5%,使用金属扩张器的净石率为77.8%。结论:球囊扩张在PCNL经上肾盏建立通道中的应用安全、有效,但费用较高。

关键词：肾结石球囊扩张经皮肾镜

Catalytic production of high-energy-density spiro polycyclic jet fuel with biomass derivatives

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第2期101卷 760-768页

作者： Wen-Jing Zhang Yan-Cheng Hu Yan-hong tan Jia Li Ning Li Jing-Pei Cao School of Chemical Engineering and Technology China University of Mining and Technology CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

High-energy-density（HED） fuel（*** used JP-10 and RJ-4）,featuring compact 3D polycyclic structure with high strain,is of critical importance for volume-limited military aircraft,since their high density and combustion heat can provide more propulsion *** reduce the reliance on petroleum source,it is highly desirable to develop renewable alternatives for the production of strained polycyclic HED fuel,but which remains a big challenge because of the inaccessibility caused by the high strain,We herein demonstrate a three-step catalytic route towards highly strained C17and C18spirofuel with biomass *** process includes catalytic aldol condensation of renewable cyclohexanone/cyclopentanone with benzaldehyde,catalytic spiro Diels-Alder（D-A） reaction of aldol adduct with isoprene,and catalytic *** key spiro D-A reaction is enabled by the catalysis of heterogeneous Lewis acidic ionic *** chloroaluminate IL,formed by benign urea and AICl3,exhibits good catalytic performance and reusability for this *** eventual hydrodeoxygenation（HDO）over Pd/C and H-Y produces strained tricyclic spirofuel with density>0.93 g/mL,combustion heat>41 MJ/L and freezing point <-40℃,which are better than the properties of tactical fuel ***,it is anticipated that the as-prepared renewable fuels have the potential to replace traditional petroleum-derived HED fuels.

关键词： Biomass derivatives Cycloaddition High-energy-density Lewis acidic ionic liquid Spiro polycyclic fuel

Iron scrap derived nano zero-valent iron/biochar activated persulfate for p-arsanilic acid decontamination with coexisting microplastics

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第5期151卷 733-746页

作者： Zihan Shu Hailan Yang Shujing Ye hong Li Zhiming Yang Chuang Li Xiaofei tan Shaobo Liu Hou Wang College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangsha 410082China Shenzhen Research Institute of Hunan University Shenzhen 518055China School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China College of Resources and Environment University of Chinese Academy of SciencesBeijing 101408China School of Architecture and Art Central South UniversityChangsha 410083China School of Metallurgy and Environment Central South UniversityChangsha 410083China

P-arsanilic acid(AA)has received widespread attention because of its conversion to more toxic inorganic arsenic compounds(arsenate and arsenite)in the natural *** removal process and mechanisms with co-existence of microplastics remain *** this study,biochar loaded with nano zero-valent iron(nZVI)particles(ISBC)was prepared by using iron scrap obtained from a steel works and wood chips collected from a wood processing *** advanced oxidation system of sodium persulfate(PDS)activated by ISBC was applied for AA degradation and inorganic arsenic control in aqueous *** than 99%of the AA was completely degraded by the ISBC/PDS system,and the As(III)on AA was almost completely oxidized to As(V)and finally removed by ***_(3)−inhibited the removal of AA by the ISBC/PDS system,while Cl^(−)had a dual effect that showing inhibition at low concentrations yet promotion at high *** effect of microplastics on the degradation of AA by the ISBC/PDS system was further investigated due to the potential for combined microplastic and organic arsenic contamination in rural/remote *** were found to have little effect on AA degradation in the ISBC/PDS system,while affect the transport of inorganic arsenic generated from AA ***,this study provides new insights and methods for efficient removal of p-arsanilic acid from water with coexisting microplastics.

关键词： P-arsanilic acid Biochar Arsenate and arsenite Microplastics

Clinicopathological features and treatment of gastrointestinal schwannomas

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2025年第5期31卷 32-42页

作者： Peng-Cheng Zhang Shu-Hui Wang Jun Li Jing-Jie Wang hong-tan Chen Ai-Qing Li Department of Gastroenterology The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003Zhejiang ProvinceChina Department of Epidemiology&Health Statistics School of Public HealthSchool of MedicineZhejiang UniversityHangzhou 310058Zhejiang ProvinceChina Department of Pathology The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003Zhejiang ProvinceChina

BACKGROUND Gastrointestinal schwannomas(GIS)are rare neurogenic tumors arising from Schwann cells in the gastrointestinal *** on GIS are limited to small case reports or focus on specific tumor sites,underscoring the diagnostic and thera-peutic challenges they *** To comprehensively examine the clinical features,pathological characteristics,treatment outcomes,associated comorbidities,and prognosis of *** The study population included patients diagnosed with GIS at the First Affiliated Hospital,Zhejiang University School of Medicine,between June 2007 and April *** were retrospectively collected and analyzed from medical records,including demographic characteristics,endoscopic and imaging findings,treatment modalities,pathological evaluations,and follow-up *** In total,229 patients with GIS were included,with a mean age of 56.00 years and a male-to-female ratio of 1:*** mean tumor size was 2.75 cm,and most(76.9%)were located in the ***,6.6%of the patients had other malig-nant *** imaging and endoscopy frequently misdiagnosed GIS as gastrointestinal stromal ***,accurate preoperative diagnosis was achieved using endoscopic ultrasound-guided fine-needle aspiration combined with immunohistochemical analysis,in which S100 and SOX-10 markers were mostly *** tumors were typically managed with endoscopic resection,while larger lesions were treated with surgical ***-up results showed that most patients experienced favorable *** Preoperative diagnosis of GIS via clinical characteristics,endoscopy,and imaging examinations remains challenging but *** therapy provides a minimally invasive and effective option for patients.

关键词： Gastrointestinal schwannoma Diagnosis Treatment Endoscopictherapy Complications

The Stereocomplex Crystallites Improve the Stability of Biodegradable Poly(L-lactic acid)/Poly(D-lactic acid)Melt-Blown Nonwovens

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2025年第2期43卷 368-379页

作者： Jin-Shuo Yu Yue-Wei Huan hong-Wei Pan Zhi-Gang Liu Yan Zhao Zhi-Yong tan Jun-Jia Bian Hui-Li Yang Hui-Liang Zhang Key Laboratory of Polymer Ecomaterials Chinese Academy of SciencesChangchun Institute of Applied ChemistryChangchun130022China College of Material and Engineering School of Chemical EngineeringEngineering Research Center of Synthetic Resin and Special FiberMinistry of EducationChangchun University of TechnologyChangchun130012China Shandong Fufeng Fermentation Co. Ltd.Shandong276600China National Engineering Research Center of Corn Deep Processing Jilin COFCO Biochemistry Co.Ltd.Changchun130033China

Poly(lactic acid)(PLA)is a biodegradable and eco-friendly polymer that is increasingly being incorporated into various applications in contemporary ***,the limited stability of PLA-based products remains a significant challenge for their broader use in various *** this study,poly(L-lactic acid)(PLLA)/poly(D-lactic acid)(PDLA)melt-blown nonwovens were prepared by melt *** structure,thermal properties,thermal stability,biodegradability and crystalline morphology of the melt-blown nonwovens were *** and WAXD confirmed the formation of stereocomplex(SC)crystallites in the PLLA *** storage modulus(G′),loss modulus(G″),and complex viscosity(∣η^(*)∣)of the PLLA/PDLA blend increased with an increase in SC crystallite *** thermal degradation temperatures of PLLA/PDLA melt-blown nonwovens increased with the incorporation of SC crystallites,and the maximum rate of decomposition increased to 385.5℃,thus enhancing the thermal *** with neat PLLA melt-blown nonwovens,the hydrophobicity of PLLA/PDLA melt-blown nonwovens was improved,and WCA increased to 139.7°.The SC crystallites were more resistant to degradation by proteinase K compared to neat ***,the degradation rate of PLLA/PDLA melt-blown nonwovens remained at a high *** work provides an effective strategy to obtain high-performance PLLA melt-blown nonwovens.

关键词： PLLA PDLA Melt-blown nonwovens Stereocomplex crystallites Thermal stability Enzymatic degradation

Phonon-mediated superconductivity in orthorhombic XS(X=Nb,Ta or W)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2025年第2期34卷 419-423页

作者： Guo-Hua Liu Kai-Yue Jiang Yi Wan Shu-Xiang Qiao Jin-Han tan Na Jiao Ping Zhang hong-Yan Lu School of Physics and Physical Engineering Qufu Normal UniversityQufu 273165China Institute of Applied Physics and Computational Mathematics Beijing 100088China

The unique three-dimensional orthorhombic NbS(o-NbS)compound synthesized in 1969 has recently been experimentally confirmed to be a superconductor[***.B 108174517(2023)].However,there is currently no theoretical research on its superconducting *** this work,we investigate the superconducting properties of o-Nb S from first-principles *** on the Eliashberg equation,it is found that the superconductivity mainly originates from the coupling between the electrons of Nb-4d orbitals and the vibrations of Nb atoms in the low-frequency region and those of S atoms in the high-frequency region.A superconducting transition temperature(T_c)of 10.7 K is obtained,which is close to the experimental value and higher than most transition metal chalcogenides(TMCs).The calculated thermodynamic properties in the superconducting state,such as specific heat,energy gap,isotope coefficient,etc.,also indicate that o-NbS is a conventional phonon-mediated *** results are consistent with recent experimental reports and provide a good understanding of the superconducting mechanism of o-Nb ***,the TMCs of o-TaS and o-WS are also investigated;these belong to the same and neighboring groups of Nb,and we find that o-TaS and o-WS are also phonon-mediated superconductors with T_c of 8.9 K and 7.2 K,respectively.

关键词： first-principles calculations phonon-mediated superconductivity orthorhombic transition metal chalcogenides

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国乡村产业韧性的统计测度与时空演进

统计与决策 2025年第1期41卷 64-69页

作者：洪名勇谭宇航王涵贵州大学经济学院贵阳550025

乡村产业发展面临内外部双重冲击,增强乡村产业韧性、推动乡村产业可持续发展成为乡村振兴战略中的重大课题。文章通过阐释乡村产业韧性的理论内涵,构建了乡村产业韧性综合评价指标体系;在此基础上,利用2008—2020年的省级面板数据测算... 详细信息

乡村产业发展面临内外部双重冲击,增强乡村产业韧性、推动乡村产业可持续发展成为乡村振兴战略中的重大课题。文章通过阐释乡村产业韧性的理论内涵,构建了乡村产业韧性综合评价指标体系;在此基础上,利用2008—2020年的省级面板数据测算了中国30个省份的乡村产业韧性,并运用核密度估计、Moran’sⅠ、Dagum基尼系数探讨了中国乡村产业韧性的时空演进特征及区域差异来源。研究发现:(1)2008—2020年,全国及三大地区的乡村产业韧性呈波动上升趋势,且东部地区的乡村产业韧性最高。(2)中国乡村产业韧性的空间分布格局相对稳定,总体呈现“东强西弱”的空间分布模式。(3)中国乡村产业韧性的空间集聚模式以“高-低”或“低-高”集聚为主。(4)中国乡村产业韧性的总体差异呈扩大趋势,区域间差异对总体差异的贡献率最大,区域内差异次之,超变密度的贡献率最小。

关键词：乡村产业韧性时空演进区域差异核密度估计 Dagum基尼系数

同方期刊数据库博看期刊

Relational characteristics and dynamics between high-tech firms in the Pearl River Delta and the empowerment for technological innovation by hong Kong

在线全文

学校读者我要写书评

暂无评论

Journal of Geographical Sciences 2025年第2期35卷 382-408页

作者： XU Jili Anthony G.O.yeh George C.S.LIN LIU Xingjian YANG Fan Fiona LUO Zixin Guangzhou Institute of Geography Guangdong Academy of Sciences Department of Urban Planning and Design The University of Hong Kong Department of Geography The University of Hong Kong School of Geography and Planning Sun Yat-Sen University

The perfection of the cross-border regional innovation system of the Pearl River Delta(PRD) and hong Kong remarkably underpins the construction of the Guangdong-hong Kong-Macao Greater Bay Area(GBA) towards an international technological innovation *** paper focuses on the relational characteristics of the usage of technological innovation functions and elements, including labor force, technology, and producer services from hong Kong by high-technology firms in the PRD, and probes into the influencing factors by integrating the objective perspective on the impact of firm-level socioeconomic attributes and subjective perspective on the open interpretations on the reasons by using or not using technological innovation functions and elements from hong Kong by various stakeholders in high-technology domains in the PRD. Key research findings are fourfold. First, hong Kong's technological innovation functions primarily ride on its institutional advantages under the “One Country, Two Systems” framework to empower high-technology firms in the PRD by expanding their international market, international business operation, and financing, but cross-border investment and entrepreneurship has retrieved to a relatively marginalized position. The degree of supply-demand relations of producer services is the highest, followed by labor force and ***, hong Kong-invested, large-sized, and long-standing high-technology firms in the PRD are more inclined to use technological innovation elements from hong Kong, while domestic,small-and-medium-sized, and start-up high-technology firms in the PRD are in turn, gradually unhooked from the supply of technological innovation elements from hong Kong. Third, hong Kong enjoys both advantages and disadvantages in supplying labor forces, technologies, and producer services to high-technology firms in the PRD, with advantages in competitiveness,international linkages and visions, and disadvantages in high cost, lack of more profoun

关键词：