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薄膜铌酸锂切趾啁啾光栅研究

光子学报 2024年第8期53卷 80-90页

作者：隆嘉轩吴侃蔡明璐张栩嘉陈建平上海交通大学区域光纤通信网与新型光通信系统国家重点实验室上海200240

本文研究了基于薄膜铌酸锂的啁啾光栅性能,采用仿真分析的方法,研究了不同设计参数下,三种光栅切趾方式对称线性切趾、非对称线性切趾和高斯切趾在反射带宽和群延迟色散上的差异。通过最优化设计,在高斯切趾的啁啾光栅下,实现了3 dB带宽... 详细信息

本文研究了基于薄膜铌酸锂的啁啾光栅性能,采用仿真分析的方法,研究了不同设计参数下,三种光栅切趾方式对称线性切趾、非对称线性切趾和高斯切趾在反射带宽和群延迟色散上的差异。通过最优化设计,在高斯切趾的啁啾光栅下,实现了3 dB带宽21.2 nm、群延迟色散值0.1385 ps/nm的啁啾光栅。本工作将为实现薄膜铌酸锂片上色散补偿和光信号处理奠定基础。

关键词：啁啾光栅切趾绝缘体上铌酸锂色散补偿群延迟

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薄膜铌酸锂多尖端端面耦合结构

光学学报 2024年第11期44卷 115-122页

作者：王嘉毅蔡明璐李天怡张栩嘉陈建平吴侃上海交通大学电子信息与电气工程学院上海先进通信与数据科学研究院区域光纤通信网与新型光通信系统国家重点实验室上海200240

为提升薄膜铌酸锂芯片端面耦合的效率和稳定性,结合铌酸锂材料的刻蚀特点和工艺条件,设计并研究双层多尖端逆锥形的耦合结构。通过仿真计算、参数扫描和对比分析,探究双尖端和三尖端逆锥形耦合结构的特性及其参数选取方案。多尖端设计... 详细信息

为提升薄膜铌酸锂芯片端面耦合的效率和稳定性,结合铌酸锂材料的刻蚀特点和工艺条件,设计并研究双层多尖端逆锥形的耦合结构。通过仿真计算、参数扫描和对比分析,探究双尖端和三尖端逆锥形耦合结构的特性及其参数选取方案。多尖端设计可扩大端面处的模场,从而降低对加工精度的要求。在侧壁倾角62°和最小宽度150 nm的工艺条件下,理想的双尖端和三尖端结构分别在1550 nm波长处实现0.47 dB和1.04 dB的单端耦合损耗,且具有较大的工作带宽和对准容差。最后,结合多尖端耦合结构的制造和测试结果,分析薄膜铌酸锂芯片上端面耦合结构的优化方案,为进一步实现低损耗耦合结构奠定基础。

关键词：集成光学端面耦合逆锥形结构薄膜铌酸锂光子集成

黑龙江省森林碳汇及其经济价值的变化分析与潜力预测

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生态学杂志 2024年第1期43卷 197-205页

作者：徐思若成志影那雪迎张栩嘉马大龙张鹏哈尔滨师范大学地理科学学院哈尔滨150025

碳中和愿景下,量化森林碳汇有利于制定森林碳战略和碳交易机制,提升应对气候变化的抗御力,对守卫国家生态安全、实现碳中和目标和减缓全球变暖具有重要意义。本文基于国家森林清查数据,利用生物量转换因子连续函数法和碳税法,分析黑龙江... 详细信息

碳中和愿景下,量化森林碳汇有利于制定森林碳战略和碳交易机制,提升应对气候变化的抗御力,对守卫国家生态安全、实现碳中和目标和减缓全球变暖具有重要意义。本文基于国家森林清查数据,利用生物量转换因子连续函数法和碳税法,分析黑龙江省1999—2018年森林碳储量、碳汇量及其经济价值的变化趋势,并结合GM(1,1)模型对黑龙江省乔木林的碳储量进行预测,从而得到碳达峰目标年的碳汇量和碳汇经济价值的预估值。结果表明:黑龙江森林碳储量由1999—2003年6.96×10^(11)kg增至2014—2018年的9.14×10^(11)kg。其中乔木林碳储量占黑龙江省森林碳储量的99.51%~99.65%;1999—2018年黑龙江省乔木林的碳汇量整体呈上升趋势,由2004—2008年的1.68×10^(10)kg·a^(-1)增至2014—2018年的1.76×10^(10)kg·a^(-1),碳汇经济价值受汇率的变化呈下降趋势,由2004—2008年的2.06×10^(9)元·a^(-1)降至2014—2018年的1.66×10^(9)元·a^(-1);在研究期内,各龄组中成熟林的平均碳汇量最大,阔叶混交林是森林碳汇的主要贡献者,占乔木林总碳汇量的93.93%,随植树造林力度的增强,人工林的碳汇量占总碳汇量的比重增大;预测到2030年黑龙江省乔木林碳汇量和碳汇经济价值分别为1.80×10^(10)kg·a^(-1)和1.89×10^(9)元·a^(-1)。

关键词：黑龙江省碳储量碳汇量碳汇经济价值

体育强国建设背景下应用型本科高校教学改革研究

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大学（教学与教育） 2024年第2期 45-48页

作者：张旭嘉谷健西北农林科技大学体育部陕西杨凌712100

体育课程在高校教育中至关重要,既能提升学生身体素质,也能促进体育强国的建设。在体育强国建设背景下,应用型本科高校需要加强体育教学,以培养学生的体育意识,通过教学改革,完善各项体育设施、制度等方式对教学方法进行创新。从现实来... 详细信息

体育课程在高校教育中至关重要,既能提升学生身体素质,也能促进体育强国的建设。在体育强国建设背景下,应用型本科高校需要加强体育教学,以培养学生的体育意识,通过教学改革,完善各项体育设施、制度等方式对教学方法进行创新。从现实来看,当前应用型本科高校在体育改革方面有着诸多问题,课程与教材较为单一、教学训练过于传统、教师专业素养存在明显不足等,这些都会影响高校体育改革的效果。因此,推进应用型本科高校教学改革,对于体育强国建设有着十分重要的现实意义。针对当前应用型本科高校教学改革现状,文章采用了文献研究法、网络调查法进行研究,提出需要结合体育强国的背景,丰富教材内容以及课程形式、创新教学训练、培养更加优质的教师团队等,从更加全面的角度推动应用型本科高校体育教学改革的发展。

关键词：体育强国应用型本科体育改革

Spatio-temporal Evolution Characteristics and Driving Mechanism of the New Infrastructure Construction Development Potential in China

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Chinese Geographical Science 2021年第4期31卷 646-658页

作者： GU Tianshi zhang Peng zhang xujia College of Geography Science of Harbin Normal University Harbin 150025China

With the advent of the era of big data and artificial intelligence, new infrastructure construction(NIC) has attracted the attention of many countries. The development of NIC provides an opportunity to bridge the digital divide and narrow the regional gap,providing continuous impetus to further promote economic development. Here, we considered 31 provincial-level administrative units in China(not including Hong Kong, Macao, and Taiwan of China due to data unavailable) and established comprehensive evaluation indicators for the development potential of NIC. Afterward, we used the entropy-weight TOPSIS model to determine the development potential of NIC and analyze its spatio-temporal evolution characteristics. Furthermore, the GeoDetector model was applied to explore the driving mechanism of the NIC development potential. The conclusions were as follows: (1) The Chinese NIC development potential is generally low. The eastern China was the region with the highest development potential year by year, while the development potential in the central China was found to be in an accelerating phase. (2) The evolution of the Chinese NIC development potential’s spatial pattern has been characterized by an inland extension and coastal agglomeration. Moreover, we identified a superior development zone, a rising development zone, an inferior development zone, and a declining development zone. (3) The scope of Chinese NIC development potential agglomeration areas has gradually expanded and its degree has gradually deepened. The range of high-value agglomeration in eastern area gradually expanded and its degree gradually deepened. (4) Investment in innovative talents appears as the core factor affecting the Chinese NIC development potential. Whether acting alone or synergistically with other factors, its promoting effect on Chinese NIC development potential is the strongest.

关键词： new infrastructure construction development potential spatio-temporal evolution driving mechanism China

Two-dimensional crystallization and preliminary electron crystallographic result of partially purified Fo from porcine mitochondria

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Chinese Science Bulletin 2002年第4期47卷 323-325页

作者： zhang xujia SUN Jingchuan YANG Hui LI Huilin HUANG Youguo YANG Fuyu Institute of Biophysics Chinese Academy of SciencesBeijing 100101China Life Science Division Berkeley National LaboratoryBerkeleyCA 94720USA

After removal of cytoplasmic sector F1 from submitochondrial particles of F0F1-ATP synthase complex with guanidine hydrochloride, the transmembranc sector F0 was specifically extracted from the stripped membranes in the presence of detergent CHAPS and partially purified. Two-dimensional crystals were produced by the reconstitu-tion of the partially purified F0 into asolectin and microdi-alysis. The obtained crystals are able to diffract to 2 nm. The projection map of the negatively stained crystal shows that the crystal has p4212 symmetry, lattice constant, a = b = 14.4 nm. A unit cell contains four F0 molecules.

关键词： membrane protein proton channel F0 two-dimensional crystal electron microscopy.

Ultrastructural and Extracellular Protein Changes in Cell Suspension Cultures of Populus euphratica Associated with Low Temperature-induced Cold Acclimation

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Forestry Studies in China 2003年第4期5卷 1-7页

作者： Dai Huanqin Lu Cunfu zhang Hui zhang xujia College of Biological Sciences and Biotechnology Beijing Forestry UniversityBeijing 100083P.R.China Institute of Biophysics Chinese Academy of SciencesBeijing 100101P.R.China

Populus euphratica Olive is the only tree species that can grow in the saline land and also survive cold winters in northwest China, and it plays a very important role in stabilizing the vulnerable ecosystem there. A cell suspension culture was initiated from callus derived from plantlets of Populus euphratica. Cold acclimation was induced (LT50 of 17.5 ℃) in cell suspension at 45 ℃ in the dark for 30 days and the freezing tolerance increased from LT50 of 12.5 ℃ in nonacclimated cells to LT50 of 17.5 ℃ in cold-acclimated cells. Microvacuolation, cytoplasmic augmentation and accumulation of starch granules were observed in cells that were cold-acclimated by exposure to low temperatures. Several qualitative and quantitative changes in proteins were noted during cold acclimation. Antibodies to carrot extracellular (apoplastic) 36 kD antifreeze protein did not cross react on immunoelectroblots with extracellular proteins in cell suspension culture medium of Populus euphratica, indicating no common epitopes in the carrot 36 kD antifreeze protein and P. euphratica extracellular proteins. The relationship of these changes to cold acclimation in Populus euphratica cell cultures was discussed.

关键词： freezing tolerance cold acclimation suspension-cultured cells extracellular proteins Populus euphratica

Preservation Effect of Prochloraz-manganese Chloride Complex on Postharvest ‘Shatangju'( Citrus reticulata)Fruits

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Plant Diseases and Pests 2016年第5期7卷 32-35页

作者： Xu Chengxiang Zheng Fuqing Ma Yanping zhang xujia College of Life Sciences Zhaoqing University

[ Objective ] The paper was to solve the weakness of heavy postharvest diseases and non-endurable storage of ＇ Shatangju＇, to improve the preservation effect of ＇ Shatangju＇. [ Method ] Fruits were dipped in different concentrations of procbloraz-manganesc chloride complex solutions. The postharvest weight loss rate, soluble solids content and decay rate of fruits were determined, and the safety of chemical agents was observed and evaluated. [ Result ] Prochloraz-manganese chloride complex had significant preservation effect on postharvest ＇ Shatangju＇ fruits, and the appropriate concentration was 0.15% -0.20% （effective content） ; the decay rates of fruits stored at room temperature for 15, 30, 45, 60 and 90 d were 0, 5%, 〈 10%, 〈 10% and 〈 30% ; there was no specific changes in smell and flavor of non-decayed fruits. [ Conclusion ] Prochloraz-manganese chloride complex solution had significant preservation effect on ＇ Shatangju＇ by inhibiting and reducing the growth and development of pathogenic bacteria, and the effect was much better under refrigeration condition.

关键词： ' Shatangju' Prochloraz-manganese chloride complex Postharvest diseases Preservation

CD36 promotes tubular ferroptosis by regulating the ubiquitination of FSP1 in acute kidney injury

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Genes & Diseases 2024年第1期11卷 449-463页

作者： Yixin Ma Lili Huang Zheng zhang Pengfei Yang Qingsong Chen xujia Zeng Fangyan Tan Chunxia Wang Xiongzhong Ruan Xiaohui Liao Department of Nephrology The Second Affiliated HospitalChongqing Medical UniversityChongqing 400010China Department of Cell Biology and Genetics Chongqing Medical UniversityChongqing 400016China Centre for Nephrology Royal Free and University College Medical SchoolUniversity College LondonRoyal Free CampusRowland Hill StreetLondon NW32PFUnited Kingdom Centre for Lipid Research Key Laboratory of Molecular Biology on Infectious DiseasesMinistry of EducationChongqing Medical UniversityChongqing 400016China Kuanren Laboratory of Translational Lipidology Centre for Lipid ResearchSecond Affiliated Hospital of Chongqing Medical UniversityChongqing 400010China

Reactive oxidative species(ROos)production-driven ferroptosis plays a role in acute kidney injury(Akl).However,its exact molecular mechanism is poorly *** receptor CD36 has important roles in oxidizing lipids,lipid accumulation,metabolic syndrome,and insulin resistance in chronic kidney disease,but its roles remain unexplored in *** present study investigated the role and mechanism of CD36 in regulating proximal tubular cell ferroptosis and *** expression of CD36 was found to be significantly up-regulated in AKI renal tissues and correlated with renal function,which might serve as an independent biomarker for AKl ***,in adult mice subjected to AKl,deletion of CD36(CD36-/-)induced tubular cell Ros accumulation,ferroptosis activation,and renal ***,combining LC-MS/MS,co-IP,and ubiquitination analyses revealed that CD36 could specifically bind to ferroptosis suppressor protein 1(FSP1)and regulate its ubiquitination at sites K16 and K24,leading to FSP1 degradation and progression of ferroptosis in *** present results emphasize a novel mechanism of CD36 in cisplatin-induced *** discovery of the special CD36 roles in promoting ferroptosis and AKI development by regulating the ubiquitination of FSP1 in proximal tubular cells may be potential therapeutic targets for ***,CD36 may play a key role in the progression of ***,targeting CD36 may provide a promising treatment option for AKI.

关键词： Acute kidney injury CD36 Ferroptosis FSP1 Ubiquitin-dependent degradation