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中国股市与股指期市的对冲表现及市场非完备性

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系统工程理论与实践 2013年第11期33卷 2734-2745页

作者：陈强郑旭林小强上海交通大学安泰经济与管理学院上海200030

基于理论模型和数据实证两个角度考察了在市场非完备条件下,我国股票市场与股指期市的对冲表现.在理论上,建立了市场非完备性与市场微观噪声及考虑噪声的对冲效果之间的关系.在实证上,首先提出了一种基于非参数估计的分析方法,然后利用... 详细信息

基于理论模型和数据实证两个角度考察了在市场非完备条件下,我国股票市场与股指期市的对冲表现.在理论上,建立了市场非完备性与市场微观噪声及考虑噪声的对冲效果之间的关系.在实证上,首先提出了一种基于非参数估计的分析方法,然后利用5分钟高频数据验证了模型假设的合理性及模型结论的正确性.理论与实证都表明当一个市场非完备性程度越高时,利用股指期货对冲股市风险就越应考虑市场微观噪声的影响.实证结果还表明我国股票市场和股指期货市场间存在较高的非完备性.不过,随着时间的推移,市场的非完备性存在减小的趋势.

关键词：股指期货对冲表现市场非完备性微观结构噪声

Nucleus-targeting orange-emissive carbon dots delivery adriamycin for enhanced anti-liver cancer therapy

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Chinese Chemical Letters 2024年第6期35卷 421-426页

作者： qiang Li Jiangbo Fan Hongkai Mu lin Chen Yongzhen Yang Shiping Yu The Second Hospital of Shanxi Medical University Taiyuan 030001China Shanxi Medical University Taiyuan 030001China Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030032China

Carbon dots(CDs)with precise targeting function show great potential in the field of drug delivery *** this study,the functionalized nucleus-targeting orange-emissive CDs with nuclear localization sequence(NLS)were loaded with adriamycin(DOX)to obtain a nucleus-targeting orange-emissive CDs drug delivery system(CDs-NLS-DOX),which delivered DOX to tumor cell nuclei to enhance its anti-tumor *** drug carrier orange-emissive CDs showed excitation-independent behavior,stable and enhanced imaging capability and good biocompatibility in vitro and in ***,the CDs-NLS could target the nuclei efficiently,and the CDs-NLS-DOX complexes had a high drug loading rate(59.4%)after loading DOX,exhibiting p H-dependent DOX release behavior through breaking acylhydrazone bond in a weak acidic *** addition,the CDs-NLS-DOX complexes exhibited an enhanced killing activity against human hepatoma cells(HepG2).The in vivo therapeutic effects on HepG2 nude mice transplanted tumors indicated the CDs-NLS-DOX had a stronger ability to inhibit tumor growth compared to free *** short,CDs-NLS-DOX is expected to be a precise and efficient nucleus-targeting nano-drug delivery system for tumor treatment.

关键词： Carbon dots Nucleus-targeting Adriamycin Drug delivery system Liver cancer therapy

Parallel Algorithm in Surface Wave Waveform Inversion

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Wuhan University Journal of Natural Sciences 2001年第Z1期6卷 574-578页

作者： Cao Xiao lin, Song Jun qiang School of Computer Science, National University of Defense Technology, Changsha 410073, China School of Computer Science National University of Defense Technology Changsha China

In Surface wave waveform inversion, we want to reconstruct 3D shear wave velocity structure, which calculation beyond the capability of the powerful present day personal computer or even workstation. So we designed a high paralleled algorithm and carried out the inversion on Parallel computer based on the partitioned waveform inversion (PWI). It partitions the large scale optimization problem into a number of independent small scale problems and reduces the computational effort by several orders of magnitude. We adopted surface waveform inversion with a equal block(2 o×2 o) discretization.

关键词： surface wave waveform inversion parallel algorithm partitioned waveform inversion

PREPARATION OF ENANTIOMERICALLY PURE SYN-4,5-DIHYDROXY CARBOXYLIC ACID LACTONES BY MICROBIAL REDUCTION

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Chinese Chemical Letters 1991年第5期2卷 345-346页

作者： Jian Xin GU Zu Yi LI GUo qiang lin Shanghai Institute of Organic Chemistry Academia Sinica 345 Lingling LuShanghai 200032

Enantiomerically pure syn-4,5-dihydroxy carboxylic acid lactones were prepared by microbial reduction of acyl lactones with resting cell of Aspergillus niger.

关键词： SYN PREPARATION OF ENANTIOMERICALLY PURE SYN-4,5-DIHYDROXY CARBOXYLIC ACID LACTONES BY MICROBIAL REDUCTION ACID

In situ aminolysis of 1,2-epoxy-penten-3-ol

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Chinese Journal of Chemistry 1991年第4期9卷 381-384页

作者： lin,Guo-qiang ZENG,Chun-Min Shanghai Institute of Organic Chemistry,Academia Sinica,Shanghai 200032 Shanghai Institute of Organic Chemistry Academia Sinica Shanghai 200032

In situaminolysis of oxirane prepared from divinylacrbinol(1)via Sharpless asymmetric epoxidation was described where Ⅰ° and Ⅱ° amines were employed as nucleophiles.

关键词： Za

Transcriptome profiling of the developing postnatal mouse testis using next-generation sequencing

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Science China(Life Sciences) 2013年第1期56卷 1-12页

作者： GONG Wei PAN linlin lin qiang ZHOU YuanYuan XIN ChengQi YU XiaoMin CUI Peng HU SongNian YU Jun CAS Key Laboratory of Genome Sciences and Information Beijing Institute of GenomicsChinese Academy of Sciences Graduate University of Chinese Academy of Sciences

Mammalian testis development is a complex and highly sophisticated process. To study the dynamic change of normal testis development at the transcriptional level, we investigated mouse testes at three postnatal ages: 6 days postnatal, 4 weeks old, and 10 weeks old, representing infant (PN1), juvenile (PN2), and adult (PN3) stages, respectively. Using ultra high-throughput RNA sequencing (RNA-seq) technology, we obtained 211 million reads with a length of 35 bp. We identified 18837 genes that were expressed in mouse testes, and found that genes expressed at the highest level were involved in spermatogenesis. The gene expression pattern in PN1 was distinct from that in PN2 and PN3, which indicates that spermatogenesis has commenced in PN2. We analyzed a large number of genes related to spermatogenesis and somatic development of the testis, which play important roles at different developmental stages. We also found that the MAPK, Hedgehog, and Wnt signaling pathways were significantly involved at different developmental stages. These findings further our understanding of the molecular mechanisms that regulate testis development. Our study also demonstrates significant advantages of RNA-seq technology for studying transcriptome during development.

关键词： next-generation sequencing transcriptome mouse testis development

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纳米酶在农业方向的研究进展

仲恺农业工程学院学报 2024年第1期37卷 67-73页

作者：马宝福付小哲林强牛银杰罗霞梁红茹李宁求中国水产科学研究院珠江水产研究所广东广州510380 农业农村部渔用药物创制重点实验室广东广州510380 广东省水产动物免疫与绿色养殖重点实验室广东广州510380

纳米酶作为一种具有类酶活性的新型纳米材料,在抗逆改良、食品检测、食品加工与保鲜、植物保护和种子处理等方向具有广泛的应用前景.文章对纳米酶的定义、分类及其在农业方向的应用进行了综述,对目前存在的问题进行了探讨,并对其未来的... 详细信息

纳米酶作为一种具有类酶活性的新型纳米材料,在抗逆改良、食品检测、食品加工与保鲜、植物保护和种子处理等方向具有广泛的应用前景.文章对纳米酶的定义、分类及其在农业方向的应用进行了综述,对目前存在的问题进行了探讨,并对其未来的发展方向进行了展望.

关键词：农业食品纳米酶

A Lens Assisted Phase Microscope Based on Ptychography

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Chinese Physics Letters 2012年第8期29卷 143-145页

作者： PAN Xing-Chen lin qiang LIU Cheng ZHU Jian-qiang Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800

Based on the recently developed ptychographical iterative engine(PIE),we suggest a lens assisted microscopy to realize quantitative phase imaging without using *** sample is imaged with a lens system;a pinhole on the image plane scans the image at a proper step interval;the diffraction pattern is recorded simultaneously by a CCD at Fresnel *** a slightly changed PIE algorithm,the phase image of the sample can be accurately reconstructed from the recorded diffraction *** main advantage of this suggested method lies in its capability to retrieve the phase information from the recorded intensity directly,and thus it has more flexibility over conventional interferometric *** feasibility of the suggested method is verified by reconstructing the modulus and phase image of a biological sample from a set of 10 by 10 diffraction patterns,and the result matches the analysis well.

关键词： record image slightly

CAGCN:Centrality-Aware Graph Convolution Network for Anomaly Detection in Industrial Control Systems

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Journal of Computer Science & Technology 2024年第4期39卷 967-983页

作者： Jun Yang Yi-qiang Sheng Jin-lin Wang Hong Ni National Network New Media Engineering Research Center Institute of AcousticsChinese Academy of SciencesBeijing 100190China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

In industrial control systems,the utilization of deep learning based methods achieves improvements for anomaly ***,most current methods ignore the association of inner components in industrial control *** industrial control systems,an anomaly component may affect the neighboring components;therefore,the connective relationship can help us to detect anomalies *** this paper,we propose a centrality-aware graph convolution network(CAGCN)for anomaly detection in industrial control *** the traditional graph convolution network(GCN)model,we utilize the concept of centrality to enhance the ability of graph convolution networks to deal with the inner relationship in industrial control *** experiments show that compared with GCN,our CAGCN has a better ability to utilize this relationship between components in industrial control *** performances of the model are evaluated on the Secure Water Treatment(SWaT)dataset and the Water Distribution(WADI)dataset,the two most common industrial control systems datasets in the field of industrial anomaly *** experimental results show that our CAGCN achieves better results on precision,recall,and F1 score than the state-of-the-art methods.

关键词： graph convolution network(GCN) data mining network centrality anomaly detection industrial control system