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A Study of Steganographic Image Security

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The Journal of China Universities of Posts and Telecommunications 2001年第3期8卷 81-82页

作者： CHEN ming-qi directed by yang Yi-xian

In this dissertation, sereral key problems in the field of steganographic image security are mainly studied and discussed: (1) A novel kind of image cryptosystem is studied. The encrypted information of secret image is embedded into an ordinary image, which can be transmitted publicly, and it will not cause attention of illegal eavesdropper. The following results are achieved: (a) The image hiding algorithm and its improved algorithm based on wavelet transform and vector quantization are proposed, and both algorithms embed the secret image after taking full advantage of wavelet transform(WT) to compress it. (b) Introducing the CDMA concept in communication theory, a novel kind of image cryptosystem—image hiding cryptosystem of image division multiple access is proposed. We encrypt key information of several secret images and then hide them into an image, which is an ordinary image. After receivers get the image, each receiver can restore corresponding secret image independently. Compared with other image encryption algorithms, our new image hiding cryptosystem can compress secret image data efficiently. Moreover, the security and practicability of our system is better. (2) Digital watermarking is the most important branch of information hiding, which has been the hotspot of international academia. Digital watermarking has been proposed as a solution to the problem of copyright protection of multimedia documents in networked environments. In this field, the following results are achieved: (a) A new frequency information hiding and watermarking algorithm based on WT and Discrete Cosine Transform(DCT) is presented. After compressed by WT, the information of secret image is embedded into DCT domain. The algorithm has good imperceptibility and security and is robust against JPEG compressing and cropping. The algorithm can be used to embed watermark into images, and the watermark may be one 256-color picture or more and more than one secret image can be hidden into a sing

关键词： intelligence security steganographic intelligence steganographic image intellectual property protection

Demonstration of a 4-Sensor Folded Sangac Sensor Array with Active Phase Biasing Scheme

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Journal of Electronic Science and Technology of China 2008年第4期6卷 474-477页

作者： Zhang-qi Song ming-Ye yang Xue-Liang Zhang Yong-ming Hu College of Optoelectronic Science andEngineering National University of Defense Technology Changsha410073 China

A 4-sensor folded Sagnac sensor array with an active phase biasing scheme is presented. The overlapping of the signal and noise pulse is avoided through a time division multiplexing scheme and the noise pulses is eliminated almost completely. The scheme can address 16 sensors when the repeat frequency of input pulse is at 68.3 kHz. The alternative phase bias technique is demonstrated, which can provide sensors with stable phase bias. The future benefit of this technique is that the 1/f noise in the circuit can be suppressed.

关键词： Fiber optic sensor sensor array,Sagnac interferometer time division multiplexing.

OsMas1,a novel maspardin protein gene,confers tolerance to salt and drought stresses by regulating ABA signaling in rice

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Journal of Integrative Agriculture 2023年第2期22卷 341-359页

作者： WANG Fei-bing WAN Chen-zhong NIU Hao-fei qi ming-yang LI Gang ZHANG Fan HU Lai-bao YE Yu-xiu WANG Zun-xin PEI Bao-lei CHEN Xin-hong YUAN Cai-yong School of Life Science and Food Engineering Huaiyin Institute of TechnologyHuai'an 223003P.R.China Huaiyin Institute of Agricultural Sciences of Xuhuai Region Huai'an 223001P.R.China Institute of Botany Jiangsu Province and Chinese Academy of SciencesNanjing 210014P.R.China

Drought and salt stresses,the major environmental abiotic stresses in agriculture worldwide,affect plant growth,crop productivity,and ***,developing crops with higher drought and salt tolerance is highly *** study reported the isolation,biological function,and molecular characterization of a novel maspardin gene,OsMas1,from *** OsMas1 protein was localized to the *** expression levels of OsMas1 were up-regulated under mannitol,PEG6000,NaCl,and abscisic acid(ABA) treatments in *** OsMas1 gene was introduced into the rice cultivar Zhonghua 11(wild type,WT).OsMas1-overexpression(OsMas1-OE) plants exhibited significantly enhanced salt and drought tolerance;in contrast,OsMas1-interference(OsMas1-RNAi) plants exhibited decreased tolerance to salt and drought stresses,compared with ***1-OE plants exhibited enhanced hypersensitivity,while OsMas1-RNAi plants showed less sensitivity to exogenous ABA treatment at both germination and post-germination ***,proline and K+ contents and superoxide dismutase(SOD),catalase(CAT),peroxidase(POD),and photosynthesis activities were significantly *** contrast,malonaldehyde(MDA),hydrogen peroxide(H2O2),superoxide anion radical(O2-··),and Na+ contents were significantly decreased in OsMas1-OE plants compared with OsMas1-RNAi and WT *** of OsMas1 up-regulated the genes involved in ABA signaling,proline biosynthesis,reactive oxygen species(ROS)-scavenging system,photosynthesis,and ion transport under salt and drought *** results indicate that the OsMas1 gene improves salt and drought tolerance in rice,which may serve as a candidate gene for enhancing crop resistance to abiotic stresses.

关键词： ABA signaling OsMas1 gene rice salt and drought tolerance

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面向关系-事务数据的数据匿名方法

软件学报 2016年第11期27卷 2828-2842页

作者：龚奇源杨明罗军舟东南大学计算机科学与工程学院江苏南京211189

在发布同时包含关系和事务属性的数据(简称为关系-事务数据)时,由于关系数据和事务数据均有可能受到链接攻击,需要同时匿名这两部分的数据.现有的数据匿名技术在匿名化关系-事务数据时会造成严重的数据缺损,无法保障数据可用性.针对此问... 详细信息

在发布同时包含关系和事务属性的数据(简称为关系-事务数据)时,由于关系数据和事务数据均有可能受到链接攻击,需要同时匿名这两部分的数据.现有的数据匿名技术在匿名化关系-事务数据时会造成严重的数据缺损,无法保障数据可用性.针对此问题,提出了(k,l)-多样化模型,通过等价类上的l-多样化约束和事务数据上的k-匿名约束来保证用户隐私不被泄露.在此基础上,设计并实现了APA和PAA两种满足该模型的匿名算法,以不同的顺序对关系-事务数据进行匿名,并提出了相应的数据缺损评估方法.实际公开数据集上的实验结果表明,与现有的数据匿名技术相比,APA和PAA能够在保护用户隐私的前提下,以更低的数据缺损和更高的效率完成对关系-事务数据的匿名.

关键词：数据匿名隐私泄露 k-匿名 l-多样化关系-事务数据

结肠癌组织CBX7表达及其对SW480细胞侵袭影响机制探讨

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中华肿瘤防治杂志 2017年第17期24卷 1201-1205页

作者：罗琪明杨向东西南医科大学中西医结合学院四川泸州646000 四川省射洪县中医院肛肠科四川射洪629200 成都肛肠专科医院肛肠科四川成都610000

目的染色盒同源物7(chromobox homolog 7,CBX7)是黑腹果蝇的异染色质蛋白在人类细胞中的同源物,主要分布于细胞核的染色质中,通过与染色质的结合而发挥其调节功能。本研究探讨CBX7在人结肠癌中的表达及其对结肠癌SW480细胞上皮细胞间质... 详细信息

目的染色盒同源物7(chromobox homolog 7,CBX7)是黑腹果蝇的异染色质蛋白在人类细胞中的同源物,主要分布于细胞核的染色质中,通过与染色质的结合而发挥其调节功能。本研究探讨CBX7在人结肠癌中的表达及其对结肠癌SW480细胞上皮细胞间质化(epithelial-mesenchymal transition,EMT)及细胞侵袭能力的影响。方法收集成都肛肠专科医院2014-01-01-2015-01-01行手术切除的48例结肠癌组织及对应癌旁组织(距离组织边缘>2cm),免疫组化检测CBX7蛋白表达,采用卡方χ2检验分析结肠癌组织中CBX7蛋白表达与临床特征的关系。通过重组质粒在SW480细胞中过表达CBX7,Transwell侵袭小室检测过表达CBX7后SW480细胞侵袭能力的变化;检测过表达CBX7后SW480细胞内E-cadherin、N-cadherin和Vimentin的表达改变。结果结肠癌组织中CBX7蛋白的表达量为1.13±0.44,显著低于癌旁组织的3.43±0.37,差异有统计学意义,t=3.874,P<0.001。过表达CBX7后采用Transwell侵袭小室检测发现CBX7组侵袭细胞数量为25.324±5.157,较对照组的50.208±7.071减少,差异有统计学意义,t=10.336,P<0.001。CBX7过表达质粒转染后SW480细胞内上皮标志物E-cadherin的表达量为0.79±0.12,高于转染前的0.21±0.10,差异有统计学意义,t=11.365,P<0.001。转染后N-cadherin和Vimentin的表达量分别为0.37±0.05和0.22±0.03,较转染前的0.75±0.09和0.35±0.04下调,差异均有统计学意义,均P值<0.001。结论结肠癌组织CBX7表达下调,过表达CBX7通过抑制SW480细胞上皮细胞间质化改变而抑制结肠癌细胞侵袭。

关键词： CBX7 结肠癌上皮细胞间质化侵袭

PPAR-γ agonists from the Aerial Parts of Scoparia dulcis

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PPAR-γ agonists from the Aerial Parts of Scoparia dulcis

支持电解质和离子强度对溶液中配合物稳定性的影响——Ⅱ.中性离子对CuSO4和配阴离子Fe(Tiron)-的稳定性

第十四届全国中药和天然药物学术研讨会

作者： qing Liu qi-ming yang Hai-Jun Hu Li yang Ying-Bo yang Gui-Xin Chou Zheng-Tao Wang Shanghai University of Traditional Chinese Medicine Shanghai R&D Center for Standardization of Chinese Medicines China Pharmaceutical University

＜正＞PPAR-γis a member of the nuclear hormone receptor superfamily that can be activated by many kinds of *** activation results in increased insulin sensitivity partly by reversing lipotoxicity-induced insulin ***,...

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化学学报 1985年第2期43卷 126-133页

作者：刘祁涛杨鸣辽宁大学化学系沈阳

本文用分光光度法测定了离子强度为0.2至4.2范围内的离子对CuSO和配阴离子Fe(Tiron)在各种支持电解质中的稳定性.在各种支持电解质中,两个配合物体系的稳定性随离子强度变化的趋势基本一致,但稳定性的极小值位置则大不相同.稳定性数据表... 详细信息

本文用分光光度法测定了离子强度为0.2至4.2范围内的离子对CuSO和配阴离子Fe(Tiron)在各种支持电解质中的稳定性.在各种支持电解质中,两个配合物体系的稳定性随离子强度变化的趋势基本一致,但稳定性的极小值位置则大不相同.稳定性数据表明,提出的单参数的Debye-Hückel方程对CuSO体系在离子强度小于2.0时适用;对Fe(Tiron)体系则完全不能应用.本文简单地讨论了造成上述情况的原因.测得CuSO和Fe(Tiron)在25℃时的热力学稳定常数logK分别为2.17和19.50.

关键词：酸离解常数电解质传导材料离子强度 CuSO4 Tiron 配合物配阴离子 Fe

Neuroprotective effects of Hydroxysafflor yellow A against apoptosis through down-regulation of NR2B-containing NMDA receptors

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Neuroprotective effects of Hydroxysafflor yellow A against a...

Multilevel analysis of the central-peripheral-target organ pathway:contributing to recovery after peripheral nerve injury

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： qi yang,ming-Gao ZHAO~* Department of Pharmacology,School of Pharmacy Fourth Military Medical University,Xi’an 710032,China

＜正＞Hydroxysafflor yallow A（HSYA） is a component of the flower Carthamus tinctorius *** has been shown neuroprotective effects in vivo and in ***,little is known about HSYA on the neuronal apoptosis induced by the glutamate,the principal excitatory neurotransmitter in the *** present study was undertaken to investigate its anti-apoptotic activities and the mechanisms underlying the neuroprotective *** we report that HSYA significantly attenuated,in a concentration-dependent manner,apoptotic cell damage induced by exposure of cultured cortical neurons to NMDA（100μM） for 30 *** blot analysis revealed that HSYA significantly reversed NR2B upregulation induced by exposure to NMDA,while it did not affect the expression of NR2A *** results demonstrate that HSYA takes neuroprotective effects through inhibiting the action of NR2B-containing NMDA receptors.

关键词： Hydroxysafflor yellow A apoptosis NMDA receptor Neuron

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Neural Regeneration Research 2025年第10期20卷 2807-2822页

作者： Xizi Song Ruixin Li Xiaolei Chu qi Li Ruihua Li qingwen Li Kai-Yu Tong Xiaosong Gu Dong ming Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjinChina Haihe Laboratory of Brain-Machine Interface and Human-Machine Fusion TianjinChina Department of Rehabilitation Tianjin University Tianjin HospitalTianjinChina Department of Hand Microsurgery Tianjin University Tianjin HospitalTianjinChina School of Exercise and Health Tianjin University of SportTianjinChina Department of Biomedical Engineering the Chinese University of Hong KongHong Kong Special Administrative RegionChina

Peripheral nerve injury is a common neurological condition that often leads to severe functional limitations and *** on the pathogenesis of peripheral nerve injury has focused on pathological changes at individual injury sites,neglecting multilevel pathological analysis of the overall nervous system and target *** has led to restrictions on current therapeutic *** this paper,we first summarize the potential mechanisms of peripheral nerve injury from a holistic perspective,covering the central nervous system,peripheral nervous system,and target *** peripheral nerve injury,the cortical plasticity of the brain is altered due to damage to and regeneration of peripheral nerves;changes such as neuronal apoptosis and axonal demyelination occur in the spinal *** nerve will undergo axonal regeneration,activation of Schwann cells,inflammatory response,and vascular system regeneration at the injury *** damage to target organs can occur,including skeletal muscle atrophy and sensory receptor *** then provide a brief review of the research advances in therapeutic approaches to peripheral nerve *** main current treatments are conducted passively and include physical factor rehabilitation,pharmacological treatments,cell-based therapies,and physical ***,most treatments only partially address the problem and cannot complete the systematic recovery of the entire central nervous system-peripheral nervous system-target organ ***,we should further explore multilevel treatment options that produce effective,long-lasting results,perhaps requiring a combination of passive(traditional)and active(novel)treatment methods to stimulate rehabilitation at the central-peripheral-target organ levels to achieve better functional recovery.

关键词： central nervous system central peripheral target organ multilevel pathological analysis nerve regeneration peripheral nerve injury peripheral nervous system target organs therapeutic approach