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A Novel Image Digital Rights Management Scheme with High-Level Security,Usage Control and Traceability

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Chinese Journal of Electronics 2016年第3期25卷 481-494页

作者： MA Zhaofeng HUANG Jianqing JIANG ming niu xinxin Information Security Center of Beijing University of Posts and Telecommunications Library of Beijing University of Posts and Telecommunications Audio and Video Department the Third Research Institute of China Electronics Technology Group Corporation

Current methods of image protection based on chaos encryption can only provide security in Human visual system(HVS) level, however they can not provide usage control when the image is opened, printed or exported. To solve this problem, we proposed a novel image digital rights management scheme for Confidential image data security based on encryption and watermark(CIDSEW) with high-level security, usage control and traceability, in which we employed full content image encryption for confidentiality of the image to be protected, and we firstly proposed strict and detailed Usage control(UC) scheme for Confidential image data(CIData) usage password-based authentication, opening times, printing and exporting control. And when the CIData need to delivery or export to other users or domain, we proposed the secure export and misused tracing and detect approach, in which before the ciphered CIData is exported, we decrypted the CIData in a plain mode, and simultaneously we embedded user-identity-related and hardware-related information as robust watermark for traceability and responsibility confirmation. Finally, we evaluated the proposed CIDSEW by groups of variant size image data for security and efficiency,a large amount of groups of experiments manifest the proposed CIDSEW is secure, efficient, pervasive and robust for confident image data protection, usage control and misuse tracing.

关键词： Digital rights management Confidential image data security Encryption Watermark Usage control(UC) Traceability

Influences of Long-Term Fertilizer and Tillage Management on Soil Fertility of the North China Plain

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Pedosphere 2011年第6期21卷 813-820页

作者： niu Ling-An HAO Jin-Min ZHANG Bao-Zhong niu xin-Sheng Quzhou Experimental Station China Agricultural University Quzhou 057250 （China）

In the North China Plain, fertilizer management and tillage practices have been changing rapidly during the last three decades; however, the influences of long-term fertilizer applications and tillage systems on fertility of salt-affected soils have not been well understood under a winter wheat (Triticum aestivum L.)-maize (Zea mays L.) annual double cropping system. A field experiment was established in 1985 on a Cambosol at the Quzhou Experimental Station, China Agricultural University, to investigate the responses of soil fertility to fertilizer and tillage practices. The experiment was established as an orthogonal design with nine treatments of different tillage methods and/or fertilizer applications. In October 2001, composite soil samples were collected from the 0–20 and 20–40 cm layers and analyzed for soil fertility indices. The results showed that after 17 years of nitrogen (N) and phosphorous (P) fertilizer and straw applications, soil organic matter (SOM) in the top layer was increased significantly from 7.00 to 9.30–13.14 g kg-1 in the 0–20 cm layer and from 4.00 to 5.48–7.75 g kg-1 in the 20–40 cm layer. Soil total N (TN) was increased significantly from 0.37 and 0.22 to 0.79–1.11 and 0.61–0.73 g N kg-1 in the 0–20 and 20–40 cm layers, respectively, with N fertilizer application; however, there was no apparent effect of straw application on TN content. The amounts of soil total P (TP) and rapidly available P (RP) were increased significantly from 0.60 to 0.67–1.31 g kg-1 in the 0–20 cm layer and from 0.52 to 0.60–0.73 g kg-1 in the 20–40 cm layer with P fertilizer application, but were decreased with combined N and P fertilizer applications. The applications of N and P fertilizers significantly increased the crop yields, but decreased the rapidly available potassium (RK) in the soil. Straw return could only meet part of the crop potassium requirements. Our results also suggested that though some soil fertility parameters were maintained or enhanced unde

关键词： rapidly available K rapidly available P soil organic matter straw return total N

A Study of the Distribution of Apple stem pitting virus in Tissues of Pear Tree Using In Situ Hybridization and In Situ RT-PCR

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Agricultural Sciences in China 2009年第11期8卷 1351-1359页

作者： ZHAO Ying LIU Na niu Jian-xin Horticultural Department Agricultural College Shihezi University Shihezi 832003 P.R. China

To understand the distribution of Apple stem pitting virus （ASPV） in tissues of pear tree and provide directly theorical and technical support for shoot tips detoxication, leaves and shoot tips of Korla pear were used as the materials, cDNA probe for ASPV was synthesized through RT-PCR reaction system using the unradioactive digoxigenin-labeled probe, and the specificity and sensitivity of probe were verified by blot hybridization method. Paraffin slice for in situ PCR and in situ hybridization was made and the location and distribution of ASPV RNA were detected in paraffin slices using in situ reverse transcription polymerase chain reaction, and the important factors which influenced the experiment results were optimized. ASPV mainly distributed in palisade tissue of mesophyll cells, external cortex of the tip, and the corresponding newborn vascular bundles. 20 min was the suitable digestive time for proteinase K. For the better amplication, RT reaction system should be above 0.2 U μL^-1 and 0.4 mmol L^-1 for RNasin and dNTPs respectively, 0.1-1.3 U μ L^-1 SuperScript Ⅱ, 0.6- 0.8 μmol L^-1 primer concentration, and above 0.5 U 100 μL^-1 LA Taq DNA polymerase. The suitable annealing temperature in PCR reaction was 60℃ with 35 cycles. The apical meristem of 0.25 mm was the region of virus-free.

关键词： Korla pear Apple stem pitting virus cDNA probe digoxigenin in situ PCR

Weaknesses and improvements of a remote user authentication scheme using smart cards

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The Journal of China Universities of Posts and Telecommunications 2007年第3期14卷 91-94页

作者： HU Lan-lan niu xin-xin YANG Yi-xian Information Security Center State Key Laboratory of Networking andSwitching Technology Beijing University of Posts and TelecommunicationsBeijing 100876 China

In 2005, Liu et al. proposed an improvement to Chien et al.＇s remote user authentication scheme, using smart cards, to prevent parallel session attack. This article, however, will demonstrate that Liu et al.＇s scheme is vulnerable to masquerading server attack and has the system＇s secret key forward secrecy problem. Therefore, an improved scheme with better security strength, by using counters instead of timestamps, is proposed. The proposed scheme does not only achieve their scheme＇s advantages, but also enhances its security by withstanding the weaknesses just mentioned.

关键词： authentication security smart cards

Cage-like radiotherapy system for noncoplanar radiotherapy

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Nuclear Science and Techniques 2021年第2期32卷 1-10页

作者： Chuan-Meng niu ming-Hui Li Jian-Rong Dai Department of Radiation Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China

The aim of this study was to design a cage-like radiotherapy system(CRTS)to further promote the clinical application of noncoplanar *** CRTS comprises two stands,two O-rings,several arc girders,an X-ray head,an imaging subsystem,and a treatment *** X-ray head rotates with O-rings around the patient’s body and slides along the arc *** with the C-arm linear accelerator(C-Linac),the clinically available spatial irradiation angle ranges(SIARs)of the CRTS for the head,chest,and abdomen were 33%,63.6%,and 62.6%larger,***,according to a preliminary planning comparison based on the dose distribution simulation method,the CRTS achieved much better protection of normal tissue than the ***,the CRTS enabled accurate noncoplanar irradiation without movement of the body being irradiated,allowed automatic control of the movements of different parts without risk of collisions,and provided continuous radiation over an angle that considerably exceeded a full *** advantages make CRTS very promising for noncoplanar radiotherapy.

关键词： Radiotherapy system Noncoplanar radiotherapy Spatial irradiation angle range Spherical surface area

Equitable Vertex Arboricity Conjecture Holds for Graphs with Low Degeneracy

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Acta Mathematica Sinica,English Series 2021年第8期37卷 1293-1302页

作者： xin ZHANG Bei niu Yan LI Bi LI School of Mathematics and Statistics Xidian UniversityXi’an 710071P.R.China

The equitable tree-coloring can formulate a structure decomposition problem on the communication network with some security ***,an equitable tree-Zc-coloring of a graph is a vertex coloring using k distinct colors such that every color class induces a forest and the sizes of any two color classes differ by at most *** this paper,we show some theoretical results on the equitable tree-coloring of graphs by proving that every d-degenerate graph with maximum degree at most Δ is equitably tree-fc-colorable for every integer k≥(Δ+1)/2 provided that Δ≥9.818d,confirming the equitable vertex arboricity conjecture for graphs with low degeneracy.

关键词： Equitable coloring tree-coloring vertex arboricity degeneracy

Influence of the Coulomb exchange term on nuclear single-proton resonances

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Nuclear Science and Techniques 2016年第5期27卷 231-237页

作者： Shu-Yang Wang Zhong-Lai Zhu Zhong-ming niu School of Physics and Materials Science Anhui University

Nuclear single-proton resonances are sensitive to the Coulomb field,while the exchange term of Coulomb field is usually neglected due to its *** combining the complex scaling method with the relativistic mean-field model,the influence of the Coulomb exchange term on the single-proton resonances is investigated by taking Sn isotopes and N=82 isotones as *** is found that the Coulomb exchange term reduces the singleproton resonance energy within the range of 0.4-0.6 MeV and leads to similar isotopic and isotonic trends of the resonance energy as those without the Coulomb exchange ***,the single-proton resonance width is also reduced by the Coulomb exchange term,whose influence generally decreases with the increasing neutron number and increases with the increasing proton ***,the influence of the Coulomb exchange term cannot change the trend of the resonance width with respect to the neutron number and proton ***,the influence of the Coulomb exchange term on the resonance width is investigated for the doubly magic nuclei ^(40)Ca,^(56,78)Ni,^(100,132)Sn,and ^(208)*** is found that the Coulomb exchange term reduces the proton resonance width within 0.2 MeV,whose magnitude depends on the specific nucleus and the quantum numbers of resonant states.

关键词：共振能量库仑场交换项质子数相对论平均场模型共振宽度中子数非定域性

Cold compression deformation method for reducing residual stress and uniformizing micro-property in ferrite steel

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Journal of Iron and Steel Research International 2022年第3期29卷 503-511页

作者： Bo Ning Hui-bin Wu Gang niu xin-pan Yu Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing100083China

To reduce internal residual stress and homogenize micro-property of hot-rolled ferrite steel,the cold compression deformation method with small reduction rate has been performed in the hot-rolled samples,and X-ray diffraction and nanoindentation test have been used to detect the residual stress and *** samples with deformation rate of 0-5.59%or annealing at 550℃ are *** results show that,due to the coupling effect of thermal expansion and cold contraction and the volume expansion of microstructural transformation from austenite to ferrite,compressive residual stress was found inside the hot-rolled *** the increase in cold compression deformation,the dislocation density increased and the microhardness increased gradually,and there is no obvious rule for the change of mean nano-hardness in micro-zone for the center of ***,the uniformity of nano-hardness in the micro-zone increased first and then decreased,and the value of residual stress has obvious corresponding relationship with the uniformity of micro-zone *** cold compression deformation with appropriate reduction rate can reduce residual stress and improve nano-hardness uniformity of the hot-rolled samples,but more deformation(such as reduction rateε=5.59%)makes residual stress increase and makes uniformity of nano-hardness deteriorate.

关键词： Ferrite Cold compression deformation Residual stress Nano-hardness Uniformity Dislocation density

Endoscopic stenting and concurrent chemoradiotherapy for advanced esophageal cancer:A case-control study

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World Journal of Gastroenterology 2012年第12期18卷 1404-1409页

作者： Xiang-Jun Jiang ming-Quan Song Yong-Ning xin Yu-Qiang Gao Zi-Yu niu Zi-Bin Tian Department of Gastroenterology QingdaoMunicipal Hospital affiliated to Qingdao University Qingdao266011 Shandong Province China QingdaoKey Laboratory of Digestive Diseases Qingdao Municipal Hos-pital Qingdao 266011 Shandong Province China Department of Gastroenterology Affiliated Hospitalof Qingdao University Medical College Qingdao 266003 Shan-dong Province China

AIM:To evaluate the role of endoscopic stenting with or without concurrent 3-dimensional conformal chemoradiotherapy (3D-CRT) in patients with inoperable esophageal ***:Advanced esophageal cancer patients indicated for esophagectomy received esophageal stents.A part of patients completed 3D-CRT after *** was assessed by endoscopy and computed tomographic scan before and 4 wk after completion of the *** median survival,3D-CRT toxicity and complications were compared between 3D-CRT and control ***:From 1999 to 2008,99 consecutive patients with T3/T4 disease and unsuitable for esophagectomy were placed with esophageal ***-seven patients received 3D-CRT,while 36 patients treated withendoscopic stents alone were recruited as *** 3D-CRT treatment,the median tumor volume of 3D-CRT patients were reduced significantly from 43.7 ± 10.2 cm 3 to 28.8 ± 8.5 cm 3 (P < 0.05).The complete and partial response rate was 85.1%,and no response was 14.9%.After 3D-CRT,the incidence rate of T2 and T3 disease evident on CT scan increased to 78.4% while T4 decreased from 66.7% to 21.6% (P < 0.05).3DCRT Karnofsky Performance Status improved in 3D-CRT patients compared with the control group (P=0.031).3D-CRT patients had a longer survival than the control group (251.7 d vs 91.1 d,P < 0.05).And the median half-year survival rate in 3D-CRT group (91%) was higher than in the control group (50%,P < 0.05).The most common toxicity was leukocytopenia in the 3D-CRT group (46.7% vs 18.8%,P=0.008).The control group had a higher rate of restenosis than the 3D-CRT group (81.3% vs 9.0%,P < 0.05).The rate of nephrotoxicity was increased in 3D-CRT as compared with the control group (31.3% vs 15.6%,P < 0.05).CONCLUSION:3D-CRT can improve dysphagia in patients with inoperable esophageal carcinoma.3D-CRT combined with stenting results in better survival as compared with endoscopic stents used alone.

关键词： Esophageal Cancer Stents Chemoradiothe-rapy Three-dimensional imaging Case control study