This paper proved the statement that a good linear block encoder is in fact a good local-random sequence generator. Furthermore, this statement discovers the deep relationship between the error-correcting coding theor...This paper proved the statement that a good linear block encoder is in fact a good local-random sequence generator. Furthermore, this statement discovers the deep relationship between the error-correcting coding theory and the modern cryptography.展开更多
Stereolithographic(STL)files have been extensively used in rapid prototyping industries as well as many other fields as watermarking algorithms to secure intellectual property and protect three-dimensional models from...Stereolithographic(STL)files have been extensively used in rapid prototyping industries as well as many other fields as watermarking algorithms to secure intellectual property and protect three-dimensional models from theft.However,to the best of our knowledge,few studies have looked at how watermarking can resist attacks that involve vertex-reordering.Here,we present a lossless and robust watermarking scheme for STL files to protect against vertexreordering attacks.Specifically,we designed a novel error-correcting code(ECC)that can correct the error of any one-bit in a bitstream by inserting several check digits.In addition,ECC is designed to make use of redundant information according to the characteristics of STL files,which introduces further robustness for defense against attacks.No modifications are made to the geometric information of the three-dimensional model,which respects the requirements of a highprecision model.The experimental results show that the proposed watermarking scheme can survive numerous kinds of attack,including rotation,scaling and translation(RST),facet reordering,and vertex-reordering attacks.展开更多
Quantum secret sharing（QSS） is a procedure of sharing classical information or quantum information by using quantum states. This paper presents how to use a [2k- 1, 1, k] quantum error-correcting code （QECC） to im...Quantum secret sharing（QSS） is a procedure of sharing classical information or quantum information by using quantum states. This paper presents how to use a [2k- 1, 1, k] quantum error-correcting code （QECC） to implement a quantum （k, 2k-1） threshold scheme. It also takes advantage of classical enhancement of the [2k-1, 1, k] QECC to establish a QSS scheme which can share classical information and quantum information simultaneously. Because information is encoded into QECC, these schemes can prevent intercept-resend attacks and be implemented on some noisy channels.展开更多
目的分析某专科医院在疾病诊断相关组(diagnosis related groups,DRGs)结算模式下存在的未入组病例问题,并提出相应的改进措施。方法通过回顾性分析和专家讨论,选取并总结某专科医院2021年1月—2022年6月上传至市医保平台病例信息管理...目的分析某专科医院在疾病诊断相关组(diagnosis related groups,DRGs)结算模式下存在的未入组病例问题,并提出相应的改进措施。方法通过回顾性分析和专家讨论,选取并总结某专科医院2021年1月—2022年6月上传至市医保平台病例信息管理系统中病例33935例中未入组病例300例,并对所有的未入组病例进行深入分析。结果未入组病例原因主要为主要诊断编码或者手术编码为灰码、医保版本切换导致原本入组的有效主诊断变成无效主诊断、主要诊断编码国家临床版医保版没有做好对照和临床医师主要诊断选择错误等方面。结论通过对医院DRGs结算模式下未入组病例的全面分析,找到改进措施,不断加强对临床医师和编码员的培训、加强病案首页质控、加强信息系统建设,从而提高DRGs入组率。展开更多
基金Supported by Trans-century Training Program Foundation for the Talents by the State Education Commission
文摘This paper proved the statement that a good linear block encoder is in fact a good local-random sequence generator. Furthermore, this statement discovers the deep relationship between the error-correcting coding theory and the modern cryptography.
基金This work was supported in part by the National Science Foundation of China(No.61772539,6187212,61972405),STITSX(No.201705D131025),1331KITSX,and CiCi3D.
文摘Stereolithographic(STL)files have been extensively used in rapid prototyping industries as well as many other fields as watermarking algorithms to secure intellectual property and protect three-dimensional models from theft.However,to the best of our knowledge,few studies have looked at how watermarking can resist attacks that involve vertex-reordering.Here,we present a lossless and robust watermarking scheme for STL files to protect against vertexreordering attacks.Specifically,we designed a novel error-correcting code(ECC)that can correct the error of any one-bit in a bitstream by inserting several check digits.In addition,ECC is designed to make use of redundant information according to the characteristics of STL files,which introduces further robustness for defense against attacks.No modifications are made to the geometric information of the three-dimensional model,which respects the requirements of a highprecision model.The experimental results show that the proposed watermarking scheme can survive numerous kinds of attack,including rotation,scaling and translation(RST),facet reordering,and vertex-reordering attacks.
基金Project supported by the National Natural Science Foundation of China (Grant No. 61072071)
文摘Quantum secret sharing（QSS） is a procedure of sharing classical information or quantum information by using quantum states. This paper presents how to use a [2k- 1, 1, k] quantum error-correcting code （QECC） to implement a quantum （k, 2k-1） threshold scheme. It also takes advantage of classical enhancement of the [2k-1, 1, k] QECC to establish a QSS scheme which can share classical information and quantum information simultaneously. Because information is encoded into QECC, these schemes can prevent intercept-resend attacks and be implemented on some noisy channels.
文摘目的分析某专科医院在疾病诊断相关组(diagnosis related groups,DRGs)结算模式下存在的未入组病例问题,并提出相应的改进措施。方法通过回顾性分析和专家讨论,选取并总结某专科医院2021年1月—2022年6月上传至市医保平台病例信息管理系统中病例33935例中未入组病例300例,并对所有的未入组病例进行深入分析。结果未入组病例原因主要为主要诊断编码或者手术编码为灰码、医保版本切换导致原本入组的有效主诊断变成无效主诊断、主要诊断编码国家临床版医保版没有做好对照和临床医师主要诊断选择错误等方面。结论通过对医院DRGs结算模式下未入组病例的全面分析,找到改进措施,不断加强对临床医师和编码员的培训、加强病案首页质控、加强信息系统建设,从而提高DRGs入组率。
