Article(id=1243220380849127438, tenantId=1146029695717560320, journalId=1242844143416819734, issueId=1243220377556595432, articleNumber=null, orderNo=null, doi=10.15959/j.cnki.0254-0053.2025.03.006, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1743955200000, receivedDateStr=2025-04-07, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1774336436711, onlineDateStr=2026-03-24, pubDate=1758729600000, pubDateStr=2025-09-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1774336436711, onlineIssueDateStr=2026-03-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774336436711, creator=13701087609, updateTime=1774336436711, updator=13701087609, issue=Issue{id=1243220377556595432, tenantId=1146029695717560320, journalId=1242844143416819734, year='2025', volume='46', issue='3', pageStart='541', pageEnd='810', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1774336435926, creator=13701087609, updateTime=1774336648182, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1243221267898282005, tenantId=1146029695717560320, journalId=1242844143416819734, issueId=1243220377556595432, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1243221267898282006, tenantId=1146029695717560320, journalId=1242844143416819734, issueId=1243220377556595432, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=631, endPage=648, ext={EN=ArticleExt(id=1243220381142728720, articleId=1243220380849127438, tenantId=1146029695717560320, journalId=1242844143416819734, language=EN, title=Interfacial Consistency and Convergence Analysis of Multiscale Coupling Method Based on Bilinear Interpolation, columnId=null, journalTitle=Chinese Quarterly of Mechanics, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Interface consistency and error convergence are central issues in concurrent multiscale computational methods, particularly critical for atomistic-to-continuum coupling models. However, existing theoretical studies remain limited and are mostly confined to one-dimensional settings. This work focuses on the multiresolution molecular mechanics (MMM) approach and systematically investigates the impact of various energy sampling schemes on interface consistency and error convergence. Two-dimensional square and triangular lattice models containing both atomistic and coarse-grained regions are constructed under bilinear element interpolation. The results show that interface secondary sampling schemes can significantly improve consistency in the interfacial region, with the scheme incorporating all neighboring layers achieving the best performance. Error analysis reveals that discretization error dominates the total error, and increasing the number of secondary sampling points effectively reduces the sampling error, particularly under tensile loading conditions. Moreover, both lattice types exhibit consistent error convergence behavior, demonstrating high generality of the method to different structures. This study highlights the advantages of energy sampling strategies in improving interface treatment and convergence behavior in MMM, providing theoretical support for the development of high-accuracy multiscale computational mechanics methods.
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界面一致性与误差收敛性是并发多尺度计算方法中的核心问题,尤其在原子-连续介质耦合模型中尤为关键.然而,现有理论研究工作较少并且多聚焦于一维情况.本文以多分辨率分子力学方法为研究对象,通过构建原子区域与粗化区域共存的二维方形与三角形原子晶格模型,系统探究了双线性单元插值条件下不同能量采样方案对界面一致性和误差收敛性的影响.研究发现:界面次采样方案可显著提升界面区域一致性,其中包含所有近邻层的采样方案性能最优;误差分析结果显示,离散误差是总误差的主要来源,增加次采样点数量可有效降低采样误差,尤其在拉伸工况下表现显著.此外,两类晶格结构在误差收敛性方面展现出一致规律,验证了方法在不同晶格结构中的普适性.本研究显示了多分辨率分子力学方法中能量采样方案在处理界面一致性与收敛性方面的优势,为发展高精度跨尺度计算力学方法提供了理论支撑.
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Journal of Computational Physics,
2017,
336: 212-234., articleTitle=Multiresolution molecular mechanics: Surface effects in nanoscale materials, refAbstract=null)], funds=[Fund(id=1243220412709061586, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, awardId=12272214, language=CN, fundingSource=国家自然科学基金(12272214), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1243220404773438084, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, xref=null, ext=[AuthorCompanyExt(id=1243220404781826693, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, companyId=1243220404773438084, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200070, China), AuthorCompanyExt(id=1243220404790215302, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, companyId=1243220404773438084, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=上海大学 力学与工程科学学院,上海应用数学与力学研究所,上海 200070)])], figs=[ArticleFig(id=1243220407784948536, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.1, caption=
Schematic overview of the MMM method. Bilinear elements (represented by red dots) are employed to illustrate the domain decomposition and atomic classification in MMM: the domain occupied by black dots represents the atomic region, while the domainrepresented by finite elements represents the coarse-grained region. RAs and GAs denote representative atoms and ghost atoms, respectively. PSAs, SSAs, and NSAs represent Primary Sampling Atoms, Secondary Sampling Atoms, and Non-Sampling Atoms, respectively, figureFileSmall=1WJpiEaodAm467f7NTLv4Q==, figureFileBig=oJcqKpat6BdpWQ3wRKVQew==, tableContent=null), ArticleFig(id=1243220407910777662, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图1, caption=
MMM方法基本思想示意图.以双线性单元(用红色点表示)为例阐明全原子模型的区域分解思想和原子分类:黑色点所占区域为原子区域,有限单元所占区域为粗化区域.RAs和GAs分别表示代表性原子(Representative Atoms)和幽灵原子(Ghost Atoms).PSAs、SSAs和NSAs分别表示主采样原子(Primary Sampling Atoms)、次采样原子(Secondary Sampling Atoms)和非采样原子(Non-Sampling Atoms), figureFileSmall=1WJpiEaodAm467f7NTLv4Q==, figureFileBig=oJcqKpat6BdpWQ3wRKVQew==, tableContent=null), ArticleFig(id=1243220408187601740, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.2, caption=
Schematic of different energy sampling schemes for a square lattice coarse-grained by bilinear elements: (a) Full Sampling (FS): all ghost atoms (GAs) are used as secondary sampling atoms (SSAs, green); (b) Interface Secondary Sampling Scheme 1 (ISS1): one layer of interface atoms is used as SSAs; (c) Interface Secondary Sampling Scheme 2 (ISS2): two layers of interface atoms are used as SSAs; (d) No Secondary Sampling Scheme (NSS): no SSAs, figureFileSmall=N0J9JwFdqTtK8wX9hEbUNg==, figureFileBig=mvgYOsgB0418Bv/X2XmVKA==, tableContent=null), ArticleFig(id=1243220408397316947, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图2, caption=
方形晶格中采用双线性单元进行区域分解的不同能量采样方案示意图:(a)完全采样(FS):所有幽灵原子(GNs)作为次级采样点(SSAs,绿色);(b)界面次采样方案1(ISS1):一层界面原子作为次级采样点;(c)界面次采样方案2(ISS2):两层界面原子作为次级采样点;(d)无次采样方案(NSS):无次级采样点, figureFileSmall=N0J9JwFdqTtK8wX9hEbUNg==, figureFileBig=mvgYOsgB0418Bv/X2XmVKA==, tableContent=null), ArticleFig(id=1243220408535728985, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.3, caption=
Displacement field distribution along the vertical central y-axis of the coarse-grained square lattice model based on the respective full-atom (FA) scheme, full-sampling (FS) scheme, and MMM method (Interface Secondary Sampling Scheme 1 (ISS1), Interface Secondary Sampling Scheme 2 (ISS2), and No Secondary Sampling Scheme (NSS)), figureFileSmall=mcewhgUBr/HHV9HgxQRkOw==, figureFileBig=SBFiD8Iwkj+BBY5d+uxTWQ==, tableContent=null), ArticleFig(id=1243220408674141019, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图3, caption=
方形晶格多尺度模型中基于全原子(FA)方案、全采样(FS)方案及MMM方法(界面次采样方案1(ISS1)、界面次采样方案2(ISS2)及无次采样方案(NSS))沿竖直中心y轴的位移场分布, figureFileSmall=mcewhgUBr/HHV9HgxQRkOw==, figureFileBig=SBFiD8Iwkj+BBY5d+uxTWQ==, tableContent=null), ArticleFig(id=1243220408774804322, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.4, caption=
Schematic of different energy sampling schemes for a triangular lattice coarse-grained by bilinear elements: (a) Full Sampling (FS): all ghost atoms (GAs) are used as secondary sampling atoms (SSAs, green); (b) Interface Secondary Sampling Scheme 1 (ISS1): one layer of interface atoms is used as SSAs; (c) Interface Secondary Sampling Scheme 2 (ISS2): two layers of interface atoms are used as SSAs; (d) No Secondary Sampling Scheme (NSS): no SSAs, figureFileSmall=JHTu8W0kpTWYbAtfelJN6Q==, figureFileBig=g+JDj/6D0oYOSsxenib2Vg==, tableContent=null), ArticleFig(id=1243220408967742316, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图4, caption=
三角形晶格中采用双线性单元进行区域分解的不同能量采样方案示意图:(a)完全采样(FS):所有幽灵原子(GNs)作为次级采样点(SSAs);(b)界面次采样方案1(ISS1):一层界面原子作为次级采样点;(c)界面次采样方案2(ISS2):两层界面原子作为次级采样点;(d)无次采样方案(NSS):无次级采样点, figureFileSmall=JHTu8W0kpTWYbAtfelJN6Q==, figureFileBig=g+JDj/6D0oYOSsxenib2Vg==, tableContent=null), ArticleFig(id=1243220409127125876, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.5, caption=
Displacement field distribution along the vertical central y-axis of the coarse-grained triangular lattice model based on the respective full-atom (FA) scheme, full-sampling (FS) scheme, and MMM method (Interface Secondary Sampling Scheme 1 (ISS1), Interface Secondary Sampling Scheme 2 (ISS2), and No Secondary Sampling Scheme (NSS)), figureFileSmall=U8lmr3JE7pw3Gm4Mg76spQ==, figureFileBig=HKwTITSLkeoEKEN9ggTeKQ==, tableContent=null), ArticleFig(id=1243220409382978426, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图5, caption=
三角形晶格多尺度模型中基于全原子(FA)方案、全采样(FS)方案及MMM方法(界面次采样方案1(ISS1)、界面次采样方案2(ISS2)及无次采样方案(NSS))沿竖直中心y轴的位移场分布, figureFileSmall=U8lmr3JE7pw3Gm4Mg76spQ==, figureFileBig=HKwTITSLkeoEKEN9ggTeKQ==, tableContent=null), ArticleFig(id=1243220409492030335, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.6, caption=
Schematic of different energy sampling schemes for a coarse-grained square lattice using uniform bilinear elements in convergence analysis: (a) Full Sampling (FS): all ghost atoms (GNs) are used as secondary sampling atoms (SSAs, green); (b) Edge Secondary Sampling Scheme (ESS): interpolating element boundary atoms are used as SSAs; (c) Neighbor-Assisted Secondary Sampling Scheme (NAS): neighboring atoms of rep-atoms (RAs) are used as SSAs; (d) No Secondary Sampling Scheme (NSS): no SSAs, figureFileSmall=4EmPUeGVfZtmZtZYbz0CrA==, figureFileBig=Rj3ljxq6lQaOYu8GTZBVYg==, tableContent=null), ArticleFig(id=1243220409752077188, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图6, caption=
方形晶格中采用均匀双线性单元进行粗化和收敛性分析的不同能量采样方案示意图:(a)完全采样(FS):所有幽灵原子(GNs)作为次级采样点(SSAs);(b)边界次级采样方案(ESS):插值单元边界原子作为SSAs;(c)近邻次级采样(NAS)方案:代表性原子(RAs)的近邻原子作为SSAs;(d)无次级采样(NSS)方案:无次级采样点, figureFileSmall=4EmPUeGVfZtmZtZYbz0CrA==, figureFileBig=Rj3ljxq6lQaOYu8GTZBVYg==, tableContent=null), ArticleFig(id=1243220409886294921, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.7, caption=
Convergence behavior under different energy sampling schemes for the square lattice model under stretching conditions, figureFileSmall=Fps/t48oVI2ez8tfP7K/hA==, figureFileBig=OguQrxKV5sBJ0pB1d98GmQ==, tableContent=null), ArticleFig(id=1243220410070844299, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图7, caption=
在拉伸条件下方形晶格模型中不同能量采样方案的收敛行为, figureFileSmall=Fps/t48oVI2ez8tfP7K/hA==, figureFileBig=OguQrxKV5sBJ0pB1d98GmQ==, tableContent=null), ArticleFig(id=1243220410276365198, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.8, caption=
Schematic of a square lattice beam under bending conditions with edge secondary sampling (ESS), figureFileSmall=073oANHnqwynHTlDnilypg==, figureFileBig=dLMz4qLfUH9ha/nQrD2kQw==, tableContent=null), ArticleFig(id=1243220410398000023, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图8, caption=
方形晶格梁在弯曲条件下采用单元边界次采样方案的示意图, figureFileSmall=073oANHnqwynHTlDnilypg==, figureFileBig=dLMz4qLfUH9ha/nQrD2kQw==, tableContent=null), ArticleFig(id=1243220410561577882, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.9, caption=
Convergence behavior of different energy sampling schemes for the square lattice model under bending conditions, figureFileSmall=oYhI1KEEyIxnZDoAJe6PQA==, figureFileBig=2RuZlMiFlmTG6zeEVMZqlg==, tableContent=null), ArticleFig(id=1243220410699989918, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图9, caption=
方形晶格模型在弯曲条件下不同能量采样方案下的收敛行为, figureFileSmall=oYhI1KEEyIxnZDoAJe6PQA==, figureFileBig=2RuZlMiFlmTG6zeEVMZqlg==, tableContent=null), ArticleFig(id=1243220410821624739, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.10, caption=
Relative displacement and energy errors under tensile (a~b) and bending (c~d) conditions for the triangular lattice, figureFileSmall=Onu19hoIArGEtmX/suJ0yQ==, figureFileBig=bwJT/2D/1ymMQz5vYdEsMA==, tableContent=null), ArticleFig(id=1243220410918093733, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图10, caption=
三角形晶格拉伸条件下的(a)相对位移误差和(b)相对能量误差与(c)弯曲条件下的相对位移误差和(d)相对能量误差, figureFileSmall=Onu19hoIArGEtmX/suJ0yQ==, figureFileBig=bwJT/2D/1ymMQz5vYdEsMA==, tableContent=null), ArticleFig(id=1243220411006174120, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.11, caption=
Error structure analysis of the respective ESS ((a) and (b)), NAS ((c) and (d)), and NSS ((e) and (f)) schemes for the square lattice under tensile loading, figureFileSmall=xWJ8vYQmgkNzQaHFdbfWbA==, figureFileBig=TyrQtmUFX1ZIDHns6cBilQ==, tableContent=null), ArticleFig(id=1243220411132003244, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图11, caption=
方形晶格拉伸条件下分别采用边界次采样方案((a)和(b))、近邻次采样方案((c)和(d))和无次采样方案((e)和(f))的误差结构分析, figureFileSmall=xWJ8vYQmgkNzQaHFdbfWbA==, figureFileBig=TyrQtmUFX1ZIDHns6cBilQ==, tableContent=null), ArticleFig(id=1243220411278803888, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.12, caption=
Error structure analysis of the respective ESS ((a) and (b)), NAS ((c) and (d)), and NSS ((e) and (f)) schemes for the square lattice under bending, figureFileSmall=JEEhxkscmkLbh5yGWzhiAA==, figureFileBig=pMfLkLGGNDNvMf+PACXFhQ==, tableContent=null), ArticleFig(id=1243220411580793781, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图12, caption=
方形晶格弯曲条件下分别采用边界次采样方案((a)和(b))、近邻次采样方案((c)和(d))和无次采样方案((e)和(f))的误差结构分析, figureFileSmall=JEEhxkscmkLbh5yGWzhiAA==, figureFileBig=pMfLkLGGNDNvMf+PACXFhQ==, tableContent=null), ArticleFig(id=1243220411715011512, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.13, caption=
Error structure analysis of the respective ESS ((a) and (b)), NAS ((c) and (d)), and NSS ((e) and (f)) schemes for the triangular lattice under stretching condition, figureFileSmall=Xm7dcYdJqX43d7N08hytTQ==, figureFileBig=H18B49qVs76K0/M8mKhTCg==, tableContent=null), ArticleFig(id=1243220411819869115, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图13, caption=
三角形晶格拉伸条件下分别边界次采样方案(ESS,(a)和(b))、近邻次采样方案(NAS,(c)和(d))和无次采样方案(NSS,(e)和(f))的误差结构分析, figureFileSmall=Xm7dcYdJqX43d7N08hytTQ==, figureFileBig=H18B49qVs76K0/M8mKhTCg==, tableContent=null), ArticleFig(id=1243220411928921022, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Fig.14, caption=
Error structure analysis of the respective ESS ((a) and (b)), NAS ((c) and (d)), and NSS ((e) and (f)) schemes or the triangular lattice under bending, figureFileSmall=c6nF9zB1ud3CAi0iNopvrg==, figureFileBig=6qGRcSoosyFFuhsl6n0JJA==, tableContent=null), ArticleFig(id=1243220412029584322, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=图14, caption=
三角形晶格弯曲条件下分别采用边界次采样方案(ESS,(a)和(b))、近邻次采样方案(NAS,(c)和(d))和无次采样方案(NSS,(e)和(f))的误差结构分析, figureFileSmall=c6nF9zB1ud3CAi0iNopvrg==, figureFileBig=6qGRcSoosyFFuhsl6n0JJA==, tableContent=null), ArticleFig(id=1243220412197356487, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Tab.1, caption=
Displacement and energy field errors in the tensile example of 2D square lattice using different energy sampling approaches
, figureFileSmall=null, figureFileBig=null, tableContent=
| Sampling approach | Displacement error edisp | Energy error eE |
|---|
| Full-Sampling Scheme (FS) | 0.83% | 0.88% |
| Interface Secondary Sampling Scheme 1 (ISS1) | 1.25% | 1.57% |
| Interface Secondary Sampling Scheme 2 (ISS2) | 1.10% | 1.36% |
| No Secondary Sampling Scheme (NSS) | 2.55% | 3.68% |
), ArticleFig(id=1243220412314796998, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=表1, caption=
二维方形晶格拉伸算例中不同能量采样方案的位移场误差和能量场误差
, figureFileSmall=null, figureFileBig=null, tableContent=
| Sampling approach | Displacement error edisp | Energy error eE |
|---|
| Full-Sampling Scheme (FS) | 0.83% | 0.88% |
| Interface Secondary Sampling Scheme 1 (ISS1) | 1.25% | 1.57% |
| Interface Secondary Sampling Scheme 2 (ISS2) | 1.10% | 1.36% |
| No Secondary Sampling Scheme (NSS) | 2.55% | 3.68% |
), ArticleFig(id=1243220412457403339, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=EN, label=Tab.2, caption=
Displacement and energy field errors in the tensile example of 2D triangular lattice using energy sampling approaches
, figureFileSmall=null, figureFileBig=null, tableContent=
| Sampling approach | Displacement error edisp | Energy error eE |
|---|
| Full-Sampling Scheme (FS) | 1.43% | 1.34% |
| Interface Secondary Sampling Scheme 1 (ISS1) | 2.01% | 2.22% |
| Interface Secondary Sampling Scheme 2 (ISS2) | 1.85% | 1.88% |
| No Secondary Sampling Scheme (NSS) | 3.11% | 4.12% |
), ArticleFig(id=1243220412558066638, tenantId=1146029695717560320, journalId=1242844143416819734, articleId=1243220380849127438, language=CN, label=表2, caption=
二维三角形晶格拉伸算例中不同能量采样方案的位移场误差和能量场误差
, figureFileSmall=null, figureFileBig=null, tableContent=
| Sampling approach | Displacement error edisp | Energy error eE |
|---|
| Full-Sampling Scheme (FS) | 1.43% | 1.34% |
| Interface Secondary Sampling Scheme 1 (ISS1) | 2.01% | 2.22% |
| Interface Secondary Sampling Scheme 2 (ISS2) | 1.85% | 1.88% |
| No Secondary Sampling Scheme (NSS) | 3.11% | 4.12% |
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