A Fusion Localization Method Based on Target Measurement Error Feature Complementarity and Its Application

In the multi-radar networking system,aiming at the problem of locating long-distance targets synergistically with difficulty and low accuracy,a dual-station joint positioning method based on the target measurement error feature complementarity is proposed.For dual-station joint positioning,by constructing the target positioning error distribution model and using the complementarity of spatial measurement errors of the same long-distance target,the area with high probability of target existence can be obtained.Then,based on the target distance information,the midpoint of the intersection between the target positioning sphere and the positioning tangent plane can be solved to acquire the target's optimal positioning result.The simulation demonstrates that this method greatly improves the positioning accuracy of target in azimuth direction.Compared with the traditional the dynamic weighted fusion(DWF)algorithm and the filter-based dynamic weighted fusion(FBDWF)algorithm,it not only effectively eliminates the influence of systematic error in the azimuth direction,but also has low computational complexity.Furthermore,for the application scenarios of multi-radar collaborative positioning and multi-sensor data compression filtering in centralized information fusion,it is recommended that using radar with higher ranging accuracy and the lengths of baseline between radars are 20–100 km.

Complementarity in nurse-herbalism: Partnering with plants for the purpose of promoting health

Complementarity is a concept that has been defined by physicist Niels Bohr as a general principle that promotes“mutual understanding and respect among diverse cultures and allows for the unity of human knowledge.”[1]In physics,complementarity is demonstrated as the inclusion of the existence of contrasting particle and wave theories of light.Bohr suggested that complementarity could be used by other disciplines outside of physics.Complementarity in nursing is demonstrated by the integration of diverse health beliefs,philosophies,and healing practices for promoting health as greater balance in body,mind,emotion,and spirit.

Tree allometry responses to competition and complementarity in mixed-species plantations of Betula alnoides

Tree allometry plays a crucial role in tree survival,stability,and timber quantity and quality of mixed-species plantations.However,the responses of tree allometry to resource utilisation within the framework of interspecific competition and complementarity remain poorly understood.Taking into consideration strong-and weakspace competition(SC and WC),as well as N_(2)-fixing and non-N_(2)-fixing tree species(FN and nFN),a mixedspecies planting trial was conducted for Betula alnoides,a pioneer tree species,which was separately mixed with Acacia melanoxylon(SC+FN),Erythrophleum fordii(WC+FN),Eucalyptus cloeziana(SC+nFN)and Pinus kesiya var.langbianensis(WC+nFN)in southern China.Six years after planting,tree growth,total nitrogen(N)and carbon(C)contents,and the natural abundances of^(15)N and^(13)C in the leaves were measured for each species,and the mycorrhizal colonisation rates of B.alnoides were investigated under each treatment.Allometric variations and their relationships with space competition and nutrient-related factors were analyzed.The results showed a consistent effect of space competition on the height-diameter relationship of B.alnoides in mixtures with FN or nFN.The tree height growth of B.alnoides was significantly promoted under high space competition,and growth in diameter at breast height(DBH),tree height and crown size were all expedited in mixtures with FN.The symbiotic relationship between ectomycorrhizal fungi and B.alnoides was significantly influenced by both space competition and N_(2) fixation by the accompanying tree species,whereas such significant effects were absent for arbuscular mycorrhizal fungi.Furthermore,high space competition significantly decreased the water use efficiency(WUE)of B.alnoides,and its N use efficiency(NUE)was much lower in the FN mixtures.Structural equation modeling further demonstrated that the stem allometry of B.alnoides was affected by its NUE and WUE via changes in its height growth,and crown allometry was influenced by the mycorrhizal symbiotic relationship.Our findings provide new insights into the mechanisms driving tree allometric responses to above-and belowground resource competition and complementarity in mixed-species plantations,which are instructive for the establishment of mixed-species plantations.

Black Hole Complementarity in Terms of the Outsider and Insider Perspectives

A complementarity hypothesis concerning outsider and insider perspectives of a gargantuan black hole is proposed. The two thought experiments presented herein are followed by a brief discussion of a new interpretation of black hole interior “space-and-time-reversal”. Specifically, it is proposed that the “singularity” space of the black hole interior is time-like and the expansion time of the black hole interior is space-like. The resemblance of this new insider interpretation to our own expanding and redshifting big bang universe is compelling.

Online Inter-Modal Dispersion Monitoring Based on Four-Wave Mixing

A novel online Differential Mode Group Delay(DMGD)monitoring method based on four-wave mixing(FWM) in few mode fiber(FMF) transmission system is proposed, and the DMGD monitoring is achieved on the whole range of 15-50 ps/km. Detection principle is deduced and relationship of the power of idler waves and DMGD is analyzed. With various chromatic dispersion(CD)values, different line widths and different optical signal noise ratio(OSNR) values, the simulations are carried out. The simulation results show that this new DMGD monitoring method is less affected by different line widths and has a high tolerance for OSNR.

A Technical Note: Inter-Observer and Inter-Modality Variability of Cone-Beam Computed Tomography (CBCT) and Ultrasound (US) in Stereotactic Body Radiotherapy for Kidney Cancer

Introduction: To investigate the inter-observer and inter-modality variabilities of two imaging guided equipments—cone-beam computed tomography (CBCT) and ultrasound (US) in kidney stereotactic body radiotherapy. Methods: A renal metastasis case implanted with three gold anchor fiducial markers was firstly scanned by US to acquire a 3-dimension US image and followed by 4-dimension CBCT in every fraction. Seven observers retrospectively registered the pre-treatment images with the corresponding reference images based on the gold markers. Registration uncertainty of the observers between two imaging modalities was evaluated. Results: The uncertainties over whole treatment course in CBCT were 0.88 mm, 1.94 mm and 0.86 mm in lateral, longitudinal and vertical directions respectively;while 0.8 mm, 0.97 mm and 1.36 mm were found in US. Conclusion: The greatest uncertainty was found in longitudinal direction in CBCT due to the fact that the respiration motion is the most rigorous in cranial-caudal direction. In US, since the probe was hold almost in upright position, the strong echo in vertical direction was attributed to the greatest uncertainty for such direction.

基于互补性和依存度的中印农产品贸易合作研究

选取2002—2020年中国和印度农产品贸易数据,采用贸易互补性指数、产业内贸易指数、贸易结合度指数等对中印农产品贸易的互补性和依存度进行了测度,同时分析了两国的农产品贸易合作关系。结果表明:中印农产品在世界市场上的贸易互补性较低;双边贸易过程中印度对中国的农产品贸易互补性较强,中国对印度的农产品贸易互补性较低。中印农产品以产业间贸易为主,仅园艺产品的产业内贸易水平较高,并逐渐由垂直型转向水平型产业内贸易。中印在蔬菜、棉花等20种农产品具有产业间贸易互补空间,7种竞争性农产品中有2种具有产业内贸易互补空间。中印农产品贸易依存度较低,且中国对印度的农产品贸易依存度更低。根据研究结论,提出了加强中印发展战略对接、深化两国在农业领域的合作,充分发挥中印各自农产品比较优势、优化农产品贸易结构,努力提高农产品质量和差异化、推动中印农产品产业内贸易发展等对策建议。

产业数字化发展路径:互补性、动态性与战略性

数据正成长为一种新型生产要素,其无限供给的特征可以为经济高质量发展提供充分的要素支持。企业对数据、数字技术等相关要素的投资推动了产业数字化的发展壮大,产业数字化的根本动力就在于要素互补,多样化的要素互补方式为经济增长提供了更多可能性。数据作为核心要素驱动了二元经济结构的重构,也就是资本部门和劳动部门的再配置,产业组织以及产业结构也随之发生动态变化。传统产业与数字技术的融通,提高了企业的竞争力,数据先行者将率先建立竞争优势。国际分工体系中的产业链与价值链被重构,发展中国家如果能把握住这次战略机遇,将有可能实现“弯道超车”。

国有企业技术并购对企业模糊前端创新绩效的影响

基于多维邻近理论,探索技术并购对企业模糊前端创新绩效的影响,以及并购双方地理距离与收购方生产链位置的调节作用。利用2009—2019年国有企业并购数据进行实证检验,结果表明:并购双方技术相似性对企业模糊前端创新绩效具有显著负向影响,技术互补性对企业模糊前端创新绩效具有显著正向影响;并购双方地理距离、收购方所处生产链位置正向调节技术相似性与企业模糊前端创新绩效的关系以及技术互补性与企业模糊前端创新绩效的关系。采用工具变量法、替换样本研究区间和GMM估计法进行内生性与稳健性检验发现,上述结论依然成立。结论有助于深化对国有企业技术并购与模糊前端创新关系的认识,从而为企业通过技术并购实现模糊前端创新提供实践启示。

基于源荷匹配的梯级水风光蓄系统优化运行研究

在“双碳”目标下,我国亟需进行能源结构转型,提高可再生能源在电力系统中的比例。调节性水电站和抽蓄电站具有良好的调蓄能力,可以作为调节电源与风光电源联合运行,从前端减缓风光不稳定出力对电力系统的冲击,促进新能源集中上网消纳。因此,充分利用梯级水电站及抽水蓄能电站的调节性能,制定合理的一体化调度策略,有利于在发电侧实现水风光蓄打捆送出和协同消纳,助力“双碳”目标实现。基于对梯级水风光蓄互补发电系统在短期调度中电网侧负荷需求和梯级水电水资源利用率的考虑,构建以源荷差异最小、梯级水电蓄能增量最大为目标,以常规水电站、风光电站、抽水蓄能电站安全运行条件为约束的短期互补调度模型,并采用粒子群-动态规划内外层嵌套算法对模型进行求解。选取西南某流域常规梯级水电站、抽水蓄能电站及周边风光电站组成的水风光蓄互补发电系统为研究对象进行模拟计算,结果表明:(1)抽水蓄能电站倾向于在梯级电站水头较低时选择泄水发电,而在梯级电站水头较高时选择抽水或维持当前水位不变;(2)所构建模型有效提高了系统总出力曲线与电网负荷曲线的匹配度,实现了梯级水电站之间负荷与水量的合理分配,一定程度上减少了梯级水电站效益损耗,提高了水能利用率,增加了梯级水电蓄能增量,有利于源网协同运行和梯级电站之间的稳定运行。

阿达木单抗还原肽指纹图谱鉴别方法的建立与验证

目的 建立阿达木单抗基于高分辨质谱的肽指纹图谱表征分析方法及用于质控放行的肽指纹图谱液相鉴别方法。方法 阿达木单抗经变性、还原、烷基化和酶解后,应用高分辨质谱测定阿达木单抗氨基酸序列覆盖率,并确证互补决定区(complementarity determining region, CDR)特征肽段。建立能够有效鉴别阿达木单抗肽指纹图谱的液相色谱分析方法,并进行方法学验证和应用评价。结果 阿达木单抗经胰蛋白酶(Trypsin)和胞内蛋白酶(Lys-C)酶解后,CDR肽段均由高分辨质谱完成确证。贝伐珠单抗和利妥昔单抗用于评估方法专属性,结果表明该方法专属性强。选择Fc段保守氨基酸序列作为参比峰,以CDR特征肽段的相对保留时间(RRT)和相对峰面积(RPA)考察方法的变异程度。Trypsin酶解的样品连续5次进样各特征肽段RRT的RSD在0.008%~1.097%之间,RPA的RSD在1.212%~7.951%之间;中间精密度考察各特征肽段RRT的RSD在0.010%~0.985%之间,RPA的RSD在2.306%~10.939%之间;酶切比例为1∶35~1∶45,酶切时间为3.5~4.5 h时,RRT和RPA的RSD均符合方法耐用性要求。Lys-C酶解的样品方法学验证结果也表明其精密度、耐用性均表现良好。不同色谱柱对肽段的选择性、保留强弱、分离效果以及峰强度等具有一定差异。结论 建立的基于Trypsin/Lys-C酶切、鉴定CDR特征肽段的高效液相肽指纹图谱鉴别方法可用于阿达木单抗的质量控制及批检验放行,同时可为企业建立单抗肽指纹图谱鉴别方法提供参考。

风光对水电调峰能力的影响初探:基于调峰幅度的角度

水风光互补是当前能源行业的研究潮流和方向,但风光出力的不稳定性和不可控性势必会影响水电站调峰能力的发挥。本研究旨在从调峰幅度角度为水电调峰能力评估及风光并入后对其的影响量化提供一种参考思路。首先提出了周期调节幅度、最大时段调节幅度、时段累计调节幅度以及水电站综合调峰幅度4个指标来评估水电站调峰状况,其次构建了水风光互补运行模型,并通过有无风光工况下4个指标的变化率来量化风光对水电调峰幅度的影响。通过某电网调峰梯级水电及其周边风光资源的多场景模拟计算得出,相比无风光场景,风电和光伏对单个指标的影响趋势不同,但无论是风电还是光伏,接入系统后,梯级水电都须发挥更大的综合调峰幅度才能调节消纳风光。结果表明,风光接入会给水电调峰带来不利影响,并且该影响具有累积效应。

Dashnic-Zusmanovich矩阵线性互补问题的误差界

研究Dashnic-Zusmanovich矩阵A的线性互补问题的误差界估计,给出只涉及矩阵A的元素的逆矩阵无穷范数的新上界,利用两类重要不等式以及放缩技巧,给出矩阵A的线性互补问题的误差界。

基于概率逻辑推理的高阶互补云API推荐方法

云时代,云API作为服务交付、数据交换和能力复制的最佳载体,已成长为当今面向服务软件开发和企业数字化转型不可或缺的核心要素.然而动态开放网络中持续增长的云API在给开发者提供了更多选择的同时,也将其淹没在海量的云API选择之中,设计有效的云API推荐方法就此成为API经济健康发展中迫切要解决的现实问题.但是,现有研究主要利用搜索关键词、服务质量和调用偏好进行建模,生成质量高功能单一的云API推荐列表,没有考虑服务化软件实际开发中开发者对多元化高阶互补云API的客观需要.高阶互补云API推荐旨在为多个查询云API生成多元互补云API列表,要求推荐结果与查询云API均互补,以满足开发者的联合需求.针对此问题,本文提出基于概率逻辑推理的高阶互补云API推荐方法(Probabilistic Logic Reasoning for High-order Complementary Cloud API Recom⁃mendation,PLR4HCCR).首先,通过云API生态真实数据分析论证云API互补推荐需求的必要性和互补关系建模中替补噪声的客观存在,为云API互补推荐问题研究提供动机和数据支持.其次,采用Beta概率嵌入对云API及其之间的关系约束进行编码,以刻画云API间互补关系的不确定性和支持互补逻辑推理.接着,设计由投影、取反和交并三个基本逻辑算子构建的互补关系逻辑推理网络,使查询集中的每个云API获得非对称互补关系感知和替补噪声消解约束下的互补云API表示.然后,引入注意力机制为查询云API的互补云API分配不同权重,增强高阶互补云API基向量的表征能力.在此基础上,采用KL散度度量高阶互补云API基向量与候选云API之间的距离,并根据KL散度排序生成高阶互补性可感知下的云API推荐结果.最后,我们利用两个真实云API数据集在不同阶互补推荐场景下进行实验,实验表明,与传统启发式推荐方法和深度学习推荐方法相比,PLR4HCCR在互补关系感知推理和替补噪声消解方面均具有较大的优势,继而使其在低阶、高阶和混合阶互补云API推荐中均展示出更优的推荐效果和更强的泛化能力.进一步,超参数敏感性实验、实例分析和用户调查验证了方法的有效性、实用性和可行性,这使结合高阶互补关系的云API推荐方法PLR4HCCR不仅更有可能生成开发者满意的结果,而且可有效提升云API服务提供者的收益.

水风光大基地资源分析要求和方法

近年来,由于“极热无风”“晚峰无光”“云来无光”“冬季枯水”甚至极端天气导致的“汛期反枯”等气象问题加剧了能源保供的压力,能源开发方式将不能局限于单一能源品种,而应呈现多能互补方式,清洁可再生的“水风光”多能互补开发,可以最大程度地带动流域内风光资源的开发利用,弥补新能源发电的出力不足,是保障电量可靠供给的有效方式。水风光资源的特性与时空分布是水风光多能互补规划设计和调度运行的基础与依据,本文首先论述了水风光资源特性及其评估方法,进而开展对水风光互补特性的研究,最后针对水风光大基地在规划设计和调度运行中的资源分析方法进行论述。

决策顺序对供应链定价和收益影响研究

将供应链权力结构和定价机制统一纳入决策顺序理论框架,以由单一的供应商和两个零售商组成的供应链为研究对象,探讨决策顺序对供应链定价和收益的影响。结果表明,供应商权力结构会影响产品的最优批发价格,但并不影响供应链的最优决策;对于零售商来说,联合定价是占优策略,在互补性产品市场中符合供应商和供应链利益的选择,但在竞争性产品市场中供应商更期望零售商选择同时定价。研究结论为企业参与供应链竞争和价格决策提供参考。

中国与“一带一路”沿线国家文化产品贸易竞争性与互补性分析

介绍中国与“一带一路”沿线国家文化产品贸易现状,选取中国与“一带一路”沿线文化产品贸易往来密切的国家,运用显示性比较优势指数(RCA)、贸易互补性指数(TCI)以及格鲁贝尔—劳埃德指数(G-L)进行分析。结果表明:与“一带一路”沿线主要国家相比,中国的文化产品具有明显的比较优势;中国作为文化产品出口国的TCI指数大于中国作为文化产品进口国的指数,与“一带一路”国家存在着较大的合作潜力;双边文化产品贸易以产业间贸易为主。为挖掘中国与“一带一路”沿线国家之间的文化贸易潜力提出对策。

中国式现代化与中华艺术精神的创造性转化

“把马克思主义基本原理同中华优秀传统文化相结合”是马克思主义中国化时代化在新时代取得的重大理论创新成果。从现代化历史语境看,中国式现代化与中华传统文化之间形成了一种“相互赋予”的辩证关系,因而,脱离现代化历史语境,就无法辩证地处理传统与现代的关系,难以真正实现传统文化的“创造性转化”或“现代性转换”。从文化哲学视域看,“创新自觉”需要“文化自觉”和“哲学自觉”,马克思实践哲学思想与中国生命哲学智慧的会通融合,为“马克思主义基本原理同中华优秀传统文化相结合”提供了高度契合的哲学基础与阐释视域。从现代性理论视域看,在20世纪现代性反思中,以儒道两家为代表的东方文化成为补救西方现代性缺欠的重要思想资源,以“人与自然”“人与社会”“人与人”为现代视域,重新阐释儒道美学的精神实质、生存智慧与审美境界,才可能赋予传统以现代意义,真正实现中华美学和艺术精神的现代性转换。

中国与CPTPP成员国服务贸易竞争性和互补性分析

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