Pre-existing orthorhombic embryos-induced hexagonal-orthorhombic martensitic transformation in MnNiSi_(1-x)(CoNiGe)_x alloy

The thermal-elastic martensitic transformation from high-temperature Ni_(2)In-type hexagonal structure to low-temperature TiNiSi-type orthorhombic structure has been widely studied in MnMX(M=Ni or Co,and X=Ge or Si)alloys.However,the answer to how the orthorhombic martensite nucleates and grows within the hexagonal parent is still unclear.In this work,the hexagonal-orthorhombic martensitic transformation in a Co and Ge co-substituted MnNiSi is investigated.One can find some orthorhombic laths embedded in the hexagonal parent at a temperature above the martensitic transformation start temperature(M_(s)).With the the sample cooing to M_(s),the laths turn broader,indicating that the martensitic transformation starts from these pre-existing orthorhombic laths.Microstructure observation suggests that these pre-existing orthorhombic laths do not originate from the hexagonal-orthorhombic martensitic transformation because of the difference between atomic occupations of doping elements in the hexagonal parent and those in the preexisting orthorhombic laths.The phenomenological crystallographic theory and experimental investigations prove that the pre-existing orthorhombic lath and generated orthorhombic martensite have the same crystallography relationship to the hexagonal parent.Therefore,the orthorhombic martensite can take these pre-existing laths as embryos and grow up.This work implies that the martensitic transformation in MnNiSi_(1-x)(CoNiGe)_(x) alloy is initiated by orthorhombic embryos.

Theory and application of equivalent transformation relationships between plane wave and spherical wave

Based on the governing equations and the equivalent models, we propose an equivalent transformation relationships between a plane wave in a one-dimensional medium and a spherical wave in globular geometry with radially inhomogeneous properties. These equivalent relationships can help us to obtain the analytical solutions of the elastodynamic issues in an inhomogeneous medium. The physical essence of the presented equivalent transformations is the equivalent relationships between the geometry and the material properties. It indicates that the spherical wave problem in globular geometry can be transformed into the plane wave problem in the bar with variable property fields, and its inverse transformation is valid as well. Four different examples of wave motion problems in the inhomogeneous media are solved based on the presented equivalent relationships. We obtain two basic analytical solution forms in Examples I and II, investigate the reflection behavior of inhomogeneous half-space in Example III, and exhibit a special inhomogeneity in Example IV, which can keep the traveling spherical wave in constant amplitude. This study implies that our idea makes solving the associated problem easier.

Coupling Relationship Among Technological Innovation,Industrial Transformation and Environmental Efficiency:A Case Study of the Huaihai Economic Zone,China

The 14th Five-Year Plan period is a critical period for China to achieve high-quality development. Based on super-efficiency slacks-based measure(SBM) model, grey-related analysis(GRA) and other models, this paper studies the heterogeneity of the coupling relationship among technological innovation, industrial transformation and environmental efficiency in the Huaihai Economic Zone during the period of 2005-2019. In addition, it analyzes the coupling mechanism of single and binary systems to the ternary system, which is of great significance for the collaborative symbiosis among systems. The findings are as follows. 1) The technological innovation, industrial transformation and environmental efficiency(TIE) systems of the Huaihai Economic Zone had significant spatial-temporal heterogeneity. Although their evaluation value fluctuated, the development trends are all positive. Ultimately, technological innovation is characterized by being high in the northeast and low in the southwest around Xuzhou, while other systems are relatively staggered in space. 2) The coupling of TIE systems is in transition, lack of orderly integration and benign interaction. However, the developing trend of interaction is also upward, and a spatial pattern driven by Xuzhou and Linyi as the dual cores has gradually formed. Moreover, the coupling is mostly manifested as outdated technological innovation and industrial transformation. Except for the final coordination of regenerative cities, the other resource types are all in transition. Cities in all traffic locations are still in transition. The overall system interaction of cities on Longhai Line(Lanzhou-Lianyungang Railway) is relatively optimal, and cities on Xinshi Line(Xinxiang-Rizhao Railway) are accelerating toward synergy. 3) The coupling status of TIE systems depends on the development of the single system and the interaction of the binary(2E) system. The coupling is closely related to technological innovation and Technology-Industry system,and is hindered by the inefficient interaction of Technology-Environment system. Specifically, the synergy of regenerative cities is attributed to the advantage of a single system and the effective integration of 2E systems. Beneficial from the advantages of environmental efficiency, the cities on Xinshi Line promote the synergy of the 2E and TIE systems. Therefore, while the Huaihai Economic Zone stimulates the development potential of the single and 2E systems, it is necessary to amplify the superimposition effect of systems in accordance on the basis of resource and location.

Accurate Registration of Remote Sensing Images Based on Local Optimal Transformation

As the basic work of image stitching and object recognition,image registration played an important part in the image processing field.Much previous work in registration accuracy and realtime performance progressed very slowly,especially in registrating images with line feature.An innovative method for image registration based on lines is proposed,it can effectively improve the accuracy and real-time performance of image registration.The line feature can deal with some registration problems where point feature does not work.Our registration process is divided into two parts.The first part determines the rough registration transformation relation between reference image and test image.Then the similarity degree among different transformation and modified nonmaximum suppression(MNMS)algorithms are obtained,which produce local optimal solution to optimize the rough registration transformation.The final optimal registration relation can be obtained from two registration parts according to the match scores.The experimental results show that the proposed method makes a more accurate registration relation and performs better in real-time situation.

A Crystallography Study of Bainitic Transformation in a Cu-Zn-Al Alloy

The crystallographic nature of initial isothermal phase transformation in Cu-26Zn-4Al (wt-％) was investigated. The kinetic transforma- tion curve, morphology, crystal structure, substructure, orientation relationship and twin relationship of bainite plates have been studied by means of optical and transmission electron microscopy. The experimental results showed that the characteristics of initial 8→bainite transformation are not exactly consistent with that found in martensite transformation, for example, orientation relationship between matrix and bainite does not exist in martensite transformation.

Influence of Network Embedding on the Transformation Performance of Original Equipment Manufactures

Based on the embeddedness theory,this paper analyzes the impact of network embedding features and types on the transformation performance of foundry enterprises.Through the investigation and analysis of more than 200 foundry enterprises in Zhejiang Province,it is found that network relationship embedding and structure embedding have positive impacts on transformation of foundry enterprises.Professional embedding and technical embedding have a positive effect in the transformation of foundry enterprises,and knowledge absorption ability has a positive adjustment role in the transformation performance of network embedding foundry enterprises.

Ontogeny of expression of transforming growth factor-βand its receptors and their possible relationship with scarless or scar-forming healing in human fetal and postnatal skins

Fetal eutaneous wounds that oeeur in earlygestation heal without sear formation.Althoughmueh work has been done to eharaeterize the roleof transforming growth

Between the Heaven and Human Beings: On the Idea of the Heaven and the Transformation of Poetry in the Mid-Tang Dynasty

The relationship between the Heaven and human beings is a central issue in the transformation of Confucianism in the Mid-Tang Dynasty.The discourses on the Heaven by Han Yu,Liu Zongyuan,and Liu Yuxi helped to promote the transformation and greatly influenced the transformation in literature.The differences in the poetry among the three authors may also be interpreted from the perspective of their perceptions of the Heaven—Han Yu’s discourse on the Heaven focused on the enemy-relationship between the Heaven and human beings,so his poems always showed tension and loss.Liu Zongyuan was interested in the alienation between the heaven and human beings,so his poems were more rational and placid than Han Yu’s.However,Liu Yuxi’s discourse on the Heaven paid attention to the positive influence of the Heaven on human beings,and most of his poems were filled with reason.The changes in the relationship between the Heaven and human beings lead to the broadened themes,innovated vocabulary,diversified styles,and varied fresh imageries.Likewise,the relationship between the Heaven and human beings established in the Song Dynasty led accordingly to a new type of literature different from the Tang literature.

亲清政商关系与企业数字化转型

在数字经济时代,数字化转型是企业实现高质量发展的内生要求,而企业的数字化转型离不开政府的引导和支持。基于此,分析检验当前亲清政商关系构建会如何影响微观企业的数字化转型,有助于企业实现高质量发展。利用2016—2020年中国A股传统行业上市公司的年度观察数据研究发现,亲清政商关系对企业数字化转型具有显著的正向影响,即在政商关系越亲清的地区,企业的数字化水平越高,并且这种正向影响在非国有企业中表现得更强。进一步的机制检验表明,亲清政商关系主要通过“市场导向效应”和“资源供给效应”对企业数字化转型发挥积极的促进作用。更具有启发意义的是,主要是政商关系的“亲近化”而不是政商关系的“清白化”助力了企业的数字化转型,而且亲清政商关系能够降低传统政治关联的相关影响。

“外察”与“内省”:环境威胁引发的绿色消费意愿研究——基于道德情绪的双路径模型

营销学者在探究绿色消费议题方面做了众多开创性工作,然而针对诱因不同的环境威胁是否及通过怎样的心理路径影响消费者绿色消费意愿的研究仍然匮乏。本文将环境威胁分为自然因素引发的环境威胁和人为因素引发的环境威胁两类,通过4组实验检验了两类环境威胁影响消费者绿色消费意愿的心理机制。研究结果证实了无论哪类环境威胁,都会对绿色产品购买行为产生积极影响,但不同类型的环境威胁会通过差异化认知过程和情绪反应影响绿色产品购买行为。当消费者面对自然因素引发的环境威胁时,其“外察”思维模式会起主导作用,此时敬畏感是促进绿色产品购买意愿的中介变量;当消费者面对人为因素引发的环境威胁时,其“内省”思维模式会起主导作用,此时内疚感是促进绿色产品购买意愿的中介变量。研究也证实了环境威胁对道德情绪的影响会受自然联结性和道德提升感的调节。

绿色转型:关系调适、基本样态及其发轫机制

经典环境社会学研究聚焦环境问题或环境衰退的学理解剖与理论阐释,呈现“环境衰退论”的叙事特征。为应对环境挑战,人类积极调整人与自然以及人与人之间的关系,推动社会的绿色转型,勾勒出资源消耗迈向资源善用、环境损害迈向生态修复、生态代谢断裂迈向生态循环以及失序发展迈向协调发展的基本轮廓。制度-政策势能、经济-技术变革和社会-文化浪潮构成绿色转型赖以发轫和发展的基本机制,其中,制度-政策势能在中国的绿色转型实践中扮演着关键性角色。当前,绿色转型虽然已不只是学术想象与学术倡导,但这种转型实践还处于趋势性状态,面临着不平衡性、不稳定性和不充分性的挑战。对此,环境社会学需要持续开展更为深入的学理研究。

智能时代学校组织变革的管理者——教师协同关系研究:基于多主体仿真方法

运用智能技术激活教育数据价值、创新教学实践、赋能教育治理,是当前教育数字化转型与智能教育变革的实施路径。而在促进教育数字化转型成功之路上,既需要充分发挥管理者“自顶向下”的宏观决策,也需要充分调动教师群体通过“自底向上”的教学实践创新,更需要寻求二者相互融合、协同的均衡关系,以推动智能时代下学校组织的变革与重塑。为深入探究管理者与教师在学校组织变革中的协同关系,研究综合复杂性科学和组织变革理论,通过设计多主体仿真系统,以仿真实验的方法剖析二者的复杂协同作用。研究通过仿真数据分析,详细探讨了管理者他组织与教师自组织在不同初始情况、不同协同模式下,对学校组织变革产生的六类影响结果。最终,研究结论揭示:教师的自组织教学创新实践是学校人工智能变革的基础;管理者他组织的战略决策是提升学校组织变革绩效上限的关键;他组织与自组织的关系处于均衡,并更关注教师群体的实践智慧时,能够最大程度推动智能教育变革的实施。

基于多特征符号聚合近似和层次聚类的户变关系识别方法

针对低压配电台区拓扑档案中可能存在的户变关系异常问题,文中提出了一种基于多特征符号聚合近似(MF-SAX)和层次聚类的户变关系识别方法。首先,运用符号聚合近似表达方法将用户电压时间序列转化为字符串序列,并引入电压波动系数和电压变化趋势两个附加参数对其特征表达进行强化。然后,基于编辑距离生成用户电压曲线相似性矩阵,并结合层次聚类算法实现户变关系的识别。最后,实际算例结果表明,提出的方法相比于现有方法准确率更高,误报更少,能直接应对数据缺失的情况,且具有更高的效率。

现代广告的四重角色:基于广告与内容关系变迁的视角

现代广告的发展始终伴随着与媒体内容如何相处的难题:一方面,媒体内容是现代广告生长的土壤和环境,广告依附内容又干扰内容;另一方面,现代广告为媒体内容的免费传播提供了资金来源,媒体内容离不开广告又希望远离广告。两者既矛盾又纠缠的关系呈现出打断、配合、伪装和共生的四种主要发展形态,并显现出现代广告发展的内在逻辑和外在动力:广告趋向内容,既模仿媒体内容的形式,也追求媒体内容的品质。从打断、配合、伪装到共生,现代广告向媒体内容的每一次趋近,都是对自身局限的超越,是从品牌价值向用户价值的回归。

企业数字化转型对供应商创新的机制影响研究

在数字经济快速发展背景下,数字化转型已成为企业的关注焦点,供应商作为企业发展的重要合作伙伴,其创新水平受到广泛关注。基于供应商-客户关系视角,以2012—2021年A股上市制造业企业为样本,探究企业数字化转型对供应商创新的作用机制。研究发现:第一,企业数字化转型与供应商创新绩效正相关,表明企业数字化转型有助于供应商创新绩效的提高,该结论在经过一系列稳健性和内生性检验后依旧成立;第二,供应商集中度对企业数字化转型促进供应商创新具有正向调节作用;第三,进一步分析发现,企业数字化转型通过倒逼效应和创新溢出效应促进供应商创新绩效提升。

创造性与“新文科”的现代取向——以“第一轴心期”转向“第二轴心期”为背景

一般认为,大理科是以创造性为基本取向的学科,大文科则以秩序的供给呈现出保守的一面。其实这是一个误解。创造性是现代科学文化、人文文化与社会科学文化的共同特征。人文社会科学知识的刷新,也就是它的创造性,丝毫也不弱于大理科。从传统文化的“两创”扩展出来的新文科“两创”命题,促使人们意识到大文科在维护人文价值与创新知识体系上的双重责任。文科在目前大学体制中的被动处境,是文科新旧更替的现实动力。新文科需要以当下的“现代”品格确立其学科特性,以求新文科能够成功顺应科技革命掀起的知识变革大潮,让新文科能够重现“第一轴心期”的人文学辉煌,一改文科尾随理工科的颓势。为此,文科需要祛除“无用即大用”的自辩自限,以学科的跨越、知识的综合、当下“现代”呈现的“第二轴心期”的全新解释为取径,确立自己的宏大使命。新文科之“新”的根本含义即在于此。

基于实体-联系模型的中医药标准关系模型构建研究

体量日趋庞大的中医药标准为制修订工作和综合管理带来严峻挑战,利用数字技术为标准赋能具有重要战略意义。本研究通过对中医药标准名称信息的深度挖掘和解读,提出基于实体-联系模型的标准间关系建模方法,构建包含7种关系模式的关系模型,并以标准检索为例展示模型的应用场景,为机器读取和使用标准、提高中医药标准检索效率、掌握目标标准相关资源、推动中医药标准数字化转型提供支撑。

数字化转型程度与国有示范企业治理效率

随着物联网以及大数据等技术的更迭升级与广泛应用,通过数字化提升国有企业治理效率变得愈发重要。选取2003—2022年入选“双一流”示范企业名单61家A股上市国有示范企业为研究对象,实证研究数字化转型程度对国有示范企业治理效率的影响。研究发现:数字化转型程度与国有示范企业治理效率之间存在“U”型关系,随着数字化转型程度由过渡阶段上升到适度阶段,其对国有示范企业的影响由抑制效应转为促进效应;Utest检验结果表明,现阶段绝大多数国有示范企业处于“阵痛区间”,表现为对治理效率的负向影响;数字转型程度“U”型影响资本密集型行业和东部地区的国有示范企业的治理效率,负向影响劳动密集型行业和中西部地区的国有示范企业的治理效率。因此,管理者要认识到数字化转型的两面性;企业应遵循与自身发展相契合的数字化转型路径;政府应科学评估企业数字化转型,并持续夯实数字化转型的基础环境。

基于改进FCM和最小互信息算法的户变关系辨识方法

随着低压分布式光伏的高比例接入,传统的户变关系辨识方法利用电压与功率特征进行判断,受光伏出力影响较大。针对分布式光伏大规模接入下低压配电网的电气特征,提出了一种基于数据驱动的低压配电网户变关系辨识方法。首先,基于改进模糊C均值(fuzzy C-means, FCM)聚类算法,利用电压相关性对用户进行初步聚类划分。其次,在初步聚类的基础上,利用最小互信息算法排除光伏出力的影响,建立配变与用户的连接关系识别模型并用回归分析的思想求解,实现对户变关系的精确辨识。最后,通过对某地实际数据进行算例分析,验证了基于改进FCM和最小互信息算法的户变关系辨识方法在大规模光伏接入场景下的有效性。实验表明,该方法相比传统的电压和功率特征判别方法具有更高的准确率。

高比例户用光伏接入下低压配电网户变关系识别

近年来,随着分布式光伏的发展,用户可参与的户用光伏系统在低压配电网中的并网数量快速增长。针对高比例户用光伏下的低压配电网具备的基本特征,提出一种基于台区配变及用户功率平衡关系的光伏时序功率卷积模型,并在此基础上,采用基于高斯混合模型的电压聚类优化目标函数进行户变关系识别。首先,基于用户-配变功率平衡关系,建立了高比例户用光伏的低压户变关系的多元线性回归模型;其次,提出一种基于Bi LSTM算法的光伏时序识别方法,筛选出光伏瞬时渗透率最高的时序片段;根据已识别的光伏时序片段建立光伏权重矩阵,并引入该矩阵将多元线性回归模型进行加权回归后转化为光伏时序功率卷积模型求解,在平抑光伏波动影响的同时初步识别户变从属关系;然后,提出一种基于高斯混合模型进行电压聚类的优化目标函数作为验证步骤,能够进一步排除验证错误的用户,提高户变关系的准确率;最后,以某地区实际低压配电网为例,分别使用该地区推广户用光伏前后不同时期的历史数据集进行识别,通过识别结果对比,验证了所提方法的有效性和实用性。