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传统容态礼仪的存续与演变——坐容篇
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作者 袁冬梅 《江苏教育研究》 2021年第6期95-99,共5页
坐容被形容为“坐如尸”,意为“如果坐着,要像受祭之人那样端正”,是最为敬意的一种坐立姿态。文章基于礼仪教育经验,运用文献及比较研究法,从文献典籍所载资料出发,溯本求源,阐明“坐如尸”吉祥表敬意的意涵,从坐具、坐容、入座礼仪细... 坐容被形容为“坐如尸”,意为“如果坐着,要像受祭之人那样端正”,是最为敬意的一种坐立姿态。文章基于礼仪教育经验,运用文献及比较研究法,从文献典籍所载资料出发,溯本求源,阐明“坐如尸”吉祥表敬意的意涵,从坐具、坐容、入座礼仪细节三方面探寻传统坐容的存续与演变,回到初心,从“修形、修德、修智”三个维度揭示传统容态礼仪于当代礼仪教育的价值。 展开更多
关键词 传统容态 坐容 存续 演变
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Laser processing effects on Ti−45Nb alloy surface,corrosive and biocompatible properties
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作者 I.CVIJOVIĆ-ALAGIĆ S.LAKETIĆ +5 位作者 M.MOMČILOVIĆ J.CIGANOVIĆ Đ.VELJOVIĆ J.BAJAT V.KOJIĆ M.RAKIN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第8期2533-2551,共19页
The Ti−45Nb(wt.%)alloy properties were investigated in relation to its potential biomedical use.Laser surface modification was utilized to improve its performance in biological systems.As a result of the laser treatme... The Ti−45Nb(wt.%)alloy properties were investigated in relation to its potential biomedical use.Laser surface modification was utilized to improve its performance in biological systems.As a result of the laser treatment,(Ti,Nb)O scale was formed and various morphological features appeared on the alloy surface.The electrochemical behavior of Ti−45Nb alloy in simulated body conditions was evaluated and showed that the alloy was highly resistant to corrosion deterioration regardless of additional laser surface modification treatment.Nevertheless,the improved corrosion resistance after laser treatment was evident(the corrosion current density of the alloy before laser irradiation was 2.84×10^(−8)A/cm^(2),while that after laser treatment with 5 mJ was 0.65×10^(−8)A/cm^(2))and ascribed to the rapid formation of a complex and passivating bi-modal surface oxide layer.Alloy cytotoxicity and effects of the Ti−45Nb alloy laser surface modification on the MRC-5 cell viability,morphology,and proliferation were also investigated.The Ti−45Nb alloy showed no cytotoxic effect.Moreover,cells showed improved viability and adherence to the alloy surface after the laser irradiation treatment.The highest average cell viability of 115.37%was attained for the alloy laser-irradiated with 15 mJ.Results showed that the laser surface modification can be successfully utilized to significantly improve alloy performance in a biological environment. 展开更多
关键词 Ti−45Nb alloy laser surface scanning electrochemical properties BIOCOMPATIBILITY cell morphology
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略论汤炳正先生对语言起源研究之贡献——以《语言起源之商榷:黄译威尔逊〈语言产生之奇迹〉序》为中心
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作者 力之 《贵州师范大学学报(社会科学版)》 2014年第6期107-113,共7页
就我国20世纪前半叶有关语言起源之研究言,汤炳正先生的成果是最值得珍视的。迄今,这仍为本研究领域中最重要的创获之一。首先,其在《语言起源之商榷》一文中提出了"容态语"与"声感语"等极具深度之说;其次,其《原&q... 就我国20世纪前半叶有关语言起源之研究言,汤炳正先生的成果是最值得珍视的。迄今,这仍为本研究领域中最重要的创获之一。首先,其在《语言起源之商榷》一文中提出了"容态语"与"声感语"等极具深度之说;其次,其《原"名"》一文将语言起源中影响最大之"手势说"往前推进了一大步。然遗憾的是,这一异常珍贵之研究成果,由于种种原因,尚远未得到学术界应有的重视。问题是,就解"语言之起源"这一世界性的难题言,汤先生的研究有着其难以替代的独特之重要贡献。 展开更多
关键词 汤炳正 语言起源研究 容态 声感语 原“名”
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Polymorphism of Exon 3 of MHC Class Ⅱ B Gene in Chinese Alligator(Alligator sinensis)
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作者 刘辉 吴孝兵 +1 位作者 晏鹏 蒋志刚 《Journal of Genetics and Genomics》 SCIE CAS CSCD 北大核心 2007年第10期918-929,共12页
The polymorphism of MHC class II B gene in 14 Chinese alligators was analyzed, which came from three different areas: a wild population from Xuancheng, Anhui, a captive population from Changxing, Zhejiang, and a capt... The polymorphism of MHC class II B gene in 14 Chinese alligators was analyzed, which came from three different areas: a wild population from Xuancheng, Anhui, a captive population from Changxing, Zhejiang, and a captive population from Anhui Research Center for Reproduction of Chinese Alligators. The gene fragment was amplified using a pair of specific primers designed from the MHC gene sequence of the spectacled caiman. A total of 34 sequence haplotypes of exon 3 were detected in the sampled Chinese alligators. The numbers of haplotypes of the 3 Chinese alligator populations were 15, 10, and 9, respectively. The overall estimation of the MHC polymorphism in the Chinese alligator population was higher than those in mammals and in cypdnid fish, The rates of nonsynonymous substitutions (dN) occurred at a significantly lower frequency than that of synonymous substitutions (ds), which were not consistent with the common rule. This result might suggest that the polymorphism of exon 3 seemed not to be maintained by the balancing selection. The neutrality test of Tajima excluded the null hypothesis that the polymorphism of exon 3 was generated by a random drift, and the fact that D = -0.401 indicated an excess of rare mutations in the Chinese alligator. The nucleotide diversity of the sequences and the phylogenetic relations were also analyzed, and the results suggested that there was no significant difference in genetic diversity among the 3 populations of Chinese alligator. 展开更多
关键词 Chinese alligator (Alligator sinensis) major histocompatibility complex (MHC) POLYMORPHISM HAPLOTYPE
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The Landscape Design of Roads Afforestation of Jiangnan New District in Mudanjiang Municipality
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作者 许丽颖 张广通 +3 位作者 黄玉燕 杨明诗 杨晓磊 张隽晟 《Agricultural Science & Technology》 CAS 2014年第7期1209-1212,共4页
Based on road characters in Jiangnan New District in Mudanjiang Municipality,four typical roads were selected to carry out road afforestation design with consideration of local building features and local vegetations,... Based on road characters in Jiangnan New District in Mudanjiang Municipality,four typical roads were selected to carry out road afforestation design with consideration of local building features and local vegetations,in order to integrate both of landscape effects,in terms of improving and beautifying city environment,and of ecological effects,such as filtering air,reducing temperature,increasing humidity,and reducing noise. 展开更多
关键词 Road greening Urban greening Ecological benefit Amenity
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Quantitative Appraisement on Ecological Carrying Capacity in Coastal Rapid Developing Region of Hainan Province 被引量:3
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作者 Zhang Fugang Liu Yansui 《Chinese Journal of Population,Resources and Environment》 北大核心 2008年第2期87-92,共6页
The ecological carrying capacity,an important indica- tor to evaluate the sustainable development of the ecosystem, means the potential ability of the natural ecosystem to carry so- cioeconomic development while the e... The ecological carrying capacity,an important indica- tor to evaluate the sustainable development of the ecosystem, means the potential ability of the natural ecosystem to carry so- cioeconomic development while the ecosystem is healthy.It is limited by the carrying capacity of natural resources and environ- ment and the elasticity of the ecosystem.It will be greatly signifi- cant to study the ecological carrying capacity of Hainan Province, the first ecological province admitted by the State Environmental Protection Administration in China.Not only is the natural eco- system reflected,but also the effects of human activities are em- phasized by integrating the ecosystem health analysis into the ecological carrying capacity research.The research results,using the Factor Analysis tools of software SPSS,indicate that the eco- logical carrying capacity of Hainan Province fluctuated obviously from 1996 to 2005.The level of the ecological carrying capacity of Hainan Province was relatively high in 1996,and reached into trough from 1997 to 1999.It has steadily ascended to be above the middle level since the 21st century.The results also show that policy factors,especially the implementation of the 'Ecological Province' strategy,were important driving forces to influence the ecological carrying capacity.With the population rapidly increas- ing,the land and water resources per capita have decreased quickly.The amount of the ecological carrying capacity was pro- moted remarkably by socioeconomic development especially economic growth and technology applications.All of these will provide useful suggestions to establish and enact regional devel- opment policies,especially for protecting and reconstructing the ecology and environment of Hainan Province. 展开更多
关键词 ecological carrying capacity evaluation driving forces Hainan Province
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Catalytic performance of highly dispersed WO_3 loaded on CeO_2 in the selective catalytic reduction of NO by NH_3 被引量:6
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作者 Lei Zhang Jingfang Sun +3 位作者 Yan Xiong Xiaoqing Zeng Changjin Tang Lin Dong 《Chinese Journal of Catalysis》 CSCD 北大核心 2017年第10期1749-1758,共10页
The influence of tungsten trioxide(WO3)loading on the selective catalytic reduction(SCR)of nitric oxide(NO)by ammonia(NH3)over WO3/cerium dioxide(CeO2)was investigated.The NO conversion first rose and then declined wi... The influence of tungsten trioxide(WO3)loading on the selective catalytic reduction(SCR)of nitric oxide(NO)by ammonia(NH3)over WO3/cerium dioxide(CeO2)was investigated.The NO conversion first rose and then declined with increasing WO3loading.It was found that the crystalline WO3in the1.6WO3/CeO2sample could be removed in25wt%ammonium hydroxide at70°C,which improved the catalytic activity of the sample.The obtained samples were characterized by X‐ray diffraction,Raman spectroscopy,X‐ray photoelectron spectroscopy,hydrogen(H2)temperature programmed reduction,NH3temperature programmed desorption,and in situ diffuse reflectance infrared Fourier transform spectroscopy.The results revealed that the dispersed WO3promoted the catalytic activity of WO3/CeO2while the crystalline WO3inhibited catalytic activity.The oxygen activation of CeO2was inhibited by the coverage of WO3,which weakened NO oxidation and adsorption of nitrate species over WO3/CeO2.In addition,the NH3adsorption performance on CeO2was improved by modification with WO3.NH3was the most stable adsorbed species under NH3SCR reaction conditions.In situ DRIFT spectra suggested that the NH3SCR reaction proceeded via the Eley‐Rideal mechanism over WO3/CeO2.Thus,when the loading of WO3was close to the dispersion capacity,the effects of NH3adsorption and activation were maximized to promote the reaction via the Eley‐Rideal route. 展开更多
关键词 NH3 selective catalytic reduction WO3/CeO2 catalyst WO3 state Dispersion capacity Diffuse reflectance infrared Fourier transform spectroscopy
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Generalization of vdW Type of Equations of State
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作者 云志 史美仁 时钧 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2000年第1期89-91,共3页
The importance of equations of state (EOS) has brought about the proliferation of hundreds of EOS. Nearly all prevailing cubic EOS could be regarded as the results of reforming the original vdW EOS. However, the accur... The importance of equations of state (EOS) has brought about the proliferation of hundreds of EOS. Nearly all prevailing cubic EOS could be regarded as the results of reforming the original vdW EOS. However, the accuracy of the vdW EOS is so low. In view of this, a new general equation is proposed that could be used to value or compare vdW type of EOS, and consequently develop a better vdW type of EOS. 展开更多
关键词 equation of state volume function GENERALIZATION
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Thermodynamic properties and heat capacity of Ru metal in HCP,FCC,BCC and liquid state 被引量:4
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作者 彭红建 周姣连 谢佑卿 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第10期1950-1956,共7页
Isometric heat capacity cv and isobar heat capacity cp of Ru metal in HCP,FCC,BCC and liquid state were calculated by using pure element systematic theory.The results are in good agreement with joint army-navy-air for... Isometric heat capacity cv and isobar heat capacity cp of Ru metal in HCP,FCC,BCC and liquid state were calculated by using pure element systematic theory.The results are in good agreement with joint army-navy-air force(JANAF) experimental value and the calculation result by first-principle(FP) method.But the results have great differences in contrast to Scientific Group Thermodata Europe(SGTE) database.The cause is found that it cannot neglect the electron devotion to heat capacity to adjust cp in one-atom(OA) method.The disparity between OA method and SGTE database was discussed.The main cause is that OA method adopts the crosspoint with iso-Ec-line and iso-a-line in hybritriangle to determine the properties,but SGTE database is obtained by extrapolation from activity measurements and critical assessment of data from a large number of binary system.Thermodynamic properties of Ru metal in HCP,FCC,BCC and liquid state,such as entropy S,enthalpy H and Gibbs energy G were calculated.Therefore,the full description of thermodynamic properties from 0 K to random temperature is implemented. 展开更多
关键词 Ru metal heat capacity thermodynamic property OA method
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On the Possibility of an Isochoric Phase Transition in an Electrostatic Field
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作者 A. A. Sobko 《Journal of Physical Science and Application》 2017年第3期44-46,共3页
In the present paper that considers the possibility for modification of equation of state for a non-polar gas in a closed thermally-insulated capacitor and, consequently, the possibility for changing the temperature a... In the present paper that considers the possibility for modification of equation of state for a non-polar gas in a closed thermally-insulated capacitor and, consequently, the possibility for changing the temperature and pressure under electrostatic field. This can be classified as a new type of phase transitions. 展开更多
关键词 Non-polar gas equation of state generalized equation of Van der Waals-Berthelot phase transition electrostatic field.
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Nonlinear state estimation for fermentation process using cubature Kalman filter to incorporate delayed measurements 被引量:1
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作者 赵利强 王建林 +2 位作者 于涛 陈坤云 刘唐江 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第11期1801-1810,共10页
State estimation of biological process variables directly influences the performance of on-line monitoring and op- timal control for fermentation process. A novel nonlinear state estimation method for fermentation pro... State estimation of biological process variables directly influences the performance of on-line monitoring and op- timal control for fermentation process. A novel nonlinear state estimation method for fermentation process is proposed using cubature Kalman filter (CKF) to incorporate delayed measurements. The square-root version of CI(F (SCKF) algorithm is given and the system with delayed measurements is described. On this basis, the sample-state augmentation method for the SCKF algorithm is provided and the implementation of the proposed algorithm is constructed. Then a nonlinear state space model for fermentation process is established and the SCKF algorithm incorporating delayed measurements based on fermentation process model is presented to implement the nonlinear state estimation. Finally, the proposed nonlinear state estimation methodology is applied to the state estimation for penicillin and industrial yeast fermentation processes. The simulation results show that the on-fine state estimation for fermentation process can be achieved by the proposed method with higher esti- mation accuracy and better stability. 展开更多
关键词 Nonlinear state estimationFermentation processCubature Kalman filterDelayed measurementsSample-state augmentation
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Status of the OECD-SERENA Project for the Resolution of Ex-vessel Steam Explosion Risks 被引量:2
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作者 Seong-Wan Hong Pascal Piluso Matjazu Leskovar 《Journal of Energy and Power Engineering》 2013年第3期423-431,共9页
OECD/NEA (Organization for Economic Cooperation and Development/Nuclear Energy Agency) launched the SERENA (steam explosion resolution for nuclear application) project to resolve internationally the ex-vessel stea... OECD/NEA (Organization for Economic Cooperation and Development/Nuclear Energy Agency) launched the SERENA (steam explosion resolution for nuclear application) project to resolve internationally the ex-vessel steam explosion issue, which is one of major unresolved issues after a TMI-2 (three mile island-2) accident. One of main conclusions of OECD/NEA SERENA Phase 1, which was completed in 2005, was that some damage to the cavity is to be expected for an ex-vessel explosion. One major uncertainty that does not allow for a convergence toward consistent predictions was that there are no data on the component distribution in a pre-mixture at the time of an explosion, especially the level of the void. The other major uncertainty is the explosion behavior of corium melts. Therefore, SERENA Phase 2 was launched on October 1, 2007 to resolve the uncertainties of the coolant void and material effect by performing a limited number of well-designed tests with advanced instrumentation reflecting a large spectrum of ex-vessel melt compositions and conditions, and the required analytical work to bring the code capabilities to a sufficient level for use in reactor case analyses. The recent status of the OECD-SERENA Phase 2 project for the resolution of ex-vessel steam explosion risks will be described. 展开更多
关键词 Steam explosion SERENA corium.
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ERGODIC CAPACITY FORMULA OF MIMO-OFDM SYSTEMS UNDER CORRELATED FREQUENCY SELECTIVE RAYLEIGH FADING CHANNELS
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作者 Pang Jiyong Li Jiandong Zhao Linjing 《Journal of Electronics(China)》 2007年第5期588-592,共5页
An explicit formula for the ergodic capacity of Orthogonal Frequency Division Multiplexing (OFDM)-based Multiple-Input Multiple-Output (MIMO) systems under correlated frequency selective Rayleigh channels is derived,b... An explicit formula for the ergodic capacity of Orthogonal Frequency Division Multiplexing (OFDM)-based Multiple-Input Multiple-Output (MIMO) systems under correlated frequency selective Rayleigh channels is derived,by simplifying the channel response matrix in frequency domain into the so-called Kronecker model composed of three kinds of correlations,i.e.multipath tap gain correlation and spatial fading correlations at both transmitter and receiver.The derived formula is very simple and convenient for one to estimate the effects of all three kinds of correlations on MIMO-OFDM capacity.If taps are independent,there is a very simple expression for the ergodic capacity.In case of tap correlation,the capacity formula could be further given in an integral expression.The validity of the new formula is verified and the effects of correlations,delay spread as well as the number of subcarriers on the ergodic capacity are evaluated via Monte Carlo simulations. 展开更多
关键词 Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing(OFDM) Kronecker product Channel correlation Ergodic capacity
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Novel Operation Mechanism of Capacitorless DRAM Cell Using Impact Ionization and GIDL Effects 被引量:1
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作者 Huibin Tao Jianing Hou Zhibiao Shao 《Computer Technology and Application》 2013年第7期351-355,共5页
A novel operation mechanism of capacitorless SOl-DRAM (silicon on insulator dynamic random access memory) cell using impact ionization and GIDL (gated-induce drain leakage) effects for write "1" operation was pr... A novel operation mechanism of capacitorless SOl-DRAM (silicon on insulator dynamic random access memory) cell using impact ionization and GIDL (gated-induce drain leakage) effects for write "1" operation was proposed. The conventional capacitorless DRAM cell with single charge generating effect is either high speed or low power, while the proposed DG-FinFET (double-gate fin field effect transistor) cell employs the efficient integration of impact ionization and GIDL effects by coupling the front and back gates with optimal body doping profile and proper bias conditions, yielding high speed low power performance. The simulation results demonstrate ideal characteristics in both cell operations and power consumption. Low power consumption is achieved by using GIDL current at 0. luA when the coupling between the front and back gates restrains the impact ionization current in the first phase. The write operation of the cell is within Ins attributed to significant current of the impact ionization effect in the second phase. By shortening second phase, power consumption could be further decreased. The ratio of read "1" and read "0" current is more than 9.38E5. Moreover, the cell has great retention characteristics. 展开更多
关键词 DRAM CELL IONIZATION GIDL effects.
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Influence of seismic input on response of Baihetan arch dam 被引量:3
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作者 徐强 陈健云 +1 位作者 李静 赵春风 《Journal of Central South University》 SCIE EI CAS 2014年第6期2437-2443,共7页
The dynamic responses of the arch dam including dam-foundation-storage capacity of water system,using two different earthquake input models,i.e.viscous-spring artificial boundary(AB)condition and massless foundation(M... The dynamic responses of the arch dam including dam-foundation-storage capacity of water system,using two different earthquake input models,i.e.viscous-spring artificial boundary(AB)condition and massless foundation(MF),were studied and analyzed for the 269 m high Baihetan arch dam under construction in China.By using different input models,the stress and opening of contraction joints(OCJs)of arch dam under strong shock were taken into consideration.The results show that the earthquake input models have slight influence on the responses including earthquake stresses and openings of contraction joints in different extents. 展开更多
关键词 seismic input openings of contraction joints massless foundation model viscous-spring artificial boundary condition arch dam
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Freedom of Speech and Newspaper Excesses
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作者 Amira Massaabi 《Sociology Study》 2014年第8期681-690,共10页
Press has been found to have an impact on the outcome of electoral political campaigns. Press can distort the electorate's perception of an objective reality to fulfill the political orientation of its editorial line... Press has been found to have an impact on the outcome of electoral political campaigns. Press can distort the electorate's perception of an objective reality to fulfill the political orientation of its editorial line. This can be achieved in propaganda and in the rhetoric of excess. Within the framework of Critical Discourse Analysis (CDA), this paper has conducted a thematic content analysis to study the rhetoric of excess in the construction of political identity and relations in 100 articles pertaining to two different ideologically oriented Tunisian newspapers, namely Le Maghreb and El Dhamir. The study covered the period from December 26, 2011 to December 26, 2012. Results have shown a low level of impartiality violating Gricean maxims of quality and quantity. This tendency could culminate in violence and undermine the public's confidence in the media. Proactive measures of media management are recommended. 展开更多
关键词 Critical Discourse Analysis (CDA) media freedom and ethics the rhetoric of excess political identity IDEOLOGY
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Stuck with the Sur-face: An Ethical Approach to Facial Disfigurement in Willa Cather's "The Profile"
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作者 Gudrun M. Grabher 《Journal of Philosophy Study》 2016年第3期131-138,共8页
The human face consists of three dimensions: (1) the visible, static sur-face, (2) the mobile dimension, which communicates thoughts, emotions, and states of mind, and (3) the invisible dimension, the face aspa... The human face consists of three dimensions: (1) the visible, static sur-face, (2) the mobile dimension, which communicates thoughts, emotions, and states of mind, and (3) the invisible dimension, the face aspars-pro-toto for the whole person who owns the face. In this latter sense, the human face is at the center of Emmanuel Levinas' theory of ethics: We encounter each other face-to-face, he argues, and it is the other's face that calls for my ethical response to the holiness of his/her wholeness and essence. The primary ethical imperative is: "Thou shalt not kill." When we encounter a facially disfigured person, we usually fail to respond ethically because we concentrate on the disfigurement. The second dimension, as a result of the disfigurement, is often impaired and thus incapable of communicating in such a way that we can "read" the face. With our gaze fixed on the disfigured part of the face, we lose sight of the person as a whole. Metaphorically speaking, we could even say that we "kill" the person. Levinas conceives of the other's face not in its plastic manifestation. But the encounter with the other does at first take place as embodiment. According to Merleau-Ponty, this encounter is by definition interactive and dialogical. In Willa Cather's short story "The Profile," young beautiful Virginia marries a portrait painter after he has finished her portrait in profile. The left side of her face is severely disfigured because of a burn. Her husband is waiting impatiently for her to talk about "it" and the suffering it must cause her in order to "heal" her with his love, but she behaves as if it did not exist and even likes to dress extravagantly. In the following analysis of the short story, it will be illustrated how the husband fails to respond to his wife's face's invitation to interact with it and get in touch with the wholeness of her person that it stands for. Instead, he reduces her to the disfigurement. When he finally names the scar, he metaphorically "kills" her, as well as their marriage. 展开更多
关键词 the human face facial disfigurement ethics of the face (E. Levinas) phenomenology (Merleau-Ponty) lived embodiment the visual arts Victor Hugo
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nvestigation of Structural Steel Webs for Punching Shear
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作者 Mustafa Mahamid Adeeb Rahman 《Journal of Civil Engineering and Architecture》 2015年第9期1126-1136,共11页
Shear tab connections or simple connections are widely used in structural steel structures. There are several limit states associated with these connections such bolt shear, bolt bearing, block shear, shear yielding a... Shear tab connections or simple connections are widely used in structural steel structures. There are several limit states associated with these connections such bolt shear, bolt bearing, block shear, shear yielding and shear rupture. A modified version of the shear tab has been developed during the last decade, which is extended shear tab connections. In developing design provisions for the extended shear tab connections, experimental work showed that there are additional limit states other than those mentioned above that limit the capacity of the extended shear connection. Extended shear tab connections could be used to frame beam-to-column or beam-to-girder. In the case where a beam is framed into girder, a new limit state develops in the web of the supporting girder. This limit state is punching shear of the supporting girder web which is due to a higher moment. The higher moment in extended shear tab connections is due to the larger moment arm (eccentricity) from the bolt line, the location of the shear force, to the support, which is in this case the girder's web. This study investigates the supporting girder web using experimental work, finite element analysis, and yield line theory. This paper shows the result of this investigation and proposes an evaluation of the web capacity equation which should be used when calculating the beam-to-girder connection capacity. 展开更多
关键词 Steel connections extended shear tab punching shear yield line beam web limit states
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A Note on Nonclassical Symmetries of a Class of Nonlinear Partial Differential Equations and Compatibility 被引量:2
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作者 WAN Wen-Tao CHEN Yong 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第9期398-402,共5页
The nonclassical symmetries of a class of nonlinear partial differential equations obtained by the compatibility method is investigated. We show the nonclassicaJ symmetries obtained in [J. Math. Anal. Appl. 289 (2004... The nonclassical symmetries of a class of nonlinear partial differential equations obtained by the compatibility method is investigated. We show the nonclassicaJ symmetries obtained in [J. Math. Anal. Appl. 289 (2004) 55, J. Math. Anal. Appl. 311 (2005) 479] are not all the nonclassical symmetries. Based on a new assume on the form of invariant surface condition, all the nonclassical symmetries for a class of nonlinear partial differential equations can be obtained through the compatibility method. The nonlinear Klein-Gordon equation and the Cahn-Hilliard equations all serve as examples showing the compatibility method leads quickly and easily to the determining equations for their all nonclassical symmetries for two equations. 展开更多
关键词 nonclassical symmetries compatibility determining equations nonlinear Klein Gordon equation Cahn Hilliard equations
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Utility-optimization dynamic subcarrier allocation algorithm for SC-FDMA systems
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作者 李一兵 Zhang Xu Ye Fang 《High Technology Letters》 EI CAS 2014年第1期1-8,共8页
Two utility-optimization dynamic subcarrier allocation(DSA) algorithms are designed for single carrier frequency division multiple access system(SC-FDMA).The two proposed algorithms aim to support diverse transmission... Two utility-optimization dynamic subcarrier allocation(DSA) algorithms are designed for single carrier frequency division multiple access system(SC-FDMA).The two proposed algorithms aim to support diverse transmission capacity requirements in wireless networks,which consider both the channel state information(CSI) and the capacity requirements of each user by setting appropriate utility functions.Simulation results show that with considerable lower computational complexity,the first utility-optimization algorithm can meet the system capacity requirements of each user effectively.However,the rate-sum capacity performance is poor.Furthermore,the second proposed utility-optimization algorithm can contribute a better trade-off between system rate-sum capacity requirement and the capacity requirements of each user by introducing the signal to noise ratio(SNR) information to the utility function based on the first utility-optimization algorithm,which can improve the user requirements processing capability as well as achieve a better sum-rate capacity. 展开更多
关键词 single carrier frequency division multiple access (SC-FDMA) dynamic subcarri-er allocation (DSA) utility function transmission capacity requirements utility-optimization algo-rithm greedy algorithm proportional fair algorithm
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