Mark Twain, the founder of critical realism in the United States, is a famous master of short story in the world. He experienced the process from American liberal capitalism to imperialism. The writing style is also c...Mark Twain, the founder of critical realism in the United States, is a famous master of short story in the world. He experienced the process from American liberal capitalism to imperialism. The writing style is also changed from funny to pessimistic. His works have been translated into many languages and highly praised by readers and media all over the word. One of his novels, the classic novel The Man that Corrupted Hedlyburg by Mark Twain. Its plot is designable and the description of psychology is profound. It is known as the treasure of Mark Twain's works. Various literary critical analyses on this story have been made from different perspectives; however, there is no complete and thorough analysis on it from the perspective of corpus-based stylistics.In order to achieve this target, an observed corpus and a reference corpus are both built. The observed corpus is the electronic text of The Man while the reference corpus consists of four electronic texts of Mark Twain. In this research, three softwares, AntConc,WordSmith Tools and UAM CorpusTool, are applied. This thesis conducts a systemic stylistics analysis to the corpus-based approach of The Man That Corrupted Hadlyburg at three levels, lexical level, syntactic level, discourse level. At last it summarizes theprevious study and points out the main purpose of the thesis. And in the meantime, the limitation exists in the thesis and the suggestions for the subsequent exploration are also concluded. It is hoped that this study will help English learners to better understand and appreciate the meaning and aesthetic value of the text.展开更多
In the English language, there are many words which are considered synonymous in that dictionaries and thesauruses often define them in identical meanings. Under such circumstances, EFL learners are confronted with a ...In the English language, there are many words which are considered synonymous in that dictionaries and thesauruses often define them in identical meanings. Under such circumstances, EFL learners are confronted with a big difficulty in acquiring these words of similar meanings. They often regard synonymous words as equivalents and use them alternately, which sometimes result in ambiguity or awkwardness of their language. However, with the advent of corpora and concordancing programs, a new way of investigating and learning English synonymous words has emerged. This paper explores colligational patterns, collocational behavior and semantic prosody of two seemingly synonymous verbs, gain and obtain, in two native speaker corpora, the Brown Corpus and the LOB Corpus, in order to show how these 'equivalencies' can be misleading because 'synonymous' words are typically used in different ways. The study also examines EFL learners' behavior in using synonymous words by investigating the Chinese Learner English Corpus (CLEC). From the results of the study, it can be seen that Chinese EFL learners have not yet acquired a full understanding of the usage of gain and obtain with respect to colligation, collocation and semantic prosody. Their underuses and overuses of some grammatical forms and lexical patterns of the two target synonymous words might be influenced either by their mother tongue or by the registers of their English writing or by both. The paper finally discusses the implications of corpus-based study in vocabulary teaching and learning in general.展开更多
Insufficient vocabulary has become a barrier to reading comprehension and translation in the process of ME (medical English) study to the third-year students at medical universities or colleges. The current study was ...Insufficient vocabulary has become a barrier to reading comprehension and translation in the process of ME (medical English) study to the third-year students at medical universities or colleges. The current study was designed to investigate corpus-based teaching ap-proach to enlarging students'vocabulary in the course of higher learning of ML (medical literature). The study was carried out from 2006.9 to 2008.9 among third-year medical students in our college. Students were encouraged to augment their vocabulary by active practice,intensive learning,and comprehensive learning respectively through discovering study by using self-made ME corpuses (90,000 words). In doing so,their vocabulary was enlarged by actively using the essential vocabulary,attaching more attention to the difficult technical vocabulary,and getting familiar with medical terms,which eliminated their language barrier,improved their integrated language proficiency,and developed their sense of achievement.展开更多
The usage characteristics of the large numerals in child language reflects both linguistic and cognitive development.The present study systematically examined Mandarin children’s naturalistic use of large numerals“...The usage characteristics of the large numerals in child language reflects both linguistic and cognitive development.The present study systematically examined Mandarin children’s naturalistic use of large numerals“bai”,“qian”,and“wan”and compared it with adult usage patterns based on a self-constructed corpus.The results revealed a significant preference for the use of“bai”over both“qian”and“wan”among children and adults alike.This shared pattern suggests that children’s acquisition of large numerals is strongly shaped by adult language input.This study addresses a critical gap in research on the acquisition of large numerals by Mandarin-speaking children,providing valuable insights for the broader theoretical framework of cross-linguistic numerical cognition.展开更多
BACKGROUND Due to the increasing rate of thyroid nodules diagnosis,and the desire to avoid the unsightly cervical scar,remote thyroidectomies were invented and are increasingly performed.Transoral endoscopic thyroidec...BACKGROUND Due to the increasing rate of thyroid nodules diagnosis,and the desire to avoid the unsightly cervical scar,remote thyroidectomies were invented and are increasingly performed.Transoral endoscopic thyroidectomy vestibular approach and trans-areolar approaches(TAA)are the two most commonly used remote approaches.No previous meta-analysis has compared postoperative infections and swallowing difficulties among the two procedures.AIM To compared the same among patients undergoing lobectomy for unilateral thyroid carcinoma/benign thyroid nodule.METHODS We searched PubMed MEDLINE,Google Scholar,and Cochrane Library from the date of the first published article up to August 2025.The term used were transoral thyroidectomy vestibular approach,trans areolar thyroidectomy,scarless thyroidectomy,remote thyroidectomy,infections,postoperative,inflammation,dysphagia,and swallowing difficulties.We identified 130 studies,of them,30 full texts were screened and only six studies were included in the final meta-analysis.RESULTS Postoperative infections were not different between the two approaches,odd ratio=1.33,95%confidence interval:0.50-3.53,theχ2 was 1.92 and the P-value for overall effect of 0.57.Similarly,transient swallowing difficulty was not different between the two forms of surgery,with odd ratio=0.91,95%confidence interval:0.35-2.40;theχ2 was 1.32,and the P-value for overall effect of 0.85.CONCLUSION No significant statistical differences were evident between trans-oral endoscopic Mirghani H.Infections and swallowing difficulty in scarless thyroidectomy WJCC https://www.wjgnet.com 2 January 6,2026 Volume 14 Issue 1 thyroidectomy vestibular approach and trans-areolar approach regarding postoperative infection and transient swallowing difficulties.Further longer randomized trials are needed.展开更多
The photoacoustic imaging of lipid is intrinsically constrained by the feeble nature of endogenous lipid signals,posing a persistent sensitivity challenge that demands innovative solutions.Although adopting high-effic...The photoacoustic imaging of lipid is intrinsically constrained by the feeble nature of endogenous lipid signals,posing a persistent sensitivity challenge that demands innovative solutions.Although adopting high-efficiency excitation and detection elements may improve the imaging sensitivity to a certain extent,the application of the elements is inevitably subject to various limitations in practical applications,particularly during in vivo imaging and endoscopic imaging.In this study,we propose a multi-combinatorial approach to enhance the sensitivity of lipid photoacoustic imaging.The approach involves wavelet transform processing of one-dimensional A-line signals,gradient-based denoising of two-dimensional B-scan images,and finally,threedimensional spatial weighted averaging of the data processed by the previous two steps.This method not only significantly improves the signal-to-noise ratio(SNR)in distinguished feature regions of the image by around 10 dB,but also efficiently extracts weak signals with no distinct features in the original image.After processing with this method,the images acquired under single scanning were compared with those obtained under multiple scanning.The results showed highly consistent image features,with the structural similarity index increasing from 0.2 to 0.8,confirming the accuracy and reliability of the multi-combinatorial approach.展开更多
With the rapid development of intelligent navigation technology,efficient and safe path planning for mobile robots has become a core requirement.To address the challenges of complex dynamic environments,this paper pro...With the rapid development of intelligent navigation technology,efficient and safe path planning for mobile robots has become a core requirement.To address the challenges of complex dynamic environments,this paper proposes an intelligent path planning framework based on grid map modeling.First,an improved Safe and Smooth A*(SSA*)algorithm is employed for global path planning.By incorporating obstacle expansion and cornerpoint optimization,the proposed SSA*enhances the safety and smoothness of the planned path.Then,a Partitioned Dynamic Window Approach(PDWA)is integrated for local planning,which is triggered when dynamic or sudden static obstacles appear,enabling real-time obstacle avoidance and path adjustment.A unified objective function is constructed,considering path length,safety,and smoothness comprehensively.Multiple simulation experiments are conducted on typical port grid maps.The results demonstrate that the improved SSA*significantly reduces the number of expanded nodes and computation time in static environmentswhile generating smoother and safer paths.Meanwhile,the PDWA exhibits strong real-time performance and robustness in dynamic scenarios,achieving shorter paths and lower planning times compared to other graph search algorithms.The proposedmethodmaintains stable performance across maps of different scales and various port scenarios,verifying its practicality and potential for wider application.展开更多
The 17 Sustainable Development Goals(SDGs)for 2030,adopted by all United Nations member states in 2015,are facing a range of challenges.Factors such as climate change,regional conflicts and economic recession are havi...The 17 Sustainable Development Goals(SDGs)for 2030,adopted by all United Nations member states in 2015,are facing a range of challenges.Factors such as climate change,regional conflicts and economic recession are having a significant impact,particularly on global poverty governance.As a platform for dialogue,exchange and technical cooperation,the 2025 International Seminar on Global Poverty Reduction Partnerships was held in Beijing on 10 December 2025.展开更多
The rapid identification of γ-emitting radionuclides with low activity levels in public areas is crucial for nuclear safety.However,classical methods rely on full-energy peaks in the integral spectrum,requiring suffi...The rapid identification of γ-emitting radionuclides with low activity levels in public areas is crucial for nuclear safety.However,classical methods rely on full-energy peaks in the integral spectrum,requiring sufficient count accumulation for evaluation,thereby limiting response time.The sequential Bayesian approach,which utilizes prior information and considers both photon energies and interarrival times,can significantly enhance the performance of radionuclides identification.This study proposes a theoretical optimization method for the traditional sequential Bayesian approach.Each photon is processed sequentially,and the corresponding posterior probability is updated in real time using a noninformative prior from the Bayesian theory.By comparing the posterior probabilities of the background and radionuclides based on the energy variance and time interval,the type of γ-rays can be identified(background characteristic γ-rays,Compton plateaus γ-rays,or radionuclide-specific characteristic γ-rays).By integrating the information from these multiple characteristic γ-rays,the presence and type of radionuclides were determined based on the final decision function and a set threshold.Based on theoretical research,verification experiments were conducted using a LaBr_(3)(Ce)detector in both low-and natural background radiation environments with typical radionuclides(^(137)Cs,^(60)Co,and ^(133)Ba).The results show that this approach can identify ^(137)Cs in 7.9 s and 8.5 s(source dose rate contribution:approximately 6.5×10^(−3)μGy/h),^(60)Co in 8.1 s and 9.8 s(approximately 4.8×10^(−2)μGy/h),and ^(133)Ba in 4.05 s and 5.99 s(approximately 3.4×10^(−2)μGy/h)under low and natural background radiation,respectively,with a miss rate below 0.01%.This demonstrates the effectiveness of the proposed approach for fast radionuclides identification,even at low activity levels and highlights its potential for enhancing public safety in diverse radiation environments.展开更多
The use of "however" by Chinese learners' writing is studied through a comparison of its use in CLEC and in BROWN and found that "however" is overused in the front of a sentence,underused in th...The use of "however" by Chinese learners' writing is studied through a comparison of its use in CLEC and in BROWN and found that "however" is overused in the front of a sentence,underused in the middle of a sentence and misused as a disjunctive conjunction,as is followed by the analysis of three attributable factors,i.e.the writing style,confusion with "but" and negative L1 transfer.展开更多
This paper is a corpus-based study which aims at analyzing lexical features of English tour commentary and creating a keyword list as teaching material.
Shlesinger (1998) first proposed that corpus-based interpreting studies(CIS) should be regarded as an offshoot of corpus-based translation studies (CTS).In China, owing to the development and compilation of interpreti...Shlesinger (1998) first proposed that corpus-based interpreting studies(CIS) should be regarded as an offshoot of corpus-based translation studies (CTS).In China, owing to the development and compilation of interpreting corpora, CIShas gained momentum since 2007. To review the past achievements in this regard,the present paper first summarizes four readily compiled interpreting corpora. Then,based on the China National Knowledge Infrastructure (CKNI), it conducts thestatistics mainly on relevant published papers in Chinese Social Science and Index(CSSCI) journals. Next, it pinpoints a bibliometric analysis on the data by taking intoaccount three parameters, namely, H index, reference citation and their distribution.Then, it makes a detailed review and comments on the background of CIS and itsparadigm, theoretical interpretation of CIS and the research areas of CIS, standardsof developing interpreting corpora and solutions to difficulties in compilation ofinterpreting corpora, research orientations including topics and objects. At present,although CIS have attained preliminary findings and conclusions, it has mainly reliedon the theoretical and analytical frameworks of Systemic Functional Grammar andits utility in CIS, given the fact that it has introduced few interdisciplinary studies.As a result, CIS do not take full advantage of the paradigm of corpus linguistics norexplore into such research topics as features of interpretation, interpreters’ identitiesand interpreting styles. Finally, regarding future studies, the paper proposes that CISshould foreground the relevance of improving the mechanism of interpreting corpuscompilation in order to gain ground in new research methods and perspectives.展开更多
The present study chooses Li Sao,one of the representatives of traditional Chinese Chu culture,as the research subject.Through establishing two small monolingual corpora,a comparative analysis of Yang Xianyi’s transl...The present study chooses Li Sao,one of the representatives of traditional Chinese Chu culture,as the research subject.Through establishing two small monolingual corpora,a comparative analysis of Yang Xianyi’s translation and David Hawkes’translation was made from the perspective of translation universals on three levels,namely lexical level,syntactic level and textual level.The results show that two translations both reflect the translation universals to some extent,but Hawkes’translation is more consistent with the translation universals in comparison with Yang Xianyi’s on the whole.展开更多
Educational discourses,or to be more specific,universities’introductory discourses have not been studied from the contrastive perspective using critical genre analysis theories.This study uses Fairclough’s framework...Educational discourses,or to be more specific,universities’introductory discourses have not been studied from the contrastive perspective using critical genre analysis theories.This study uses Fairclough’s framework of discourse analysis to take a corpus-based contrastive study between the Chinese and global universities’introductory discourses from three aspects.Firstly,the textual dimension will be explored using the corpus-based approach.Secondly,it studies from the discursive dimension from intertextuality and interdiscursivity.Finally,the social cultural perspective study will be given about the corresponding social cultural interpretation on the differences between Chinese and global universities’introduction discourses.展开更多
Both the study of metaphor and translation has taken an empirical turn in the past decade,corpus-based method has provided a practical and objective way for investigating metaphor translation from a comparative and co...Both the study of metaphor and translation has taken an empirical turn in the past decade,corpus-based method has provided a practical and objective way for investigating metaphor translation from a comparative and cognitive perspective.The purpose of this paper is to reveal the cognitive differences in the perception of“root”between English and Chinese through a contrastive analysis of the two English translations of a Chinese classic novel—Dream of the Red Mansion,the two translations are completed by a native Chinese speaker and a native English speaker respectively.The study is divided into two parts,the first part is devoted to a contrastive analysis of typical examples selected from the data acquired from the online English-Chinese parallel corpus with the online corpus analysis tool Wmatrix,two deductions have been drawn through the analysis concerning the cognition difference in root perception:(1)the integral perception of root and a plant in Chinese VS the binary cognition in English;(2)the concreteness of“root”metaphor in Chinese VS the abstractness in“root”metaphor application in English.Then the two deductions are further demonstrated through corpus-assisted study of“root”metaphor in large online corpuses.The differences in root metaphor usage as well as the cognitive reasons behind the differences have been investigated with emphasis not only on the dominant conceptual root metaphors,but also the semantic preference of the collocated words of the metaphors.展开更多
This study compared and analyzed the features of keywords and their collocations in corpora:Chinese Government Work Reports and State of the Union(USA).A further comparison and analysis of the collocations of“develop...This study compared and analyzed the features of keywords and their collocations in corpora:Chinese Government Work Reports and State of the Union(USA).A further comparison and analysis of the collocations of“develop”and“improve”was then conducted from the perspective of political linguistics.Results suggested that China and the United States have their own emphasis of government work.It was also indicated that“we”and“will”are both high-frequency keywords and combinations of“develop”and“improve”,which shows that both countries give the highest priority to narrowing the distance between the government and the public.展开更多
Audio description(AD),unlike interlingual translation and interpretation,is subject to unique constraints as a spoken text.Facilitated by AD,educational videos on COVID-19 anti-virus measures are made accessible to th...Audio description(AD),unlike interlingual translation and interpretation,is subject to unique constraints as a spoken text.Facilitated by AD,educational videos on COVID-19 anti-virus measures are made accessible to the visually disadvantaged.In this study,a corpus of AD of COVID-19 educational videos is developed,named“Audio Description Corpus of COVID-19 Educational Videos”(ADCCEV).Drawing on the model of Textual and Linguistic Audio Description Matrix(TLADM),this paper aims to identify the linguistic and textual idiosyncrasies of AD themed on COVID-19 response released by the New Zealand Government.This study finds that linguistically,the AD script uses a mix of complete sentences and phrases,the majority being in Present Simple tense.Present participles and the“with”structure are used for brevity.Vocabulary is diverse,with simpler words for animated explainers.Third-person pronouns are common in educational videos.Color words are a salient feature of AD,where“yellow”denotes urgency,and“red”indicates importance,negativity,and hostility.On textual idiosyncrasies,coherence is achieved through intermodal components that align with the video’s mood and style.AD style varies depending on the video’s purpose,from informative to narrative or expressive.展开更多
文摘Mark Twain, the founder of critical realism in the United States, is a famous master of short story in the world. He experienced the process from American liberal capitalism to imperialism. The writing style is also changed from funny to pessimistic. His works have been translated into many languages and highly praised by readers and media all over the word. One of his novels, the classic novel The Man that Corrupted Hedlyburg by Mark Twain. Its plot is designable and the description of psychology is profound. It is known as the treasure of Mark Twain's works. Various literary critical analyses on this story have been made from different perspectives; however, there is no complete and thorough analysis on it from the perspective of corpus-based stylistics.In order to achieve this target, an observed corpus and a reference corpus are both built. The observed corpus is the electronic text of The Man while the reference corpus consists of four electronic texts of Mark Twain. In this research, three softwares, AntConc,WordSmith Tools and UAM CorpusTool, are applied. This thesis conducts a systemic stylistics analysis to the corpus-based approach of The Man That Corrupted Hadlyburg at three levels, lexical level, syntactic level, discourse level. At last it summarizes theprevious study and points out the main purpose of the thesis. And in the meantime, the limitation exists in the thesis and the suggestions for the subsequent exploration are also concluded. It is hoped that this study will help English learners to better understand and appreciate the meaning and aesthetic value of the text.
文摘In the English language, there are many words which are considered synonymous in that dictionaries and thesauruses often define them in identical meanings. Under such circumstances, EFL learners are confronted with a big difficulty in acquiring these words of similar meanings. They often regard synonymous words as equivalents and use them alternately, which sometimes result in ambiguity or awkwardness of their language. However, with the advent of corpora and concordancing programs, a new way of investigating and learning English synonymous words has emerged. This paper explores colligational patterns, collocational behavior and semantic prosody of two seemingly synonymous verbs, gain and obtain, in two native speaker corpora, the Brown Corpus and the LOB Corpus, in order to show how these 'equivalencies' can be misleading because 'synonymous' words are typically used in different ways. The study also examines EFL learners' behavior in using synonymous words by investigating the Chinese Learner English Corpus (CLEC). From the results of the study, it can be seen that Chinese EFL learners have not yet acquired a full understanding of the usage of gain and obtain with respect to colligation, collocation and semantic prosody. Their underuses and overuses of some grammatical forms and lexical patterns of the two target synonymous words might be influenced either by their mother tongue or by the registers of their English writing or by both. The paper finally discusses the implications of corpus-based study in vocabulary teaching and learning in general.
文摘Insufficient vocabulary has become a barrier to reading comprehension and translation in the process of ME (medical English) study to the third-year students at medical universities or colleges. The current study was designed to investigate corpus-based teaching ap-proach to enlarging students'vocabulary in the course of higher learning of ML (medical literature). The study was carried out from 2006.9 to 2008.9 among third-year medical students in our college. Students were encouraged to augment their vocabulary by active practice,intensive learning,and comprehensive learning respectively through discovering study by using self-made ME corpuses (90,000 words). In doing so,their vocabulary was enlarged by actively using the essential vocabulary,attaching more attention to the difficult technical vocabulary,and getting familiar with medical terms,which eliminated their language barrier,improved their integrated language proficiency,and developed their sense of achievement.
文摘The usage characteristics of the large numerals in child language reflects both linguistic and cognitive development.The present study systematically examined Mandarin children’s naturalistic use of large numerals“bai”,“qian”,and“wan”and compared it with adult usage patterns based on a self-constructed corpus.The results revealed a significant preference for the use of“bai”over both“qian”and“wan”among children and adults alike.This shared pattern suggests that children’s acquisition of large numerals is strongly shaped by adult language input.This study addresses a critical gap in research on the acquisition of large numerals by Mandarin-speaking children,providing valuable insights for the broader theoretical framework of cross-linguistic numerical cognition.
文摘BACKGROUND Due to the increasing rate of thyroid nodules diagnosis,and the desire to avoid the unsightly cervical scar,remote thyroidectomies were invented and are increasingly performed.Transoral endoscopic thyroidectomy vestibular approach and trans-areolar approaches(TAA)are the two most commonly used remote approaches.No previous meta-analysis has compared postoperative infections and swallowing difficulties among the two procedures.AIM To compared the same among patients undergoing lobectomy for unilateral thyroid carcinoma/benign thyroid nodule.METHODS We searched PubMed MEDLINE,Google Scholar,and Cochrane Library from the date of the first published article up to August 2025.The term used were transoral thyroidectomy vestibular approach,trans areolar thyroidectomy,scarless thyroidectomy,remote thyroidectomy,infections,postoperative,inflammation,dysphagia,and swallowing difficulties.We identified 130 studies,of them,30 full texts were screened and only six studies were included in the final meta-analysis.RESULTS Postoperative infections were not different between the two approaches,odd ratio=1.33,95%confidence interval:0.50-3.53,theχ2 was 1.92 and the P-value for overall effect of 0.57.Similarly,transient swallowing difficulty was not different between the two forms of surgery,with odd ratio=0.91,95%confidence interval:0.35-2.40;theχ2 was 1.32,and the P-value for overall effect of 0.85.CONCLUSION No significant statistical differences were evident between trans-oral endoscopic Mirghani H.Infections and swallowing difficulty in scarless thyroidectomy WJCC https://www.wjgnet.com 2 January 6,2026 Volume 14 Issue 1 thyroidectomy vestibular approach and trans-areolar approach regarding postoperative infection and transient swallowing difficulties.Further longer randomized trials are needed.
基金supported by the National Key Research and Development Program of China(2022YFC2402400)the National Natural Science Foundation of China(82027803,62275062)+7 种基金the Guangdong Provincial Key Laboratory of Biomedical Optical Imaging Technology(2020B121201010)the Shenzhen Science and Technology Innovation Committee under Grant(JCYJ20220818101417039)the Shenzhen Key Laboratory for Molecular lmaging(ZDSY20130401165820357)the Shenzhen Medical Research Fund(D2404002)the Project of Shandong Innovation and Startup Community of High-end Medical Apparatus and Instruments(2023-SGTTXM-002 and 2024-SGTTXM-005)the Shandong Province Technology Innovation Guidance Plan(Central Leading Local Science and Technology Development Fund)(YDZX2023115)the Taishan Scholar Special Funding Project of Shandong Provinceand the Shandong Laboratory of Advanced Biomaterials and Medical Devices in Weihai(ZL202402).
文摘The photoacoustic imaging of lipid is intrinsically constrained by the feeble nature of endogenous lipid signals,posing a persistent sensitivity challenge that demands innovative solutions.Although adopting high-efficiency excitation and detection elements may improve the imaging sensitivity to a certain extent,the application of the elements is inevitably subject to various limitations in practical applications,particularly during in vivo imaging and endoscopic imaging.In this study,we propose a multi-combinatorial approach to enhance the sensitivity of lipid photoacoustic imaging.The approach involves wavelet transform processing of one-dimensional A-line signals,gradient-based denoising of two-dimensional B-scan images,and finally,threedimensional spatial weighted averaging of the data processed by the previous two steps.This method not only significantly improves the signal-to-noise ratio(SNR)in distinguished feature regions of the image by around 10 dB,but also efficiently extracts weak signals with no distinct features in the original image.After processing with this method,the images acquired under single scanning were compared with those obtained under multiple scanning.The results showed highly consistent image features,with the structural similarity index increasing from 0.2 to 0.8,confirming the accuracy and reliability of the multi-combinatorial approach.
文摘With the rapid development of intelligent navigation technology,efficient and safe path planning for mobile robots has become a core requirement.To address the challenges of complex dynamic environments,this paper proposes an intelligent path planning framework based on grid map modeling.First,an improved Safe and Smooth A*(SSA*)algorithm is employed for global path planning.By incorporating obstacle expansion and cornerpoint optimization,the proposed SSA*enhances the safety and smoothness of the planned path.Then,a Partitioned Dynamic Window Approach(PDWA)is integrated for local planning,which is triggered when dynamic or sudden static obstacles appear,enabling real-time obstacle avoidance and path adjustment.A unified objective function is constructed,considering path length,safety,and smoothness comprehensively.Multiple simulation experiments are conducted on typical port grid maps.The results demonstrate that the improved SSA*significantly reduces the number of expanded nodes and computation time in static environmentswhile generating smoother and safer paths.Meanwhile,the PDWA exhibits strong real-time performance and robustness in dynamic scenarios,achieving shorter paths and lower planning times compared to other graph search algorithms.The proposedmethodmaintains stable performance across maps of different scales and various port scenarios,verifying its practicality and potential for wider application.
文摘The 17 Sustainable Development Goals(SDGs)for 2030,adopted by all United Nations member states in 2015,are facing a range of challenges.Factors such as climate change,regional conflicts and economic recession are having a significant impact,particularly on global poverty governance.As a platform for dialogue,exchange and technical cooperation,the 2025 International Seminar on Global Poverty Reduction Partnerships was held in Beijing on 10 December 2025.
基金supported by the Program for NIM-Basic Research Business Expenses Key Field Program,China(No.AKYCX2315).
文摘The rapid identification of γ-emitting radionuclides with low activity levels in public areas is crucial for nuclear safety.However,classical methods rely on full-energy peaks in the integral spectrum,requiring sufficient count accumulation for evaluation,thereby limiting response time.The sequential Bayesian approach,which utilizes prior information and considers both photon energies and interarrival times,can significantly enhance the performance of radionuclides identification.This study proposes a theoretical optimization method for the traditional sequential Bayesian approach.Each photon is processed sequentially,and the corresponding posterior probability is updated in real time using a noninformative prior from the Bayesian theory.By comparing the posterior probabilities of the background and radionuclides based on the energy variance and time interval,the type of γ-rays can be identified(background characteristic γ-rays,Compton plateaus γ-rays,or radionuclide-specific characteristic γ-rays).By integrating the information from these multiple characteristic γ-rays,the presence and type of radionuclides were determined based on the final decision function and a set threshold.Based on theoretical research,verification experiments were conducted using a LaBr_(3)(Ce)detector in both low-and natural background radiation environments with typical radionuclides(^(137)Cs,^(60)Co,and ^(133)Ba).The results show that this approach can identify ^(137)Cs in 7.9 s and 8.5 s(source dose rate contribution:approximately 6.5×10^(−3)μGy/h),^(60)Co in 8.1 s and 9.8 s(approximately 4.8×10^(−2)μGy/h),and ^(133)Ba in 4.05 s and 5.99 s(approximately 3.4×10^(−2)μGy/h)under low and natural background radiation,respectively,with a miss rate below 0.01%.This demonstrates the effectiveness of the proposed approach for fast radionuclides identification,even at low activity levels and highlights its potential for enhancing public safety in diverse radiation environments.
文摘The use of "however" by Chinese learners' writing is studied through a comparison of its use in CLEC and in BROWN and found that "however" is overused in the front of a sentence,underused in the middle of a sentence and misused as a disjunctive conjunction,as is followed by the analysis of three attributable factors,i.e.the writing style,confusion with "but" and negative L1 transfer.
文摘This paper is a corpus-based study which aims at analyzing lexical features of English tour commentary and creating a keyword list as teaching material.
文摘Shlesinger (1998) first proposed that corpus-based interpreting studies(CIS) should be regarded as an offshoot of corpus-based translation studies (CTS).In China, owing to the development and compilation of interpreting corpora, CIShas gained momentum since 2007. To review the past achievements in this regard,the present paper first summarizes four readily compiled interpreting corpora. Then,based on the China National Knowledge Infrastructure (CKNI), it conducts thestatistics mainly on relevant published papers in Chinese Social Science and Index(CSSCI) journals. Next, it pinpoints a bibliometric analysis on the data by taking intoaccount three parameters, namely, H index, reference citation and their distribution.Then, it makes a detailed review and comments on the background of CIS and itsparadigm, theoretical interpretation of CIS and the research areas of CIS, standardsof developing interpreting corpora and solutions to difficulties in compilation ofinterpreting corpora, research orientations including topics and objects. At present,although CIS have attained preliminary findings and conclusions, it has mainly reliedon the theoretical and analytical frameworks of Systemic Functional Grammar andits utility in CIS, given the fact that it has introduced few interdisciplinary studies.As a result, CIS do not take full advantage of the paradigm of corpus linguistics norexplore into such research topics as features of interpretation, interpreters’ identitiesand interpreting styles. Finally, regarding future studies, the paper proposes that CISshould foreground the relevance of improving the mechanism of interpreting corpuscompilation in order to gain ground in new research methods and perspectives.
基金This paper is supported by the Excellent Dissertation Cultivation Funds of Wuhan University of Technology(2018-YS-090).
文摘The present study chooses Li Sao,one of the representatives of traditional Chinese Chu culture,as the research subject.Through establishing two small monolingual corpora,a comparative analysis of Yang Xianyi’s translation and David Hawkes’translation was made from the perspective of translation universals on three levels,namely lexical level,syntactic level and textual level.The results show that two translations both reflect the translation universals to some extent,but Hawkes’translation is more consistent with the translation universals in comparison with Yang Xianyi’s on the whole.
文摘Educational discourses,or to be more specific,universities’introductory discourses have not been studied from the contrastive perspective using critical genre analysis theories.This study uses Fairclough’s framework of discourse analysis to take a corpus-based contrastive study between the Chinese and global universities’introductory discourses from three aspects.Firstly,the textual dimension will be explored using the corpus-based approach.Secondly,it studies from the discursive dimension from intertextuality and interdiscursivity.Finally,the social cultural perspective study will be given about the corresponding social cultural interpretation on the differences between Chinese and global universities’introduction discourses.
文摘Both the study of metaphor and translation has taken an empirical turn in the past decade,corpus-based method has provided a practical and objective way for investigating metaphor translation from a comparative and cognitive perspective.The purpose of this paper is to reveal the cognitive differences in the perception of“root”between English and Chinese through a contrastive analysis of the two English translations of a Chinese classic novel—Dream of the Red Mansion,the two translations are completed by a native Chinese speaker and a native English speaker respectively.The study is divided into two parts,the first part is devoted to a contrastive analysis of typical examples selected from the data acquired from the online English-Chinese parallel corpus with the online corpus analysis tool Wmatrix,two deductions have been drawn through the analysis concerning the cognition difference in root perception:(1)the integral perception of root and a plant in Chinese VS the binary cognition in English;(2)the concreteness of“root”metaphor in Chinese VS the abstractness in“root”metaphor application in English.Then the two deductions are further demonstrated through corpus-assisted study of“root”metaphor in large online corpuses.The differences in root metaphor usage as well as the cognitive reasons behind the differences have been investigated with emphasis not only on the dominant conceptual root metaphors,but also the semantic preference of the collocated words of the metaphors.
文摘This study compared and analyzed the features of keywords and their collocations in corpora:Chinese Government Work Reports and State of the Union(USA).A further comparison and analysis of the collocations of“develop”and“improve”was then conducted from the perspective of political linguistics.Results suggested that China and the United States have their own emphasis of government work.It was also indicated that“we”and“will”are both high-frequency keywords and combinations of“develop”and“improve”,which shows that both countries give the highest priority to narrowing the distance between the government and the public.
文摘Audio description(AD),unlike interlingual translation and interpretation,is subject to unique constraints as a spoken text.Facilitated by AD,educational videos on COVID-19 anti-virus measures are made accessible to the visually disadvantaged.In this study,a corpus of AD of COVID-19 educational videos is developed,named“Audio Description Corpus of COVID-19 Educational Videos”(ADCCEV).Drawing on the model of Textual and Linguistic Audio Description Matrix(TLADM),this paper aims to identify the linguistic and textual idiosyncrasies of AD themed on COVID-19 response released by the New Zealand Government.This study finds that linguistically,the AD script uses a mix of complete sentences and phrases,the majority being in Present Simple tense.Present participles and the“with”structure are used for brevity.Vocabulary is diverse,with simpler words for animated explainers.Third-person pronouns are common in educational videos.Color words are a salient feature of AD,where“yellow”denotes urgency,and“red”indicates importance,negativity,and hostility.On textual idiosyncrasies,coherence is achieved through intermodal components that align with the video’s mood and style.AD style varies depending on the video’s purpose,from informative to narrative or expressive.
