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New Era of Human-AI Coexistence
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作者 ZHOU LIN 《China Today》 2019年第2期53-53,共1页
IN September 2018,artificial intelligence(AI)scientist Dr.Kai-Fu Lee’s new book,AI Superpowers:China,Silicon Valley,and the New World Order,was released around the world.Soon,it was in the bestseller list on The New ... IN September 2018,artificial intelligence(AI)scientist Dr.Kai-Fu Lee’s new book,AI Superpowers:China,Silicon Valley,and the New World Order,was released around the world.Soon,it was in the bestseller list on The New York Times,USA Today,and The Wall Street Journal. 展开更多
关键词 NEW ERA HUMAN AI coexistence
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Energy Minimization for Heterogenous Traffic Coexistence with Puncturing in Mobile Edge Computing-Based Industrial Internet of Things
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作者 Wang Xue Wang Ying +1 位作者 Fei Zixuan Zhao Junwei 《China Communications》 SCIE CSCD 2024年第10期167-180,共14页
Puncturing has been recognized as a promising technology to cope with the coexistence problem of enhanced mobile broadband(eMBB) and ultra-reliable low latency communications(URLLC)traffic. However, the steady perform... Puncturing has been recognized as a promising technology to cope with the coexistence problem of enhanced mobile broadband(eMBB) and ultra-reliable low latency communications(URLLC)traffic. However, the steady performance of eMBB traffic while meeting the requirements of URLLC traffic with puncturing is a major challenge in some realistic scenarios. In this paper, we pay attention to the timely and energy-efficient processing for eMBB traffic in the industrial Internet of Things(IIoT), where mobile edge computing(MEC) is employed for data processing. Specifically, the performance of eMBB traffic and URLLC traffic in a MEC-based IIoT system is ensured by setting the threshold of tolerable delay and outage probability, respectively. Furthermore,considering the limited energy supply, an energy minimization problem of eMBB device is formulated under the above constraints, by jointly optimizing the resource blocks(RBs) punctured by URLLC traffic, data offloading and transmit power of eMBB device. With Markov's inequality, the problem is reformulated by transforming the probabilistic outage constraint into a deterministic constraint. Meanwhile, an iterative energy minimization algorithm(IEMA) is proposed.Simulation results demonstrate that our algorithm has a significant reduction in the energy consumption for eMBB device and achieves a better overall effect compared to several benchmarks. 展开更多
关键词 energy minimization enhanced mobile broadband(eMBB)and ultra-reliable low latency communications(URLLC)coexistence industrial Internet of Things(IIoT) mobile edge computing(MEC) PUNCTURING
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Synchronization coexistence in a Rulkov neural network based on locally active discrete memristor
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作者 马铭磷 谢小华 +2 位作者 杨阳 李志军 孙义闯 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第5期705-709,共5页
At present, many neuron models have been proposed, which can be divided into discrete neuron models and continuous neuron models. Discrete neuron models have the advantage of faster simulation speed and the ease of un... At present, many neuron models have been proposed, which can be divided into discrete neuron models and continuous neuron models. Discrete neuron models have the advantage of faster simulation speed and the ease of understanding complex dynamic phenomena. Due to the properties of memorability, nonvolatility, and local activity, locally active discrete memristors(LADMs) are also suitable for simulating synapses. In this paper, we use an LADM to mimic synapses and establish a Rulkov neural network model. It is found that the change of coupling strength and the initial state of the LADM leads to multiple firing patterns of the neural network. In addition, considering the influence of neural network parameters and the initial state of the LADM, numerical analysis methods such as phase diagram and timing diagram are used to study the phase synchronization. As the system parameters and the initial states of the LADM change, the LADM coupled Rulkov neural network exhibits synchronization transition and synchronization coexistence. 展开更多
关键词 locally active discrete memristor(LADM) Rulkov synchronization coexistence
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Coexistence of giant Rashba spin splitting and quantum spin Hall effect in H–Pb–F
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作者 薛文明 李金 +3 位作者 何朝宇 欧阳滔 戴雄英 钟建新 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第3期414-418,共5页
Rashba spin splitting(RSS)and quantum spin Hall effect(QSHE)have attracted enormous interest due to their great significance in the application of spintronics.In this work,we theoretically proposed a new two-dimension... Rashba spin splitting(RSS)and quantum spin Hall effect(QSHE)have attracted enormous interest due to their great significance in the application of spintronics.In this work,we theoretically proposed a new two-dimensional(2D)material H–Pb–F with coexistence of giant RSS and quantum spin Hall effec by using the ab initio calculations.Our results show that H–Pb–F possesses giant RSS(1.21 eV·A)and the RSS can be tuned up to 4.16 e V·A by in-plane biaxial strain,which is a huge value among 2D materials.Furthermore,we also noticed that H–Pb–F is a 2D topological insulator(TI)duo to the strong spin–orbit coupling(SOC)interaction,and the large topological gap is up to 1.35 e V,which is large enough for for the observation of topological edge states at room temperature.The coexistence of giant RSS and quantum spin Hall effect greatly broadens the potential application of H–Pb–F in the field of spintronic devices. 展开更多
关键词 coexistence Rashba spin splitting quantum spin Hall effect spin–orbit coupling
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Some of the Mechanisms for Coexistence of Tree Species Diversity in Tropical Forests: A Review of Effects of Tree Density Dependence
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作者 Oladele Fisayo Falade 《Open Journal of Forestry》 2023年第1期132-144,共13页
Tree communities contribute to maintenance of species diversity in tropical forests. Coexistence of many tree species is not without competition. Therefore, coexistence of tree species and size diversities occur seque... Tree communities contribute to maintenance of species diversity in tropical forests. Coexistence of many tree species is not without competition. Therefore, coexistence of tree species and size diversities occur sequentially or simultaneously in tropical natural forests. Understanding coexistence and competition mechanisms of tree species requires knowledge of interactions within and between species. However, many conservation efforts and strategies failed due to inability to identify and maintain functional coexistence mechanisms among tree species in the forest. Also, most trees died because of pressure on their habitats and not because of limiting growth resources. Hence, species identity, minimum distance and size of the neighbouring trees which are responsible for coexistence of competing trees in most tropical forests have not been explicitly reviewed. Therefore, this review evaluated some of the density dependent mechanisms for coexistence of tree species alpha diversity in tropical forests. Many interactive mechanisms are responsible for coexistence tree species in tropical forests. Inter- and intra-specific competitions are the most significant and both facilitate positive and negative density dependence. Therefore, switching from negative to positive density dependence may occur in some situations. Positive and negative density effects regulate species abundance and coexistence through conspecific and heterospecific structures. Aggregates of conspecific and heterospecific neighbours constitute forest spatial structure. Negative density interactions are mutually exclusive and basically ranged from effect of species identity of neighbours, distance to neighbours and tree size of the neighbours to reference trees in the community structures. Some mechanisms shorten distances for heterospecific than conspecific interactions. Conspecific structures improved survival and growth of rare tree species. Interactive mechanisms in tree community and population structures facilitate species diversity and size inequality, respectively. 展开更多
关键词 Tree Community Structure Tree Species Diversity Tree Species coexistence Tree Populations
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Inferring Human-elephant Coexistence Based on Characteristics of Human-elephant Interactions in Nangunhe of Yunnan,China
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作者 WANG Jiahui CHEN Ying +2 位作者 SUN Yakuan LYU Zhuoluo SHI Kun 《Chinese Geographical Science》 SCIE CSCD 2023年第2期363-376,共14页
Human-wildlife conflict(HWC)negatively impacts both humans and wildlife.Attitudes of local residents have been critical in promoting wildlife conservation.It is therefore necessary to understand the characteristics of... Human-wildlife conflict(HWC)negatively impacts both humans and wildlife.Attitudes of local residents have been critical in promoting wildlife conservation.It is therefore necessary to understand the characteristics of HWC and identify influential factors on attitudes towards conservation to implement conservation strategies efficiently.This research focused on features of human-elephant interactions,while attitudes and values regarding the small population of Asian elephants(Elephas maximus)in Nangunhe National Nature Reserve(NNR),Yunnan,China.The total of 327 valid questionnaires were gathered around the area where Asian elephants were distributed.Logistic regression models were employed to analyze the correlations among five predictor variables(‘Area’,‘Family size’,‘Annual income’,‘Quantity of family members in non-primary industries’and‘Experiencing loss or not’)and three response variables(‘Attitude towards elephants’,‘Perception of the values of elephants’and‘Attitude towards tourism development’).The study area was densely forested with tea plants,rubber trees,corns and sugarcane.There,25.99%of respondents reported the experience of human-elephant conflict(HEC),with crop raiding and cash crop damages being the major conflict types.To demonstrate respect for elephants and to mitigate HEC,a unique custom called‘Giving tribute to elephants’was developed long ago.Respondents’township with an official annual festival of‘Giving Tribute to Elephants’(odds ratio(OR)=2.75,P=1.73×10^(-6))and higher annual income(OR=2.09,P=5.45×10^(-5))significantly contributed to forming a more positive attitude towards elephants,whereas HEC itself have contributed to a more negative attitude(OR=0.50,P=3.29×10^(-3)).Therefore,we propose that:1)reducing human-elephant conflict by testing multiple mitigation measures and adopting the most effective one of them;2)enhancing local livelihoods through the development of ecological products and ecotourism;and 3)preserving and developing the Wa culture in this region.The study area deserves more attention and further research to explore and obtain endorsement from the public to achieve coexistence between human and wildlife. 展开更多
关键词 Asian elephant(Elephas maximus) Wa people human-elephant conflict coexistence Nangunhe National Nature Reserve YUNNAN China
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Protection and Restoration of Soil and Water Ecology to Achieve Harmonious Coexistence between Human and Nature
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作者 SUN Fazheng 《Journal of Landscape Research》 2023年第1期60-62,共3页
At present,the ecological environment crisis of global concern,such as climate warming and biodiversity loss,the fundamental reason is the change and destruction of the earth's soil and water ecology.Therefore,pro... At present,the ecological environment crisis of global concern,such as climate warming and biodiversity loss,the fundamental reason is the change and destruction of the earth's soil and water ecology.Therefore,protecting and restoring the authenticity,diversity,cleanliness and integrity of soil and water ecology,we should coordinate and deal with the relationship between human beings and soil and water ecology,and realize the harmonious coexistence between human beings and nature from the three aspects of protecting natural soil and water ecology,protecting and restoring natural soil and water ecology,building and regenerating artificial soil and water ecology. 展开更多
关键词 Soil and water ecology PROTECTION RESTORATION Harmonious coexistence
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Coexistence of diffuse large B-cell lymphoma,acute myeloid leukemia,and untreated lymphoplasmacytic lymphoma/waldenström macroglobulinemia in a same patient:A case report
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作者 Liu-Bo Zhang Lu Zhang +8 位作者 Hong-Lei Xin Yan Wang Hong-Yu Bao Qing-Qi Meng Su-Yu Jiang Xue Han Wan-Ru Chen Jian-Ning Wang Xiao-Feng Shi 《World Journal of Clinical Cases》 SCIE 2023年第18期4295-4305,共11页
BACKGROUND The Coexistence of myeloid and lymphoid malignancies is rare.Myeloid leukemia occurs more frequently as a secondary event in patients receiving chemotherapy agents for lymphoid malignancies.Synchronous diag... BACKGROUND The Coexistence of myeloid and lymphoid malignancies is rare.Myeloid leukemia occurs more frequently as a secondary event in patients receiving chemotherapy agents for lymphoid malignancies.Synchronous diagnoses of diffuse large B-cell lymphoma(DLBCL),acute myeloid leukemia(AML),and untreated lymphoplasmacytic lymphoma/Waldenström macroglobulinemia(LPL/WM)in the same patient have not been reported.Here we report one such case.CASE SUMMARY An 89-year-old man had a chest wall mass histopathologically diagnosed as DLBCL.The bone marrow and peripheral blood contained two groups of cells.One group of cells fulfilled the criteria of AML,and the other revealed the features of small B lymphocytic proliferative disorder,which we considered LPL/WM.Multiple chromosomal or genetic changes were detected in bone marrow mononuclear cells,including ATM deletion,CCND1 amplification,mutations of MYD88(L265P)and TP53,WT1 overexpression,and fusion gene of BIRC2-ARAP1,as well as complex chromosomal abnormalities.The patient refused chemotherapy because of old age and died of pneumonia 1 mo after the final diagnosis.CONCLUSION The coexistence of DLBCL,AML,and untreated LPL/WM in the same patient is extremely rare,which probably results from multiple steps of genetic abnormalities.Asymptomatic LPL/WM might have occurred first,then myelodysplastic syndromerelated AML developed,and finally aggressive DLBCL arose.Therefore,medical staff should pay attention to this rare phenomenon to avoid misdiagnoses. 展开更多
关键词 Diffuse large B-cell lymphoma Acute myeloid leukemia Small B lymphocyte proliferative disorder Lymphoplasmacytic lymphoma/Waldenström macroglobulinemia coexistence Case report
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Coexistence of Pseudotumor Cerebri and Chiari Malformation Type 1
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作者 BarışTen Celal Bağdatoğlu +2 位作者 Hasan HüsnüYüksek Gülhan Temel Yüksel Balcı 《Proceedings of Anticancer Research》 2023年第6期13-20,共8页
Objective:To identify different radiological markers for the diagnosis of the coexistence of pseudotumor cerebri and Chiari malformation type 1.Method:Patients who were clinically suspected to have Chiari malformation... Objective:To identify different radiological markers for the diagnosis of the coexistence of pseudotumor cerebri and Chiari malformation type 1.Method:Patients who were clinically suspected to have Chiari malformation type 1 and were referred to the Department of Radiology between 2007 and 2020,and whose diagnosis was radiologically confirmed through magnetic resonance imaging(MRI),were retrospectively evaluated.A total of 49 Chiari malformation type 1 patients with both cervical and cerebral examinations and 49 control subjects of the same age and gender without a diagnosis of Chiari malformation type 1 were included in the study.In Chiari malformation type 1 diagnosed patients,the presence of pseudotumor cerebri,the presence of syringomyelia in cervical spinal MRI images,and the distance of cerebellar tonsils and obex according to McRae line were evaluated in millimeters.Result:In Chiari malformation type 1 clinically and radiologically diagnosed cases,the cerebellar tonsils and obex were located lower in patients with a radiological diagnosis of pseudotumor cerebri compared to those without,and the rate of accompanying syringomyelia appeared to be higher.However,no statistically significant difference was observed between the two groups.Conclusion:The coexistence of pseudotumor cerebri and Chiari malformation type 1 is more common than previously estimated.Different treatment protocols in the coexistence of pseudotumor cerebri and Chiari malformation type 1 emphasize the importance of making this diagnosis.Further radiological imaging studies are needed to identify different radiological markers for the diagnosis of the coexistence of pseudotumor cerebri and Chiari malformation type 1. 展开更多
关键词 Pseudotumor cerebri Chiari malformation type 1 coexistence Radiological markers
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The Collision and Coexistence between Chinese and American Cultures——The Collision and Coexistence between Two Generations in The Joy Luck Club 被引量:2
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作者 张媛 《广西大学学报(哲学社会科学版)》 2009年第S2期230-231,共2页
In many Chinese and American works,the differences of backgrounds,such as culture,customs and so on occupy a large part,through which readers can see the collision as well as coexistence between the two cultures.The J... In many Chinese and American works,the differences of backgrounds,such as culture,customs and so on occupy a large part,through which readers can see the collision as well as coexistence between the two cultures.The Joy Luck Club has no exception.In this work,the communication under different cultural backgrounds between the generations generates a lot of collision,but they get coexistence in the end.In this paper,the author will analyze the continuous collision and the final coexistence of the four pairs of mothers and daughters,so that readers can learn more about the differences between Chinese and American cultures. 展开更多
关键词 CULTURE COLLISION coexistence mothers daughters
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Study on the "Coexistence between Heaven and Man" Concept and the Chinese Vernacular Architecture Concept
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作者 胡慧 《Journal of Landscape Research》 2009年第11期73-76,93,共5页
On the basis of the characteristics of ancient Chinese culture,the paper discusses the formation inevitability of the 'Coexistence between Heaven and Man' building concept,the connection and the differences wi... On the basis of the characteristics of ancient Chinese culture,the paper discusses the formation inevitability of the 'Coexistence between Heaven and Man' building concept,the connection and the differences with the ecological concept of modern Chinese Vernacular Architecture.The key point is that the contemporary design should absorb the ancient Chinese culture of the 'Coexistence between Heaven and Man' building concept and the essence of Chinese Vernacular Architecture ecological concept,forming the design features of local ecology based on the environmental protection and harmonious coexistence. 展开更多
关键词 coexistence between HEAVEN and MAN ECOLOGICAL environment Architectural culture ECOLOGICAL CONCEPT of VERNACULAR Architecture
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On the Theme of Coexistence of Opposites in The Left Hand of Darkness
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作者 金蕾 《海外英语》 2011年第5X期200-200,205,共2页
As one of the best-known literary works of the American novelist Ursula K.Le Guin,The Left Hand of Darkness is not only successful in its splendid plots and beautiful language but also in the important function of its... As one of the best-known literary works of the American novelist Ursula K.Le Guin,The Left Hand of Darkness is not only successful in its splendid plots and beautiful language but also in the important function of its readers in reading.In the thesis,one of its themes,coexistence of opposites,is analyzed in the reader response perspective in order to reveal Le Guin's reader-consciousness.The theme exists on a higher level in the novel and expresses Le Guin's attitude towards life and universe.Le Guin unified her own philosophy in the novel and tried to call for the reader's resonance. 展开更多
关键词 THEME coexistence of opposites READER response THEORY reader-consciousness PHILOSOPHICAL level
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Coexistence Theory of Slag Structure and Its Application to Calculation of Oxidizing Capability of Slag Melts 被引量:29
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作者 ZHANG Jian 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2003年第1期1-10,共10页
The coexistence theory of slag structure and it's application to calculation of the oxidizing capabilities of slag melts is described. It is shown that the law of mass action can be widely applied to the calculati... The coexistence theory of slag structure and it's application to calculation of the oxidizing capabilities of slag melts is described. It is shown that the law of mass action can be widely applied to the calculation of oxidizing capabilities of slag melts in combination with the coexistence theory of slag structure.For slag melts containing basic oxides FeO and MnO, their oxidizing capabilities can be expressed by N Fe tO =N FeO +6N Fe 2O 3 , while for slag melts containing basic oxides CaO, MgO, etc., in addition to FeO and MnO, their oxidizing capabilities can be given as N Fe tO =N FeO +6N Fe 2O 3 +8N Fe 3O 4 . 展开更多
关键词 oxidizing capability coexistence theory slag structure ACTIVITY mass action concentration
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THE APPLICATION OF THE LAW OF MASS ACTION IN COMBINATION WITH THE COEXISTENCE THEORY OF SLAG STRUCTURE TO THE MULTICOMPONENT SLAG SYSTEMS 被引量:14
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作者 J. Zhang (Metallurgical Engineering School, University of Science and Technology Beijing, Beijing 100083, China) 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2001年第3期177-190,共14页
It is shown by the the law of mass action in combination with the coexistence theory of slag structure that KMn n =NMno /(NFeo [%Mn] does not change with basicities and maintains constant at constant temperature; the... It is shown by the the law of mass action in combination with the coexistence theory of slag structure that KMn n =NMno /(NFeo [%Mn] does not change with basicities and maintains constant at constant temperature; the oxidizing capabilities of multicomponent slag systems containing CaO, MgO etc., can be expressed by NFe tO =NFeO + 6NFe2 O3 + 8NFe3O4; the desulfurizing capabilities of various basic oxides for multicomponent slag systems can be calculated by Ls=8(KCaSNCaO+KMgsNMgo +KFeSNFeO)∑n/[%O]; the dephosphorizing capabili- ties of CaO-MgO-FeO-FeO O3-P2 O5 as well as CaO-FeO-Fe2 O3-A12 O3-P2 O5 molten slags expressed respectively by Lpo=(%P2O5)/[P]2 = 141.94[%O]5∑nK00(1 + K5N2Cao + K6N3CaO + K7N4CaO + K8N2MgO + K9N3MgO + K10N3FeO + K11N4Feo); LPO=(%P2O5)/[P]2= 141.94[%O]5∑nK00(1 + K10N2CaO+ K11N3CaO+ K12N4CaO + K13N3FeO + K14N4FeO) have good agreement with practical values. 展开更多
关键词 coexistence theory oxidizing capacity manganese distribution desulfurizing capability dephosphorizing capability
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Discontinuous bifurcation and coexistence of attractors in a piecewise linear map with a gap 被引量:5
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作者 屈世显 卢永智 +1 位作者 张林 何大韧 《Chinese Physics B》 SCIE EI CAS CSCD 2008年第12期4418-4423,共6页
Coexistence of attractors with striking characteristics is observed in this work, where a stable period-5 attractor coexists successively with chaotic band-ll, period-6, chaotic band-12 and band-6 attractors. They are... Coexistence of attractors with striking characteristics is observed in this work, where a stable period-5 attractor coexists successively with chaotic band-ll, period-6, chaotic band-12 and band-6 attractors. They are induced by dif- ferent mechanisms due to the interaction between the discontinuity and the non-invertibility. A characteristic boundary collision bifurcation, is observed. The critical conditions are obtained both analytically and numerically. 展开更多
关键词 coexistence of attractors piecewise linear map mapping hole discontinuous bifurcation
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APPLICABILITY OF THE MASS ACTION LAW IN COMBINATION WITH THE COEXISTENCE THEORY OF METALLIC MELTS INVOLVING COMPOUND TO BINARY METALLIC MELTS 被引量:4
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作者 J.ZhangMetallurgical Engineering School, University of Science and Technology Beijing, Beijing 100083, China Manuscript received 9 March 2001 in revised form 7 August 2001 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2002年第4期353-362,共10页
Based on the atomicity and molecularity as well as the consistency ofthermodynamic properties and activities of metallic melts with their structures, the coexistencetheory of metallic melts structure involving compoun... Based on the atomicity and molecularity as well as the consistency ofthermodynamic properties and activities of metallic melts with their structures, the coexistencetheory of metallic melts structure involving compound has been suggested. According to this theory,the calculating models of mass action concentrations for different binary metallic melts have beenformulated. The calculated mass action concentrations agree well with corresponding measuredactivities, which confirms that the suggested theory can reflect the structural characteristics ofmetallic melts involving compound and that the mass action law is widely applicable to this kind ofmetallic melts. 展开更多
关键词 metallic melts activity mass action law coexistence theory
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Coexistence of esophageal superficial carcinoma and multiple leiomyomas:A case report 被引量:7
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作者 Takeshi Iwaya Chihaya Maesawa +7 位作者 Noriyuki Uesugi Toshimoto Kimura Kenichiro Ikeda Yusuke Kimura Shingo Mitomo Kaoru Ishida Nobuhiro Sato Go Wakabayashi 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第28期4588-4592,共5页
Leiomyomas are the most common benign tumors of the esophagus. They usually occur as a single lesion or as two or three nodules. Only two cases of esophageal multiple leiomyomas comprising more than 10 nodules have be... Leiomyomas are the most common benign tumors of the esophagus. They usually occur as a single lesion or as two or three nodules. Only two cases of esophageal multiple leiomyomas comprising more than 10 nodules have been reported previously. Moreover, there have been few reports of esophageal squamous cell carcinoma overlying submucosal tumors. We describe a 71-yearold man who was diagnosed as having a superficial esophageal cancer coexisting with two or three leiomyoma nodules. During surgery, 10 or more nodules that had not been evident preoperatively were palpable in the submucosal and muscular layers throughout the esophagus. As intramural metastasis of the esophageal cancer was suspected, we considered additional lymphadenectomy, but had to rule out this option because of the patient's severe anoxemia. Microscopic examination revealed that all the nodules were leiomyomas (20 lesions, up to 3 cm in diameter), and that invasion of the carcinoma cells was limited to the submucosal layer overlying a relatively large leiomyoma. This is the first report of superficial esophageal cancer coexisting with numerous solitary leiomyomas. Multiple minute leiomyomas are often misdiagnosed as intramural metastasis, and a leiomyoma at the base of a carcinoma lesion can also be rnisdiagnosed as tumor invasion. The present case shows that accurate diagnosis is required for the management of patients with coexisting superficial esophageal cancer and multiple leiomyomas. 展开更多
关键词 Multiple leiomyomas Squamous cell carcinoma ESOPHAGUS coexistence
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Spectral Coexistence between LEO and GEO Satellites by Optimizing Direction Normal of Phased Array Antennas 被引量:14
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作者 Chen Zhang Jin Jin +1 位作者 Hao Zhang Ting Li 《China Communications》 SCIE CSCD 2018年第6期18-27,共10页
This paper addresses the spectral coexistence between LEO constellation and GEO belt for global distributed earth stations. A specific method is introduced to mitigate the in-line interference by tilting the direction... This paper addresses the spectral coexistence between LEO constellation and GEO belt for global distributed earth stations. A specific method is introduced to mitigate the in-line interference by tilting the direction normal of phased array antennas of LEO satellites, and the optimal direction is found by solving a non-linear programming problem. The simulation results prove that the proposed approach leads to greater link availability while guaranteeing the desired received signal level especially for low-latitude earth stations. 展开更多
关键词 satellite constellation satellite communication spectral coexistence interference mitigation phased array
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Coexistence of hepatocellular carcinoma and gastrointestinal stromal tumor:A case report 被引量:9
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作者 RadoslawJaworski TomaszJastrzebski +2 位作者 MaciejSwierblewski KamilDrucis Grazyna Kobierska-Gulida 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第4期665-667,共3页
Malignant gastrointestinal stromal tumors (GIST) are rare mesenchymal tumors originating from the wall of the gastrointestinal tract. Their coexistence with other tumors originating from other germ layers is unique.... Malignant gastrointestinal stromal tumors (GIST) are rare mesenchymal tumors originating from the wall of the gastrointestinal tract. Their coexistence with other tumors originating from other germ layers is unique. We have reported a case of a 63-year-old GIST patient presenting as an epigastric mass associated with hepatic tumor. Histologically, the mesenteric tumor was composed of spindle cells showing both neural and smooth muscle differentiation. Immunohistochemical examination showed positive staining for CDl17, vimentin, S-100, and SMA, while CD34 antigen was negative. The hepatic tumor was diagnosed as hepatocellular carcinoma (HCC). To the best of our knowledge, this is the first case of GIST and HCC coexistence. The rarity of the case, however, should not lead to ignoring such a possibility in differential diagnosis. 展开更多
关键词 Malignant GIST Hepatocellular carcinoma coexistence of GIST and HCC
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Coexistence Analysis between 5G System and Fixed- Satellite Service in 3400-3600 MHz 被引量:6
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作者 Haifeng Tan Yanjie Liu +1 位作者 Zhiyong Feng Qixun Zhang 《China Communications》 SCIE CSCD 2018年第11期25-32,共8页
The 3400-3600 MHz band is one of the most important candidate frequency bands for the rollout of 5 G system. However, the coexistence between 5 G system and fixed-satellite service(FSS) in this frequency band is one o... The 3400-3600 MHz band is one of the most important candidate frequency bands for the rollout of 5 G system. However, the coexistence between 5 G system and fixed-satellite service(FSS) in this frequency band is one of the most challenging problems for both academic researchers and industry engineers. In this paper, the saturation interference from 5 G base stations to the existing FSS above 3600 MHz is analyzed and the coexistence solution is achieved, which can reduce the interference and guarantee the coexistence between 5 G system and FSS. Furthermore, the Monte Carlo simulation, laboratory test and field test are carried out to verify the coexistence solution.Results show that an isolation distance of 1-2 km is required to avoid the saturation interference in terms of the adjacent bands scenario.To further reduce the isolation distance to 50 m, additional isolation of 35 dB will be necessary, which can be fulfilled by installing a filter at the input port of LNB from a real implementation perspective. 展开更多
关键词 5G system fixed-satellite service coexistence analysis
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