The Geology and Landform of Hoh Xil and Its Evolution This book is edited by Li Jianghai,Wencheng,and Liu Chiheng,and narrates the geology and landform of Hoh Xil.With a large number of photos,this book provides reade...The Geology and Landform of Hoh Xil and Its Evolution This book is edited by Li Jianghai,Wencheng,and Liu Chiheng,and narrates the geology and landform of Hoh Xil.With a large number of photos,this book provides readers with detailed information about topographical features including highland glaciers,lakes,rivers,and plains.Experts apply remote sensing technology,geophysics,and on-site investigations to study Hoh Xil’s structural makeup,model its fractured terrain,and perform a myriad of other analyses.展开更多
Due to the impact of voltage,temperature and device aging,the traditional ring oscillator-based physical unclonable functions(RO-PUF)suffers from a unreliability issue,i.e.,PUF output is subject to a constant change.T...Due to the impact of voltage,temperature and device aging,the traditional ring oscillator-based physical unclonable functions(RO-PUF)suffers from a unreliability issue,i.e.,PUF output is subject to a constant change.To improve the reliability of the PUF,a stability test scheme related to the PUF mapping unit is proposed.The scheme uses ring oscillators with multiple complexity and various frequencies as sources of interference,which are placed near the PUF prototype circuit to interfere with it.By identifying and discarding unstable slices whichlead to t e instability of PUF,PUF reliability can be effectively improved.Experimental results show that surrounding logic circuits with multiple complexity and multiple frequencies can identify different unstable slices,a d the higher the complexity,t e more unstable slices are detected.Moreover,compared with newly published PUF literature,t e PUF cicuit possesses better statistical characteristic of randomness and lower resource consumption.W it temperatures varying from 0 to 120 t and voltage fluctuating between 0.85 and 1.2 V,its uniqueness and stability can achieve 49.78%a d 98.00%,respectively,which makes it better for use in t e field of security.展开更多
Korapuzha is a short river of 40 km with a drainage area of 624 km^2, flowing from dense forest and empties into the Arabian sea. It is formed by the confluence of two streams Agalapuzha and Punnoorpuzha. In this stud...Korapuzha is a short river of 40 km with a drainage area of 624 km^2, flowing from dense forest and empties into the Arabian sea. It is formed by the confluence of two streams Agalapuzha and Punnoorpuzha. In this study the samples were collected from Agalapuzha, Punnoorpuzha and Korappuzha, Korapuzha estuaries. The temperature and pH were monitored on the site and the remaining parameters were analyzed in the laboratory. The physical quality parameters such as color, odor, appearance and chemical quality parameters such as pH, alkalinity, chloride, nitrate, nitrite, sulphate, ammonia, dissolved oxygen, total solids, total hardness, and iron have been evaluated. Compare the physical and chemical parameters. The physico-chemical analysis shows that the samples have high level of salinity, sulphate, total solids and total hardness. The results show that the water is affected by the intrusion of sea water into the river by excess excavation of sands from river for the construction of buildings and other anthropogenic activities which leads to environmental destruction.展开更多
We review and summarize the applications of the Grad-Shafranov(GS) reconstruction technique to space plasma structures in the Earth's magnetosphere and in the interplanetary space. We organize our presentations fo...We review and summarize the applications of the Grad-Shafranov(GS) reconstruction technique to space plasma structures in the Earth's magnetosphere and in the interplanetary space. We organize our presentations following the branches of the "academic family tree" rooted on Prof. Bengt U. ? Sonnerup, the inventor of the GS method. Special attentions are paid to validations of the GS reconstruction results via(1) the direct validation by co-spatial in-situ measurements among multiple spacecraft, and(2) indirect validation by implications and interpretations of the physical connection between the structures reconstructed and other related processes. For the latter, the inter-comparison and interconnection between the large-scale magnetic flux ropes(i.e., Magnetic Clouds) in the solar wind and their solar source properties are presented. In addition, we also summarize various GS-type(or-like) reconstruction and an extension of the GS technique to toroidal geometry. In particular,we point to a possible advancement with added complexity of "helical symmetry" and mixed helicity, in the hope of stimulating interest in future development. We close by offering some thoughts on appreciating the scientific merit of GS reconstruction in general.展开更多
We derive the basic canonical brackets amongst the creation and annihilation operators for a two(1 + 1)-dimensional(2D) gauge field theoretic model of an interacting Hodge theory where a U(1) gauge field(Aμ) is coupl...We derive the basic canonical brackets amongst the creation and annihilation operators for a two(1 + 1)-dimensional(2D) gauge field theoretic model of an interacting Hodge theory where a U(1) gauge field(Aμ) is coupled with the fermionic Dirac fields(ψ andˉψ). In this derivation, we exploit the spin-statistics theorem, normal ordering and the strength of the underlying six infinitesimal continuous symmetries(and the concept of their generators) that are present in the theory. We do not use the definition of the canonical conjugate momenta(corresponding to the basic fields of the theory) anywhere in our whole discussion. Thus, we conjecture that our present approach provides an alternative to the canonical method of quantization for a class of gauge field theories that are physical examples of Hodge theory where the continuous symmetries(and corresponding generators) provide the physical realizations of the de Rham cohomological operators of differential geometry at the algebraic level.展开更多
文摘The Geology and Landform of Hoh Xil and Its Evolution This book is edited by Li Jianghai,Wencheng,and Liu Chiheng,and narrates the geology and landform of Hoh Xil.With a large number of photos,this book provides readers with detailed information about topographical features including highland glaciers,lakes,rivers,and plains.Experts apply remote sensing technology,geophysics,and on-site investigations to study Hoh Xil’s structural makeup,model its fractured terrain,and perform a myriad of other analyses.
基金The National Natural Science Foundation of China(No.61674048,61371025,61574052,61604001)
文摘Due to the impact of voltage,temperature and device aging,the traditional ring oscillator-based physical unclonable functions(RO-PUF)suffers from a unreliability issue,i.e.,PUF output is subject to a constant change.To improve the reliability of the PUF,a stability test scheme related to the PUF mapping unit is proposed.The scheme uses ring oscillators with multiple complexity and various frequencies as sources of interference,which are placed near the PUF prototype circuit to interfere with it.By identifying and discarding unstable slices whichlead to t e instability of PUF,PUF reliability can be effectively improved.Experimental results show that surrounding logic circuits with multiple complexity and multiple frequencies can identify different unstable slices,a d the higher the complexity,t e more unstable slices are detected.Moreover,compared with newly published PUF literature,t e PUF cicuit possesses better statistical characteristic of randomness and lower resource consumption.W it temperatures varying from 0 to 120 t and voltage fluctuating between 0.85 and 1.2 V,its uniqueness and stability can achieve 49.78%a d 98.00%,respectively,which makes it better for use in t e field of security.
文摘Korapuzha is a short river of 40 km with a drainage area of 624 km^2, flowing from dense forest and empties into the Arabian sea. It is formed by the confluence of two streams Agalapuzha and Punnoorpuzha. In this study the samples were collected from Agalapuzha, Punnoorpuzha and Korappuzha, Korapuzha estuaries. The temperature and pH were monitored on the site and the remaining parameters were analyzed in the laboratory. The physical quality parameters such as color, odor, appearance and chemical quality parameters such as pH, alkalinity, chloride, nitrate, nitrite, sulphate, ammonia, dissolved oxygen, total solids, total hardness, and iron have been evaluated. Compare the physical and chemical parameters. The physico-chemical analysis shows that the samples have high level of salinity, sulphate, total solids and total hardness. The results show that the water is affected by the intrusion of sea water into the river by excess excavation of sands from river for the construction of buildings and other anthropogenic activities which leads to environmental destruction.
基金supported by National Aeronautics and Space Administration (NASA) and National Science Foundation (NSF) (Grants Nos. AGS-1062050, NNG04GF47G, NNG06GD41G, NNX12AF97G, NNX12AH50G, NNH13ZDA001N, and NNX14AF41G)
文摘We review and summarize the applications of the Grad-Shafranov(GS) reconstruction technique to space plasma structures in the Earth's magnetosphere and in the interplanetary space. We organize our presentations following the branches of the "academic family tree" rooted on Prof. Bengt U. ? Sonnerup, the inventor of the GS method. Special attentions are paid to validations of the GS reconstruction results via(1) the direct validation by co-spatial in-situ measurements among multiple spacecraft, and(2) indirect validation by implications and interpretations of the physical connection between the structures reconstructed and other related processes. For the latter, the inter-comparison and interconnection between the large-scale magnetic flux ropes(i.e., Magnetic Clouds) in the solar wind and their solar source properties are presented. In addition, we also summarize various GS-type(or-like) reconstruction and an extension of the GS technique to toroidal geometry. In particular,we point to a possible advancement with added complexity of "helical symmetry" and mixed helicity, in the hope of stimulating interest in future development. We close by offering some thoughts on appreciating the scientific merit of GS reconstruction in general.
基金the financial support from CSIR and UGC, New Delhi, Government of India, respectively
文摘We derive the basic canonical brackets amongst the creation and annihilation operators for a two(1 + 1)-dimensional(2D) gauge field theoretic model of an interacting Hodge theory where a U(1) gauge field(Aμ) is coupled with the fermionic Dirac fields(ψ andˉψ). In this derivation, we exploit the spin-statistics theorem, normal ordering and the strength of the underlying six infinitesimal continuous symmetries(and the concept of their generators) that are present in the theory. We do not use the definition of the canonical conjugate momenta(corresponding to the basic fields of the theory) anywhere in our whole discussion. Thus, we conjecture that our present approach provides an alternative to the canonical method of quantization for a class of gauge field theories that are physical examples of Hodge theory where the continuous symmetries(and corresponding generators) provide the physical realizations of the de Rham cohomological operators of differential geometry at the algebraic level.
