Optical microcavities have attracted tremendous interest in both fundamental and applied research in the past few decades, thanks to their small footprint, easy integrability, and high quality factors. Using total int...Optical microcavities have attracted tremendous interest in both fundamental and applied research in the past few decades, thanks to their small footprint, easy integrability, and high quality factors. Using total internal reflection from a dielectric interface or a photonic band gap in a periodic system, these photonic structures do not rely on conventional metal-coated mirrors to confine light in small volumes, which have brought forth new developments in both classical and quantum optics. This focus issue showcases several such developments and related findings, which may pave the way for the next generation of on-chip photonic devices based on microcavities.展开更多
YAN Cailing lives on the Loess Plateau in northwestern China. In spite of her lightheartedness and cheer, she actually leads an uneasy life. At 37,she has three children. When she was small, her family lived a hard li...YAN Cailing lives on the Loess Plateau in northwestern China. In spite of her lightheartedness and cheer, she actually leads an uneasy life. At 37,she has three children. When she was small, her family lived a hard life. Her parents couldn’t afford tuition fees for all their six daughters. She went to school without textbooks, always having to listen attentively to insure she would remember the teacher’s lessons. In winter, she wore thin clothes and ragged shoes. Even when both her feet were frostbitten, she still continued to go to school. In 1974, Yan Cailing was admitted to a senior high school but then failed to pass展开更多
The observed high over-luminous type-Ia supernovae imply the existence of super-Chandrasekhar limit white dwarfs, which raises a challenge to the classical white dwarf theories. By employing the Eddington-inspired Bor...The observed high over-luminous type-Ia supernovae imply the existence of super-Chandrasekhar limit white dwarfs, which raises a challenge to the classical white dwarf theories. By employing the Eddington-inspired Born-Infeld （EiBI） gravity, we reinvestigate the structures and properties of white dwarfs, and find out that the EiBI gravity provides a new way to understand the observations. It is shown that by choosing an appropriate positive Eddington parameter k, a massive white dwarf with mass up to 2.8M can be supported by the equation of state of free electron gas. Unlike the classical white dwarf theory, the maximum mass of the white dwarf sequence in the EiBI gravity is not decided by the mass radius relations, but is decided by the central density, pc = 4.3 × 1014 kg/ms, above which neutronization cannot be avoided and the white dwarf will transform into a neutron star. On the other hand, if the gravity in the massive white dwarf really behaves as the EiBI gravity predicts, then one can obtain a constraint on the Eddington parameter in the EiBI gravity, that is, 87rpokG/c2 ≥ 80 （where po =- 10^18 kg/m3） to support a massive white dwarf with mass up to 2.8M. Moreover, we find out that the fast Keplarian frequency of the massive white dwarf raises a degeneration between the two kinds of compact stars, that is, one cannot distinguish whether the observed massive pulsar is a massive neutron star or a massive white dwarf only through the observed pulse frequency and mass.展开更多
Editor's note: We are sorry that because of the over-crowded space in our last issue, we are delayed in presenting the second part of the report delivered by the CAS President Lu Yongxiang at the 2002 working ... Editor's note: We are sorry that because of the over-crowded space in our last issue, we are delayed in presenting the second part of the report delivered by the CAS President Lu Yongxiang at the 2002 working conference of CAS. The report appears in two installments in this and the 1st issue of this volume. ……展开更多
Editor's note: We are sorry that because of the over-crowded space in our last issue, we are delayed in presenting the second part of the report delivered by the CAS President Lu Yongxiang at the 2002 working conf...Editor's note: We are sorry that because of the over-crowded space in our last issue, we are delayed in presenting the second part of the report delivered by the CAS President Lu Yongxiang at the 2002 working conference of CAS. The report appears in two installments in this and the 1st issue of this volume.展开更多
Based on behavior science and direct causes analysis of serious accidents in Chinese coal mines in recent 5 years, a conclusion that unsafe behaviors of coal mine staff were the direct causes of these serious accident...Based on behavior science and direct causes analysis of serious accidents in Chinese coal mines in recent 5 years, a conclusion that unsafe behaviors of coal mine staff were the direct causes of these serious accidents was drawn, accounting for 91.3%. If staff was divided into executor and manager, percentages of the executor＇s and manager＇s unsafe behaviors in direct causes of the accidents were 69% and 54%, respectively, with executor＇s unsafe behavior as direct causes and manager＇s unsafe behavior as essential reasons after thorough analysis of these accidents. Further, on the basis of dual structure theory analysis, three new understandings, including transformation, hierarchy classification and representativeness of behavior factors were il- lustrated. Behavior factors of executors and managers in Chinese coal mines were summarized and classified by new recogni- tion. Then, dual structure theory was applied in a coal mine in Hebei Province of China; weakening unsafe behaviors and strengthening safe factors can attain the purpose of motivating safer behaviors in the coal mine.展开更多
Traditional Chinese medicine(TCM) plays an important role in the medical system used in health care and treatment of diseases.This article reviews the basic theory of TCM based on its formation and contributions.Two n...Traditional Chinese medicine(TCM) plays an important role in the medical system used in health care and treatment of diseases.This article reviews the basic theory of TCM based on its formation and contributions.Two new personal points are proposed as follows:Six Zang(六脏) theory and deemphasization of the five-element theory.The basic theory of Chinese herbs is also discussed.展开更多
In a recent online publication of Science,Professor Peter Strasser of the Technical University of Berlin,Germany,and his collaborators reported element-specific anisotropic growth of Pt and Ni in shaped Pt alloy synth...In a recent online publication of Science,Professor Peter Strasser of the Technical University of Berlin,Germany,and his collaborators reported element-specific anisotropic growth of Pt and Ni in shaped Pt alloy synthesis[1].They showed that the surface steps in the Pt3Ni concave hexapod alloy formed in the initial stage of the synthesis were crucial in the segregation of an M-rich(M=Ni,Co,展开更多
Mitchell’s theory is a breakthrough on the understanding of oxidative phosphorylation of mitochondria, whereas the controversy on this theory is never stop even after Mitchell
The vast amount of the "omics" information of diseased "somatic" cell other than the polymorphic information of the "germline" genome sequences, brings about not
Comrade Xi Jinping points out in the Report to the 19th National Congress of the Communist Party of China(CPC or the Party)that after a long period of efforts,socialism with Chinese characteristics has entered a new e...Comrade Xi Jinping points out in the Report to the 19th National Congress of the Communist Party of China(CPC or the Party)that after a long period of efforts,socialism with Chinese characteristics has entered a new era.,which is a new historical position for China to develop.Scientific understanding展开更多
文摘Optical microcavities have attracted tremendous interest in both fundamental and applied research in the past few decades, thanks to their small footprint, easy integrability, and high quality factors. Using total internal reflection from a dielectric interface or a photonic band gap in a periodic system, these photonic structures do not rely on conventional metal-coated mirrors to confine light in small volumes, which have brought forth new developments in both classical and quantum optics. This focus issue showcases several such developments and related findings, which may pave the way for the next generation of on-chip photonic devices based on microcavities.
文摘YAN Cailing lives on the Loess Plateau in northwestern China. In spite of her lightheartedness and cheer, she actually leads an uneasy life. At 37,she has three children. When she was small, her family lived a hard life. Her parents couldn’t afford tuition fees for all their six daughters. She went to school without textbooks, always having to listen attentively to insure she would remember the teacher’s lessons. In winter, she wore thin clothes and ragged shoes. Even when both her feet were frostbitten, she still continued to go to school. In 1974, Yan Cailing was admitted to a senior high school but then failed to pass
基金Supported by the National Natural Science Foundation of China under Grant Nos 11275073 and 11305063the Fundamental Research Funds for the Central Universities under Grant No 2014ZG0036
文摘The observed high over-luminous type-Ia supernovae imply the existence of super-Chandrasekhar limit white dwarfs, which raises a challenge to the classical white dwarf theories. By employing the Eddington-inspired Born-Infeld （EiBI） gravity, we reinvestigate the structures and properties of white dwarfs, and find out that the EiBI gravity provides a new way to understand the observations. It is shown that by choosing an appropriate positive Eddington parameter k, a massive white dwarf with mass up to 2.8M can be supported by the equation of state of free electron gas. Unlike the classical white dwarf theory, the maximum mass of the white dwarf sequence in the EiBI gravity is not decided by the mass radius relations, but is decided by the central density, pc = 4.3 × 1014 kg/ms, above which neutronization cannot be avoided and the white dwarf will transform into a neutron star. On the other hand, if the gravity in the massive white dwarf really behaves as the EiBI gravity predicts, then one can obtain a constraint on the Eddington parameter in the EiBI gravity, that is, 87rpokG/c2 ≥ 80 （where po =- 10^18 kg/m3） to support a massive white dwarf with mass up to 2.8M. Moreover, we find out that the fast Keplarian frequency of the massive white dwarf raises a degeneration between the two kinds of compact stars, that is, one cannot distinguish whether the observed massive pulsar is a massive neutron star or a massive white dwarf only through the observed pulse frequency and mass.
文摘 Editor's note: We are sorry that because of the over-crowded space in our last issue, we are delayed in presenting the second part of the report delivered by the CAS President Lu Yongxiang at the 2002 working conference of CAS. The report appears in two installments in this and the 1st issue of this volume. ……
文摘Editor's note: We are sorry that because of the over-crowded space in our last issue, we are delayed in presenting the second part of the report delivered by the CAS President Lu Yongxiang at the 2002 working conference of CAS. The report appears in two installments in this and the 1st issue of this volume.
文摘Based on behavior science and direct causes analysis of serious accidents in Chinese coal mines in recent 5 years, a conclusion that unsafe behaviors of coal mine staff were the direct causes of these serious accidents was drawn, accounting for 91.3%. If staff was divided into executor and manager, percentages of the executor＇s and manager＇s unsafe behaviors in direct causes of the accidents were 69% and 54%, respectively, with executor＇s unsafe behavior as direct causes and manager＇s unsafe behavior as essential reasons after thorough analysis of these accidents. Further, on the basis of dual structure theory analysis, three new understandings, including transformation, hierarchy classification and representativeness of behavior factors were il- lustrated. Behavior factors of executors and managers in Chinese coal mines were summarized and classified by new recogni- tion. Then, dual structure theory was applied in a coal mine in Hebei Province of China; weakening unsafe behaviors and strengthening safe factors can attain the purpose of motivating safer behaviors in the coal mine.
文摘Traditional Chinese medicine(TCM) plays an important role in the medical system used in health care and treatment of diseases.This article reviews the basic theory of TCM based on its formation and contributions.Two new personal points are proposed as follows:Six Zang(六脏) theory and deemphasization of the five-element theory.The basic theory of Chinese herbs is also discussed.
文摘In a recent online publication of Science,Professor Peter Strasser of the Technical University of Berlin,Germany,and his collaborators reported element-specific anisotropic growth of Pt and Ni in shaped Pt alloy synthesis[1].They showed that the surface steps in the Pt3Ni concave hexapod alloy formed in the initial stage of the synthesis were crucial in the segregation of an M-rich(M=Ni,Co,
文摘Mitchell’s theory is a breakthrough on the understanding of oxidative phosphorylation of mitochondria, whereas the controversy on this theory is never stop even after Mitchell
文摘The vast amount of the "omics" information of diseased "somatic" cell other than the polymorphic information of the "germline" genome sequences, brings about not
文摘Comrade Xi Jinping points out in the Report to the 19th National Congress of the Communist Party of China(CPC or the Party)that after a long period of efforts,socialism with Chinese characteristics has entered a new era.,which is a new historical position for China to develop.Scientific understanding
