The Main Colors of the Forbidden City

The main colors of the Forbidden City are Red and Yellow,which can represent rich cultural deposits.According to the Chinese traditional culture,the Red of the Forbidden City has always been regarded as a positive color of celebration,conveying dignity and happiness.The Yellow color is usually considered as a promising color,and represents a bumper harvest.Based on the principle of the Five Elements,Fire is red,which means breeding and encouragement,and shows prosperity and a solid foundation for the country.Yellow represents Winged Dragon,belonging to the Center of the Earth,and symbolizes the divine right of emperors.Therefore,the color of the Forbidden City(see Figure 1)is of great significance to the development of history and the revival of culture.We still need to work determinedly for the protection of the cultural heritages,so that more people can have the opportunity to understand the brilliance of Chinese civilization.

A Systematic Study of the Forbidden Pitch in the CD Through-Pitch Curve for Beyond 130nm

The forbidden pitch ＂dip＂ in the critical dimension （CD） through the pitch curve is a well-known optical proximity effect. The CD and CD process window near the ＂dip＂,usually found near a pitch range of 1.1 to 1.4 wavelength/ NA （numerical aperture）,is smaller when compared with other pitches. This is caused by inadequate imaging contrast for an unequal line and space grating. Although this effect is relatively well-known, its relationship with typical process condition parameters,such as the effective image blur caused by the photo-acid diffusion during the post exposure bake or the aberration in the imaging lens, has not been systematically studied. In this paper, we will examine the correlation between the image blur and the effect on the CD, including the decrease in the CD value （the depth of the ＂dip＂） and the CD process window. We find that both the decrease in the CD value and the focus latitude near the forbidden pitch correlate very well with the effective Gaussian image blur. Longer effective diffusion length correlates well with a smaller process window and a deeper CD ＂dip＂. We conclude that the dip depth is very sensitive to the change in image contrast.

Two-agent single machine scheduling with forbidden intervals

We consider the resumable version of the two-agent single machine scheduling prob- lems with forbidden intervals in which the jobs cannot be processed. The goal is to minimize the sum of the objective functions of the two agents. Polynomial and pseudo-polynomial time algorithms are presented for various combinations of regular scheduling objective functions.

A complexity measure approach based on forbidden patterns and correlation degree

Based on forbidden patterns in symbolic dynamics, symbolic subsequences are classified and relations between forbidden patterns, correlation dimensions and complexity measures are studied. A complexity measure approach is proposed in order to separate deterministic （usually chaotic） series from random ones and measure the complexities of different dynamic systems. The complexity is related to the correlation dimensions, and the algorithm is simple and suitable for time series with noise. In the paper, the complexity measure method is used to study dynamic systems of the Logistic map and the Henon map with multi-parameters.

Forbidden transition properties of fine-structure 2p^3 ~4S_(3/2)–2p^3 ~2D_(3/2,5/2) for nitrogen-like ions

Based on relativistic wave functions from multiconfiguration Dirac-Hartree-Fock and configuration interaction cal- culations, E2 and M1 transition probabilities of 2p3 4S3/2-2p3 2D3/2,5/2 are investigated in the nitrogen-like sequence with 7 〈 Z 〈 16. The contributions of the electron correlations, Breit interaction, and the quantum electrodynamic （QED） effects on the transition properties are analyzed. The present results can be used for diagnosing plasma. In addition, several N-like ions can also be recommended as a promising candidate for a highly charged ion （HCI） clock with a quality factor （Q） of trnnsition as hitch as 1020.

Electric-dipole allowed(E1) and forbidden(E2,M1 and M2) transition probabilities of 4f for N^+

By applying systematically enlarged multi-configuration Dirac-Fock wavefunction, the transitions for electricdipole allowed （E1） and forbidden （E2, M1 and M2） lines are studied among 4f pair coupling and low-lying configurations for singly ionized nitrogen. Most important effects of relativity, electron correlation, the rearrangement of electron density, Breit interaction, and quantum electrodynamic effects are included in the computation. Then, allowed （E1） and forbidden （E2, M1 and M2） transition probabilities of 4f for N＋ are obtained and compared with experimental results. Good agreement with available experimental results is found and most of the data of 4f are presented for the first time.

Theoretical investigation on forbidden transition properties of fine-structure splitting in ~2D state for K-like ions with 26≤Z≤36

Excitation energies, magnetic dipole, and electric quadrupole transition probabilities of the 3d ^2D3/2-3d ^2D5/2 transition in the potassium-like （K-like） sequence with 26 ≤ Z ≤ 36 are investigated by using the multi-configuration Dirac-Hartree-Fock （MCDHF） method. The contributions of the electron correlations, Breit interaction, and the leading-order quantum electrodynamic （QED） effects on the transition properties are analyzed. The present results are interested in the laboratory tokamak and the astronomical observations. Furthermore, the feasibility of these ions for the highly charged ion （HCI） clocks is discussed. Considering the wavelength of lasers and manipulation process of the atomic clocks, Cu^10＋ and Zn^11＋ are recommended as promising candidates with achievable quality factors at the 10^15 level.

Spacecraft Attitude Control with Saturation and Attitude Forbidden Constraints via Second⁃Order Cone Programming

This paper investigates the optimal control problem of spacecraft reorientation subject to attitude forbidden constraints,angular velocity saturation and actuator saturation simultaneously.A second-order cone programming(SOCP)technology is developed to solve the strong nonlinear and non-convex control problem in real time.Specifically,the nonlinear attitude kinematic and dynamic are transformed and relaxed to a standard affine system,and linearization and L1 penalty technique are adopted to convexify non-convex inequality constraints.With the proposed quadratic performance index of angular velocity,the optimal control solution is obtained with high accuracy using the successive SOCP algorithm.Finally,the effectiveness of the algorithm is validated by numerical simulation.

'Celebrating the Spring Festival in the Forbidden City'to Experience the Royal Ttraditions

The Palace Museum in Beijing, which is also known as the Forbidden City, was China s imperial palace from 1420 to 1911. Visitors who visiting the Palace Museum over 2019 Spring Festival will find something new and warm the moment they step through its front gate.

On the Motions of Four Pagoda Clocks in the Forbidden City

Ancient mechanical clocks and automatons are solid evidence regarding the evolution of technological development.At least four ingenious eighteenth-century clocks with pagoda automatons are preserved in the Palace Museum in Beijing.Two were made in China,the other two in Britain.Although the internal mechanical components were maintained and recorded in the late twentieth century,their mechanism structure is mostly not made available to the public owing to the historical value of these artefacts.This study introduces feasible mechanism structures for the four pagoda automatons based on published works,along with considerations of mechanical design.Five subsystems of the clocks are analyzed,and two mechanisms of the pagoda automaton are illustrated.In particular,feasible mechanisms of the four pagoda automatons for raising their stories are explained.The analysis procedure presented in this paper expands the feasibility of reconstruction work on ancient mechanisms with unknown structures.

Forbidden City Cultural Dialogue Highlights Harmony, Peace, and Diversity

THE Palace Museum,also known as the Forbidden City,was the setting last November 28 of the inaugural Dialogue on Exchanges and Mutual Learning among Civilizations:2019 Talks in the Forbidden City.Organized by the Chinese Association for International Understanding(CAFIU),the event was attended by political heavyweights,scholars,artists,and cultural celebrities from across the globe.

The Forbidden City:A 600-Year-Old Cultural Feast

THE year 2020 marks the 600th anniversary of the completion of the Forbidden City and is the 95th anniversary of the establishment of the Palace Museum.The Palace Museum,in addition to being the epitome of ancient Chinese urban construction and palace building design,is a material carrier of the tradition of Chinese rituals and music and their long history.From the Forbidden City,a symbol of royal power,to the Palace Museum,which is open to the public,what is the past and present story of this place?

Renovation of the Forbidden City Should the Imperial Collection Be Displayed Underground?

BERNARDO Bertolucci’s film, The Last Emperor, drew its Western audience into a mystic, grandiose, oriental palace that was the Forbidden City, leaving them awestruck at the

Theoretical study of spin-forbidden cooling transitions of indium hydride using ab initio methods

The feasibility of spin-forbidden cooling of the In H molecule is investigated based on ab initio quantum chemistry calculations. The potential energy curves for the X^1Σ0^＋^＋, a^3Π0-, a^3Π0^＋, a^3Π1, a-3Π2, A-1Π1, 1-3Σ^0^-＋, and 1-3Σ1-＋states of In H are obtained based on multi-reference configuration interaction plus the Davidson corrections method. The calculated spectroscopic constants are in good agreement with the available experimental data. In addition, the influences of the active space and spin–orbit coupling effects on the potential energy curves and spectroscopic constants are also studied. For Re of a^3Π0^-, a^3Π0^＋, a^3Π1, and a-3Π2 states, the error from large active space is small. The potential energy curve of the A-1Π1state is not smooth for small active space. The spin–orbit coupling effects have great influences on the potential well depth and equilibrium internuclear distance of the A-1Π state. The Franck–Condon factors and radiative lifetimes are obtained on the basis of the transition dipole moments of the a^3Π0^＋）→ X^1Σ0^＋^＋, a-3Π1 → X-1Σ0^＋-＋, and A-1Π1 → X-1Σ0^＋^＋ transitions. Our calculation indicates that the a^3Π1（ ν＇= 0） → X-1Σ0^＋^＋（ν = 0） transition provides a highly diagonally distributed Franck–Condon factor and a short radiative lifetime for the a3Π1 state, which can ensure rapid and efficient laser cooling of In H.The proposed laser drives a-3Π1 → X-1Σ0^＋^＋ transitions by using three wavelengths.