Time－dependentTheoryofRamanScatteringwithPulses－－ApplicationtoContinuumRamanSpectroscopy

Ｔｉｍｅ－ｄｅｐｅｎｄｅｎｔＴｈｅｏｒｙｏｆＲａｍａｎＳｃａｔｔｅｒｉｎｇｗｉｔｈＰｕｌｓｅｓ－－ＡｐｐｌｉｃａｔｉｏｎｔｏＣｏｎｔｉｎｕｕｍＲａｍａｎＳｐｅｃｔｒｏｓｃｏｐｙＳｏｏ－Ｙ．Ｌｅｅ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，Ｆａｃｕｌ...     

A New Laser Frequency-stabilizing and Frequency-locking System

ＡＮｅｗＬａｓｅｒＦｒｅｑｕｅｎｃｙ－ｓｔａｂｉｌｉｚｉｎｇａｎｄＦｒｅｑｕｅｎｃｙ－ｌｏｃｋｉｎｇＳｙｓｔｅｍ￥ＣＨＥＮＣｈａｎｇｍｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＥｌｅｃｔｒｏｎｉｃａｎｄＩｎｆｏｒｍａｔｉｏｎＴｅｃｈｎｏｌｏｇｙ，ＳｈａｎｘｉＵｎ...     

Laser glazing study of Co-based alloy and Ni-Nb-Cr alloy coating

ＬａｓｅｒｇｌａｚｉｎｇｓｔｕｄｙｏｆＣｏ－ｂａｓｅｄａｌｌｏｙａｎｄＮｉ－Ｎｂ－Ｃｒａｌｌｏｙｃｏａｔｉｎｇ￥ＴＩＡＮＮａｉｌｉａｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＰｈｙｓｉｃｓ，ＴｉａｎｊｉｎＩｎｓｔｉｔｕｔｅｏｆＳｃｉｅｎｃｅａｎｄＴ...     

A Pre－lasing Reliable Dynamic Filter Single－longitudinal－mode Q－switched Laser

ＡＰｒｅ－ｌａｓｉｎｇＲｅｌｉａｂｌｅＤｙｎａｍｉｃＦｉｌｔｅｒＳｉｎｇｌｅ－ｌｏｎｇｉｔｕｄｉｎａｌ－ｍｏｄｅＱ－ｓｗｉｔｃｈｅｄＬａｓｅｒＣＨＥＮＣｈａｎｇｍｉｎ（ＤｅｃａｎｔｍｅｎｔｏｆＥｌｅｃｔｒｏｎｉｃａｎｄＩｎｆｏｒｍａｔｉｏｎＴｅｃｈｎ...     

Predicting Raman Spectra with ab initio Calculations

ＰｒｅｄｉｃｔｉｎｇＲａｍａｎＳｐｅｃｔｒａｗｉｔｈａｂｉｎｉｔｉｏＣａｌｃｕｌａｔｉｏｎｓＪａｍｅｓＲ．Ｄｕｒｉｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＵｎｉｖｅｒｓｉｔｙｏｆＭｉｓｏｕｒｉ－ＫａｎｓａｓＣｉｔｙＫａｎｓａｓＣｉｔｙ，ＭＯ...     

Emission Spectrum of Two Atoms in Two-mode Multiphoton Raman Coupled Model

ＥｍｉｓｓｉｏｎＳｐｅｃｔｒｕｍｏｆＴｗｏＡｔｏｍｓｉｎＴｗｏ－ｍｏｄｅＭｕｌｔｉｐｈｏｔｏｎＲａｍａｎＣｏｕｐｌｅｄＭｏｄｅｌ￥ＦＥＮＧＪｉａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓ，ＬｉａｏｃｈｅｎｇＴｅａｃｈｅｒ＇ｓＣｏｌｌｅｇｅ，Ｓｈａｎｄ...     

Two-photon Induced UV Fluorescence in Photo-active Spiropyran Molecules

Ｔｗｏ－ｐｈｏｔｏｎＩｎｄｕｃｅｄＵＶＦｌｕｏｒｅｓｃｅｎｃｅｉｎＰｈｏｔｏ－ａｃｔｉｖｅＳｐｉｒｏｐｙｒａｎＭｏｌｅｃｕｌｅｓ￥ＣＨＩＬｕｎｇｕａｎｇ；ＷＡＮＧＺｕｇｅｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓ，ＥａｓｔＣｈｉｎａＮｏｒｍａｌＵｎ...     

Ag－Cu混合型表面的Rh6G分子的吸附态讨论

Ａｇ－Ｃｕ混合型表面的Ｒｈ６Ｇ分子的吸附态讨论王鲁川，宋常立（辽宁大学物理系沈阳１１００３６）ＤｉｓｃｕｓｓｉｏｎｆｏｒＴｈｅＡｂｓｏｒｂｉｎｇＳｔａｔｅｏｆＲｈ６ＧＭｏｌｅｃｕｌｅｓｏｎＡｇ－ＣｕＭｉｘｅｄＳｕｒｆａｃｅ￥ＷａｎｇＬｕｃｈｕａｎａｎ...     

Conservation Quantities of the Explicit Symplectic Scheme for Time-evolution of Quantum System

ＣｏｎｓｅｒｖａｔｉｏｎＱｕａｎｔｉｔｉｅｓｏｆｔｈｅＥｘｐｌｉｃｉｔＳｙｍｐｌｅｃｔｉｃＳｃｈｅｍｅｆｏｒＴｉｍｅ－ｅｖｏｌｕｔｉｏｎｏｆＱｕａｎｔｕｍＳｙｓｔｅｍＺｈｏｕＺｈｏｎｇｙｕａｎＤｉｎｇＰｅｉｚｈｕＩｎｓｔｉｔｕｔｅｏｆＡｔｏｍｉｃａｎ...     

射频阱中原子团簇离子的选择存储及其应用

ＴｒｉｐｌｅＤｉｆｅｒｅｎｔｉａｌＣｒｏｓＳｅｃｔｉｏｎｓｆｏｒＥｌｅｃｔｒｏｎＩｍｐａｃｔＩｏｎｉｚａｔｉｏｎｏｆＨｅｌｉｕｍ－ｌｉｋｅＬｉｔｈｉｕｍＳｈｉＱｉｃｕｎＣｈｅｎＺｈａｎｇｊｉｎＣｈｅｎＪｉＸｕＫｅｚｕｎＤｅｐａｒｔｍｅｎｔｏｆＭｏｄ...     

NMR analogue of the generalized Grover‘s algorithm of multiple marked states and its application

The generalized Grover's algorithm for the case in which there are multiple marked states is demonstrated on a nuclear magnetic resonance (NMR) quantum computer. The Walsh－Hadamard transform and the phase inversion are all replaced. NMR analogues of Einstein－Podolsky－Rosen states (pseudo-EPR states) are synthesized using the above algorithm.     

A study of a main—road cellular automata traffic flow model

A main-road cellular automata traffic flow model on two dimensions is presented based on the Biham－Middleton－Levine traffic model. Its evolution equations are given and the self-organization and organization cooperation phenomena in this model are also studied by using computer simulation.     

分选特殊产物微生物的喇曼光谱法

以微生物油脂和类胡萝卜素为目标产物,通过对比目标产物与普通酵母的喇曼光谱,选择喇曼光谱的1 440 cm－1谱带与1 602 cm－1谱带的信号强度比值I1440/I1602作为油脂的特征标记,选择I1157/I1654或者I1520/I1654作为类胡萝卜素的标记,采用780 nm的激光俘获、收集酵母细胞的喇曼光谱,编写VB计算机程序,实时在线识别,通过光镊的操控,筛选产类胡萝卜素酵母和油脂酵母.经细胞培养和喇曼光谱检测验证了筛选结果.为筛选有经济价值的微生物提供了一种简单快捷的创新方法.     

A novel type of ultra fast and ultra soft recovery SiGe/Si heterojunction power diode with an ideal ohmic contact

A novel type of p^+(SiGe)－n^-－n^+ heterojunction switching power diode with high-speed capability is presented to overcome the drawbacks of existing power diodes. The improvement is achieved by using a p^+－n^+ mosaic layer as a substitute for the n^+ region in the conventional p^+(SiGe)－n^-－n^+ diode to realize an `ideal ohmic' contact for electrons and holes simultaneously. Compared with conventional p^+(SiGe)－n^-－n^+ diodes, the ideal ohmic contact p^+(SiGe)－n^-－n^+ diodes have about one third of the reverse recovery time and a half of peak reverse recovery current. Furthermore, the softness factor increases nearly two times and the leakage current decreases 1－2 orders of magnitude. These improvements are achieved without resorting special process step to lower the carrier lifetime and thus the devices could be easily integrated into power ICs. The Ge percentage content of p^+(SiGe) layer is an important parameter for the optimal device design.     

Metastability of Ising spin chains with nearest—neighbour and next—nearest—neighbour interactions in random fields

One-dimensional Ising systems in random fields (RFs) are studied taking into account the nearest-neighbour and next-nearest-neighbour interactions. We investigate two distributions of RFs: binary and Gaussian distributions. We consider four cases of the exchange couplings: ferro－ferromagnetic (F－F), ferro－antiferromagnetic (F－AF), antiferro－ferromagnetic (AF－F) and antiferro－antiferromagnetic (AF－AF). The energy minima of chains of no more than 30 spins with periodic boundary conditions are analysed exactly. We found that the average number of energy minima grows exponentially with the number of spins in both cases of RFs. The energy distributions across the corresponding energy minima are shown. The effects of RFs on both the average and density of metastable states are explained. For a weak RF, the energy distributions display a multipartitioned structure. We also discuss the frustration effect due to RFs and exchange fields. Finally, the distributions of magnetization are calculated. The absolute value of magnetization averaged over all metastable states decreases logarithmically with the number of spins.     

两量子位Grover量子算法NMR脉冲序列参量的研究

从两量子位核磁共振量子计算机物理模型出发,通过解单体含时薛定谔方程和解两体含时薛定谔方程,提出了Grover量子算法核磁共振脉冲序列参量设定的两种规则,给出了具体参量取值,并进行了数值仿真,仿真结果表明：解两体薛定谔方程给出的参量设定规则,能使两量子位量子搜索的目标态是纯基态,目标态的z分量期望值精确度达到在小数点后三位与理论值完全相同,验证了我们提出的参量设定规则的正确性.     

Sub-strategy updating evolution in minority game

In this paper, we propose and study a new evolution model of minority game. Any strategy in minority game can be regarded as composed of sub-strategies corresponding to different histories. Based on the evolution model proposed by Li－Riolo－Savit, in which those agents that perform poorly may update their strategies randomly. This paper presents a new evolution model in which poor agents update their strategies by changing only a part of sub-strategy sets with low success rate. Simulation result shows that the new model with sub-strategy-set updating evolution mechanism may approach its steady state more quickly than the Li－Riolo－Savit model. In the steady state of the new model, stronger adaptive cooperation among agents will appear, implying that the social resource can be allocated more rationally and utilized more effectively compared with the Li－Riolo－Savit model.     

Quantization of the space－time with topological defect

We present the classical solution of Lagrange equations for the black hole with a global monopole or with a cosmic string. Then we obtain the wavefunction of the space－time by solving the Wheeler－De Witt equation. De Broglie－Bohm interpretation applied to the wavefunction gives the quantum solution of the space－time. In the end, the quantum effect on Hawking radiation is studied.     

Magnetic properties and magnetoresistance effect of Y1-xGdxMn6Sn6 (x=0－1) compounds

The magnetic properties and magnetoresistance effect of Y_1-xGd_xMn₆Sn₆ (x=0－1) compounds have been investigated by magnetization and resistivity measurements in the applied field range (0－5 T). Compounds with x=0.4－1 display ferrimagnetic behaviours in the whole magnetic ordering temperature range, while compounds with x=0－0.2 display a field-induced metamagnetic transition, and the threshold fields decrease with increasing Gd content. The compounds with x=0.1－0.2 undergo an antiferromagnetic to ferromagnetic transition with increasing temperature. The cell-parameter a and c and cell-volume V of compounds (x=0－1) increase with increasing Gd content. It was found that the saturation magnetization M_s of the compounds (x=0.4－1) decreases, while the ordering points of the compounds (x=0－1)increase with increasing Gd content. A large MR effect was observed in the compound with x=0.2, and the maximum absolute value of MR at 5 K under 3 T is close to 19.3%.     

Measurement of Inclusive Semileptonic Branching Fractions for D－→e－X and D0→e－X

We report a measurement of the absolutely inclusive semileptonic branching fractions of D^－ and D⁰ mesons, using a data sample of 22.3pb^－1 collected with BES detector at BEPC e⁺e^－ Collider at s=4.03GeV and based on the method of "combinative D⁺ and D⁰ single and double tags". The measured values of the branching fractions for D^－→e^－X and D⁰→e^－X are (21.8±8.5±4.2)% and (8.9±3.0±1,6)%, respectively. The measured ratio of the branching fractions is BF(D^－→e^－X)/BF(D⁰→e^－X)=2.4±1.7±0.8.