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Investigation of high power laser coatings

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光学精密工程 2005年第4期13卷 471-479页

作者： SHAO jian-da FAN zheng-xiu R＆D Center for Optical Thin Film Coating Technology Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China

High laser-induced damage threshold and large aperture were focuses on the studies of high power laser coatings. This paper reports the research activities at our center. Several measures were developed for evaluating characters of laser damage, including determination of laser induced damage threshold and detection of absorption based on surface thermal lensing technique. Defect was deemed to be the initial source of laser damage, and was the main factor restricting the laser damage resistance of optical coatings. The contribution of several kinds of typical defects to laser damage was analyzed, and some deposition measures were adopted to control and eliminate the origin of defect. Furthermore, some post-treatment methods were also employed to alleviate the influence of the defect and to improve the laser damage resistance. Correction mask was introduced to improve the thickness uniformity, and the thickness uniformity can be amended to less than 1% in the range of Φ650 mm. Preliminary investigation related to surface deformation was also conducted.

关键词：激光涂覆技术 LIDT 吸收能力激光器

Synthesis and Anti-inflammatory Action of (η-C_5H_5)_2Ti(Sal)_2 and (η-C_5H_5)_2Ti(Clo)_2

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Chemical Research in Chinese Universities 2006年第1期22卷 6-10页

作者： LI Xiu-juan ZENG zheng-zhi College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. China

Two new complexes （Cp）2Ti （Sal）2 and（Cp）2Ti（Clo）2 （Cp=Cyclopentadienyl η^5-C5H5 ）, have been synthesized in anhydrous THF by the reaction of HSal（o-hydroxybenzoic acid, salicylate acid） or HClo[N-（ m-chloro-phenyl） anthranili acid, acidum clofenamicum] with （Cp）2TiCl2 and characterized by means of elemental analyses, IR, H NMR, ^13C NMR, UV and molar conductivity. In complex （Cp）2Ti（Sal）2 or（Cp）2Ti（Clo）2, the oxygen atom of the carboxyl group coordinates to Ti（Ⅳ） in a monodentate manner. The inhibitory action of the complexes on mouse ear tumefaction caused by croton oil and rat foot granulation growth caused by cotton balls is higher than that of the corresponding ligands HSal, HClo and [ （Cp）2TiCl2 ], whereas their toxicity is lower than those of the free ligands.

关键词： Salicylate acid N-(m-Chlorophenyl) anthranilic acid Cyclopentadienyltitanium complexes Anti-in-flammatory

High-fidelity quantum memory realized via Wigner crystals of polar molecules

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Chinese Physics B 2012年第1期21卷 91-100页

作者： Xue Peng Wu jian-zhi Department of Physics Southeast UniversityNanjing 211189China

The collective excitations of spin states of an ensemble of polar molecules are studied as a candidate for high- fidelity quantum memory. To avoid the collisional properties of the molecules, they are arranged in dipolar crystals under one or two dimensional trapping conditions. We calculate the lifetime of the quantum memory by identifying the dominant decoherence mechanisms and estimating their effects on gate operations when a molecular ensemble qubit is transferred to a microwave cavity.

关键词： polar molecules quantum memory molecular dipolar crystals

Does the Belt and Road Initiative Promote Value Chain Connection Between China and the Silk Road Countries?

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Chinese Geographical Science 2021年第6期31卷 979-995页

作者： zheng zhi LIU Weidong SONG Zhouying Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing100101China Key Laboratory of Regional Sustainable Development Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing100049China

The global value chains have become the core skeleton of the global *** a large-scale international cooperation initiative,the Belt and Road Initiative(BRI hereafter)may have a significant impact on the global economic *** this context,the spatiotemporal pattern and evolution of the value chain connection of the Silk Road countries and whether the BRI will promote the value chain connections between China and these countries are important research questions for understanding the changing global economic *** paper employs input-output analysis,network analysis and difference-in-differences based on Propensity Score Matching(PSM-DID)to conduct an in-depth quantitative study of these *** results show that,first,the overall value chain connection between China and the Silk Road countries has been rising since *** the perspective of geographical distribution,Southeast Asia is the highest value chain connection region with China,and the growth in the central and eastern Europe is the most significant,whereas the central Asia is the lowest value connection *** the perspective of complex network analysis,China’s position in the network of value flow among the Silk Road countries has been increasing continuously,and it has been in the lead position since ***,the implementation of the BRI has had a significant positive influence on the overall value chain connection between China and the Silk Road countries,but this positive influence is limited to the central and eastern Europe region,whereas it is not significant in other ***,this paper suggests that to promote the development of value chain connection,the Silk Road countries need to develop more specific policies related to value *** need to be able to correctly identify the comparative advantages of the region and the types of value chains that are compatible with them and then find suitable partners and formulate targeted promotion po

关键词： the Belt and Road Initiative global value chains input-output technique pattern evolution network analysis difference-in-differences based on Propensity Score Matching(PSM-DID)

Quantum mechanical solution to spectral lineshape in strongly-coupled atom-nanocavity system

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Chinese Physics B 2022年第4期31卷 272-280页

作者： jian Zeng zhi-Yuan Li School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510641China

The strongly coupled system composed of atoms,molecules,molecule aggregates,and semiconductor quantum dots embedded within an optical microcavity/nanocavity with high quality factor and/or low modal volume has become an excellent platform to study cavity quantum electrodynamics(CQED),where a prominent quantum effect called Rabi splitting can occur due to strong interaction of cavity-mode single-photon with the two-level atomic *** this paper,we build a new quantum model that can describe the optical response of the strongly-coupled system under the action of an external probing light and the spectral *** take the Hamiltonian for the strongly-coupled photon-atom system as the unperturbed Hamiltonian H_(0)and the interaction Hamiltonian of the probe light upon the coupled-system quantum states as the perturbed Hamiltonian *** theory yields a double Lorentzian lineshape for the permittivity function,which agrees well with experimental observation of Rabi splitting in terms of spectral *** quantum theory will pave the way to construct a complete understanding for the microscopic strongly-coupled system that will become an important element for quantum information processing,nano-optical integrated circuits,and polariton chemistry.

关键词： Rabi splitting nanocavity double Lorentzian lineshape

High-voltage frequency domain spectroscopy analysis of a thermally aged XLPE submarine cable under continuous and cyclic voltage based on carrier transport and polarisation characteristics

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High Voltage 2022年第3期7卷 473-482页

作者： Xize Dai jian Hao zheng jian Ruijin Liao Xinlong zheng Yiyi Zhang State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqingChina State Grid Zhejiang Electric Power Supply Company ZhoushanChina School of Electrical Engineering Guangxi UniversityNanningChina

In order to ensure the safe operation of submarine cables,it is of great significance to analyse the insulation state of submarine cables from the perspectives of microstructure,carrier transport characteristics and macroscopic dielectric *** this study,based on the high-voltage frequency domain spectroscopy(HV-FDS)measurement system,HV-FDS experiments of fresh and thermally aged submarine cables were carried out under continuous(0.5,2,4 and 10 kV)and cyclic(2-10-2 kV)applied alternating ***,combining the changes of the microstructure structure of cross-linked poly-ethylene(XLPE)insulation,the aggregate structure deterioration model of XLPE was proposed to discuss the physical mechanism of HV-FDS characteristics of submarine cables under different voltages and insulation *** show that the HV-FDS characteristics of submarine cables have significant voltage dependence under contin-uous voltage *** HV-FDS of submarine cables show memory characteristics under cyclic voltage *** with the fresh submarine cable,the thermally aged submarine cable shows more significant voltage dependence and memory charac-teristics of *** memory characteristics of HV-FDS are mainly determined by the carriers transport and the interfacial polarisation caused by the accumulation of polar particles at the electrode/dielectric *** study covers the correlation mecha-nism among the microstructure,carrier transport and macroscopic HV-FDS properties of submarine cable insulation,which lays a foundation for further research and condition evaluation of submarine cables.

关键词： submarine characteristics transport

Maternal gene Ooep may participate in homologous recombination-mediated DNA double-strand break repair in mouse oocytes

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Zoological Research 2018年第6期39卷 387-395页

作者： Da-jian He Lin Wang zhi-Bi Zhang Kun Guo Jing-zheng Li Xie-Chao He Qing-Hua Cui Ping zheng Yunnan Key Laboratory of Animal Reproduction Kunming Institute of Zoology Chinese Academy of Sciences Kunming Yunnan 650223China Laboratory of Biochemistry and Molecular Biology School of Life Sciences Yunnan University Kunming Yunnan 650091 China Kunming College of Life Science University of Chinese Academy of Sciences Kunming Yunnan 650204 China

DNA damage in oocytes can cause infertility and birth defects. DNA double-strand breaks （DSBs） are highly deleterious and can substantially impair genome integrity. Homologous recombination （HR）-mediated DNA DSB repair plays dominant roles in safeguarding oocyte quantity and quality. However, little is known regarding the key players of the HR repair pathway in oocytes. Here, we identified oocyte-specific gene Ooep as a novel key component of the HR repair pathway in mouse oocytes. OOEP was required for efficient ataxia telangiectasia mutated （ATM） kinase activation and Rad51 recombinase （RAD51） focal accumulation at DNA DSBs. Ooep null oocytes were defective in DNA DSB repair and prone to apoptosis upon exogenous DNA damage insults. Moreover, Ooep null oocytes exhibited delayed meiotic maturation. Therefore, OOEP played roles in preserving oocyte quantity and quality by maintaining genome stability. Ooep expression decreased with the advance of maternal age, suggesting its involvement in maternal aging.

关键词： Ooep Homologous recombination DNA double-strand break repair ATM RAD51

Functions and behaviors of activated sludge extracellular polymeric substances (EPS): a promising environmental interest

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Journal of Environmental Sciences 2006年第3期18卷 420-427页

作者： TIAN Yu zheng Lei SUN De-zhi Department of Environmental Science and Engineering Harbin Institute of Technology Harbin 150090 China.

Extracellular polymeric substances （EPS） are the predominant constituents of activated sludge and represent up to 80% of the mass of activated sludge. They play a crucial role in the flocculation, settling and dewatering of activated sludge. Furthermore, EPS also show great efficiency in binding heavy metals. So EPS are key factors influencing reduction in sludge volume and mass, as well as activity and utilization of sludge. EPS are of considerable environmental interest and hundreds of articles on EPS have been published abroad, while information on EPS in China is limited. In this paper, results of over 60 publications related to constituents and characteristics of EPS and their influences on flocculation, settling and dewatering of sludge are compiled and analyzed. Metal-binding ability of EPS is also discussed, together with a brief consideration of possible research interests in the future.

关键词： activated sludge environmental interest extracellular polymeric substances (EPS)

Predictive value of serum alpha-fetoprotein for tumor regression after preoperative chemotherapy for rectal cancer

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World Journal of Gastrointestinal Oncology 2022年第2期14卷 525-532页

作者： Da-Kui Zhang Jun Qiao Shao-Xuan Chen zhi-Yong Hou jian-zheng Jie Department of General Surgery China-Japan Friendship HospitalBeijing 100029China Department of General Surgery Inner Mongolia International Mongolian HospitalHohhot 010020Inner Mongolia Autonomous RegionChina

BACKGROUND Preoperative therapy is widely used in locally advanced rectal *** can improve local control of rectal ***,there are few indicators that can predict the effect of preoperative chemotherapy *** To investigate whether the increase in serumα-fetoprotein(AFP)can predict better efficacy of preoperative *** This was a retrospective *** analyzed 125 patients admitted between 2017 and 2019 with locally advanced rectal *** patients received six cycles of preoperative chemotherapy(mFOLFOX6 every 2 wk).Serum AFP of 26 patients rose slightly after three or four cycles of chemotherapy,and fell to normal again within 2 *** other 99 patients had a normal level of serum AFP during *** were divided into two groups(AFP risen and AFP normal).According to postoperative pathology,we compared tumor regression and complete response rate between the two *** primary outcome measure was the tumor regression grade(TRG)after *** difference in pathological complete response between the two groups was also *** There were no tumor progression and distant metastasis in both groups during preoperative *** in the AFP risen group achieved better TRG 0/1 than those in the AFP normal group(61.5%vs 39.4%).The increase in AFP was a significant predictor for better tumor regression[χ2=4.144,odds ratio(OR)=2.666,P=0.04].In the AFP risen group,the complete response rate was 30.8%,which was higher than in the AFP normal group(30.8%vs 12.1%,χ2=4.542,OR=3.251,P=0.03).CONCLUSION Patients with a slight increase in serum AFP can achieve better tumor regression during preoperative chemotherapy,and are more likely to achieve pathological complete response.

关键词： Rectal cancer Preoperative chemotherapy Alpha-fetoprotein Predictive value Tumor