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| 1 | COVID-19 Outbreak Caused by Contaminated Packaging of Imported Cold-Chain Products—Liaoning Province,China,July 2020显示文摘Summary What is known about this topic?Few major outbreaks of coronavirus disease 2019(COVID-19)have occurred in China after major nonpharmaceutical interventions and vaccines have been deployed and implemented.However,sporadic outbreaks that had high possibility to be linked to cold chain products were reported in several cities of China..What is added by this report?In July 2020,a COVID-19 outbreak occurred in Dalian,China.The investigations of this outbreak strongly suggested that the infection source was from COVID-19 virus-contaminated packaging of frozen seafood during inbound unloading personnel contact.What are the implications for public health practice?Virus contaminated paper surfaces could maintain infectivity for at least 17–24 days at-25℃.Exposure to COVID-19 virus-contaminated surfaces is a potential route for introducing the virus to a susceptible population.Countries with no domestic transmission of COVID-19 should consider introducing prevention strategies for both inbound travellers and imported goods.Several measures to prevent the introduction of the virus via cold-chain goods can be implemented. | Huilai Ma1 Jianqun Zhang Ji Wang Ying Qin Cao Chen Yang Song Liang Wang Jun Meng Lingling Mao Fengqin Li Ning Li Jian Cai Yong Zhang Dayan Wang Yunting Xia Hong Wang Shaofeng Jiang Xiang Zhao Peihua Niu Wenjie Tan Tao Ma Yecheng Yao Naiying Mao Zhen Zhu Tianjiao Ji Qian Yang Baoying Huang Li Zhao Jianxing Yu Li Bai Shuangli Zhu Dongyan Wang Yan Zhang Yingwei Sun Mingchun Luan Yanhai Wang Haibo Sun Shihong Yang Zhijian Bo Xiang Ren Zhongjie Li George Fu Gao Wei Yao Wenqing Yao Zijian Feng Wenbo Xu | 2021 | China CDC weekly2021，3，21： | 16 |
| 2 | Improved form of wind wave frequency spectrum显示文摘The lower frequency part of the theoretical wind wave spectrum proposed by the authors (Wen et al. , 1988a, b,c) has been improved and the form of spectrum is appreciably simplified. In addition to the field data collected in the Bohai Sea region and used in the previous papers, those obtained in the Huanghai Sea, the East China Sea and the South China Sea have been employed so that the improved spectra can be verified on a more extensive observational basis. Computed results agree with the observations well. Further comparisons have been made between the proposed spectra and the JONSWAP spectrum. Though the two types of spectrum are close to each other in form, the former shows, as a whole, better agreement with the observation than the latter. By introducing an improved relation between the peak-ness factor and significant wave steepness, the spectrum contains only significant wave height and period as parameters. For spectra given in this form, the computed peak frequencies coincide approximately | Wen Shengchang (S. C. Wen ), Zhang Dacuo, Guo Peifang, Wang Wei, Chen Bohai and Tai Weitao Institute of Physical Oceanography, Ocean University of Qingdao, China | 1989 | Acta Oceanologica Sinica1989，8，4： | 10 |
| 3 | The reaction of perfluoroalkanesulfonyl halides Ⅷ. A mild method for introducing BrCF_2 group to organic molecules显示文摘BrCF2SO2Br, prepared from sulfinatodehalogenation of CF2Br2 followed by bromination ofthe intermediate BrCF2SO2Na, was shown to be a mild and efficient bromodifluoromethylating agent. | HUANG, Wei-Yuan ZHANG, Han-Zhong Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032 | 1992 | Chinese Journal of Chemistry1992，10，3： | 3 |
| 4 | Emission Enhancement of Fluorescent Molecules by Antireflective Arrays显示文摘Traditional fluorescence enhancement based on a match of the maximum excitation or emission of fluorescence molecule with the spectra of the nanostructure can hardly enhance blue and red fluorescent molecules.Here,an enhanced method which is a new strategy based on the antireflective array has been developed to enhance the emission of blue and red fluorescent molecules.The fluorescence emission is enhanced by increasing the absorption at excitation wavelengths of the fluorescent molecules and reducing the fluorescent energy dissipation with an antireflective array.By introducing the antireflective arrays,the emission enhancement of blue and red fluorescent molecules is,respectively,up to 14 and 18 fold.It is a universal and effective strategy for enhancing fluorescence emission,which could be applied to enhance the intensity of organic LED and imaging. | Hongbo Xu Lingxiao Liu Fei Teng Nan Lu | 2019 | Research2019，，1： | 2 |
| 5 | Intra-cavity round-trip loss measurement of all-solid-state single-frequency laser by introducing extra nonlinear loss显示文摘A scheme for measuring the intra-cavity round-trip loss of an all-solid-state single-frequency laser by inserting a type-I noncritical phase-matching nonlinear crystal introducing nonlinear loss into the resonator is presented.The intra-cavity round-trip loss is theoretically deduced by analyzing the dependence of the fundamental-wave(FW) and second-harmonic-wave(SHW) powers on the pump factor and the nonlinear conversion factor of the single-frequency laser and experimentally measuring them by recording different FW and SHW powers, which are decided by the temperature of the nonlinear crystal. The measured intra-cavity round-trip loss and pump factor are 4.84% and 6.91% W-1, respectively. The standard deviations of the measured intra-cavity round-trip loss and the pump factor are 0.26% and 0.07%, respectively. This scheme is very suitable for measuring the intra-cavity round-trip loss of a high-gain solid-state single-frequency laser. | 郭永瑞 卢华东 尹祺巍 苏静 | 2017 | Chinese Optics Letters2017，15，2： | 2 |
| 6 | A NOTE ON THE NUMBER OF CUBIC PLANAR MAPS显示文摘This note shows that the number of rooted cubic planar maps (loops and multi-edges are allowed) with 2n-3 non-root-vertices, n≥3, | 刘彦佩 | 1992 | Acta Mathematica Scientia1992，12，3： | 2 |
| 7 | Generalized Available Potential Energy显示文摘The kinetic energy generation in either the dry or moist atmosphere may be estimated by the same relationships if we introduce the new concept of generalized available potential energy. The largest magnitude of generalized available potential energy and corresponding reference state of either dry or moist atmosphere are calculated in terms of the mitial conditions and entropy variation of the atmosphere. The obtained relationships are applicable for the statically unstable atmosphere as well. The generalized available potential energy associated with reversible processes reaches the maximum with respect to same initial state. While the generation of kinetic energy in irreversible processes is characterized by sudden changes. When the reference state is assumed to be saturated, we may predict the final temperature and moisture fields corresponding to provided initial state and entropy variation. | Yong.L.McHall | 1990 | Advances in Atmospheric Sciences1990，7，4： | 1 |
| 8 | THE HEAT KERNEL OF A BALL IN C^n显示文摘By introducing the horosphere coordinate of a unit ball Bn in Cn and an integraltransformation formula of functions in such coordidates,the author constructs the heatkernel HBn(z,w,t)of the heat equation associated to the Bergman metric of Bn.That iswhere cn is a well-defined constant and r(z,w)is the geodesic destance of two points zand w of Bn and t∈ R+.Sincethenis the Green function of the topological product space Bm×Bn. | 陆启铿 | 1990 | Chinese Annals of Mathematics,Series B1990，11，1： | 1 |
| 9 | Sulfur-resistant methanation over MoO_3/CeO_2–ZrO_2 catalyst: Influence of Ce-addition methods显示文摘In this paper, Ce_(0.2)Zr_(0.8)O_2 composite supports were prepared by different Ce-addition methods including impregnation of cerium(CeZr-imp), impregnation of citric acid and cerium(CeZr-CA) simultaneously and deposition precipitation method(CeZr-DP), respectively. The as-prepared supports were applied to prepare 10 wt% MoO_3/Ce_(0.2)Zr_(0.8)O_2 catalysts for sulfur-resistant methanation. The N_2 adsorption/desorption,X-ray diffraction(XRD), Raman spectroscopy(RS), X-ray photoelectron(XPS), temperature-programmed reduction by hydrogen(H_2-TPR) were undertaken to get textural properties, morphological information and structures of the catalysts. The results showed that Mo O_3 was highly dispersed on the surface of these three supports and Ce was mostly of coexisted in Ce^(4+)/Ce^(3+) redox pairs. Compared with Mo/CeZrimp, the CO conversion increased by 10% and 15% for Mo/CeZr-CA and Mo/CeZr-DP, respectively. This was mainly attributed to the larger specific surface area, Ce^(3+) concentration and content of active MoS_2 on the surface of catalysts. | Zhaopeng Liu Yan Xu Zhenhua Li Baowei Wang Weihan Wang Xinbin Ma Renjie Liu | 2019 | Journal of Energy Chemistry2019，28，1： | 1 |
| 10 | 组织器官“万能胶”显示文摘Suturing and stapling are the most comm on fixation procedures employed for wound closure after critical injuries or surgery[1,2].Such procedures require penetration in the tissues,thus may cause infections,induce strain and raise potential aesthetic issues[3,4].Sutureless approaches seem to be much more appropriate fixation methods through producing an adhesive con tact at the surface between tissues and adhesives under physiological conditions[5-7],The existing adhesives,such as liquids or hydrogels,mostly depend on introducing binding interactions between hydrogel molecules and the polymer networks of tissues through the interfacial water[8,9]. | 陈国璞 赵远锦 | 2020 | Science Bulletin2020，65，6： | 1 |
| 11 | Cryptanalysis of Quantum Secure Direct Communication and Authentication Scheme via Bell States显示文摘The security of the quantum secure direct communication(QSDC)and authentication protocol based on Bell states is analyzed.It is shown that an eavesdropper can invalidate the authentication function,and implement a successful man-in-the-middle attack,where he/she can obtain or even modify the transmitted secret without introducing any error.The particular attack strategy is demonstrated and an improved protocol is presented. | 高飞 秦素娟 郭奋卓 温巧燕 | 2011 | Chinese Physics Letters2011，28，2： | 1 |
| 12 | Catalysts and thermodynamic coupling of chemical reactions显示文摘The condition of occurrence of the thermodynamic coupling of chemical reactions isanalysed from kinetics. It is found that the thermodynamic coupling is impossible for those reactionswhich obey kinetically the mass action law. The thermodynamic coupling of chemical reactionsis further analysed in the case with catalyst. It is found that the thermodynamic coupling which isimpossible without catalyst may become possible by introducing proper catalyst into the system. Thisimplies that the catalysts can change not only the rates of chemical reactions, but also the behaviorsof thermodynamic coupling of chemical reactions, including the direction of some reactions. Suchrole of catalysts comes into play not by changing the total free energy of the system, but by changingthe reaction mechanism. | LI Ru-Sheng, Department of Chemistry, Tsinghua University, Beijing | 1989 | Acta Chimica Sinica English Edition1989，7，4： | 1 |
| 13 | SOCIETY显示文摘High Tea Time!A volunteer shoots a video introducing Yunwu tea,literally mea ning cloud and mist tea,to boost on line sales at a tea garden on Anding Mountain of Lishan Town in Hangzhou,Zhejiang Province,on April 8.Local authorities have implemented various measures to improve the added value of the tea and increase local incomes. | | 2022 | Beijing Review2022，65，16： | 0 |
| 14 | THE NOTWIST Endless Invention显示文摘Every band has their own story,but if you tracked the progress of all the world's best indie bands,some patterns might start to emerge.First comes the period of raw energy and potential,followed by the acclaimed breakout album,followed by a change in the band's sound(usually by introducing electronic elements)and accusations of selling out.By their seventh,eighth or ninth album,the band either makes a high-profile comeback with a new fan base,or they fade into obscurity. | Erica Martin | 2017 | 城市漫步(GBA版)2017，，5： | 0 |
| 15 | British Journal of General Practice 2016年1月目次选登显示文摘·Safer'chemsex':GPs'role in harm reduction for emerging forms of recreational drug use安全"chemsex":全科医生在减少新兴形式毒品伤害方面的作用·Managing older people's alcohol misuse in primary care初级医疗对老年人乙醇滥用的管理·The role of general practice in following up patients with trauma全科医生在创伤患者随访中的作用·Rhetoric and reality in person-centred care:introducing the House of Care framework以人为中心护理的修辞和现实: | 本刊编辑部 | 2016 | 中国全科医学2016，19，6： | 0 |
| 16 | Cryptanalysis and Improvement of a Quantum Network System of QSS-QDC Using χ-Type Entangled States显示文摘In the paper[Chin.Phys.Lett.29(2012)050303]of Hong et al.,two quantum secret sharing protocols were proposed.We study the security of the second protocol and find that it is insecure.Acting as the communication center,Trent may eavesdrop Alice's secret messages without introducing any error.Finally,a feasible improvement of the second protocol is given. | 高干 方鸣 程木田 | 2012 | Chinese Physics Letters2012，29，11： | 0 |
| 17 | Editor’s Note显示文摘This year has flown by,and I’m guessing for you as well.In 2020,I had planned on seeing a good friend in Japan,meeting up with my brother and sister-in-law in Thailand and introducing my mom to my current hometown of Guangzhou.COVID-19 had another agenda,and my plans,like many of yours,were blown into oblivion. | Ryan Gandolfo | 2020 | 城市漫步(GBA版)2020，，12： | 0 |
| 18 | MIKE DYNAN Bringing the Best British Brands to China显示文摘For decades,British brands have made a mark in the hearts and minds of Chinese consumers and established themselves as a symbol for quality.But besides household names like Rolls-Royce,Twining's and Burberry,the Brits still have a lot more to offer.Dozens of UK lifestyle,fashion,design,technology and food brands that have yet to enter the Chinese market will be featured in the upcoming Best of British Show in Shanghai.Ahead of the show,Mike Dynan,managing director of Media 10 China,an enthusiast of all things British and an expert in introducing global brands to the Middle Kingdom,talks to us about the unique virtues of British brands,and shares a few success stories that he has witnessed firsthand over his last 10 years spent in China. | Dominic Ngai | 2017 | 城市漫步(上海版、英文)2017，，8： | 0 |
| 19 | MIKEDYNAN BringingtheBest of British to China Interview显示文摘For decades,British brands have made a mark in the hearts and minds of Chinese consumers and established themselves as a symbol for quality.But besides household names like Rolls-Roycejwiningsand Burberry,the Brits still have a lot more to offer.Dozens of UK lifestyle,fashion,design,technology and food brands that have yet to enterthe Chinese market will be featured in the up coming Best of British Show in Shanghai.Ahead of the show,Mike Dynan,managing director of Media 10 China,an enthusiast of all things British and an expert in introducing global brands to the Middle Kingdonijalks to us about the unique virtues of British brands,and shares a few success stories that he has witnessed firsthand over his last 10 years spent in China. | Dominic Ngai | 2017 | 城市漫步(GBA版)2017，，8： | 0 |
| 20 | Unified Description of the EMC Effect and Nuclear Shadowing Effect显示文摘The parton evolution model is improved by using the modified Alteralli-Parisi equation which can describe the nuclear shadowing and antishadowing effects in the small x region.Within the theoretical framework of the improved parton evolution modelt the unified description of the European Muon Collaboration(EMC)effect,and nuclear shadowing and antishad owing effects is given without introducing the nuclear shadowing factor. | LI Guanglie SHEN Jianping YU Mingjian | 1993 | Chinese Physics Letters1993，10，11： | 0 |
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