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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 | Long Distance Transmission of SARS-CoV-2 from Contaminated Cold Chain Products to Humans——Qingdao City,Shandong Province,China,September 2020显示文摘Summary What is already known about this topic?Though coronavirus disease 2019(COVID-19)has largely been controlled in China,several outbreaks of COVID-19 have occurred from importation of cases or of suspected virus-contaminated products.Though several outbreaks have been traced to severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)isolated on the outer packaging of cold chain products,live virus has not been obtained. | Huilai Ma Zhaoguo Wang Xiang Zhao Jun Han Yong Zhang Hong Wang Cao Chen Ji Wang Fachun Jiang Jie Lei Jingdong Song Shaofeng Jiang Shuangli Zhu Huihui Liu Dongyan Wang Yao Meng Naiying Mao Yanhai Wang Zhen Zhu Zhixiao Chen Bingling Wang Qinqin Song Haijun Du Qun Yuan Dong Xia Zhiqiang Xia Peipei Liu Yuchao Wu Zijian Feng Ruqin Gao George F.Gao Wenbo Xu | 2021 | China CDC weekly2021，3，30： | 13 |
| 3 | A new discrete Fourier transform randomness test显示文摘The randomness of random number generators(RNGs) is important for the reliability of cryptographic systems since the outputs of RNGs are usually utilized to construct cryptographic parameters.Statistical tests are employed to evaluate the randomness of the RNG outputs. The discrete Fourier transform(DFT) test is an important test item of the most popular statistical test suite NIST SP800-22. In the standard NIST DFT test and related improved studies, there exist accuracy and efficiency issues. First, the bit sequences generated by known good RNGs have a high probability to be rejected when the sequences are long or the sequence number is large, due to the deviation between the actual distribution of the test statistic values and the assumed normal distribution. Second, the long test time and high memory consumptions of the complex DFT test algorithm also affect its practicability. To solve these problems, we propose a new DFT test method for long sequences(106 or more bits). Different from the previous DFT test methods focusing on making the distribution of the test statistic values closer to the normal distribution, we reconstruct the statistic to follow the chi-square distribution. Our experiment result shows that our method has higher reliability in the two-level test, and could effectively reduce the test time and the memory consumptions.When applying our method on randomness test, the test efficiency has been increased to about 4 times for 106-bit sequences and 7 times for 107-bit sequences. In conclusion, our method has lower probability of making errors, and is more suitable for practical application scenarios. | Meihui CHEN Hua CHEN Limin FAN Shaofeng ZHU Wei XI Dengguo FENG | 2019 | Science China(Information Sciences)2019，62，3： | 3 |
| 4 | Fault Analysis on a New Block Cipher DBlock with at Most Two Fault Injections显示文摘DBlock is a new family of block ciphers proposed by Wu et al. in Science China in 2015, which consists of three variants specified as DBlock-128/192/256.DBlock-n employs a 20-round Feistel-type structure with n-bit block size and n-bit key size. We propose the first fault analysis on DBlock and show that no more than 2 pairs of correct/faulty ciphertexts are needed to retrieve the master key. In the attack, a byte-oriented fault is injected in round 16, and three properties including differential distribution of the Sbox, bijection nature of the linear function and Feistel-type key scheduling are fully utilized to distinguish between the correct and wrong keys. A fault position guessing strategy based on known intermediates is adopted, which efficiently makes the known-fault attack apply to the random fault model. The experimental results show that, with a pair of ciphertexts, 11.820-bit exhaustive search is needed to derive the whole 128-bit key on average. With 2 pairs of ciphertexts, the unique key can be determined within 6.5 minutes. | FENG Jingyi CHEN Hua GAO Si CAO Weiqiong FAN Limin ZHU Shaofeng | 2018 | Chinese Journal of Electronics2018，27，6： | 3 |
| 5 | Investigation of ion-atom collision dynamics through imaging techniques显示文摘The principle and technique details of recoil ion momentum imaging are discussed and summarized. The recoil ion momentum spectroscopy built at the Institute of Modern Physics (Lanzhou) is presented. The first results obtained at the setup are analyzed. For 30 keV He2+ on He collision, it is found that the capture of single electron occurs dominantly into the first excited states, and the related scattering angle results show that the ground state capture occurs at large impact parameters, while the capture into excited states occurs at small impact parameters. The results manifest the collision dynamics for the sub-femto-second process can be studied through the techniques uniquely. Finally, the future possibilities of applications of the recoil ion momentum spectroscopy in other fields are outlined. | MA XinWen ZHU XiaoLong LIU HuiPing LI Bin ZHANG ShaoFeng CAO ShiPing FENG WenTian XU ShenYue | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，7： | 2 |
| 6 | Mercury emission from the indigenous mercury smelting in Wuchuan mercury mining areas, Guizhou Province, China显示文摘 | Ping LI Xinbin FENG Guangle QIU Shaofeng WANG | 2006 | Chinese Journal Of Geochemistry2006，25，B08： | 2 |
| 7 | Mercury concentrations and air/soil fluxes in Wuchuan mercury mining district, Guizhou province, China显示文摘 | Shaofeng Wang Xinbin Feng Guangle Qiu Lihai Shang Ping Li Zhongqing Wei | 2007 | Atmospheric Environment2007，，28： | 1 |
| 8 | Mercury and methylmercury in riparian soil, sediments, mine-waste calcines,and moss from abandoned Hg mines in east Guizhou province, southwestern China 显示文摘 | QIU Guangle FENG Xinbin WANG Shaofeng | 2005 | Applied Geochemistry2005，20，3： | 1 |
| 9 | Characteristics of mercury exchange flux between soil and air in the heavily air-polluted area, eastern Guizhou, China显示文摘 | Shaofeng Wang Xinbin Feng Guangle Qiu Xuewu Fu Zhongqing Wei | 2007 | Atmospheric Environment2007，，27： | 1 |
| 10 | Sequence-Oriented Stochastic Model of RO-TRNGs for Entropy Evaluation显示文摘Ring oscillator-based true random number generators(RO-TRNGs) are widely used to generate unpredictable random numbers for cryptographic systems.Entropy is usually adopted to quantitatively measure the unpredictability of a TRNG. There have been several stochastic models such as the time-oriented and phaseoriented ones built to evaluate the entropy of ElementaryRO-TRNGs with single oscillator. However, these models are not suitable for the TRNGs composed of multiple oscillators(Multiple-RO-TRNGs), which can obtain more randomness and higher throughput. Considering this,we propose a sequence-oriented stochastic model for the entropy evaluation of RO-TRNGs, named the first-order stationary Markov source model. This model is extensible for the Multiple-RO-TRNGs. Based on that, we present a detailed method to determine the entropy of Multiple-ROTRNGs. Our proposed model is verified by experiments.Besides, our method can also be a guide to design ROTRNGs with both high entropy and high throughput. | ZHU Shaofeng XI Wei FAN Limin CHEN Hua CHEN Meihui FENG Dengguo | 2020 | Chinese Journal of Electronics2020，29，2： | 1 |
| 11 | Mercury contaminations from historic mining to water, soil and vegetation in Lanmuchang, Guizhou, southwestern China显示文摘 | Guangle Qiu Xinbin Feng Shaofeng Wang Tangfu Xiao | 2005 | Science of the Total Environment2005，，1： | 1 |
| 12 | Mercury emission to atmosphere from Lanmuchang Hg–Tl mining area, Southwestern Guizhou, China显示文摘 | Shaofeng Wang Xinbin Feng Guangle Qiu Zhongqing Wei Tangfu Xiao | 2005 | Atmospheric Environment2005，，39： | 1 |
| 13 | Charac- teristics of mercury exchange flux between soil and air in the heavily air-polluted area, eastern Guizhou China显示文摘 | WANG Shaofeng FENG Xinbin QIU Guangle | 2007 | Atmos- pheric Environment2007，41，27： | 1 |
| 14 | Total gaseous mercury emissions from soil in Guiyang, Guizhou, China显示文摘 | FENG Xinbin WANG Shaofeng QIU Guangle | 2005 | Journal of Geophysical Research: Atmospheres2005，110，14306： | 1 |
| 15 | Environmental contamination of mercury from Hg-mining areas in Wuchuan, northeastern Guizhoa, China 显示文摘 | QIU Guangle FENG Xinbin WANG Shaofeng | 2006 | Environmental Pollution2006，142，： | 1 |
| 16 | Mercury contaminations from historic mining to water, soil and vegetation in Lanmuchang, Guizhou, southwestern China 显示文摘 | QIU Guangle FENG Xinbin WANG Shaofeng | 2006 | Science of the Total Environment2006，368，： | 1 |
| 17 | Mercu-ry emission to atmosphere from Lanmuchang Hg-T1 mining area, South western Guizhou, China显示文摘 | WANG Shaofeng FENG Xinbin QIU Guangle | 2005 | Atmospheric Envi- ronment2005，39，39： | 1 |
| 18 | The variations of mercury in sediment profiles from a historically mercury-contaminated reservoir, Guizhou province, China显示文摘 | Haiyu Yan Xinbin Feng Lihai Shang Guangle Qiu Qianjin Dai Shaofeng Wang Yamin Hou | 2008 | Science of the Total Environment2008，，1： | 1 |
| 19 | Mercury and methylmer- cury in riparian soil, sediments, mine-waste calcines, and moss from a- bandoned Hg mines in east Guizhou Province, Southwestern China显示文摘 | Qiu Guangle Feng Xinbin Wang Shaofeng | 2005 | Applied Geochemistry2005，20，： | 1 |
| 20 | Advances in Atom Transfer Radical Polymerization of Modifi ed Grain显示文摘Atom transfer radical polymerization(ATRP)is a kind of controllable reactive radical polymerization method with potential application value.The modifi cation of graphene oxide(GO)by ATRP reaction can eff ectively control various graft polymer molecules Chain length and graft density,giving GO diff erent functionality,such as good solvent dispersibility,environmental sensitive stimulus responsiveness,biocompatibility,and the like.In this paper,ATRP reaction and GO surface non-covalent bonding ATRP polymer molecular chain were directly initiated from GO surface immobilization initiator.The ATRP reaction modified GO was reviewed,and the process conditions and research methods of ATRP modifi cation reaction were summarized,as well as pointed out the functional characteristics and application prospect of GO functionalized composites. | Changqing Cui Shaofeng Feng Liqun Zhu | 2018 | Insight-Nuclear Science2018，1，1： | 0 |
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