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| 1 | Single atom accelerates ammonia photosynthesis显示文摘Atomically dispersed metal has gained much attention because of the new opportunities they offer in catalysis. However, it is still crucial to understand the mechanism of single-atom catalysis at molecular level for expanding them to other more difficult catalytic reactions, such as ammonia synthesis from nitrogen. In fact, developing ammonia synthesis under ambient conditions to overcome the high energy consumption in well-established Haber-Bosch process has fascinated scientists for many years.Herein, we demonstrate that single Cu atom yields facile valence-electron isolation from the conjugated π electron cloud of p-CN. Electron spin resonance measurements reveal that these isolated valence electrons can be easily excited to generate free electrons under photo-illumination, thus inducing high efficient photo-induced ammonia synthesis under ambient conditions.The NH_3 producing rate of copper modified carbon nitride(Cu-CN) reached 186 μmol g^(-1) h^(-1) under visible light irradiation with the quantum efficiency achieved 1.01% at 420 nm monochromatic light. This finding surely offers a model to open up a new vista for the ammonia synthesis at gentle conditions. The introduction of single atom to isolate the valence electron also represents a new paradigm for many other photocatalytic reactions, since the most photoinduced processes have been successfully exploited sharing the same origin. | Pengcheng Huang Wei Liu Zhihai He Chong Xiao Tao Yao Youming Zou Chengming Wang Zeming Qi Wei Tong Bicai Pan Shiqiang Wei Yi Xie | 2018 | Science China Chemistry2018，61，9： | 8 |
| 2 | Nanoindentation characteristics of cement with different mineral admixtures显示文摘In order to determine the effects of different mineral admixtures including fly ash(FA),blast furnace slag(BFS) and metakaolin(MK) on hydration product phases from the nanoscale structure perspective,nanoindentation characteristics of the samples with similar 28-day strengths have been investigated.The results indicate that the volume fractions of porosity in porosity and hydration product phases of the samples with the same kind of mineral admixture are almost equal to each other,and are greater than that of the sample without mineral admixture.Mineral admixtures especially MK can decrease remarkably the volume fractions of CH in porosity and hydration product phases,and there exists a good linear relationship between the(Al+Si)/Ca molar ratio of cementitious materials chemical compositions and the volume fraction of HD C-S-H gel in C-S-H gel.Therefore,it is possible to predict the volume fraction change of HD C-S-H gel in C-S-H gel by simply calculating the(Al+Si)/Ca molar ratio of cementitious materials with similar 28-day strengths under the constant water-binder ratio. | HE ZhiHai QIAN ChunXiang ZHANG Yi ZHAO Fei HU YingBo | 2013 | Science China(Technological Sciences)2013，56，5： | 7 |
| 3 | Adaptive Resource Allocation with SVM-based Multi-hop Video Packet Delay Bound Violation Modeling显示文摘 | ZHANG Yunsheng ZHANG Yongfei SUN Shixin QIN Shiyin HE Zhihai | 2011 | Chinese Journal of Electronics2011，20，2： | 7 |
| 4 | Size distribution of wet crushed waste printed circuit boards显示文摘A wet impact crusher was used to breakdown waste printed circuit boards (PCB's) in a water medium. The relationship between the yield of crushed product and the operating parameters was established. The crushing mechanism was analyzed and the effects of hammerhead style, rotation speed, and inlet water volume on particle size distribution were investigated. The results show that the highest yield of 1 + 0.75 mm sized product was obtained with an inlet water volume flow rate of 5.97 m 3 /h and a smooth hammerhead turning at 1246.15 r/min. Cumulative undersize-product yield curves were fitted to a nonlinear function: the fitting correlation coefficient was greater than 0.998. These research results provide a theoretical basis for the highly effective wet crushing of PCB's. | Tan Zhihai He Yaqun Xie Weining Duan Chenlong Zhou Enhui Yu Zheng | 2011 | Mining Science and Technology2011，21，3： | 4 |
| 5 | A complex structure of arrestin-2 bound to a G protein-coupled receptor显示文摘Arrestins comprise a family of signal regulators of G-protein-coupled receptors(GPCRs),which include arrestins 1 to 4.While arrestins 1 and 4 are visual arrestins dedicated to rhodopsin,arrestins 2 and 3(Arr2 and Arr3)areβ-arrestins known to regulate many nonvisual GPCRs.The dynamic and promiscuous coupling of Arr2 to nonvisual GPCRs has posed technical challenges to tackle the basis of arrestin binding to GPCRs.Here we report the structure of Arr2 in complex with neurotensin receptor 1(NTSR1),which reveals an overall assembly that is strikingly different from the visual arrestin–rhodopsin complex by a 90°rotation of Arr2 relative to the receptor.In this new configuration,intracellular loop 3(ICL3)and transmembrane helix 6(TM6)of the receptor are oriented toward the N-terminal domain of the arrestin,making it possible for GPCRs that lack the C-terminal tail to couple Arr2 through their ICL3.Molecular dynamics simulation and crosslinking data further support the assembly of the Arr2‒NTSR1 complex.Sequence analysis and homology modeling suggest that the Arr2‒NTSR1 complex structure may provide an alternative template for modeling arrestin–GPCR interactions. | Wanchao Yin Zhihai Li Mingliang Jin Yu-Ling Yin Parker Wde Waal Kuntal Pal Yanting Yin Xiang Gao Yuanzheng He Jing Gao Xiaoxi Wang Yan Zhang Hu Zhou Karsten Melcher Yi Jiang Yao Cong X.Edward Zhou Xuekui Yu H.Eric Xu | 2019 | Cell Research2019，29，12： | 4 |
| 6 | Epidemiological and clinical characteristics of 35 children with COVID-19 in Beijing,China显示文摘Importance:Within the coronavirus disease 2019(COVID-19)global pandemic,more attention is warranted for whether this new infectious disease has unique manifestations in children.Objective:To retrospectively determine the epidemiological and clinical characteristics of 35 children with COVID-19 in Beijing,China.Methods:We collected data for 35 children diagnosed with COVID-19 who were admitted to Beijing Ditan Hospital from January 2020 to June 2020,and analyzed their epidemiological characteristics,clinical manifestations,laboratory examinations,chest imaging findings,treatments,and outcomes.Results:The children comprised 18 boys(51.4%)and 17 girls(48.6%)aged 6 months to 15 years.All patients had clear epidemiological history,with family clusters accounting for 28 cases(80.0%)and clear tracing of exposure to high epidemic areas in the remaining 7 cases(20.0%).Four(11.4%)patients were classified as asymptomatic,17(48.6%)as acute upper respiratory infection,and 14(40.0%)as mild pneumonia,with no severe or critical cases.Clinical manifestations were mild,including fever in 18(51.4%),cough in 14(40.0%),and nausea and diarrhea in 7(20.0%)patients.White blood cell count was mostly normal(26 cases,74.3%)or decreased(7 cases,20.0%);lymphocyte percentage was increased in 24(68.7%);neutrophil percentage was decreased in 25(71.4%);alanine aminotransferase was increased in 3(8.6%);and serum potassium was decreased in 4(11.4%).Time to negative viral nucleic acid testing was 2-42 days(mean:14.0±9.4 days).Chest imaging examination revealed that 20 patients(57.1%)had different forms of lung inflammation.Treatment was mainly isolation and nutritional support.Eleven patients were treated with interferon atomization inhalation.No patients required oxygen therapy.All 35 children were cured and discharged.Length of hospital stay was 9-54 days(mean:25.4±13.8 days).During regular follow-up after discharge,5 children showed positivity again in the viral nucleic acid test and were re-hospitalized for observation and treatment.The mean length of re-hospitalization stay was 10.8 days.Interpretation:Children with COVID-19 mainly become infected within their family,and children of all ages are generally susceptible.The disease in children is mostly mild and the prognosis is good.Nucleic acid tests in some patients become positive again after discharge,suggesting that it is of great significance to carry out centralized isolation medical observations and active nucleic acid tests in close contacts for early detection of patients and routine epidemic prevention and control. | Ming He Caiying Wang Lin Xu Huimin Zhang Yuhuan Liu Yang Zhao Shuxin He Yanlan Zhang Hongling Yang Yang Liu Min Miao Zhihai Chen Lin Pang | 2020 | Pediatric Investigation2020，4，4： | 3 |
| 7 | Feasibility Research of Using Phase Change Materials to Reduce the Inner Temperature Rise of Mass Concrete显示文摘In order to evaluate the feasibility of using phase change materials to reduce the inner temperature rise of mass concrete, the interior temperature of normal concrete specimen under semi-adiabatic curing condition was measured. The effect of embedding phase change material(PCM) and replacing water with suspension of phase change material(SPCM) as cooling fluid were compared in the experiment. The cooling effect and the affecting factors were analyzed and calculated. The research results showed that the peak of inner temperature could be decreased obviously by the method of pre-embeding PCM in concrete, however, this method is only effective in the initial stage of cement hydration process. Besides, the volume of PCM is rather big and the PCM can not be used circularly, which means that this method can only be used under special condition and the feasibility is low. When SPCM was used as cooling fluid, the interior temperature rise of mass concrete was reduced more effectively, and the temperature grads peak around the cooling pipe was also reduced. Besides, both the SPCM consumption amount and the circulation time were decreased, and most important is that the SPCM is recyclable. The technical and economical feasibility of using SPCM to reduce the inner temperature rise of mass concrete is high. | 钱春香 GAO Guibo HE Zhihai 李瑞阳 | 2015 | Journal of Wuhan University of Technology(Materials Science)2015，30，5： | 3 |
| 8 | Power-rate- distortion analysis for wireless video communication under energy constraints 显示文摘 | He Zhihai Liang Yongfang Chen Lulin | 2005 | IEEE Trans on Circuits and Systems for Video Technology2005，15，5： | 1 |
| 9 | Virtual MIMO-based cross-layer design for wireless sensor networks显示文摘 | Yuan Yong He Zhihai Chen Min | 2006 | IEEE Trans on Vehicular Technology2006，55，3： | 1 |
| 10 | Energy minimization of portable video communication devices based on power- rate-distortion optimization显示文摘 | He Zhihai Cheng Wenye Chen Xi | 2008 | IEEE Transactions on Circuit and Systems for Video Technology2008，18，5： | 1 |
| 11 | Adaptive critic design for energy minimization of portable video communication devices显示文摘 | Sun Zhao Chen Xi He Zhihai | 2010 | IEEE Transactions on Circuits and Systems for Video Technology2010，20，1： | 1 |
| 12 | A Linear Source Model and a Unified Rate Control Algorithm for DCT Video Coding 显示文摘 | He Zhihai Mitra S K | 2002 | IEEE Transactions on Circuits mad Systems for Video Technology2002，12，11： | 1 |
| 13 | Low-delay rate control for DCT video coding via p-domin source modeling显示文摘 | HE Zhihai KIM Yong Kwan Sanjit K | 2001 | IEEE Trans on CSTV2001，11，8： | 1 |
| 14 | Low-delay rate control for DCT video coding via p domain source modeling显示文摘 | HE Zhihai KIM Y K MITRA S K | 2001 | IEEE Transactions on Circuits and Systems for Video Technology2001，11，8： | 1 |
| 15 | Joint source channel rate-distortion analysis for adaptive mode selection and rate control in wireless video coding显示文摘 | He Zhihai Cai Jianfei Chen Changwen | 2002 | IEEE Transactions on CSVT2002，12，6： | 1 |
| 16 | Joint source channel rate-distortion analysis for adaptive mode selection and rate control in wireless video coding显示文摘 | He Zhihai Cai Jianfei | 2002 | Circuits and Systems for Video Tech IEEE Trans on2002，12，6： | 1 |
| 17 | A tmified rate-distortion analysis framework for transform coding显示文摘 | He Zhihai Mitra S K | 2001 | IEEE Trans CSVT2001，11，12： | 1 |
| 18 | Low-delay rate control for DCT video coding via p-domain source modeling显示文摘 | HE Zhihai KIM Yong Kwan Sanjit K | 2001 | IEEE Trans on CSTV2001，11，8： | 1 |
| 19 | Genome-Wide search for loss of heterozygosity in Chinese patients with sporadic colorectal cancer显示文摘 | Zhihai Peng Fang Zhang Chongzhi Zhou Yun Ling Shaochun Bai Wanqing Liu Guoqiang Qiu Lin He Liwei Wang Daoyan Wei Edward Lin Keping Xie | 2003 | International Journal of Gastrointestinal Cancer2003，，1： | 1 |
| 20 | Re- construction for distributed video coding: a context-adap- tive Markov random field approach 显示文摘 | Wyner-Ziv coding of too- Pacific Grove CA USA : Zhang Yongsheng Xiong Hongkai He Zhihai | 2011 | IEEE Transac- tions on Circuits and Systems for Video Technology2011，21，8： | 1 |
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