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| 1 | Synthesis of novel nanomaterials and their application in efficient removal of radionuclides显示文摘With the development of nuclear energy, large amounts of radionuclides are inevitably released into the natural environment. It is necessary to eliminate radionuclides from wastewater for the protection of environment. Nanomaterials have been considered as the potential candidates for the effective and selective removal of radionuclides from aqueous solutions under complicated conditions because of their high specific surface area, large amounts of binding sites, abundant functional groups, pore-size controllable and easily surface modification. This review mainly summarized the recent studies for the synthesis, fabrication and surface modification of novel nanomaterials and their applications in the efficient elimination and solidification of radionuclides,and discussed the interaction mechanisms from batch experiments, spectroscopy analysis and theoretical calculations. The sorption capacities with other materials, advantages and disadvantages of different nanomaterials are compared, and at last the perspective of the novel nanomaterials is summarized. | Xiangxue Wang Long Chen Lin Wang Qiaohui Fan Duoqiang Pan Jiaxing Li Fangting Chi Yi Xie Shujun Yu Chengliang Xiao Feng Luo Jun Wang Xiaolin Wang Changlun Chen Wangsuo Wu Weiqun Shi Shuao Wang Xiangke Wang | 2019 | Science China Chemistry2019，62，8： | 20 |
| 2 | Space Astronomy in China: 2002-2004显示文摘More and more proposals, or potential projects have been proposed in recent two years. We try to briefly outline these new proposals, although most of them are in fact only in their conception studies. The progress of previously mentioned projects, like Space Solar Telescope (SST), the Hard X-ray Modulation Telescope (HXMT), as well as newly initiated LUnar Resource Explorer (LUREX), will be introduced elsewhere. | GAN Weiqun XUE Suijian | 2004 | 空间科学学报2004，24，z1： | 10 |
| 3 | Space Astronomy in China During 2004 - 2006显示文摘For the past two years, some real progress has been made in Chinese Space Astronomy, though we have not launched any missions exclusively belonging to the scope of Astronomy. In order to program the next five years' national plan (2006-2010), the Chinese Space Agency organized a series of authorized evaluations for the future missions. Among more than ten astronomical mission proposals, several were selected to give the green light to continue for their Phase A studies. We try to briefly outline these proposals. | GAN Weiqun | 2006 | 空间科学学报2006，26，z1： | 8 |
| 4 | Occurrence and infection risk of waterborne pathogens in Wanzhou watershed of the Three Gorges Reservoir, China显示文摘The Three Gorges Reservoir (TGR), formed by China's Yangtze Three Gorges Project, is the largest lake in the world, but there is too little information available about fecal contamination and waterborne pathogen impacts on this aquatic ecosystem. During two successive 1-year study periods (July 2009 to July 2011), the water quality in Wanzhou watershed of the TGR was tested with regard to the presence of fecal indicators and pathogens. According to Chinese and World Health Organization water quality standards, water quality in the mainstream was good but poor in backwater areas. Salmonella, Enterohemorrhagic Escherichia coli (EHEC), Giardia and Cryptosporidium were detected in the watershed. Prevalence and concentrations of the pathogens in the mainstream were lower than those in backwater areas. The estimated risk of infection with Salmonella, EHEC, Cryptosporidium, and Giardia per exposure event ranged from 2.9 × 10 -7 to 1.68 × 10-5 , 7.04 × 10-10 to 2.36 × 10-7 , 5.39 × 10-6 to 1.25 × 10-4 and 0 to 1.2 × 10-3 , respectively, for occupational divers and recreational swimmers exposed to the waters. The estimated risk of infection at exposure to the 95% upper confidence limit concentrations of Salmonella, Cryptosporidium and Giardia may be up to 2.62 × 10-5 , 2.55 × 10-4 and 2.86 × 10-3 , respectively. This study provides useful information for the residents, health care workers and managers to improve the safety of surface water and reduce the risk of fecal contamination in the TGR. | Guosheng Xiao Zhaodan Wang Ji'an Chen Zhiqun Qiu Yanjie Li Junsheng Qi Wenyi Liu Weiqun Shu | 2013 | Journal of Environmental Sciences2013，25，9： | 7 |
| 5 | Space Astronomy in China:2006—2008显示文摘In 2006 to 2008,the main activities in Chinese space astronomy focus on:(1) undertaking some missions set by CNSA,like HXMT,SMESE,WSO/UV,SST,KUAFU,and so on;(2) drawing up a long-term plan of Chinese space astronomy.This paper summarizes in brief all these activities. | GAN Weiqun | 2008 | 空间科学学报2008，28，5： | 7 |
| 6 | Space Solar Physics in China:2014-2016显示文摘The activities of Chinese space solar physics in 2014—2016 were mainly undertaken within the framework of Strategic Priority Program on Space Science,sponsored by CAS,which include:to accomplish the last version for the mid and long-term(2016—2030) plan of Chinese space solar physics;to subsidy a few of pre-study projects of space solar physics;to implement two intensive study projects,ASO-S and SPORT.This paper summarizes these activities briefly. | GAN Weiqun | 2016 | 空间科学学报2016，36，5： | 7 |
| 7 | Effectiveness of Traditional Chinese Medicine (TCM) treatments on the cognitive functioning of elderly persons with mild cognitive impairment associated with white matter lesions显示文摘 | Songming HE Lijun LI Juying HU Qiaoli CHEN Weiqun SHU | 2015 | 上海精神医学2015，27，5： | 7 |
| 8 | Space Astronomy in China:2008-2010显示文摘In 2008 to 2010,the main activities in Chinese space astronomy were focused on:fulfilling the long-term plan of Chinese space astronomy;initiating the long-term plan of Chinese space astronomy;undertaking some astronomical missions set by CNSA in 'Development Program of Space Science for 2006-2010'.This paper summarizes in brief all these activities. | Gan Weiqun Zhang Shuangnan Yan Yihua Chang Jin | 2010 | 空间科学学报2010，30，5： | 7 |
| 9 | China’s Space Astronomy and Solar Physics in 2011—2012显示文摘In the first part of this paper,we describe briefly the mid and long-term plan of Chinese space astronomy,its preliminary study program,the current status of satellite missions undertaken, and the current status of astronomy experiments in China's manned space flight program.In the second part,the recent research progress made in the fields of solar physics is summarized briefly, including solar vector magnetic field,solar flares,CME and filaments,solar radio and nonthermal processes,EUV waves,MHD waves and coronal waves,solar model and helioseismology,solar wind and behavior of solar cycle. | ZHANG Shuangnan YAN Yihua GAN Weiqun | 2012 | 空间科学学报2012，32，5： | 7 |
| 10 | Methane and nitrous oxide emissions in rice-crab culture systems of northeast China显示文摘Rice-crab integrated ecosystem has been confirmed to improve the ecological environment and brought greater economic benefits.In order to know greenhouse gases methane(CH_(4))and nitrous oxide(N_(2)O)emissions in ricecrab system,they were quantified from a flooding rice field in northeast China,as affected by integrated ricecrab cultivation.Three treatments with three replications each were given:(1)RC1-rice with crab(megalopa),(2)RC2-rice with crab(juvenile),(3)RM-rice only.Seasonal CH_(4) and N_(2)O fluxes were measured by closed chamber method.Compared with RM treatment,RC1 and RC2 treatments greatly enhanced the cumulative seasonal CH_(4) emissions(by 36.8%and 29.2%,respectively),and reduced the cumulative seasonal N_(2)O emissions(by 28.2%and 19.7%,respectively).Across treatments,CH_(4) represented over 97%of total global warming potential(GWP)and as a result,RC1 and RC2 treatments significantly increased the GWP than RM treatment.Although the GWP was highest in RC1 treatment,it provided highest rice yield(8780 kg/ha)and net ecosystem economic budget(NEEB,23,159 Yuan/ha)over RM(7668 kg/ha,15,130 Yuan/ha)and RC2(8042 kg/ha,18,713 Yuan/ha)treatments.To summarize,cultivation of megalopa in rice field is a better strategy to optimize the economic and environmental benefits in northeast China. | Ang Wang Xuzhou Ma Jing Xu Weiqun Lu | 2019 | Aquaculture and Fisheries2019，4，4： | 6 |
| 11 | Mesoporous silica SBA-15 functionalized with phosphonate and amino groups for uranium uptake显示文摘Mesoporous silicas have a very attractive ability of sorption and enrichment of metal ions due to their huge surface area and facile functionalization by organic ligands.In this work,phosphonate-amino bifunctionalized mesoporous silica SBA-15(PA-SBA-15) as U(VI) sorbent was fabricated through post-grafting method.The obtained mesoporous silica was characterized by SEM,XRD,NMR and nitrogen sorption/desorption experiments,which revealed the existence of ordered mesoporous structure with uniform pore diameter and large surface area.The adsorptivity of PA-SBA-15 for U(VI) from aqueous solution was investigated using batch sorption technique under different experimental conditions.The preliminary results show that the U(VI) sorption by PA-SBA-15 is very quick with equilibrium time of less than 1 h,and the U(VI) uptake is as large as 373 mg/g at pH 5.5 under 95 ℃.The sorption isotherm has been successfully modeled by the Langmuir isotherm,suggesting a monolayer homogeneous sorption of U(VI) in PA-SBA-15.The sorption is pH-dependent due to the pH-dependent charge of sorbent in the aqueous solution.The thermodynamics research shows that the sorption is a feasible and endothermic process.Based on these results,PA-SBA-15 could be a promising solid phase sorbent for highly-efficient removal of U(VI) ions from waste water and enrichment of U(VI) from a solution at a very low level. | WANG XiaoLiang YUANLiYong WANG YanFei LI ZiJie LIU YaLan FENG YiXiao ZHAO YuLiang CHAI ZhiFang SHI WeiQun | 2012 | Science China Chemistry2012，55，9： | 6 |
| 12 | Robot assisted rehabilitation of the arm after stroke:prototype design and clinical evaluation显示文摘Robot assisted rehabilitation training is a promising tool for post-stroke patients' recovery, and some new challenges are imposed on robot design, control, and clinical evaluation. This paper presents a novel upper limb rehabilitation robot that can provide safe and compliant force feedbacks to the patient for the benefits of its stiff and low-inertia parallel structure, highly backdrivable capstan-cable transmission, and impedance control method in the workspace. The 'assist-as-needed'(AAN) clinical training principle is implemented through the 'virtual tunnel' force field design, the 'assistance threshold' strategy, as well as the virtual environment training games, and preliminary clinical results show its effectiveness for motor relearning for both acute and chronic stroke patients, especially for coordinated movements of shoulder and elbow. | Liang PENG Zeng-Guang HOU Long PENG Lincong LUO Weiqun WANG | 2017 | Science China(Information Sciences)2017，60，7： | 6 |
| 13 | Rules for confidence intervals of permeability coefficients for water flow in over-broken rock mass显示文摘Based on the steady-state seepage method, we used the Mechanical Testing and Simulation 815.02 System and a self-designed seepage instrument for over-broken stone to measure seepage properties of water flows in three types of crushed rock samples. Three methods of confidence interval in describing permeability coefficients are presented: the secure interval, the calculated interval and the systemic interval. The lower bound of the secure interval can be applied to water-inrush and the upper bound can solve the problem of connectivity. For the calculated interval, as the axial pressure increases, the length of confidence interval is shortened and the upper and lower bounds are reduced. For the systemic interval, the length of its confidence interval, as well as the upper and lower bounds, clearly vary under low axial pressure but are fairly similar under high axial pressure. These three methods provide useful information and references for analyzing the permeability coefficient of over-broken rock. | Liu Weiqun Fei Xiaodong Fang Jingnian | 2012 | International Journal of Mining Science and Technology2012，22，1： | 6 |
| 14 | Space Solar Physics in China显示文摘The activities of Chinese space solar physics in 2016–2018 can be divided into two categories: prestudy projects and mission-level projects. Both projects were undertaken smoothly. Especially the ASO-S,after several years' promotion, finally got formal approval at the end of 2017. This paper describes in brief the status of all related projects. | GAN Weiqun FAN Quanlin | 2018 | 空间科学学报2018，38，5： | 5 |
| 15 | Space Solar Physics in 2012-2014显示文摘The main activities of Chinese space solar physics in 2012–2014 include: to continue studying the mid and long-term(2016–2030) plan of Chinese space solar physics; to arrange a group of pre-study projects of space solar physics; to initiate and continue a few solar mission-level projects.This paper summarizes all these activities briefly. | Gan Weiqun | 2014 | 空间科学学报2014，34，5： | 5 |
| 16 | Solvent extraction of U(VI) by trioctylphosphine oxide using a room-temperature ionic liquid显示文摘The unique physical and chemical properties of room-temperature ionic liquids(RTILs) have recently received increasing attention as solvent alternatives for possible application in the field of nuclear industry, particularly in liquid-liquid separations of radioactive nuclides. We investigated solvent extraction of U(VI) from aqueous solutions into a commonly used ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide([C4mim][NTf2]) using trioctylphosphine oxide(TOPO) as an extractant. The effects of contact time, TOPO concentration, acidity, and nitrate ions on the U(VI) extraction are discussed in detail. The extraction mechanism was proposed based on slope analysis and UV-Vis measurement. The results clearly show that TOPO/[C4mim][NTf2] provides a highly efficient extraction of U(VI) from aqueous solution under near-neutral conditions. When the TOPO concentration was 10 mmol/L, the extraction of 1 mmol/L U(VI) was almost complete(> 97%). Both the extraction efficiency and distribution coefficient were much larger than in conventional organic solvents such as dichloromethane. Slope analysis confirmed that three TOPO molecules in [C4mim][NTf2] bound with one U(VI) ion and one nitrate ion was also involved in the complexation and formed the final extracted species of [UO2(NO3)(TOPO)3]+. Such a complex suggests that extraction occurs by a cation-exchange mode, which was subsequently evidenced by the fact that the concentration of C4mim+ in the aqueous phase increased linearly with the extraction percent of U(VI) recorded by UV-Vis measurement. | YUAN LiYong SUN Man LIAO XiangHong ZHAO YuLiang CHAI ZhiFang SHI WeiQun | 2014 | Science China Chemistry2014，57，11： | 4 |
| 17 | Validation of hyperintense middle cerebral artery sign in acute ischemic stroke Comparison between magnetic resonance imaging and angiography显示文摘We performed a retrospective analysis of non-contrast computed tomography (CT) scans, immediately subsequent magnetic resonance imaging (MRI), and cerebral angiography data from 30 consecutive patients with acute ischemic stroke within 6 hours after symptom onset. Results showed that eleven patients developed subsequent hemorrhagic transformation at follow-up. A hyperintense middle cerebral artery sign on MRI was found in six hemorrhagic patients, all of who had acute thrombosis formation on magnetic resonance angiography and digital subtraction angiography. No patients in the non-hemorrhagic group had hyperintense middle cerebral artery sign on MRI. The sensitivity, specificity, and positive predictive values of the hyperintense middle cerebral artery sign on MRI T1-weighted image for subsequent hemorrhagic transformation were 54.5%, 100%, and 100% respectively. Hyperdense middle cerebral artery sign on non-contrast CT was observed in nine patients, five of who developed hemorrhagic transformation. These data suggest that hyperintense middle cerebral artery sign on MRI T1-weighted image is a highly specific and moderately sensitive indicator of subsequent hemorrhagic transformation in patients after acute ischemic stroke, and its specificity is superior to CT. | Gang Guo Yonggui Yang Weiqun Yang | 2012 | Neural Regeneration Research2012，7，3： | 4 |
| 18 | Easily prepared and stable functionalized magnetic ordered mesoporous silica for efficient uranium extraction显示文摘Functionalized magnetic Fe_3O_4@SiO_2 composite nanoparticles were prepared by simply embedding iron oxide nanoparticles into MCM-41 through one-step synthesis process, followed by aminopropyls grafting on the mesopore channels, aiming to efficiently and conveniently uptake U(VI) from aqueous solution. The resultant material possesses highly ordered mesoporous structure with large surface area, uniform pore size, excellent thermal stability, quick magnetic response, and desirable acids resistance, confirmed by Fourier transform infrared spectroscopy(FTIR), scanning electron microscopy(SEM), N_2 adsorption/desorption experiments, powder X-ray diffraction(PXRD), and thermogravimetric analysis(TGA). Detailed U(VI) sorption test indicated that this material is indeed an effective U(VI) sorbent with fast sorption kinetics of less than 2 h, large sorption capacity of 160 mg/g at p H 5.0±0.1, and desirable selectivity towards U(VI) ions over a range of competing metal ions. The absorbed U(VI) can be easily desorbed by 0.01 mol/L or more concentrated HNO_3 solution, and the reclaimed sorbent can be reused with no obvious decrease of sorption capacity even after 4 sorption-desorption cycles. The present results suggest the vast opportunities of this kind of magnetic composite on the solid-phase extraction of U(VI). | Wenlu Guo Changming Nie Lin Wang Zijie Li Lin Zhu Liuzheng Zhu Zhentai Zhu Weiqun Shi Liyong Yuan | 2016 | Science China Chemistry2016，59，5： | 3 |
| 19 | Phosphonate-Decorated Covalent Organic Frameworks for Actinide Extraction: A Breakthrough Under Highly Acidic Conditions显示文摘Although solid-phase extraction is a useful approach for metal ion separation from aqueous solutions,existing sorbents suffer from low extraction effici-encies and/or instability when in contact with strong acidic media.We report here the first study on rational design and fabrication of phosphonate-decorated covalent organic frameworks,COF-IHEP1 and COF-IHEP2,for efficient and selective extraction of of uranium(VI)[U(VI)]and plutonium(IV)[Pu(IV)]from highly acidic solutions. | Jipan Yu Liyong Yuan Shuai Wang Jianhui Lan Lirong Zheng Chao Xu Jing Chen Lin Wang Zhiwei Huang Wuqing Tao Zhirong Liu Zhifang Chai John K.Gibson Weiqun Shi | 2019 | CCS Chemistry2019，1，3： | 3 |
| 20 | Status of the Advanced Space-based Solar Observatory显示文摘The Advanced Space-based Solar Observatory(ASO-S)was formally approved at the end of 2017.In the past two years,ASO-S underwent its official Phase-B and Phase-C studies.The Phase-B study was successfully accomplished by the end of April 2019,and the Phase-C study is being now undertaken until August 2020.Then the flight model is planned to finish within 16 months.Around the end of 2021,ASO-S will be ready in the launch state.We briefly summarize the history of ASO-S,the phase-B studies,and the phase-C studies. | GAN Weiqun | 2020 | 空间科学学报2020，40，5： | 2 |
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