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| 1 | Enhanced secondary pollution offset reduction of primary emissions during COVID-19 lockdown in China显示文摘To control the spread of the 2019 novel coronavirus(COVID-19),China imposed nationwide restrictions on the movement of its population(lockdown)after the Chinese New Year of 2020,leading to large reductions in economic activities and associated emissions.Despite such large decreases in primary pollution,there were nonetheless several periods of heavy haze pollution in eastern China,raising questions about the well-established relationship between human activities and air quality.Here,using comprehensive measurements and modeling,we show that the haze during the COVID lockdown was driven by enhancements of secondary pollution.In particular,large decreases in NOx emissions from transportation increased ozone and nighttime NO_(3)radical formation,and these increases in atmospheric oxidizing capacity in turn facilitated the formation of secondary particulate matter.Our results,afforded by the tragic natural experiment of the COVID-19 pandemic,indicate that haze mitigation depends upon a coordinated and balanced strategy for controlling multiple pollutants. | Xin Huang Aijun Ding Jian Gao Bo Zheng Derong Zhou Ximeng Qi Rong Tang Jiaping Wang Chuanhua Ren Wei Nie Xuguang Chi Zheng Xu Liangduo Chen Yuanyuan Li Fei Che Nini Pang Haikun Wang Dan Tong Wei Qin Wei Cheng Weijing Liu Qingyan Fu Baoxian Liu Fahe Chai Steven JDavis Qiang Zhang Kebin He | 2021 | National Science Review2021，8，2： | 47 |
| 2 | Matched Filter Based Spectrum Sensing When Primary User Has Multiple Power Levels显示文摘In this paper,we investigate the matched filter based spectrum sensing in a more reasonable cognitive radio(CR) scenario when the primary user(PU) has more than one transmit power levels,as regulated in most standards,i.e.,IEEE 802.11 Series,GSM,LTE,LTE-A,etc.This new multiple primary transmit power(MPTP) scenario is specialized by two different targets:detecting the presence of PU and identifying the power level.Compared to the traditional binary sensing where only the presence of PU is checked,SU may attain more information about the primary network(making CR more 'intelligent') and design the subsequent optimization strategy.The key technology is the multiple hypothesis testing as opposed to the traditional binary hypothesis testing.We discuss two situations under whether the channel phase is known or not,and we derive the closed form solutions for decision regions and several performance metrics,from which some interesting phenomenons are observed and the related discussions are presented.Numerical examples are provided to corroborate the proposed studies. | ZHANG Xinzhi GAO Feifei CHAI Rong JIANG Tao | 2015 | China Communications2015，12，2： | 11 |
| 3 | Consensus on the digestive endoscopic tunnel technique显示文摘With the digestive endoscopic tunnel technique(DETT), many diseases that previously would have been treated by surgery are now endoscopically curable by establishing a submucosal tunnel between the mucosa and muscularis propria(MP). Through the tunnel, endoscopic diagnosis or treatment is performed for lesions in the mucosa, in the MP, and even outside the gastrointestinal(GI) tract.At present, the tunnel technique application range covers the following:(1)Treatment of lesions originating from the mucosal layer, e.g., endoscopic submucosal tunnel dissection for oesophageal large or circular early-stage cancer or precancerosis;(2) treatment of lesions from the MP layer, per-oral endoscopic myotomy, submucosal tunnelling endoscopic resection, etc.; and(3) diagnosis and treatment of lesions outside the GI tract, such as resection of lymph nodes and benign tumour excision in the mediastinum or abdominal cavity. With the increasing number of DETTs performed worldwide, endoscopic tunnel therapeutics, which is based on DETT, has been gradually developed and optimized. However, there is not yet an expert consensus on DETT to regulate its indications, contraindications, surgical procedure, and postoperative treatment.The International DETT Alliance signed up this consensus to standardize the procedures of DETT. In this consensus, we describe the definition, mechanism,and significance of DETT, prevention of infection and concepts of DETTassociated complications, methods to establish a submucosal tunnel, and application of DETT for lesions in the mucosa, in the MP and outside the GI tract(indications and contraindications, procedures, pre-and postoperative treatments, effectiveness, complications and treatments, and a comparison between DETT and other operations). | Ning-Li Chai Hui-Kai Li En-Qiang Linghu Zhao-Shen Li Shu-Tian Zhang Yu Bao Wei-Gang Chen Philip WY Chiu Tong Dang Wei Gong Shu-Tang Han Jian-Yu Hao Shui-Xiang He Bing Hu1 Bing Hu2 Xiao-Jun Huang Yong-Hui Huang Zhen-Dong Jin Mouen A Khashab James Lau Peng Li Rui Li De-Liang Liu Hai-Feng Liu Jun Liu Xiao-Gang Liu Zhi-Guo Liu Ying-Cai Ma Gui-Yong Peng Long Rong Wei-Hong Sha Pateek Sharma Jian-Qiu Sheng Shui-Sheng Shi Dong Wan Seo Si-Yu Sun Gui-Qi Wang Wen Wang Qi Wu Hong Xu Mei-Dong Xu Ai-Ming Yang Fang Yao Hong-Gang Yu Ping-Hong Zhou Bin Zhang Xiao-Feng Zhang Ya-Qi Zhai | 2019 | World Journal of Gastroenterology2019，25，7： | 5 |
| 4 | Utility-based bandwidth allocation algorithm for heterogeneous wireless networks显示文摘In next generation wireless network (NGWN), mobile users are capable of connecting to the core network through various heterogeneous wireless access networks, such as cellular network, wireless metropolitan area network (WMAN), wireless local area network (WLAN), and ad hoc network. NGWN is expected to provide high-bandwidth connectivity with guaranteed quality-of-service to mobile users in a seamless manner; however, this desired function demands seamless coordination of the heterogeneous radio access network (RAN) technologies. In recent years, some researches have been conducted to design radio resource management (RRM) architectures and algorithms for NGWN; however, few studies stress the problem of joint network performance optimization, which is an essential goal for a cooperative service providing scenario. Furthermore, while some authors consider the competition among the service providers, the QoS requirements of users and the resource competition within access networks are not fully considered. In this paper, we present an interworking integrated network architecture, which is responsible for monitoring the status information of different radio access technologies (RATs) and executing the resource allocation algorithm. Within this architecture, the problem of joint bandwidth allocation for heterogeneous integrated networks is formulated based on utility function theory and bankruptcy game theory. The proposed bandwidth allocation scheme comprises two successive stages, i.e., service bandwidth allocation and user bandwidth allocation. At the service bandwidth allocation stage, the optimal amount of bandwidth for different types of services in each network is allocated based on the criterion of joint utility maximization. At the user bandwidth allocation stage, the service bandwidth in each network is optimally allocated among users in the network according to bankruptcy game theory. Numerical results demonstrate the efficiency of the proposed algorithm. | CHAI Rong WANG XiuJuan CHEN QianBin SVENSSON Tommy | 2013 | Science China(Information Sciences)2013，56，2： | 4 |
| 5 | Three new sesquiterpene alkaloids from the root of Tripterygium wilfordii显示文摘三新 sesquiterpene 碱, 1-desacetylwilforgine (1 ) , 1-desacetylwilforine (2 ) ,和 9 鈥 ? hydroxy-2-nicotinoylwilforine (3 ) 从 Tripterygium wilfordii 钩 f. 的根被孤立,与六已知的碱一起。他们的结构被建立根据光谱分析。 | Chun Min Wu Lin Mei Zhou Yi Feng Chai Yu Tian Wu Guo Rong Fan | 2010 | Chinese Chemical Letters2010，21，7： | 4 |
| 6 | Constructions of 11/2-designs from Symplectic Geometry over Finite Fields显示文摘In this paper, we construct some 11/2-designs, which are also known as partial geometric designs, using totally isotropic subspaces of the symplectic space and generalized symplectic graphs.Furthermore, these 11/2-designs yield six infinite families of directed strongly regular graphs. | Zhao CHAI Rong Quan FENG Li Wei ZENG | 2015 | Acta Mathematica Sinica,English Series2015，31，9： | 3 |
| 7 | Effect of the V/Ⅲ ratio during buffer layer growth on the yellow and blue luminescence in undoped GaN epilayer显示文摘Effect of the V/III ratio during buffer layer growth on the yellow and blue luminescence in undoped GaN epilayer has been studied by means of photoluminescence spectroscopy and high resolution X-ray diffraction.It is found that the densities of screw and edge threading dislocations increase with the V/III ratio of the buffer layer,and the intensities of the yellow luminescence(YL) and blue luminescence(BL) emissions also increase dramatically.However,the density ratio of the edge threading dislocation to the screw threading dislocation remains invariant,as well as the intensity ratio of YL emission to BL emission.It can be concluded from these phenomena that the edge threading dislocation and screw threading dislocation can enhance the YL and BL emissions,respectively. | CHAI XuZhao ZHANG Yun LIU Bin XIE ZiLi HAN Ping YE JianDong HU LiQun XIU XiangQian ZHANG Rong ZHENG YouDou | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，9： | 2 |
| 8 | The solar wind plasma upstream of Mars observed by Tianwen-1:Comparison with Mars Express and MAVEN显示文摘On the great journey to Mars,China’s first planetary exploration mission,the Tianwen-1 came within 26 million kilometers of Mars from 31 October 2020 to 25 January 2021 and was getting closer to its destination,the red planet,in search of answers to the cataclysmic climate change that occurred in Martian history.Both the escape of the Martian atmosphere and the loss of surface water were firmly influenced by solar activities.Tianwen-1 provided a unique chance to depict the solar wind streams between Earth and Mars during the minimum of Solar Cycle 25.During the three-month cruise phase of Tianwen-1,the solar wind flows were successively observed at Earth,Tianwen-1,and Mars.After the field of view correction and noise reduction,the solar wind velocity and density measured by Tianwen-1 show good agreement with those at Earth and Mars.The results indicate that the performance of the ion analyzer onboard the Tianwen-1 orbiter is reliable and stable.It is worth looking forward to the joint observations of ion escape with other Mars probes in the following Martian years. | Kai FAN Limei YAN Yong WEI Aibing ZHANG Linggao KONG Markus FRÄNZ Fei HE Lihui CHAI Chongjing YUAN Yuqi WANG Jun ZHONG Zhaojin RONG Zhonghua YAO Yongxin PAN Jun CUI Jiansen HE Wenya LI Binbin TANG Chi WANG | 2022 | Science China Earth Sciences2022，65，4： | 2 |
| 9 | 三维石墨烯-碳纳米管磁性气凝胶的制备及其染料吸附性能显示文摘将ZnCl_(2)、NiCl_(2)·6H_(2)O、FeCl_(2)·4H_(2)O和FeCl_(3)·6H_(2)O分别加入氧化石墨烯和碳纳米管的悬浮液中,在碱性条件下共沉淀和水中与聚乙烯醇交联后,冷冻干燥制备气凝胶。制备的气凝胶由磁性Ni_(0.5)Zn_(0.5)Fe_(2)O_(4)纳米粒子、氧化石墨烯、碳纳米管和聚乙烯醇组成,不仅具有吸附染料分子的活性位点,而且可通过外加磁场从水中分离。在最佳质量比下,制备的气凝胶对亚甲基蓝具有高的吸附容量(q_(e)=71.03 mg g^(-1))和中等磁性强度(M_(S)=3.519 emu g^(-1))。在染料浓度为0.025 mg mL^(-1)的条件下,气凝胶对亚甲基蓝、甲基橙、结晶紫及其相等质量的混合物的去除效率分别为70.1%、4.2%、8.9%和11.1%。该气凝胶重复使用3次后,再生效率仍超过82%。此外,它对生物体无毒,有望用作处理工业废水的吸附剂。 | Zu Rong Ang Ing Kong Rachel Shin Yie Lee Cin Kong Akesh Babu Kakarla Ai Bao Chai Wei Kong | 2022 | 新型炭材料2022，37，2： | 2 |
| 10 | Shortening the sgRNA-DNA interface enables SpCas9 and eSpCas9(1.1)to nick the target DNA strand显示文摘The length of the sgRNA-DNA complementary sequence is a key factor influencing the cleavage activity of Streptococcus pyogenes Cas9(SpCas9)and its variants.The detailed mechanism remains unknown.Here,based on in vitro cleavage assays and base editing analysis,we demonstrate that reducing the length of this complementary region can confer nickase activity on SpCas9 and eSpCas9(1.1).We also show that these nicks are made on the target DNA strand.These properties encouraged us to develop a dual-functional system that simultaneously carries out double-strand DNA cleavage and C-to-T base conversions at separate targets.This system provides a novel tool for achieving trait stacking in plants. | Rong Fan Zhuangzhuang Chai Sinian Xing Kunling Chen Fengti Qiu Tuanyao Chai Jin-Long Qiu Zhengbin Zhang Huawei Zhang Caixia Gao | 2020 | Science China(Life Sciences)2020，63，11： | 2 |
| 11 | Abiotic association of phthalic acid esters with humic acid of a sludge landfill显示文摘在酞酸酸酉旨(PAE ) 和在污泥垃圾堆的腐殖的物质(HS ) 之间的不能生活的协会在 PAE 的命运和稳定性起一个重要作用。平衡分离与结合了 < 啜 class= “ a-plus-plus ” > 14 标记 C 被用来与腐殖的酸学习二丰富的 PAE (diethyl phthalate 和 di-n-butyl phthalate ) 的不能生活的协会(哈) 与不同稳定时间和不同分子的重量从污泥垃圾堆孤立。元素的分析和 Fourier 转变建议的红外线的分光光度计(FTIR ) 那高 K < 潜水艇 class= “ a-plus-plus ” > 价值哈与高芳香的内容和大分子的重量有关哈。结果显示 PAE 与的协会力量哈两个都取决于 PAE 的性质和特征哈。K < 潜水艇 class= “ a-plus-plus ” > 协会的 A 值强烈依赖于解决方案 pH,并且当 pH 从 3.0 ~ 9.0 被增加,戏剧性地减少了。结果建议了那 nonspecific 在 PAE 之间的恐水病的相互作用并且哈是到 PAE 与的协会的主要贡献者哈。在 HA 和 PAE 分子之间的交互氢契约可以也涉及协会。 | Xiaoli CHAI Yongxia HAO Xin ZHAO Guixiang LIU Ying ZHU Rong JI Jun WU Huanhuan TONG Youcai ZHAO | 2012 | Frontiers of Environmental Science & Engineering2012，6，6： | 2 |
| 12 | Amperometric immunosensors based on layer-by-layer assembly of gold nanoparticles and methylene blue on thiourea modified glassy carbon electrode for determination of human chorionic gonadotrophin显示文摘 | CHAI Rong YUAN Ruo CHAI Yaqin | 2008 | Talanta2008，74，5： | 1 |
| 13 | A lattice Boltzmarm model for axisyrnmetric thermal flows through porous media 显示文摘 | RONG F M GUO Z L CHAI Z H | 2010 | International Journal of Heat and Mass Transfer2010，53，23： | 1 |
| 14 | In situ synthesis and unidirectional insertion of membrane proteins in liposome-immobilized silica stationary phase for rapid preparation of microaffinity chromatography显示文摘Cell membrane affinity chromatography has been widely applied in membrane protein(MP)-targeted drug screening and interaction analysis.However,in current methods,the MP sources are derived from cell lines or recombinant protein expression,which are time-consuming for cell culture or purification,and also difficult to ensure the purity and consistent orientation of MPs in the chromatographic stationary phase.In this study,a novel in situ synthesis membrane protein affinity chromatography(iSMAC)method was developed utilizing cell-free protein expression(CFE)and covalent immobilized affinity chromatography,which achieved efficient in situ synthesis and unidirectional insertion of MPs into liposomes in the stationary phase.The advantages of iSMAC are:1)There is no need to culture cells or prepare recombinant proteins;2)Specific and purified MPs with stable and controllable content can be obtained within 2 h;3)MPs maintain the transmembrane structure and a consistent orientation in the chromatographic stationary phase;4)The flexible and personalized construction of cDNAs makes it possible to analyze drug binding sites.iSMAC was successfully applied to screen PDGFRβinhibitors from Salvia miltiorrhiza and Schisandra chinensis.Micro columns prepared by in-situ synthesis maintain satisfactory analysis activity within 72 h.Two new PDGFRβinhibitors,salvianolic acid B and gomisin D,were screened out with KD values of 13.44 and 7.39μmol/L,respectively.In vitro experiments confirmed that the two compounds decreasedα-SMA and collagen Ⅰ mRNA levels raised by TGF-βin HSC-T6 cells through regulating the phosphorylation of p38,AKT and ERK.In vivo,Sal B could also attenuate CCl_(4)-induced liver fibrosis by downregulating PDGFRβdownstream related protein levels.The iSMAC method can be applied to other general MPs,and provides a practical approach for the rapid preparation of MP-immobilized or other biological solid-phase materials. | Yanqiu Gu Rong Wang Panpan Chen Shengnan Li Xinyi Chai Chun Chen Yue Liu Yan Cao Diya Lv Zhanying Hong Zhenyu Zhu Yifeng Chai Yongfang Yuan Xiaofei Chen | 2022 | Acta Pharmaceutica Sinica B2022，12，9： | 1 |
| 15 | Design of trotting controller for the position-controlled quadruped robot显示文摘This work presents a controller designed for position-controlled quadrupedal dynamic locomotion,aiming at simple and robust trotting control. The controller takes the torso attitude angles and velocities into planning foot trajectories. Firstly design of the servo motor actuated quadruped robot is introduced and the kinematic equations are deduced. Then a scheme is presented for controlling the robot torso attitude based on the virtual leg model. Furthermore,it demonstrates the design of the controller which enables the robot to have a wide range of trotting gaits and omni-directional motions. Finally,results of robust trotting in various speeds,path tracking and push recovery in simulation are reported,and results of trotting on real quadruped robots will be studied. | 张国腾 Liu Jinchang Rong Xuewen Li Yibin Chai Hui Li Bin Zhang Hui Zhang Shuaishuai | 2016 | High Technology Letters2016，22，3： | 1 |
| 16 | Energy consumption optimization-based joint route selection and flow allocation algorithm for software-defined networking显示文摘Software-defined networking(SDN) is expected to dramatically simplify network control processes,enable the convenient deployment of sophisticated networking functions, and support user applications with guaranteed quality of service(Qo S). To achieve data packet transmission between two non-adjacent switches in SDN, an efficient route selection algorithm should be designed. In this paper, we consider the data transmission of multiple user flows over SDN. Under the assumption that flow splits at intermediate switches are allowed,we jointly study the route selection and flow allocation problem. To stress the problem of resource competition among various user flows, we apply network virtualization technology and propose a virtual network architecture based on the design of an optimal joint route selection and flow allocation algorithm. Jointly considering the transmission performance of multiple user flows and stressing the importance of energy consumption at transmission links and switches, we formulate the total energy consumption of user flows and design an optimization problem that minimizes the energy consumption, subject to data transmission and service requirement constraints of the flows. Because the formulated optimization problem is an NP-complete problem that cannot be conveniently solved, we transform it into a minimum-cost commodity flow problem and solve the problem by using an N-algorithm. Numerical results demonstrate the effectiveness of the proposed algorithm. | Rong CHAI Haipeng LI Feiying MENG Qianbin CHEN | 2017 | Science China(Information Sciences)2017，60，4： | 1 |
| 17 | Energy efficiency based joint cell selection and power allocation scheme for HetNets显示文摘 | Kwabena Kobia Mensah Rong Chai Denis Bilibashi Feifei Gao | 2016 | Digital Communications and Networks2016，2，4： | 1 |
| 18 | A Lattice Boltzmann Model for axsymmetriy thermal flows through Porous media 显示文摘 | RONG Fumei GUO Zhaoli CHAI Zhenhua | 2010 | International Jounal of Heatand Mass Transfer2010，53，： | 1 |
| 19 | EUV-dependence of Venusian dayside ionopause altitude:VEX and PVO observations显示文摘The Venusian dayside ionosphere, similar to other planetary ionospheres, is produced primarily by ionization of its neutral upper atmosphere due to solar extreme ultraviolet (EUV) radiation. It has become clear that the expansion of the ionosphere may be strongly controlled by the EUV level, as exhibited in data collected by the Pioneer Venus Orbiter (PVO) during one solar cycle (1978 1992). However, the EUV-dependence of the Venusian dayside ionopause altitude, which defines the outer boundary of the ionosphere, remains obscure because the PVO crossed the dayside ionopause only during the solar maximum;its periapsis lifted too high during the solar minimum. Recently, during the period 2006 2014, which included the longest and quietest solar minimum of the past several decades, Venus Express (VEX) provided measurements of the photoelectron boundary (PEB) over the northern high-latitude region. Since the photoelectron boundary is closely related to the ionopause, we have an opportunity to analyze the EUV effect on the dayside ionopause by combining PVO and VEX observations. We have evaluated and then reduced the orbit bias effect in data from both PVO and VEX, and then used the results to derive a relationship between solar EUV level and the dayside ionopause altitude. We find that the dayside ionopause altitude increases as the solar EUV level increases, which is consistent with theoretical expectations. | QianQian Han Markus Fraenz Yong Wei Eduard Dubinin Jun Cui LiHui Chai ZhaoJin Rong WeiXing Wan Yoshifumi Futaana | 2020 | Earth and Planetary Physics2020，4，1： | 1 |
| 20 | The parameter analysis and algorithm research of vertical handoff in heterogeneous net- work显示文摘 | Chai Rong Xiao Min Tang Lun | 2010 | Journal of Chongqing University of Posts and Tele- communications: Natural Science Edition2010，22，1： | 1 |
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