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29篇 您的检索式:作者名="Li Zihua"
    题名 作者 年代 出处 被引量
1Features of a rare advection-radiation fog event显示文摘To investigate effects of atmospheric pollutants on fog nature, a comprehensive in situ observation project was implemented in the northern suburb of Nanjing, in December of 2006. For December 24-27 there occurred a heavy fog lasting 4 d in succession. This event is of rare characteristics, namely long persistence, high concentration, tall fog top, acid fog water and explosive growth. Detailed analysis along with the causes of the fog was presented. The evidence suggests that the fog was generated by nighttime radiative cooling, maintained and developed under effects of warm, wet advection. As a result, it is an advection-radiation fog event.PU MeiJuan ZHANG GuoZheng YAN WenLian LI ZiHua 2008Science China Earth Sciences2008,51,7:8
2Cascade effects of crop species richness on the diversity of pest insects and their natural enemies显示文摘Understanding how plant species richness influences the diversity of herbivorous and predatory/parasitic arthropods is central to community ecology.We explore the effects of crop species richness on the diversity of pest insects and their natural enemies.Using data from a four-year experiment with five levels of crop species richness,we found that crop species richness significantly affected the pest species richness,but there were no significant effects on richness of the pests’natural enemies.In contrast,the species richness of pest insects significantly affected their natural enemies.These findings suggest a cascade effect where trophic interactions are strong between adjacent trophic levels,while the interactions between connected but nonadjacent trophic levels are weakened by the intermediate trophic level.High crop species richness resulted in a more stable arthropod community compared with communities in monoculture crops.Our results highlight the complicated cross-trophic interactions and the crucial role of crop diversity in the food webs of agro-ecosystems.SHI PeiJian HUI Cang MEN XingYuan ZHAO ZiHua OUYANG Fang GE Feng JIN XianShi CAO HaiFeng LI B.Larry 2014Science China(Life Sciences)2014,57,7:6
3Study on the performance of TEG with heat transfer enhancement using graphene-water nanofluid for a TEG cooling system显示文摘Improvement of the heat transfer effect of cold side of a thermoelectric generator(TEG) is one of the approaches to enhance the performance of the TEG systems.As a new type of heat transfer media,nanofluids can enhance the heat transfer performance of working liquid significantly.In this study,the performance of a commercial TEG with graphene-water(GW) nanofluid as coolants in a minichannel heat exchanger is investigated experimentally at low temperatures.The results show that the output power of TEG increases with the flow rate under 950 mL/min.However,the fluid flow rate has no influence on the output power of TEG with higher flow rate(larger than 950 mL/min) when the heat transfer dynamic balance state of the system is reached.The optimal concentration and flow rate of nanofluid are 0.1 wt%and 950 mL/min,respectively.At the optimal conditions,the improved voltage,output power and conversion efficiency with GW nanofluid applied in the cooling system are increased by11.29%,21.55%and 3.5%in comparison with those with only water applied,respectively.LI YiHuai WU ZiHua XIE HuaQing XING JiaoJiao MAO JianHui WANG Yuan Yuan LI Zhen 2017Science China(Technological Sciences)2017,60,8:5
4Identifying EGFR-Expressed Cells and Detecting EGFR Multi-Mutations at Single-Cell Level by Microfluidic Chip显示文摘EGFR mutations companion diagnostics have been proved to be crucial for the efficacy of tyrosine kinase inhibitor targeted cancer therapies. To uncover multiple mutations occurred in minority of EGFR-mutated cells,which may be covered by the noises from majority of unmutated cells, is currently becoming an urgent clinical requirement. Here we present the validation of a microfluidic-chip-based method for detecting EGFR multimutations at single-cell level. By trapping and immunofluorescently imaging single cells in specifically designed silicon microwells, the EGFR-expressed cellswere easily identified. By in situ lysing single cells, the cell lysates of EGFR-expressed cells were retrieved without cross-contamination. Benefited from excluding the noise from cells without EGFR expression, the simple and cost-effective Sanger's sequencing, but not the expensive deep sequencing of the whole cell population, was used to discover multi-mutations. We verified the new method with precisely discovering three most important EGFR drugrelated mutations from a sample in which EGFR-mutated cells only account for a small percentage of whole cell population. The microfluidic chip is capable of discovering not only the existence of specific EGFR multi-mutations,but also other valuable single-cell-level information: on which specific cells the mutations occurred, or whether different mutations coexist on the same cells. This microfluidic chip constitutes a promising method to promote simple and cost-effective Sanger's sequencing to be a routine test before performing targeted cancer therapy.Ren Li Mingxing Zhou Jine Li Zihua Wang Weikai Zhang Chunyan Yue Yan Ma Hailin Peng Zewen Wei Zhiyuan Hu 2018Nano-Micro Letters2018,10,1:2
5Study on the interfacial shear behavior of steel reinforced concrete (SRC) members with stud connectors after fire显示文摘在在周围的温度下面的火和二 SRCSC 被执行以后,静态地, 20 钢的推外面测试在形状钢的表面上与饰钉接头增强了具体的短柱(SRCSC ) ,以便学习失败模式,装载滑倒关系并且界面砍在火以后的 SRC 成员的转移。试验性的结果证明典型失败模式和在火以后的 SRCSC 的装载滑倒曲线几乎与在周围的温度下面的盒子一样。界面砍 SRCSC 的转移不仅随标本经历了的山峰温度的增加而且随山峰温度持续时间的增加指数地衰退。界面砍与在钢网安排的饰钉一起的标本的转移比那些高得多,饰钉安排在钢凸缘。SRCSC 的实验公式界面砍在火以后的转移被建议,并且计算结果通常与试验性的结果同意很好。Zihua ZHANG Junhua LI Lei ZHANG Kai YU 2014Frontiers of Structural and Civil Engineering2014,8,2:2
6Study on the physical process of winter valley fog in Xishuangbanna Region显示文摘Li Zihua Huang Jianping Huang Yusheng 1999Acta Meteor Sinica1999,13,4:1
7Synthesis of PBA/PMSAN core-shell graft copolymer and its application as a processing aid for PVC显示文摘Gao Jungang Li Zhiting Yao Zihua 1995Polymer1995,36,6:1
8The relationship between p27<sup>kip1</sup> expression and the change of radiosensitivity of esophageal carcinoma cells显示文摘Qiang Tong Weiguo Zhang Shu Jin Shengbao Li Zihua Chen 2011Scandinavian Journal of Gastroenterology2011,,2:1
9MicroRNA?133a inhibits proliferation and invasion, and induces apoptosisin gastric carcinoma cells via targeting fascin actin?bundling protein 1显示文摘Chen Lai Zihua Chen Ruixin Li 2015Molecular Medicine Reports2015,,1:1
10Arterial structural changes in rats immunized by AT1-receptor peptide显示文摘Bin Wang Yu-Hua Liao Zihua Zhou Liudong Li Fen Wei Ming Wang Yumiao Wei 2005Heart and Vessels2005,,4:1
113D model study on fog over complex terrain part Ⅰ:numerical study显示文摘Li Zihua Shi Chune 1997Acta Meteorologica Sinica1997,10,1:1
12Vascular Damages in Rats Immunized by α_1-Adrenoceptor Peptides显示文摘Autoantibodies against the α1-adrenoceptor which had agonist activity as norepinephrine might play roles in the progression of hypertension, but whether the autoantibodies could induce vascular remodeling as norepinephrine is not clear. In this paper, the models with antibodies against the α1-adrenoceptor were made by immunizing Wistar rats with the synthesized the second extracellular loop of α1-adrenoceptor peptides. The homo-age male Wistar rats received BSA in the same immunizing manner and male spontaneous hypertensive rats (SHR) were used as control. All the rats were raised for one year. The blood pressure and morphological changes of arteries were measured. In the end, despite the systolic blood pressure of immunized rats had no difference with normal control, the media thickness of aortas and ratio of media to lumen in the third-order arteries of mesenteric vasculature were increased in immunized rats. The observation with electron microscope showed that the mitochondria of vascular smooth muscle cells (VSMCs) had notable hyperplasia, and the interstitial collagen fibril was increased too. The effects of purified antibodies against α1-adrenoceptor on the proliferation of cultured VSMCs, and the expressions of c-jun, c-fos and α1-adrenoceptor were detected. The results showed that the antibodies could promote the proliferation of cultured VSMCs, and enhance the expression of c-jun both in vitro and in vivo. So we concluded that antibodies against the α1-adrenoceptor could contribute to vascular damages in rats by stimulating the growth of VSMCs which might be caused by the increased c-jun expression, and might play particular roles in the pathological changes of hypertension.Zihua Zhou Yuhua Liao Liudong Li Fen Wei Bin Wang Yumiao Wei Min Wang Xiang Cheng 2008Cellular & Molecular Immunology2008,5,5:1
133D model study on fog over complex terrain part Ⅰ: numerical study 显示文摘Li Zihua Shi Chune 1997Acta Meteor Sinica1997,10,1:1
14The physical structure of the winter fog in Chongqing metropolitan area and its formation process 显示文摘Li zihua Zhang Limin Zhang Qinghong 1994Aeta Meteorologica Sinica1994,8,3:1
15Development of an amperometric biosensor based on glucose oxidase immobilized through silica sol-gel film onto Prussian Blue modified electrode显示文摘LI Tao YAO Zihua DING Ling 2004Sens Actuators:B2004,101,12:1
16Study on papainimmobilization on a macroporous polymer carrier显示文摘DING Liang YAO Zihua LI Tong 2003Turk J Chem2003,27,5:1
173D model study on fog over complex terrain part II : numerical experiment 显示文摘Li Zihua 1997Acta Meteor Sinica1997,11,1:1
18Moment tensor and stress inversion solutions of acoustic emissions during compression and tensile fracturing in crystalline rocks显示文摘We investigate the accuracy and robustness of moment tensor(MT)and stress inversion solutions derived from acoustic emissions(AEs)during the laboratory fracturing of prismatic Barre granite specimens.Pre-cut flaws in the specimens introduce a complex stress field,resulting in a spatial and temporal variation of focal mechanisms.Specifically,we consider two experimental setups:(1)where the rock is loaded in compression to generate primarily shear-type fractures and(2)where the material is loaded in indirect tension to generate predominantly tensile-type fractures.In each test,we first decompose AE moment tensors into double-couple(DC)and non-DC terms and then derive unambiguous normal and slip vectors using k-means clustering and an unstructured damped stress inversion algorithm.We explore temporal and spatial distributions of DC and non-DC events at different loading levels.The majority of the DC and the tensile non-DC events cluster around the pre-cut flaws,where macro-cracks later develop.Results of stress inversion are verified against the stress field from finite element(FE)modeling.A good agreement is found between the experimentally derived and numerically simulated stress orientations.To the best of the authors’knowledge,this work presents the first case where stress inversion methodologies are validated by numerical simulations at laboratory scale and under highly heterogeneous stress distributions.Zihua Niu Bing Qiuyi Li Omid Moradian 2023Journal of Rock Mechanics and Geotechnical Engineering2023,15,10:0
19Organic sensitizers with different thiophene units as conjugated bridges:molecular engineering and photovoltaics显示文摘Three structural modifications with incorporation of alkyl,alkoxy and vinyl bond into the skeleton of thiophene bridge in D-π-A featured organic sensitizers are specifically developed for insight into their influences on photophysical,electrochemical as well as photovoltaic properties in nanocrystalline TiO_2-based dye sensitized solar cells(DSSCs).The insertion of vinyl bond into the conjugation bridge leads to the molecular planar configuration,and the conjugation bridge of 3,4-ethylenedioxythiophene(EDOT)is prone to positively shift its highest occupied molecular orbital(HOMO).The electrochemical impedance spectroscopy(EIS)results indicate that the grafted long alkyl chain onto thiophene is favorable to suppress dye aggregation when adsorbed onto TiO_2film and modification on interface of TiO_2/dye/electrolyte,resulting in a relatively high open-circuit voltage(V_(oc)).Under optimized conditions,dye LS-4 bearing hexylthiophene as the conjugation bridge shows a relatively high overall conversion efficiency of5.45%,with a photocurrent of 11.61 mA cm^(-2),V_(oc)of 744 mV.Wenqin Li Zihua Wu Jinmin Wang Weiwei Zhang Min Wu Weihong Zhu 2017Science China Chemistry2017,60,2:0
20Cross-layer optimization in ultra wideband networks显示文摘Ultra wideband (UWB) network brings both chance and challenge to personal area wireless communications. Compared with other IEEE 802 small range wireless protocols (such as WLAN and Bluetooth), UWB has both extremely high bandwidth (up to 480 Mbps) and low radiation. Moreover, the structured MAC layer of UWB is the fundamental difference to WLAN. The top one is that only when two UWB de-vices belong to the same piconet can they communicate with each other directly, which means that we must jointly consider topology formation and routing when deploying UWB networks because the interaction between routing and topology formation makes separate optimization ineffective. This paper tries to optimize UWB network from a cross-layer point of view. Specifically, given device spatial distribution and traffic requirement, we want to form piconets and determine rout-ing jointly, to maximize the overall throughput. We formulate the problem of joint optimization to mixed-integer programming and give a practical lower bound that is very close to the theoretical upper bound in our simulation. Furthermore, our lower bound is much better than an algorithm that only considers topology formation in UWB networks.WU Qi BI JingPing GUO ZiHua XIONG YongQiang ZHANG Qian LI ZhongCheng 2007Science in China(Series F)2007,50,5:0
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