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106篇 您的检索式:作者名="Ziqiang Li"
    题名 作者 年代 出处 被引量
1Coordinated regulation of apical hook development by gibberellins and ethylene in etiolated Arabidopsis seedlings显示文摘当在土壤发芽时,当通过土壤耸出时,黑暗成年的 Arabidopsis 幼苗开发一个顶端的钩,它保护子叶和顶端的 meristematic 纸巾。几荷尔蒙被报导清楚地调制这个过程。以前的研究证明了乙烯和赤霉素(气体) 并列地调整钩发展,尽管内在的分子的机制大部分是未知的。当 paclobutrazol 镇压了时,这里,我们显示出提高的那 GA 3 ethylene-overexpression 和 EIN3-overexpression (EIN3ox ) 导致了钩弯曲,并且 della 异种展出了夸大的钩弯曲,它要求了发信号的未经触动的乙烯小径。基因学习表明那提高 GA 的钩开发依赖于无钩 1 (HLS1 ) ,调停的一个中央管理者多重发信号小径的输入在顶端的钩开发期间。我们进一步发现那 GA 3 导致(并且 DELLA 蛋白质镇压了) 在乙烯感觉迟钝的 3/EIN3-LIKE 的 HLS1 表示 1 (EIN3/EIL1 ) 依赖举止, EIN3/EIL1 由此激活 HLS1 抄写由对它的倡导者直接有约束力。另外, DELLA 蛋白质被发现与 EIN3/EIL1 的 DNA 有约束力的领域交往并且镇压 EIN3/EIL1-regulated HLS1 表示。有 naphthylphthalamic 酸的处理,一个极的植物生长素运输禁止者,镇压 EIN3ox 线的组成地夸大的钩弯曲和 della 异种,支持那植物生长素在钩开发乙烯和 GA 小径下游地工作。一起拿,我们的结果作为联系 DELLA 的抄写因素的一个新类识别 EIN3/EIL1 并且证明 GA 由经由 EIN3/EIL1 函数的 derepression 导致 HLS1 的表达式部分与乙烯在合作支持顶端的钩形成。Fengying An Xing Zhang Ziqiang Zhu Yusi Ji Wenrong He Zhiqiang Jiang Mingzhe Li Hongwei Guo 2012Cell Research2012,22,5:34
2An Association of Elevated Serum Prolactin with Phthalate Exposure in Adult Men显示文摘Objective To investigate the associations of hormone circulation with phthalate exposure in adult men. Methods Semen and serum samples were collected from 118 men who were suspected of infertility. Phthalate diesters including dibutyl phthalate (DBP) and diethylhexyl phthalate (DEHP) in both semen and serum samples were measured, along with serum levels of follicle stimulating hormone (FSH), luteinizing hormone (LH), testosterone (T), estradiol (E 2 ) and prolactin (PRL). Results Serum PRL was positively associated with serum DBP and DEHP and semen DEHP in all models of Spearman correlation, linear regression and binary logistic regression. In linear regression models adjusted for potential confounders and excluding subjects with undetectable phthalates, a 10‐fold increase in semen DEHP was associated with a 23% increase in serum PRL, as well as a 26% increase in serum DBP and a 20% increase in serum DEHP. In logistic regression models all subjects demonstrated a dose‐response relationship between above reference value PRL and semen DEHP (odds ratio per tertile adjusted for potential confounders = 1.0, 1.70, 3.50; P for trend = 0.01), and serum DBP (1.0, 1.10, 2.62; P for trend = 0.04), and serum DEHP (1.0, 1.46, 4.69; P for trend < 0.01). A positive correlation between serum estradiol and semen DEHP (linear regression), and an inverse correlation between semen DBP and serum testosterone and T:E 2 ratio (Spearman correlation) were also established. Conclusions Serum PRL is suggested to be positively associated with both DBP and DEHP exposure in adult men.LI ShuGuang DAI JiCan ZHANG LiQian ZHANG Jing ZHANG ZiQiang CHEN Bo 2011Biomedical and Environmental Sciences2011,24,1:12
3Structure Design of Lower Limb Exoskeletons for Gait Training显示文摘Due to the close physical interaction between human and machine in process of gait training, lower limb exoskeletons should be safe, comfortable and able to smoothly transfer desired driving force/moments to the patients. Correlatively, in kinematics the exoskeletons are required to be compatible with human lower limbs and thereby to avoid the uncontrollable interactional loads at the human-machine interfaces. Such requirement makes the structure design of exoskeletons very difficult because the human-machine closed chains are complicated. In addition, both the axis misalignments and the kinematic character difference between the exoskeleton and human joints should be taken into account. By analyzing the DOF(degree of freedom) of the whole human-machine closed chain, the human-machine kinematic incompatibility of lower limb exoskeletons is studied. An effective method for the structure design of lower limb exoskeletons, which are kinematically compatible with human lower limb, is proposed. Applying this method, the structure synthesis of the lower limb exoskeletons containing only one-DOF revolute and prismatic joints is investigated; the feasible basic structures of exoskeletons are developed and classified into three different categories. With the consideration of quasi-anthropopathic feature, structural simplicity and wearable comfort of lower limb exoskeletons, a joint replacement and structure comparison based approach to select the ideal structures of lower limb exoskeletons is proposed, by which three optimal exoskeleton structures are obtained. This paper indicates that the human-machine closed chain formed by the exoskeleton and human lower limb should be an even-constrained kinematic system in order to avoid the uncontrollable human-machine interactional loads. The presented method for the structure design of lower limb exoskeletons is universal and simple, and hence can be applied to other kinds of wearable exoskeletons.LI Jianfeng ZHANG Ziqiang TAO Chunjing JI Run 2015Chinese Journal of Mechanical Engineering2015,28,5:11
4A Passive Anti-icing Strategy Based on a Superhydrophobic Mesh with Extremely Low Ice Adhesion Strength显示文摘Although superhydrophobic materials have attracted much research interest in anti-icing,some controversy still exists.In this research,we report a cost-effective method used to verify the contribution of area fraction to ice adhesion strength.We tried to partially-embed siliea nanopnarticles into microscale fabrics of a commercial polyamide mesh.Then,the area fraction could be determined by altering the mesh size.Generally,the ice adhesion strength decreases as the area fraction decreases.An ice adhesion strength of~1.9 kPa and a delayed freezing time of~1048 s can be obtained.We attribute the low ice adhesion strength to the combination of superhydro-phobicity and stress concentration.The superhydrophobicity prohibits the water from penetrating into the voids of the meshes,and the small actual contact area leads to stress concentration which promotes interfacial crack propagation.Moreover,our superhydrophobic mesh simultaneously exhibis a micro-nano hierarchical structure and a partally-cmbedded structure.Therefore,the as-prepared superhydrophobic mesh retained the ieephobicity after 20 icingldeicing cycles,and maintained its superhydrophobicity even afier 60 sandpaper-abrasion cycles and a 220'C thermal treatment.Peng Wang Ziqiang Li Qing Xie wei Duan Xinchun Zhang Huilong Han 2021Journal of Bionic Engineering2021,18,1:9
5Effect of treatment course of comprehensive intervention with Traditional Chinese Medicine on mortality of acquired immunodeficiency syndrome patients treated with combined antiretroviral therapy显示文摘OBJECTIVE:To investigate the effect of a treatment course of comprehensive intervention with Traditional Chinese Medicine(TCM) on the mortality of patients with acquired immunodeficiency syndrome(AIDS) treated with combined antiretroviral therapy(c ART).METHODS:AIDS patients who had taken c ART in a national TCM human immunodeficiency virus treatment trial program(NTCMTP) before 2009 were enrolled in this study and followed for 36 months from November 2009.Patients enrolled in the NTCMTP in 2004 were taken as the first group,those enrolled in 2006 as the second group,and those enrolled in 2009 as the third group.Cumulative survival rates were calculated by the life table method.Survival curves for subgroups were compared by the log-rank test.Hazard ratios were calculated with a Cox proportional hazards model.RESULTS:A total of 1443 AIDS patients were followed for 3 years(4198 person-years).During this period,91(6.3%) patients died and 13(0.9%) were lost to follow-up.The total mortality rate was 2.17/100 person-years.The mortality rate of patients enrolled in the NTCMTP in 2004 was 1.49/100 person-years,which was lower than that of patients enrolled in 2006(2.23/100 person-years) and 2009(3.48/100 person-years).After adjusting for other factors,a shorter time of treatment with TCM,male sex,older age,lower CD4 + T-cell counts,and long-term treatment with c ART were risk factors of mortality.CONCLUSION:Long-term treatment with TCM decreased the mortality risk of AIDS patients.Factors such as being male,older age,CD4+ T-cell counts,and time of treatment with TCM and c ART were correlated with mortality.Guo Huijun Wang Jian Li Zhengwei Jiang Ziqiang Xu Qianlei Xu Liran 2016Journal of Traditional Chinese Medicine2016,36,4:9
6Design and application of a small electrode experimental installation for resistivity measurement of mineral and solid insulating material显示文摘There has not been an effective method to measure the resistivity of small-size sample of mineral and solid insulating material until now.According to the Chinese National Standard(GB/T1410-2006) and features of digital high resistance meter,a small electrode experimental installation was developed;it can work with current high resistance meter;the sample decreases to 18 mm from standard size 100 mm in diameter and reduces by 30.86 times in area.A three-electrode system is supported and precisely positioned by two insulating bases whose diameter is 60 mm and height is 20 mm,which ensures accuracy of device structure and reliability of measuring results.The key technological parameters are as follows:diameter of high voltage electrode is 18mm;diameter of measuring electrode is 14.6 mm;internal diameter and external diameter of guard electrode are 16 and 18 mm,respectively;the gap between guard electrode and measuring electrode is set at 0.6 mm.These parameters are adequate for the measurement of flat specimen of mineral and solid insulating material whose diameter is 18 mm.According to the confirmatory experiment on the volume resistivity and surface resistivity,the measuring results are almost the same,using a small electrode experimental installation and a standard electrode.WANG Ling LUO Ke LI ZiQiang GUAN SongYun GE Wei ZHANG JunYuan 2011Science China(Technological Sciences)2011,54,4:8
7Presenilin 2 deficiency facilitates Aβ-induced neuroinflammation and injury by upregulating P2X7 expression显示文摘Accumulating evidence suggests that β-amyloid (Aβ)-induced neuroinflammation plays a prominent and early role in Alzheimer’s disease (AD). In this study, we demonstrated that Presenilin 2 (PS2) deficiency facilitates Aβ-induced neuroinflammation and injury by upregulating P2X7 expression both in vitro and in vivo. PS2 knockout mice demonstrated increased cognitive impairments and cerebral injury. PS2 deficiency increased the expression of P2X7 both in neurons and microglial cells.Furthermore, extracellular ATP also increased in both Aβ-treated and untreated PS2 knockout microglial cells. Notably, Aβ-induced classical proinflammatory cytokines such as IL-1β, IL-1α and TNF-α were increased in PS2 knockout microglial cells, suggesting a potential role for PS2 in the regulation of neuroinflammation. The expression of P2X7 clearly increased in PS2 knockdown BV2 cells. Consistent with in vivo data, Aβ-induced IL-1β production was also clearly enhanced in PS2 knockdown BV2 cells. Additionally, expression of the transcription factor Sp1 was increased in PS2 knockdown cells. When we treated PS2 knockdown cells with the specific Sp1 inhibitor MIT, we observed that enhanced P2X7 expression was significantly rescued. Taken together, these data suggests that PS2 plays a protective role during Aβ-induced neuroinflammation and injury through down-regulation of P2X7 expression.Juliang Qin Xiaoyu Zhang Ziqiang Wang Jinju Li Zhen Zhang Liangcai Gao Hua Ren Min Qian Bing Du 2017Science China(Life Sciences)2017,60,2:7
8Reduning injection for fever, rash, and ulcers in children with mild hand, foot, and mouth disease: a randomized controlled clinical study显示文摘OBJECTIVE: To assess the efficacy and safety of Reduning injection for fever, rash, and ulcers in children with mild hand, foot, and mouth disease(HFMD). METHODS: A stratified-block randomized, double-blind, parallel-controlled, and multicenter clinical trial was conducted with 360 patients in five hospitals across China: Quanzhou Children's Hospital, Shijiazhuang No. 5 Hospital, Shanghai Public Health Centre, Hunan Provincial Children's Hospital, and Kaifeng Children's Hospital. Patients were randomized into three groups with 120 in each. Group A was treated with Western Medicine, group B with Reduning injection, a Chinese herbal medicine, and group C with both Reduning injection and Western Medicine. Results were compared for treatment efficacy and safety on HFMD. The clinical outcomes were observed as follows: fever and onset time of antifebrile effect(time to bring the body temperature down ≥0.5℃ after medication); cumulative time for fever recovery(body temperature recovering to normal and lasting more than 24 h without medication); cumulative time for rash disappearance(without new rashes or ulcers appearing and the original ones fading away); and cumulative time for mouth ulcer disappearance. RESULTS: For the onset time of the antifebrile effect, there was no statistical difference between groups A and B(P>0.05) and groups B and C(P> 0.05). However, there was a statistical difference between groups A and C(P<0.05), and the effect in group C was the best. For the cumulative time for rash disappearance, there was no statistical difference between groups A and B(P>0.05). There were statistical differences between groups A and C, and groups B and C(P<0.05), and the effect in group C was the best. For the cumulative time for mouth ulcers disappearance, there were no statistical differences among the three groups(P>0.05). CONCLUSION: Reduning injection with Western Medicine for symptomatic treatment is most effective for mild HFMD. No adverse reactions were observed.Guoliang Zhang Jie Zhao Liyun He Shiyan Yan Ziqiang Zhuo Haojie Zheng Yongping Mu Shuangjie Li Xi Zhang Jihan Huang Xiuhui Li Jianping Liu Hehe Wan Chaoyu Wei Wei Xiao 2013Journal of Traditional Chinese Medicine2013,33,6:7
9A new free-hand pedicle screw placement technique with reference to the supraspinal ligament显示文摘We sought to compare the safety and accuracy of a new free-hand pedicle screw placement technique to that of the conventional technique.One hundred fifty-three consecutive adult patients with simple fracture in the thoracic or/and lumbar spine were alternately assigned to either the new free-hand or the conventional group.In the new free-hand technique group,preoperative computerized tomography(CT) images were used to calculate the targeted medial-lateral angle of each pedicle trajectory and the pedicle screw was inserted perpendicular to the corresponding supraspinal ligament.In the conventional technique group,the medial-lateral and cranial-caudal angle of each pedicle trajectory was determined by intraoperatively under fluoroscopic guidance.The accuracy rate of pedicle screw placement,the time of intraoperative fluoroscopy,the operating time and the amount of blood loss during operation were respectively compared.All screws were analyzed by using intraoperative radiographs,intraoperative triggered electromyography(EMG) monitoring data,postoperative CT data and clinical outcomes.The accuracy rate of pedicle screw placement in the new free-hand technique group and the conventional technique group was 96.3% and 94.2%(P < 0.05),respectively.The intraoperative fluoroscopy time of the new technique group was less than that of the conventional technique group(5.37 seconds vs.8.79 seconds,P < 0.05).However,there was no statistical difference in the operating time and the amount of blood loss during operation(P > 0.05).Pedicle screw placement with the free-hand technique which keeps the screw perpendicular to the supraspinal ligament is an accurate,reliable and safe technique to treat simple fracture in the thoracic or lumbar spine.Juming Li Hong Zhao Hao Xie Lipeng Yu Jifu Wei Min Zong Feng Chen Ziqiang Zhu Ning Zhang Xiaojian Cao 2014The Journal of Biomedical Research2014,28,1:7
10Reliability and validity of dermatology life quality index: assessment of quality of life in human immunodeficiency virus/acquired immunodeficiency syndrome patients with pruritic papular eruption显示文摘OBJECTIVE: To test the reliability and validity of dermatology life quality index(DLQI) in simplified Chinese language by assessing the quality of life(QoL) in HIV(human immunodeficiency virus)/AIDS(Acquired immunodeficiency syndrome) patients with pruritic papular eruption(PPE). METHODS: A study of simplified-Chinese-versiond from10 questions with the principal component analysis and the contribution rate of the 3 common factors was 59.95%. CONCLUSION: The simplified-Chinese-version DIQL is an acceptable and valid scale for HIV/AIDS patients with PPE. It can be used to evaluate the QoL of HIV/AIDS patients with PPE in China.Zhibin Liu Zheng Xie Li Zhang Yantao Jin Huijun Guo Ziqiang Jiang Xiumin Chen Jun Yuan 2013Journal of Traditional Chinese Medicine2013,33,5:5
11Growth and Optical Applications of Centimeter-Long ZnO Nanocombs显示文摘Ultralong ZnO nanocombs have been synthesized on silicon substrates with a high growth rate of~7μm/s using a simple“thermal evaporation and condensation”method promoted by Cu catalysts.The lengths of the ZnO nanocombs range from several millimeters to more than one centimeter and the diameters of the branches are about 300 nm.The growth mechanism of the ultralong nanocombs and the catalytic behavior of the copper are discussed.The nanocombs were readily separated and their applications as optical polarizer and grating were investigated.The results show that the ultralong ZnO nanocombs can act as effective optical components in miniaturized integrated optics systems.Ke Yu Qiuxiang Zhang Jin Wu Lijun Li Yuʼe Xu Shaohua Huang Ziqiang Zhu 2008Nano Research2008,1,3:4
12Research progress in electrospinning engineering for all-solid-state electrolytes of lithium metal batteries显示文摘Owing to safety issue and low energy density of liquid lithium-ion batteries(LIBs),all-solid-state lithium metal batteries(ASLMBs)with unique all-solid-state electrolytes(SEs)have attracted wide attentions.This arises mainly from the advantages of the SEs in the suppression of lithium dendrite growth,long cycle life,and broad working temperature range,showing huge potential applications in electronic devices,electric vehicles,smart grids,and biomedical devices.However,SEs suffer from low lithiumion conductivity and low mechanical integrity,slowing down the development of practical ASLMBs.Nanostructure engineering is of great efficiency in tuning the structure and composition of the SEs with improved lithium-ion conductivity and mechanical integrity.Among various available technologies for nanostructure engineering,electrospinning is a promising technique because of its simple operation,cost-effectiveness,and efficient integration with different components.In this review,we will first give a simple description of the electrospinning process.Then,the use of electrospinning technique in the synthesis of various SEs is summarized,for example,organic nanofibrous matrix,organic/inorganic nanofibrous matrix,and inorganic nanofibrous matrix combined with other components.The current development of the advanced architectures of SEs through electrospinning technology is also presented to provide references and ideas for designing high-performance ASLMBs.Finally,an outlook and further challenges in the preparation of advanced SEs for ASLMBs through electrospinning engineering are given.Manxi Wang Yaling Wu Min Qiu Xuan Li Chuanping Li Ruiling Li Jiabo He Ganggang Lin Qingrong Qian Zhenhai Wen Xiaoyan Li Ziqiang Wang Qi Chen Qinghua Chen Jinhyuk Lee Yiu-Wing Mai Yuming Chen 2021Journal of Energy Chemistry2021,30,10:4
13Laboratory-based Surveillance and Clinical Profile of Sporadic HEV Infection in Shanghai,China显示文摘The study aimed to describe the epidemiological,virological and clinical features of sporadic HEV infection in eastern China.A total of 6112 patient sera were tested for anti-HEV IgG or anti-HEV IgM during one consecutive year(between August 2018 and July 2019).HEV RNA presence was evaluated by RT-PCR and HEV sequences were phylogenetically analyzed.Clinical features of confirmed HEV-infected patients were delineated.The sero-positivity rate of anti-HEV IgG maintained stable around 40%,while an obvious winter spike of anti-HEV IgM prevalence was observed.A total of 111 patients were confirmed of HEV viremia by molecular diagnosis.Subtype 4d was predominant.Phylogenetic analyses suggest that certain strains circulate across species and around the country.Subjects with confirmed current HEV infection had a high median age(58 years)and males were predominant(62.2%).Most patients presented with jaundice(75.7%)and anorexia(68.0%).Significantly elevated levels of liver enzymes and bilirubin were observed.Remarkably,the baseline bilirubin level was positively correlated with illness severity.Pre-existing HBV carriage may deteriorate illness.The clinical burden caused by locally acquired HEV infection is increasing.Surveillance should be enforced especially during the transition period from winter to spring.Patients with higher level of bilirubin at disease onset had slower recovery from HEV infection.Jie Lu Qing Li Jiayuan Jiang Ziqiang Li Peiyun Wang Zike Sheng Rongtao Lai Huijuan Zhou Wei Cai Hui Wang Qing Guo Honglian Gui Qing Xie 2021Virologica Sinica2021,36,4:4
14Great progress in developing 500 MHz single cell superconducting cavity in China显示文摘Superconducting cavities have been adopted in many kinds of accelerator facilities such as synchrotron radiation light source, hard X-ray free electron laser linac, colliders and energy recovery linacs (ERL). The 500 MHz superconducting cavities will be a candidate to be installed in the high current accelerators and high current ERLs for their large beam aperture, low higher order modes impedance and high current threshold value. This paper presents great progress in the whole sequence of developing 500 MHz superconducting cavity in China. It describes the first in-house successful development of 500 MHz single cell superconducting cavity including the deep-drawing of niobium half cells, electron beam wielding of cavity, surface preparations and vertical testing. The highest accelerating gradient of the fabricated cavity #SCD-02 higher than 10 MV/m was obtained while the quality factor was better than 4×108 at 4.2 K, which has reached the world level of the same kind of cavities.LIU JianFei HOU HongTao MAO DongQing FENG ZiQiang MA ZhenYu LUO Chen ZHAO ShenJie ZHAO YuBin YU HaiBo YIN Bo ZHANG ZhiGang ZHENG Xiang LI Zheng 2011Science China(Physics,Mechanics & Astronomy)2011,54,S2:4
15Mobility in China,2020:a tale of four phases显示文摘2020 was an unprecedented year;with rapid and drastic changes in human mobility due to the COVID-19 pandemic.To understand the variation in commuting patterns among the Chinese population across stable and unstable periods,we used nationwide mobility data from 318 million mobile phone users in China to examine the extreme fluctuations of population movements in 2020,ranging from the Lunar New Year travel season(chunyun),to the exceptional calm of COVID-19 lockdown,and then to the recovery period.We observed that cross-city movements;which increased substantially in chunyun and then dropped sharply during the lockdown,are primarily dependent on travel distance and the socio-economic development of cities.Following the Lunar New Year holiday,national mobility remained low until mid-February,and COVID-19 interventions delayed more than 72.89 million people returning to large cities.Mobility network analysis revealed clusters of highly connected cities,conforming to the social-economic division of urban agglomerations in China.While the mass migration back to large cities was delayed,smaller cities connected more densely to form new clusters.During the recovery period after travel restrictions were lifted,the netflows of over 55%city pairs reversed in direction compared to before the lockdown.These findings offer the most comprehensive picture of Chinese mobility at fine resolution across various scenarios in China and are of critical importance for decision making regarding future public-health-emergency response,transportation planning and regional economic development,among others.Suoyi Tan Shengjie Lai Fan Fang Ziqiang Cao Bin Sai Bing Song Bitao Dai Shuhui Guo Chuchu Liu Mengsi Cai Tong Wang Mengning Wang Jiaxu Li Saran Chen Shuo Qin Jessica R.Floyd Zhidong Cao Jing Tan Xin Sun Tao Zhou Wei Zhang Andrew J.Tatem Petter Holme Xiaohong Chen Xin Lu 2021National Science Review2021,8,11:3
16Drought tolerance evaluation of tobacco plants transformed with different set of genes under laboratory and field conditions显示文摘尽管广泛的研究证明了许多干旱应答的基因授与干旱忍耐到植物,能力在各种各样的自然条件下面由不同基因授与的干旱忍耐的比较很少有报导。我们评估了并且比较 transgenes,干旱应答的基因(AtDREB1B 和 AtCBL1 ) 和根的二个集合的效果调整建筑学的基因(iaaM 和 AtCKX ) ,在在 Nicotiana tabacum 的干旱忍耐上,植物使遭到了到不同条件。根特定的倡导者 PYK10 驾驶的 AtCKX3 的表示(此后指定了为 P10;P10 : AtCKX3 ) , 35S:AtCKX3,或 P10:iaaM 支持了根生长和开发。比作怀有 P10 的植物: 展出的 AtCKX3, 35S:AtCKX3, P10:iaaM,或空向量,那些带的 35S:AtDREB1B, 35S:AtCBL1,或 35S:iaaM 在控制实验室的条件下面增加了干旱忍耐。相反地,在地里,条件,与 35S:AtDREB1 转变的植物, 35S:AtCBL1,或 35S:iaaM 对干旱应力敏感。在地条件下面,干旱应力戏剧性地减少了生长和而它在带 P10 的植物上有小效果,怀有 35S:AtDREB1B, 35S:AtCBL1, 35S:iaaM,或空向量的植物的种子生产: AtCKX3, 35S:AtCKX3,或 P10:iaaM。这研究证明到有环境条件的干旱压力变化的植物忍耐,和我们的结果显示操作控制根建筑学的基因的表示可能为处于自然条件与改进干旱忍耐设计植物是重要的。Yuanhua Wang Ruihong Dang Jinxi Li Yu Han Ning Ding Xingliang Li Meiru Jia Ziqiang Li Lingzhi Wei Jinzhu Jiang Yijuan Fan Bingbing Li Wensuo Jia 2015Science Bulletin2015,60,6:3
17End-to-end Congestion Control for TCP-friendly Flows with Variable Data Rates显示文摘JIANG Ming YANG Qiang WU Chunming LI Ziqiang MIAO Yuting 2012Chinese Journal of Electronics2012,21,3:2
18Property analysis of bistatic forward-looking SAR with arbitrary geometry显示文摘Bistatic forward-looking synthetic aperture radar(SAR) has many advantages and applications owing to its twodimensional imaging capability.There could be various imaging configurations because of the geometric flexibility of bistatic platforms,resulting in kinds of models built independently among which there could be some similar even the same motion features.Comprehensive research on such systems in a more comprehensive and general point of view is required to address their difference and consistency.Property analysis of bistatic forwardlooking SAR with arbitrary geometry is achieved including stripmap and spotlight modes on airborne platform,missile-borne platform,and hybrid platform of both.Emphasis is placed on azimuth space variance of some key parameters significantly affecting the subsequent imaging processing,based on which the frequency spectra are further described and compared considering respective features of different platforms for frequency imaging algorithm developing.Simulation results confirm the effectiveness and correctness of our analysis.Ziqiang Meng Yachao Li Mengdao Xing Zheng Bao 2016Journal of Systems Engineering and Electronics2016,27,1:2
19A Markov decision problem in a risk model with interest rate and Markovian environment显示文摘We consider the compound binomial model in a Markovian environment presented by Cossette et al.(2004). We modify the model via assuming that the company receives interest on the surplus and a positive real-valued premium per unit time, and introducing a control strategy of periodic dividend payments. A Markov decision problem arises and the control objective is to maximize the cumulative expected discounted dividends paid to the shareholders until ruin minus a discounted penalty for ruin. We show that under the absence of a ceiling of dividend rates the optimal strategy is a conditional band strategy given the current state of the environment process. Under the presence of a ceiling for dividend rates, the character of the optimal control strategy is given. In addition, we offer an algorithm for the optimal strategy and the optimal value function.Numerical results are provided to illustrate the algorithm and the impact of the penalty.TAN JiYang YANG XiangQun LI ZiQiang CHENG YangJin 2016Science China Mathematics2016,59,1:2
20Experimental Study on Impingement and Film Overall Cooling Characteristics of Turbine Shroud显示文摘Based on the variable characteristics of the actual operating conditions of the turbine shroud and the purpose of improving the cooling effect of the turbine shroud,this paper builds a test system of the impingement-film cooling shroud with two gas inlet angles(90°,167°).The effects of film cooling hole arrangement,gas inlet angle,blowing ratio(0.7,1.0,1.5,2.0,2.5,3.0)and temperature ratio(1.2,1.3,1.4,1.5,1.6)on the cooling characteristics of the impingement-film cooling shroud were experimentally studied by infrared temperature measurement technology,especially the effects of gas inlet angle and temperature ratio.The results showed that the film covering effect of the film cooling hole vertical or the same direction of the high-temperature gas incoming flow is better than the film covering effect of the reverse direction with the incoming flow,and the optimal arrangement of film cooling holes can improve the cooling effectiveness of the shroud.Compared with 90°intake gas,the film coverage area on the shroud surface of the 167°intake gas is expanded,and the surface average overall cooling effectiveness is increased by 1.03%to 12.6%.The overall cooling effectiveness of turbine shroud increases with the increase of blowing ratio,which increases the flow rate and pressure of cooling gas,and the corresponding increase rate is between 1.04%and 9.96%.However,the increase in the temperature ratio increases the mainstream heating capacity,resulting in a decrease in the cooling effectiveness of the shroud,with a maximum reduction rate of 11.04%.LI Ziqiang WANG Longfei MAO Junkui BI Shuai WANG Feilong 2022Journal of Thermal Science2022,31,1:1
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