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| 1 | 喷雾助剂类型及浓度对喷头雾化效果影响显示文摘为达到农药减施增效的目的,助剂逐渐成为农药喷洒过程中必不可少的部分,其效果及浓度直接影响着施药过程中农药利用率。为探索不同助剂及浓度对喷头雾化效果的影响,该文利用激光粒度仪比较分析了IDK120-025型和LU120-015型喷头喷施不同浓度典型增效剂意欧、减量增产助剂激健、尿素时,其雾滴体积中径及雾滴分布相对跨度差异。两款喷头应用广泛,喷雾角度相同、喷腔雾化结构相异。结果表明:3种助剂溶液对IDK120-025型喷头的影响效果相比于LU120-015型喷头更为显著,但是LU120-015喷头喷雾雾滴均匀性较优于IDK120-025。激健溶液配比为1:3 000时,在0.4 MPa喷雾压力条件下,与水相比可将IDK喷头雾滴体积中径增加20.43%,粒径分布相对跨度减小1.74%;意欧溶液配比为1:2 000时,在0.4MPa喷雾压力条件下,与水相比可将IDK喷头雾滴体积中径增加11.10%,粒径分布相对跨度减小8.86%;意欧溶液配比1:3 000时,在0.2 MPa喷雾压力条件下,与水相比可将LU喷头雾滴体积中径减小5.99%,粒径分布相对跨度增大1.56%;尿素溶液在配比1:2 000时,在0.4 MPa喷雾压力条件下,与水相比可将IDK喷头雾滴体积中径增加16.92%,粒径分布相对跨度减小6.92%。该试验可为田间农药施用中助剂及喷头的选择提供依据,为进一步研究喷头及助剂提供数据基础。 | 张瑞瑞 张真 徐刚 陈立平 Andrew J Hewitt | 2018 | 农业工程学报2018，34，20： | 25 |
| 2 | 脉宽调制变量控制喷头雾化性能及风洞环境雾滴沉积特性显示文摘脉宽调制(pulse width modulation, PWM)技术是实现变量喷雾的重要手段,其工作参数与环境条件决定着施药的精准性。为探究PWM变量喷头雾化及风洞环境沉积特性,该文研制了脉宽调制变量喷雾系统,以农业施药常用空心圆锥雾化喷头喷雾的雾化、沉积特性为研究对象,在IEA-II型常规风速风洞内,通过点阵式放置电容式雾滴沉积传感器测定计算雾滴沉积与沉积评价指数(deposition evaluation index,DEIX),并利用Spraytec雾滴粒径仪测试其雾滴体积中径(volume median diameter,VMD)和雾滴相对分布跨度(relative span,RS)。试验结果表明:占空比在10%~40%间,随占空比增大,雾滴体积中径呈减小趋势,与占空比10%时相比,占空比40%时的雾滴体积中径下降了7.9%;PWM占空比60%时分布跨度最小,较占空比20%时雾滴分布跨度下降9.52%,雾滴谱最窄,获得的雾滴粒径分布最集中。雾滴沉积方面,风速1 m/s条件下,雾滴主要沉积在距喷头3.3 m内,此范围内沉积量占总沉积量的95.7%,当风速超过3 m/s时,在气流作用下,雾滴沉降距离增大,导致雾滴运动偏离施药靶标区域。PWM占空比增加,雾滴沉积评价指数DEIX值降低,雾滴的飘移率增大;相同工况下,风速及喷头高度越大,DEIX越小,施药雾滴越易飘移。该研究可为农业田间实际生产中脉宽调制变量施药技术应用及其工况参数的选择提供依据,为PWM变量调节装置的进一步优化提供研究基础。 | 张瑞瑞 李龙龙 付旺 陈立平 伊铜川 唐青 Andrew J Hewitt | 2019 | 农业工程学报2019，35，3： | 17 |
| 3 | 2009年喀喇昆仑山叶尔羌河冰川阻塞湖及冰川跃动监测显示文摘在气候变化的影响下,喀喇昆仑山叶尔羌河冰川突发洪水近几年频繁发生。2009-05—09,利用中国环境减灾卫星(HJ-1A/1B)影像,对叶尔羌河上游冰川突发洪水的源头进行了动态监测。在克亚吉尔冰川末端发现了冰川阻塞湖,并监测到其不断扩大。2009-08初该处冰川湖突然消失,同期影像显示其消失后,河谷中残留大量冰体,与往年情况差异巨大。结合相关水文记录及历史资料分析认为,极有可能是冰川末端突然前进(跃动)使冰川坝遭到破坏,导致冰川阻塞湖泄水。由此推测克亚吉尔冰川发生了罕见跃动现象,但需要进一步研究验证。 | 牛竞飞 刘景时 王迪 Kenneth Hewitt | 2011 | 山地学报2011，29，3： | 13 |
| 4 | 国际生物样本库和网络系统:成功因素和主要预算方案显示文摘概述了分布在欧洲、北美、澳大利亚以及亚洲的16个最大的生物样本库与生物样本信息网络在人类生物样本收集、分发,以及资金的科学运转等方面所采用的方法。这些生物样本库的运转和经济模式取决于他们所在国家和研究所的医学和研究宗旨。生物样本库模式的成功运作取决于各种因素,包括明确的目标,可靠的经营计划,以及具有严格质量控制和操作规范的生物样本收集。 | Jim Vaught Andrea Kelly Robert Hewitt 孙孟红 倪淑娟 杜祥 | 2011 | 医学与哲学(A)2011，32，7： | 8 |
| 5 | Optimization of variables for maximizing efficacy and efficiency in aerial spray application to cotton using unmanned aerial systems显示文摘Aerial spraying can support efficient defoliation without crop contact.With the recent introduction to unmanned aerial system(UAS)for aerial spraying in China,there is a need to determine the optimum application variables to achieve high efficacy and efficiency with low costs.The present research involved field studies across two annual cotton production seasons in North Xinjiang,China.Four factors,including volume rate(A),tank mix including spray adjuvants(B),flight altitude(C),flight speed(D)and three levels of L9(3^(4))orthogonal arrays were carried out to optimize the application parameters for three types of UASs.These included different numbers of rotors as follows:four-rotors,six-rotors and eight-rotors.Spray coverage,distribution uniformity(coefficient of variation(CV)of droplet coverage),rates of cotton defoliation and boll opening,application efficiency and cost were measured and assessed.Results showed that:(1)the rates of defoliation and boll opening by aerial cotton defoliant application could meet the requirement of cotton mechanized harvesting;(2)the optimal scenario for the three UASs was A_(3)B_(2)C_(1)D_(3),Volume rate(A3):48 L/hm^(2);Tank mix and concentration(B_(2)):(Tuotulong 225+Sujie 750+Ethephon 2250)mL/hm^(2),Flight altitude(C_(1)):1.5 m,and Flight speeds(D_(3))for unmanned helicopters with four-rotors,six-rotors and eight-rotors were 3.12 m/s,2.51 m/s and 3.76 m/s,respectively.These results can provide guidance for cotton defoliant aerial spraying in China using UAS. | Juan Liao Ying Zang Xiwen Luo Zhiyan Zhou Yubin Lan Yu Zang Xiuyan Gu Weiming Xu Andrew John Hewitt | 2019 | International Journal of Agricultural and Biological Engineering2019，12，2： | 6 |
| 6 | EUS-guided FNA for diagnosis of solid pancreatic neoplasms: a meta-analysis显示文摘 | Michael Jonathan Hewitt Mark J.W. McPhail Lucia Possamai Ameet Dhar Panagiotis Vlavianos Kevin J. Monahan | 2012 | Gastrointestinal Endoscopy2012，，2： | 5 |
| 7 | Seasonal Forecasts of the Summer 2016 Yangtze River Basin Rainfall显示文摘The Yangtze River has been subject to heavy flooding throughout history,and in recent times severe floods such as those in 1998 have resulted in heavy loss of life and livelihoods.Dams along the river help to manage flood waters,and are important sources of electricity for the region.Being able to forecast high-impact events at long lead times therefore has enormous potential benefit.Recent improvements in seasonal forecasting mean that dynamical climate models can start to be used directly for operational services.The teleconnection from El Ni ?no to Yangtze River basin rainfall meant that the strong El Ni ?no in winter 2015/16 provided a valuable opportunity to test the application of a dynamical forecast system.This paper therefore presents a case study of a real-time seasonal forecast for the Yangtze River basin,building on previous work demonstrating the retrospective skill of such a forecast.A simple forecasting methodology is presented,in which the forecast probabilities are derived from the historical relationship between hindcast and observations.Its performance for2016 is discussed.The heavy rainfall in the May–June–July period was correctly forecast well in advance.August saw anomalously low rainfall,and the forecasts for the June–July–August period correctly showed closer to average levels.The forecasts contributed to the confidence of decision-makers across the Yangtze River basin.Trials of climate services such as this help to promote appropriate use of seasonal forecasts,and highlight areas for future improvements. | Philip E. BETT Adam A. SCAIFE Chaofan LI Chris HEWITT Nicola GOLDING Peiqun ZHANG Nick DUNSTONE Doug M. SMITH Hazel E. THORNTON Riyu LU Hong-Li REN | 2018 | Advances in Atmospheric Sciences2018，35，8： | 3 |
| 8 | The effect of trade between China and the UK on national and global carbon dioxide emissions显示文摘 | You Li C.N. Hewitt | 2008 | Energy Policy2008，，6： | 3 |
| 9 | Waste biomass from production process co-firing with coal in a steam boiler to reduce fossil fuel consumption:A case study显示文摘Waste biomass is always generated during the production process in industries.The ordinary way to get rid of the waste biomass is to send them to landfill or burn it in the open field.The waste may potentially be used for co-firing with coal to save fossil fuel consumption and also reduce net carbon emissions.In this case study,the bio-waste from a Nicotiana Tabacum(NT) pre-treatment plant is used as the biomass to co-fire with coal.The samples of NT wastes were analysed.It was found that the wastes were of the relatively high energy content which were suitable for co-firing with coal.To investigate the potential and benefits for adding NT wastes to a Fluidised Bed Combustion(FBC) boiler in the plant,detailed modelling and simulation are carried out using the European Coal Liquefaction Process Simulation and Evaluation (ECLIPSE) process simulation package.The feedstock blending ratios of NT waste to coal studied in this work are varied from 0%to 30%. The results show that the addition of NT wastes may decrease the emissions of CO2 and SOx without reducing the boiler performance. | Hongyan Gu Kai Zhang Yaodong Wang Ye Huang Neil Hewitt Anthony P Roskilly | 2013 | Journal of Energy Chemistry2013，22，3： | 3 |
| 10 | 胶带和胶管的粘合体系显示文摘沉淀法白炭黑在轮胎胎体和镀黄铜钢丝带束层中能提高粘合性能已完全得到确认。本工作研究了白炭黑和各种添加剂在输送带、传动带和胶管等非轮胎用途粘合部件中的应用情况。进行了包括NBR与黄铜 ,CR、CIIR、EPDM或NBR与织物或帘线的静态和动态粘合研究。在这些实例中 ,主要通过使用高用量白炭黑以及间苯二酚树脂、酚醛树脂、氧化锌和氧化镁来改善粘合。 | Hewitt N L 曾泽新 | 2001 | 橡胶工业2001，48，9： | 3 |
| 11 | Transgenic and genome-edited fruits: background, constraints, benefits, and commercial opportunities显示文摘Breeding has been used successfully for many years in the fruit industry,giving rise to most of today’s commercial fruit cultivars.More recently,new molecular breeding techniques have addressed some of the constraints of conventional breeding.However,the development and commercial introduction of such novel fruits has been slow and limited with only five genetically engineered fruits currently produced as commercial varieties—virus-resistant papaya and squash were commercialized 25 years ago,whereas insect-resistant eggplant,non-browning apple,and pink-fleshed pineapple have been approved for commercialization within the last 6 years and production continues to increase every year.Advances in molecular genetics,particularly the new wave of genome editing technologies,provide opportunities to develop new fruit cultivars more rapidly.Our review,emphasizes the socioeconomic impact of current commercial fruit cultivars developed by genetic engineering and the potential impact of genome editing on the development of improved cultivars at an accelerated rate. | Maria Lobato-Gomez Seanna Hewitt Teresa Capell Paul Christou Amit Dhingra Patricia Sarai Giron-Calva | 2021 | Horticulture Research2021，8，1： | 2 |
| 12 | Acetylsalicylic acid supplementation improves protein utilization efficiency while vitamin E supplementation reduces markers of the inflammatory response in weaned pigs challenged with enterotoxigenic E.coli显示文摘Background: This experiment was conducted to test the hypothesis that vitamin E(Vit E) and acetylsalicylic acid(ASA), a cyclooxygenase-2(COX-2) inhibitor, will additively reduce the production of the immunosuppressive molecule prostaglandin E_2(PGE_2) and hence reduce inflammatory responses in weaner pigs experimentally infected with an enterotoxigenic strain of E. coli.Methods: The experiment was conducted in a research facility with 192 individually-housed male weaner pigs(Landrace × Large White) weighing 6.6 ± 0.04 kg(mean ± SEM). The pigs were experimentally infected with an enterotoxigenic strain of E. coli and were allocated to a 2 × 3 factorial design with the respective factors being without and with 125 ppm ASA and three levels of Vit E supplementation(50, 100 or 200 IU/kg diet, dl-α-tocopheryl acetate).Results: Acetylsalicylic acid supplementation improved average daily gain(P < 0.05) and tended to improve feed:gain ratio(P < 0.10) during the first 14 d after weaning. Acetylsalicylic acid supplementation also improved(P < 0.001) amino acid utilization efficiency(as assessed by plasma urea level) and tended to decrease(P < 0.10) PGE_2 production in the liver without affecting smal intestinal histology and tight junction protein mR NA expression in the jejunal epithelium. Vitamin E supplementation greater than 100 IU/kg diet sustained both the plasma Vit E concentration(P < 0.001) and plasma haptoglobin content(P < 0.001) after weaning. However, there was no additive effects of the combined supplementation of ASA and Vit E on performance, intestinal barrier function and inflammatory responses of weaned pigs.Conclusions: Although ASA and vitamin E improved amino acid utilization efficiency and reduced acute inflammatory responses, ASA and vitamin E did not additively reduce production of PGE_2 and inflammatory responses in weaner pigs experimental y infected with an enterotoxigenic strain of E. coli. | Jae Cheol Kim Bruce P. Mullan John L. Black Robert J. E. Hewitt Robert J. van Barneveld John R. Pluske | 2017 | Journal of Animal Science and Biotechnology2017，8，1： | 2 |
| 13 | 21世纪人力资源新趋势显示文摘 | Hewitt Associates | 2000 | 江苏纺织2000，，07： | 2 |
| 14 | Comparison of analytical methods for determination of volatile organic compounds 显示文摘 | Hewitt A D Miyares P H Leggett D C Jenkins T F | 1992 | Envir Sci Technol1992，26，： | 1 |
| 15 | 'Twin Copper Source' growth of metal-organic framework membrane- Cu3(BTC)2 with high permeability and selectivity for recyeling H2 显示文摘 | Guo H L Zhu G Hewitt I J Qiu S | 2009 | Journal of American Chemical Society2009，131，20： | 1 |
| 16 | Design,construction,and use of tissue microarrays 显示文摘 | Hewitt S M | 2004 | Methods Mol Bio2004，264，： | 1 |
| 17 | Occupational health in metal arc welding显示文摘 | P Hewitt | 1999 | Welding in the World1999，43，5： | 1 |
| 18 | A prosp-ective study of the incidence of delayed hemolytic transfusion reactions following peri-operative blood transfusion显示文摘 | Hewitt PE Macintyre EA Devnish A | 1988 | Br J Haematology1988，69，4： | 1 |
| 19 | A simple pulmonary rehabilitation program improves health outcomes and reduces hospital utilization in patients with COPD显示文摘 | Hui KP Hewitt AB | 2003 | Chest2003，124，1： | 1 |
| 20 | Effect of retroviral endostatin gene transfer on subcutaneous and intraperitoneal growth of murine tumors显示文摘 | Feldman AL Alexander HR Hewitt SM | 2001 | J Natl Cancer Inst2001，93，13： | 1 |
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