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| 1 | Forecast scheme and strategy for extended-range predictable components显示文摘Although extended-range forecasting has exceeded the limit of daily predictability of weather,there are still partially predictable characteristics of meteorological fields in such forecasts.A targeted forecast scheme and strategy for extended-range predictable components is proposed.Based on chaotic characteristics of the atmosphere,predictable components and unpredictable random components are separated by using the standpoint of error growth in a numerical model.The predictable components are defined as those with slow error growth at a given range,which are not sensitive to small errors in initial conditions. A numerical model for predictable components(NMPC)is established,by filtering random components with poor predictability.The aim is to maintain predictable components and avoid the influence of rapidly growing forecast errors on small scales. Meanwhile,the analogue-dynamical approach(ADA)is used to correct forecast errors of predictable components,to decrease model error and statistically take into account the influence of random components.The scheme is applied to operational dynamical extended-range forecast(DERF)model of the National Climate Center of China Meteorological Administration (NCC/CMA).Prediction results show that the scheme can improve forecast skill of predictable components to some extent, especially in high predictability regions.Forecast skill at zonal wave zero is improved more than for ultra-long waves and synoptic-scale waves.Results show good agreement with predictability of spatial scale.As a result,the scheme can reduce forecast errors and improve forecast skill,which favors operational use. | ZHENG ZhiHai HUANG JianPing FENG GuoLin CHOU JiFan | 2013 | Science China Earth Sciences2013，56，5： | 9 |
| 2 | Analysis of stable components for extended-range (10-30 days) weather forecast:A case study of continuous overcast-rainy process in early 2009 over the mid-lower reaches of the Yangtze River显示文摘A continuous overcast-rainy weather(CORW) process occurred over the mid-lower reaches of the Yangtze River(MLRYR) in China from February 14 to March 9 in 2009,with a large stretch and long duration that was rarely seen in historical records.Using the empirical orthogonal function(EOF),we analyzed the geopotential height anomaly field of the NCEP-DOE Reanalysis II in the same period,and defined the stable components of extended-range(10-30 days) weather forecast(ERWF).Furthermore,we defined anomalous and climatic stable components based on the variation characteristics of the variance contribution ratio of EOF components.The climatic stable components were able to explain the impact of climatically averaged information on the ERWF,and the anomalous stable components revealed the abnormal characteristics of the continuous overcast-rainy days.Our results show that the stable components,especially the anomalous stable components,can maintain the stability for a longer time(more than 10 days) and manifest as monthly scale low-frequency variation and ultra-long-wave activities.They also behave as ultra-long waves of planetary scale with a stable and vertically coherent structure,reflect the variation of general circulation in mid-high latitudes,display the cycle of the zonal circulation and the movement and adjustment of the ultra-long waves,and are closely linked to the surface CORW process. | FENG GuoLin SUN ShuPeng ZHAO JunHu ZHENG ZhiHai | 2013 | Science China Earth Sciences2013，56，9： | 8 |
| 3 | Dynamic-statistics combined forecast scheme based on the abrupt decadal change component of summer precipitation in East Asia显示文摘基于 19832011 CMAP 数据,在东亚的降水异例和它的附近的海区域(此后叫的东亚为短) 在 1999 前表明 ++ 模式并且 + 模式以后;这个十的变化在相应 EOF3 部件主要被包含。然而, NCC_CGCM 预报结果是相当不同的,它在 1999 前揭示 ++ 模式并且 ++ 模式以后。同时,基于这些关键 SST 区域改进 NCC_CGCMs 预报精确性的概率被讨论,并且动态统计的联合预报计划为增加在东亚在夏天降水包含的十的变化的信息被构造。独立样品预报结果显示这个预报计划罐头有效地修改十的变化信息在东亚在夏天降水包含了的 NCC_CGCMs (特别在 30 敢琠敨攠癮 的区域吗?? | GONG ZhiQiang ZHAO JunHu FENG GuoLin CHOU JiFan | 2015 | Science China Earth Sciences2015，58，3： | 7 |
| 4 | Reconstruction of Conceptual Prediction Model for the Three Rainfall Patterns in the summer of eastern China under global warming显示文摘With the influence of global warming,the global climate has undergone significant inter-decadal variation since the late 1970s.Although El Nio-Southern Oscillation(ENSO)has been the strongest signal for predicting global climate inter-annual variability,its relation with the summer rainfall in China has significantly changed,and its indicative function on the summer rainfall in China has weakened.This has led to a significant decrease in the accuracy rate of early conceptual prediction models for the Three Rainfall Patterns in the summer of eastern China.On the basis of the difference analysis of atmospheric circulation system configuration in summer,as well as the interaction of ocean and atmospheric in previous winter between two phases,i.e.before and after the significant global warming(1951 to 1978 and 1979 to 2012,respectively),we concluded that(1)Under different inter-decadal backgrounds,the atmospheric circulations that impacted the Three Rainfall Patterns in the summer of eastern China showed consistency,but in the latter phase of the global warming,the Western Pacific Subtropical High(WPSH)was on the strong side,the position of which was in the south,and the blocking high in the Eurasia mid-high latitudes was active,while the polar vortex extended to the south,and meridional circulation intensified.This circulation background may have been conducive to the increase of the circulation frequency of Patterns II and III,and the decrease of the circulation frequency of Pattern I,thus leading to more Patterns II and III and fewer Pattern I in the summer rainfall of eastern China.(2)In the former phase,the corresponding previous winter SST fields of different rainfall patterns showed visible differences.The impact of ENSO on North Pacific Oscillation(NPO)was great,and the identification ability of which on Patterns I and II of summer rainfall was effective.In the latter phase,this identification ability decreased,while the impact of ENSO on the Pacific/North American(PNA)teleconnection pattern increased,and the identification ability of the PNA on Patterns II and III also increased.Based on the new inter-decadal climate background,this study reconstructs the conceptual prediction model for the Three Rainfall Patterns in summer of eastern China by using the previous winter PNA and the Eurasian(EU)teleconnection indexes.The fitting effect was satisfying,though it is necessary to be further tested. | ZHAO JunHu FENG GuoLin | 2014 | Science China Earth Sciences2014，57，12： | 7 |
| 5 | Activity of cold vortex in northeastern China and its connection with the characteristics of precipitation and circulation during 1960-2012显示文摘Based on the daily reanalysis data released by NCEP/NCAR and the daily precipitation of 753 Chinese stations from May to August during the period of 1960 to 2012, the statistical characteristics of the cold vortex in northeastern China were analyzed. In addition, the strength index, which described the characteristics of the vortex consistently and frequently, and the geographical distribution were given by continuous anomalies of circulation. Based on this index, the activity routines of the cold vortex, characteristics of atmospheric circulation, and their effects on precipitation in northeastern China were analyzed. The results show that: the activities of the cold vortex exhibit remarkable features of annual and interdecadal oscillation, and the vortex high frequency and its characteristics of atmospheric circulation are described more accurately by the strength index of the cold vortex, which shows a high correspondence with the vortex precipitation during early summer and midsummer in the northeast. In strong(weak) vortex years, the general circulation in the middle and high latitudes of Eurasia is to the advantage(disadvantage) of the formation, development and maintenance of the cold vortex, thus it is easy(difficult) to form the circulation which is beneficial to transmit vapor from south to north during the period of July to August. Blocking over the Ural Mountains prevails(does not prevail) in early summer, and blocking over the Sea of Okhotsk prevails(does not prevail) in midsummer. Areas where the subtropical high is too small(large) and moves toward the north too late(early) are better(worse) for the maintenance of the cold vortex in northeastern China. | LIU Gang FENG Guolin QIN Yulin CAO Ling YAO Hongwei LIU Ziqi | 2015 | Journal of Geographical Sciences2015，25，12： | 5 |
| 6 | Analysis on Autofrettage of Cylinders显示文摘Autofrettage is an effective technique to improve load-bearing capacity and safety for pressure vessels.For autofrettaged cylinder,the depth of plastic zone,or overstrain is a key factor which affects load-bearing capacity and safety.The previous research on overstrain was not done in terms of the point of view of raising load-bearing capacity as far as possible and simultaneously avoiding compressive yield for cylinders experiencing autofrettage handling,and there were no analytic solutions of autofrettage in the above view point presented,the 3rd and 4th strength theories were not applied synthetically in the research to compare the results from these two theories.In this paper,with the aid of the analytic method,based on summing up the authors' previous research,results from autofrettage of a cylinder based on the 3rd and 4th strength theories are studied and compared,and the laws contained in the results are looked into.Then,the essential cause and reason for the obtained laws are analyzed and the inherent and meaning relations between various parameters in autofrettage theory are revealed.It is shown that the maximum radius ratio for equivalent residual stress at inside surface never exceeds the yield strength even for a cylinder experiencing wholly yielded autofrettage,or the critical radius ratio is kc=2.218 457 489 916 7…,irrespective of the 3rd or 4th strength theories.The equation relating the depth of plastic zone with the thickness of a cylinder is identical for the 3rd and 4th strength theories.In form,the optimum load-bearing capacity of an autofrettaged cylinder is two times the initial yield pressure of the unautofrettaged cylinder irrespective of the 3rd or 4th strength theory.The revealed inherent relations between various parameters and varying laws of the parameters as well as the forms of the relations under the 3rd and 4th strength theories not only have theoretical meanings but also have prospects in engineering application. | ZHU Ruilin ZHU Guolin TANG Feng | 2012 | Chinese Journal of Mechanical Engineering2012，25，3： | 2 |
| 7 | Spatial-temporal variation characteristics of global evaporation revealed by eight reanalyses显示文摘On the basis of eight atmospheric reanalyses, we analyzed the spatial-temporal characteristics of global evaporation and also briefly evaluated the eight reanalyses. The results indicate that the long-term mean annual evaporation obtained from different reanalyses are consistent over most regions, with significant maritime-continental contrasts, as well as differences in meridional directions, and the land evaporation generally decreases with the increase of altitude. In addition, the temporal evolution of global evaporation varies significantly among the datasets, MERRA, ERA-Interim, NCEP-NCRA, and NCEP-DOE are very similar, whereas CFSR agrees best with ERA-40. Comparison of the inter-annual to inter-decadal variability of land evaporation reveals large differences among the reanalyses, whereas MERRA, CFSR, and NCEP-DOE are exactly similar. The temporal variation of evaporation over the oceans showed a relatively high consistency, which indicates that the quality of the reconstructed evaporation values over the oceans is higher, and even greater uncertainties lie in the estimates of evaporation over the land. In general, MERRA and NCEP-DOE may appropriately reflect the spatial-temporal characteristics of global evaporation, showing strong representativeness. The CFSR and ERA-40 are capable of revealing the characteristics of land evaporation, whereas ERA-Interim, NCEP-NCAR, OAFlux, and HOAPS are relatively applicable for research focused on the evaporation over the oceans. According to ERA-40, NCEP-NCAR, and OAFlux, global evaporation significantly decreased for the period of 1958–1978. In contrast, most of the eight reanalyses show a significant linear increase for the period of 1979–2011, and evaporation over the oceans was even more pronounced. Furthermore, the results are presented for the mean annual cycle of global evaporation, the changes at the low latitudes in the Northern Hemisphere are most distinct, and the monthly variation amplitude of the land evaporation was higher than that of the evaporation over the oceans. | SU Tao FENG GuoLin | 2015 | Science China Earth Sciences2015，58，2： | 2 |
| 8 | On the Relationship between the Winter Eurasian Teleconnection Pattern and the Following Summer Precipitation over China显示文摘The Eurasian teleconnection pattern(EU) is an important low-frequency pattern with well-known impacts on climate anomalies in Eurasia. The difference of low-level v-winds in several regions in the Eurasian mid–high latitudes is defined as the EU index(EUIV). In this study, the relationship between the winter EUIVand precipitation in the following summer over China is investigated. Results show that there is a significant positive(negative) correlation between the winter EUIVand the following summer precipitation over North China(the Yangtze River–Huaihe River basins). Meanwhile, an interdecadal variability exists in the interannual relationship, and the correlation has become significantly enhanced since the early 1980 s.Thus, the proposed EUIVmay have implications for the prediction of summer precipitation anomalies over China. In positive winter EUIVyears, three cyclonic circulation anomalies are observed—over the Ural Mountains, the Okhotsk Sea, and the subtropical western North Pacific. That is, the Ural blocking and Okhotsk blocking are inactive, zonal circulation prevails in the mid–high latitudes, and the western Pacific subtropical high tends to be weaker and locates to the north of its normal position in the following summer. This leads to above-normal moisture penetrating into the northern part of East China, and significant positive(negative) precipitation anomalies over North China(the Yangtze River–Huaihe River basins), and vice versa. Further examination shows that the SST anomalies over the Northwest Pacific and subtropical central North Pacific may both contribute to the formation of EUIV-related circulation anomalies over the western North Pacific. | Junhu ZHAO Liu YANG Bohui GU Jie YANG Guolin FENG | 2016 | Advances in Atmospheric Sciences2016，33，6： | 2 |
| 9 | Prediction of precipitation during summer monsoon with self-memorial model 显示文摘 | Feng Guolin Cao Hongxing Gao Xinquan | 2001 | Advances in Atmospheric Scineces2001，18，5： | 1 |
| 10 | Extracting predictable components and forecasting techniques in extended-range numerical weather prediction显示文摘This paper refers to the CNOP-related algorithms and formulates the practical method and forecast techniques of extracting predictable components in a numerical model for predictable components on extended-range scales.Model variables are divided into predictable components and unpredictable chaotic components from the angle of model prediction error growth.The predictable components are defined as those with a slow error growth at a given range.A targeted numerical model for predictable components is established based on the operational dynamical extended-range forecast(DERF)model of the National Climate Center.At the same time,useful information in historical data are combined to find the fields for predictable components in the numerical model that are similar to those for the predictable components in historical data,reducing the variable dimensions in a similar judgment process and further correcting prediction errors of predictable components.Historical data is used to obtain the expected value and variance of the chaotic components through the ensemble forecast method.The numerical experiment results show that this method can effectively improve the forecast skill of the atmospheric circulation field in the 10–30 days extended-range numerical model and has good prospects for operational applications. | WANG QiGuang CHOU JiFan FENG GuoLin | 2014 | Science China Earth Sciences2014，57，7： | 1 |
| 11 | Water Vapor Transport Related to the Interdecadal Shift of Summer Precipitation over Northern East Asia in the Late 1990s显示文摘In this study, an interdecadal shift of summer precipitation over northern East Asia(NEA) was identified, demonstrating that summer precipitation decreased abruptly after 1998/99. The synchronous shift in summer moisture budget and water vapor transport over NEA was further investigated by using the NCEP/NCAR reanalysis data. The results indicate that water vapor transported northward into NEA from three low-latitude paths was limited because most water vapor was transported eastward. Water vapor transported from the westerly path in mid–high(WMH) latitudes exhibited significant correlations with summer precipitation in NEA and experienced a significant adjustment in the late 1990s. Regarding the spatial distributions of water vapor transport, less input was found through the western boundary while more output occurred through the eastern boundary of NEA, and zonal water vapor transport fluxes mainly concentrated at the low to middle levels, which led to the summer precipitation shift in NEA around the late 1990s. Furthermore, it is also confirmed that the wind anomalies(rather than the moisture disturbance) as the dominant internal dynamic factor and Pacific Decadal Oscillation/Atlantic Multidecadal Oscillation(PDO/AMO) as possible external force played important roles in influencing the water vapor transport and causing the summer precipitation shift over NEA in the late 1990s. | Po HU Minghao WANG Liu YANG Xiaojuan WANG Guolin FENG | 2018 | Journal of Meteorological Research2018，32，5： | 1 |
| 12 | The methodology of quantitative assess economic output of climate change显示文摘A method is introduced in this paper to study the effect of future climatic change on the economy.The researchers determine the economic output of climate change from historical data,and provide a method to quantitatively predict economic output of climate change by an economic-climatic model.A historical reciprocating examination is used to analyze output data for various crops in eight agricultural areas in China and meteorological data from 160 observatories in China from 1980 to 2000.The results show that the methods used are reasonable to a certain extent and good in application. | CHOU JieMing DONG WenJie FENG GuoLin | 2011 | Chinese Science Bulletin2011，56，13： | 1 |
| 13 | Design Optimization of Flow Control Device for Multi-strand Tundish 显示文摘 | Bao Yanping Xu Bomei Liu Guolin Yue Feng Qi Xinxia | 2003 | Journal of University of Science and Technoloy2003，10，2： | 1 |
| 14 | Derivation of Oridonin with Bioreduction-Responsive Disulfide Bond显示文摘A novel oridonin derivative substituted with 3-((2,3-dihydroxypropyl)dithio)-propionyl group at 14-O position was synthesized through a two-step procedure:Esterification of oridonin with 3-(2-pyridyldithio)propanoic acid and the subsequent thiol-disulfide exchange reaction with 3-mercapto-1,2-propanediol.The bioreduction-responsive di-sulfide bond in the compound leads to high leaving ability of the 14-O acyl moiety when treated with glutathione as monitored by reverse phase high-performance liquid chromatography. | Ming Du Qisang Guo Hua Feng Guolin Lu Xiaoyu Huang | 2014 | Chinese Journal of Chemistry2014，32，5： | 0 |
| 15 | Application of named reactions in polymer synthesis显示文摘In recent years, with the rapid development of polymer science, the application of classical named reactions has transferred from small-molecule compounds to polymers. The versatility of named reactions in terms of monomer selection, solvent environment, reaction temperature, and post-modification permits the synthesis of sophisticated macromolecular structures under conditions where other reaction processes will not operate. In this review, we divided the named reactions employed in polymer-chain synthesis into three types: transition metal-catalyzed cross-coupling reactions, metal-free cross-coupling reactions, and multi-components reactions. Thus, we focused our discussion on the progress in the utilization of these named reactions in polymer synthesis. | Xue Jiang Chun Feng Guolin Lu Xiaoyu Huang | 2015 | Science China Chemistry2015，58，11： | 0 |
| 16 | Atmospheric Circulation Patterns over East Asia and Their Connection with Summer Precipitation and Surface Air Temperature in Eastern China during 1961–2013显示文摘Based on the NCEP/NCAR reanalysis data and Chinese observational data during 1961–2013, atmospheric circulation patterns over East Asia in summer and their connection with precipitation and surface air temperature in eastern China as well as associated external forcing are investigated. Three patterns of the atmospheric circulation are identified, all with quasi-barotropic structures:(1) the East Asia/Pacific(EAP) pattern,(2) the Baikal Lake/Okhotsk Sea(BLOS) pattern, and(3) the eastern China/northern Okhotsk Sea(ECNOS) pattern. The positive EAP pattern significantly increases precipitation over the Yangtze River valley and favors cooling north of the Yangtze River and warming south of the Yangtze River in summer. The warm sea surface temperature anomalies over the tropical Indian Ocean suppress convection over the northwestern subtropical Pacific through the Ekman divergence induced by a Kelvin wave and excite the EAP pattern. The positive BLOS pattern is associated with below-average precipitation south of the Yangtze River and robust cooling over northeastern China. This pattern is triggered by anomalous spring sea ice concentration in the northern Barents Sea. The anomalous sea ice concentration contributes to a Rossby wave activity flux originating from the Greenland Sea, which propagates eastward to North Pacific. The positive ECNOS pattern leads to below-average precipitation and significant warming over northeastern China in summer. The reduced soil moisture associated with the earlier spring snowmelt enhances surface warming over Mongolia and northeastern China and the later spring snowmelt leads to surface cooling over Far East in summer, both of which are responsible for the formation of the ECNOS pattern. | Shuping LI Wei HOU Guolin FENG | 2018 | Journal of Meteorological Research2018，32，2： | 0 |
| 17 | Joint Effect of East Asia-Pacific and Eurasian Teleconnections on the Summer Precipitation in North Asia显示文摘The East Asia-Pacific(EAP)and Eurasian(EU)teleconnections are independent of each other on the seasonal timescale(with a correlation coefficient of only 0.03).But they may occur concurrently with consistent or opposite phases.This paper investigates their synergistic effect on the summer precipitation in North Asia.Based on the signs/phases of EAP and EU indices,the EAP and EU teleconnection anomalies occur in four cases:(Ⅰ)positive EAP+positive EU,(Ⅱ)negative EAP+negative EU,(Ⅲ)positive EAP+negative EU,and(Ⅳ)negative EAP+positive EU.Further analyses show that these four configurations of EAP and EU anomalies are coherently related to different atmospheric circulations over the midlatitude Eurasian continent,leading to different summer precipitation modes in North Asia.CategoryⅠ(Ⅱ)corresponds to a zonal tripole structure of the geopotential height at 500 hPa over eastern Europe and the Sea of Japan,leading to less(more)than normal precipitation in eastern Europe,Japan,and the surrounding areas,and more(less)precipitation from central China to Lake Baikal and eastern Russia.CategoryⅢ(Ⅳ)corresponds to a meridional dipole structure of the geopotential height at 500 hPa over North Asia,leading to more(less)precipitation in the northern North Asia and less(more)precipitation in most of the southern North Asia.Independent analysis reveals that the EAP teleconnection itself is positively correlated with the precipitation in the region between the eastern part of Lake Baikal and Okhotsk Sea,and negatively correlated with the precipitation in the region between Northeast China and Japan.Coincidently,the EU pattern and precipitation have negative correlations in Ural Mountain and Okhotsk Sea areas and positive correlations in the Lake Baikal area.The respective relations of EAP and EU with the summer precipitation in North Asia suggest that the EAP northern lobe overlapped with the EU central and eastern lobes could extend the geopotential anomalies over Lake Baikal to Russian Far East,creating an EAP-EU synergistic effect on the summer precipitation in North Asia. | Po HU Guolin FENG Muhammad Mubashar DOGAR Jianbo CHENG Zhiqiang GONG | 2020 | Journal of Meteorological Research2020，34，3： | 0 |
| 18 | Engineering of electrospun nanofiber scaffolds for repairing brain injury显示文摘Patients with brain injury can suffer disability and accompanying complications.Current clinical treatments have significant limitations to successful repair due to the complexity of the pathological processes and the inhibitory microenvironment that follows brain injury.Here,we conclude recent research progresses in engineering strate-gies based on electrospun nanofibers for promoting neural repair and functional recovery after brain injury.Firstly,we introduce the main pathological mechanisms of current brain injuries,pointing out the prospect of the application of electrospun nanofiber scaffolds compared to current clinical treatment strategies.We then discuss the repair strategies combining the structure and the morphology of nanofiber scaffolds with load therapeutic factors such as cells,drugs and growth factors.All of these strategies show potential for improving the repair of brain injury.Finally,we point out the challenges facing the effective treatment of brain injury,aiming to provide insights into the development of repairing scaffolds for brain function recovery from the perspective of clinical treatment. | Wenzhe Du Tong Wang Shuyun Hu Jixin Luan Feng Tian Guolin Ma Jiajia Xue | 2023 | Engineered Regeneration2023，4，3： | 0 |
| 19 | Experimental study of kidney protective effects of sanhuangshaoshangling on severe burn rats in shock stage显示文摘Objective:To observe the protective effects and mechanisms of topical Chinese medicine on kidneys of severe burns shock rats.Methods:Blood urea nitrogen(Bun),creatinine(Cr),myeloperoxidase(MPO),tumor necrosis factor-α(TNF-α)and inter-leukin(IL-6),were checked by the time points of 8,24,48 hours.Blood tests,ELISA and other methods were used for these texts.Results:Compared with the povidone-iodine group,the levels of Bun and Cr were declined apparently in the Sanhuang group,and the activity of MPO was decreased as well.Conclusions:Sanhuangshaoshangling,taking ointment as matrix,can be externally applied to wounds.It contains some ef-fective ingredients which can clear heat-toxicity and promote blood circulation for removing blood stasis,and prevents wounds from the stimulation of the air to nerve endings and the invasion of bacteria.It can also inhibit bacteria from parasitizing,grow-ing,reproducing on the wound.Sanhuangshaoshangling helps blood circulation and facilitates the growth of tissues to inactivate the toxicity or reduce toxin by changing the structure of endotoxin after uptake into tissues.It can protect viscera by reducing the release of endotoxin,facilitating the excretion of endotoxin and weakening or eliminating the effects of TNF-αand IL-6. | Guolin Hu Lingfeng Wang Bo Feng | 2016 | Discussion of Clinical Cases2016，3，3： | 0 |
| 20 | Digestive tract reconstruction in pancreaticoduodenectomy in University Hospitals of China: a national questionnaire survey显示文摘Background Pancreaticoduodenectomy(PD)has been widely applied in general hospitals in China;however,there is still a lack of unified standards for each surgical technique and procedure.This survey is intended to investigate the current status of digestive tract reconstruction after PD in university hospitals in China.Method A cross-sectional survey was conducted among the members of the Young Elite Pancreatic Surgery Club of China by using the Questionnaire for Digestive Tract Reconstruction after Pancreaticoduodenectomy.The questionnaire was disseminated and collected by point-to-point communication via WeChat public platforms.Results A total of 73 valid questionnaires were returned from 65 university hospitals in 28 provincial divisions of China's Mainland.The respondents who performed PD surgery with an annual volume of over 100 cases accounted for 63%.Generally,laparoscopic PD was performed less often than open PD.Child and Whipple reconstructions accounted for 70%and 26%,respectively.The sequence of pancreatoenteric,biliary-enteric,and gastrointestinal reconstruction accounted for 84%of cases.In pancreatoenteric anastomosis,double-layer anastomosis is the most commonly employed type,accounting for approximately 67%,while single-layer anastomosis accounts for 30%.Of the double-layer anastomoses,duct-to-mucosa/dunking(94%/4%)PJ was performed with duct-mucosa using the Blumgart method(39%)and Cattel-Warren(29%),with continuous/interrupted sutures in the inner layer(69%/31%)and continuous/interrupted sutures in the outer layer(53%/23%).In single-layer anastomosis,continuous/interrupted sutures accounted for 41%/45%.In hepatojejunostomy,single-layer/double-layer suture accounted for 79%/4%,and continuous/interrupted suture accounted for 75%/9%.Forty-six percent of the responding units had not applied double-layer biliary-intestinal anastomosis in the last 3 years,75%of the responding surgeons chose the anastomosis method according to bile duct diameter,with absorbable/non-absorbable suture accounting for 86%/12%.PD/pylorus-preserving PD accounted for 79%/11%of GJ cases,the distance between GJ and HJ<30 cm,30-50 cm and>50 cm were 11%,75%,and 14%,respectively.Antecolic/retrocolic GJ accounted for 71%/23%of cases.Twenty-two percent of GJ cases employed Braun anastomosis,while 55%and 19%of GJ cases used linear cutting staplers/tube-type staplers,respectively;60%/14%were reinforced/not reinforced via manual suturing after stapler anastomosis.Manual anastomosis in GJ surgery employed absorbable/non-absorbable sutures(91%/9%).Significant differences in reconstruction techniques were detected between different volumes of PD procedures(<100/year and>100/year),regions with different economic development levels,and between north and south China.Conclusion Digestive tract reconstruction following PD exists heterogeneity in Chinese university hospitals.Corresponding prospective clinical studies are needed to determine the consensus on pancreatic surgery that meets the clinical reality in China. | Jishu Wei Qiang Xu Yuhua Zhang Jiabin Jin Xiaodong Tian Qiaofei Liu Zipeng Lu Zheng Wang Shanmiao Gou Song Gao Xianlin Han Yefei Rong Niandong Ji Ye Lin Guolin Li Shi Chen Feng Cao Hua Chen Wenming Wu Yupei Zhao the Young Elite Pancreatic Surgery Club of China | 2022 | Journal of Pancreatology2022，5，3： | 0 |
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