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How can the neutrino interact with the electromagnetic field？

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Chinese Physics C 2018年第1期42卷 23-31页

作者： M.Novello C.e.L.Ducap Centro Brasileiro de Pesquisas Fisicas (CeAC/CBPF) Rua Dr. Xavier Sigaud 150 CEP 22290-180 Rio de Janeiro Brazil

Maxwell electrodynamics in the fixed Minkowski space-time background can be described in an equivalent way in a curved Riemannian geometry that depends on the electromagnetic field and that we call the electromagnetic metric（e-metric for short）. After showing such geometric equivalence we investigate the possibility that new processes dependent on the e-metric are allowed. In particular, for very high values of the field, a direct coupling of uncharged particles to the electromagnetic field may appear.

关键词： neutrino electromagnetic field effective metric

Numerical analysis of rapid drawdown: Applications in real cases

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Water Science and engineering 2016年第3期9卷 175-182页

作者： eduardo e. Alonso Nuria M. Pinyol Department of Civil and environmental engineering Universitat Politecnica de Catalunya (UPC) Barcelona 08034 Spain Centre Internacional de Metodes Numerics en enginyeria (CIMNe) Barcelona 08034 Spain

In this study, rapid drawdown scenarios were analyzed by means of numerical examples as well as modeling of real cases with in situ measurements. The aim of the study was to evaluate different approaches available for calculating pore water pressure distributions during and after a drawdown. To do that, a single slope subjected to a drawdown was first analyzed under different calculation alternatives, and numerical results were discussed. Simple methods, such as undrained analysis and pure flow analysis, implicitly assuming a rigid soil skeleton, lead to significant errors in pore water pressure distributions when compared with coupled flow-deformation analysis. A similar analysis was performed for the upstream slope of the Glen Shira Dam, Scotland, and numerical results were compared with field measurements during a controlled drawdown. Field records indicate that classical undrained calculations are conservative but unrealistic. Then, a recent case of a major landslide triggered by a rapid drawdown in a reservoir was interpreted. A key aspect of the case was the correct characterization of permeability of a representative soil profile. This was achieved by combining laboratory test results and a back analysis of pore water pressure time records during a period of reservoir water level fluctuations. The results highlight the difficulty of predicting whether the pore water pressure is overestimated or underestimated when using simplified approaches, and it is concluded that predicting the pore water pressure distribution in a slope after a rapid drawdown requires a coupled flow-deformation analysis in saturated and unsaturated porous media.

关键词： Hydro-mechanical coupling Coupled flow-deformation analysis Numerical analysis Drawdown Landslide Pore water pressure

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绝密战争

绝密战争

基于立德树人守正创新人文关怀的中医外科临床带教思政教育融入探索——以乳腺疾病为例

作者： R.v.·琼斯(R.v. Jones)

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中国中医药现代远程教育 2024年第5期22卷 26-29页

作者：马丙娥赵正平南京中医药大学附属中西医结合医院甲乳外科江苏南京210028

结合中医外科学课程特点,将思政教育融入课程教学以及临床带教中,以专业知识为载体,结合立德树人,守正创新,人文关怀设计教学内容和形式,在临床带教中融入思政教育。以乳腺疾病为例,基于思政理念,通过课堂内外、典型病案及借助模型教具... 详细信息

结合中医外科学课程特点,将思政教育融入课程教学以及临床带教中,以专业知识为载体,结合立德树人,守正创新,人文关怀设计教学内容和形式,在临床带教中融入思政教育。以乳腺疾病为例,基于思政理念,通过课堂内外、典型病案及借助模型教具等多种教学模式,以乳腺疾病的“点”带动中医外科学的“面”,提高学生职业责任感和自豪感,培养学生良好的专业素养。

关键词：中医外科学思政教育临床带教教学改革

effects of mountain pine beetle-killed forests on source water contributions to streamflow in headwater streams of the Colorado Rocky Mountains

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Frontiers of earth Science 2017年第3期11卷 496-504页

作者： Christine e. WeHNeR John D. STeDNICK Watershed Science Program College of Natural Resources Colorado State University Fort Collins CO 80523-1472 USA

Natural or human-influenced disturbances are important to the health and diversity of forests, which in turn, are important to the water quantity and quality exported from a catchment. However, human-induced disturbances （prescribed fire and harvesting） have been decreasing, and natural disturbances （fires and insects） have been increasing in frequency and severity. One such natural disturbance is the mountain pine beetle （MPB）, （Denclroctonus ponderosae） an endemic species. A recent epidemic resulted in the mortality of millions of hectares of lodgepole pine （Pinus contorta） forests in Colorado, USA. Beetle-induced tree mortality brings about changes to the hydrologic cycle, including decreased transpiration and interception with the loss of canopy cover. This study examined the effect of the mountain pine beetle kill on source water contributions to streamflow in snowmelt- dominated headwater catchments using stable isotopes （2H and ~80） as tracers. Study catchments with varying level of beetle-killed forest area （6% to 97%） were sampled for groundwater, surface water, and precipitation. Streams were sampled to assess whether beetle-killed forests have altered source water contributions to streamflow. Ground- water contributions increased with increasing beetle-killed forest area （p = 0.008）. Both rain and snow contributions were negatively correlated with beetle-killed forest area （p = 0.035 and p = 0.011, respectively）. As the beetle-killed forest area increases, so does fractional groundwater contribution to streamflow.

关键词： mountain pine beetle isotope tracers stream-flow generation headwaters

Mudcake effects on wellbore stress and fracture initiation pressure and implications for wellbore strengthening

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Petroleum Science 2018年第2期15卷 319-334页

作者： Yongcun Feng Xiaorong Li K.e.Gray The University of Texas at Austin AustinTXUSA

Although a large volume of mudcake filtration test data is available in the literature, effects of mudcake on wellbore strengthening cannot be quantified without incorporating the data into a stress-analysis model. Traditional models for determining fracture initiation pressure （FIP） either consider a wellbore with an impermeable mudcake or with no mudcake at all. An analytical model considering permeable mudcake is proposed in this paper. The model can predict pore pressure and stress profiles around the wellbore, and consequently the FIP, for different mudcake thickness, permeability, and strength. Numerical examples are provided to illustrate the effects of these mudcake parameters. The results show that a low-permeability mudcake enhances FIP, mainly through restricting fluid seepage and pore pressure increase in the near- wellbore region, rather than by mudcake strength. Fluid loss pressure （FLP） should be distinguished from FIP when a mudcake is present on the wellbore wall. Fracture may occur behind the mudcake at FIP without mudcake rupture. The small effect of mudcake strength on FIP does not mean its effect on FLP is small too. Mudcake strength may play an important role in maintaining integrity of the wellbore once a fracture has initiated behind the mudcake.

关键词： Mudcake Hoop stress Fracture initiation pressure Fluid loss pressure Wellbore strengthening

ReGULATION OF GI MOTOR FUNCTION：ROLeOFBRAINPePTIDeS．

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World Journal of Gastroenterology 1996年第S1期2卷 30-31页

作者： v Martinez Y Tache v Martinez Y Tache CURE: Diseases Research Center West Los Angeles VA Medical Center. Department of Medicine and Brain Research Institute UCLA Los Angeles CA 90073 United States

ＲＥＧＵＬＡＴＩＯＮＯＦＧＩＭＯＴＯＲＦＵＮＣＴＩＯＮ：ＲＯＬＥＯＦＢＲＡＩＮＰＥＰＴＩＤＥＳ．Ｖ．ＭａｒｔｉｎｅｚａｎｄＹ．Ｔａｃｈｅ，ＣＵＲＥ：ＤｉｓｅａｅｓＲｅｓｅｒｃｈＣｅｎｔｅｒ，ＷｅｓｔＬｏｓＡｎｇｅｌｅ...

ＲＥＧＵＬＡＴＩＯＮＯＦＧＩＭＯＴＯＲＦＵＮＣＴＩＯＮ：ＲＯＬＥＯＦＢＲＡＩＮＰＥＰＴＩＤＥＳ．Ｖ．ＭａｒｔｉｎｅｚａｎｄＹ．Ｔａｃｈｅ，ＣＵＲＥ：ＤｉｓｅａｅｓＲｅｓｅｒｃｈＣｅｎｔｅｒ，ＷｅｓｔＬｏｓＡｎｇｅｌｅｓＶＡＭｅｄｉｃａｌＣｅｎｔｅｒ．...

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Shuram-Wonoka carbon isotope excursion:ediacaran revolution in the world ocean's meridional overturning circulation

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Geoscience Frontiers 2018年第2期9卷 391-402页

作者： George e.Williams Phillip W.Schmidt Department of earth Sciences University of Adelaide Magneticearth

The late ediacaran Shuram-Wonoka excursion, with δ^(13)C_(carb) values as low as-12‰(PDB) in marineshelf deposits and spanning up to 10 Myr, is the deepest and most protracted δ^(13)C_(carb) negative anomaly recognised in earth history. The excursion formed on at least four continents in low(≤32°) palaeolatitudes, and in China is associated with a major phosphogenic event. Global and intrabasinal correlation, magnetostratigraphy, isotope conglomerate tests and further geochemical data are consistent with a primary or syn-depositional origin for the excursion. Continental-margin phosphorites are generated by oceanic upwelling driven by surface winds, and δ^(13)C_(carb) negative anomalies are explicable by oceanic upwelling of 13 C-depleted deep oceanic waters, arguing that a feature common to these exceptional ediacaran events was unprecedented perturbation of the world ocean. These events occurred during the transition from an alien Proterozoic world marked by low-palaeolatitude glaciation near sea level and strong seasonality to the familiar Phanerozoic earth with circum-polar glaciation and temperate climate, suggesting that the Shuram-Wonoka excursion is related to this profound change in earth's climate system. Of various hypotheses for Proterozoic low-palaeolatitude glaciation, only the high obliquity(>54°) hypothesis, which posits secular decrease in obliquity to near the present-day value(23.5°) during the ediacaran, predicts an unparalleled revolution in the ediacaran world ocean. The obliquity controls the sense of the world ocean's meridional overturning circulation, which today is driven by the sinking of cold, dense water at the poles and upwelling driven by zonal surface *** the decreasing obliquity passed the critical value of 54° during the ediacaran the meridional temperature gradient reversed, with the equator becoming warmer than the poles and Hadley lowlatitude(eric zonal circulation reversing. This reversal of the temperat

关键词： ediacaran Shuram-Wonoka carbon isotope excursion Oceanic meridional circulation Atmospheric circulation Proterozoic paleoclimate Obliquity of the ecliptic

Graded methionine dietary inclusions influence growth performance and apparent ileal amino acid digestibility coefficients and disappearance rates in broiler chickens

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Animal Nutrition 2022年第1期8卷 160-168页

作者： Shemil P.Macelline Peter v.Chrystal Leon R.McQuade Bernard v.Mclnerney Yangsu Kim Yumin Bao Peter H.Selle Sonia Y.Liu Poultry Research Foundation The University of SydneyCamdenNSW2570Australia School of Life and environmental Sciences Faculty of ScienceThe University of SydneySydneyNSW2006Australia Baiada Poultry Ltd Pendle HillNSW2145Australia Australian Proteome Analysis Facility Macquarie UniversitySydneyNSW2109Australia CJ Bio 330Dongho-roJung-guSeoul100-400Republic of Korea Redox Pty Ltd MintoNSW2566Australia Sydney School of veterinary Science The University of SydneyCamdenNSW2570Australia

Graded quantities of 1.38,2.76 and 4.14 g/kg L-methionine were included in a control diet formulated to contain 3.07 g/kg digestible *** of the 4 dietary treatments was offered to 6 replicate cages(initially 8 birds per cage)from 1 to 21 d *** parameters assessed included growth performance,nutrient utilisation(apparent metabolisable energy[AMe],AMe:Ge ratios,N retention,Ncorrected apparent metabolisable energy[AMen]),apparent digestibility coefficients and disappearance rates of amino acids in the distal *** also included free amino concentrations in systemic plasma(brachial vein)at 20 d postehatch and in hepatic tissue at 14 and 21 d *** L-methionine inclusions quadratically influenced weight gain(r=0.688;P=0.001)and FCR(r=0.780;Pe deduced from the quadratic regressions that 3.43 g/kg L-methionine supported maximum weight gain of 1,036 g/kg and 3.50 g/kg L-methionine minimum FCR of 1.193,from 1 to 21 d *** control diet contained specified levels of 3.07 g/kg digestible methionine and 13.0 g/kg digestible ***,an inclusion of 3.465 g/kg L-methionine corresponded to a total of 6.535 g/kg methionine or a methionine-to-lysine ratio of 50.3,which is higher than standard *** implications of this and other outcomes of the present study are reported and discussed.

关键词： Amino acid Broiler chicken Methionine