简介：汉语的“N的V”难题，长期以来备受关注但却一直得不到妥善的解决，根本原因在于我们忽略了“N的V”的语篇性，误将一个语篇问题当成是一个句法问题来研究。虽然也有学者很早就发现“N的V”的语篇回指功能，可惜没有抓住这一点深入地挖掘下去。其实，“回指”是解决“N的V”一切问题的关键。抓住了这一点，就能从“N的V”回指对象的事件性中推知“N的V”的事件性，进而得出V的事件性。在此基础上，可以很自然得到这样的结论：“N的V”中的V是一个动词，但与普通动词不同：此时的V是一个指代用法，指代的是“V事件”。有了这一结论，“向心结构”难题就不再是难题，由此衍生出的相关问题也迎刃而解了。

简介：ＱＵＡＬＩＴＡＴＩＶＥＳＴＵＤＹＯＦＳＩＡＬＯＭＵＣＩＮＳＣＨＡＮＧＥＳＤＵＲＩＮＧＮ－ＭＥＴＨＹＬ－Ｎ－ＮＩＴＲＯＳＯＵＲＥＡ－ＩＮＤＵＣＥＤＣＯＬＯＮＩＣＣＡＲＣＩＮＯＧＥＮＥＳＩＳＩＮＭＩＣＥＷａｎｇＱｉａｎｇ王强；ＷａｎｇＹｕａｎｈｅ王元和；...

简介：本文研究了地表水源水一年中NH3－N，NO2－N含量与季节变化的关系，总结出一定的规律，从而对水质处理提供可靠的数据。

简介：利用廉价易得的2-呋哺甲醛、2-噻吩甲醛、2-吡啶甲醛等杂环芳甲醛以及正丁胺、苯胺等脂肪及芳香伯胺等为原料，在温和的实验条件下，合成了18种N，N（O，S）-亚胺类双齿配体。得到了优良的分离收率，最高达到了97％。产物为液体或固体化合物，分别测定了固体的熔点，并通过核磁共振谱（1HNMR及13CNMR）及高分辨飞行时问质谱（HRMS）对所得产物的组成及结构进行了表征，表明其与目标化合物相符。

简介：InviewofthelimitationsofaRn-GnmodelinthelowfrequencyrangeandthedefectsofanEn-Inmodelincommonusenow,thispaperbuildsacompleteEn-Inmodelaccordingtothetheoryofrandomharmonic.Theparametersforthelow-noisedesignsuchastheequivalentinputnoisyvoltageEns,theoptimumsourceimpedanceZsoptandtheminimumnoisefigureFmincanbecalculatedaccuratelybyusingthisEn-Inmodelbecauseitconsidersthecoherencebetweenthenoisesourcesfully.Moreover,thispaperpointsoutthatitwillcausethemaximum30%miscalculationwhenneglectingtheeffectsofthecorrelationcoefficient7.Usingtheseries-seriescircuitsasanexample,thispaperdiscussesthemethodsfortheEn-InnoiseanalysisofelectroniccircuitspreliminarilyanddemonstratesitscorrectnessthroughthecomparisonbetweenthesimulatedandmeasuredresultsoftheminimumnoisefigureFminofasinglecurrentseriesnegativefeedbackcircuit.

简介：PotexperimentswerecarriedouttoestimateN2fixationbyvetch,milkvetch,sicklealfalfaandbroadbeaninpurestandusinga^15N-labelledsoil.Winterwheatwasusedasthenon-fixingcontrol.The15N-labelledsoilusedwaspreparedbygrowingcorn-wheat-cornsuccessivelyonanearlyorganic-matter-freeXiashuloesssupplementedwithadequateamountsof(15NH4)2SO4,P,Kandmicronutrients,thenincorporatingthese15N-labelledplantmaterialsintothesoilaftereachhavest,andallowingtheplantmaterialstobedecomposedaerobicallyfor410dafterincorporationoftheplantmaterialofthethirecrop.The15Nenrichmentofwheatplant-Nvariedslightlywithorgans,withamaximumdifferenceof9.8%,Basedon15NenrichmentofsoilNinferredfromthemeanvalueofthe15Nenrichmentindifferentorgansofwheat79%-91%oftotalNinthetopsand67%-74%oftotalNintherootsoflegumesstudiedwerederivedfromatmosphere.EstimatebyisotopedilutionmethodwasingoodagreementwiththatbytheconventionaldifferencemethodprovidedvaluesobtainedbythelatterwerecorrectedforseedN,andalsowiththatfromthemeasurementofNaccumulatedinthetopsofthelegumes.

简介：摘要：“有+V+N1+自+N2”结构是甲骨卜辞中的一种特殊语法现象，学界对其结构的判定一直争论不断。本文从“V+N1”的结构和“自+N2”的语义指向两个方面进行阐述，以此来论证甲骨卜辞中的“有+V+N1+自+N2”结构为存现动词“有”搭配谓词性宾语的典型用法。在“有+V+N1+自+N2”结构中，“有”是谓语中心，“V+N1+自+N2”作“有”的宾语，“N1”实为“V”的宾语，“自+N2”为“V”的补语。

简介：运用Lagrange级数展开法,获得了三角级数S_m(n)=sumfromk=1to2kncos~m(2kπ)/(2n+1)的求和公式1,主要结果本文借助于Lagrange级数展开法获得了下列结论:定理:设S_m(n)=sumfromk=1toncos~m(2kπ)/(2n+1),则有这里m为自然数,[x]表示x的最大整数部分,(?)为二项式系数

简介：不听话的数学题这周末两天怎么过得这么快，一眨眼就过去了!可童彤的数学作业还空着两大计算题呢。一放下晚餐的筷子，他便三下五除二做完了。可当他再瞄一眼时，发现自己在解方程去分母时，慌里慌张算错了。“哎，以下全白忙乎了。”他急急拿起橡皮擦，没两下就把作业纸给擦破了。这下，童彤烦了，把橡皮擦往墙角一扔，一道弧线。还没容他眨眼，墙角冒出一缕青烟。

简介：自从NECN8凭借着65536色的高品质TFT屏幕初入彩屏机市场，NEC的手机就一直保持住了屏幕领先的地位。而其浓厚的日式的手机风格，也在国内市场中独树一帜，也有着一定数量的簇拥者。这次向大家介绍的NEC最新款N820则把日式手机的特色演绎到了一个新的高度。

简介：AbstractObjective:The prevalence of midline birth defects, such as gastroschisis, has increased worldwide, over the last few decades. This study aims to explore the prevalence, maternal epidemiological characteristics, and natural history of neonates affected by gastroschisis at the University Hospital of León city, Nicaragua.Methods:Data were collected from the birth defect surveillance system of the Hospital Oscar Danilo Rosales (HEODRA). The analysis included all pregnancies that had gastroschisis complications between January 1 and December 31, 2020. The prevalence of gastroschisis was calculated according to maternal age. The mothers were interviewed, and the clinical records of the newborns were reviewed.Results:Among the 4,460 deliveries included in this study, four cases of gastroschisis were identified, including three live births and one stillbirth. The gastroschisis rate was 8.9 per 10,000 live births (95% confidence interval [CI]: 0.18-17.8). The prevalence among mothers younger than 20 years and those older than 20 years was 26.4 (95% CI: -3.43 to 56.25) and 3.01 (95% CI: 2.89-8.90)/10,000 births, respectively. Mothers of gastroschisis-affected fetuses were of rural origin (n = 3), had normal body mass indexes (n = 3), were exposed to tobacco and wood smoke (n = 2), and one was exposed to pesticides during the periconceptional period. Primary closure of the gastroschisis was performed on one patient, and complex gastroschisis for intestinal perforation was observed in another patient. The mean hospitalization duration was 33 days, and two patients were discharged alive.Conclusions:Gastroschisis was a significant birth defect among children delivered at HEODRA in 2020. Its prevalence in Nicaragua was higher than that in other countries in the region. All complicated pregnancies were young women with unplanned pregnancies, from rural areas, with exposure to secondhand smoke, and without vitamin supplements before or during the first trimester of pregnancy. Only 67% of infants survived after hospital discharge.

简介：食人花真的存在吗？蘑菇也能当武器吗？世界上最短命的种子是什么？总在同一棵树下尿尿,树会死吗？一次性筷子能毁灭地球吗？原来除了动物之外,植物也隐藏着深奥的科学知识。生活在地球上的植物,究竟拥有多少不为人知的秘密？翻开《大豆的N种死法》,你会有很多意想不到的发现。这一次,让我们跟随果壳科学达人们生动幽默、妙趣横生的文字．去揭开植物世界的奥秘，一起来大嚼科学吧!

简介：小明家厨房蚂蚁成灾,于是他向同学们求助,同学们想出来的一些灭蚁办法,读后令人捧腹大笑.如果你有消灭蚂蚁的高招,请来信告诉我吧!别忘了,随信把答题卡一起寄来哦!

简介：Hey,guys!来聊一聊接下来想干的事儿吧!You’rebusy？不用花费很多时间。你要做的。只是听我们说完（哪怕你觉得这真的只是个“白日梦”），再积极地回应，并毫不吝啬地给予肯定。毕竟——“梦想总是要有的。万一实现了呢？”

简介：细节决定成败.创办一年来,历经风雨,屡见彩虹,有无数个细节,如人体的关节一样,环环相扣,紧密结合,把身上的各个部位联成一体,生成活力,支撑了自身应负的责任.值出刊周岁来临之际,特录主编该刊一年来所见所闻的N个细节,聊备案头,记录成长.

简介：Itisknownfromclassicaldifferentialgeometrythatonecanreconstructacurvewith(n-1)prescribedcurvaturefunctions,ifthesefunctionscanbedifferentiatedacertainnumberoftimesintheusualsenseandifthefirst(n-2)functionsarestrictlypositive.ItisestablishedherethatthisresultstillholdsundertheassumptionthatthecurvaturefunctionsbelongtosomeSobolevspaces,byusingthenotionofderivativeinthedistributionalsense.ItisalsoshownthatthemappingwhichassociateswithsuchprescribedcurvaturefunctionsthereconstructedcurveisofclassC∞.

简介：什么样的企业才能拿到未来商业奥林匹克的入场券？请对照以下刻度，审视自己的商业模式。如果一项指标也未达到，那么你的公司危矣——不管它现在看起来如何强大，都难以承受将来的冲击。

简介：一首首慷慨激昂的乐曲、一个个纯真质朴的故事、一张张精彩瞬间的相片。迎看火红的朝阳，踏看红色的足迹，每一天都是崭新的。

简介：熟知NECN910手机的朋友一定知道N910最吸引MM的就是它那小巧玲珑，如粉盒般的外表，而对于NEC来说，这一精髓之处自然不会舍弃，所以N916的57mm×52mm×20.2mm三维尺寸和74克的机身重量，让N916成为了N910的继任者。作为MM专用机的继任者，其外观较之N910更加的精致，并且线条也更加的柔和，甚至连外置天线都是同样的设计风格，而不像N910那样的棱角分明。

简介：你曾为看不清老师在黑板上的板书而烦恼过吗?你曾为丢失了课本或作业本而焦虑过吗?你曾为不能在课堂上和老师即时交流而遗憾过吗?……为了解决上述种种问题,英国的科研人员把电脑与课桌相结合,研制