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Higher level twisted Zhu algebras  [PDF]
Jethro Van Ekeren
Mathematics , 2011, DOI: 10.1063/1.3589214
Abstract: The study of twisted representations of graded vertex algebras is important for understanding orbifold models in conformal field theory. In this paper we consider the general set-up of a vertex algebra $V$, graded by $\G/\Z$ for some subgroup $\G$ of $\R$ containing $\Z$, and with a Hamiltonian operator $H$ having real (but not necessarily integer) eigenvalues. We construct the directed system of twisted level $p$ Zhu algebras $\zhu_{p, \G}(V)$, and we prove the following theorems: For each $p$ there is a bijection between the irreducible $\zhu_{p, \G}(V)$-modules and the irreducible $\G$-twisted positive energy $V$-modules, and $V$ is $(\G, H)$-rational if and only if all its Zhu algebras $\zhu_{p, \G}(V)$ are finite dimensional and semisimple. The main novelty is the removal of the assumption of integer eigenvalues for $H$. We provide an explicit description of the level $p$ Zhu algebras of a universal enveloping vertex algebra, in particular of the Virasoro vertex algebra $\vir^c$ and the universal affine Kac-Moody vertex algebra $V^k(\g)$ at non-critical level. We also compute the inverse limits of these directed systems of algebras.
“云伏苓”的接种栽培经验  [PDF]
袁恒顺
中国中药杂志 , 1957,
Abstract: <正>云南所产茯苓称为云苓,素享盛名。产量也頗为丰富,年产40—60万斤。惜昔为野生,不仅採收不易,而且常因採挖茯苓破坏农林生产?特將我省馬龙县栽培茯苓有40余年的苗族老药农張長好的經驗,加以总結介紹,以供有关方面参考。栽培方法:採收茯苓时,把“馬脚桿”、“穿心扛”等劣品留下作为种苗,俗称脚苓。脚苓的外皮像树皮,皮下即有茯苓菌絲,心是寄主的木材部分。在伐木后2—15天內的任何一天(过期無效),趁留下树椿的椿头水分未干,掘土見根,
A note on the holomorphic invariants of Tian-Zhu  [PDF]
Zhiqin Lu
Mathematics , 2005,
Abstract: In this paper, we compute the Tian-Zhu invariant on hypersurfaces of complex projective spaces.
《四库全书》官员献书群体考略  [PDF]
吴元
图书馆工作与研究 , 2015,
Abstract: ?私人进呈本是纂修《四库全书》的主要来源之一。私人献书家不仅包括江浙著名藏书家,而且还有许多官员投入其中。《四库采进书目》收录了部分在京官员的献书情况,除此之外还有大量的官员献书未被收入其中。本文对《四库全书》官员献书群体作更为细致的划分,有助于我们更好的看待征书令下社会各阶层的反应。
献改优63高产栽培研究  [PDF]
孙进东 , 张彪 , 蔡建中 , 吕贵才 , 李德剑 , 袁汉根 , 娄金贵 , 张永江
扬州大学学报(农业与生命科学版) , 1991,
Abstract: ????1988~1989年在兴化市对杂交水稻献改优63栽培特性、群体发展、净光合强度、灌浆速率和植株状况进行了分析研究。结果表明,产量构成因素中,每穗总粒数对产量的作用最大、每亩穗数其次,结实率第三,千粒重最小。高产的理想株型呈“腰鼓形”。结果还表明,该品种基部节间大维管束的截面积、穗型,叶面积指数大,叶积、净光合速率、干物质生产率高,有一定的生产潜力。但该品种结实率不稳。多效唑对调节株型和库-源关系有一定的作用。本文提出了一条中期早控、后期稳促、主攻大穗、增加每亩总颖花量的高产栽培途径。
五苓散临床应用和实验研究近况  [PDF]
刘泰
中国中医药信息杂志 , 1999,
Abstract: 五苓散手《伤寒论》名方。现代医家广泛应用于临床各科,并进一步开展了实验研究以阐述其作用机制。现将近10年的有关研究概述如下。1临床应用李氏等对应用五苓散治疗的478例进行病种分析,发现用于治疗的前10位病种依次是水肿、泄泻、癃闭、痰饮、臌胀、水疝、淋证、水逆、蓄水、眩晕。舌象、脉象、症状表现居前位的是小便不利、水肿、口渴、乏力、纳差、腹胀、苔薄白、苔白腻、舌淡、脉沉。认为五苓散针对的基本病机是脾虚健运失常、气化不行而致水湿内停。
双参苓颗粒质量标准研究  [PDF]
赵晓霞,张永丽,马田田,张新艳
中国中医药信息杂志 , 2010, DOI: 10.3969/j.issn.1005-5304.2010.09.019
Abstract: 目的建立双参苓颗粒的质量标准。方法对制剂中的鹿茸和冬虫夏草进行显微鉴别;采用薄层色谱法对制剂中人参、丹参、山茱萸进行定性鉴别研究;用高效液相色谱法对有效成分黄芪甲苷进行含量测定,选用zorbaxrx-c18(4.6mm×250mm,5?m)色谱柱,乙腈-水(31∶69)为流动相,流速1.0ml/min,蒸发光散射检测,柱温30℃。结果建立了双参苓颗粒的质量标准,包括鹿茸和冬虫夏草的显微鉴别,人参、丹参、山茱萸的薄层鉴别方法和有效成分黄芪甲苷的含量测定方法。结论该方法能很好地控制产品的质量,可以作为双参苓颗粒的质量标准。
首都部分名医为灾区人民献方  [PDF]
王凤歧,沙凤桐,苏刚强
中国中药杂志 , 1991,
Abstract: 为了帮劝我国南方水灾地区人民积极防病治病,本刊现部分转载《中国中医药报》刊出的首都名老中医救灾防病献方,以充分发挥我国传统医药优势,为灾区人民抗灾治病作贡献。
The regular representation, Zhu's $A(V)$-theory and induced modules  [PDF]
Haisheng Li
Mathematics , 1999,
Abstract: The regular representation is related to Zhu's $A(V)$-theory and an induced module from an $A(V)$-module to a $V$-module is defined in terms of the regular representation. As an application, a new proof of Frenkel and Zhu's fusion rule theorem is obtained.
Zhu's Theorem and an algebraic characterization of conformal blocks  [PDF]
Andrew Neitzke
Mathematics , 2000,
Abstract: Working in the axiomatic framework recently proposed by Gaberdiel and Goddard, we prove a generalized version of Zhu's Theorem; for any chiral bosonic conformal field theory on the sphere, our result characterizes the chiral blocks in terms of a certain quotient of the Fock space. We also establish, under a finiteness hypothesis closely related to rationality of the theory, that the relevant Knizhnik-Zamolodchikov-type equation admits solutions.
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