工业革命以来,技术与经济高速发展,社会奉行科技至上。随着资本主义的不断扩张,经济繁荣的表面之下,价值的沦丧和人性的扭曲充分暴露了出来,整个社会亟待解救。本雅明的“救
A hypersubstitution is a map which takes n-ary operation symbols to n-ary terms. Any such map can be uniquely extended to a map defined on the set Wτ(X)of all
It is shown that for an arbitrary finite group G, there exists a oneone correspondence between the irreducible characters of G and its conjugacy classes such th
In crisp environment, the notion of cyclic group on a set is well known. We study an extension of this classical notion to the fuzzy sets to define the concept
For near-ring ideal mappings p1 and p2, we investigate radical theoretical properties of and the relationship among the class pairs (p1: p2), (Sp2: Sp1) and (Rp
A simple condition is given for a projective module to be free, in terms of the matrix presenting it. This leads to a criterion for a ring to be projective-free
水稻是我国主要的粮食作物,螟虫灾害对其生长制约严重,每年造成的损失也相当严重。培育抗螟虫的水稻品种,实现少投入、高产出、保护环境,是绿色超级稻的育种目标之一。近10年来,我校已经成功地将多个Bt基因导入到水稻中,并得到了有效、稳定的表达,螟虫抗性达到98%以上。其中导入cry1C*基因的T1C-19是抗螟虫表现最好的转基因材料之一,已经申请生产性试验。本研究以T1C-19为供体亲本,与镇恢084和
以宁粳3号和南粳44水稻品种为材料,分别进行密度和施氮量试验,研究了分蘖各叶片叶面积与主茎同伸叶片叶面积的关系及其主茎各叶龄期不同蘖位分蘖的绿叶面积和干重与主茎绿叶面
澧县全国植棉劳模赵丕柏根据当地的气候、土壤特点,通过多年实践,不断改进,逐步模 索出一套棉花高产栽培经验。 1.选用优良品种。赵劳模种的11亩棉地全部采用“泗棉二号”良