新一代数字电视机的研究

本文介绍了我们开发和研制的新一代ＤＩＧＩＴ３０００系列数字彩色电视接收机,主要介绍了这种新型数字电视机的功能,硬件电路组成和软件设计特色与实现方法。     

地面驱动螺杆泵采油系统抽油杆柱运动模型

根据垂直井地面驱动螺杆泵采油系统的工作特点,利用抽油杆柱的动力学分析结果,建立了抽油杆柱运动模型,并给出了其有限差分解。利用该模型,可以根据在地面测试的光杆扭矩变化规律计算出井筒中任意部位及螺杆泵处抽油杆扭矩的变化情况,也可根据螺杆泵处抽油杆扭矩变化来预测光杆扭矩的变化。     

空青山次生栎林细根周转

对苏南空青山次生栎林细根周转进行了研究,结果表明,栎林细根的年周转率为０．３７,活细根和死细根的生物量分别为１６８０９．１７ｋｇ／ｈｍ＾２和３２７３．０４ｋｇ／ｈｍ＾２,细根年生长量为６１９２．４３ｋｇ／ｈｍ＾２,约占地上部分净初级生产力总量的４７％,细根年死亡量为４３．０２．３１ｋｇ／ｈｍ＾２,占地上部分年凋落物总量的４５％。因此,在森林生态系统养分循环和凋落物中,细根对归还土壤养分起着重要作用     

基于空间分布实体超媒体管理的建模研究

基于传统的Ｅ－Ｒ模型,结合分布式对象管理的特点给出了一个基于空间分布实体的超媒体管理模型。该模型使用域、实体、侧面、属性、链、媒质等概念构建系统;顺和注册服务器,来透明地处理客户请求,从而实现一个多级开放的,分布的客户－服务器体系,其特点是可快速建立开放灵活的应用系统。     

低氮营养与激动素对离体黄瓜子叶花芽分化的影响

以黄瓜（ＣｕｃｕｎｉｓｓａｔｉｖｕｓＬ．）子叶为材料,探讨了低氮营养与激动素对子叶花芽分化的影响,总氮量为ＭＳ培养基的一半,ＮＯ＾－３／ＮＨ＾＋４比值为２：１时花芽分化受到显著促进,低浓度的激动素（０．１ｍｇ／Ｌ）对于叶花芽间接分化具有明显的促进作用,高浓度的激动素（１．５ｍｇ／Ｌ）则对花芽的直接分化有促进作用,低氮营养下施以０．１ｍｇ／Ｌ激动素的促进作用显著高于二者单独作用的效果,分期取样进行酶     

双向编程遥控的电话线联网警戒系统设计

介绍一种可双向编程遥控的电话线联网警戒系统,讨论了硬件实现,数据传输格式,软件设计。     

Preparation,crystal structure and quantum chemical investigation of [Li(NTO) (H2O)]

[Li(NTO)(H₂O)₂] was prepared by mixing the aqueous solution of 3-nitro-1,2,4-triazol-5-one (NTO) and lithium hydroxide. The crystal structure of [Li(NTO)(H₂O)₂] was determined by single crystal diffraction analysis. The crystal is monoclinic, space group P2₁/n with crystal parameters of a = 0.742 0(2) nm, b = 0.344 9(1) nm,c = 2.490 6(3) nm, β= 94.89(1)°, Z = 4,D _c , = 1.799 g cm⁻³,V = 0.635 nm³, μ = 1.591 cm⁻¹, F(000) = 392. The finalR is 0.051. The MNDO MO calculation shows that the coordinate bonds of title compound possess certain extent of covalent character. O₂ atom of NTO anion is bonded to Li atom; the nitro group will be lost first when NTO is decomposed.     

Immunohistochemical localization of gonadotropin-releasing hormone receptors (GnRHR) in the nervous system, Hatschek’s pit and gonads of amphioxus,Branchiostoma belcheri

Using gonadotropin-releasing hormone (GnRH) anti-idiotypic antibodies and APA immunohistochemical method, the immunoreactivity of GnRHR in the nervous system, Hatschek’s pit and gonads of amphioxus has been located. It is found for the first time that the immunoreactivity of GnRHR exists in the nerve cells and fibers in the amphioxus’s brain and nerve tube and the epithelial cells of Hatschek’s pit at the different stages of gonadal development. At the same time, it is also found that GnRHR also exists in the ovary and testis of different developed stages. These findings provide morphological new proof for the informative transfer and regulation between brain and Hatschek’s pit mediation by GnRHR, and for the understanding of the mechanism of action on the reproductive endocrine control axis among brain-Hatschek’s pit-gonads.     

The antipole evolution effect of immature-low mature organic matter

The low-temperature and low-pressure artificial hydropyrolysis experiment proves that at the immature-low mature thermal evolution stage of source rock, the condensation reaction and the thermal degradation reaction occur continuously and simultaneously in both soluble organic matter and insoluble organic matter. This process was called “antipole evolution”, which means transformation into two opposing extremes. The soluble organic matter and insoluble organic matter constitute an organic related integrity, transforming mutually in a dynamic equilibrium. Non-hydrocarbon and asphaltene are key intermediates between kerogen and hydrocarbon. Asphaltene is one of the major sources of immature hydrocarbons.