ISDN标准接入的多功能数字终端

论述了综合业务数字网（ＩＳＤＮ）及其标准用户──网络接口的基本概念；对用户网络接口的体系结构作了较为详细的说明，给出了具体的软件实现方法和硬件接口电路（ＳＮＩＣ）．在此基础上，提出了ＩＳＤＮ标准数字话音终端和基于基本接入能力（２Ｂ＋Ｄ）的多功能数字终端的设计方案。     

Blue emission from hydrogen-containing a-Si：H／SiO2 multilayers and the investigation of its mechanism

A series of hydrogen-containing a-Si:H/SiO2 multilayers with different a-Si:H sublayer thickness were fabricated by layer-by-layer deposition and in situ plasma oxidation in a plasma-enhanced chemical vapor deposition system (PECVD). Optical induced blue emission from the samples was observed by the naked eye at room temperature, which has never been reported in the luminescence study of Si/SiO2 multilayers up to now. Both the photoluminescence (PL) peak and the absorption edge show a blue shift as the a-Si:H sublayer thickness decreases. The origin of the blue emission and the effect of hydrogen are discussed.     

通海海菜花的核型研究

首次报道产于我国云南省的通海海菜花 (Otteliaacuminatavar.tonhaiensish .Li)的体细胞染色体数目和核型 ( 2n =2x =2 2 =1 8m 2sm 2st) .属“2B”型 ,与海菜花属 (Ottelia)的核型非常相近 ,这为进一步研究水鳖科海菜花属的系统演化提供了重要的细胞学资料     

硫酸盐法间歇蒸煮过程的建模

本文从硫酸盐法间歇蒸煮脱木动力学出发,推导出其蒸煮过程纸浆Ｋａｐｐａ值数学模型为：Ｋａ＝Ａ－Ｂｌｎ／（Ｈ－Ｈｂ）「ｌｎ（Ｓ）ＥＡｂ」＾Ｒ」,用实验和工厂的数据对模型的验证结果表明,该模型具有很好的拟合精度,其相关系数γ大于０．９３４。     

[CrMo_6O_(24)H_6]~(3-)掺杂聚苯胺材料的制备及荧光性质

在盐酸介质中,以(NH4)2S2O8为氧化剂,杂多阴离子[CrMo6O24H6]3-为掺杂剂合成出了聚苯胺掺杂材料,用FT-IR,XRD进行了表征,测定了该材料的电导率、常见溶剂中的溶解度及其荧光性质.该材料的电导率为1.4×10-2S·cm-1,最高溶解度可达到0.60mg·mL-1,在以260nm和332nm为激发波长,可分别在425nm和567nm处得到荧光发射峰。     

一种穿越NAT/FW的有效方案——基于H.323集中式视频会议系统

以H.323建议的集中式视频会议系统为平台,论述了NAT/FW障碍的形成和穿越NAT/FW的原理,提出了一种穿越NAT/FW的方案,给出了软件实现的部分代码.实际运行表明,该方案是一种行之有效的软件方案,应用该方案可使H.323集中式视频会议系统有效穿越NAT/FW障碍.     

H.264帧内预测快速算法

帧内预测是H.264视频编解码标准中一项重要的技术,极大地提高了H.264的编码效率。然而,帧内预测的亮度块有13种预测模式。为选出最佳模式,全搜索算法需要花费极大的计算量。为了降低帧内预测的复杂度,提出了一种基于变换域的快速帧内预测算法。实验结果表明:与全搜索相比,改进的算法在保持PSNR基本不变和码率增加很小的情况下,使帧内预测编码的速度提高70%左右。     

Discussion of gas enrichment mechanism and natural gas origin in marine sedimentary basin,China

There are abundant natural gas resources in Chinese marine sedimentary basin. The exploration hot shots of natural gas are the Palaeozoic marine strata here in recent years, and several large scale gas fields have been discovered. Chinese Palaeozoic high-post matured and coal measure hydrocarbon source rocks are mainly prone to gas generation in the present. This research considered that gas source rocks and TSR are the key cause of gas enrichment of marine strata. High-quality argillaceous and coal measure hydrocarbon rocks are distributed widely in the Palaeozoic marine strata, which have been in highly matured phase in the present. The argillaceous source rock generally contains various sulfates that could accelerate crude oil cracking to gas for TSR occurrence, and coal measure source rock mainly generates gas, so Chinese marine basin gives priority to accumulating gas. Marine strata have not founded oil reservoirs in the Sichuan Basin and Ordos Basin, and they consist mainly of dry gas. Marine natural gases are the mixed gases of oil cracking gas and coal-formed gas in a general way, oil cracking gases contain usually some H2S and CO2. Hydrocarbon carbon isotopes are very complicated, and methane and ethane isotopic values bear apparent reversal caused by thermal evolution and mixing among different genetic types of natural gas. Coal-formed gases are the main component of Chinese marine natural gas. The Upper Permian of the Sichuan Basin and the Carboniferous-Permian of the Ordos Basin coal measure hydrocarbon source rock present large hydrocarbon generation potential, which are the prospecting highlight of marine natural gas hereafter. Oil cracking gas exploration will be paid much attention to in the Tarim Basin because of the lack of coal measure hydrocarbon source rock.     

The controlling factors and distribution prediction of H_2S formation in marine carbonate gas reservoir,China

Generally, there are some anhydrites in carbonate reservoir, as H2S is also familiar in carbonate oil and gas reservoirs. Nowadays, natural gas with high H2S concentration is usually considered as TSR origin, so there is close relationship between H2S and anhydrite. On the contrary, some carbonate rocks with anhydrite do not contain H2S. Recently, researches show that H2S is only a necessary condition of H2S formation. The reservoir porosity, sulfate ion content within formation water, reservoir temperature, oil/gas and water interface, hydrocarbon and some elements of reservoir rock have great controlling effects on the TSR occurrence. TSR deoxidizes hydrocarbon into the acidic gas such as H2S and CO2, and the H2S formation is controlled by TSR occurrence, so the relationship among reaction room, the contact chance of sulfate ion and hydrocarbon, the reservoir temperature has great influence on the TSR reaction. H2S has relatively active chemical quality, so it is still controlled by the content of heavy metal ion. Good conditions of TSR reaction and H2S preservation are the prerequisite of H2S distribution prediction. This paper builds a predictive model based on the characteristic of natural gas reservoir with high H2S-bearing. In the porosity reservoir with anhydrite, the formation water is rich in sulfate and poor in heavy metal ion. Oil and gas fill and accumulate in the gas reservoir with good preservation conditions, and they suffered high temperature later, which indicates the profitable area of natural gas with high H2S-bearing.     

纳米四水羟基硝酸氧铋的制备及在氮气气氛下的热分解动力学

利用反相微乳液法制备出了纳米四水羟基硝酸氧铋[Bi6O4(OH)4](NO3)6(H2O)4,并以热分析为手段对纳米[Bi6O4(OH)4](NO3)6(H 2O)4的热分解过程和非等温热分解动力学机理进行了研究.动力学研究确定了[Bi6O4(OH)4](NO3)6(H2O)4脱硝酸根反应属于球对称的三维扩散的D3机理,热分解表观活化能为E=98.90033 kJ/mol,lnA=27.13109.