如何用多媒体进行空间解析几何的教学

针对传统的空间解析几何的教学的不足之处，结合自身的教学经验，采用多媒体教学，解决了传统教学的作图难、理解难、想象难、讲解难的问题。     

有关长期股权投资权益法的几个问题

通过对我国长期股权投资中成本法与权益法的比较，探讨了采用权益法的条件、权益法核算方法的处理，提出了复杂权益法及成本与帐面差异的会计核算，成本法与权益法的转换问题。     

水溶性C60赖氨酸衍生物及其铜配合物的合成与表征

合成了水溶性C60赖氨酸衍生物及其铜配合物，通过元素分析、UV、IR、1HNMR、13CNMR对产物进行了表征．     

Recent progress in lanthanide-catalyzed organic reactions in protic media

Lanthanide triflates are stable in water. It is possible for lanthanides to undergo many organic reactions in environmentally friendly solvents. This makes lanthanides very promising in the field of green chemistry. This review describes the recent development of the lanthanidecatalyzed organic reactions in protic solvents. Those reactions include Diels-Alder, Aldol, Allylation, acetalization, pericyclization, radical reactions as well as some newlydeveloped lanthnidesbased catalysts.     

自发性老年肢体坏疽的诊治

目的 探讨自发性老年肢体坏疽的诊断和治疗，方法 15例自发性老年肢体坏疽病人，服药治疗无效后行截肢术。结果 术后4例刀口Ⅰ期愈合，11例出现刀口皮缘坏死，1例冠心病发作，2例出现脑栓塞，2例出现意识障碍。结论 保守治疗多不理想，截肢后易出现合并症，预后差。     

The Study of MSADQ/CDMA Protocol in Voice/Data Integration Packet Networks

A new packet medium access protocol, namely, minislot signalingaccess based on distributed queues(MSADQ/CDMA), is proposed in voice and data intergration CDMA networks. The MSADQ protocol is based on distributed queues and collision resolution algorithm. Through proper management of the PN codes, the number of random competition collision reduces greatly, the multiple access interference (MAI) decreases. It has several special access signaling channels to carry the voice and data access request. Each slot is devided into several control minislots (CMSs), in which the Data Terminals (DT) or Voice Terminals (VT) transmit their request. According to the voice and data traffic character, the signaling access structure is proposed. The code assign rules and queue managing rules are also proposed to ensure the QoS requirement of each traffic. Comparisions with other three protocol are developed by simulation, which shows that MSADQ/CDMA protocol occupies less PN codes, but still has very good performance.     

Synthesis of tetra-O-alkylated calix[4]arenes under phase-transfer conditions

A modified PTC method of preparing tetra-O-alkylated calix[4]arenes is described. Using PEG-400 as phase-transfer catalyst and solid sodium hydrate as a base, full alkylation of calix[4]arenes has been proceeded smoothly in toluene at 90°C. The debutylated calix[4]arene can also be fully alkylated by this method. Supported by the National Natural Science Foundation of China Hu Xubo: born in 1965, Ph. D. Graduate student     

协调对策的有效均衡选择机制——“人质”方法

在经济研究中，协调问题通常被描述为有多个Ｎａｓｈ均衡的非合作对策，其中任一个Ｐａｒｅｔｏ最优策略组合都是一个Ｎａｓｈ均衡。但由于策略的不确定性，往往会产生协调失败。本文为实现Ｐａｒｅｔｏ最优均衡而设计了一种激励机制——提供“人质”。相对于一个局中人的某一行动的人质定义为当他采取该行动时要付给对方的支付数量。为了在Ｎａｓｈ均衡中支持占优，本文证明了人质必须足够大（有下界），以吸引每个局中人合作，同时要足够小（有上界），以防诱使对方不合作，并证明了支持占优的Ｎａｓｈ均衡存在的充要条件是下界值不大于上界值。     

管道中Lamb波两维FFT模式分析

利用两维FFT对管道中传播的Lamb波模式进行了分析。两维FFT系统包括激光探针，数字示波器，移动平台，计算机等。由激光探针实现空间采样，由数字示波器实现时采。借助于本系统，我们从实验上分析了铝管中传播的Lamb波模式。实验结果与理论计算比较可以看出，两维FFT方法可以有效的管道中传播的Lamb波模式进行定量分析。同时可以看出边缘激发的方法可以用于实现单一模式的激发。     

2-羟基-1,4-萘醌在水环境中的迁移特性研究

选择α-萘醌类化合物2-羟基-1,4-萘醌作为研究对象,通过室内动态试验建立起2-羟基-1,4-萘醌在含水层上迁移的数学模型,研究其在含水层介质砂土中的迁移特性.研究结果表明,2-羟基-1,4-萘醌在含水层介质砂土上的吸附平衡时间较短,约为2h,且砂土对其几乎无吸附作用;室内动态试验所建立的数学模型能较好地描述2-羟基-1,4-萘醌在砂土中的迁移作用.