BPEL中基于有限状态自动机的Web服务自动组合

提出了一种基于有限状态自动机的Web服务自动组合方法,该方法能够自动实现BPEL中抽象业务流程与Web服务的绑定.以有限状态自动机模型形式化地定义了业务流程的外模式和内模式,将Web服务组合问题转化为有限状态自动机问题.利用有限状态自动机的笛卡儿积运算,得出了服务组合系统的行为描述.在此基础上,提出了组合服务存在性的判定依据,进一步给出了组合服务的计算方法,设计并实现了一个演示系统.     

IP over WDM网络中一种新型虚拓扑构造算法

对IP over WDM的虚拓扑设计算法进行了研究，选择网络整体流量的均衡性作为优化目标，提出了一种新型的虚拓扑构造算法。在算法中，选择负载分布方差作为评价流量均衡性的指标，并给出其定义和计算方法。主要针对拥塞概率性能，在光层和IP层将提出的新型虚拓扑构造算法与其他算法进行比较。在光层的算法比较部分，选择负载均衡启发式路由算法（RLBH，routing with load balancing heuristics）与提出的算法进行比较；在IP层的算法比较部分，选择固定路径最小拥塞路由算法（FPLC，fixed-path least-congestion）与提出的算法进行比较，并对比较结果进行了讨论。比较结果显示在拥塞概率性能方面，提出的新型虚拓扑构造算法优于RLBH算法和FPLC算法。     

用于配电网开关优化配置问题的二进制PSO算法

提出了1种求解配电网开关优化配置问题的二进制粒子群(PSO)算法。该算法通过对开关设备总投资、年运行费用和年停电损失费用等优化计算,以达到综合年费最少的角度,确定了1种开关配置方案。仿真计算表明,二进制PSO算法相对于遗传算法和免疫算法等搜索方法而言,具有更好的全局收敛性,且算法简单,是求解配电网开关优化配置问题一种有效方法。     

有源阵列天线的发展及应用

介绍了有源阵列天线的发展概况、组成结构及技术特点,并对比其与无源阵列天线的优缺点,讨论了有源阵列天线的应用及发展前景。     

Remote sensing applications in the Australian Bureau of Meteorology

Abstract

The space age for the Bureau of Meteorology arrived in December 1963 with the first direct receipt in Australia of visual images of clouds from the US TIROS-8 satellite. Since that time, the successful application of advances in satellite data, products and services has brought dramatic improvements to most aspects of the Bureau's operations and research. This paper documents the developments of the past 25 years by describing the Bureau's current national infrastructure for the reception, processing and dissemination of meteorological satellite data and the way in which satellite data and systems are used to improve the Bureau's services. The meteorological satellite has emerged not only as a highly cost-effective primary observation platform, providing an increasingly diverse range of meteorological data, but also as a vital communications medium for both general meteorological information and the interrogation of complementary observational systems. The prospects for further major advances in the application of satellite information within the Bureau are very high. During the early 1990s and beyond, the next generation of active remote sensing technology will replace the current passive sensor technology deployed in the international meteorological satellite network. As a result, further improvement in the ability of the Australian meteorological community to describe quantitatively the dynamic and thermodynamic structure of the atmospheric and marine environment is confidently predicted.     

ITS中基于模糊关系数据模型的知识表示及推理研究

使用模糊关系模型讨论建立学科知识库的方法,并用隶属度函数及模糊中心数等方法描述知识点属性,以知识点的模糊关系建立知识库,并且,就实现基于模糊关系数据模型推理过程,给出了两个关键性的算法。     

Role of the peripheral renin profile in predicting blood pressure control after bilateral nephrectomy in renal-transplanted patients

BACKGROUND: The unregulated renin release by native kidneys is one of the factors responsible for the high incidence of hypertension after renal transplantation but, even after three decades of transplantation, there is still a lack of a method to identify it as the major cause of hypertension. METHODS: We investigated whether or not peripheral renin activity, before and 90 min after 25 mg of captopril, can play this role. One hundred and five consecutive patients with SCr less than 2 mg/dl were studied 18 +/- 8 months after renal transplantation. Forty-seven of them were considered hypertensive and 58 normotensive. All hypertensive patients were submitted to the captopril test to analyse the peripheral renin activity profile. RESULTS: In the hypertensive group, 17 patients (36%) were considered Renin-pos and 30 (64%) Renin-neg. All Renin-pos (stimulated renin = 19.1 +/- 6.4 ng/ml/h) patients were submitted to bilateral nephrectomy (bNx) and re-evaluated 6 months later. All of them normalized renin activity (4.4 +/- 3.0 ng/ml/h, P = 0.0001) and 10 of 17 (60%) became normotensive and off drugs. The remaining seven (40%) decreased the number of hypotensive drugs from 2.2 +/- 0.5 to 0.5 +/- 0.7/pt/day. There was a correlation between b-Renin and dBP (r = 0.47, P < 0.05) which was lost after bNx. An 'in situ' renal-cell carcinoma was found in two cases. Serum creatinine did not change. CONCLUSIONS: This study shows that the unregulated renin-angiotensin system from the native kidneys plays a major role in the maintenance of hypertension in some patients with normal graft function and that peripheral renin activity can identify those who will benefit from bilateral nephrectomy.     

太湖水体悬浮颗粒物生物光学模型及MERIS数据反演

根据太湖悬浮颗粒物生物光学特性建立的悬浮颗粒物红外单波段生物光学模型具有明确的机理性.利用2006年至2009年野外实测悬浮颗粒物浓度和水体光学数据对该生物光学模型进行检验和分析.结果表明,悬浮颗粒物比后向散射系数的时空差异是影响总悬浮颗粒物生物光学模型精度的主要因素.总悬浮颗粒物在红外波长的吸收系数对总悬浮颗粒物生物光学模型精度也具有显著的影响.根据中分辨率光谱成像仪(MERIS)悬浮颗粒物 反演结果和野外实测风速数据,太湖沉积物再悬浮将显著增加水体中悬浮颗粒物的含量.     

1-(5-乙基-1,3,4-噻二唑基)-3-苯基硫脲的合成及生物活性

研究了 1 - ( 5 -乙基 - 1 ,3,4-噻二唑基 ) - 3-苯基硫脲的合成及抗菌活性。以 5 -乙基 - 2 -氨基 - 1 ,3,4-噻二唑和异硫氰酸苯酯为原料 ,在十六烷基三甲基溴化铵催化下 ,合成 1 - ( 5 -乙基 - 1 ,3,4-噻二唑基 ) - 3-苯基硫脲 ,找到了较好的合成工艺条件 ,结果表明 :5 -乙基 - 2 -氨基 - 1 ,3,4-噻二唑和异硫氰酸苯酯的摩尔比为 1∶ 1 .8,乙腈为溶剂 ,水浴加热回流 4.0 h,十六烷基三甲基溴化铵为 2 g,1 - ( 5 -乙基 - 1 ,3,4-噻二唑基 ) - 3-苯基硫脲的产率为 5 9.76%。同时发现 1 - ( 5 -乙基 - 1 ,3,4-噻二唑基 ) - 3-苯基硫脲有较强的抗菌活性     

负载活性组分的核壳结构纤维膜的制备及性能

采用同轴静电纺丝技术将蛛丝蛋白（Ss）和美洲大蠊提取物（PAE）分别负载于纳米纤维的壳层与核层。随着Ss的增加,纤维直径从350 nm降至280 nm,核层直径由120nm升至140 nm,壳层厚度由115 nm降至70 nm。Ss的加入使纳米纤维膜具有良好的机械性能和亲水性,纳米纤维膜的拉伸强度可达到4.31 MPa,溶胀率可达到150%,水蒸气透过率可达到1834 g/(m2?24h),水接触角减小到 32.7 ?。纳米纤维膜核壳结构能够有效抑制药物突释,实现药物长效释放,7天内药物释放可达77%;纳米纤维膜能够有效抑制细菌生长,促进细胞增殖,相较于未负载Ss的纳米纤维膜,负载20%Ss的纤维膜的细胞增殖效果提高25%,说明Ss和PAE在伤口愈合过程中能够起到协同作用。