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基于质量功能分配的大型水轮机叶片铸件制造工艺研发决策 被引量:2
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作者 盖登宇 李庆芬 +2 位作者 王世滨 陈昭运 谈力 《铸造》 CAS CSCD 北大核心 2008年第7期685-689,共5页
应用质量功能分配(QFD)技术,将大型水轮机转轮叶片铸件制造过程中的铸件形状尺寸、化学成分、力学性能、残余应力、机械加工量、铸件内部和外部无缩孔或缩松、焊补量、零缺陷或少缺陷等质量要求按相关度与各工序建立联系,并利用质量屋... 应用质量功能分配(QFD)技术,将大型水轮机转轮叶片铸件制造过程中的铸件形状尺寸、化学成分、力学性能、残余应力、机械加工量、铸件内部和外部无缩孔或缩松、焊补量、零缺陷或少缺陷等质量要求按相关度与各工序建立联系,并利用质量屋技术对各工序进行质量要素分析,进而将质量屋信息转化为制造工艺设计的技术路线,包括冶炼过程热力学分析及微量元素控制、CAE指导下的木模制造、铸造过程、热处理过程。为大型水轮机叶片铸件提供了制造工艺的研发决策。 展开更多
关键词 叶片铸件 质量功能分配 质量 研发
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Power Consumption Optimization of Downlink Macro-Femto Heterogeneous Networks Based on Cross-Layer Design
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作者 张秀宁 谈振辉 +2 位作者 徐少毅 张金宝 陶成 《China Communications》 SCIE CSCD 2013年第2期42-55,共14页
Based on the cross-layer design, the power-optimization problem of Macro-Femto Heterogeneous Networks (HetNets) has been formulated. The constraints of power and re-source block allocation in the physical layer, del... Based on the cross-layer design, the power-optimization problem of Macro-Femto Heterogeneous Networks (HetNets) has been formulated. The constraints of power and re-source block allocation in the physical layer, delay and target data rate in the medium ac-cess control layer, urgent queue length in the network layer, and packet error rate in the transport layer, have been considered. The original problem is non-deterministic polyno-mial time hard, which cannot be solved practi-cally. After the restrictions of upper layers are translated into constraints with physical layer parameters, and the integer restrictions are relaxed, the original problem can be decom- posed into convex optimization subproblems. The optimal solutions of resource block allo-cation and power allocation can be obtained by using the Lagrangian optimization. Simula-tion results show that the proposed scheme is better than both the round robin algorithm and the max-rain one in terms of energy efficiency, throughput and service fairness. The round robin algorithm and the max-min one only focus on the user fairness rather than quality of service fairness. Compared to the round robin scheme (the max-min one), the proposed scheme improves the energy efficiency 58.85% (62.41%), the throughput 19.09% (25.25%), the service fairness 57.69% (35.48%). 展开更多
关键词 cross-layer design Macro-FemtoHetNets MIMO-OFDM energy efficiency
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Effects of the Ganning Formula (肝宁方) on Liver Fibrosis in Patients With Chronic Hepatitis B 被引量:11
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作者 邓鑫 梁健 +2 位作者 吴发胜 李艳波 唐艳芳 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2011年第4期282-287,共6页
Objective: To investigate the clinical efficacy and safety of the Ganning formula (肝宁方) for the treatment of liver fibrosis in patients with chronic hepatitis B. Methods: In a multicenter, randomized, controlled cl... Objective: To investigate the clinical efficacy and safety of the Ganning formula (肝宁方) for the treatment of liver fibrosis in patients with chronic hepatitis B. Methods: In a multicenter, randomized, controlled clinical trial, 150 patients with liver fibrosis secondary to hepatitis B virus (HBV) infection were randomly assigned in equal numbers to receive either the Ganning formula (a Chinese herbal decoction; active treatment group) or oral entecavir (control group) for two 3-month courses. Patients were monitored for any treatment-induced changes in liver function test parameters (ALT, AST, and GGT), liver fibrosis markers (LN, HA, IV-C, and PCIII), HBV DNA level, hepatosplenic imaging, quality of life scores, or psychological and social functioning scores. Patients were also observed for any adverse effects. Results: After treatment, patients in both groups experienced significant improvements in liver function, HBV DNA load, hepatosplenic B-mode ultrasonography, quality of life, and psychological and social functioning (P<0.05 or P<0.01). Patients receiving the Ganning formula achieved greater improvements in HA, IV-C, quality of life, and psychological and social functioning compared with those on entecavir (P<0.05 or P<0.01). There were no abnormal changes in blood tests, urine, feces, renal function, or electrocardiogram. Additionally, no adverse effects were observed in any patients in either group. Conclusions: The Ganning formula appears to have the potential to inhibit liver fibrosis and therefore improve liver function by inhibiting HBV replication in patients with chronic hepatitis B. Additionally, this formula is helpful in improving quality of life and psychological and social functioning. 展开更多
关键词 Ganning formula hepatitis B liver fibrosis clinical observation
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