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“事企融合”与“事企分开”  [PDF]
张光阳
科技进步与对策 , 1998,
Abstract: 通过对湖北省农业科学院畜牧所和果茶所“事企融合”和“事企分开”改革的内容、特点及效果进行比较分析,指出存在观念滞后、改革不配套等问题,提出了要从解放思想、更新概念;优化外部环境;培植有科研优势的支柱产业;与社会资金开放式重组等方面深化改革,以增强农业科研单位综合实力,提高自我发展能力。农业科研改革农业科学研究所体制改革
Adaptive robust control based on immune optimization and LS-SVRM for nonlinear systems
结合免疫优化和LS-SVRM观测器的非线性系统自适应鲁棒控制

YANG Hong,LUO Fei,XU Yu-ge,YE Hong-tao,
杨红
,罗飞,许玉格,叶洪涛

控制理论与应用 , 2010,
Abstract: An adaptive robust control algorithm is proposed for a class of SISO uncertain nonlinear control systems. Because the problem of the least squares support vector regression machines(LS-SVRM) is transformed to a quadratic programming problem with linear constraints and the ultimate solution is not a local minimum, the system state vector can be estimated by using an observer based on LS-SVRM, when the system state vector is not completely available. Meanwhile, both the norm of the difference between the optimal approximation parameter vector and the nominal parameter vector, and the bounds of the approximation errors are unknown hypothetically; therefore, we can improve the robustness of the systems by adjusting the estimations of the unknown bounds in the algorithm. Considering the effect of parameters of LS-SVRM upon the performance, we present a new immune algorithm for optimizing the parameters of LS-SVRM to improve the approximation ability of LS-SVRM. The theoretical analysis and a simulation example demonstrate the feasibility and validity of the proposed approach.
Performance of PSA and of PSA density in the diagnosis of prostate carcinoma
Martins, Antonio Carlos Pereira;Borelli- Bovo, Tiago J.;Reis, Rodolfo Borges dos;Paschoalin, Edson Luiz;Cologna, Adauto José;Suaid, Haylton Jorge;
Acta Cirurgica Brasileira , 2002, DOI: 10.1590/S0102-86502002000900002
Abstract: objective: the aim of the study was to investigate the influence of the prostate volume and psa density on the performance of total psa to diagnosis of prostate carcinoma. methods: we analyzed 217 patients (psa 0-10ng/ml) submitted to transrectal sextant prostate biopsy. criteria for biopsy indication was psa >2ng/ml and/or digital rectal exam suspicious of prostate cancer. results: fifty five patients had prostate neoplasia (25.3%) and in 8/55 (25.3%) the serum psa was under 4ng/ml. the sensitivity and specificity of the test were respectively 98.2% / 16.6% at a cut-off point of 2.5ng/ml and 85.4% / 38.8% at cut-off of 4ng/ml. the corresponding values for prostates >40ml or <40ml were: 96.2% / 8.1% and 100% / 27.2% at the cut-off point of 2.5ng/ml, and 92.5% / 20% and 78.5% / 62.3% at a cut-off level of 4ng/ml. for prostates <40ml a psa cut-off point of 4ng/ml leads to a misdiagnosis in 21.4% of the malignant tumors. the median psad of benign prostates are different according to prostate volume (.40ml or <40ml). psad at cut-off of 0.08 increases the psa specificity at both psa cut-off points. conclusions: prostate volume affects the sensitivity and specificity of psa and the median values of psad. psad of 0.08 increases the psa specificity specially at a cut-off point of 2.5ng/ml in prostates smaller than 40ml.
Performance of PSA and of PSA density in the diagnosis of prostate carcinoma  [cached]
Martins Antonio Carlos Pereira,Borelli- Bovo Tiago J.,Reis Rodolfo Borges dos,Paschoalin Edson Luiz
Acta Cirurgica Brasileira , 2002,
Abstract: OBJECTIVE: The aim of the study was to investigate the influence of the prostate volume and PSA density on the performance of total PSA to diagnosis of prostate carcinoma. METHODS: We analyzed 217 patients (PSA 0-10ng/ml) submitted to transrectal sextant prostate biopsy. Criteria for biopsy indication was PSA >2ng/ml and/or digital rectal exam suspicious of prostate cancer. RESULTS: Fifty five patients had prostate neoplasia (25.3%) and in 8/55 (25.3%) the serum PSA was under 4ng/ml. The sensitivity and specificity of the test were respectively 98.2% / 16.6% at a cut-off point of 2.5ng/ml and 85.4% / 38.8% at cut-off of 4ng/ml. The corresponding values for prostates >40ml or <40ml were: 96.2% / 8.1% and 100% / 27.2% at the cut-off point of 2.5ng/ml, and 92.5% / 20% and 78.5% / 62.3% at a cut-off level of 4ng/ml. For prostates <40ml a PSA cut-off point of 4ng/ml leads to a misdiagnosis in 21.4% of the malignant tumors. The median PSAD of benign prostates are different according to prostate volume (.40ml or <40ml). PSAD at cut-off of 0.08 increases the PSA specificity at both PSA cut-off points. CONCLUSIONS: Prostate volume affects the sensitivity and specificity of PSA and the median values of PSAD. PSAD of 0.08 increases the PSA specificity specially at a cut-off point of 2.5ng/ml in prostates smaller than 40ml.
结合免疫优化和LS-SVRM观测器的非线性系统自适应鲁棒控制  [PDF]
杨红,罗飞,许玉格,叶洪涛
控制理论与应用 , 2010, DOI: 10.7641/j.issn.1000-8152.2010.5.CCTA090390
Abstract: 针对一类单输入单输出不确定非线性控制系统提出了一种自适应鲁棒控制算法.由于最小均方支持向量回归机(LS-SVRM)的最终解可以化为一个具有线性约束的二次规划问题,不存在局部极小,所以该算法在不要求假设系统的状态向量是可测的条件下通过设计基于LS-SVRM的观测器来估计系统的状态向量;同时在算法中假设LS-SVRM的最优逼近参数向量和标称参数向量之差的范数和逼近误差的界限是未知的,因此可通过对未知界限估计的调节来提高系统的鲁棒性.考虑到LS-SVRM本身参数对LS-SVRM性能的影响,本文应用一种新的免疫优化算法对LS-SVRM的参数进行优化,从而提高LS-SVRM的逼近能力.理论研究和仿真例子证实了所提方法的可行性和有效性.
SVRM辅助的北斗GEO卫星反射信号土壤湿度反演方法
SVRM-assisted soil moisture retrieval method using reflected signal from BeiDou GEO satellites
 [PDF]

杨磊,吴秋兰,张波,梁勇,洪学宝,邹文博
- , 2016, DOI: 10.13700/j.bh.1001-5965.2015.0656
Abstract: 摘要 提出了一种支持向量回归机(SVRM)辅助的北斗地球静止轨道(GEO)卫星反射信号土壤湿度反演方法。使用全球导航卫星系统反射信号(GNSS-R)右旋圆极化(RHCP)天线和左旋圆极化(LHCP)天线接收体制进行了地基实验,采集了北斗GEO卫星直射、反射信号原始数据,并从中提取直射、反射信号的相关功率,结合北斗GEO卫星的高度角与方位角信息作为输入,烘干称重法获取的土壤湿度作为输出对使用径向基(RBF)核函数的ε-SVRM进行了训练。独立测试集上的结果表明,SVRM辅助的北斗GEO卫星反射信号土壤湿度反演方法获取的土壤湿度结果与烘干称重法获取的土壤湿度参考值误差控制在3%以内,线性回归方程决定系数为0.897 9,均方根误差RMSE为1.492 6%,证明了该方法具有良好的泛化特性,实际应用中效果良好。
Abstract:We propose a support vector regression machine (SVRM)-assisted soil moisture retrieval method using the reflected signal from BeiDou geosynchronous orbit (GEO) satellites. This method uses a right hand circular polarization (RHCP) antenna and a left hand circular polarization (LHCP) antenna to gain the direct and reflected signal's power data from the BeiDou GEO satellites, respectively. Furthermore, it uses the direct and reflected signal power, BeiDou GEO satellites' elevation angle and azimuth angle as the input features and uses the soil moisture data which is obtained by oven-drying method as the output target of the ε-SVRM which uses a radial basis function (RBF) kernel function. The collected data is separated into two sets randomly:one as training set and the other as test set. The test results show that the error between retrieval model's prediction and the value of oven-drying method is less than 3%; the regression coefficient of determination is 0.897 9; the root mean square error (RMSE) is 1.492 6%, which proves that this method has good generalization ability and the practical results meet the application requirement.
服装企业中的商品企画  [PDF]
纺织学报 , 1996,
Abstract: 本文介绍了日本服装企业中高效、规范的企画体系,并具体说明了企画的内容、组织结构、周期等特点。
论校企分开的途径选择  [PDF]
杨竹节
科技进步与对策 , 2002,
Abstract: 高校企业已成为中国高科技产业的重要力量。校企分开虽然困难重重,却是企业发展的必然要求。探讨了校企分开的途径选择。高校校办企业校企分离校企分开
校办产业不能校企不分  [PDF]
杨竹节
科技进步与对策 , 2001,
Abstract: 高等院校所办企业已成为我国科技产业的主力之一。分析了校企不分的弊病及校企分开的难点,认为校企应尽可能分析,目标是校企完全分离,以利于我国产业结构的优化升级,促进新经济的健康成长。“校企不分”产权结构利益机制中国高校校办产业
THE DISCRIMINATIVE ABILITY OF PERCENT FREE PSA IN PATIENTS WITH PSA > 10 NG/ML
B.W. Wadie, E.S.A. Abdelfatah, S.E. Emara, M.A. Bazeed
African Journal of Urology , 2003,
Abstract: Objective To study the discriminative role of % free PSA in patients with a total PSA > 10 ng/ml. Patients and Methods Our patient cohort con-sisted of 90 males aged between 45 and 81 years (mean age: 67 ± 9 years). All patients had a biopsy-proven prostate pathology. Fifty-six patients had BPH (Group I) while 34 had prostate cancer (Group II). Blood samples were collected from all patients, and total PSA, free PSA and % free PSA were calculated in all specimens. Total PSA was measured using the Imx assay (Abbott, USA). The significance of the differences between the groups was assessed by the Mann-Whitney Wilcoxon rank sum test and Spearman's correlation coefficient for the correlation between % free PSA and the pathological diagnosis. Results The difference in total PSA between the two groups was insignificant. The mean value in BPH patients was 11.7 ± 11.4 ng/ml, while in patients with prostate cancer its was 15.8 ± 19.2 (p = 0.8). The mean % free PSA was 18 ± 1% in patients with BPH and 16 ± 0.6% in patients with prostate cancer (p = 0.3). A strong correlation was evident between % free PSA 15% and the pathological diagnosis (p = 0.87). This was also true for the cutoff values of 20% and 25% (p=0.79 and 0.62, respectively). Conclusion As a diagnostic test, % free PSA alone cannot be used for the discrimination of BPH from prostate cancer. In patients with a total PSA > 10 ng/ml, % free PSA has no value in the discrimination between benign and malignant pathology. Les Possibilités Discriminatives de la Fonction Libre de PSA chez les Patients dont le Taux de PSA est > 10mg/ml. Objectifs : Etude du r le discriminatif de la fraction libre de PSA pour les patients dont le taux de PSA est supérieur à 10 mg/ml. Patients et Méthodes : Il s'agit d'une cohorte de 90 patients de sexe masculin agés de 45 à 81 ans avec une moyenne d'age de 67 ± 9 ans. Tous les patients ont subi des biopsies prostatiques avec étude histopathologique : 56 patients présentent une HBP (Groupe I) et 34 patients un cancer de la prostate (Groupe II). Un prélèvement de sang a été réalisé chez tous les patients avec un dosage du PSA total et de la fraction libre de PSA. Le PSA total a été mesuré par un kit IMX ( Abott, USA). L'étude statistique a été réalisée utilisant le Mann-Whitney Wilcoxon Rank test pour l'étude de la significativité de la différence entre les 2 groupes et le coefficient de corrélation de Spearman pour l'étude de la corrélation entre le rapport PSA libre/PSA totale et le diagnostic histologique. Résultats : La différence du PSA total entre les 2 groupes n'est pas significative. La moyenne des chiffres de PSA total dont l'anatomopathologie des biopsies a conclu à un cancer prostatique était de 11,7 ± 11,4 ng/ml alors que la moyenne chez le 2ème groupe présentant un cancer prostatique était de 15,8 ± 19,2 (P=0,8). La moyenne des rapports PSA libre/PSA total était de 18 ± 1% pour les patients présentant une HBP alors qu'elle était de 16 ± 0,6 % pour les patients
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