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Search Results: 1 - 10 of 22563 matches for " 代莉 "
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梁启超《欧游心影录》文化价值论

湖南工业大学学报(社会科学版) , 2009,
Abstract: 1919年写成的《欧游心影录》在梁启超的文化思想中具有重要地位和意义 ,它是梁启超晚年文化观改弦易辙的预告 :一方面对西方物质和科技文明进行了前所未有的批判 ,与 1919年以前梁启超对待西方文化的立场和态度有了一个很大的反差 ;另一方面对中国传统文化又表现出了前所未有的自信和推崇。在此基础上 ,他提出了中国未来文化建设的基本主张 :偏于 “荷兰、瑞士、中学 ”的调和主义路线。这既体现了梁启超思想中理性的和辩证的一面 意大利、国,从而转为提倡君主立宪制。这种观念转变的直接结果是对“革命”,又不免具有幻想的色彩。
大口径宽带数字延时相控阵天线
The large aperture wideband phased array antenna

,曾浩
- , 2017, DOI: 10.11835/j.issn.1000-582X.2017.07.010
Abstract: 不同于窄带相控阵天线,空间色散和时间色散是大口径宽带相控阵天线需要解决的2个主要问题。文章采用了子阵加数字延时滤波器的整体结构设计,把大口径阵列划分为很多个较小口径的子阵,并采用传统窄带相控阵天线加权方法,完成子阵的波束合成;子阵间的波束合成,则采用数字延时滤波器实现。在介绍了子阵划分方式的基础上,对延时滤波器的时域设计方法进行了阐述和分析。通过延时滤波器仿真,证明了滤波器设计方法的正确性;通过系统方向图仿真,证明了子阵加数字延时滤波器的设计方法,克服了空间色散和时间色散问题。
In contrast to narrow band phased array antenna, spatial dispersion and time dispersion are two dominant issues faced by the large aperture wideband phased array antennas. In this paper, the integral structure design of the subarray and digital delay filter was adopted. Firstly, the large aperture array was divided into a number of smaller size subarrays, and each of them was considered as a traditional narrow band phased array. Then, the beam forming between the subarrays was realized through digital time delay filter. After subarray partition, delay filter design in time domain was described and analyzed. Simulation results of time delay filter validate the correctness of the proposed filter design. Furthermore, system simulations prove that the hybrid structure with subarray and delay filter is able to overcome the spatial dispersion and time dispersion problems
基于背包策略的WPT系统多拾取输出控制方法
Output Optimization Control Strategy for Wireless Power Transfer System with Multiple Pickups Using Knapsack Algorithm

,戴欣
- , 2018, DOI: 10.3969/j.issn.1001-0548.2018.04.009
Abstract: 无线电能传输(WPT)是一种借助于高频电磁场实现电能以无线形式传输的新兴技术。在多拾取无线电能传输系统中,由于各个拾取系统的输出能力不均衡,导致系统综合协调控制相对困难。针对无线电能传输系统多拾取系统的输出稳压控制,该文提出了一种基于背包优化算法的输出稳压控制方法。分析了多拾取电路的工作原理,建立系统的输出交流阻抗模型,推导出输出电压与多拾取端稳压控制器占空比关系,提出了一种基于背包优化算法进行输出电压稳压控制的策略。实验结果表明,通过该优化控制算法,能实现多拾取WPT系统现输出电压的快速调节与稳压控制。
益生菌治疗在溃疡性结肠炎中的临床应用
张淑平,,加平
华西医学 , 2010,
Abstract: 【】目的探讨益生菌治疗在溃疡性结肠炎(ulcerativecolitis,UC)患者中的临床应用效果。方法选取2007年8月-2009年12月47例活动期UC患者,随机分为治疗组和对照组,分别给予益生菌和5-氨基水杨酸治疗,疗程8周。监测治疗期间患者的临床症状和血清C反应蛋白(Creactiveprotein,CRP)水平。结果治疗结束后两组患者临床症状均有缓解,CRP水平均明显下降,两组间无统计学意义(P>0.05)。结论益生菌治疗UC可有效改善患者临床症状和炎症反应。
p38 MAPK通路的活性调控及其在类风湿性关节炎中的作用
The p38 Mitogen-Activated Protein Kinase Pathway in Rheumatoid Arthritis
 [PDF]

陈缙筠, 吴虹, 李辉, 苗苗, 胡顺, 陈建
Pharmacy Information (PI) , 2014, DOI: 10.12677/PI.2014.31003
Abstract:
类风湿性关节炎过程涉及多细胞间的信号网络持续的调控。该网络包括胞外介质如细胞因子、趋化因子和基质金属蛋白酶,其协调各细胞参与慢性炎症过程。相对应的是胞内转录因子通路,其主要将炎症刺激信息传递给细胞核。丝裂原活化蛋白激酶(MAPKs)信号通路中p38 MAPK信号通路对慢性炎症的诱导及维持起至关重要的作用,因此针对该通路上的分子靶点研制出相应的小分子抑制剂用于控制炎症发展。本文通过总结p38 MAPK通路的多种功能作用和活性调节,对其在类风湿性关节炎中的作用做简要综述。
Rheumatoid arthritis processes are based on a sustained regulated communication network among different cells types. This network comprises extracellular mediators such as cytokines, chemokines and matrix degrading proteases, which orchestrate the participation of cells in the chronic inflammatory process. Intracellular transcription factor pathways are corresponding with this outside communication world, which transfer information about inflammatory stimuli to the cell nucleus. This review examines the function of one key signal transduction pathway of inflammationthe p38 mitogen-activated protein kinases (p38 MAPK). The p38 MAPK signalling pathway is considered crucial for the induction and maintenance of chronic inflammation, and thus its components emerge as interesting molecular targets of small molecule inhibitors for controlling inflammation. This review not only summarizes the current knowledge of activation, regulation and function of the p38 MAPK pathway but also examines the role of this pathway in rheumatoid arthritis.
Logistic映射控制的安全算术编码及其在图像加密中的应用
,包万宇
重庆大学学报 , 2012, DOI: 10.11835/j.issn.1000-582X.2012.08.015
Abstract: 提出了一种通过Logistic映射改变模型中符号的顺序及符号的概率值的安全算术编码,将其应用于图像数据的压缩加密中,使其在网络中安全传输更方便,在编码过程中通过完全混沌的序列保证改变模型的均匀性,从而满足图像压缩编码的安全性要求。算法能够应用于任何针对多媒体数据的算术编码器(包括视频,图像,音频等),并且对编码的效率影响甚微,而且基于编码压缩的加密方式相对于其他同类加密方式所具有的明显优势在于,压缩过程大量减少了信息的冗余性,并在此过程中引入加密,这对试图推测出图像信息以及找到密钥的攻击具有良好的鲁棒性。
图书馆自习室管理系统的设计与实现*
孙发,,曾为众
现代图书情报技术 , 2010,
Abstract: ?总结温州医学院图书馆自习室管理系统的设计、开发和测试工作。该系统基于b/s结构,利用现有校园一卡通系统,通过flash、asp和数据库等软件技术,实现自动分发座位、选择交换座位、座位保留超时管理和图形动画显示座位位置及状态等功能,解决高校图书馆自习室普遍出现的由于抢座、占座而导致的座位利用率低等问题。
随机区间置换的安全算术编码及应用
Image encryption based on key-controlled interval exchanging arithmetic coding

,官昱旻
- , 2015, DOI: 10.11835/j.issn.1000-582X.2015.06.022
Abstract: 基于压缩编码的加密方式能够同时完成加密和压缩的功能,通过压缩减少了信息的冗余,同时引入加密使对试图推测出明文信息和找到密钥的攻击具有非常好的鲁棒性。提出了一种基于随机区间置换的安全算术编码,在编码过程中通过随机密钥保证图像压缩编码的安全性,且不影响编码的效率,使其方便在网络中安全传输。实验结果和安全性分析表明该安全算术编码有较好的安全性和加密效率。
Encryption based on compression can provide compression and encryption in a single step, in which redundancy is removed by compression and security is guaranteed by encryption. A novel secure arithmetic coding scheme based on interval exchanging is proposed in this paper, and it is applied to image encryption. It's found images can be transmitted securely on the Internet and the proposed algorithm dose not bring extra expense in terms of coding efficiency. Experimental results and security analyses indicate that the algorithm has good security strength as well as high encryption efficiency
Dynamic changes of forest landscape pattern in Lushuihe Forest Bureau of Changbai Mountains, Northeast China.
长白山露水河林业局森林景观格局动态

赵福强,力民,于大炮,
应用生态学报 , 2010,
Abstract: Based on the forest management inventories in Lushihe Forest Bureau of Changbai Mountains in 1987, 1995 and 2003, and by using ArcGIS and Fragstats spatial analysis software, this paper analyzed the relationships between landscape pattern change and forest management mechanism in the study area at landscape and patch scales. During the study period, the landscape fragmentation degree and heterogeneity in the study area increased. From 1987 to 2003, the patch number increased by 979, while the proportion of the largest patch area decreased from 28.7% to 12.7%. With the change of management strategy, the landscape matrix changed from mixed broadleaved forest matrix in 1987 to compound matrix in 1995. The extent of landscape fragmentation in 1995-2003 was somewhat reduced, compared with that in 1987-1995. During the study period, the mean patch area and edge density of broadleaved mixed forest decreased most, suggesting that natural secondary forest suffered most from human disturbances.
ADSORPTION BEHAVIORS FOR NITROGEN BY COAL,ITS EXTRACT FRACTIONS AND RESIDUES
煤及其溶剂萃取产物的氮气吸附行为

王 飞,,李小鹏,杨明
燃料化学学报 , 2003,
Abstract: 用二硫化碳—N—甲基—2—吡咯烷酮(CS2—NMP)(1:1,V/V)混合溶剂,以及丙酮和吡啶将云南褐煤和南桐烟煤逐级萃取,去除萃取溶剂后得到各级固态级分。通过ASAP2010型比表面积及孔快速测试仪,对原煤及萃取级分的氮气吸附行为进行测试,分别用BET模型、线型方程对实验结果进行拟合。结果表明对于萃取率较高的煤,溶剂萃取能较大地增加其孔隙率;煤对氮气的吸附行为遵从Henry定律,因此只需在氮气饱和气压的沸点(77K)下,测出少数几个压力点的吸附量,就可以得到一条准确的等温吸附线。
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