11 research outputs found

    基于光束偏移器的空间激光通信双折射滤波方法

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    本发明公开了一种基于光束偏移器的空间激光通信双折射滤波方法。该方法利用光束偏移器将光信号分离为偏振方向正交的两束线偏振光,同时利用半波片将其中一束光偏振方向旋转90°,利用延迟器调整另一束光光程,使得两束光偏振方向一致且光程差基本相等;最后同时使两束线偏振光通过双折射滤光器实现光学滤波,分别探测两束光信号并在电域将其相加得到最终的通信信号。本发明在光学滤波过程中不存在偏振消光损耗,并且结构简单,降低了推广难度

    量子密钥传输系统的主动相位补偿

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    The present invention relates to a soil solidifying agent for saline-alkali soil and its preparation method

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    本发明公开了一种盐碱地土壤固化剂及其制备方法,其中,该固化剂包括以下原料:木质素磺酸钠、亚甲基二奈磺酸二钠、石蜡油、浒苔浸提液、甲基甲酰胺、乙二醇、羟丙基淀粉、海藻酸钠、氯化铁、过硫酸钾、正丁醇、硅酸钙和贝类生物质超微粉。本发明首次使用了新型外加剂——滨海地区丰富的土著资源浒苔及贝类生物质,此两种新型外加剂能够有效促进固化剂与土壤之间发生离子交换等化学反应,提高土质膨胀效果,减少固化土的内部空隙,补偿土体收缩,抑制裂开,提升固化土整体的稳定性与密实性,经检测,由本发明提供的固化剂加固的土壤试件的7d浸水和不浸水无侧限抗压强度基本都大于2.0MPa,水稳定系数均大于90%

    全国地层多重划分对比研究-新疆维吾尔自治区岩石地层

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    首次采用地层多重划分理论对比研究方法,提高实用性、科学性;编制新疆岩石地层区划图和地层序列表及横剖面图;建立地层数据库,编拉汉名称对照索引、重点介绍各地层大区典型的动植物化石及编制各地层大区层型剖面分布图。:研究成果是新疆地质生产和科研遵循的岩石地层“法典”,是地矿、石油等部门基础材料,也是教学的参考材料,实用性强,现已为生产、科研教学等广泛引用。近年来在新疆进行地学研究生产的20多家单位都不同程度引用了研究成果

    Aripiprazole versus other atypical antipsychotics for schizophrenia

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    BACKGROUND: In most western industrialised countries, second generation (atypical) antipsychotics are recommended as first line drug treatments for people with schizophrenia. In this review we specifically examine how the efficacy and tolerability of one such agent - aripiprazole - differs from that of other comparable second generation antipsychotics. OBJECTIVES: To evaluate the effects of aripiprazole compared with other atypical antipsychotics for people with schizophrenia and schizophrenia-like psychoses. SEARCH METHODS: We searched the Cochrane Schizophrenia Group Trials Register (November 2011), inspected references of all identified studies for further trials, and contacted relevant pharmaceutical companies, drug approval agencies and authors of trials for additional information. SELECTION CRITERIA: We included all randomised clinical trials (RCTs) comparing aripiprazole (oral) with oral and parenteral forms of amisulpride, clozapine, olanzapine, quetiapine, risperidone, sertindole, ziprasidone or zotepine for people with schizophrenia or schizophrenia-like psychoses. DATA COLLECTION AND ANALYSIS: We extracted data independently. For dichotomous data we calculated risk ratios (RR) and their 95% confidence intervals (CI) on an intention-to-treat basis based on a random-effects model. Where possible, we calculated illustrative comparative risks for primary outcomes. For continuous data, we calculated mean differences (MD), again based on a random-effects model. We assessed risk of bias for each included study. MAIN RESULTS: We included 12 trials involving 6389 patients. Aripiprazole was compared to olanzapine, risperidone and ziprasidone. All trials were sponsored by an interested drug manufacturer. The overall number of participants leaving studies early was 30% to 40%, limiting validity (no differences between groups).When compared with olanzapine no differences were apparent for global state (no clinically important change: n = 703, 1 RCT, RR short-term 1.00 95% CI 0.81 to 1.22; n = 317, 1 RCT, RR medium-term 1.08 95% CI 0.95 to 1.22) but mental state tended to favour olanzapine (n = 1360, 3 RCTs, MD total Positive and Negative Syndrome Scale (PANSS) 4.68 95% CI 2.21 to 7.16). There was no significant difference in extrapyramidal symptoms (n = 529, 2 RCTs, RR 0.99 95% CI 0.62 to 1.59) but fewer in the aripiprazole group had increased cholesterol levels (n = 223, 1 RCT, RR 0.32 95% CI 0.19 to 0.54) or weight gain of 7% or more of total body weight (n = 1095, 3 RCTs, RR 0.39 95% CI 0.28 to 0.54).When compared with risperidone, aripiprazole showed no advantage in terms of global state (n = 384, 2 RCTs, RR no important improvement 1.14 95% CI 0.81 to 1.60) or mental state (n = 372, 2 RCTs, MD total PANSS 1.50 95% CI -2.96 to 5.96).One study compared aripiprazole with ziprasidone (n = 247) and both the groups reported similar change in the global state (n = 247, 1 RCT, MD average change in Clinical Global Impression-Severity (CGI-S) score -0.03 95% CI -0.28 to 0.22) and mental state (n = 247, 1 RCT, MD change PANSS -3.00 95% CI -7.29 to 1.29).When compared with any one of several new generation antipsychotic drugs the aripiprazole group showed improvement in global state in energy (n = 523, 1 RCT, RR 0.69 95% CI 0.56 to 0.84), mood (n = 523, 1 RCT, RR 0.77 95% CI 0.65 to 0.92), negative symptoms (n = 523, 1 RCT, RR 0.82 95% CI 0.68 to 0.99), somnolence (n = 523, 1 RCT, RR 0.80 95% CI 0.69 to 0.93) and weight gain (n = 523, 1 RCT, RR 0.84 95% CI 0.76 to 0.94). Significantly more people given aripiprazole reported symptoms of nausea (n = 2881, 3 RCTs, RR 3.13 95% CI 2.12 to 4.61) but weight gain (7% or more of total body weight) was less common in people allocated aripiprazole (n = 330, 1 RCT, RR 0.35 95% CI 0.19 to 0.64). Aripiprazole may have value in aggression but data are limited. This will be the focus of another review. AUTHORS' CONCLUSIONS: Information on all comparisons are of limited quality, are incomplete and problematic to apply clinically. Aripiprazole is an antipsychotic drug with a variant but not absent adverse effect profile. Long-term data are sparse and there is considerable scope for another update of this review as new data emerges from the many Chinese studies as well as from ongoing larger, independent pragmatic trials

    JUNO Sensitivity on Proton Decay pνˉK+p\to \bar\nu K^+ Searches

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    The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in pνˉK+p\to \bar\nu K^+ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via pνˉK+p\to \bar\nu K^+ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is 9.6×10339.6 \times 10^{33} years, competitive with the current best limits on the proton lifetime in this channel

    JUNO sensitivity on proton decay pνK+p → νK^{+} searches

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