A New Methodological Research on Chaotic Encryption Based Watermarking

本文提出一种基于混沌加密的频率域数字图像水印新算法。将含有版权信息的二值图像作为水印,利用混沌密码对其进行加密。利用人类视觉系统(HVS)的特性,实现了水印在原始宿主图像小波域中的自适应嵌入。实验结果证明了对常见噪音和图像处理算法,该水印具有良好的不可见性和鲁棒性。In this paper,we propose an image digital watermarking algorithm based on chaotic encryption in frequency do-main. A binary image carrying copyright information is used as watermarking and is encrypted by a chaotic sequence cipher before it is embedded. Using characteristics of human visual system (HVS),watermark is embedded into the original image in DWT domain. The experimental results show that the watermarks are invisible and robust against noises and common im-age processing methods

Pressing system with automatic mold transfer function and application method thereof

本发明涉及粉末冶金设备，具体地说是一种具备模具自动传递功能的压制系统及其使用方法，操作台上分别设有操作预处理区域、传递通道、模具取放位置、槽口及启动按钮，传递通道位于操作预处理区域与模具取放位置之间；X轴模组安装于安装支架上，X轴驱动电机安装于X轴模组上，X轴驱动电机驱动X轴模组移动，Z轴模组可相对滑动地连接于X轴模组上，并由槽口内伸出；模具放置在Z轴模组的执行端，通过安装于Z轴模组上的Z轴驱动电机的驱动沿Z轴升降；压机的执行机构包括压头及承载用的压机平台，模具通过模具传递机械手被送至压头与压机平台之间压制。本发明可以自动将模具放置到压机平台上，压制完成后再自动输送回操作区域，避免操作者直接与压机接触，提高生产效率，降低了劳动风险

Negative plate flanging forming automation device

本发明涉及热电池制造领域，特别涉及一种负极片翻边成型自动化设备。包括支撑升降机构、手套箱、自动复位模具、翻边工位、高精度数控转台、预压工位、脱模工位、成型工位及转移及堆码机器人，其中支撑升降机构和高精度数控转台设置在手套箱底部，自动复位模具放置在高精度数控转台的定位座上，定位座上具有0°、90°、180°和270°的放置位置；支撑升降机构设置于自动复位模具的下方；翻边工位、预压工位、脱模工位及转移及堆码机器人均设置在手套箱顶部，翻边工位、预压工位和脱模工位分别放置于高精度数控转台的90°、180°、270°工位的正上方，成型工位固定于高精度数控转台的一侧。本发明通过程序控制可自动的完成负极片翻边成型，提高了热电池制造效率

罗布泊新发现古城与5个考古遗址的年代学初步研究

近百年来,在楼兰考古和古丝绸之路的考察研究过程中,楼兰-鄯善国都城何在?一直是国内外考古、历史、地理等诸多学科关注的热点.通过对罗布泊小河墓地西北约6.3km处新发现的古城遗址以及楼兰(LA)、方城(LE)、且尔乞都克古城、米兰古戍堡、土垠等遗址18个建筑物等样品的C年龄分析,结果表明:小河墓地西北新发现的古城城墙年代大约在公元440～50014年左右,形成于北魏时期(公元386～534年),相对楼兰(LA)佛塔(约公元100～230年)、方城(LE)城墙(约公元230～300年)、且尔乞都克城墙(约公元200年)、土垠(约公元100年)建筑时间年轻约100～300年.米兰遗址古戍堡内房柱年龄约公元370年,古戍堡西门北侧墙基年龄最为年轻(约公元770年),属于唐朝时期.小河墓地西北新发现的古城遗址,根据墙体年代和初步发现的文物类型以及地理位置,有可能是文献中记载的"注宾城",可暂定名为"注宾河古城遗址",该古城遗址的隶属、职能,还有待详细的考古发掘工作.由于该遗址临近丝绸之路古驿站阿拉干,处于丝绸之路东西和南北交通要道的十字路口上,因此无论该遗址是否是"注宾城"、或"埒娄城"、或楼兰国都"扜泥城",它在丝绸之路上的重要位置都是毋庸置疑的.通过对不同古城遗址的年代学分析,为深入研究罗布泊地区古代遗址的时间-空间分布、西域文化的演化过程、人类活动与环境变化关系等提供了新证据

宁夏固原云雾山草原自然保护区生态建设的研究

十年来，根据保护区的特点，已摸索出一整套保护区建设的途径与技术；在总体规划经营上，建立了比较严密的保护管理体系,核心区已建成较合理的草原自然生态系统，试验区的植被基本得到恢复；在综考的基础上，科研以旱地建设为目标，摸索出了半干旱黄土丘陵区草场恢复改良的途径与技术,先后引进筛选优良牧草20种,其中沙打旺。红豆草等8种已得到大面积推广种植,并在野生沙打旺特性及引种驯化方面的研究取得了突破性进展

Aripiprazole versus other atypical antipsychotics for schizophrenia

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 p→νˉK+p\to \bar\nu K^+ Searches

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 $p\to \bar\nu K^+$ 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 $p\to \bar\nu K^+$ 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 $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ 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 suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies