pump

摘要： A method is proposed for compressing laser pulses by fast-extending plasma gratings(FEPGs),which are created by ionizing a hypersonic wave generated by stimulated Brillouin scattering in a background gas.Ionized by a short laser pulse,the phonon forms a light-velocity FEPG to fully reflect a resonant pump laser.As the reflecting surface moves with the velocity of light,the reflected pulse is temporally overlapped and compressed.One-and two-dimensional fully kinetic particle-in-cell simulations with a laser wavelength of 1μm show that in this regime,a pump pulse is compressed from 10–40 ps to 7–10 fs(i.e.,a few optical cycles),with a two-dimensional transfer efficiency up to 60%.This method is a promising way to produce critical laser powers while avoiding several significant problems that arise in plasma-based compressors,including an unwanted linear stage,major plasma instabilities,and the need for seed preparation.

摘要： Axillary intra-aortic balloon pump(IABP)used has increased in the recent few years after UNOs allocation system changes.IABP’s design and counterpulsation mechanism is highly regarded for its safety profile,simplicity and relative ease in management and care.However,despite continuous innovative efforts,the potential for complications still exists.The Benchmark registry is widely regarded as the tool for monitoring the evolving practice of IABP.The most common complications reported are balloon perforation,bleeding,migration,limb ischemia.Despite continuous innovative efforts,the potential for complications still exists.

摘要： cqvip:Clinac CX直线加速器是美国瓦里安公司在中国生产的主要面向中国市场的新型直线加速器,主要分为低能机型和高能机型(在高能机型上配有图像引导放射治疗部件),是目前用量最大的放射治疗机型之一,主要采用兆级高电压产生的X线或电子线精确照射患者肿瘤部位以杀灭恶性细胞。Clinac CX直线加速器能产生高能X线和电子线,具有剂量率高、照射时间短、照射野大、剂量均匀性和稳定性好等优点,并能进行三维立体定向治疗、三维适形放射治疗、调强放射治疗,在肿瘤科临床上具有很高应用价值。

摘要： 利用Pumplinx软件进行数值模拟,分析闭式叶轮泵腔大小对圆盘摩擦损失的影响——用Pumplinx软件分析闭式叶轮前后盖板与壳体间空腔体积变化时低比转速离心泵性能的变化情况,总结泵腔与叶轮外径的关系,为减少损失,提高泵效率指明方向。

摘要： We present particle-in-cell(PIC)simulations of laser plasma instabilities(LPIs)with a laser pulse duration of a few picoseconds.The simulation parameters are appropriate to the planar-target LPI experimental conditions on SG-II.In this regime,the plasmas are characterized by a long electron density scale length and a large electron density range.It is found that when the incident laser intensity is well above its backward stimulated Raman scattering(backward SRS,BSRS)threshold,the backscattered light via the primary BSRS is intense enough to excite secondary SRS(Re-SRS)in the region below one-ninth of the critical density of the incident laser.The daughter light wave via the secondary BSRS(Re-BSRS)is amplified as it propagates toward the higher-density region in the bath of broadband light generated through the primary BSRS process.A higher intensity of the incident laser not only increases the amplitude of the BSRS light but also increases the convective amplification lengths of the Re-BSRS modes by broadening the spectrum of the BSRS light.Convective amplification of Re-BSRS causes pump depletion of the primary BSRS light and may lead to an underestimate of the primary BSRS level in SP-LPI experiments.Asignificant fraction of the generation of energetic electrons is strongly correlated with the Re-BSRS modes and should be considered as a significant energy loss.

摘要： p;Calculation;Diagnosis The vibration measuring standard for compound machinery utilized in modern industrial production will be employed for the application of detecting technologies.The vibration intensity can be obtained by selecting the detecting method to obtain the speed of mechanical vibration,and technicians can examine whether the vibrating machinery is in a proper functioning state based on the value of vibration intensity,allowing for thorough fault diagnosis.In order to provide useful diagnosis ideas for technicians,this study examines the measurement of mechanical vibration and investigates the calculating method of mechanical vibration intensity.

摘要： "Deep in the middle of the woods,"said my mother,"is the place where the king of the pumpkins lives.""But pumpkins live in fields~1,not in forests,"I said to my mother.She wouldn’t listen to me."I’m telling you,"she said,"the king of the pumpkins lives in the middle of the woods and the woods that he lives in are the woods right next to our house.

摘要： BACKGROUND The exact mechanism of proton pump inhibitors(PPIs)-induced hypomagnesemia(PPIH) is largely unknown. Previous studies proposed that PPIH is a consequence of intestinal Mg2+ malabsorption. However, the mechanism of PPIs-suppressed intestinal Mg2+ absorption is under debate.AIM To investigate the effect of 12-wk and 24-wk omeprazole injection on the total,transcellular, and paracellular Mg2+ absorption in the duodenum, jejunum, ileum,and colon of male Sprague-Dawley rats.METHODS The rats received 20 mg/kg·d subcutaneous omeprazole injection for 12 or 24 wk.Plasma and urinary Mg2+, Ca2+, and PO43-levels were measured. The plasma concentrations of 1α,25-dihydroxyvitamin D3(1α,25(OH)2D3), parathyroid hormone(PTH), fibroblast growth factor 23(FGF-23), epidermal growth factor(EGF), and insulin were also observed. The duodenum, jejunum, ileum, and colon of each rat were mounted onto individual modified Using chamber setups to study the rates of total, transcellular, and paracellular Mg2+ absorption simultaneously. The expression of transient receptor potential melastatin 6(TRPM6) and cyclin M4(CNNM4) in the entire intestinal tract was also measured.RESULTS Single-dose omeprazole injection significantly increased the intraluminal p H of the stomach, duodenum, and jejunum. Omeprazole injection for 12 and 24 wk induced hypomagnesemia with reduced urinary Mg2+ excretion. The plasma Ca2+ was normal but the urinary Ca2+ excretion was reduced in rats with PPIH. The plasma and urinary PO43-levels increased in PPIH rats. The levels of1α,25(OH)2D3 and FGF-23 increased, whereas that of plasma EGF decreased in the omeprazole-treated rats. The rates of the total, transcellular, and paracellular Mg2+ absorption was significantly lower in the duodenum, jejunum, ileum, and colon of the rats with PPIH than in those of the control rats. The percent suppression of Mg2+ absorption in the duodenum, jejunum, ileum, and colon of the rats with PPIH compared with the control rats was 81.86%, 70.59%, 69.45%,and 39.25%, respectively. Compared with the control rats, the rats with PPIH had significantly higher TRPM6 and CNNM4 expression levels throughout the intestinal tract.CONCLUSION Intestinal Mg2+ malabsorption was observed throughout the intestinal tract of rats with PPIH. PPIs mainly suppressed small intestinal Mg2+ absorption. Omeprazole exerted no effect on the intraluminal acidic pH in the colon. Thus, the lowest percent suppression of total Mg2+ absorption was found in the colon. The expression levels of TRPM6 and CNNM4 increased, indicating the presence of a compensatory response to Mg2+ malabsorption in rats with PPIH. Therefore, the small intestine is an appropriate segment that should be modulated to counteract PPIH.

摘要： 本发明涉及一种多模Pump EYDFA光纤放大器装置，包括第一隔离器、模式整理器、铒镱共掺单模单包层光纤、第二隔离器和多模Pump激光器，所述的模式整理器分别与第一隔离器和多模Pump激光器相连接，所述的铒镱共掺单模单包层光纤与模式整理器相连接，所述的第二隔离器与铒镱共掺单模单包层光纤相连接。采用了本发明的多模Pump EYDFA光纤放大器装置，具有940nm多模Pump 2W输出功率，常规非常大批量且低成本的该Pump都可以输出10W功率，降额到20％，极大提高了产品寿命，实现了低成本500mW的1550nm放大输出。成本只有EYDFA的30％，而该功率EDFA基本做不到。

摘要： 本发明提供一种PUMP系统的分压反馈电路，该电路包括：分压反馈模块，输入端与PUMP的输出端相连，输出端与PUMP的输入端相连；稳压及充电模块，控制端接第一控制信号，第一端与电源相连，第二端与分压反馈模块中比较器的参考电压提供端相连，第三端与分压反馈模块中第一电阻节点相连，第一电阻节点与比较器相连；当分压反馈模块中第一开关模块导通时，第一控制信号控制稳压及充电模块对第一电阻节点充电预设时间，稳压及充电模块还将第一电阻节点的电压钳位为比较器的参考电压。本发明能够加快分压反馈模块中第一电阻节点的电压建立速度，并可以将第一电阻节点的电压钳位为比较器的参考电压，有利于PUMP系统的快速稳定。

摘要： 本发明公开了一种PUMP电压的组合调节电路，应用于非易失性存储器的电荷泵电路，该非易失性存储器具有电流型灵敏放大器，包括：第一稳压电路，根据电荷泵电路的输出、所选择的电压挡位、第一参考电压输出对应的电压；第二稳压电路，用于向第一稳压电路提供不同挡位的第一参考电压和调整该灵敏放大器的参考电流，由于调整该灵敏放大器的参考电流的电路在添加少量开关和导线后为第二稳压电路，及第一稳压电路本身即是电荷泵电路中的PUMP电压的组合调节电路，故本发明实施例通过添加少量的开关和导线对调整该电流型灵敏放大器的参考电流的电路进行复用，从而在不影响其原有功能的情况下，实现不增加对应的用于分压的电子元件即可增加电压挡位的目的。

摘要： 本发明公开了一种减少纹波的PUMP电路，PUMP电路包括：PUMP主体，分压电路，比较电路，用于根据PUMP电路的输出电压的分压和参考电压的大小，产生输出电流；偏置电路，与比较电路相连，用于根据输出电流生成第二偏置电流，输出电流是第二偏置电流的若干倍；时钟控制电路，与偏置电路和PUMP电路相连，用于根据第二偏置电流产生控制PUMP主体工作的第一时钟信号，当第二偏置电流变小，则第一时钟信号的频率对应变慢，当第二偏置电流变大，则第一时钟信号的频率对应变快，因为本发明实施例是通过第二偏置电流的变化来直接控制第一时钟信号的频率从而控制输出电压的变化快慢的，所以能够减少读取电压的纹波，提高读取电压的稳定性，从而保证读取操作的正确性。

摘要： 本发明公开了一种基于PUMP设计的无电容小尺寸驱动面板，其特征在于：该基于PUMP设计的无电容小尺寸驱动面板包括：供电模块，用于为一级升压模块供给初始电压VCI；一级升压模块，用于将初始电压VCI放大，获得一级电压AVDD1，输给二级升压模块；二级升压模块，用于将一级电压AVDD1放大，获得二级电压AVDD2；供电模块连接一级升压模块，一级升压模块连接二级升压模块，与现有技术相比，本发明的有益效果是：本发明将升压电路分为一级升压模块、二级升压模块，降低升压的负担，使得移除外部电容元件，改用MIM电容和MOS CAP变得可行，实现小尺寸驱动面板上实现无外部电容，进一步降低小尺寸驱动面板整体的体积。

摘要： 本发明涉及一种多模Pump EYDFA光纤放大器装置，包括第一隔离器、模式整理器、铒镱共掺单模单包层光纤、第二隔离器和多模Pump激光器，所述的模式整理器分别与第一隔离器和多模Pump激光器相连接，所述的铒镱共掺单模单包层光纤与模式整理器相连接，所述的第二隔离器与铒镱共掺单模单包层光纤相连接。采用了本发明的多模Pump EYDFA光纤放大器装置，具有940nm多模Pump 2W输出功率，常规非常大批量且低成本的该Pump都可以输出10W功率，降额到20％，极大提高了产品寿命，实现了低成本500mW的1550nm放大输出。成本只有EYDFA的30％，而该功率EDFA基本做不到。

摘要： 本发明公开了一种宽电压低功耗强驱动能力pump电路及非易失性存储器，通过设置一个输入电压VCC检测模块，当输入电压VCC高于等于某一设定值时，pump电路本体只启动常开电荷泵模块；当输入电压VCC低于某一设定值时，pump电路本体同时启动常开电荷泵模块和可关闭电荷泵模块；当只启动常开电荷泵模块时，把时钟控制脉冲模块中与可关闭电荷泵模块对应的时钟控制脉冲信号也关闭，不产生多余的电流消耗。

摘要： 本申请涉及存储芯片控制技术领域，具体提供了一种pump电路，其包括：升压电路组，用于根据时钟信号CLK生成输出电压VOUT，其一端与电源电压VCC连接，所述升压电路组包括多个升压电路；时钟控制电路，与所述升压电路组的另一端连接，用于获取所述输出电压VOUT，并根据所述输出电压VOUT生成所述时钟信号CLK；级数控制电路，与所述升压电路组的另一端连接，用于根据所述输出电压VOUT调节所述升压电路组中用于生成所述输出电压VOUT的所述升压电路的接入数量；当输出电压VOUT较高时，级数控制电路控制较少的升压电路接入升压电路组以降低输出电压VOUT和驱动电流，本申请可以使用更小规格的电容从而避免出现设计冗余和产生大量无用功耗的情况。

摘要： 本实用新型公开了一种电磁阀和pump电机驱动器，包括控制单元、电磁阀驱动单元、电机驱动单元、通讯单元。所述控制单元主要包含ASIC芯片。所述电磁阀驱动单元包含8路电流控制驱动电路，4路开关控制驱动。所述电机驱动单元包含驱动电路和续流电路。所述通讯电路包含SPI通讯及信号隔离电路。本实用新型电路集成度高，控制算法简单，系统安全性高，当故障发生时驱动器能采取相应的措施进行保护，避免产生严重后果。

摘要： 本实用新型涉及光纤陀螺技术领域，具体公开了一种用于SLD和pump‑LD光源驱动电路的性能检查装置，包括电源、用于调节温度的控温箱、单片机和显示屏，电源电连接单片机和显示屏，电源电连接有供电切换模块，所述控温箱包括箱体，箱体内设有光源、热敏电阻和散热器，光源两侧分别设有加热片和TEC降温片，加热片和TEC降温片分别与供电切换模块电连接，光源与待检测光源板电连接，显示屏、热敏电阻、光源和待检测光源板分别与单片机电连接。