In this paper, we first analyzed cloud drift wind(CDW) data distribution in the vertical direction, and then reassigned the height of every CDW in the research domain in terms of background information, and finally, c...In this paper, we first analyzed cloud drift wind(CDW) data distribution in the vertical direction, and then reassigned the height of every CDW in the research domain in terms of background information, and finally, conducted contrast numerical experiments of assimilating the CDW data before and after reassignment to examine the impacts on the forecast of the track of Typhoon Chanthu(1003) from 00:00(Coordinated Universal Time) 21 July to 00:00 UTC23 July, 2010. The analysis results of the CDW data indicate that the number of CDWs is mainly distributed in the midand upper-troposphere above 500 h Pa, with the maximum number at about 300 h Pa. The height reassigning method mentioned in this work may update the height effectively, and the CDW data are distributed reasonably and no obvious contradiction occurs in the horizontal direction after height reassignment. After assimilating the height-reassigned CDW data, especially the water vapor CDW data, the initial wind field around Typhoon Chanthu(1003) became more reasonable, and then the steering current leading the typhoon to move to the correct location became stronger. As a result, the numerical track predictions are improved.展开更多
In light-sheet fluorescence microscopy,the axial resolution and field of view are mutually constrained.Axially swept light-sheet microscopy(ASLM)can decouple the trade-off,but the confocal detection scheme using a rol...In light-sheet fluorescence microscopy,the axial resolution and field of view are mutually constrained.Axially swept light-sheet microscopy(ASLM)can decouple the trade-off,but the confocal detection scheme using a rolling shutter also rejects fluorescence signals from the specimen in the field of interest,which sacrifices the photon efficiency.Here,we report a laterally swept light-sheet microscopy(LSLM)scheme in which the focused beam is first scanned along the axial direction and subsequently laterally swept with the rolling shutter.We show that LSLM can obtain a higher photon efficiency when similar axial resolution and field of view can be achieved.Moreover,based on the principle of image scanning microscopy,applying the pixel reassignment to the LSLM images,hereby named iLSLM,improves the optical sectioning.Both simulation and experimental results demonstrate the higher photon efficiency with similar axial resolution and optical sectioning.Our proposed scheme is suitable for volumetric imaging of specimens that are susceptible to photobleaching or phototoxicity.展开更多
We present a case of a transsexual patient who underwent a partial pelvectomy and genital reconstruction for anal cancer after chemoradiation. This is the first case in literature reporting on the occurrence of anal c...We present a case of a transsexual patient who underwent a partial pelvectomy and genital reconstruction for anal cancer after chemoradiation. This is the first case in literature reporting on the occurrence of anal cancer after male-to-female sex reassignment surgery. We describe the surgical approach presenting our technique to avoid postoperative complications and preserve the sexual reassignment.展开更多
A group of 39 Transgender subjects, 17 Female to Male (FtM) and 22 Male to Female (MtF), have been evaluated about their sexual desire, activity, and satisfaction during the period before and after Sex Reassignment by...A group of 39 Transgender subjects, 17 Female to Male (FtM) and 22 Male to Female (MtF), have been evaluated about their sexual desire, activity, and satisfaction during the period before and after Sex Reassignment by Surgery (SRS). Visual Analogue Scale from 0 to 10 has been used to assess sexual desire and satisfaction, number of sexual partners and number of sexual intercourses/ month have been evaluated to assess sexual activity. Moreover, after the surgery, the Sexual Desire Inventory-2 (SDI-2) was administered to patients and related to testosterone (total or free) levels. In FtM, after hysterectomy and bilateral ovariectomy, mean value of sexual desire (VAS 0 - 10) was 7.5 before beginning testosterone therapy, this value increased after six months of therapy and after one year. Just before SRS the value decreased, but increased to 8.42 after SRS. In the same patients the values (VAS 0 - 10) on sexual satisfaction were respectively 6.5, 6.9, 7.1, 6.5 and 7. Mean number of partners was 4, with 7.07 mean frequency of sexual intercourse/month, before starting therapy (after hysterectomy). During hormonal therapy (testosterone), No. of partners was 2.46 and 8.96 intercourses/month, while after SRS the partners were 1.25 and intercouses/month 7.91. MtF patients reported a sexual desire (VAS 0 - 10) before therapy of 7, this remained almost constant after 6 months, decreases after 12 months and just before surgery, and finally increased to 7.76 after SRS. For sexual satisfaction mean values of VAS were respectively: 6.1, 6.2, 6.3, 6, and 6.8. Regarding sexual activity, MtF report 3.81 mean No. of partners and 9.27 intercouses/month before the beginning of hormonal therapy, 1.36 partners and 4.36 intercourses after therapy, and 1.3 partners and 4.54 intercourses after SRS.展开更多
A method for using height reassignment to improve the quality of satellite-derived atmospheric motion vectors （AMVs） is presented. The rationale underlying height reassignment is explored, and the technical details ...A method for using height reassignment to improve the quality of satellite-derived atmospheric motion vectors （AMVs） is presented. The rationale underlying height reassignment is explored, and the technical details are studied by applying three height reassignment schemes that use NCEP reanalysis winds. The quality of the AMVs is generally improved following reassignment, although the magnitude of the improve- ment differs according to the scheme applied. Scheme 3 provides the best quality and stability, followed by Scheme 1 and Scheme 2. The negative biases in the zonal components of the AMVs decrease from [ 5, 4] m s^-1 to 〈- 1 m s 1 following reassignment. The meridional components also improve. The AMVs derived from the infrared and water vapor channels improve by 58.7% and 25%, respectively, The feasibility of using Scheme 3 in the operational derivation of AMVs is studied by incorporating the forecast wind field predicted by a T511 medium-range numerical weather prediction （NWP） system. Incorporating the 12-h forecast reduces the negative biases in zonal winds and positive biases in meridional winds retrieved from the water vapor channel, improving the overall quality of the AMVs by 26.7%. Extending the validity period of the forecast field linearly reduces the improvement in retrieved AMVs, but the magnitude of this reduction is small. Incorporating the 120-h forecast field still results in a 13% improvement, although it may eliminate a larger number of AMVs of good quality.展开更多
Serializable snapshot isolation(SSI)is a promising technique to exploit parallelism for multi-core databases.However,SSI suffers from excessive transaction aborts.Existing remedies have three drawbacks:1)tracking proh...Serializable snapshot isolation(SSI)is a promising technique to exploit parallelism for multi-core databases.However,SSI suffers from excessive transaction aborts.Existing remedies have three drawbacks:1)tracking prohibitively transitive dependencies;2)aborting on every writewrite conflict;and 3)requiring manual annotation on transaction programs.In this paper,we propose to suppress transaction aborts by reassigning timestamps.We combine static analysis with augmented query plan.In this way,we save both aborts caused by read-write and write-write conflicts,without tracking transitive dependency and annotating transaction programs.As such,our approach does not exhibit drawbacks of existing methods.Extensive experiments demonstrate the effectiveness and practicality of our approach.展开更多
针对多重同步挤压变换及其改进算法存在的未重排点问题,提出了一种基于最大系数的多重同步挤压变换(maximum coefficient based multi-synchrosqueezing transform,简称MCMSST)方法来识别时变结构非平稳响应信号的瞬时频率(instantaneou...针对多重同步挤压变换及其改进算法存在的未重排点问题,提出了一种基于最大系数的多重同步挤压变换(maximum coefficient based multi-synchrosqueezing transform,简称MCMSST)方法来识别时变结构非平稳响应信号的瞬时频率(instantaneous frequency,简称IF)。首先,引入傅里叶频谱来辅助多分量响应信号选取截止频率;其次,对响应信号进行短时傅里叶变换(short time fourier transform,简称STFT),针对短时傅里叶变换系数求取针对时间的偏导,从而获得估算的瞬时频率;然后,在对瞬时频率的估算值进行多次迭代的基础上,仅保留时频系数模值最大处所对应的估算瞬时频率,并将其余位置的瞬时频率值归零;最后,对时频系数模值最大处所对应的瞬时频率进行时频重排即可得到细化后的瞬时频带。由于基于MCMSST方法提取的是瞬时频带,故采用时频系数模极大值法在限定的频带范围内提取瞬时频率曲线。通过2组数值算例和1个铝合金悬臂梁质量突变试验,验证了所提方法的有效性。研究结果表明,MCMSST方法不仅彻底解决了未重排点问题,而且提高了瞬时频率的识别精度和抗噪能力。展开更多
基金Specialized Science Project for Public Welfare Industries(Metrological Sector)(GYHY201206010,GYHY201406009)Science and Technology Planning Project for Guangdong Province(2012A061400012)+3 种基金Program for the 12th Five-Year Economic Development(2012BAC22B00)Natural Science Foundation of China(41075083)Program for Integration and Application of Key Meteorological Techniques from CMA(CMAGJ2012M36)Project from Guangdong Meteorological Bureau(2013A04)
文摘In this paper, we first analyzed cloud drift wind(CDW) data distribution in the vertical direction, and then reassigned the height of every CDW in the research domain in terms of background information, and finally, conducted contrast numerical experiments of assimilating the CDW data before and after reassignment to examine the impacts on the forecast of the track of Typhoon Chanthu(1003) from 00:00(Coordinated Universal Time) 21 July to 00:00 UTC23 July, 2010. The analysis results of the CDW data indicate that the number of CDWs is mainly distributed in the midand upper-troposphere above 500 h Pa, with the maximum number at about 300 h Pa. The height reassigning method mentioned in this work may update the height effectively, and the CDW data are distributed reasonably and no obvious contradiction occurs in the horizontal direction after height reassignment. After assimilating the height-reassigned CDW data, especially the water vapor CDW data, the initial wind field around Typhoon Chanthu(1003) became more reasonable, and then the steering current leading the typhoon to move to the correct location became stronger. As a result, the numerical track predictions are improved.
基金supported by the National Natural Science Foundation of China(62005116 and 51720105015)the Science and Technology Innovation Commission of Shenzhen(KQTD20170810110913065 and 20200925174735005).
文摘In light-sheet fluorescence microscopy,the axial resolution and field of view are mutually constrained.Axially swept light-sheet microscopy(ASLM)can decouple the trade-off,but the confocal detection scheme using a rolling shutter also rejects fluorescence signals from the specimen in the field of interest,which sacrifices the photon efficiency.Here,we report a laterally swept light-sheet microscopy(LSLM)scheme in which the focused beam is first scanned along the axial direction and subsequently laterally swept with the rolling shutter.We show that LSLM can obtain a higher photon efficiency when similar axial resolution and field of view can be achieved.Moreover,based on the principle of image scanning microscopy,applying the pixel reassignment to the LSLM images,hereby named iLSLM,improves the optical sectioning.Both simulation and experimental results demonstrate the higher photon efficiency with similar axial resolution and optical sectioning.Our proposed scheme is suitable for volumetric imaging of specimens that are susceptible to photobleaching or phototoxicity.
文摘We present a case of a transsexual patient who underwent a partial pelvectomy and genital reconstruction for anal cancer after chemoradiation. This is the first case in literature reporting on the occurrence of anal cancer after male-to-female sex reassignment surgery. We describe the surgical approach presenting our technique to avoid postoperative complications and preserve the sexual reassignment.
文摘A group of 39 Transgender subjects, 17 Female to Male (FtM) and 22 Male to Female (MtF), have been evaluated about their sexual desire, activity, and satisfaction during the period before and after Sex Reassignment by Surgery (SRS). Visual Analogue Scale from 0 to 10 has been used to assess sexual desire and satisfaction, number of sexual partners and number of sexual intercourses/ month have been evaluated to assess sexual activity. Moreover, after the surgery, the Sexual Desire Inventory-2 (SDI-2) was administered to patients and related to testosterone (total or free) levels. In FtM, after hysterectomy and bilateral ovariectomy, mean value of sexual desire (VAS 0 - 10) was 7.5 before beginning testosterone therapy, this value increased after six months of therapy and after one year. Just before SRS the value decreased, but increased to 8.42 after SRS. In the same patients the values (VAS 0 - 10) on sexual satisfaction were respectively 6.5, 6.9, 7.1, 6.5 and 7. Mean number of partners was 4, with 7.07 mean frequency of sexual intercourse/month, before starting therapy (after hysterectomy). During hormonal therapy (testosterone), No. of partners was 2.46 and 8.96 intercourses/month, while after SRS the partners were 1.25 and intercouses/month 7.91. MtF patients reported a sexual desire (VAS 0 - 10) before therapy of 7, this remained almost constant after 6 months, decreases after 12 months and just before surgery, and finally increased to 7.76 after SRS. For sexual satisfaction mean values of VAS were respectively: 6.1, 6.2, 6.3, 6, and 6.8. Regarding sexual activity, MtF report 3.81 mean No. of partners and 9.27 intercouses/month before the beginning of hormonal therapy, 1.36 partners and 4.36 intercourses after therapy, and 1.3 partners and 4.54 intercourses after SRS.
基金Supported by the National Natural Science Foundation of China (40705037)China Meteorological Administration Special Public Welfare Research Fund (GYHY201206002)
文摘A method for using height reassignment to improve the quality of satellite-derived atmospheric motion vectors （AMVs） is presented. The rationale underlying height reassignment is explored, and the technical details are studied by applying three height reassignment schemes that use NCEP reanalysis winds. The quality of the AMVs is generally improved following reassignment, although the magnitude of the improve- ment differs according to the scheme applied. Scheme 3 provides the best quality and stability, followed by Scheme 1 and Scheme 2. The negative biases in the zonal components of the AMVs decrease from [ 5, 4] m s^-1 to 〈- 1 m s 1 following reassignment. The meridional components also improve. The AMVs derived from the infrared and water vapor channels improve by 58.7% and 25%, respectively, The feasibility of using Scheme 3 in the operational derivation of AMVs is studied by incorporating the forecast wind field predicted by a T511 medium-range numerical weather prediction （NWP） system. Incorporating the 12-h forecast reduces the negative biases in zonal winds and positive biases in meridional winds retrieved from the water vapor channel, improving the overall quality of the AMVs by 26.7%. Extending the validity period of the forecast field linearly reduces the improvement in retrieved AMVs, but the magnitude of this reduction is small. Incorporating the 120-h forecast field still results in a 13% improvement, although it may eliminate a larger number of AMVs of good quality.
基金supported by the National Key R&D Program of China(2018YFB1004401)the National Natural Science Foundation of China Key Project(Grant No.61732014).
文摘Serializable snapshot isolation(SSI)is a promising technique to exploit parallelism for multi-core databases.However,SSI suffers from excessive transaction aborts.Existing remedies have three drawbacks:1)tracking prohibitively transitive dependencies;2)aborting on every writewrite conflict;and 3)requiring manual annotation on transaction programs.In this paper,we propose to suppress transaction aborts by reassigning timestamps.We combine static analysis with augmented query plan.In this way,we save both aborts caused by read-write and write-write conflicts,without tracking transitive dependency and annotating transaction programs.As such,our approach does not exhibit drawbacks of existing methods.Extensive experiments demonstrate the effectiveness and practicality of our approach.
文摘针对多重同步挤压变换及其改进算法存在的未重排点问题,提出了一种基于最大系数的多重同步挤压变换(maximum coefficient based multi-synchrosqueezing transform,简称MCMSST)方法来识别时变结构非平稳响应信号的瞬时频率(instantaneous frequency,简称IF)。首先,引入傅里叶频谱来辅助多分量响应信号选取截止频率;其次,对响应信号进行短时傅里叶变换(short time fourier transform,简称STFT),针对短时傅里叶变换系数求取针对时间的偏导,从而获得估算的瞬时频率;然后,在对瞬时频率的估算值进行多次迭代的基础上,仅保留时频系数模值最大处所对应的估算瞬时频率,并将其余位置的瞬时频率值归零;最后,对时频系数模值最大处所对应的瞬时频率进行时频重排即可得到细化后的瞬时频带。由于基于MCMSST方法提取的是瞬时频带,故采用时频系数模极大值法在限定的频带范围内提取瞬时频率曲线。通过2组数值算例和1个铝合金悬臂梁质量突变试验,验证了所提方法的有效性。研究结果表明,MCMSST方法不仅彻底解决了未重排点问题,而且提高了瞬时频率的识别精度和抗噪能力。
