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GnRH antagonist protocol, as a common clinical ovulation protocol, has the advantages of flexibility, economy and safety. However, the early-onset LH peak due to inadequate dosing or inappropriate timing of antagonist addition can ultimately affect pregnancy outcomes. We review the clinical data of a patient who developed an occult LH peak during the antagonist regimen. The patient showed an increased level of progesterone and a decreased level of estradiol during her ovulation with the antagonist regimen, suggesting the occurrence of an occult LH peak. She also had a premature ovulation during the oocyte retrieval procedures. In the second cycle, the long-lasting luteal phase regimen was used to effectively reduce the appearance of endogenous LH peak, and 8 eggs were successfully obtained. We also discuss the diagnosis and prevention of occult LH peak occurring in antagonist regimens in this paper [ABSTRACT FROM AUTHOR]

Copyright of Electric Power Engineering Technology is the property of Editorial Department of Electric Power Engineering Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electric Power Engineering Technology is the property of Editorial Department of Electric Power Engineering Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food & Machinery is the property of Food & Machinery Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental Science & Technology (10036504) is the property of Editorial Board of Environmental Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The optimal reuse of abandoned mining land is of great practical significance to construct and expand the space that required by the transformation of resource-based towns in China. Taking Mentougou District of Beijing as an example, the 3S technology and field research were integrated to analyze the type, area, distribution, reuse status, as well as the temporal and spatial changes of abandoned mining land. A dynamic environment model of geographical process (Dinamica EGO) was used to simulate the reuse pattern of abandoned mining land under the trend development scenario. The appropriateness of abandoned mining land was evaluated to reuse for the ecological agriculture, ecological tourism, and high-tech industry under the functional positioning of “Capital ecological conservation development area” of Mentougou District using principal component analysis and BP neural network. According to the suitability evaluation and the land needs of industrial transformation, the land conversion rules were established to optimize the quantitative structure using the linear niche programming model and constraint conditions. Dinamica EGO model was then used to optimize the spatial pattern of the abandoned mining land that reused for the industrial transformation. Regulation was conducted to compare the optimization pattern with the trend development. The results showed were as follows: 1) A total of 323.30 hm2 of abandoned mining land was reused in the study area from 2006 to 2018. The abandoned mining land in the western towns was mainly reused as the woodland, cultivated land and orchards, while the abandoned mining land in eastern towns was mainly reused as the woodland, park, residential, and high-tech industrial land. 2) In the trend development scenario pattern, the abandoned mining land reused as ecological agricultural land was mainly distributed in Miaofengshan and Tanzhesi Town, the ecological tourism industry was mainly distributed in Datai Street and Wangping Town, and the high-tech industrial land was in Datai Street and Junzhuang Town. In the optimized pattern of abandoned mining land reuse for the industrial transformation, the area of abandoned mining land reused as the ecological agriculture was 251.75 hm2, mainly concentrated in Junzhuang, and Wangping Town, the reused area of the ecotourism was 67.25 hm2 in Miaofengshan, and Qingshui Town, and the area as the high-tech industry was 84.25 hm2 in Wangping and Miaofengshan Town. 3) In the two scenarios, about 108.5 hm2 of abandoned mining land was reused for the same purpose, indicating no adjustment to need. About 63.75 hm2 of abandoned mining land was reused as the ecological tourism land under the trend development scenario, which should be adjusted to the ecological agriculture land. By contrast, the ecological agriculture land was about 61 hm2 of abandoned mining land under the trend development scenario, which should be adjusted to the ecological tourism land. There was the 12.5 hm2 abandoned mining land should be developed into the high-tech industrial land in the Miaofeng Mountain, Wangping, and Yongding Town, according to the local infrastructure. Consequently, the direct and substantial combination were realized for the reuse of abandoned mine land and the demand for the industrial transformation of mineral resource-based towns. The findings can provide the theoretical support for the reuse and regulation of local abandoned mine land. [ABSTRACT FROM AUTHOR]

Copyright of Journal of New Medicine is the property of Sun Yat Sen University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shandong Medical Journal is the property of Shandong Medical Health Newspapers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To explore the differences in cadmium (Cd) bioaccumulation and translocation between maize varieties and to screen maize varieties with low seed Cd accumulation, a field experiment was carried out with 50 varieties of maize. Maize varieties with high, medium, and low accumulation of Cd in seeds were screened using cluster analysis. Representative varieties were selected to analyze the bioaccumulation and translocation factors of Cd in different plant organs. The results showed that the seed Cd content of the 50 maize varieties ranged from 0.09 to 0.85 mg.kg-1, which meets the national feed hygiene standard. The bioaccumulation factor of Cd in the seeds of varieties was <1. According to cluster analysis, three types of maize with high, medium, and low accumulation were obtained, accounting for 8% (4) 34% (17) and 58% (29）of the tested varieties, respectively. The bioaccumulation factors of Cd in soil by roots, shoots, corncobs, and seeds of high -, medium -, and low -accumulation representative varieties were <1, and the translocation factors of Cd in shoots and seeds were 1.17~1.31, 0.60~0.76; 0.90~0.96, 0.26~0.27; and 0.84~0.87, 0.08~0.10, respectively. The parts that exhibited a stronger Cd accumulation ability in the soil of representative high-, medium-, and low-accumulation maize varieties were shoots, roots, and roots, respectively, and the ability of shoots and seeds to transport Cd decreased sequentially. All 50 maize varieties were planted on strictly controlled cultivated land to produce maize feed. Among them, 29 dominant varieties with low accumulation of Cd in seeds, including Xindan 58 and Meijia 303, can be tested for priority protection and safe utilization of cultivated land to produce safe edible maize. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Hydrobiology is the property of Editorial Department of Journal of Hydrobiology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science Technology & Engineering is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of China Medical University is the property of Journal of China Medical University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ecology & Rural Environment is the property of Journal of Ecology & Rural Environment Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Aiming at the problems of various influencing factors and lack of historical data in spatial load forecasting, a spatial load forecasting method considering multi-dimensional feature and data enhancement is proposed. Firstly, considering various factors affecting power load, a regional multi-dimensional index model is established from the development intensity, development level and climate conditions. Then the data generation model of generative adversarial networks（GAN） is constructed to enhance the training set and generate a sufficient number of training samples in line with regional characteristics. Secondly, particle swarm optimization (PSO) algorithm is used to optimize the initial weight and threshold back propagation (BP) neural network to establish the spatial load forecasting model, and the enhanced data set is used to realize the spatial load forecasting. Finally, taking four districts of an eastern city as an example, the method is verified. The simulation results show that the method proposed in this paper can improve the accuracy of spatial load forecasting, and has practicability and effectiveness. [ABSTRACT FROM AUTHOR]

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Clinical Hepatology / Linchuang Gandanbing Zazhi is the property of Journal of Clinical Hepatology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of China Medical University is the property of Journal of China Medical University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science Technology & Engineering is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The temporal and spatial variation characteristics of threshold value, strength and frequency of extreme high temperature in summer (June to August)of Shanxi Province were calculated and counted by percentile method, and interpolated by the methods of Inverse Distance Weight, Kriging and Anu spline based on the data of daily the maximum temperature from 67 national meteorological observational stations in Shanxi Province from 1971 to 2020. On this base, the comprehensive strength of extreme high temperature was evaluated. The study further analyzed the long term trend of the maximum temperature with the method of Theil Sen, and the mutation test of the maximum temperature was conducted by Mann Kendall test. The study results showed that the threshold values and strength of extreme high temperature were 29.4～37.7 oC and 30.2～38.4 oC respectively with an increase trend from north to south in summer of Shanxi Province from 1971 to 2020. In the past 50 years, frequency of extreme high temperature in summer was 5.8～8.0 d·a－1,which was higher in the southern Shanxi than that in the middle and north of Shanxi and that in the western Shanxi was higher than that in the eastern Shanxi. The comprehensive intensity of extreme high temperature before 1997 and around 2011 was weak, but the amplitude and extremity over⁃ all increased from 1997 to 2011 and from 2011 to 2020. The maximum temperature in most areas of Shanxi Province showed a significant increase trend, with an average rate of 0.3 oC·10 a－1 in summer during 1971－2020. The increase rate of the maximum temperature in the northern, middle and southern Shanxi were 0.3 oC·10 a－1, 0.3 oC·10 a－1 and 0.2 oC·10 a－1,respectively. The maximum temperature change abruptly in late 1990 s in the north and center of Shanxi, and the mutation occurred around the year of 2000 in southern Shanxi Province. The study results are of great significance to the prediction of extreme high temperature, impact assessment and the proposal of countermeasure in Shanxi Province, North China and the whole country in the future. [ABSTRACT FROM AUTHOR]

Copyright of China Medical Education Technology is the property of China Medical Education Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

肛门生殖器距离（AGD）作为产前雄激素暴露的敏感指标，已被国内外学者广泛应用于临床，在女性用来 研究与多囊卵巢综合征、子宫内膜异位症、卵巢储备功能低下的关系，在男性用来研究与睾丸发育不全综合征、原发 性早泄的关系。临床如果对肛门生殖器距离制定统一的测量标准和测量方法，可将AGD作为临床常规检查之一. [ABSTRACT FROM AUTHOR]

Different pay zones in the BZ oilfield have big permeability differences among them and high heterogeneity, resulting in preferential flow of block removing fluids into zones with high permeabilities during pumping which in turn further increasing the permeability differences among different zones. This is quite unsatisfactory to the removal of the blockage existing in the reservoir formations. Furthermore, the conventional VES diverting fluids are only sensitive to divalent cations, and are thus behaving poorly in offshore sandstone reservoirs which lack divalent cations. To solve this problem, a viscoelastic surfactant LD-VES, a K+ sensitive diverting fluid, were selected to combine with a block removing fluid to form a diverting block removing fluid for offshore sandstone reservoir operation. In laboratory experiment, the diverting fluid was evaluated for its viscosifying capacity, gel breaking performance, high temperature tolerance, shearing property and compatibility with the block removing fluid. The viscosifying, gel breaking and flowback mechanisms of the diverting fluid were analyzed. Field application of the diverting block removing fluid has shown that the fluid has the best viscosifying effect at KCl mass fraction of 7%. At 120 ℃, the viscosity of the fluid was 1, 680 mPa∙s at shearing rate of 50 r/min. After being sheared for 2 hours at 170 s−1, the viscosity was still 1,750 mPa∙s, indicating that the fluid had excellent viscosifying capacity, high temperature tolerance and shearing property. The mixture of the diverting fluid and the block removing fluid produced no precipitation and residue, indicating that they had good compatibility with each other. After mixing kerosene with the diverting block removing fluid in 1 : 1 volume ratio, the gel of the diverting block removing fluid was soon broken. Field application of this diverting block removing fluid produced liquid of 27.92 m³/d, a production rate 3.49 times higher than that before the application (which was only 8 m³/d), and oil of 16.75 m³/d, 4.05 times of the production rate before the application. [ABSTRACT FROM AUTHOR]

Copyright of Imaging Science & Photochemistry is the property of Imaging Science & Photochemistry Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)