mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Optimized Design Method of Sharing Two Grounding Electrodes by Multi UHVDC Converter Stations

Ultra high voltage direct current(UHVDC) electrode sites choosing become more and more difficult due to the limited land resource, and it results in an urgent requirement of common electrode technology. The optimized designing method of two kinds of electrodes commonly used by multi converter stations is studied in this paper. The performance criteria and the rational jointing style between electrode lines and electrodes are analysed and determined at first, based on which, the mathematical model of the two kinds of electrodes is established,and an inequality equation set is formed to satisfy the relative standards of environmental impact on ground electrodes. Consequently the optimized designing method is presented through simplification of the model. After all, a specific example is given based on the parameters of Southwest Hydroelectric Project in China, in which two electrode sites had been pre chosen. The results show that, tens of plans of the two kinds of electrodes together with their electrode performances can be provided based on the presented method. The errors of current distribution ratio in all the examined plans are maintained about 1%, the maximum error of earthing resistance is 7% and the maximum error of step voltage is 4%, which prove the engineering practicality of the method.
Switching Impulse Strength of ± 800 kV UHVDC Transmission Line Air Gap Insulation Under High Altitude Condition

This paper is concerning switching impulse air gap insulation characteristics of rod-to-plane and V-string6-conductor bundle to tower body in ± 800 kV transmission lines. The tests were performed in China Southern Power Grid Co.,Ltd. (CSG) Kunming outdoor UHV laboratory at an altitude of 2 100 m. The switching impulse strength performance were obtained at a rod-to-plane arrangement and a full-scale model of 6-conductor bundle to tower. The test gap length of the typical rod-to-plane arrangement is 1.5?10 m and 5.3~8.2 m for the conductor-tower model, and the range of test voltage is about 450?3 100 kV. The critical positive switching impulse strength of conductor-tower gap is 1 525 kV in the gap length of 6.2 m. Additionally, the influence of the wave front time (100~1 700/s) on the 50% flashover voltage is discussed. According to the test data, the minimum air gap clearances of the conductor-tower model with V-insulators at the altitude of 2 100 m should be longer than 6.8 m (wave front time 250 μs) and 5. 8 m (wave front time 1 000 μs), respectively. The results are useful to air gap insulation design in UHVDC systems with rated voltage of ± 800 kV.
Insulation Coordination of ±1 000 kV/±1 100 kV UHVDC Converter Stations

The study result on insulation coordination of ± 1 000 kV and higher voltage grade ultra-high voltage(UHV) DC converter stations is presented. Aiming at the ± 1 000 kV UHVDC system, influences on arrester configuration and converter transformers insulation levels of converters' connections are discussed based on three schemes of serial converters structure: 500 kV+500 kV scheme,667 kV ±333 kV scheme and 400 kV±400 kV±200 kV scheme. Comparing with the 500 kV±±500 kV scheme,the 667 kV±333 kV scheme cannot reduce the maximum insulation level significantly and would bring problems to valve hall layout and operation controlling. The 400 kV±400 kV± 200 kV scheme has no economic advantage as it increases land occupation and amount of equipments. According to comprehensive comparison, the 500 kV ± 500 kV scheme is recommended for ± 1 000 kV UHVDC projects, and it is also suitable for higher voltage grade DC systems. According to system conditions of 1 100 kV,the switching impulse withstanding level (SIWL) of 2 100 kV and the lightning impulse withstanding level (LIWL) of2 350 kV are feasible for +1 100 kV UHVDC prcject, judging from the insulation levels. Meanwhile, arresters with higher performance are needed.
System Design and Research of Yunnan-Guangdong ± 800 kV UHVDC Project

The ± 800 kV ultra high voltage direct current (UHVDC) transmission system is an extraordinary challenge to system design and equipment manufacture. China Southern Power Grid Company (CSG) organized research and design for the construction of Yunnan-Guangdong ± 800 kV UHVDC project (YG UHVDC project), and got large technical breakthroughs and advanced technologies for ± 800 kV UHVDC transmission systems. These advanced technologies include power system stability, main electrical wiring, overvoltage and insulation coordination, external insulation, electromagnetic environment, control and protection, and arrangement of the main equipments. Meanwhile,CSG led the researches on specification of main equipments,such as converter valve,converter transformer, dry-type smooth reactor and others involved in the whole process management of equipment supervisions. The YG UHVDC project was put into commercial operation in 2010 as the first pilot ± 800 kV UHVDC project in the world. The whole system operated in a stable and smooth manner,and the UHVDC equipment and control systems passed the test under the practical operation in CSG bulk power system, which shows that the design and research objectives were achieved.
Overvoltage Level and Influencing Factors of Yunnan-Guangdong ± 800 kV DC Transmission Project in Islanded Operation Mode

Overvoltage is one of the key factors influencing whether Yunnan-Guangdong UHVDC Project can be operated in Islanded Mode or not. Based on the on-site test parameters of primary equipments and the actual control and protection system of the project, this paper performs calculations of the overvoltage level in islanded operation models. The influence of BLOCK process and load retard speed of Yunnan-Guangdong UHVDC on the overvoltage level in islanded mode is also studied. The results show that it is an important measure for suppressing the overvoltage level to switch off the converter transformer after ac filters have been switched off. The maximum per unit switching overvoltage is 1.71 (reference value is 449 kV) under various fault conditions. The maximum transient overvoltage is 1.66(reference value is 318 kV),but its duration is short. The maximum transient recovery voltage across AC filter/capacitor bank circuit breakers is less than 1 300 kV. The arrester's absorption energy in the case of a bipolar BLOCK can be greatly reduced with the protection logic modified with respect to decreasing current characteristic, which was compared with the protection logic of direct load retard. It is favorable for the reduction of both, overvoltage and arrester's absorption energy, to lower the force retard speed in the case of bipolar ESOF command.
General Method for Calculating Equivalent Disturbing Current of HVDC Transmission Lines

As a critical part in the DC filter design,it is very important to quickly and correctly calculate the equivalent disturbing current. A general method for calculating the equivalent disturbing current of high voltage direct current(HVDC) transmission lines is proposed. In this approach, one 12-pulse converter was represented by four 3-pulse harmonic voltage sources in series, the DC network was described by a multi-phase coupled transmission line model, and the harmonic currents of certain frequency were solved based on the basic nodal analysis method. The multi-phase coupled transmission line model was described briefly, which could treat DC transmission lines of any structure, e.g. one or two DC circuits in a tower. The harmonic voltage source calculation steps were outlined, the steps to form the nodal admittance matrix were discussed,and the equations to calculate the equivalent disturbing current of the DC line were given. To verify the general applicability of the suggested approach, two different HVDC projects were studied: a traditional single circuit HVDC project, and a newly constructed HVDC project with double circuits on a same tower. The results show that the proposed method can calculate the equivalent disturbing current of the above two projects effectively, and has obvious advantages such as easy implementation, fast calculation and wide applicability. According to the two cases,the distributions of the equivalent disturbing currents along the line have the same trend, i. e.,the maximum value of the equivalent disturbing currents appears at the line inlet of both sides. Plus there is no fixed relationship between the equivalent disturbing currents and the HVDC line structures, because the equivalent disturbing current depends on many factors, such as background harmonics and converter transformer parameters.
北方杂交油葵高产栽培技术

油葵作为中国五大油料作物之一,具有生长期短,适应性广、抗逆性强、丰产性好、出油率及油品品质高等特点。大力发展油葵种植,不仅可以缓解我国食油紧张矛盾,且可充分利用土地资源,大幅度提高农民收入。隆化县地处河北省北部,具有种植油葵的习惯,年种植面积2 000 hm2,多种植在瘠薄、零散地块或与其它矮秆作物间作、套种,平均单产190 kg/667 m2,较种植其它作物增收180元/667 m~2以上,现将其栽培技术介绍如下:
遵义部分主推玉米品种产量及其相关性状分析

运用裂区设计,研究了遵义地区部分主推玉米品种的产量及其相关性状。结果表明:适当提高玉米生产上推广的密度,有利于产量的提高;通过相关分析,得到相关系数的大小为穗长、行粒数、穗行数、穗上叶、秃尖、穗粗、穗位高、千粒重、茎粗、株高;通径分析得到直接通径系数的大小顺序为穗行数、行粒数、穗位高、株高、穗长、千粒重、穗粗、秃尖、穗上叶、茎粗。综合考虑:适当的增加密度并兼顾其他农艺性状是提高遵义地区玉米产量的有效途径。
矮败小麦研究进展及其在安徽的应用

介绍了矮败小麦的创制过程和四大优点,以及矮败小麦在远缘杂交、杂交育种、轮回选择等方面的研究进展,同时介绍了安徽省矮败小麦与等离子诱变相结合的育种技术体系和成果,并对矮败小麦的未来发展趋势进行了展望。
贵州省黎平县楠竹林场乐昌含笑群落研究

以黎平县楠竹林场天然乐昌含笑群落为调查研究对象,分析了群落的物种组成、外貌特征和结构特征,定量计测了乔木层主要树种的群落特征指标。结果表明,黎平县楠竹林场天然乐昌含笑群落植物共有24科38属43种;垂直结构明显,分为乔木层、灌木层、草本层,乔木层的物种多样性指数较高,物种丰富;乐昌含笑在群落中处于优势种地位;群落结构趋于稳定。
小麦杂交种衡杂102丰产性节水性鉴定及分析

通过化学杀雄配制出杂交种衡杂102,表现出较好的高产性、节水性及适应性。水处理单位面积穗数、穗粒数超标优势为5.77%和3.97%,均达0.05显著水平;千粒重、产量超标优势为9.36%和12.21%,达0.01极显著水平。节水处理平均产量482.44 kg/667 m2,比对照增产8.29%,名列30个参试品种第1名。通过杂种优势利用,可以选育出高产、节水的小麦杂交种。
氢化物发生-原子荧光光谱法测定化探样品中痕量锡

锡在钨钼矿石中是最常见的伴生有益元素。目前测定该矿石中锡的方法主要有碘量法、分光光度法和极谱法等。碘量法和分光光度法存在锡的干扰元素较多,终点难辨的缺点;极谱法灵敏度较高,但操作条件要求严格,各实验室现行操作手续差异较大,且对操作人员且环境危害较大,应减少使用。近十年来,氢化物发生与原子荧光光谱法联用使其成为一种具有较大实用价值的分析技术.本工作以化探样品为研究对象,通过对其碱熔、热水提取,过夜澄清,在酸性介质中以盐酸(5+95)溶液为载流,在样品中加入一定量的碘化钾溶液后用氢化物发生-原子荧光光谱法测定化探样品中锡的含量。
依托“十二?五”项目研发我国的心血管疾病数据标准

“心血管病关键技术临床多中心研究信息平台”项目将以上述国际标准为基础,研发适于在心血管领域使用的、国内外通用’的数据定义、分析、传输及共享交换标准。一方面考虑与国际标准的统一,根据统一的标准和规范建立数据库;另一方面,又要考虑分布在不同的系统、地域或平台上的数据有良好的兼容性和集成性,最终实现资源共享的网络体系结构,以系统合作为指导,建立分散互联的协作网络,根据统一的标准或规范,依托网络实现信息资源的共享和利用。
南京某基层医院内分泌科住院患者营养状况调查

内分泌科的住院患者中营养风险和营养不良普遍存在,营养不良增加了糖尿病患者感染、褥疮或溃疡的发生机会并难以控制。2002年欧洲肠外肠内营养学会(ESPEN)将营养风险筛选(NRS)推荐为住院患者适用的营养不良评定方法。中华医学会肠外肠内营养学分会推荐使用NRS 2002作为营养筛查工具。本调查旨在评估NRS 2002在基层医院内分泌科的适用性,并联合前白蛋白和淋巴细胞计数观察住院患者营养风险的发生率。
Neutral-point voltage control for a three-level DC-AC inverter using equivalent-input-disturbance approach

One problem with a single source three-level inverter is the drafting of its neutral-point voltage. This may occur during transition or when unbalanced loads are connected to the inverter system. Wiation of neutral-point voltage may greatly deteriorate the power quality. In this paper, we employ an equivalent-input-disturbance approach to deal with this problem. By adding an extra neutral leg, the control problem of neutral-point voltage is converted to a disturbance rejection problem. This method suppresses the variation of the neutral-point voltage to a low level and reduces the capacity of DC-link capacitors. Simulation results show the effectiveness of the method.
Thera-Band渐进抗阻系统结合针刺、推拿治疗慢性非特异性腰痛的疗效观察

目的:探讨Thera-Band渐进抗阻系统核心肌群稳定训练结合针刺、推拿治疗腰痛的疗效。方法:100例慢性非特异性腰痛患者随机分为对照组、治疗组,两组患者均接受常规针刺、推拿治疗,治疗组同时接受Thera-Band渐进抗阻系统核心肌群稳定训练治疗。两组患者均治疗3周,随访半年。治疗前后对两组患者均进行视觉模拟评分(VAS)和JOA下腰痛评价表评定。结果:治疗3周后,两组患者的VAS和JOA下腰痛评价表差异较治疗前均有显著性意义(P<0.05),但治疗组效果较对照组更加显著(P<0.05),随访半年,治疗组VAS和JOA下腰痛评分明显优于对照组(P<0.05)。结论:Thera-Band渐进抗阻系统核心肌群稳定训练结合针刺、推拿对慢性腰痛患者的恢复有较好的长期疗效和预防作用。
Evaluation of PCDD/Fs and metals emission from a circulating fluidized bed incinerator co-combusting sewage sludge with coal

The emission characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and heavy metals were evaluated during co-combustion of sewage sludge with coal from a circulating fluidized bed incinerator. The stack gas, slag and fly ash samples were sampled and analyzed. The gas-cleaning system consisted of electrostatic precipitators and a semi-dry scrubber. Results showed that the stack gas and fly ash exhibited mean dioxin levels of 9.4 pg I-TEQ/Nm~3 and 11.65 pg I-TEQ/g, respectively, and showed great similarities in congener profiles. By contrast, the slag presented a mean dioxin level of 0.15 pg I-TEQ/g and a remarkable difference in congener profiles compared with those of the stack gas and fly ash. Co-combusting sewage sludge with coal was able to reduce PCDD/Fs emissions significantly in comparison with sewage sludge mono-combustion. The leaching levels of Hg, Pb, Cd, Ni, Cr, Cu, and As in the fly ash and slag were much lower than the limits of the environmental protection standard in China. These suggest that the co-combustion of sewage sludge and coal is an advisable treatment method from an environmental perspective.
Carbon dioxide capture using polyethylenimine-loaded mesoporous carbons

A high efficiency sorbent for CO_2 capture was developed by loading polyethylenimine (PEI) on mesoporous carbons which possessed well-developed mesoporous structures and large pore volume. The physicochemical properties of the sorbent were characterized by N_2 adsorption/desorption, scanning electron microscopy (SEM), thermal gravimetric analysis (TG) and Fourier transform infrared spectroscopy (FT-IR) techniques followed by testing for CO_2 capture. Factors that affected the sorption capacity of the sorbent were studied. The sorbent exhibited extraordinary capture capacity with CO_2 concentration ranging from 5% to 80%. The optimal PEI loading was determined to be 65 wt.% with a CO_2 sorption capacity of 4.82 mmol-CO_2/g-sorbent in 15% CO_2/N_2 at 75°C, owing to low mass-transfer resistance and a high utilization ratio of the amine compound (63%). Moisture had a promoting effect on the sorption separation of CO_2. In addition, the developed sorbent could be regenerated easily at 100°C, and it exhibited excellent regenerability and stability. These results indicate that this PEI-loaded mesoporous carbon sorbent should have a good potential for CO_2 capture in the future.
In vitro cytotoxicity of CdSe/ZnS quantum dots with different surface coatings to human keratinocytes HaCaT cells

Quantum dots (QD) nanoparticles have been widely used in biomedical and electronics fields, because of their novel optical properties. Consequently it confers enormous potential for human exposure and environmental release. To increase the biocompatibility of QDs, a variety of surface coatings or functional groups are added to increase their bioactivity and water solubility. Human adult low calcium high temperature (HaCaT) cells are the epithelial cells derived from adult human skin that exhibits normal differentiation capacity and a DNA fingerprint pattern that is unaffected by long-term cultivation, transformation, or the presence of multiple chromosomal alternations. Human keratinocytes, HaCaT cells were used to systematically evaluate the cytotoxicity of biocompatible QD made of CdSe metal core and ZnS shell with three different coatings and at three different wavelengths (530, 580 and 620 nm). In terms of halfmaximal inhibitory concentration, QSA-QDs with amine-polyethyleneglycol coating and QSH-QDs with amphiphilic polymer coating were not cytotoxic, while QEI-QDs with polyethylenimine coating were highly toxic to the HaCaT cells in comparison to a reference CuInS2/ZnS. QEI-QDs led to significant increase in reactive oxygen species, decrease in mitochondrial membrane potential and DNA damage in HaCaT cells. The mechanisms of toxicity of QEI-530 and QEI-580 can be attributed to the combination of intracellular reactive oxygen species production and loss of MMP. The QDs toxicity can be attributed to the polyethylemimine surface coating which was highly toxic to cells in comparison with amine-polyethyleneglycol, but not due to the release of cadmium ions.
Influence of oxygen flow rate and compost addition on reduction of organic matter in aerated waste layer containing mainly incineration residue

Landfilling municipal solid waste incineration (MSWI) residue alkalizes the waste layer, causing a subsequent decrease in microbial activity and a delay in the decomposition of organic matter. In this study, efficiencies of neutralization of the leachate and organic matter decomposition in the waste layer in a column filled with MSWI residue using aeration and compost addition were evaluated. Total organic carbon (TOC) reduction in the waste layer is large at high oxygen flow rate (OFR). To effectively accelerate TOC reduction in the waste layer to which compost was added, a high OFR exceeding that by natural ventilation was required. At day 65, the pH of the leachate when OFR was above 10~2 mol-O_2/(day·m~3) was lower than that when OFR was below 10~1 mol-O_2/(day·m~3). At the same OFR, the pH of waste sample was lower than that of waste sample with compost. Although leachate neutralization could be affected by compost addition, TOC reduction in the waste layer became rather small. It is possible that humic substances in compost prevent the decomposition of TOC in MSWI residue.
Role of Western Pacific Oceanic Variability in the Onset of the Bay of Bengal Summer Monsoon

The influence of the tropical Indo-Pacific Ocean heat content on the onset of the Bay of Bengal summer monsoon (BOBSM) onset was investigated using atmospheric data from the NCEP and ocean subsurface temperature data from the Japan Metorology Agency (JMA). Results showed that the onset time of the BOBSM is highly related to the tropical Pacific upper ocean heat content (HC), especially in the key region of the western Pacific warm pool (WPWP), during the preceding winter and spring. When the HC anomalies in the WPWP are positive (negative), the onset of the BOBSM is usually early (late). Accompanied by the variation of the convection activity over the WPWP, mainly induced by the underlying ocean temperature anomalies, the Walker circulation becomes stronger or weaker. This enhances or weakens the westerly over the tropical Indian Ocean flowing into the BOB in the boreal spring, which is essential to BOBSM onset. The possible mechanism of influence of cyclonic/anti-cyclonic circulation over the northwestern tropical Pacific on BOBSM onset is also discussed.
Intraseasonal Oscillation in Global Ocean Temperature Inferred from Argo

The intraseasonal oscillation (ISO; 14–97-day periods) of temperature in the upper 2000 m of the global ocean was studied based on Argo observations from 2003–2008. It is shown that near the surface the ISO existed mainly in a band east of 60?E, between 10?S and 10?N, and the region around the Antarctic Circumpolar Current (ACC). At other levels analyzed, the ISOs also existed in the regions of the Kuroshio, the Gulf Stream, the Indonesian throughflow, the Somalia current, and the subtropical countercurrent (STCC) of the North Pacific. The intraseasonal signals can be seen even at depths of about 2000 m in some regions of the global ocean. The largest amplitude of ISO appeared at the thermocline of the equatorial Pacific, Atlantic and Indian Ocean, with maximum standard deviation (STD) exceeding 1.2?C. The ACC, the Kuroshio, and the Gulf Stream regions all exhibited large STD for all levels analyzed. Especially at 1000 m, the largest STD appeared in the south and southeast of South Africa—a part of the ACC, with a maximum value that reached 0.5?C. The ratios of the intraseasonal temperature variance to the total variance at 1000 m and at the equator indicated that, in a considerable part of the global deep ocean, the ISO was dominant in the variations of temperature, since such a ratio exceeded even 50% there. A case study also confirmed the existence of the ISO in the deep ocean. These results provide useful information for the design of field observations in the global ocean. Analysis and discussion are also given for the mechanism of the ISO.
Transition of Zonal Asymmetry of the Arctic Oscillation and the Antarctic Oscillation at the End of 1970s

In this study, the interdecadal changes in the zonal symmetry of both Arctic Oscillation (AO) and Antarctic Oscillation (AAO) were analyzed. To describe the zonal asymmetry, a local index of AO and AAO was defined using the normalized sea level pressure (SLP) differences between 40? and 65? (latitudes) in both hemispheres. The zonal covariability of local AO and AAO can well represent the zonal symmetry of AO and AAO. Results show that the zonal asymmetry of both AO and AAO significantly changed in the late 1970s. AO was less asymmetric in the zonal direction in the boreal winter season during the latter period, while in the boreal summer it became more asymmetric after 1979. The zonal symmetry of AAO in both austral summer and winter has also significantly decreased since the late 1970s. These changes may imply interdecadal transition in the atmospheric circulation at middle and high latitudes, which is of vital importance to understanding climate variability and predictability across the globe, including the African–Asian–Australian monsoon regions.
Variation in vegetation greenness in spring across eastern China during 1982–2006

Vegetation greenness is a key indicator of terrestrial vegetation activity. To understand the variation in vegetation activity in spring across eastern China (EC), we analysed the variation in the Normalised Difference Vegetation Index (NDVI) from April to May during 1982–2006. The regional mean NDVI across EC increased at the rate of 0.02/10yr (r~2=0.28; p=0.024) prior to 1998; the increase ceased, and the NDVI dropped to a low level thereafter. However, the processes of variation in the NDVI were different from one region to another. In the North China Plain, a cultivated area, the NDVI increased (0.03/10yr; r~2=0.52; p<0.001) from 1982 to 2006. In contrast, the NDVI decreased (–0.02/10yr; r~2=0.24; p=0.014) consecutively from 1982 to 2006 in the Yangtze River and Pearl River deltas, two regions of rapid urbanisation. In the eastern region of the Inner Mongolian Plateau and the lower reaches of the Yangtze River in East China, the NDVI increased prior to 1998 and decreased thereafter. In the Hulun Buir area and the southern part of the Yangtze River Basin, the NDVI increased prior to 1998 and remained static thereafter. The NDVI in the grasslands and croplands in the semi-humid and semi-arid areas showed a significant positive correlation with precipitation, while the NDVI in the woodlands in the humid to semi-humid areas showed a significant positive correlation with temperature. As much as 60% of the variation in the NDVI was explained by either precipitation or temperature.
D19S433等位基因“丢失”1例

D19S433基因座染色体定位19q12~13.1,该基因座含有较多的2bp插入等位基因,迄今已检出17个等位基因~([1]),该基因座核心序列长度为36~80个碱基。在本案例中,采用Identifiler系统和Goldeneye 20ADNA身份系统检测,母亲样本的分型均为纯合子16.2,D19S433基因座的片段长度均在150 bp以下。由于王某等位基因14在下游引物结合区3’端第9个碱基位置有一个G到C的突变,距离核心序列只有18个碱基,导致扩增片段较短的引物与模板DNA的结合发生障碍,因此出现了等位基因的丢失。有文献~[2]报道,使用STR试剂盒检验时,有可能出现等位基因“丢失”现象,这是由于模板DNA在引物结合处的3'端附近存在碱基突变或插入/缺失,PCR扩增中相应引物无法退火所致,这与本案例的研究结果完全一致。
无脾综合征伴复杂心脏畸形尸检1例

AS一股具有以下病理学特点:先天性脾缺如、内脏位置异常以及心血管畸形。本例合并右位心、两腔心极其罕见,根据临床病理分型,右位心分为镜影型(I)、右旋型(Ⅱ)、复合型(Ⅲ、Ⅳ),本例属于右位心中的Ⅱ型,房室排列仍正常,但心室旋转,使得左心室转至右心室的下方,伴大血管移位、室间隔缺损等。两腔心发病率很低,根据Van Praagh的分段诊断法将两腔心(即单心室)分成四型,仅有左心室型(A)、仅有右心室型(B)、室间隔缺如型(C)、仅有漏斗部型(D)。本例心耳均成右心耳型,房室瓣融合,残留漏斗部,单心室呈左心室型,故属于两腔心D型~([3-5])。本例还发现甲状腺发育不良,推测可能与AS的发生有关。