The effect of spherical aberration on temperature distribution inside glass by irradiation of a high repetition rate femtosecond pulse laser

In this paper, we study the effect of spherical aberrations on the light intensity and the temperature distribution in the focal region in a 250-kHz femtosecond laser irradiated Ag^＋-doped borosilicate glass. When a focused beam goes through an interface between air and glass, spherical aberration will result in the separation of the focal point and then cause a clear change of the light intensity distribution along the incident direction. That phenomenon will further influence the longitudinal cross-section temperature distribution in glass. Here we use Ag nanoparticle formation as a marker for establishing temperature distribution and we find that the formation of nanoparticle shows a strong dependence on the temperature field and the detailed precipitation process is also discussed.

Effects of Heat Stress during Seed Filling Stage on Brassica napus Seed Oil Accumulation and Chlorophyll Fluorescence Characteristics

As global temperature rise,the threat of heat stress to rapeseed production is becoming more obvious.Exploring the response characteristics of two important biological pathways,oil accumulation and photosynthesis,to heat stress during B.napus seed filling is helpful in the genetic improvement of heat-tolerant rapeseed.The effects of heat stress on seed oil accumulation and chlorophyll fluorescence characteristics of 29 B.napus germplasms with different oil content and environmental sensitivity,including 6 rapeseed varieties which exhibited environmentsensitive/insensitive and with high,medium or low oil content,were tested by whole plant heat stress or the in vitro silique culture system.Both assay exhibited similar trend on oil content of the rapeseed germplasms.The heat effect on the chlorophyll fluorescence kinetic parameters F_(v)/F_(m),ETR and Y(Ⅱ)were also consistent.Heat stress significantly decreased oil content,although there was abundant genetic variation on heat tolerance among the genotypes.Correlation analysis showed that the decrease rate of F_(v)/F_(m) of silique heat-stressed B.napus developing seed was positive correlative to the decrease rate of mature seed oil content of the whole plant heat-stressed rapeseed(R=0.9214,P-value<0.01).Overall,the results indicated that heat stress inhibited oil accumulation and photosynthesis in B.napus developing seed.The decrease rate of chlorophyll fluorescence parameter F_(v)/F_(m) of heat-stressed developing seed could be used as the index of heat tolerant rapeseed identification.Further,two heat insensitive rapeseed varieties with high oil content were identified.

Some Aspects of the Analysis during Heating Plastic Tunnel by the Use of Heat from Stone Accumulator

The paper presents the results of research which showed the energy effects when used in foil tunnel heat accumulator. The study was conducted in two tunnels （with and without heat accumulator） and two cycles of growing cucumbers, i.e., in the cultivation of spring and autumn. The heat accumulator is divided into three segments of varying capacity coal deposits （porphyry-type stones）. During the test crops （cucumbers） measured parameters associated with the surrounding climate, microclimate parameters inside the building and parameters of the injected and flowing out air from the accumulator have been monitored and archived by a computer system. The intensity of solar radiation, the technology of cultivation and cultivated species of plants were the same in both the tunnel with heat accumulator as well as the control object. On the basis of the balance of behavior, the heat and mass are described occurring processes related to the exchange of air during ventilation facility. The resulting effects were converted into differences in heat demand between the tunnel and the tunnel with an accumulator of heat. It was found that despite the increase ventilation in adopted arbitrary surface of the foil tunnel, the scope of changes in the amount of heat saved in one of the cultivation is in the range from 0.0015 GJ to over 1.4 GJ of heat.

吴志洲辨证论治尿石症经验

尿石症病因病机为下焦湿热、肾气虚弱或病久血瘀等,病位在肾与膀胱,其形成过程复杂,往往虚实夹杂,为本虚标实之证。本病的“实”一般包括湿热、气滞和血瘀,“虚”一般是指肾阴虚、肾阳虚或气血两虚。吴志洲教授临证强调结合病程,常把尿石症辨证分为三型进行论治:湿热蕴结证、气血瘀滞证、肾气不足证。尿石症初期病位在肾与膀胱等贮存尿液的器官,尿石症的治疗当重视利尿,吴教授在这个阶段以清热利湿、通淋排石为法,常以张仲景的五苓散或猪苓汤作为基本方施治,观其舌苔脉象,随症加减,或配以清热之品,或参以滋阴之药,或佐以活血化瘀药配合治之,常用药物有金钱草、猪苓、茯苓、白茅根、小蓟、泽泻、泽兰、车前子、阿胶、滑石等。吴教授临证用药注意顾护肾气、做到消中寓补、标本兼施,方选知柏地黄丸,金匮肾气丸等,还要注重健脾和养肺,分别采用健脾化湿、清养肺金等法,常以参苓白术散、补肺汤等合方共治。吴教授临证治疗尿石症,注重通调气血,无论有无瘀血征象,均可在补肾利尿化石排石的基础上,佐以通调气血以加强祛石或化石作用。一是可以加大疏散溶解结石之力,二是可以松解结石与组织间的粘连,有利于结石的排出与消散。方选逍遥散、桂枝茯苓丸、血府逐瘀汤等。此外,吴教授还提倡辨病辨证应与现代医学相结合,重用单味化石排石药物,临证常大剂量应用,如黄芪、金钱草、海金沙、鸡内金等。

五老山隧道掌子面积热分析及降温技术研究

长距离独头施工形成的掌子面处易积热,影响施工人员的作业环境。以五老山隧道掌子面处温度为研究对象,探究隧道内热源的形成,利用数值模拟软件,分析特长隧道在正常通风和增设局部降温措施下的温度场分布。结果表明:掌子面处高温的主要来源为机械散热;机械送风可以在一定程度上抑制掌子面高温,但当独头施工长度超过一定距离后,通风已无法有效降低温度;采用局部降温措施,如采用片冰融化的冷水,并在隧道侧壁喷雾,可将温度控制在理想范围内。采用综合降温措施后施工温度控制良好。

泻心导赤散加味联合西药治疗心脾积热型复发性口腔溃疡临床研究

目的:观察泻心导赤散加味联合西药治疗心脾积热型复发性口腔溃疡(ROU)的临床疗效。方法:采用随机数字表法将2020年6月—2023年4月玉环海成口腔门诊部收治的82例心脾积热型ROU患者分为观察组与对照组各41例。对照组给予常规西药治疗,观察组在对照组基础上加用泻心导赤散加味治疗。2组均连续治疗2周。比较2组治疗前后中医证候评分、视觉模拟评分法(VAS)评分、溃疡直径、免疫功能指标以及血清肿瘤坏死因子(TNF)-α和白细胞介素(IL)-6水平,评估2组临床疗效、疾病复发情况。结果:治疗后,观察组总有效率高于对照组(P<0.05)。治疗后,2组中医证候评分、VAS评分、溃疡直径及CD8^(+)、TNF-α和IL-6水平均较治疗前降低,CD3^(+)、CD4^(+)水平升高(P<0.05),且观察组中医证候评分、VAS评分、溃疡直径及CD8^(+)、TNF-α和IL-6水平低于对照组,CD3^(+)、CD4^(+)水平高于对照组(P<0.05)。观察组疾病复发率4.76%(1/21),低于对照组42.86%(6/14)(P<0.05)。结论:泻心导赤散加味联合西药治疗心脾积热型ROU疗效确切,能够减轻患者疼痛,提高免疫功能,降低炎症反应及疾病复发率。

Numerical simulation on thermal accumulation of cemented tailings backfill

Based on the collaborative exploitation of deep mineral resources and geothermal resources, the thermal accumulation process of cemented tailings backfill(CTB) was studied by numerical simulation. The effects of thermal accumulation time, slurry proportions and temperature conditions on the thermal accumulation of backfill are analyzed, the influence of the heat conduction between backfill and surrounding rock, the heat convection between backfill and airflow on thermal accumulation were compared simultaneously. The results show that the total thermal accumulation capacity increases by approximately 85% within 10-90 d. The influence of surrounding rock temperature and initial temperature on total thermal accumulation capacity is more significant and it is approximately 2 times of the influence of slurry proportions under the conditions of this study. It is clear that the rise of surrounding rock temperature and the decrease of initial temperature can improve the thermal accumulation capacity more effectively. Moreover, the heat conduction accounts for a considerable proportion in the process of thermal accumulation, the average heat conduction capacity is approximately 25 times of the heat convection capacity. This study can provide the theoretical basis and application reference for the optimization of thermal accumulation process of CTB in the exploitation of geothermal resources.

Effect of inter-cycle heat treatment in accumulative roll-bonding(ARB)process on planar isotropy of mechanical properties of AA1050 sheets

The accumulative roll-bonding(ARB)process was applied on the strips of aluminum alloy 1050 in two processing conditions:cold ARB and warm ARB.The results of tensile tests and microhardness measurement show that the warm ARB process exhibits the lower tensile strength and microhardness,more homogeneous distribution of the microhardness,higher elongation,and especially superior planar isotropy of the tensile properties in comparison to the cold ARB,because of the intermediate heat treatment as well as the elevated temperature rolling in the warm ARB process.Furthermore,with increasing the cycles of both processes,the planar isotropy decreases progressively.

A Study of the Accompanying Relationships between Uranium and Oil

It is not occasional that uranium deposits and oil accumulation occur in the same depression in the Erlian basin, Inner Mongolia. Some evidences show certain relations between uranium and oil in origin. This paper discusses and analyses the evidence for the relations between uranium deposits and oil and gas accumulation in terms of spatial distribution, geology, hydrochemistry and geochemistry. The paper also deals with the mechanism of the formation of uranium deposits and points out that it is of significance to use uranium as an indicator to search for oil and vice versa.

Study on heat efficiency of laser-TIG double-side welding

A series of laser-TIG double-side welding experiments for aluminum alloys were carried out to investigate the heat efficiency of the process. The melting efficiency was introduced to evaluate quantitatively the degree of the mutual effect of the laser and the arc. The results showed that the melting efficiency of laser-TIG double-side welding exceeded the sum of the laser and the arc taken separately. With the increase of heat input, the weld depth and melting efficiency of the laser and the arc were increased signifwantly. This, in fact, implies the strong mutual effect of the laser and the arc as heat sources joined simultaneously in the process. Comparatively, the higher efficiency of the laser constituent of heat sources plays the main role in the increase of the process efficiency. The phenomena of arc column convergence, increased laser absorptivity and the formation of heat accumulation region are the causes of the improvement of heat efficiency.

A Cogeneration System for an Apartment Building Based on Distributed Heat Storage Technology

In order for economically viable distributed generation systems for apartment buildings to spread, it is essential to develop an efficient and low-cost heat supply system. We have developed a new eogeneration system called the Neighboring Cogeneration system （NCG）. The key concept of this system is to install a heat accumulator with a hot water supply and a room heating function at each household and to connect different households by a single loop of hot water pipe. As a result, time leveling of the heat supply and heat transferring among households becomes possible. Thus, the costs of the pipe and the heat source equipment decrease. Furthermore, because all of the heat accumulators store heat, the total heat storage capacity is large enough for cogeneration to generate exhaust heat according to the electricity demand and with a high operating rate. In this paper, we report the results of the NCG system for 7 lived-in households. The controlling system worked efficiently. All of the households were able to use hot water without any difficulties. Further, we report the results of the energy saving effect of the NCG system for 50 lived-in households by means of a simulation based on the experimental results for NEXT21.

Performance Evaluation Methods for Multi-stream Plate-Fin Heat Exchanger

Mathematical model of cross type multi-stream plate-fin heat exchanger is established.Meanwhile,mean square error of accumulative heat load is normalized by dimensionless,and the equations of temperature-difference uniformity factor are improved.Evaluation factors above and performance of heat exchanger are compared and analyzed by taking aircraft three-stream condenser as an example.The results demonstrate that the mean square error of accumulative heat load is common result of total heat load and excess heat load between passages.So it can be influenced by passage arrangement,flow inlet parameters as well as flow patterns.Dimensionless parameter of mean square error of accumulative heat load can reflect the influence of passage arrangement to heat exchange performance and will not change dramatically with the variation of flow inlet parameters and flow patterns.Temperature-difference uniformity factor is influenced by passage arrangement and flow patterns.It remains basically unchanged under a certain range of flow inlet parameters.

Optimal Control of a Thermoelectric Generator Attached with a Latent Heat Accumulator

Generally MPPT control (maximum power point tracking) is adopted to control of a thermoelectric generator. However, in the case of generation by use of a heat accumulator MPPT control cannot obtain maximum whole electrical output during the operation period. This is because the amount of heat stored in a heat accumulator is limited and easy to be exhausted rapidly by MPPT. Therefore MEPT (Maximum Efficiency Point Tracking) control should be developed to obtain maximum power from limited heat stored in the heat accumulator. When thermoelectric generator is used for waste heat recovery, conversion efficiency is quite difficult to be measured. This is due to time delay between the change of temperature profile in the thermoelectric generator and the change of heat medium temperature. Decrease of output current is desired to enlarge output because decrease of current decreases Peltier heat and improves efficiency of heat recovery. The experimental results indicate that current fluctuated by MPPT control causes loss of power output. We proposed the optimal control in which current is 10% smaller than one of MPPT control and evaluated it experimentally. We call this control scheme MEPT control. In this evaluation 500 W class thermoelectric generator, latent heat accumulator and the test facilities included 30 kW electric heater are utilized. Experimental result shows MEPT control exceeds MPPT in total electricity recovered from heat accumulator.

Modeling the effects of extreme high-temperature stress at anthesis and grain filling on grain protein in winter wheat

Extreme high-temperature stress(HTS) associated with climate change poses potential threats to wheat grain yield and quality. Wheat grain protein concentration(GPC) is a determinant of wheat quality for human nutrition and is often neglected in attempts to assess climate change impacts on wheat production. Crop models are useful tools for quantification of temperature impacts on grain yield and quality.Current crop models either cannot simulate or can simulate only partially the effects of HTS on crop N dynamics and grain N accumulation. There is a paucity of observational data on crop N and grain quality collected under systematic HTS scenarios to develop algorithms for model improvement as well as evaluate crop models. Two-year phytotron experiments were conducted with two wheat cultivars under HTS at anthesis, grain filling, and both stages. HTS significantly reduced total aboveground N and increased the rate of grain N accumulation, while total aboveground N and the rate of grain N accumulation were more sensitive to HTS at anthesis than at grain filling. The observed relationships between total aboveground N, rate of grain N accumulation, and HTS were quantified and incorporated into the WheatGrow model. The new HTS routines improved simulation of the dynamics of total aboveground N, grain N accumulation, and GPC by the model. The improved model provided better estimates of total aboveground N, grain N accumulation, and GPC under HTS(the normalized root mean square error was reduced by 40%, 85%, and 80%, respectively) than the original WheatGrow model. The improvements in the model enhance its applicability to the assessment of climate change effects on wheat grain quality by reducing the uncertainties of simulating N dynamics and grain quality under HTS.

Variation Characteristics of Heat Resources in Liaoning Province, China in Recent 60 Years and Their Impact on Meteorological Services

To study the temporal and spatial changes of heat resources to serve agricultural production and economic development. The climate data from 1958 to 2017 were selected, and the temporal and spatial changes of heat resources in Liaoning, China were analyzed by using the method of climate diagnosis and analysis. The results show that: the southern coastal area of Liaoning has the most heat resources, the northwestern hilly area and the eastern mountainous area the least, and the central plain area in the middle distribution pattern;compared with 1958-1980, 1981-2017 ≥0&#176;C, ≥10&#176;C accumulated temperature, etc. The value line is advanced 100-160km northward. The accumulated temperature of ≥0&#176;C and ≥10&#176;C in Liaoning experienced abrupt changes in climate in 1993 and 1994, and the climate abrupt change in the southern coastal area was earlier than that in the inland. , the increase in the northwestern hilly area and the eastern mountainous area is less than that in the central plain area and the southern coastal area. The study on the impact on meteorological services found that the increase or decrease of heat resources has a significant impact on agro-meteorological services, which can prolong the growing season of crops, relatively reduce the damage of frost, improve comprehensive utilization of land, and increase crop yields;at the same time, with the increase of heat resources and the northward expansion of the isoline of accumulated temperature, the area affected by pests and diseases has expanded, which has aggravated the harm to agriculture economic burden.

新型乌蔹莓水凝胶对湿热蕴结型痛风性关节炎的干预效果

目的探讨新型乌蔹莓水凝胶对湿热蕴结型痛风性关节炎的干预效果及作用机制。方法选取90例符合痛风性关节炎西医诊断标准、中医辨证属湿热蕴结证的患者作为研究对象,随机分成治疗组、对照组和空白组,每组30例。空白组仅采用依托考昔治疗,对照组采用依托考昔联合乌蔹莓膏治疗,治疗组采用依托考昔联合外敷乌蔹莓水凝胶治疗。比较3组临床疗效、症状改善时间、安全性、舒适性和治疗前后中医证候积分、血清炎性因子[C反应蛋白(CRP)、肿瘤坏死因子-α(TNF-α)、血沉(ESR)]、NF-κB信号通路相关蛋白、疼痛视觉模拟评分法(VAS)评分、关节活动度变化情况。结果治疗组、对照组治疗总有效率分别为93.33%、90.00%,高于空白组的70.00%,差异有统计学意义(P<0.05);治疗组疼痛、红肿、压痛、关节活动受限症状改善的时间短于对照组、空白组,差异有统计学意义(P<0.05);治疗7 d后,治疗组中医证候积分低于对照组、空白组,治疗组、对照组血清CRP、TNF-α、ESR水平和NF-κB信号通路相关蛋白P50、P65表达低于空白组,差异有统计学意义(P<0.05);治疗组治疗7 d后VAS评分低于对照组、空白组,且治疗组用药舒适度评分高于对照组,差异有统计学意义(P<0.05);3组不良反应发生率比较,差异无统计学意义(P>0.05)。结论乌蔹莓水凝胶对痛风性关节炎的治疗效果优于乌蔹莓膏,其作用机制可能与调控NF-κB通路、抑制炎性因子表达有关,且水凝胶使用方便卫生,舒适性高,有望成为安全、有效、便捷的痛风性关节炎外敷中药。

塔河油田下寒武统烃源岩生排烃史差异演化及成藏效应

针对塔河奥陶系油藏多相态油气富集主控因素认识不清的问题,采用盆地模拟技术再现了塔河油田下寒武统烃源岩热演化史、生烃史及典型剖面油气运聚过程。研究表明:塔河地区下寒武统烃源岩从加里东早期进入成熟阶段,目前处于高成熟—湿气阶段,发育断续埋藏、持续埋藏和长期浅埋藏3种热演化模式,分别对应油气并举双峰型、油强气弱型、单峰型3种生烃模式。烃源岩热演化差异致使奥陶系油气发育多期充注、垂向疏导、侧向调整改造的演化历史,油气相态呈现轻质油藏—中质油藏—重质油藏的有序分布格局。塔河地区不同构造带下寒武统烃源岩热演化具有由北西向南东递增的趋势,与油气相态差异呈现明显的正相关性,体现出“源控”特征,喜山期控制了现今油气藏分布。研究发现,塔河油田盐下、托甫台生烃强度高,喜山期生烃总量相对较大,可作为下一步勘探开发的有利区。研究结果对塔河油田深层油气资源和目标评价有一定指导意义。

Partial-SOI high voltage P-channel LDMOS with interface accumulation holes

A new partial SOI （silion-on-insulator） （PSOI） high voltage P-channel LDMOS （lateral double-diffused metal-oxide semiconductor） with an interface hole islands （HI） layer is proposed and its breakdown characteristics are investigated theoretically. A high concentration of charges accumulate on the interface, whose density changes with the negative drain voltage, which increase the electric field （Er） in the dielectric buried oxide layer （BOX） and modulate the electric field in drift region . This results in the enhancement of the breakdown voltage （BV）. The values of E1 and BV of an HI PSOI with a 2-~m thick SOI layer over a 1-~tm thick buried layer are 580V/~m and -582 V, respectively, compared with 81.5 V/p.m and -123 V of a conventional PSOI. Furthermore, the Si window also alleviates the self-heating effect （SHE）. Moreover, in comparison with the conventional device, the proposed device exhibits low on-resistance.

清热利湿逐水加减方治疗湿热蕴结证肝硬化腹水患者的临床疗效及安全性

目的观察清热利湿逐水加减方治疗湿热蕴结证肝硬化腹水患者的临床效果及安全性。方法选取2020年1月—2023年5月期间石家庄市中医院收治的86例肝硬化腹水患者,依据简单随机数字表法分为对照组和研究组,每组各43例。对照组采取常规治疗,研究组在对照组基础上采取清热利湿逐水加减方,均治疗4周。观察比较两组患者治疗前后中医证候积分、机体状况(腹水深度、24 h平均尿量、腹围、空腹体质量)、肝功能指标[总胆红素(Total bilirubin,TBil)、谷氨酰转肽酶(Glutamyltranspeptidase,GGT)、天冬氨酸氨基转移酶(Aspartate aminotransferase,AST)、丙氨酸氨基转移酶(Alanine aminotransferase,ALT)]水平,比较治疗后临床疗效及不良反应发生率。结果治疗后研究组临床总有效率93.02%(40/43)明显高于对照组76.74%(33/43),差异有统计学意义(P<0.05)。治疗后两组患者脘腹胀急、腹大坚满及大便秘结、小便赤涩、渴不欲饮、烦热口苦、身目发黄分值均较治疗前降低,差异有统计学意义(P<0.05);且研究组中医证候积分低于对照组,差异有统计学意义(P<0.05)。治疗后两组患者腹水深度、腹围、空腹体重较治疗前降低,24 h平均尿量较治疗前增多,差异有统计学意义(P<0.05);且研究组腹水深度、腹围、空腹体质量低于对照组,24 h平均尿量多于对照组,差异有统计学意义(P<0.05)。治疗后两组患者TBIL、GGT、AST、ALT水平较治疗前降低,差异有统计学意义(P<0.05);且研究组肝功能低于对照组,差异有统计学意义(P<0.05)。治疗后研究组不良反应发生率11.63%(5/43)与对照组6.98%(3/43)比较,差异无统计学意义(P>0.05)。结论采取清热利湿逐水加减方治疗肝硬化腹水湿热蕴结证可有效缓解临床症状,减少腹水,改善机体状况与肝功能,提升疾病治疗效果,且具有安全性。

华北赋煤区地热资源富集模式及开发利用方向

【目的】中国是煤炭大国,在煤炭行业迫切需要转型的形势下,研究赋煤区的地热资源成因与分布规律十分必要。华北赋煤区地热资源储量占全国的74.7%,是中国地热资源最富集的区域之一。区内分布有渤海湾盆地、鄂尔多斯盆地、沁水盆地和南华北盆地等主要含煤盆地,其岩石圈热状态自东向西逐步降低。地热储包括新生界砂岩孔隙型和寒武-奥陶系碳酸盐岩岩溶-裂隙型两大类型。碳酸盐岩岩溶-裂隙热储温度高、水量大、易于回灌,是煤田区地热勘查与开发利用的优先选择。【方法】针对煤田区地热地质的特点,开展地热系统动力学分析,优选华北赋煤区的地热勘查与开发区域。【结果和结论】提出煤田区有以下4种聚热模式:(1)煤层与碳酸盐岩地层储盖组合传导聚热;(2)基岩面起伏变化传导聚热;(3)断裂带地下水活动对流聚热;(4)碳酸盐岩基岩面风化壳岩溶以及侵入体接触面岩溶对流聚热。并结合实例进行数值模拟分析。在此基础上,指出华北赋煤区地热勘查与开发优先方向是深部碳酸盐岩储层中的地热资源。地热能作为非碳基能源之一,以其储量大、清洁、输出连续的特点,在未来社会对电力、燃料和热力三大能源需求中的热力供应方面尤其可以做出重要贡献,而中国地热与煤炭资源在空间分布上的重叠,使地热开发利用成为煤炭行业转型的有效途径之一。