关于青少年射击运动员气手枪击发规律性训练的浅析

射击项目里一致性是实弹密度集中的关键因素,一致性的训练就从击发规律抓起,要做好击发规律需要做好:一是准备动作的规律,二是击发动作的规律与规范。通过抓击发时间的规律,带动了击发前面的准备动作,击发时的压扳机动作,击发后的保持动作,一套动作程序的规律,有了规律就有了动作一致性。通过压扳机的规律性训练,让压扳机动作形成条件反射,让运动员自己感觉到只要进入到瞄区,食指自不而然的就会不停加压,做到了无意识响枪的动作。本论文通过用预报击发时时间与实际击发时时间做对比的方法,增加运动员对动作细节的时间概念,从而加强了动作的规律。经过以上训练过后,运动员感觉到击发时盯靶、抢扣的问题解决了,无意识响枪,心情就轻松多了,完成完整练习时心理负荷小了,敢打了。虽然在短时间里结果提高不太明显,但是一旦规律性击发的风格养成以后,对运动员的身心发展与走向更好层次的训练奠定了良好的基础。

玉米疯顶病发病规律及防治方法

玉米疯顶病可引起幼苗死亡、植株不育，为害极大，是玉米的主要病害之一。1990年后陆续在SC-704、掖单12号、东单7号等玉米品种大田里发生，有些年份发病率高达60～80％，严重影响玉米的产量和质量。

长堤油田边底水油藏发规律研究

本文针对长堤油田边底水油藏开发历程,就不同开发调整阶段新井初产、递减规律和含水上升规律进行了对比,并就其开发特点进行了规律性总结。

3类金佛山方竹林发笋规律比较

[目的]探究不同种源金佛山方竹实生苗林与天然林发笋规律的差异。[方法]在金佛山方竹天然林与箐坝、黄莲种源实生苗种植10年后的竹林分别设置3个5 m×5 m的样地进行发笋规律调查,在发笋期分别调查3类金佛山方竹林的发笋量。[结果]2个种源实生苗林与天然林的发笋规律不同,发笋量和质量以天然林最优,箐坝种源竹林其次,黄莲种源竹林最低。[结论]该研究表明在造林初期进行种苗选优对成林质量有直接影响。

山西地震带公元1000年以来M≥6地震时空发生规律探讨

介绍了山西地震带的概况,从时间和空间分布上分析了公元1000年以来山西地震带的发震规律,预测了山西地震带的活动趋势。

深圳市斜坡类地质灾害发育规律及防治建议

地质灾害防治是关系人民生命财产安全和城市生态文明建设的大事,深圳市位于海岸带海陆交互作用强烈的区域,近年来极端天气频繁,地质灾害的防治形势不容乐观。由于地质环境条件及气候特征等因素影响,崩塌和滑坡等斜坡类地质灾害是深圳市主要的地质灾害类型,其中由人类工程活动开挖且未采取有效支护措施而造成的地质灾害(隐患)占绝大多数,研究斜坡类地质灾害发育规律和防治对策对于城市公共安全体系建设意义重大。本文通过梳理深圳市近年来的地质灾害防治数据库结合现场调查,分析了深圳市斜坡类地质灾害的整体发育规律,结合目前深圳市斜坡类地质灾害防治管理工作的现状,总结了防治工作中存在的一些问题,并提出了改进建议。

太极拳运劲发力规律

太极拳的核心是技击，技击的核心是劲力。广大太极拳习练者十分渴望掌握运劲发力规律，使自己的劲运得美观、力发得漂亮。然而由于太极拳传统劲力理论的观点分歧、内容庞杂，广大习练者很难从中系统、全面地掌握运劲发力规律，从而影响了运劲发力水平的提高，难以达到理想效果。笔者用现代物理力学知识，将人体所受的力分为支撑力、磨擦力。

宿根甘蔗发株规律及其高产栽培技术

宿根甘蔗大田生态生物学特性,是提高蔗区宿根甘蔗产量的一项最基本功夫。认识宿根甘蔗在甘蔗生产中的地位及其重要意义,调查其在当地生产中的现状;掌握其与当地生产环境条件相结合的大田生态生物学特性,将栽培“三大环节”贯彻于生产全过程,实现宿根甘蔗产量上新台阶。

Study on Development Rule of Muscle Fiber in Different Duck Breeds

[Objective] The aim of this study was to investigate the development rule of muscle fiber in different duck breeds during various developmental stages. [Method] Cherry valley duck, Jinding duck, White muscory duck and Suma duck （ Cherry valley duck ♂ × Jinding duck ♀ ） were fed for 10 weeks to observe the ultrastructure of muscle fiber by electron microscope, and the myofibril diameter and sarcomere length were also determined. [Result] The myofibril diameter increased with ages. Sarcomere length and myofibril diameter did not change significantly with the increasing ages （P〉0.05）. The myofibril diameter of White muscory duck and Jinding duck were thicker, while that of Cherry valley cluck and Suma duck were thinner. Moreover, the sarcomere length of Suma duck and White muscory duck were longer, while that of Cherry valley duck and Jinding duck were shorter. Thus, the basic characteristics of ultrastructure of muscle fiber were consistent in these duck breeds.[Conclusion] The results have an important meaning for duck breeding.

Law of Occurrence and the Damage of Main Diseases and Pests in Ligusticum chuanxiong Hort Field

[Objective]The aim was to provide scientific basis for the prevention and treatment of the main diseases and pests. [Method]The systematic investigation was carried out in the process of seedling and field cultivation of Ligusticum chuanxiong. [Result]The main diseases were root rot,Powdery mildew and Spot blight,while the main pests were Epinotia leucantha Meyrick,Prodenia litura Fabr.,Scarabaeoidea,Tetranychus cinnabarinus Boisduval and Delia platura Meigen. [Conclusion]The law of occurrence of main diseases and pests were confirmed.

木材及木质复合材料的燃烧发烟规律

基于锥形量热仪法研究了马尾松、落叶松、杉木、泡桐、杨木等木材及胶合板、中密度纤维板(MDF)燃烧时发烟和烟气温度的变化规律,分析了辐射强度对木材及木质复合材料燃烧时发烟和烟气温度的影响。结果表明:木材及木质复合材料发烟和烟气温度的变化规律以"强—弱—强—弱"模式变化,发烟的强弱和烟气温度的高低与质量损失速率密切相关,即木材及木质材料质量损失速率越大,发烟越强,烟气温度也越高。以木纤维为复合单元的MDF发烟总量最大,其次是针叶树材,最小的为阔叶树材和胶合板。随着辐射强度的提高,木材及木质复合材料燃烧时的发烟总量和烟气温度呈增加或提高趋势,而且第2发烟峰和烟气温度峰有提前出现的趋势。

Reasearch on Occurrence Rules of Asian Corn Borer Ostrinia furnacalis in the Field of Waxy Corn

[Objective] This program aimed at providing basis for timely and effective control of Asian corn borer Ostrinia furnacalis in waxy corn fields through investigations and researching on occurrence and damage characteristics of Ostrinia furnacalis in the main producing area of waxy corn of Shanxi Province.[Method] Attraction and collection of the adults,fixed-points and random investigations on eggs and larvae were the main methods in this research.[Result] Ostrinia furnacalis appeared in two generations per year in the field of waxy corns,the generations were basically nonoverlapping with significant interval.The peak period of the overwintering generation adults in the field of waxy corn was early to middle of June,peak period of the first generation adults was from early August to late August;peak period of the first generation eggs was from the end of early June to the binning of late June,the peak period of the second generation eggs was from the middle of early August to late August.Egg-laying performances of Ostrinia furnacalis on waxy corns in different growth period suggested that the temptation of waxy corns to egg-laying of Ostrinia furnacalis had gradually increased with the continuation of growth stages before the heading of waxy corns;while after the heading of waxy corns,the temptation of waxy corns to egg-laying of Ostrinia furnacalis had gradually reduced with the continuation of growth stages.The amount of eggs on waxy corns was more than eggs on normal corns with the same growth period and growth conditions.The first generation of Ostrinia furnacalis caused more serious damages than the second generation.The first generation larvae caused more serious damages on waxy corns with early sowing period than with middle sowing period,while the late sowing fields basically uninjured.The early sowing and middle sowing corns were damaged but lightly,due to the slight occurrence of the first generation larvae.The second generation larvae caused more serious damages in late sowing waxy corn field than in middle sowing waxy corn field.As the early sowing waxy corns were harvested before the beginning of damage peak period of the second generation larvae,they were basically uninjured or slightly damaged by the second generation larvae in general years.Because the second generation larvae were in large-scale occurrence,they had caused serious damages to late and later middle sowing waxy corns.Incidence of ear rot disease on the female ears of waxy corns was closely related to the damages of Ostrinia furnacalis on ears,which was higher on the ears infested by Ostrinia furnacalis.[Conclusion] Comprehensive control on the second generation of Ostrinia furnacalis in the mid and late sowing field of waxy corn should be strengthened.

Capsule Development Characters at Different Positions of Sesame(Sesamum indicum)

[Objective] This study aimed to explore the capsule development at differ-ent positions of sesame （Sesamum indicum）. [Method] The number of flowers and capsules at lower part （below the 8th node from the bottom）, middle part （at 9th-20th nodes from the bottom） and upper part （above the 20th node） of sesame plants （Zhengzhi 98N09） was counted. The length, width, fresh weight of the capsules, fresh and dry weight of the seeds, and the dry weight of the capsule shel s at dif-ferent growth stages were measured. [Result] From the bottom to the top of sesame plants, the numbers of flowers and capsules at each node showed a trend of first increasing and then decreasing. The 15th and the 12th node had the maxi-mum flower number （9.3 flowers per node on average） and the maximum capsule number （4.2 capsules per node on average）, respectively. The middle nodes had the highest capsule setting rate, up to 45.1%, fol owed by that at upper nodes, 30.1%, and the capsule setting rate at lower nodes was the smal est, only 25.0%. The capsule length, width, fresh weight, seed fresh weight, dry weight and capsule shel dry weight at middle part were higher than that at lower and upper part. Moreover, grain fil ing rates of the lower, middle and upper capsules were 0.003 5, 0.004 4 and 0.003 0 g/（capsule·d）. It suggests that the substances gave priority to supply the middle capsules during the development of capsules. [Conclusion] This study wil provide theoretical basis for the cultivation of high-yielding sesame.

Study on the Occurrence and Epidemic Regularity and Region Division of Rice Blast in Nanchong City

With the aim to improve the level of monitoring and warning as well as the comprehensive control of rice blast disease, and to feasibly reduce the disease threat in Nanchong City, the methods of GPS and GIS, systematical monitoring and field survey, rice blast resistance identification, physiologic races of rice blast monitoring, and meteorological data analysis were performed to study the occurrence and epidemic region division, precise demarcation and occurrence and epidemic regularity of rice blast in Nanchong City. This study first completed the epidemic region division and precise demarcation; first clarified the initial affection（beginning period） locations, occurrence characteristics, epidemic trends and characteristics; explicated the existence of four epidemic peak periods of rice blast in the field, where the damage areas of first peak period played a decisive role during the blast epidemic years; in late May, the cumulative occurrence areas and annual occurrence areas presented higher positive correlation with the correlation coefficient of 0.817;and established a prediction model of occurrence areas per year based on the disease field rate at the end of boot stages and the diseased plant rate at dough stages. The results of investigation on the impact factors investigation of blast disease in Nanchong in recent years suggested that the internal causes were the decrease or loss of blast resistance of the rice cultivars, as well as the increase of physiological races with strong resistance to rice blast and the emergence of new virulent physiologic varieties; the external causes were suitable temperature, too much rainy, and sunlight shortage. Between 2010 and 2015, the short-term forecast accuracy for rice blast in Nanchong was up to 100%, and medium-and long-term forecast accuracy was also up to 98% and 95%, respectively, which increased by 5-15% than that before 1997, thereby making the control effect of rice blast in Nanchong increased by 15-30%.

Species and Occurrence of Scarab in Sweet Potato Growing Areas of Xuzhou,Jiangsu

Frequency-vibrancy pest-killing lamp was used to calculate the numbers and types of scarabs during the growing period of sweet potato in Xuzhou area, thus to study the occurrence regularity of scarab and effect of meteorological factor on its occurrence, which provided a reference and guidance for the control of grub in sweet potato field. The monitoring results indicated that scarabs in sweet potato planting area of Xuzhou mainly included Anomala corpulenta, Holotrichia parallela Motschulsky, Maladera verticalis and Holotrichia trichophora Fairm. Holotrichia tri- chophora Fairm has entered into its late stage at the early cultivation stage of sweet potato with a few occurrence quantities. The elongation stage of sweet potato vine is the full incidence period of imagoes of Maladera verticalis and Anomala cor- pulenta. Full incidence period of Holotrichia parallela Motschulsky is from late June to middle August, the outbreak cycle of which is long. The unearthed imagoes fol- low the regular change ＂many-few-many-few＂. Effects of meteorological factor on the activities of various scarabs are different. The activities of various scarabs are fre- quent in warm and windless sunny days. In rainy days, Holotrichia parallela Motschulsky, Holotrichia trichophora Fairm and Maladera verticalis are inactive. The numbers of Anomala corpulenta in cloudy days but not rainy days are higher than that in sunny days.